Evidence map›Paper›PMID 27772736›Full record

ArticleJournal of the neurological sciences2016

Vitamin D receptor gene polymorphisms and cognitive decline in Parkinson's disease.

Nicole M Gatto, Kimberly C Paul, Janet S Sinsheimer, Jeff M Bronstein, Yvette Bordelon, Rebecca Rausch, Beate Ritz

Abstract read
In one paragraph

Article in Journal of the neurological sciences, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

24 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  15. Gut feelings: the microbiota-gut-brain axis on steroids.American journal of physiology. Gastrointestinal and liver physiology · 2022
    Review
  16. Article
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  20. Benefits of Vitamins in the Treatment of Parkinson's Disease.Oxidative medicine and cellular longevity · 2019
    Review
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

7 authors.

Nicole M GattoSchool of Community and Global Health, Claremont Graduate University, Claremont, CA 91711, United States. Electronic address: nicole.gatto@cgu.edu.
Kimberly C PaulDepartment of Epidemiology, UCLA, Los Angeles, CA 90095, United States.
Janet S SinsheimerDepartment of Human Genetics, UCLA, Los Angeles, CA 90095, United States; Department of Biomathematics, UCLA, Los Angeles, CA 90095, United States; Department of Biostatistics, UCLA, Los Angeles, CA 90095, United States.
Jeff M BronsteinDepartment of Neurology, UCLA, Los Angeles, CA 90095, United States.
Yvette BordelonDepartment of Neurology, UCLA, Los Angeles, CA 90095, United States.
Rebecca RauschDepartment of Neurology, UCLA, Los Angeles, CA 90095, United States.
Beate RitzDepartment of Epidemiology, UCLA, Los Angeles, CA 90095, United States; Department of Environmental Health Sciences, UCLA, Los Angeles, CA 90095, United States; Department of Neurology, UCLA, Los Angeles, CA 90095, United States.

Funding

STATISTICAL METHODS FOR GENE MAPPINGR01GM053275 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI LANGE, KENNETH L · 1995 to 2019
$9.3M
Training in Molecular ToxicologyT32ES015457 · NIEHS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI ALLARD, PATRICK, HANKINSON, OLIVER NMN · 2008 to 2025
$4.0M
Sunlight Exposure & Vitamin D Metabolic Gene Variations in Parkinson's DiseaseR03ES017139 · NIEHS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI RITZ, BEATE R. · 2009 to 2010
$153k
NIEHS NIH HHS R03 ES017139NIEHS NIH HHS T32 ES015457NIGMS NIH HHS R01 GM053275
6 · The paper itself

Abstract

We and others have suggested that vitamin D receptor gene (VDR) polymorphisms influence susceptibility for Parkinson's disease (PD), Alzheimer's disease (AD), mild cognitive impairment (MCI) or overall cognitive functioning. Here we examine VDR polymorphisms and cognitive decline in patients with PD. Non-Hispanic Caucasian PD patients (n=190) in the Parkinson Environment Gene (PEG) study were successfully genotyped for seven VDR polymorphisms. Cognitive function was assessed with the Mini-Mental State Exam (MMSE) at baseline and at a maximum of three follow-up exams. Using repeated-measures regression we assessed associations between VDR SNP genotypes and change in MMSE longitudinally. PD cases were on average 67.4years old at diagnosis and were followed for an average of 7.1years into disease. Each additional copy of the FokI A allele was associated with a 0.115 decrease in the total MMSE score per year of follow-up (β=-0.115, SE(β)=0.05, p=0.03) after adjusting for age, sex, education and PD duration. The effect on MMSE by the FokI A allele was comparable in absolute magnitude to the effect for disease duration in years prior to first interview (β=-0.129 per year, SE(β)=0.08, p=0.13), and years of education (β=0.118 per year, SE(β)=0.03, p<0.001). When LD/LED use and PD subtype were added to the model, the effect of the FokI A allele on total MMSE score was magnified (β=-0.141, SE(β)=0.05, p=0.005). Results point to Fokl, a functional VDR polymorphism, as being associated with cognitive decline in PD. Future studies examining the contributions of the vitamin D metabolic pathway to cognitive dysfunction in PD are needed.

Indexed as

Genetic Predisposition to DiseasePolymorphism, Single NucleotideAgedAntiparkinson AgentsCase-Control StudiesCognitive DysfunctionEducational StatusFemaleFollow-Up StudiesGene-Environment InteractionHumansLongitudinal StudiesMaleMental Status ScheduleParkinson DiseaseReceptors, CalcitriolAntiparkinson AgentsReceptors, CalcitriolVDR protein, humanCognitive declineFokIMMSEParkinson's diseaseVitamin D receptor

Identifiers

PMID27772736
PMCPMC5325129

What OpenQuestion holds

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Registered trials

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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 OpenQuestion graph.