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1.	Aminoff, Anna, et al. (author) Novel mutations in microsomal triglyceride transfer protein including maternal uniparental disomy in two patients with abetalipoproteinemia 2012 In: Clinical Genetics. - : John Wiley & Sons. - 0009-9163 .- 1399-0004. ; 82:2, s. 197-200 Journal article (peer-reviewed)
2.	Bondeson, Marie-Louise, et al. (author) Homologous- and nonhomologous recombinations in the IDS-region- common cause of the Hunter syndrome 1997 In: Am. J. Hum. Genet. ; 61, s. 1445- Review (other academic/artistic)
3.	Bondeson, Marie-Louise, et al. (author) Identification of a deletion in 3q23 causing the Blepharophimosis, Ptosis and Epicantus Inversus syndrome (BPES) 2000 In: Am J Hum Genet. ; 67, s. 386- Review (other academic/artistic)
4.	Bryant, Patrick, et al. (author) Exome sequencing in a Swedish family with PMS2 mutation with varying penetrance of colorectal cancer : investigating the presence of genetic risk modifiers in colorectal cancer risk 2023 In: European Journal of Cancer Prevention. - 0959-8278 .- 1473-5709. ; 32:2, s. 113-118 Journal article (peer-reviewed)abstract Objective Lynch syndrome is caused by germline mutations in the mismatch repair (MMR) genes, such as the PMS2 gene, and is characterised by a familial accumulation of colorectal cancer. The penetrance of cancer in PMS2 carriers is still not fully elucidated as a colorectal cancer risk has been shown to vary between PMS2 carriers, suggesting the presence of risk modifiers.Methods Whole exome sequencing was performed in a Swedish family carrying a PMS2 missense mutation [c.2113G>A, p.(Glu705Lys)]. Thirteen genetic sequence variants were further selected and analysed in a case-control study (724 cases and 711 controls).Results The most interesting variant was an 18 bp deletion in gene BAG1. BAG1 has been linked to colorectal tumour progression with poor prognosis and is thought to promote colorectal tumour cell survival through increased NF-κB activity.Conclusions We conclude the genetic architecture behind the incomplete penetrance of PMS2 is complicated and must be assessed in a genome wide manner using large families and multifactorial analysis.
5.	Carlsson, Göran, 1951, et al. (author) Incidence of severe congenital neutropenia in Sweden and risk of evolution to myelodysplastic syndrome/leukaemia. 2012 In: British journal of haematology. - : Wiley. - 1365-2141 .- 0007-1048. ; 158:3, s. 363-369 Journal article (peer-reviewed)abstract Severe congenital neutropenia (SCN) is characterized by low blood neutrophil counts, early bacterial infections, and risk of leukaemia development. As yet, no population-based incidence estimates of SCN have been reported. Children less than 16years of age with SCN were sought in Sweden during the 20-year period 1987-2006 by a questionnaire to all Swedish Departments of Paediatrics and by reviewing the Swedish Health and Welfare Statistical Databases. Thirty-two patients were diagnosed with congenital neutropenia during this period. All received treatment with recombinant granulocyte-colony stimulating factor (G-CSF). Twenty-one patients were diagnosed as SCN or probable SCN, corresponding to 1·0 per 100000 live births. Nine (43%) had ELANE mutations, four (19%) HAX1 mutations and eight (38%) were children with disease of unknown genetic aetiology. Four out of 21 patients (19%) developed myelodysplastic syndrome/leukaemia and three (14%) died, all with leukaemia. The cumulative incidence of myelodysplastic syndrome/leukaemia was 31%. The observed incidence of SCN in this population-based study was higher than previously estimated, possibly because genetic testing now can identify SCN cases previously thought to be idiopathic or benign neutropenia. The risk of developing myelodysplastic syndrome/leukaemia is considerable. ELANE mutations are the most commonly identified genetic defects.
6.	Chen, Dongfeng, et al. (author) The Expression Pattern of the Pre-B Cell Receptor Components Correlates with Cellular Stage and Clinical Outcome in Acute Lymphoblastic Leukemia. 2016 In: PloS one. - : Public Library of Science (PLoS). - 1932-6203. ; 11:9 Journal article (peer-reviewed)abstract Precursor-B cell receptor (pre-BCR) signaling represents a crucial checkpoint at the pre-B cell stage. Aberrant pre-BCR signaling is considered as a key factor for B-cell precursor acute lymphoblastic leukemia (BCP-ALL) development. BCP-ALL are believed to be arrested at the pre-BCR checkpoint independent of pre-BCR expression. However, the cellular stage at which BCP-ALL are arrested and whether this relates to expression of the pre-BCR components (IGHM, IGLL1 and VPREB1) is still unclear. Here, we show differential protein expression and copy number variation (CNV) patterns of the pre-BCR components in pediatric BCP-ALL. Moreover, analyzing six BCP-ALL data sets (n = 733), we demonstrate that TCF3-PBX1 ALL express high levels of IGHM, IGLL1 and VPREB1, and are arrested at the pre-B stage. By contrast, ETV6-RUNX1 ALL express low levels of IGHM or VPREB1, and are arrested at the pro-B stage. Irrespective of subtype, ALL with high levels of IGHM, IGLL1 and VPREB1 are arrested at the pre-B stage and correlate with good prognosis in high-risk pediatric BCP-ALL (n = 207). Our findings suggest that BCP-ALL are arrested at different cellular stages, which relates to the expression pattern of the pre-BCR components that could serve as prognostic markers for high-risk pediatric BCP-ALL patients.
7.	de Miranda, Noel F. C. C., et al. (author) DNA repair genes are selectively mutated in diffuse large B cell lymphomas 2013 In: Journal of Experimental Medicine. - : Rockefeller University Press. - 0022-1007 .- 1540-9538. ; 210:9, s. 1729-1742 Journal article (peer-reviewed)abstract DNA repair mechanisms are fundamental for B cell development, which relies on the somatic diversification of the immunoglobulin genes by V(D)J recombination, somatic hypermutation, and class switch recombination. Their failure is postulated to promote genomic instability and malignant transformation in B cells. By performing targeted sequencing of 73 key DNA repair genes in 29 B cell lymphoma samples, somatic and germline mutations were identified in various DNA repair pathways, mainly in diffuse large B cell lymphomas (DLBCLs). Mutations in mismatch repair genes (EXO1, MSH2, and MSH6) were associated with microsatellite instability, increased number of somatic insertions/deletions, and altered mutation signatures in tumors. Somatic mutations in nonhomologous end-joining (NHEJ) genes (DCLRE1C/ARTEMIS, PRKDC/DNA-PKcs, XRCC5/KU80, and XRCC6/KU70) were identified in four DLBCL tumors and cytogenetic analyses revealed that translocations involving the immunoglobulin-heavy chain locus occurred exclusively in NHEJ-mutated samples. The novel mutation targets, CHEK2 and PARP1, were further screened in expanded DLBCL cohorts, and somatic as well as novel and rare germline mutations were identified in 8 and 5% of analyzed tumors, respectively. By correlating defects in a subset of DNA damage response and repair genes with genomic instability events in tumors, we propose that these genes play a role in DLBCL lymphomagenesis.
8.	Eisfeldt, Jesper, et al. (author) From cytogenetics to cytogenomics whole genome sequencing as a comprehensive genetic test in rare disease diagnostics 2019 In: Molecular Cytogenetics. - : BMC. - 1755-8166. ; 27, s. 1666-1667 Journal article (other academic/artistic)
9.	Enblom, Anna, et al. (author) Understanding rationales for acupuncture treated individuals beliefs in acupuncture effects, to be able to maximize therapeutic results: A qualitative analysis 2018 In: Complementary Therapies in Medicine. - : CHURCHILL LIVINGSTONE. - 0965-2299 .- 1873-6963. ; 39, s. 101-108 Journal article (peer-reviewed)abstract Objective: To investigate how individuals expressed rationales for their beliefs regarding efficacy of acupuncture. Methods: Qualitative data from participants of two different randomized sham-controlled trials, of relaxing (non cancer volunteers of the general population) or antiemetic (patients with cancer undergoing radiotherapy) effects of acupuncture was analyzed. Participants (n = 441) received genuine (n = 120 and n = 100) or sham (n = 121 and n = 100) (telescopic blunt sham-needle) relaxing or antiemetic acupuncture. The participants (n = 428; 97% response rate) expressed their belief regarding the efficacy of acupuncture, and n = 264 delivered qualitative rationales for their belief, analyzed using qualitative content analysis. Results: Of the 428 participants, 35 (8%) believed entirely that the acupuncture was effective, 209 (49%) believed much, 136 (32%) believed moderately, 39 (9%) believed a little, and 9 (2%) did not believe that the acupuncture was effective. Five categories and seven subcategories represented the meaning units of the central message of the rationales for the treatment belief. Participants with positive beliefs (believed entirely/much, n = 244) presented rationales related to: "Experienced positive effects", "Knowledge regarding effect-mechanisms of acupuncture", and "General trustworthiness of acupuncture". Participants with more negative beliefs (believed a little or not, n = 48) presented rationales related to: "Lack of feasibility of the acupuncture", "Varying effects", and "The effect is individual, not available for everybody". Conclusion: In order to strengthen acupuncture treated patients beliefs in the efficacy of acupuncture during clinical practice or research, acupuncture therapists may consider emphasizing these aspects in the therapeutic situation.
