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- Arzoo, Pakeeza Shaiq, et al.
(författare)
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WNT10A Mutations Account for 1/4 of Population- Based Isolated Oligodontia and Show Phenotypic Correlations
- 2014
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Ingår i: American Journal of Medical Genetics. Part A. - : Wiley. - 1552-4825 .- 1552-4833. ; 164:2, s. 353-359
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Tidskriftsartikel (refereegranskat)abstract
- A large proportion (>50%) of patients with isolated oligodontia were recently reported with WNT10A mutations. We have analyzed a population-based cohort of 102 individuals diagnosed with non-syndromic oligodontia and a mean of 8.2 missing teeth. The cohort included 94 families and screening of WNT10A identified that 26 probands (27.7%) had at least one WNT10A variant. When we included the MSX1, PAX9, AXIN2, EDA, EDAR, and EDARADD genes, 38.3% of probands were positive for a mutation. Biallelic WNT10A mutations were strongly associated with a larger number of missing teeth (11.09) when compared to both monoallelic WNT10 mutations (6.82) and the group without mutations in WNT10A, MSX1, PAX9, AXIN2, EDA, EDAR, or EDARADD (7.77). Genotype-phenotype analysis of individuals with WNT10A mutations showed that premolars were the most common missing teeth. Furthermore, biallelic WNT10A mutations were associated with absence of maxillary and mandibular molars as well as mandibular central incisors. Maxillary central incisors were always present. Thus, our study indicates that WNT10A mutations are associated with both the type and numbers of missing teeth. Furthermore, we show that this population-based cohort of isolated oligodontia had a considerably lower frequency of mutated WNT10A alleles and a lower mean number of missing teeth when compared to patients recruited from dental specialist centers. (c) 2013 Wiley Periodicals, Inc.
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- Bergendal, Birgitta, et al.
(författare)
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Isolated Oligodontia Associated With Mutations in EDARADD, AXIN2, MSX1, and PAX9 Genes
- 2011
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Ingår i: American Journal of Medical Genetics Part A. - : Wiley. - 1552-4825 .- 1552-4833. ; 155:7, s. 1616-1622
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Tidskriftsartikel (refereegranskat)abstract
- Oligodontia is defined as the congenital lack of six or more permanent teeth, excluding third molars. Oligodontia as well as hypodontia (lack of one or more permanent teeth) are highly heritable conditions associated with mutations in the AXIN2, MSX1, PAX9, EDA, and EDAR genes. Here we define the prevalence of mutations in the AXIN2, MSX1, PAX9, EDA, and EDAR genes, and the novel candidate gene EDARADD in a cohort of 93 Swedish probands with non-syndromic, isolated oligodontia. Mutation screening was performed using denaturing gradient gel electrophoresis and DNA sequence analysis. Analyses of the coding sequences of the six genes showed sequence alterations predicted to be damaging or potentially damaging in ten of 93 probands (10.8%). Mutations were identified in the EDARADD (n = 1), AXIN2 (n = 3), MSX1 (n = 2), and PAX9 (n = 4) genes, respectively. None of the 10 probands with mutations had other self-reported symptoms from ectodermal tissues. The oral parameters were similar when comparing individuals with and without mutations but a family history of oligodontia was three times more frequent for probands with mutations. EDARADD mutations have previously been reported in a few families segregating hypohidrotic ectodermal dysplasia and this is, to our knowledge, the first report of an EDARADD mutation associated with isolated oligodontia.
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- Björk, Aron H., et al.
(författare)
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Antibody deficiency in adults with 22q11.2 deletion syndrome.
