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Sökning: LAR1:gu > Blennow Kaj 1958 > Pedersen Nancy L. > Göteborgs universitet > Reynolds Chandra A

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  • Bennet, Anna M, et al. (författare)
  • Genetic association of sequence variants near AGER/NOTCH4 and dementia.
  • 2011
  • Ingår i: Journal of Alzheimer's disease : JAD. - 1875-8908. ; 24:3, s. 475-84
  • Tidskriftsartikel (refereegranskat)abstract
    • We performed a survey of sequence variation in a series of 20 genes involved in inflammation-related pathways for association with dementia risk in twin and unrelated case-control samples consisting in total of 1462 Swedish dementia casesand 1929 controls. For a total of 218 tested genetic markers, strong evidence was obtained implicating a region near AGER and NOTCH4 on chromosome 6p with replication across both samples and maximum combined significance at marker rs1800625 (OR = 1.37, 95% CI 1.19–1.56, p = 1.36×10(–6)). Imputation of the associated genomic interval provided an improved signal atrs8365, near the 3UTR of AGER (p = 7.34×10(–7)). The associated region extends 120 kb encompassing 11 candidate genes.While AGER encodes a key receptor for amyloid-? protein, an analysis of network context based upon genes now confirmed to contribute to dementia risk (A?PP, PSEN1, PSEN2, CR1, CLU, PICALM, and APOE) suggested strong functional coupling to NOTCH4, with no significant coupling to the remaining candidates. The implicated region occurs in the broad HLA locus on chromosome 6p, but associated markers were not in strong LD with known variants that regulate HLA gene function, suggesting that this may represent a signal distinct from immune-system pathways.
  • Reynolds, Chandra A, et al. (författare)
  • Sequence variation in SORL1 and dementia risk in Swedes.
  • 2010
  • Ingår i: Neurogenetics. - 1364-6753. ; 11:1, s. 139-42
  • Tidskriftsartikel (refereegranskat)abstract
    • The gene encoding the neuronal sortilin-related receptor SORL1 has been claimed to be associated with Alzheimer's disease (AD) by independent groups and across various human populations. We evaluated six genetic markers in SORL1 in a sample of 1,558 Swedish dementia cases (including 1,270 AD cases) and 2,179 controls. For both single-marker-based and haplotype-based analyses, we found no strong support for SORL1 as a dementia or AD risk-modifying gene in our sample in isolation nor did we observe association with AD/dementia-related traits, including cerebrospinal fluid beta-amyloid(1-42), tau levels, or age at onset. However, meta-analyses of markers in this study together with previously published studies on SORL1 encompassing in excess of 13,000 individuals does suggest significant association with AD (best odds ratio = 1.097; 95% confidence interval = 1.038-1.158, p = 0.001). All six markers were significant in meta-analyses and it is notable that they occur in two distinct linkage disequilibrium blocks. These data are consistent with either allelic heterogeneity or the existence of as yet untested functional variants and these will be important considerations in further attempts to evaluate the importance of sequence variation in SORL1 with AD risk.
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