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Sökning: WFRF:(Lachance Daniel H.)

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1.
  • Stacey, Simon N, et al. (författare)
  • A germline variant in the TP53 polyadenylation signal confers cancer susceptibility.
  • 2011
  • Ingår i: Nature Genetics. - 1061-4036 .- 1546-1718. ; 43:11, s. 1098-103
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>To identify new risk variants for cutaneous basal cell carcinoma, we performed a genome-wide association study of 16 million SNPs identified through whole-genome sequencing of 457 Icelanders. We imputed genotypes for 41,675 Illumina SNP chip-typed Icelanders and their relatives. In the discovery phase, the strongest signal came from rs78378222[C] (odds ratio (OR) = 2.36, P = 5.2 × 10(-17)), which has a frequency of 0.0192 in the Icelandic population. We then confirmed this association in non-Icelandic samples (OR = 1.75, P = 0.0060; overall OR = 2.16, P = 2.2 × 10(-20)). rs78378222 is in the 3' untranslated region of TP53 and changes the AATAAA polyadenylation signal to AATACA, resulting in impaired 3'-end processing of TP53 mRNA. Investigation of other tumor types identified associations of this SNP with prostate cancer (OR = 1.44, P = 2.4 × 10(-6)), glioma (OR = 2.35, P = 1.0 × 10(-5)) and colorectal adenoma (OR = 1.39, P = 1.6 × 10(-4)). However, we observed no effect for breast cancer, a common Li-Fraumeni syndrome tumor (OR = 1.06, P = 0.57, 95% confidence interval 0.88-1.27).</p>
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2.
  • Barban, Nicola, et al. (författare)
  • Genome-wide analysis identifies 12 loci influencing human reproductive behavior
  • 2016
  • Ingår i: Nature genetics. - 1546-1718. ; 48:12, s. 1462-1472
  • Tidskriftsartikel (refereegranskat)abstract
    • The genetic architecture of human reproductive behavior—age at first birth (AFB) and number of children ever born (NEB)—has a strong relationship with fitness, human development, infertility and risk of neuropsychiatric disorders. However, very few genetic loci have been identified, and the underlying mechanisms of AFB and NEB are poorly understood. We report a large genome-wide association study of both sexes including 251,151 individuals for AFB and 343,072 individuals for NEB. We identified 12 independent loci that are significantly associated with AFB and/or NEB in a SNP-based genome-wide association study and 4 additional loci associated in a gene-based effort. These loci harbor genes that are likely to have a role, either directly or by affecting non-local gene expression, in human reproduction and infertility, thereby increasing understanding of these complex traits.
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3.
  • Ligthart, Symen, et al. (författare)
  • Genome Analyses of &gt;200,000 Individuals Identify 58 Loci for Chronic Inflammation and Highlight Pathways that Link Inflammation and Complex Disorders
  • 2018
  • Ingår i: American Journal of Human Genetics. - 0002-9297 .- 1537-6605. ; 103:5, s. 691-706
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>C-reactive protein (CRP) is a sensitive biomarker of chronic low-grade inflammation and is associated with multiple complex diseases. The genetic determinants of chronic inflammation remain largely unknown, and the causal role of CRP in several clinical outcomes is debated. We performed two genome-wide association studies (GWASs), on HapMap and 1000 Genomes imputed data, of circulating amounts of CRP by using data from 88 studies comprising 204,402 European individuals. Additionally, we performed in silico functional analyses and Mendelian randomization analyses with several clinical outcomes. The GWAS meta-analyses of CRP revealed 58 distinct genetic loci (p &lt; 5 × 10<sup>-8</sup>). After adjustment for body mass index in the regression analysis, the associations at all except three loci remained. The lead variants at the distinct loci explained up to 7.0% of the variance in circulating amounts of CRP. We identified 66 gene sets that were organized in two substantially correlated clusters, one mainly composed of immune pathways and the other characterized by metabolic pathways in the liver. Mendelian randomization analyses revealed a causal protective effect of CRP on schizophrenia and a risk-increasing effect on bipolar disorder. Our findings provide further insights into the biology of inflammation and could lead to interventions for treating inflammation and its clinical consequences.</p>
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5.