- 2012
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Ingår i: American journal of medical genetics. Part A. - : Wiley. - 1552-4833 .- 1552-4825. ; 158A:8, s. 1934-1940
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Tidskriftsartikel (refereegranskat)abstract
- There are limited data on immunological disorders, infection profile, and autoimmunity among adults with the 22q11.2 deletion syndrome (22q11.2DS) in the literature. To expand this knowledge base, we evaluated immunoglobulin levels, lymphocyte subsets, and T-cell function in 26 adults, consecutively referred to our 22q11.2DS multidisciplinary team. Their medical records were also reviewed with respect to frequency and severity of infections and autoimmune disorders. Six patients had low immunoglobulin levels; among these patients, one had a combined IgA and IgG1 deficiency, one had an isolated IgG3 deficiency, and four had a profound antibody deficiency comparable to common variable immunodeficiency (CVID). Three of the patients with profound antibody deficiency showed signs of reduced T-cell function measured as a low response to mitogen and/or antigen stimulation. The four patients with profound antibody deficiency suffered from more severe infections than the rest of the patient group. Three of them also had a history of both immune thrombocytopenia (ITP) and autoimmune hemolytic anemia (AHA). Our results suggest that a subgroup of individuals with 22q11.2DS can develop a severe antibody deficiency associated with lower respiratory tract infections and autoimmune conditions. Early diagnosis of hypogammaglobulinemia among these individuals is important in order to provide optimal treatment. We therefore recommend an immunological evaluation and follow-up among adults with 22q11.2DS who have a history of autoimmune conditions or recurrent infections. © 2012 Wiley Periodicals, Inc.
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- Boström, Katrin, et al.
(författare)
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Living with a hereditary disease : persons with muscular dystrophy and their next of kin.
- 2005
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Ingår i: American Journal of Medical Genetics. - Hoboken, N.J. : Wiley-Liss. - 0148-7299 .- 1096-8628 .- 1552-4825 .- 1552-4833. ; 136A:1, s. 17-24
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Tidskriftsartikel (refereegranskat)abstract
- This qualitative study describes conceptions and experiences of the hereditary aspect of muscular dystrophy (MD) from both the patients' and the next of kin's perspective. Different diagnoses of MD are included: dystrophia myotonica, myopathia distalis tarda hereditaria, Becker MD, facioscapulohumeral MD, limb-girdle MD, Emery-Dreifuss and undetermined proximal MD (Duchenne MD is not included). Interviews were conducted with 46 persons with MD and 36 next of kin. The interviews were subjected to inductive content analysis. Only two in each group did not spontaneously mention anything related to the fact that MD is disease with dominant or recessive inheritance. It was found that heredity has a prominent place in the thoughts and feelings of the family. These thoughts were classified as Becoming aware of MD and its hereditary nature, looking into the pedigree, acquiring an understanding of MD, thoughts about genetic testing, interpreting the risk, whether to have children or not, feelings related to the future, and feelings of responsibility and guilt. Families with MD need medical information and the opportunity for genetic testing as well as support and counseling in coming to terms with living with a hereditary disease, whether or not that includes a decision to take a test.
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- Carfi, Angelo, et al.
(författare)
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The burden of chronic disease, multimorbidity, and polypharmacy in adults with Down syndrome
- 2020
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Ingår i: American Journal of Medical Genetics. Part A. - : Wiley. - 1552-4825 .- 1552-4833. ; 182:7, s. 1735-1743
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Tidskriftsartikel (refereegranskat)abstract
- Data on clinical characteristics of adults with Down syndrome (DS) are limited and the clinical phenotype of these persons is poorly described. This study aimed to describe the occurrence of chronic diseases and pattern of medication use in a population of adults with DS. Participants were 421 community dwelling adults with DS, aged 18 years or older. Individuals were assessed through a standardized clinical protocol. Multimorbidity was defined as the occurrence of two or more chronic conditions and polypharmacy as the concomitant use of five or more medications. The mean age of study participants was 38.3 +/- 12.8 years and 214 (51%) were women. Three hundred and seventy-four participants (88.8%) presented with multimorbidity. The most prevalent condition was visual impairment (72.9%), followed by thyroid disease (50.1%) and hearing impairment (26.8%). Chronic diseases were more prevalent among participants aged >40 years. The mean number of medications used was 2.09 and polypharmacy was observed in 10.5% of the study sample. Psychotropic medications were used by a mean of 0.7 individuals of the total sample. The high prevalence of multimorbidity and the common use of multiple medications contributes to a high level of clinical complexity, which appears to be similar to the degree of complexity of the older non-trisomic population. A comprehensive and holistic approach, commonly adopted in geriatric medicine, may provide the most appropriate care to persons with DS as they grow into adulthood.
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