10.	Gustafsson Asting, Annika, et al. (author) COX-2 Gene Expression in Colon Cancer Tissue related to Regulating Factors and Promoter Methylation Status 2011 In: BMC Cancer. - : Springer Science and Business Media LLC. - 1471-2407. ; 11 Journal article (peer-reviewed)abstract Abstract Background Increased cyclooxygenase activity promotes progression of colorectal cancer, but the mechanisms behind COX-2 induction remain elusive. This study was therefore aimed to define external cell signaling and transcription factors relating to high COX-2 expression in colon cancer tissue. Method Tumor and normal colon tissue were collected at primary curative operation in 48 unselected patients. COX-2 expression in tumor and normal colon tissue was quantified including microarray analyses on tumor mRNA accounting for high and low tumor COX-2 expression. Cross hybridization was performed between tumor and normal colon tissue. Methylation status of up-stream COX-2 promoter region was evaluated. Results Tumors with high COX-2 expression displayed large differences in gene expression compared to normal colon. Numerous genes with altered expression appeared in tumors of high COX-2 expression compared to tumors of low COX-2. COX-2 expression in normal colon was increased in patients with tumors of high COX-2 compared to normal colon from patients with tumors of low COX-2. IL1β, IL6 and iNOS transcripts were up-regulated among external cell signaling factors; nine transcription factors (ATF3, C/EBP, c-Fos, Fos-B, JDP2, JunB, c-Maf, NF-κB, TCF4) showed increased expression and 5 (AP-2, CBP, Elk-1, p53, PEA3) were decreased in tumors with high COX-2. The promoter region of COX-2 gene did not show consistent methylation in tumor or normal colon tissue. Conclusions Transcription and external cell signaling factors are altered as covariates to COX-2 expression in colon cancer tissue, but DNA methylation of the COX-2 promoter region was not a significant factor behind COX-2 expression in tumor and normal colon tissue.
11.	Gustafsson Asting, Annika, et al. (author) Genetic Copy Number Variations in Colon Mucosa Indicating Risk for Colorectal Cancer. 2014 In: Journal of Cancer Therapy. - : Scientific Research Publishing, Inc.. - 2151-1934 .- 2151-1942. ; 5:14 Journal article (peer-reviewed)abstract Background: Sporadic colorectal tumors probably carry genetic alterations that may be related to familiar clusters according to risk loci visualized by SNP arrays on normal tissues. The aim of the present study was therefore to search for DNA regions (copy number variations, CNVs) as biomarkers associated to genetic susceptibility for early risk predictions of colorectal cancer. Such sequence alterations could provide additional information on phenotypic grouping of patients. Material and Methods: High resolution 105K oligonucleotide microarrays were used in search for CNV loci in DNA from tumor-free colon mucosa at primary operations for colon cancer in 60 unselected patients in comparison to DNA in buffy coat cells from 44 confirmed tumor-free and healthy blood donors. Array-detected CNVs were confirmed by Multiplex ligation-dependent probe amplification (MLPA). Results: A total number of 205 potential CNVs were present in DNA from colon mucosa. 184 (90%) of the 205 potential CNVs had been identified earlier in mucosa DNA from healthy individuals as reported to the Database of Genomic Variants. Remaining 21 (10%) CNVs were potentially novel sites. Two CNVs (3q23 and 10q21.1) were significantly related to colon cancer, but not confirmed in buffy coat DNA from the cancer patients. Conclusion: Our study reveals two CNVs that indicate increased risk for colon cancer; these DNA alterations may have been acquired by colon stem cells with subsequent appearance among epithelial mucosa cells. Impact: Certain mucosa CNV alterations may indicate individual susceptibility for malignant transformation in relationship to intestinal toxins and bacterial growth.
12.	Gustafsson Asting, Annika, et al. (author) Receptor and enzyme expression for prostanoid metabolism in colorectal cancer related to tumor tissue PGE2. 2010 In: International journal of oncology. - 1791-2423. ; 36:2, s. 469-478 Journal article (peer-reviewed)abstract Prostaglandins support progression of colorectal cancer by several mechanisms. This conclusion is based on epidemiological and drug intervention long-term studies or retrieved from animal and cell culture experiments. The aim of the present study was to map receptor and enzyme expression for prostanoid metabolism in the presence of high or low PGE2 content within colon cancer tissue at primary tumor operation and after short-term preoperative provision of non-steroidal anti-inflammatory drug (NSAID). Twenty-three unselected patients with colon cancer were randomly selected to receive indomethacin (NSAID) or sham treatment for 3 days before surgery. Normal colon and tumor tissue were collected at operation for RNA extraction. Tissue PGE2 levels were measured by radioimmunoassay. Gene expression was quantified by microarray and real-time PCR. COX-1 expression increased proportionally to COX-2 expression in colon cancer tissue from untreated patients. Indomethacin reduced PGE2 content in normal and tumor tissue with subsequently decreased IP, HPGD and PPARgamma receptor expression in both tumor and normal colon tissue, while subtype EP1-4 receptors were not significantly influenced by indomethacin treatment. MPGES-1 expression was not related to overall PGE2 content in tumor and colon tissue, but decreased significantly in normal tissue during indomethacin exposure. Reduction of tumor tissue PGE2 was related to significant alteration in expression of several hundred genes indicating decreased cell cycling and increased apoptosis during indomethacin treatment, probably related to upregulation of acute phase reactants in tumor tissue. Increased prostanoid activity in colon cancer tissue is related to cross-talk between tumor and stroma cells.
13.	Halvarsson, Britta, et al. (author) Loss of mismatch repair protein immunostaining in colorectal adenomas from patients with hereditary nonpolyposis colorectal cancer. 2005 In: Modern Pathology. - : Elsevier BV. - 1530-0285 .- 0893-3952. ; 18:8, s. 1095-1101 Journal article (peer-reviewed)abstract Colorectal adenomas occur at younger age, at increased frequency and have a greater tendency for malignant transformation in patients with hereditary nonpolyposis colorectal cancer (HNPCC). We performed immunostaining for the mismatch repair proteins MLH1, PMS2, MSH2 and MSH6 in 35 colorectal adenomas from 26 patients with HNPCC and identified loss of immunostaining in 23/35 (0.66) adenomas. Loss of mismatch repair protein immunostaining was particularly frequent in large (>5 mm) (14/16) and proximally located (13/15) adenomas, whereas the gene mutated - MLH1 or MSH2 - and the type of mutation did not seem to affect the results. We conclude that loss of mismatch repair protein immunostaining is detected at a lower rate in adenomas than in carcinomas associated with HNPCC. Adenomatous tissue can thus be used for immunostaining of mismatch repair proteins in clinical investigations of HNPCC, but whereas loss of immunostaining may pinpoint the gene affected and thereby guide mutation analysis, retained staining cannot exclude that the adenoma developed as part of the syndrome due to reduced sensitivity. However, the analysis has a greater chance of being informative if large and proximally located adenomas are selected.
14.	Halvarsson, Britta, et al. (author) Microsatellite instability analysis and/or immunostaining for the diagnosis of hereditary nonpolyposis colorectal cancer? 2004 In: Virchows Archiv: an international journal of pathology. - : Springer Science and Business Media LLC. - 1432-2307. ; 444, s. 135-141 Journal article (peer-reviewed)
15.	Halvarsson, Britta, et al. (author) The added value of PMS2 immunostaining in the diagnosis of hereditary nonpolyposis colorectal cancer. 2006 In: Familial Cancer. - : Springer Science and Business Media LLC. - 1389-9600 .- 1573-7292. ; 5:4, s. 353-358 Journal article (peer-reviewed)abstract dentification and characterization of the genetic background in patients with the hereditary nonpolyposis colorectal cancer (HNPCC) syndrome is important since control programmes can in a cost-effective manner prevent cancer development in high-risk individuals. HNPCC is caused by germline mismatch repair (MMR) gene mutations and the genetic analysis of HNPCC therefore includes assessment of microsatellite instability (MSI) and immunohistochemical MMR protein expression in the tumor tissue. MSI is found in >95% of the HNPCC-associated tumors and immunostaining using antibodies against the MMR proteins MLH1, MSH2, and MSH6 has been found to correctly pinpoint the affected gene in about 90% of the cases. The PMS2 antibody was the most recently developed and we have in a clinical material assessed the added value of PMS2 immunostaining in 213 patients with suspected hereditary colorectal cancer. All 119 MSS tumors showed retained expression for all four antibodies and PMS2 did thus not identify any underlying MMR defect in these cases. However, PMS2 immunostaining contributed to the characterization of the MMR defect in a subset of the MSI tumors. Concomitant loss of MLH1 and PMS2, which functionally interact in the MutL alpha complex, was found in 98% of the tumors from patients with germline MLH1 mutations. Among the 12 MSI-high tumors with retained expression of MLH1, MSH2 and MSH6, 8 tumors showed loss of PMS2 staining, and mutations in MLH1 were identified in 2 and mutations in PMS2 in 3 of these individuals. In summary, isolated loss of PMS2 was found in 8% of the MSI-high tumors in our series, including 8/12 previously unexplained MSI-high tumors, in which mutations either in MLH1 or in PMS2 were identified in five cases.