  • Andersson, Ulrika, et al. (författare)
  • Germline rearrangements in families with strong family history of glioma and malignant melanoma, colon, and breast cancer
  • 2014
  • Ingår i: Neuro-Oncology. - Oxford University Press. - 1522-8517 .- 1523-5866. ; 16:10, s. 1333-1340
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Background: Although familial susceptibility to glioma is known, the genetic basis for this susceptibility remains unidentified in the majority of glioma-specific families. An alternative approach to identifying such genes is to examine cancer pedigrees, which include glioma as one of several cancer phenotypes, to determine whether common chromosomal modifications might account for the familial aggregation of glioma and other cancers. Methods: Germline rearrangements in 146 glioma families (from the Gliogene Consortium; http://www.gliogene.org/) were examined using multiplex ligation-dependent probe amplification. These families all had at least 2 verified glioma cases and a third reported or verified glioma case in the same family or 2 glioma cases in the family with at least one family member affected with melanoma, colon, or breast cancer. The genomic areas covering TP53, CDKN2A, MLH1, and MSH2 were selected because these genes have been previously reported to be associated with cancer pedigrees known to include glioma. Results: We detected a single structural rearrangement, a deletion of exons 1-6 in MSH2, in the proband of one family with 3 cases with glioma and one relative with colon cancer. Conclusions: Large deletions and duplications are rare events in familial glioma cases, even in families with a strong family history of cancers that may be involved in known cancer syndromes.</p>
6.
  • Andersson, Ulrika, et al. (författare)
  • Germline rearrangements in families with strong family history of glioma and malignant melanoma, colon, and breast cancer.
  • 2014
  • Ingår i: Neuro-Oncology. - Oxford University Press. - 1523-5866. ; 16:10, s. 1333-1340
  • Tidskriftsartikel (refereegranskat)abstract
    • Although familial susceptibility to glioma is known, the genetic basis for this susceptibility remains unidentified in the majority of glioma-specific families. An alternative approach to identifying such genes is to examine cancer pedigrees, which include glioma as one of several cancer phenotypes, to determine whether common chromosomal modifications might account for the familial aggregation of glioma and other cancers.
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7.
  • Berntsson, Shala G., 1964-, et al. (författare)
  • Glioma-related seizures in relation to histopathological subtypes a report from the glioma international case-control study
  • 2018
  • Ingår i: Journal of Neurology. - 0340-5354 .- 1432-1459. ; 265:6, s. 1432-1442
  • Tidskriftsartikel (refereegranskat)abstract
    • <p><strong>BACKGROUND:</strong> The purpose of this study was to evaluate the distribution of glioma-related seizures and seizure control at the time of tumor diagnosis with respect to tumor histologic subtypes, tumor treatment and patient characteristics, and to compare seizure history preceding tumor diagnosis (or study enrollment) between glioma patients and healthy controls.</p><p><strong>METHODS:</strong> The Glioma International Case Control study (GICC) risk factor questionnaire collected information on demographics, past medical/medication history, and occupational history. Cases from eight centers were also asked detailed questions on seizures in relation to glioma diagnosis; cases (n = 4533) and controls (n = 4171) were also asked about seizures less than 2 years from diagnosis and previous seizure history more than 2 years prior to tumor diagnosis, including childhood seizures.</p><p><strong>RESULTS:</strong> Low-grade gliomas (LGGs), particularly oligodendrogliomas/oligoastrocytomas, had the highest proportion of glioma-related seizures. Patients with low-grade astrocytoma demonstrated the most medically refractory seizures. A total of 83% of patients were using only one antiepileptic drug (AED), which was levetiracetam in 71% of cases. Gross total resection was strongly associated with reduced seizure frequency (p &lt; 0.009). No significant difference was found between glioma cases and controls in terms of seizure occurring more than 2 years before diagnosis or during childhood.</p><p><strong>CONCLUSIONS:</strong> Our study showed that glioma-related seizures were most common in low-grade gliomas. Gross total resection was associated with lower seizure frequency. Additionally, having a history of childhood seizures is not a risk factor ***for developing glioma-related seizures or glioma.</p>
8.
  • Berntsson, Shala G., et al. (författare)
  • Glioma-related seizures in relation to histopathological subtypes a report from the glioma international case-control study
  • 2018
  • Ingår i: Journal of Neurology. - Springer. - 0340-5354 .- 1432-1459. ; 265:6, s. 1432-1442
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Background: The purpose of this study was to evaluate the distribution of glioma-related seizures and seizure control at the time of tumor diagnosis with respect to tumor histologic subtypes, tumor treatment and patient characteristics, and to compare seizure history preceding tumor diagnosis (or study enrollment) between glioma patients and healthy controls.</p><p>Methods: The Glioma International Case Control study (GICC) risk factor questionnaire collected information on demographics, past medical/medication history, and occupational history. Cases from eight centers were also asked detailed questions on seizures in relation to glioma diagnosis; cases (n = 4533) and controls (n = 4171) were also asked about seizures less than 2 years from diagnosis and previous seizure history more than 2 years prior to tumor diagnosis, including childhood seizures.</p><p>Results: Low-grade gliomas (LGGs), particularly oligodendrogliomas/oligoastrocytomas, had the highest proportion of glioma-related seizures. Patients with low-grade astrocytoma demonstrated the most medically refractory seizures. A total of 83% of patients were using only one antiepileptic drug (AED), which was levetiracetam in 71% of cases. Gross total resection was strongly associated with reduced seizure frequency (p &lt; 0.009). No significant difference was found between glioma cases and controls in terms of seizure occurring more than 2 years before diagnosis or during childhood.</p><p>Conclusions: Our study showed that glioma-related seizures were most common in low-grade gliomas. Gross total resection was associated with lower seizure frequency. Additionally, having a history of childhood seizures is not a risk factor ***for developing glioma-related seizures or glioma.</p>
9.
