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Lower vitamin D in blood causes Alzheimer's Disease (Mendelian gene analysis) – Dec 2019

Circulating Vitamin D Levels and Alzheimer's Disease: A Mendelian Randomization Study in the IGAP and UK Biobank.

J Alzheimers Dis. 2019 Dec 2. doi: 10.3233/JAD-190713
Wang L1, Qiao Y2, Zhang H3, Zhang Y2, Hua J4, Jin S4, Liu G3,5.

VitaminDWiki
  • Many other studies have found Vitamin D to be associated with Alzheimer's Disease
  • This study found that genes which result in lower blood level of vitamin D are associated with Alzheimer's Disease

This study appears to ignore the 7 additional genes which can further decrease the amount of Vitamin D actually getting to the brain


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Alzheimers-Cognition - Overview starts with

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Observational studies strongly supported the association of low levels of circulating 25-hydroxyvitamin D (25OHD) and cognitive impairment or dementia in aging populations. However, randomized controlled trials have not shown clear evidence that vitamin D supplementation could improve cognitive outcomes. In fact, some studies reported the association between vitamin D and cognitive impairment based on individuals aged 60 years and over. However, it is still unclear that whether vitamin D levels are causally associated with Alzheimer's disease (AD) risk in individuals aged 60 years and over. Here, we performed a Mendelian randomization (MR) study to investigate the causal association between vitamin D levels and AD using a large-scale vitamin D genome-wide association study (GWAS) dataset and two large-scale AD GWAS datasets from the IGAP and UK Biobank with individuals aged 60 years and over. Our results showed that genetically increased 25OHD levels were significantly associated with reduced AD risk individuals aged 60 years and over. Hence, our findings in combination with previous literature indicate that maintaining adequate vitamin D status in older people especially aged 60 years and over, may contribute to slow down cognitive decline and to forestall AD. Long-term randomized controlled trials are required to test whether vitamin D supplementation may prevent AD in older people especially those aged 60 years and may be recommended as preventive agents.


Created by admin. Last Modification: Tuesday December 10, 2019 14:42:01 GMT-0000 by admin. (Version 13)

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ID Name Comment Uploaded Size Downloads
13131 Genes and Alz sci-hub.pdf PDF 2019 admin 10 Dec, 2019 13:57 233.03 Kb 154
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