16.	Hammar, Björn, et al. (author) A new corneal disease with recurrent erosive episodes and autosomal-dominant inheritance 2008 In: Acta Ophthalmologica. - : Wiley. - 1755-375X .- 1755-3768. ; 86:7, s. 758-763 Journal article (peer-reviewed)abstract Purpose: The aim of this study was to characterize the phenotype in a large family with autosomal-dominant recurrent corneal erosions, and also to exclude genetic linkage to known autosomal-dominant inherited corneal dystrophies with clinical resemblance. Methods: We describe the medical history and clinical findings in patients from a six-generation family with recurrent corneal erosions. A total of 28 individuals were evaluated by ophthalmological examination. Genomic DNA was prepared from peripheral blood and analysed with polymorphic microsatellite markers close to known genes causing autosomal-dominant corneal dystrophies. Results: The patients had erosive symptoms that usually lasted from 1 to 7 days. The symptoms were described as early as at 8 months of age, and by the age of 5 the majority of the affected individuals suffered from recurrent corneal erosions. The attacks generally declined in frequency and intensity with age, and 52% of the patients developed central keloid-like corneal opacities. Nine patients received corneal grafts, and recurrences were seen in all grafts. The affected patients did not share haplotypes for genetic microsatellite markers surrounding known genes causing autosomal-dominant corneal dystrophies. Conclusion: We describe a new hereditary disease with recurrent corneal erosions. Attacks of symptoms similar to recurrent erosions dominate the phenotype, but half of those affected also developed corneal, keloid-like, central opacities. This disorder was not genetically linked to any clinically resembling corneal dystrophies with autosomal-dominant inheritance.
17.	Hammar, Björn, et al. (author) Dystrophia Helsinglandica : a new type of hereditary corneal recurrent erosions with late subepithelial fibrosis 2009 In: Acta ophthalmologica. - : Wiley. - 1755-3768 .- 1755-375X. ; 87:6, s. 659-667 Journal article (peer-reviewed)abstract Purpose: To describe the phenotype of an autosomal-dominant corneal dystrophy with an early onset of recurrent corneal erosions and development of subepithelial fibrosis in the cornea, and also to exclude genetic linkage to known corneal dystrophies with autosomal-dominant inheritance and clinical resemblance. Methods: We describe the medical history and clinical findings in individuals from a seven-generation family with recurrent corneal erosions. A total of 43 individuals were evaluated by ophthalmological examination. Genomic DNA was prepared from peripheral blood and polymorphic microsatellite markers were analysed to study haplotypes surrounding genes causing corneal dystrophies with similar phenotypes. Results: Erosive symptoms usually lasted for between 1 and 10 days. By the age of 7 almost all of the affected individuals suffered from recurrent corneal erosions. The attacks generally declined in frequency and intensity from the late 20s, but all examined individuals had developed subepithelial fibrosis by the age of 37. The fibrosis generally started in the mid periphery and was followed in some family members by central fibrosis and the development of gelatinous superficial elevations. Only a marginal reduction of visual acuity was seen in a few individuals. The affected individuals did not share haplotypes for genetic microsatellite markers surrounding genes that are known to cause autosomal-dominant corneal dystrophies. Conclusion: We describe a new type of autosomal-dominant corneal disorder with recurrent corneal erosions and subepithelial fibrosis not significantly affecting visual acuity.
18.	Karimi, Masoud, et al. (author) A retrospective study of extracolonic, non-endometrial cancer in Swedish Lynch syndrome families 2018 In: Hereditary Cancer in Clinical Practice. - : BMC. - 1731-2302 .- 1897-4287. ; 16 Journal article (peer-reviewed)abstract BackgroundLynch Syndrome is an autosomal dominant cancer syndrome caused by pathogenic germ-line variants in one of the DNA-mismatch-repair (MMR) genes MLH1, MSH2, MSH6 or PMS2. Carriers are predisposed to colorectal and endometrial cancer, but also other cancer types. The purpose of this retrospective study was to characterize the tumour spectrum of the Swedish Lynch syndrome families.MethodsData were obtained from genetically verified 235 Lynch families from five of the six health care regions in Sweden. The material was stratified for gender, primary cancer, age and mutated gene and the relative proportions of specific cancer types were compared to those in the general population.ResultsA total of 1053 family members had 1493 cancer diagnoses of which 1011 were colorectal or endometrial cancer. Individuals with pathogenic variants in MLH1 and MSH2 comprised 78% of the cohort. Among the 482 non-colorectal/non-endometrial cancer diagnoses, MSH2 carriers demonstrated a significantly increased proportion of urinary tract, gastric, small bowel, ovarian and non-melanoma skin cancer compared to the normal population. MLH1 carriers had an elevated proportion of gastrointestinal cancers (gastric, small bowel, pancreas), while MSH6 carriers had more ovarian cancer than expected. Gastric cancer was predominantly noted in older generations.ConclusionLynch syndrome confers an increased risk for multiple cancers other than colorectal and endometrial cancer. The proportions of other cancers vary between different MMR genes, with highest frequency in MSH2-carriers. Gender and age also affect the tumour spectrum, demonstrating the importance of additional environmental and constitutional parameters in determining the predisposition for different cancer types.
19.	Karimi, Masoud, et al. (author) A retrospective study of extracolonic, non-endometrial cancer in Swedish Lynch syndrome families 11 Medical and Health Sciences 1112 Oncology and Carcinogenesis 11 Medical and Health Sciences 1117 Public Health and Health Services 2018 In: Hereditary Cancer in Clinical Practice. - : Springer Science and Business Media LLC. - 1731-2302 .- 1897-4287. ; 16:1 Journal article (peer-reviewed)abstract Background: Lynch Syndrome is an autosomal dominant cancer syndrome caused by pathogenic germ-line variants in one of the DNA-mismatch-repair (MMR) genes MLH1, MSH2, MSH6 or PMS2. Carriers are predisposed to colorectal and endometrial cancer, but also other cancer types. The purpose of this retrospective study was to characterize the tumour spectrum of the Swedish Lynch syndrome families. Methods: Data were obtained from genetically verified 235 Lynch families from five of the six health care regions in Sweden. The material was stratified for gender, primary cancer, age and mutated gene and the relative proportions of specific cancer types were compared to those in the general population. Results: A total of 1053 family members had 1493 cancer diagnoses of which 1011 were colorectal or endometrial cancer. Individuals with pathogenic variants in MLH1 and MSH2 comprised 78% of the cohort. Among the 482 non-colorectal/non-endometrial cancer diagnoses, MSH2 carriers demonstrated a significantly increased proportion of urinary tract, gastric, small bowel, ovarian and non-melanoma skin cancer compared to the normal population. MLH1 carriers had an elevated proportion of gastrointestinal cancers (gastric, small bowel, pancreas), while MSH6 carriers had more ovarian cancer than expected. Gastric cancer was predominantly noted in older generations. Conclusion: Lynch syndrome confers an increased risk for multiple cancers other than colorectal and endometrial cancer. The proportions of other cancers vary between different MMR genes, with highest frequency in MSH2-carriers. Gender and age also affect the tumour spectrum, demonstrating the importance of additional environmental and constitutional parameters in determining the predisposition for different cancer types.
20.	Karsten, Stanislav, et al. (author) Identification and analysis of alternative transcripts from iduronate-2-sulfatase (IDS) region 2000 In: Eur J Hum Genet. ; 8, s. 143- Review (other academic/artistic)
21.	Karsten, Stanislav L., et al. (author) Two distinct deletions in the IDS gene and the gene W : a novel type of mutation associated with the Hunter syndrome 1997 In: Genomics. - : Elsevier BV. - 0888-7543 .- 1089-8646. ; 43:2, s. 123-129 Journal article (peer-reviewed)abstract A novel mutation has been identified in a patient with the Hunter syndrome (mucopolysaccharidosis type II), in whom the disorder is associated with two distinct deletions separated by 30 kb. The deletions were characterized by Southern blot and PCR analyses, and the nucleotide sequences at both junctions were determined. The first deletion, corresponding to a loss of 3152 bp of DNA, included exons 5 and 6 of the iduronate-2-sulfatase (IDS) gene. The second deletion was 3603 bp long and included exons 3 and 4 of geneW, which is located in the DXS466 locus telomeric of theIDSgene. Both deletions are the result of nonhomologous (illegitimate) recombination events between short direct repeats at the deletion breakpoints. An interesting finding was the presence of the heptamer sequence 5′-TACTCTA-3′ present at both deletion junctions, suggesting that this motif might be a hot spot for recombination. We propose that the double deletion is the result of homology-associated nonhomologous recombinations caused by the presence of large duplicated regions in Xq27.3–q28.
22.	Kvarnung, Malin, et al. (author) Genomic screening in rare disorders : new mutations and phenotypes, highlighting ALG14 as a novel cause of severe intellectual disability 2018 In: Clinical Genetics. - : John Wiley & Sons. - 0009-9163 .- 1399-0004. ; 94:6, s. 528-537 Journal article (peer-reviewed)abstract We have investigated 20 consanguineous families with multiple children affected by rare disorders. Detailed clinical examinations, exome sequencing of affected as well as unaffected family members and further validation of likely pathogenic variants were performed. In 16/20 families, we identified pathogenic variants in autosomal recessive disease genes (ALMS1, PIGT, FLVCR2, TFG, CYP7B1, ALG14, EXOSC3, MEGF10, ASAH1, WDR62, ASPM, PNPO, ERCC5, KIAA1109, RIPK4, MAN1B1). A number of these genes have only rarely been reported previously and our findings thus confirm them as disease genes, further delineate the associated phenotypes and expand the mutation spectrum with reports of novel variants. We highlight the findings in two affected siblings with splice altering variants in ALG14 and propose a new clinical entity, which includes severe intellectual disability, epilepsy, behavioral problems and mild dysmorphic features, caused by biallelic variants in ALG14.
