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  • 1
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    Nonsense mutation in the LGR4 gene is associated with several human diseases and other traits (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-05-07
    Description: Low bone mineral density (BMD) is used as a parameter of osteoporosis. Genome-wide association studies of BMD have hitherto focused on BMD as a quantitative trait, yielding common variants of small effects that contribute to the population diversity in BMD. Here we use BMD as a dichotomous trait, searching for variants that may have a direct effect on the risk of pathologically low BMD rather than on the regulation of BMD in the healthy population. Through whole-genome sequencing of Icelandic individuals, we found a rare nonsense mutation within the leucine-rich-repeat-containing G-protein-coupled receptor 4 (LGR4) gene (c.376C〉T) that is strongly associated with low BMD, and with osteoporotic fractures. This mutation leads to termination of LGR4 at position 126 and fully disrupts its function. The c.376C〉T mutation is also associated with electrolyte imbalance, late onset of menarche and reduced testosterone levels, as well as an increased risk of squamous cell carcinoma of the skin and biliary tract cancer. Interestingly, the phenotype of carriers of the c.376C〉T mutation overlaps that of Lgr4 mutant mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Styrkarsdottir, Unnur -- Thorleifsson, Gudmar -- Sulem, Patrick -- Gudbjartsson, Daniel F -- Sigurdsson, Asgeir -- Jonasdottir, Aslaug -- Jonasdottir, Adalbjorg -- Oddsson, Asmundur -- Helgason, Agnar -- Magnusson, Olafur T -- Walters, G Bragi -- Frigge, Michael L -- Helgadottir, Hafdis T -- Johannsdottir, Hrefna -- Bergsteinsdottir, Kristin -- Ogmundsdottir, Margret H -- Center, Jacqueline R -- Nguyen, Tuan V -- Eisman, John A -- Christiansen, Claus -- Steingrimsson, Erikur -- Jonasson, Jon G -- Tryggvadottir, Laufey -- Eyjolfsson, Gudmundur I -- Theodors, Asgeir -- Jonsson, Thorvaldur -- Ingvarsson, Thorvaldur -- Olafsson, Isleifur -- Rafnar, Thorunn -- Kong, Augustine -- Sigurdsson, Gunnar -- Masson, Gisli -- Thorsteinsdottir, Unnur -- Stefansson, Kari -- HL-102923/HL/NHLBI NIH HHS/ -- HL-102924/HL/NHLBI NIH HHS/ -- HL-102925/HL/NHLBI NIH HHS/ -- HL-102926/HL/NHLBI NIH HHS/ -- HL-103010/HL/NHLBI NIH HHS/ -- England -- Nature. 2013 May 23;497(7450):517-20. doi: 10.1038/nature12124. Epub 2013 May 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉deCODE Genetics/Amgen, 101 Reykjavik, Iceland. unnurth@decode.is〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23644456" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Australia ; Biliary Tract Neoplasms/*genetics ; Bone Density/*genetics ; Carcinoma, Squamous Cell/*genetics ; Codon, Nonsense/*genetics ; Denmark ; Down-Regulation/genetics ; Female ; Heterozygote ; Humans ; Iceland ; Male ; Menarche/genetics ; Mice ; Mice, Knockout ; Osteoporotic Fractures/*genetics ; Phenotype ; Receptors, G-Protein-Coupled/chemistry/deficiency/*genetics/metabolism ; Skin Neoplasms/*genetics ; Testosterone/analysis ; Water-Electrolyte Imbalance/*genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    A sequence variant associated with sortilin-1 (SORT1) on 1p13.3 is independently associated with abdominal aortic aneurysm (2013)
    Oxford University Press
    Details
    Publication Date: 2013-06-25
    Description: Abdominal aortic aneurysm (AAA) is a common human disease with a high estimated heritability (0.7); however, only a small number of associated genetic loci have been reported to date. In contrast, over 100 loci have now been reproducibly associated with either blood lipid profile and/or coronary artery disease (CAD) (both risk factors for AAA) in large-scale meta-analyses. This study employed a staged design to investigate whether the loci for these two phenotypes are also associated with AAA. Validated CAD and dyslipidaemia loci underwent screening using the Otago AAA genome-wide association data set. Putative associations underwent staged secondary validation in 10 additional cohorts. A novel association between the SORT1 (1p13.3) locus and AAA was identified. The rs599839 G allele, which has been previously associated with both dyslipidaemia and CAD, reached genome-wide significance in 11 combined independent cohorts (meta-analysis with 7048 AAA cases and 75 976 controls: G allele OR 0.81, 95% CI 0.76–0.85, P = 7.2 x 10 –14 ). Modelling for confounding interactions of concurrent dyslipidaemia, heart disease and other risk factors suggested that this marker is an independent predictor of AAA susceptibility. In conclusion, a genetic marker associated with cardiovascular risk factors, and in particular concurrent vascular disease, appeared to independently contribute to susceptibility for AAA. Given the potential genetic overlap between risk factor and disease phenotypes, the use of well-characterized case–control cohorts allowing for modelling of cardiovascular disease risk confounders will be an important component in the future discovery of genetic markers for conditions such as AAA.
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
    Published by Oxford University Press
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