Evidence map›Paper›PMID 34167149›Full record

SynthesisAdvances in nutrition (Bethesda, Md.)2021

Vitamin D Receptor Gene Polymorphisms and Risk of Alzheimer Disease and Mild Cognitive Impairment: A Systematic Review and Meta-Analysis.

Nanyang Liu, Tingting Zhang, Lina Ma, Wei Wei, Zehui Li, Xuefan Jiang, Jiahui Sun, Hui Pei, Hao Li

Open access · greenAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Advances in nutrition (Bethesda, Md.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 25 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Review
  6. Nutrition: A non-negligible factor in the pathogenesis and treatment of Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Review
  7. Review
  8. Article
  9. Role of Calcitriol and Vitamin D Receptor (International journal of molecular sciences · 2024
    Review
  10. Article
  11. Vitamin D receptor and binding protein genes variants in patients with migraine.Annals of clinical and translational neurology · 2023
    Article
  12. Review
  13. [The current applicating state of neural network-based electroencephalogram diagnosis of Alzheimer's disease].Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi · 2022
    Article
  14. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 1 country.

Nanyang LiuDepartment of Geratology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.ORCID 0000-0003-4074-0268
Tingting ZhangCollege of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Shandong, China.
Lina MaDepartment of Geratology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.
Wei WeiCollege of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Shandong, China.
Zehui LiCollege of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Shandong, China.
Xuefan JiangGraduate School, Beijing University of Chinese Medicine, Beijing, China.
Jiahui SunGraduate School, Beijing University of Chinese Medicine, Beijing, China.
Hui PeiDepartment of Geratology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.
Hao LiDepartment of Geratology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.
Chinese Academy of Medical Sciences & Peking Union Medical College · CNShandong University of Traditional Chinese Medicine · CNBeijing University of Chinese Medicine · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The results from epidemiologic studies suggest that vitamin D receptor (VDR) gene polymorphisms are potentially associated with Alzheimer disease (AD) and mild cognitive impairment (MCI), but this association has yet to be confirmed. Here, we conducted a meta-analysis based on a larger sample size to clarify the contribution of VDR gene polymorphisms to MCI and AD susceptibility. The PubMed, Embase, Cochrane Library, and China National Knowledge Infrastructure databases were searched to obtain studies published before 30 October, 2020. The case group includes MCI and AD patients, and the matched controls were without any cognitive complaints. ORs and 95% CIs were used to assess the strength of the association. Ten case-control studies with 3573 participants and 4 loci of ApaI rs7975232, BsmI rs1544410, FokI rs10735810, and TaqI rs731236 were included in the meta-analysis. The global assessment indicated an association between the BsmI polymorphism and increased odds of MCI in the allelic model (b compared with B; OR: 1.77; 95% CI: 1.24, 2.54), the dominant model (bb + Bb compared with BB; OR: 2.04; 95% CI: 1.32, 3.16), and the heterozygote model (Bb compared with BB; OR: 1.97; 95% CI: 1.26, 3.09). In contrast, the ApaI polymorphism was protective against MCI in all models. The dominant model (tt + Tt compared with TT; OR: 1.44; 95% CI: 1.17, 1.79) and the homozygous model (tt compared with TT; OR: 1.43; 95% CI: 1.02, 2.00) revealed an association between the TaqI polymorphism of the VDR gene and increased odds of AD, particularly for Caucasian subjects. Egger's linear regression test found no publication bias. This meta-analysis indicated that VDR ApaI and BsmI, and TaqI gene polymorphisms may be important predictors of MCI and AD, respectively, with population discrepancies. More research is needed to further confirm these associations, especially considering gene-gene interactions, gene-environment interactions, and other confounding factors.

Indexed as

Alzheimer DiseaseCognitive DysfunctionReceptors, CalcitriolGenetic Predisposition to DiseaseHumansPolymorphism, Single NucleotideReceptors, CalcitriolVDR protein, humanAlzheimer diseasemild cognitive impairmentpolymorphismssingle nucleotide polymorphismsvitamin D receptor

Identifiers

PMID34167149
PMCPMC8634528
OpenAlexW3174944762

What Socratic holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.