23.	Lagerstedt, Kristina, et al. (author) A Randomized Sham-Controlled Mixed Methods Pilot Study of the Feasibility of Acupuncture for Chemotherapy-Induced Neuropathy: Lessons Learned From Patient Experiences in Integrative Cancer Care 2023 In: Integrative Cancer Therapies. - : SAGE. - 1534-7354 .- 1552-695X. ; 22 Journal article (peer-reviewed)abstract ObjectiveSince there is a lack of effective pharmacological therapies for chemotherapy-induced neuropathy and many patients ask for integrative cancer therapies such as acupuncture, the objective of this pilot study was to describe patients’ experiences, and to study the feasibility and short-term effects of genuine acupuncture for chemotherapy-induced neuropathic pain and unpleasant sensations compared to sham acupuncture.Methods:The pilot study used mixed methods, collecting quantitative and qualitative data. Patients (n = 12) with chemotherapy-induced neuropathy after colorectal cancer were blindly randomized to genuine acupuncture or telescopic sham acupuncture. Individual interviews were conducted, and were analyzed using qualitative content analysis. The patients registered pain and unpleasant sensations (100 mm Visual Analog Scales) before and after n = 120 sessions, n = 60 genuine and n = 60 sham acupuncture sessions.Results:Five categories of patient experiences were described. The neuropathy negatively affected life. Physical activity was perceived to be important for health, but neuropathy was a barrier. The neuropathy required symptom-managing strategies. Acupuncture was pleasant and valuable, but some patients presented doubts regarding its effect mechanisms. After the genuine acupuncture sessions, pain (mean −2.0 steps relief during each session) and unpleasant sensations (−2.4) in the face was reduced more than after sham acupuncture (+0.1 steps worse pain, P = .018, +0.1 steps worse unpleasant sensations, P = .036). After genuine acupuncture, unpleasant sensations in the hands were reduced less (−0.23) compared to after sham acupuncture (−5.5, P = .002). Pain or unpleasant sensations in the feet did not change.Conclusions:Patients experienced that the neuropathy negatively changed their life and that acupuncture was pleasant and valuable. Patients receiving genuine acupuncture had short-term effects regarding pain and unpleasant sensations in the face compared to patients receiving sham acupuncture, while hands and feet did not improve. The patients were successfully blinded and complied with the acupuncture. We welcome future full-scaled randomized sham-controlled acupuncture studies.
24.	Lagerstedt, Kristina, et al. (author) Analysis of a 43.6 kb deletion in a patient with Hunter syndrome (MPS II): the identification of a fusion transcript including sequences from the gene W and the IDS gene 2000 In: Hum Mutation. ; 15, s. 324- Journal article (peer-reviewed)
25.	Lagerstedt, Kristina, et al. (author) Double-strand breaks may initiate the inversion mutation causing the Hunter syndrome 1997 In: Human Molecular Genetics. - : Oxford University Press (OUP). - 0964-6906 .- 1460-2083. ; 6:4, s. 627-633 Journal article (peer-reviewed)abstract We have previously shown that patients with the Hunter syndrome frequently have suffered from a recombination event between the IDS gene and its putative pseudogene, IDS-2, resulting in an inversion of the intervening DNA. The inversion, which might be the consequence of an intrachromosomal mispairing, is caused by homologous recombination between sequences located in intron 7 of the IDS gene and sequences located distal of exon 3 in IDS-2. In order to gain insight into the mechanisms causing the inversion, we have isolated both inversion junctions in six unrelated patients. DNA sequence analysis of the junctions showed that all recombinations have taken place within a 1 kb region where the sequence identity is >98%. An interesting finding was the identification of regions with alternating IDS gene and IDS-2 sequences present at one inversion junction, suggesting that the recombination event has been initiated by a double-strand break in intron 7 of the IDS gene. The results from this study suggest that homologous recombination in man could be explained by mechanisms similar to those described for Saccharomyces cerevisiae. The results also have practical implications for diagnosis of patients with the Hunter syndrome.
26.	Lagerstedt, Kristina, 1976, et al. (author) Genes with relevance for early to late progression of colon carcinoma based on combined genomic and transcriptomic information from the same patients. 2010 In: Cancer informatics. - 1176-9351. ; 9, s. 79-91 Journal article (peer-reviewed)abstract BACKGROUND: Genetic and epigenetic alterations in colorectal cancer are numerous. However, it is difficult to judge whether such changes are primary or secondary to the appearance and progression of tumors. Therefore, the aim of the present study was to identify altered DNA regions with significant covariation to transcription alterations along colon cancer progression. METHODS: Tumor and normal colon tissue were obtained at primary operations from 24 patients selected by chance. DNA, RNA and microRNAs were extracted from the same biopsy material in all individuals and analyzed by oligo-nucleotide array-based comparative genomic hybridization (CGH), mRNA- and microRNA oligo-arrays. Statistical analyses were performed to assess statistical interactions (correlations, co-variations) between DNA copy number changes and significant alterations in gene and microRNA expression using appropriate parametric and non-parametric statistics. RESULTS: Main DNA alterations were located on chromosome 7, 8, 13 and 20. Tumor DNA copy number gain increased with tumor progression, significantly related to increased gene expression. Copy number loss was not observed in Dukes A tumors. There was no significant relationship between expressed genes and tumor progression across Dukes A-D tumors; and no relationship between tumor stage and the number of microRNAs with significantly altered expression. Interaction analyses identified overall 41 genes, which discriminated early Dukes A plus B tumors from late Dukes C plus D tumor; 28 of these genes remained with correlations between genomic and transcriptomic alterations in Dukes C plus D tumors and 17 in Dukes D. One microRNA (microR-663) showed interactions with DNA alterations in all Dukes A-D tumors. CONCLUSIONS: Our modeling confirms that colon cancer progression is related to genomic instability and altered gene expression. However, early invasive tumor growth seemed rather related to transcriptomic alterations, where changes in microRNA may be an early phenomenon, and less to DNA copy number changes.
27.	Lagerstedt, Kristina, 1976 (author) Genetic Analyses of Tumor Progression in Colorectal Cancer 2009 Doctoral thesis (other academic/artistic)abstract Colorectal tumors are responsible for more than 600 000 deaths per year worldwide and thereby constitute the second most common cause of cancer related mortality. Early detection is related to improved prognosis and identification of genetic biomarkers would meliorate available diagnostic tools. Existing tumor classification systems lack precise monitoring within individual tumor stages in relation to progression. Therefore, we performed genetic characterization of tumor progression by analyses of colorectal tumors and normal colon mucosa. We used combined microarray analysis to obtain a set of candidate biomarkers, starting with genome-wide array-based DNA analyses to screen for tumor-specific aberrant DNA patterns followed by correlations to the associated changes in mRNA and microRNA expression. We also investigated the relation between functional p53 and tumor progression as well as survival in patients with colorectal cancer (CRC). Furthermore, we used high resolution oligonucleotide array based CGH to identify nonpolymorphic structural variation in DNA from normal colon biopsies from patients with confirmed CRC to reveal candidate regions with association to putative familial CRC genetic variants. Colorectal tumor progression is proposed to follow a step-wise transformation from normal cells into malignant tumors, and therefore we used different stages within this model to summarize our results, in terms of genetic events of potential importance. First, gain in parts of chromosome 20 encompassing AURKA, as well as alterations in p53 (17p13.1), may be involved in the development from adenoma to carcinoma. Second, loss of 18q and gain of 8q harboring SMAD7 and PTP4A3 appear to rise during progression defined as early (Dukes A and B) to late (Dukes C and D) tumor stage. Third, distant metastatic potential may be associated to loss of 8p and increased expression of miR-373. Fourth, putative structural variants observed in normal colon mucosa may predispose for the onset of malignant transformation in familial sporadic CRC. Finally, there is a clear relationship between increased properties of aberrant DNA content as well as the number of combined genetic events and tumor progression. We conclude that correlated changes in DNA and RNA abundance may represent a robust rationale for selection of genetic biomarkers. Moreover, our results also suggest that Dukes D tumors possibly develop in a way that does not fit into the stepwise progression model, illustrated by earlier onset and less genetic aberrations. These results represent a set of genetic events that can hopefully contribute to improved procedures considering diagnosis and prognosis in CRC patients by providing genetic biomarkers.
