Associations of vitamin D deficiency and vitamin D receptor (Cdx-2, Fok I, Bsm I and Taq I) polymorphisms with the risk of primary open-angle glaucoma

Yingjuan Lv, Qingbin Yao, Wenjiang Ma, Hua Liu, Jian Ji, Xiaorong Li, Yingjuan Lv, Qingbin Yao, Wenjiang Ma, Hua Liu, Jian Ji, Xiaorong Li

Abstract

Background: Vitamin D deficiency and vitamin D receptor gene polymorphisms are known to be significantly associated with high myopia. Whether this genetic variant may impact primary open-angle glaucoma is largely unknown. This study investigated whether vitamin D receptor gene polymorphisms are altered in primary open-angle glaucoma subjects carrying the risk allele, and whether vitamin D deficiency is an important factor in the development of glaucoma.

Methods: Seventy-three POAG patients and 71 age-matched controls from the Han population were enrolled. Serum levels of 1a, 25-Dihydroxyvitamin D3 were measured by enzyme-linked immunoabsorbent assay. Vitamin D receptor polymorphisms (Cdx-2, Fok I, Bsm I and Taq I) were analyzed using real-time polymerase-chain reaction high resolution melting analysis.

Results: Serum levels of 1a, 25-Dihydroxyvitamin in primary open-angle glaucoma patients were lower than in age-matched controls. Statistical analysis revealed a significant difference in the allelic frequencies of the BsmI and TaqI genotypes between primary open-angle glaucoma patients and age-matched controls, while other polymorphisms did not show any significant differences.

Conclusions: Vitamin D deficiency and the presence of the BsmI 'B' allele and the TaqI 't' allele are relevant risk factors in the development of glaucoma.

Trial registration: Clinical Trials.gov: NCT02539745 . The study was registered retrospectively on August 3rd, 2015. The first participant was enrolled on July 4th, 2013.

Keywords: Polymorphism; Primary open-angle glaucoma; Vitamin D deficiency; Vitamin D receptor.

Figures

Fig. 1
Fig. 1
Genotypes of VDR gene (a: Cdx-2, b: Fok I, c:Bsm I, d: Taq I) polymorphisms were determined by PCR-HRM

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