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Sökning: WFRF:(Mishra Aniket)

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1.
  • Jansen, Iris E, et al. (författare)
  • Genome-wide meta-analysis for Alzheimer's disease cerebrospinal fluid biomarkers.
  • 2022
  • Ingår i: Acta neuropathologica. - : Springer Science and Business Media LLC. - 1432-0533 .- 0001-6322. ; 144:5, s. 821-842
  • Tidskriftsartikel (refereegranskat)abstract
    • Amyloid-beta 42 (Aβ42) and phosphorylated tau (pTau) levels in cerebrospinal fluid (CSF) reflect core features of the pathogenesis of Alzheimer's disease (AD) more directly than clinical diagnosis. Initiated by the European Alzheimer & Dementia Biobank (EADB), the largest collaborative effort on genetics underlying CSF biomarkers was established, including 31 cohorts with a total of 13,116 individuals (discovery n = 8074; replication n = 5042 individuals). Besides the APOE locus, novel associations with two other well-established AD risk loci were observed; CR1 was shown a locus for Aβ42 and BIN1 for pTau. GMNC and C16orf95 were further identified as loci for pTau, of which the latter is novel. Clustering methods exploring the influence of all known AD risk loci on the CSF protein levels, revealed 4 biological categories suggesting multiple Aβ42 and pTau related biological pathways involved in the etiology of AD. In functional follow-up analyses, GMNC and C16orf95 both associated with lateral ventricular volume, implying an overlap in genetic etiology for tau levels and brain ventricular volume.
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2.
  • Larsson, Susanna C, et al. (författare)
  • Serum 25-Hydroxyvitamin D Concentrations and Ischemic Stroke and Its Subtypes.
  • 2018
  • Ingår i: Stroke. - 0039-2499 .- 1524-4628. ; 49:10, s. 2508-2511
  • Tidskriftsartikel (refereegranskat)abstract
    • Background and Purpose- Observational studies have reported increased risk of ischemic stroke among individuals with low serum 25-hydroxyvitamin D (S-25OHD) concentrations but uncertainty remains about the causality of this association. We sought to determine whether S-25OHD concentrations are causally associated with ischemic stroke and its subtypes using Mendelian randomization. Methods- We used summary-level data for ischemic stroke (34 217 cases and 404 630 noncases) from the MEGASTROKE consortium. As instruments, we used 6 single nucleotide polymorphisms, explaining 7.5% of the variance in S-25OHD, previously identified to be associated with S-25OHD concentrations in the Study of Underlying Genetic Determinants of Vitamin D and Highly Related Traits consortium (n=79 366). The analyses were conducted using the inverse-variance-weighted method and complemented with the weighted median, heterogeneity-penalized, and Mendelian randomization-Egger approaches. Results- Genetically higher S-25OHD concentration was not associated with ischemic stroke. The odds ratios (95% CI) per genetically predicted 1-SD (≈18 nmol/L) increase in S-25OHD concentrations, based on all 6 single nucleotide polymorphisms, were 1.01 (0.94-1.08; P=0.84) for all ischemic stroke, 0.94 (0.80-1.11; P=0.49) for large artery stroke, 0.95 (0.82-1.11; P=0.55) for small vessel stroke, and 1.02 (0.90-1.16; P=0.74) for cardioembolic stroke. The results were similar in sensitivity analyses. Conclusions- These findings provide no support that higher S-25OHD concentrations are causally associated with any ischemic stroke subtype. Thus, vitamin D supplementation will unlikely reduce the risk of ischemic stroke in the general population.
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