28.	Lagerstedt, Kristina, et al. (author) Genomic alterations in coleorectal cencer in relationship to stage and survival assesed by tiling BAC array CGH 2008 In: Cellular Oncology. - 1570-5870 .- 2211-3428. ; 30:2, s. 129-129 Conference paper (peer-reviewed)
29.	Lagerstedt, Kristina (author) Genomic rearrangements at the cause of three genetic disorders in man 2001 Doctoral thesis (other academic/artistic)abstract Genomic rearrangements are a common cause of genetic disorders in man. This thesis describes the analysis of genomic rearrangements observed in patients with the Hunter syndrome (MPS II), incontinentia pigmenti (IP) and the Blepharophimosis, ptosis and epicanthus inversus syndrome (BPES). MPS II is an X-linked recessive lysosomal storage disorder. In MPS II, structural rearrangements in the IDS locus are observed in 20 % of affected individuals. In order to analyze and characterize these aberrations, rearrangement junctions were isolated and analyzed from eight unrelated individuals suffering from inversions or deletions in the IDS region. The results showed that rearrangements had occurred either by means of nonhomologous end joining (NHEJ) or homologous recombination (HR). Some of the deletions in the IDS gene were the result of NHEJ while inversions were the result of HR between the IDS gene and a locus of high sequence identity, IDS-2, located telomeric of the IDS gene. We also propose that the HR was initiated by a double-strand break in the IDS locus. A novel rearrangement in the IDS locus was also identified in a family with XY, XX and XXY males. IP is a rare multisystem ectodermal disorder with X-linked dominant inheritance. A large set of Swedish patients with IP was screened for mutations in the NEMO gene. In 70 % of the probands, including both familial and sporadic cases, a 12 kb deletion spanning exons 4-10 of the NEMO gene was observed. The deletion is caused by a homologous recombination event between two identical repeats located in intron 3 of the NEMO gene and 3´ of the gene. The clinical manifestations were quite variable, even within IP patients carrying the same mutation. BPES is a disorder affecting cranofacial development. A transcription factor, FOXL2, has been found to be defective in patients with the disorder. A boy with BPES and associated anomalies, suggestive of a contiguous gene deletion syndrome, was investigated using polymorphic markers and fluorescent in situ hybridization (FISH). A deletion of approximately 40 kb was identified within a novel gene, C3orf5. The deletion is located approximately 250 kb upstream of FOXL2. It was suggested that the extragenic deletion in C3orf5 may exert a position effect of FOXL2, and possibly also of other genes in the BPES region.
30.	Lagerstedt, Kristina, 1976, et al. (author) The role of combined allelic imbalance and mutations of p53 in tumor progression and survival following surgery for colorectal carcinoma 2005 In: International journal of oncology. - 1019-6439. ; 27:6, s. 1707-15 Journal article (peer-reviewed)abstract The role of p53 mutations in disease progression and survival of colorectal cancer is unclear, since numerous studies have reported different conclusions. However, few reports, if any, have evaluated disease progression and survival in relationship to 'functional' and 'non-functional' p53 status defined by genetic and molecular indications. Malignant colorectal tumors, from 72 unselected patients who underwent primary and potentially curative elective tumor resections, were either classified as p53 functional (p53+/+, p53+/-) or non-functional (p53-/-) based on DNA sequence analysis of all p53 exons, including determination of allelic imbalance of p53 (LOH), according to four DNA markers; 2 within the coding gene and two markers in the immediate flanking regions of p53. Tumor frequency of microsatellite instability was also analyzed according to Dukes' A-D stages. Dukes' staging predicted survival as expected, while the conceptual p53 status, functional p53 vs non-functional p53, did not clear-cut predict disease specific survival. p53 mutations alone or allelic imbalance inside the reading frame of the gene were unpredictive of survival, while allelic imbalance downstream of p53 predicted reduced survival (p < 0.05). The present study demonstrates that base mutations in combination with allelic imbalance within the reading frame of p53 do not predict survival or progression of colorectal cancer, while allelic imbalance upstream coding parts of the gene predicted disease-specific survival in univariate analysis. Thus, structural alterations within the gene seem less important than alterations in regions with potential control elements.
31.	Lagerstedt, Kristina, 1976, et al. (author) Tumor Genome Wide DNA Alterations Assessed by Array CGH in Patients with Poor and Excellent Survival Following Operation for Colorectal Cancer. 2007 In: Cancer informatics. - 1176-9351. ; 3, s. 341-55 Journal article (peer-reviewed)abstract Genome wide DNA alterations were evaluated by array CGH in addition to RNA expression profiling in colorectal cancer from patients with excellent and poor survival following primary operations.DNA was used for CGH in BAC and cDNA arrays. Global RNA expression was determined by 44K arrays. DNA and RNA from tumor and normal colon were used from cancer patients grouped according to death, survival or Dukes A, B, C and D tumor stage. Confirmed DNA alterations in all Dukes A - D were judged relevant for carcinogenesis, while changes in Dukes C and D only were regarded relevant for tumor progression.Copy number gain was more common than loss in tumor tissue (p < 0.01). Major tumor DNA alterations occurred in chromosome 8, 13, 18 and 20, where short survival included gain in 8q and loss in 8p. Copy number gains related to tumor progression were most common on chromosome 7, 8, 19, 20, while corresponding major losses appeared in chromosome 8. Losses at chromosome 18 occurred in all Dukes stages. Normal colon tissue from cancer patients displayed gains in chromosome 19 and 20. Mathematical Vector analysis implied a number of BAC-clones in tumor DNA with genes of potential importance for death or survival.The genomic variation in colorectal cancer cells is tremendous and emphasizes that BAC array CGH is presently more powerful than available statistical models to discriminate DNA sequence information related to outcome. Present results suggest that a majority of DNA alterations observed in colorectal cancer are secondary to tumor progression. Therefore, it would require an immense work to distinguish primary from secondary DNA alterations behind colorectal cancer.
32.	Lagerstedt-Robinson, Kristina, et al. (author) A retrospective two centre study of Birt-Hogg-Dube syndrome reveals a pathogenic founder mutation in FLCN in the Swedish population 2022 In: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 17:2 Journal article (peer-reviewed)abstract Birt-Hogg-Dube syndrome (BHDS) (MIM: 135150) is a rare autosomal dominant disorder with variable penetrance, caused by pathogenic variants in the FLCN gene. Only a few hundreds of families have so far been described in the literature. Patients with BHDS present with three distinct symptoms: fibrofolliculomas, pneumothorax due to lung cyst formation, and increased lifetime risk of kidney tumours. The aim of the current study was to estimate the incidence of BHDS in the Swedish population and further describe the clinical manifestations and their frequency. Splice variant c.779+1G>T was the most common pathogenic variant, found in 57% of the families, suggesting this may be a founder mutation in the Swedish population. This was further investigated using haplotype analysis in 50 families that shared a common haplotype. Moreover, according to gnomAD the carrier frequency of the c.779+1G>T variant has been estimated to be 1/3265 in the Swedish population, however our data suggest that the carrier frequency in the Swedish population may be significantly higher. These findings should raise awareness among physicians of different specialties to patients presenting with fibrofolliculomas, pneumothorax and/or kidney tumours. We also stress the importance of consensus recommendations regarding diagnosis and clinical management of this, not that uncommon, syndrome.
33.	Lindstrand, Anna, et al. (author) From cytogenetics to cytogenomics : whole-genome sequencing as a first-line test comprehensively captures the diverse spectrum of disease-causing genetic variation underlying intellectual disability 2019 In: Genome Medicine. - : BMC. - 1756-994X. ; 11:1 Journal article (peer-reviewed)abstract BackgroundSince different types of genetic variants, from single nucleotide variants (SNVs) to large chromosomal rearrangements, underlie intellectual disability, we evaluated the use of whole-genome sequencing (WGS) rather than chromosomal microarray analysis (CMA) as a first-line genetic diagnostic test.MethodsWe analyzed three cohorts with short-read WGS: (i) a retrospective cohort with validated copy number variants (CNVs) (cohort 1, n=68), (ii) individuals referred for monogenic multi-gene panels (cohort 2, n=156), and (iii) 100 prospective, consecutive cases referred to our center for CMA (cohort 3). Bioinformatic tools developed include FindSV, SVDB, Rhocall, Rhoviz, and vcf2cytosure.ResultsFirst, we validated our structural variant (SV)-calling pipeline on cohort 1, consisting of three trisomies and 79 deletions and duplications with a median size of 850kb (min 500bp, max 155Mb). All variants were detected. Second, we utilized the same pipeline in cohort 2 and analyzed with monogenic WGS panels, increasing the diagnostic yield to 8%. Next, cohort 3 was analyzed by both CMA and WGS. The WGS data was processed for large (>10kb) SVs genome-wide and for exonic SVs and SNVs in a panel of 887 genes linked to intellectual disability as well as genes matched to patient-specific Human Phenotype Ontology (HPO) phenotypes. This yielded a total of 25 pathogenic variants (SNVs or SVs), of which 12 were detected by CMA as well. We also applied short tandem repeat (STR) expansion detection and discovered one pathologic expansion in ATXN7. Finally, a case of Prader-Willi syndrome with uniparental disomy (UPD) was validated in the WGS data.Important positional information was obtained in all cohorts. Remarkably, 7% of the analyzed cases harbored complex structural variants, as exemplified by a ring chromosome and two duplications found to be an insertional translocation and part of a cryptic unbalanced translocation, respectively.ConclusionThe overall diagnostic rate of 27% was more than doubled compared to clinical microarray (12%). Using WGS, we detected a wide range of SVs with high accuracy. Since the WGS data also allowed for analysis of SNVs, UPD, and STRs, it represents a powerful comprehensive genetic test in a clinical diagnostic laboratory setting.
