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A systematic review and meta-analysis of the associations of vitamin D receptor genetic variants with two types of most common neurodegenerative disorders

  • Jiao Geng
  • Jianjun Zhang
  • Fudong Yao
  • Xiajun Liu
  • Jijun LiuEmail author
  • Yuanchi HuangEmail author
Review Article
  • 28 Downloads

Abstract

Background

Whether vitamin D receptor (VDR) genetic variants influence individual susceptibility to neurodegenerative disorders remains controversial.

Aims

This meta-analysis was conducted to analyze correlations of VDR genetic variants with two types of most common neurodegenerative disorders, Parkinson’s disease (PD) and Alzheimer’s disease (AD).

Methods

Systematic literature research of PubMed and Embase was performed to identify eligible articles. Q test and I2 statistic were employed to decide whether pooled analyses would be performed with random-effect models (REMs) or fixed-effect models (FEMs). All statistical analyses were conducted with Review Manager.

Results

Totally sixteen studies were enrolled for analyses. Among these eligible studies, ten studies were about PD (2356 cases and 2815 controls) and six studies were about AD (1256 cases and 1205 controls). Pooled overall analyses suggested that VDR rs7975232 (additive model: p = 0.03, OR = 1.19, 95% CI 1.01–1.39) and rs2228570 (recessive model: p < 0.008, OR = 1.26, 95% CI 1.06–1.50; allele model: p < 0.001, OR = 0.80, 95% CI 0.71–0.91) variants were significantly correlated with PD, and VDR rs731236 (dominant model: p = 0.003, OR = 0.70, 95% CI 0.56–0.89; additive model: p = 0.02, OR = 1.32, 95% CI 1.06–1.66; allele model: p = 0.02, OR = 0.82, 95% CI 0.69–0.96) variant was significantly correlated with AD. Further subgroup analyses by ethnicity revealed that the positive results were mainly driven by the Asians, whereas no significant associations were observed in Caucasians.

Conclusion

Our meta-analysis suggested that VDR rs7975232 and rs2228570 variants might serve as genetic biomarkers of PD, whereas VDR rs731236 variant might serve as a genetic biomarker of AD.

Keywords

Vitamin D receptor (VDRGene variants Neurodegenerative disorders Parkinson’s disease (PD) Alzheimer’s disease (AD) Meta-analysis 

Notes

Author contributions

JG, JL and YH conceived of the study, participated in its design. JG and JZ conducted the systematic literature review. FY and XL performed data analyses. JG, JL and YH drafted the manuscript. All gave final approval and agree to be accountable for all aspects of work ensuring integrity and accuracy.

Funding

None.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

For this type of study formal consent is not required.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of NeurologyBaoji Municipal Center HospitalBaojiChina
  2. 2.Department of Spinal SurgeryBaoji Municipal Center HospitalBaojiChina
  3. 3.Department of Spinal Surgery, Hong Hui HospitalXi’an Jiaotong University College of MedicineXi’anChina

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