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Review
. 2022 Jul 6;20(6):433-446.
doi: 10.18502/ijrm.v20i6.11439. eCollection 2022 Jun.

A meta-analysis of the association of ApaI, BsmI, FokI, and TaqI polymorphisms in the vitamin D receptor gene with the risk of polycystic ovary syndrome in the Eastern Mediterranean Regional Office population

Arvin Shahmoradi  1 , Abbas Aghaei  2 , Kimya Ghaderi  1 , Mohammad Jafar Rezaei  3 , Asaad Azarnezhad  4
Affiliations
Review

A meta-analysis of the association of ApaI, BsmI, FokI, and TaqI polymorphisms in the vitamin D receptor gene with the risk of polycystic ovary syndrome in the Eastern Mediterranean Regional Office population

Arvin Shahmoradi et al. Int J Reprod Biomed. .

Abstract

Background: The results of case-control studies on the association between vitamin D receptor gene (VDR) polymorphisms and polycystic ovary syndrome (PCOS) are inconclusive.

Objective: We aimed to more precisely evaluate the correlation between the ApaI, BsmI, FokI, and TaqI VDR gene polymorphisms and PCOS susceptibility.

Materials and methods: PubMed, Scopus, Science Citation Index, and Google Scholar databases were searched to retrieve related reports released up to the end of 2020. To evaluate the association strength of the VDR gene polymorphisms with PCOS risk, pooled odds ratios (OR) with a 95% confidence interval were determined.

Results: In total, 1,119 subjects (560 PCOS cases and 559 controls) from 7 studies were included which met the inclusion criteria. A statistically significant association between the TaqI polymorphism and PCOS susceptibility was found in the Eastern Mediterranean Regional Office population (T vs. t: OR = 0.715; TT vs. tt: OR = 0.435, p < 0.001; TT vs. Tt+tt: OR = 0.696, p = 0.01; tt vs. TT+Tt: OR = 1.791, p < 0.001). It was found that the ApaI variant was a risk factor in the dominant inheritance model (AA vs. Aa+aa: OR = 1.466, p = 0.01) and the FokI polymorphism was a protective factor in the recessive inheritance model (ff vs. FF+Ff: OR = 0.669, p = 0.04). The VDR BsmI polymorphism did not show association with PCOS susceptibility.

Conclusion: Our meta-analysis revealed that the VDR ApaI in the dominant model, VDR FokI in the recessive model, and VDR TaqI polymorphisms in all genetic models are associated with vulnerability to PCOS. However, further studies with a larger sample size are required.

Keywords: Polycystic ovary syndrome; Polymorphisms; Vitamin D receptor.; Meta-analysis.

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Conflict of interest statement

The authors declare that there is no conflict of interest.

Figures

Figure 1
Figure 1
A flow diagram of VDR gene function in the cell and the related SNPs that could be involved in the susceptibility to PCOS.
Figure 2
Figure 2
Flow chart of the literature retrieval and selection process.
Figure 3
Figure 3
Forest plots of VDR ApaI (rs7975232) with dominant model: AA vs. Aa+aa and PCOS in the overall populations.
Figure 4
Figure 4
Forest plots of VDR FokI polymorphism (rs2228570) with recessive model: ff vs. FF+Ff and PCOS in the overall populations.
Figure 5
Figure 5
Statistical analysis of the association between VDR TaqI polymorphism and PCOS risk in the (A) T vs. t and (B) TT vs. tt model.
Figure 6
Figure 6
Statistical analysis of the association between VDR TaqI polymorphism and PCOS risk in the (A) TT vs. Tt + tt and (B) tt vs. TT + Tt model.
See this image and copyright information in PMC

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