34.	Lindstrand, Anna, et al. (author) Genome sequencing is a sensitive first-line test to diagnose individuals with intellectual disability 2022 In: Genetics in Medicine. - : ELSEVIER SCIENCE INC. - 1098-3600 .- 1530-0366. ; 24:11, s. 2296-2307 Journal article (peer-reviewed)abstract Purpose: Individuals with intellectual disability (ID) and/or neurodevelopment disorders (NDDs) are currently investigated with several different approaches in clinical genetic diagnostics. Methods: We compared the results from 3 diagnostic pipelines in patients with ID/NDD: genome sequencing (GS) first (N = 100), GS as a secondary test (N = 129), or chromosomal microarray (CMA) with or without FMR1 analysis (N = 421). Results: The diagnostic yield was 35% (GS -first), 26% (GS as a secondary test), and 11% (CMA/FMR1). Notably, the age of diagnosis was delayed by 1 year when GS was performed as a secondary test and the cost per diagnosed individual was 36% lower with GS first than with CMA/FMR1. Furthermore, 91% of those with a negative result after CMA/FMR1 analysis (338 individuals) have not yet been referred for additional genetic testing and remain undiagnosed. Conclusion: Our findings strongly suggest that genome analysis outperforms other testing strategies and should replace traditional CMA and FMR1 analysis as a first-line genetic test in individuals with ID/NDD. GS is a sensitive, time-and cost-effective method that results in a confirmed molecular diagnosis in 35% of all referred patients. (c) 2022 The Authors. Published by Elsevier Inc. on behalf of American College of Medical Genetics and Genomics. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
35.	Lönnroth, Christina, 1946, et al. (author) Preoperative treatment with a non-steroidal anti-inflammatory drug (NSAID) increases tumor tissue infiltration of seemingly activated immune cells in colorectal cancer. 2008 In: Cancer immunity : a journal of the Academy of Cancer Immunology. - 1424-9634. ; 8 Journal article (peer-reviewed)abstract This study evaluates HLA gene expression and tumor infiltration by B-cells, macrophages, dendritic cells, T-helper and cytotoxic T-lymphocytes in response to short-term preoperative treatment with cyclooxygenase inhibitors. Patients with colorectal carcinoma were randomized to receive oral NSAID (indomethacin or celebrex) for three days preoperatively; controls received esomeprazol. Peroperative tumor biopsies and normal colon tissue were analyzed by microarray, quantitative PCR and immunohistochemistry. Efficacy of short-term systemic NSAID treatment was confirmed by measurement of PGE2 production in blood monocytes from healthy volunteers. NSAID treatment upregulated genes at the MHC locus on chromosome 6p21 in tumor tissue, but not in normal colon tissue, from the same patient. 23 of the 100 most upregulated genes belonged to MHC class II. HLA-DM, -DO (peptide loading), HLA-DP, -DQ, -DR (antigen presentation), granzyme B, H, perforin and FCGR3A (CD16) (cytotoxicity) displayed increased expression, as did CD8, a marker of cytotoxic T-lymphocytes, while HLA-A and -C expression were not increased by NSAID treatment. MHC II protein (HLA-DP, -DQ, -DR) levels and infiltration by CD4+ T-helper cells of tumor stroma increased upon NSAID treatment, while CD8+ cytotoxic T-lymphocytes increased in both tumor stroma and epithelium. Molecules associated with immunosuppressive T regulatory cells (FOXP3, IL-10) were significantly decreased in indomethacin-exposed tumors. Standard oral administration of NSAID three days preoperatively was enough to increase tumor infiltration by seemingly activated immune cells. These findings agree with previous information that high prostanoid activities in colorectal cancer increase the risk for reduced disease-specific survival following tumor resection.
36.	Paucar, Martin, et al. (author) Genetic screening for Huntington disease phenocopies in Sweden : A tertiary center case series focused on short tandem repeat (STR) disorders 2023 In: Journal of the Neurological Sciences. - : Elsevier. - 0022-510X .- 1878-5883. ; 451 Journal article (peer-reviewed)abstract ObjectiveTo perform a screening for Huntington disease (HD) phenocopies in a Swedish cohort.MethodsSeventy-three DNA samples negative for HD were assessed at a tertiary center in Stockholm. The screening included analyses for C9orf72-frontotemporal dementia/amyotrophic lateral sclerosis (C9orf72-FTD/ALS), octapeptide repeat insertions (OPRIs) in PRNP associated with inherited prion diseases (IPD), Huntington's disease-like 2 (HDL2), spinocerebellar ataxia-2 (SCA2), spinocerebellar ataxia 3 (SCA3) and spinocerebellar ataxia-17 (SCA17). Targeted genetic analysis was carried out in two cases based on the salient phenotypic features.ResultsThe screening identified two patients with SCA17, one patient with IPD associated with 5-OPRI but none with nucleotide expansions in C9orf72 or for HDL2, SCA2 or SCA3. Furthermore, SGCE-myoclonic-dystonia 11 (SGCE-M-D) and benign hereditary chorea (BHC) was diagnosed in two sporadic cases. WES identified VUS in STUB1 in two patients with predominant cerebellar ataxia.ConclusionsOur results are in keeping with previous screenings and suggest that other genes yet to be discovered are involved in the etiology of HD phenocopies.
37.	Rasi, Chiara, et al. (author) PatientMatcher : A customizable Python-based open-source tool for matching undiagnosed rare disease patients via the Matchmaker Exchange network 2022 In: Human Mutation. - : Wiley. - 1059-7794 .- 1098-1004. ; 43:6, s. 708-716 Journal article (peer-reviewed)abstract The amount of data available from genomic medicine has revolutionized the approach to identify the determinants underlying many rare diseases. The task of confirming a genotype–phenotype causality for a patient affected with a rare genetic disease is often challenging. In this context, the establishment of the Matchmaker Exchange (MME) network has assumed a pivotal role in bridging heterogeneous patient information stored on different medical and research servers. MME has made it possible to solve rare disease cases by “matching” the genotypic and phenotypic characteristics of a patient of interest with patient data available at other clinical facilities participating in the network. Here, we present PatientMatcher (https://github.com/Clinical-Genomics/patientMatcher), an open-source Python and MongoDB-based software solution developed by Clinical Genomics facility at the Science for Life Laboratory in Stockholm. PatientMatcher is designed as a standalone MME server, but can easily communicate via REST API with external applications managing genetic analyses and patient data. The MME node is being implemented in clinical routine in collaboration with the Genomic Medicine Center Karolinska at the Karolinska University Hospital. PatientMatcher is written to implement the MME API and provides several customizable settings, including a custom-fit similarity score algorithm and adjustable matching results notifications.
38.	Ren, Weicheng, et al. (author) Uncoupling of Natural IgE Production and CD23 Surface Expression Levels 2013 In: Plos One. - : Public Library of Science (PLoS). - 1932-6203. ; 8:4 Journal article (peer-reviewed)abstract CD23, the low affinity receptor for immunoglobulin E (IgE), has been proposed to play a critical role in
39.	Robinson, Kristina Lagerstedt, et al. (author) Lynch syndrome (hereditary nonpolyposis colorectal cancer) diagnostics 2007 In: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 1460-2105 .- 0027-8874. ; 99:4, s. 291-299 Journal article (peer-reviewed)abstract Background Preventive programs for individuals who have high lifetime risks of colorectal cancer may reduce disease morbidity and mortality. Thus, it is important to identify the factors that are associated with hereditary colorectal cancer and to monitor the effects of tailored surveillance. In particular, patients with Lynch syndrome, hereditary nonpolyposis colorectal cancer (HNPCC), have an increased risk to develop colorectal cancer at an early age. The syndrome is explained by germline mutations in DNA mismatch repair (MMR) genes, and there is a need for diagnostic tools to preselect patients for genetic testing to diagnose those with HNPCC. Methods Patients (n = 112) from 285 families who were counseled between 1990 and 2005 at a clinic for patients at high risk for HNPCC were selected for screening to detect mutations in MMR genes MLH1, MSH2, MSH6, and PMS2 based on family history, microsatellite instability (MSI), and immunohistochemical analysis of MMR protein expression. Tumors were also screened for BRAF V600E mutations; patients with the mutation were considered as non-HNPCC. Results Among the 112 patients who were selected for screening, 69 had germline MMR mutations (58 pathogenic and 11 of unknown biologic relevance). Sixteen of the 69 mutations (23%) were missense mutations. Among patients with MSI-positive tumors, pathogenic MMR mutations were found in 38 of 43 (88%) of patients in families who met Amsterdam criteria and in 13 of 22 (59%) of patients in families who did not. Among patients with MSI-negative tumors, pathogenic MMR mutations were found in 5 of 17 (29%) of families meeting Amsterdam criteria and in 1 of 30 (3%) of non-Amsterdam families with one patient younger than age 50 years. In three patients with MSI-negative tumors who had pathogenic mutations in MLH1 or MSH6, immunohistochemistry showed loss of the mutated protein. Conclusion Our findings suggest that missense MMR gene mutations are common in HNPCC and that germline MMR mutations are also found in patients with IVISI-negative tumors.