  • Berntsson, Shala G, et al. (författare)
  • Glioma-related seizures in relation to histopathological subtypes: a report from the glioma international case-control study.
  • 2018
  • Ingår i: Journal of neurology. - 1432-1459. ; 265:6
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of this study was to evaluate the distribution of glioma-related seizures and seizure control at the time of tumor diagnosis with respect to tumor histologic subtypes, tumor treatment and patient characteristics, and to compare seizure history preceding tumor diagnosis (or study enrollment) between glioma patients and healthy controls.The Glioma International Case Control study (GICC) risk factor questionnaire collected information on demographics, past medical/medication history, and occupational history. Cases from eight centers were also asked detailed questions on seizures in relation to glioma diagnosis; cases (n = 4533) and controls (n = 4171) were also asked about seizures less than 2 years from diagnosis and previous seizure history more than 2 years prior to tumor diagnosis, including childhood seizures.Low-grade gliomas (LGGs), particularly oligodendrogliomas/oligoastrocytomas, had the highest proportion of glioma-related seizures. Patients with low-grade astrocytoma demonstrated the most medically refractory seizures. A total of 83% of patients were using only one antiepileptic drug (AED), which was levetiracetam in 71% of cases. Gross total resection was strongly associated with reduced seizure frequency (p < 0.009). No significant difference was found between glioma cases and controls in terms of seizure occurring more than 2 years before diagnosis or during childhood.Our study showed that glioma-related seizures were most common in low-grade gliomas. Gross total resection was associated with lower seizure frequency. Additionally, having a history of childhood seizures is not a risk factor ***for developing glioma-related seizures or glioma.
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10.
  • Ostrom, Quinn T., et al. (författare)
  • Age‐specific genome‐wide association study in glioblastoma identifies increased proportion of 'lower grade glioma'‐like features associated with younger age
  • 2018
  • Ingår i: International Journal of Cancer. - WILEY. - 0020-7136 .- 1097-0215. ; 143:10, s. 2359-2366
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Glioblastoma (GBM) is the most common malignant brain tumor in the United States. Incidence of GBM increases with age, and younger age‐at‐diagnosis is significantly associated with improved prognosis. While the relationship between candidate GBM risk SNPs and age‐at‐diagnosis has been explored, genome‐wide association studies (GWAS) have not previously been stratified by age. Potential age‐specific genetic effects were assessed in autosomal SNPs for GBM patients using data from four previous GWAS. Using age distribution tertiles (18–53, 54–64, 65+) datasets were analyzed using age‐stratified logistic regression to generate <em>p</em> values, odds ratios (OR), and 95% confidence intervals (95%CI), and then combined using meta‐analysis. There were 4,512 total GBM cases, and 10,582 controls used for analysis. Significant associations were detected at two previously identified SNPs in 7p11.2 (rs723527 [<em>p</em><sub>54–63</sub> = 1.50x10<sup>−9</sup>, OR<sub>54–63</sub> = 1.28, 95%CI<sub>54–63</sub> = 1.18–1.39; <em>p</em><sub>64+</sub> = 2.14x10<sup>−11</sup>, OR<sub>64+</sub> = 1.32, 95%CI<sub>64+</sub> = 1.21–1.43] and rs11979158 [<em>p</em><sub>54–63</sub> = 6.13x10<sup>−8</sup>, OR<sub>54–63</sub> = 1.35, 95%CI<sub>54–63</sub> = 1.21–1.50; <em>p</em><sub>64+</sub> = 2.18x10<sup>−10</sup>, OR<sub>64+</sub> = 1.42, 95%CI<sub>64+</sub> = 1.27–1.58]) but only in persons &gt;54. There was also a significant association at the previously identified lower grade glioma (LGG) risk locus at 8q24.21 (rs55705857) in persons ages 18–53 (<em>p</em><sub>18–53</sub> = 9.30 × 10<sup>−11</sup>, OR<sub>18–53</sub> = 1.76, 95%CI<sub>18–53</sub> = 1.49–2.10). Within The Cancer Genome Atlas (TCGA) there was higher prevalence of ‘LGG’‐like tumor characteristics in GBM samples in those 18–53, with IDH1/2 mutation frequency of 15%, as compared to 2.1% [54–63] and 0.8% [64+] (<em>p</em> = 0.0005). Age‐specific differences in cancer susceptibility can provide important clues to etiology. The association of a SNP known to confer risk for <em>IDH1/2</em> mutant glioma and higher prevalence of <em>IDH1/2</em> mutation within younger individuals 18–53 suggests that more younger individuals may present initially with ‘secondary glioblastoma.’</p>
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