40.	Smeds, Henrik, et al. (author) X-linked Malformation Deafness : Neurodevelopmental Symptoms Are Common in Children With IP3 Malformation and Mutation in POU3F4 2022 In: Ear and Hearing. - : Lippincott, Williams & Wilkins. - 0196-0202 .- 1538-4667. ; 43:1, s. 53-69 Journal article (peer-reviewed)abstract Objective: Incomplete partition type 3 (IP3) malformation deafness is a rare hereditary cause of congenital or rapid progressive hearing loss. The children present with a severe to profound mixed hearing loss and temporal bone imaging show a typical inner ear malformation classified as IP3. Cochlear implantation is one option of hearing restoration in severe cases. Little is known about other specific difficulties these children might exhibit, for instance possible neurodevelopmental symptoms.Material and methods: Ten 2; 0 to 9; 6-year-old children with IP3 malformation deafness (nine boys and one girl) with cochlear implants were evaluated with a retrospective chart review in combination with an additional extensive multidisciplinary assessment day. Hearing, language, cognition, and mental ill-health were compared with a control group of ten 1; 6 to 14; 5-year-old children with cochlear implants (seven boys and three girls) with another genetic cause of deafness, mutations in the GJB2 gene.Results: Mutations in POU3F4 were found in nine of the 10 children with IP3 malformation. Children with IP3 malformation deafness had an atypical outcome with low level of speech recognition (especially in noise), executive functioning deficits, delayed or impaired speech as well as atypical lexical-semantic and pragmatic abilities, and exhibited mental ill-health issues. Parents of children with IP3 malformation were more likely to report that they were worried about their child’s psychosocial wellbeing. Controls, however, had more age-typical results in all these domains. Eight of 10 children in the experimental group had high nonverbal cognitive ability despite their broad range of neurodevelopmental symptoms.Conclusions: While cochlear implantation is a feasible alternative for children with IP3 malformation deafness, co-occurring neurodevelopmental anomalies, such as attention deficit hyperactivity or developmental language disorder, and mental ill-health issues require an extensive and consistent multidisciplinary team approach during childhood to support their overall habilitation.
41.	Soderhall, Cilla, et al. (author) A Case with Bladder Exstrophy and Unbalanced X Chromosome Rearrangement 2014 In: European Journal of Pediatric Surgery. - : Georg Thieme Verlag KG. - 1439-359X .- 0939-7248. ; 24:4, s. 353-359 Journal article (peer-reviewed)abstract Introduction Bladder exstrophy is a rare congenital malformation of the bladder and is believed to be a complex disorder with genetic and environmental background. We describe a young adult female with an isolated bladder exstrophy and with an X chromosome aberration. Patients and Methods Karyotyping identified an X chromosome rearrangement that was further characterized with array comparative genomic hybridization (CGH) and confirmed by multiplex ligation-dependent probe amplification and fluorescence in situ hybridization (FISH) analysis. Results The identified X chromosome rearrangement in our index patient consists of a gain of chromosomal material in region Xq26.3-> qter and loss in region Xp22.12->pter. This aberration was also carried by her mother and sister, none with bladder exstrophy. All three have a disproportionate short stature, as expected due to the deletion of one of the copies of the SHOX gene on Xp22.3. X-inactivation studies revealed a complete skewed inactivation pattern in carriers. Crossover events in the maternal germline furthermore resulted in different genetic material on the rearranged X chromosome between the index patient and her sister. Conclusion Our findings suggest an X-linked genetic risk factor for bladder exstrophy.
42.	Tesi, Bianca, et al. (author) Diagnostic yield and clinical impact of germline sequencing in children with CNS and extracranial solid tumors : a nationwide, prospective Swedish study 2024 In: The Lancet Regional Health. - : Elsevier. - 2666-7762. ; 39 Journal article (peer-reviewed)abstract BackgroundChildhood cancer predisposition (ChiCaP) syndromes are increasingly recognized as contributing factors to childhood cancer development. Yet, due to variable availability of germline testing, many children with ChiCaP might go undetected today. We report results from the nationwide and prospective ChiCaP study that investigated diagnostic yield and clinical impact of integrating germline whole-genome sequencing (gWGS) with tumor sequencing and systematic phenotyping in children with solid tumors.MethodsgWGS was performed in 309 children at diagnosis of CNS (n = 123, 40%) or extracranial (n = 186, 60%) solid tumors and analyzed for disease-causing variants in 189 known cancer predisposing genes. Tumor sequencing data were available for 74% (227/309) of patients. In addition, a standardized clinical assessment for underlying predisposition was performed in 95% (293/309) of patients.FindingsThe prevalence of ChiCaP diagnoses was 11% (35/309), of which 69% (24/35) were unknown at inclusion (diagnostic yield 8%, 24/298). A second-hit and/or relevant mutational signature was observed in 19/21 (90%) tumors with informative data. ChiCaP diagnoses were more prevalent among patients with retinoblastomas (50%, 6/12) and high-grade astrocytomas (37%, 6/16), and in those with non-cancer related features (23%, 20/88), and ≥2 positive ChiCaP criteria (28%, 22/79). ChiCaP diagnoses were autosomal dominant in 80% (28/35) of patients, yet confirmed de novo in 64% (18/28). The 35 ChiCaP findings resulted in tailored surveillance (86%, 30/35) and treatment recommendations (31%, 11/35).InterpretationOverall, our results demonstrate that systematic phenotyping, combined with genomics-based diagnostics of ChiCaP in children with solid tumors is feasible in large-scale clinical practice and critically guides personalized care in a sizable proportion of patients.
43.	Tesi, Bianca, et al. (author) Diagnostic yield and clinical impact of germline sequencing in children with CNS and extracranial solid tumors : a nationwide, prospective Swedish study 2024 In: The Lancet Regional Health. - : Elsevier. - 2666-7762. ; 39 Journal article (peer-reviewed)abstract Background: Childhood cancer predisposition (ChiCaP) syndromes are increasingly recognized as contributing factors to childhood cancer development. Yet, due to variable availability of germline testing, many children with ChiCaP might go undetected today. We report results from the nationwide and prospective ChiCaP study that investigated diagnostic yield and clinical impact of integrating germline whole-genome sequencing (gWGS) with tumor sequencing and systematic phenotyping in children with solid tumors.Methods: gWGS was performed in 309 children at diagnosis of CNS (n = 123, 40%) or extracranial (n = 186, 60%) solid tumors and analyzed for disease-causing variants in 189 known cancer predisposing genes. Tumor sequencing data were available for 74% (227/309) of patients. In addition, a standardized clinical assessment for underlying predisposition was performed in 95% (293/309) of patients.Findings: The prevalence of ChiCaP diagnoses was 11% (35/309), of which 69% (24/35) were unknown at inclusion (diagnostic yield 8%, 24/298). A second-hit and/or relevant mutational signature was observed in 19/21 (90%) tumors with informative data. ChiCaP diagnoses were more prevalent among patients with retinoblastomas (50%, 6/12) and high-grade astrocytomas (37%, 6/16), and in those with non-cancer related features (23%, 20/88), and ≥2 positive ChiCaP criteria (28%, 22/79). ChiCaP diagnoses were autosomal dominant in 80% (28/35) of patients, yet confirmed de novo in 64% (18/28). The 35 ChiCaP findings resulted in tailored surveillance (86%, 30/35) and treatment recommendations (31%, 11/35).Interpretation: Overall, our results demonstrate that systematic phenotyping, combined with genomics-based diagnostics of ChiCaP in children with solid tumors is feasible in large-scale clinical practice and critically guides personalized care in a sizable proportion of patients.Funding: The study was supported by the Swedish Childhood Cancer Fund and the Ministry of Health and Social Affairs.
44.	Tham, Emma, et al. (author) A novel phenotype in N-glycosylation disorders: Gillessen-Kaesbach-Nishimura skeletal dysplasia due to pathogenic variants in ALG9. 2015 In: European Journal of Human Genetics. - : Springer Science and Business Media LLC. - 1476-5438 .- 1018-4813. Journal article (peer-reviewed)abstract A rare lethal autosomal recessive syndrome with skeletal dysplasia, polycystic kidneys and multiple malformations was first described by Gillessen-Kaesbach et al and subsequently by Nishimura et al. The skeletal features uniformly comprise a round pelvis, mesomelic shortening of the upper limbs and defective ossification of the cervical spine. We studied two unrelated families including three affected fetuses with Gillessen-Kaesbach-Nishimura syndrome using whole-exome and Sanger sequencing, comparative genome hybridization and homozygosity mapping. All affected patients were shown to have a novel homozygous splice variant NM_024740.2: c.1173+2T>A in the ALG9 gene, encoding alpha-1,2-mannosyltransferase, involved in the formation of the lipid-linked oligosaccharide precursor of N-glycosylation. RNA analysis demonstrated skipping of exon 10, leading to shorter RNA. Mass spectrometric analysis showed an increase in monoglycosylated transferrin as compared with control tissues, confirming that this is a congenital disorder of glycosylation (CDG). Only three liveborn children with ALG9-CDG have been previously reported, all with missense variants. All three suffered from intellectual disability, muscular hypotonia, microcephaly and renal cysts, but none had skeletal dysplasia. Our study shows that some pathogenic variants in ALG9 can present as a lethal skeletal dysplasia with visceral malformations as the most severe phenotype. The skeletal features overlap with that previously reported for ALG3- and ALG12-CDG, suggesting that this subset of glycosylation disorders constitutes a new diagnostic group of skeletal dysplasias.European Journal of Human Genetics advance online publication, 13 May 2015; doi:10.1038/ejhg.2015.91.
45.	Timms, Kirsten M, et al. (author) Molecular and phenotypic variation in patients with severe Hunter syndrome 1997 In: Human Molecular Genetics. - : Oxford University Press (OUP). - 0964-6906 .- 1460-2083. ; 6:3, s. 479-486 Journal article (peer-reviewed)abstract Severe Hunter syndrome is a fatal X-linked lysosomal storage disorder caused by iduronate-2-sulphatase (IDS) deficiency. Patients with complete deletion of the IDS locus often have atypical phenotypes including ptosis, obstructive sleep apnoea, and the occurrence of seizures. We have used genomic DNA sequencing to identify several new genes in the IDS region. DNA deletion patients with atypical symptoms have been analysed to determine whether these atypical symptoms could be due to involvement of these other loci. The occurrence of seizures in two individuals correlated with a deletion extending proximal of IDS, up to and including part of the FMR2 locus. Other (non-seizure) symptoms were associated with distal deletions. In addition, a group of patients with no variant symptoms, and a characteristic rearrangement involving a recombination between the IDS gene and an adjacent IDS pseudogene (IDS psi), showed normal expression of loci distal to IDS. Together, these results identify FMR2 as a candidate gene for seizures, when mutated along with IDS.
46.	Timms, Kirsten, et al. (author) Phenotypic variation in patients with severe Hunter syndrome 1996 In: Am. J. Hum. Genet.. ; 59, s. 210- Review (other academic/artistic)
47.	Vandrovcova, Jana, et al. (author) Somatic BRAF-V600E Mutations in Familial Colorectal Cancer 2006 In: Cancer Epidemiology, Biomarkers and Prevention. - 1055-9965 .- 1538-7755. ; 15:11, s. 2270-2273 Journal article (peer-reviewed)abstract The BRAF gene is mutated in 4% to 12% of unselected colorectal cancers, particularly those with high microsatellite instability and in premalignant lesions, such as serrated adenomas and hyperplastic polyps. However, it has been shown that activating BRAF mutations are almost never found in tumors from hereditary nonpolyposis colorectal cancer patients. To evaluate the role of oncogenic BRAF mutations in non-hereditary nonpolyposis colorectal cancer/ non-familial adenomatous polyposis familial colorectal cancer, we did a mutation screening of the most common BRAT mutation, the V600E mutation, in 194 colorectal tumors from patients with a positive family history of the disease. The BRAF-V600E mutation was identified in 100% (8 of 8) of microsatellite-unstable tumors and in 9.7% (18 of 186) of microsatellite-stable tumors. Interestingly, families with extracolonic tumors showed a much higher mutation frequency (17.5%) compared with families with colonic cancer only (3.5%; P = 0.009). In addition, we studied colonoscopic results from 448 family members who had been under colonoscopic surveillance for several years. Subjects from families where the V600E mutation was identified had less adenomas compared with those from families where no BRAT mutation had been found (odds ratio, 8.5; 95% confidence interval, 1.1-64.6). These findings indicate that adenomas might be less important in the cancer development in the group of families with BRAF-V600E mutations and indirectly support a previous hypothesis that tumors might develop through the yperplastic polyp-serrated adenoma pathway. In conclusion, our results suggest that BRAF-V600E mutations are mainly involved in colorectal. cancer families characterized by an increased risk of other common malignancies.
48.	von Salomé, Jenny, et al. (author) Genetic anticipation in Swedish Lynch syndrome families 2017 In: PLoS Genetics. - : Public Library of Science (PLoS). - 1553-7390 .- 1553-7404. ; 13:10 Journal article (peer-reviewed)abstract Among hereditary colorectal cancer predisposing syndromes, Lynch syndrome (LS) caused by mutations in DNA mismatch repair genes MLH1, MSH2, MSH6 or PMS2 is the most common. Patients with LS have an increased risk of early onset colon and endometrial cancer, but also other tumors that generally have an earlier onset compared to the general population. However, age at first primary cancer varies within families and genetic anticipation, i.e. decreasing age at onset in successive generations, has been suggested in LS. Anticipation is a well-known phenomenon in e.g neurodegenerative diseases and several reports have studied anticipation in heritable cancer. The purpose of this study is to determine whether anticipation can be shown in a large cohort of Swedish LS families referred to the regional departments of clinical genetics in Lund, Stockholm, Linköping, Uppsala and Umeå between the years 1990–2013. We analyzed a homogenous group of mutation carriers, utilizing information from both affected and non-affected family members. In total, 239 families with a mismatch repair gene mutation (96 MLH1 families, 90 MSH2 families including one family with an EPCAM–MSH2 deletion, 39 MSH6 families, 12 PMS2 families, and 2 MLH1+PMS2 families) comprising 1028 at-risk carriers were identified among the Swedish LS families, of which 1003 mutation carriers had available follow-up information and could be included in the study. Using a normal random effects model (NREM) we estimate a 2.1 year decrease in age of diagnosis per generation. An alternative analysis using a mixed-effects Cox proportional hazards model (COX-R) estimates a hazard ratio of exp(0.171), or about 1.19, for age of diagnosis between consecutive generations. LS-associated gene-specific anticipation effects are evident for MSH2 (2.6 years/generation for NREM and hazard ratio of 1.33 for COX-R) and PMS2 (7.3 years/generation and hazard ratio of 1.86). The estimated anticipation effects for MLH1 and MSH6 are smaller.
49.	Wadensten, Elisabeth, et al. (author) Diagnostic Yield From a Nationwide Implementation of Precision Medicine for all Children With Cancer. 2023 In: JCO precision oncology. - : American Society of Clinical Oncology. - 2473-4284. ; 7 Journal article (peer-reviewed)abstract Several studies have indicated that broad genomic characterization of childhood cancer provides diagnostically and/or therapeutically relevant information in selected high-risk cases. However, the extent to which such characterization offers clinically actionable data in a prospective broadly inclusive setting remains largely unexplored.We implemented prospective whole-genome sequencing (WGS) of tumor and germline, complemented by whole-transcriptome sequencing (RNA-Seq) for all children diagnosed with a primary or relapsed solid malignancy in Sweden. Multidisciplinary molecular tumor boards were set up to integrate genomic data in the clinical decision process along with a medicolegal framework enabling secondary use of sequencing data for research purposes.During the study's first 14 months, 118 solid tumors from 117 patients were subjected to WGS, with complementary RNA-Seq for fusion gene detection in 52 tumors. There was no significant geographic bias in patient enrollment, and the included tumor types reflected the annual national incidence of pediatric solid tumor types. Of the 112 tumors with somatic mutations, 106 (95%) exhibited alterations with a clear clinical correlation. In 46 of 118 tumors (39%), sequencing only corroborated histopathological diagnoses, while in 59 cases (50%), it contributed to additional subclassification or detection of prognostic markers. Potential treatment targets were found in 31 patients (26%), most commonly ALK mutations/fusions (n = 4), RAS/RAF/MEK/ERK pathway mutations (n = 14), FGFR1 mutations/fusions (n = 5), IDH1 mutations (n = 2), and NTRK2 gene fusions (n = 2). In one patient, the tumor diagnosis was revised based on sequencing. Clinically relevant germline variants were detected in 8 of 94 patients (8.5%).Up-front, large-scale genomic characterization of pediatric solid malignancies provides diagnostically valuable data in the majority of patients also in a largely unselected cohort.
50.	Wadensten, Elisabeth, et al. (author) Diagnostic Yield From a Nationwide Implementation of Precision Medicine for all Children With Cancer 2023 In: JCO Precision Oncology. - : American Society of Clinical Oncology. - 2473-4284. ; :7 Journal article (peer-reviewed)abstract Purpose: Several studies have indicated that broad genomic characterization of childhood cancer provides diagnostically and/or therapeutically relevant information in selected high-risk cases. However, the extent to which such characterization offers clinically actionable data in a prospective broadly inclusive setting remains largely unexplored.Methods: We implemented prospective whole-genome sequencing (WGS) of tumor and germline, complemented by whole-transcriptome sequencing (RNA-Seq) for all children diagnosed with a primary or relapsed solid malignancy in Sweden. Multidisciplinary molecular tumor boards were set up to integrate genomic data in the clinical decision process along with a medicolegal framework enabling secondary use of sequencing data for research purposes.Results: During the study's first 14 months, 118 solid tumors from 117 patients were subjected to WGS, with complementary RNA-Seq for fusion gene detection in 52 tumors. There was no significant geographic bias in patient enrollment, and the included tumor types reflected the annual national incidence of pediatric solid tumor types. Of the 112 tumors with somatic mutations, 106 (95%) exhibited alterations with a clear clinical correlation. In 46 of 118 tumors (39%), sequencing only corroborated histopathological diagnoses, while in 59 cases (50%), it contributed to additional subclassification or detection of prognostic markers. Potential treatment targets were found in 31 patients (26%), most commonly ALK mutations/fusions (n = 4), RAS/RAF/MEK/ERK pathway mutations (n = 14), FGFR1 mutations/fusions (n = 5), IDH1 mutations (n = 2), and NTRK2 gene fusions (n = 2). In one patient, the tumor diagnosis was revised based on sequencing. Clinically relevant germline variants were detected in 8 of 94 patients (8.5%).Conclusion: Up-front, large-scale genomic characterization of pediatric solid malignancies provides diagnostically valuable data in the majority of patients also in a largely unselected cohort.

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