Vitamin D receptor genetic polymorphisms and the risk of multiple sclerosis: A systematic review and meta-analysis

Publication date: Available online 22 February 2020Source: SteroidsAuthor(s): Asadollah Mohammadi, Asaad Azarnezhad, Hashem Khanbabaei, Esmael Izadpanah, Rasoul Abdollahzadeh, George E. Barreto, Amirhossein SahebkarAbstractThere are conflicting results regarding the exact effect of the vitamin D receptor (VDR) gene polymorphisms on the susceptibility to multiple sclerosis (MS). Therefore, we aimed to investigate the impact of four major studied VDR gene polymorphisms consisting of ApaI, BsmI, FokI, and TaqI on the risk of MS in the Iranian population. A literature search was performed in various databases to find case-control studies evaluating the association between VDR gene polymorphisms and MS risk in Iran. Data were extracted and odds ratios (OR) with 95% confidence intervals (CI) were calculated. Subgroup analyze was performed to detect potential sources of heterogeneity. A total of 1206 cases and 1402 controls in nine case-control studies were included. ApaI was the only variant which showed statistically significant relation in allelic (OR=0.54 (95% CI: 0.37–0.79); P=0.00), homozygote (OR=3.48 (95% CI: 1.7–6.9); P=0.00), dominant (OR=0.56 (95% CI: 0.3–0.79); P=0.01), and recessive (OR=0.35 (95% CI: 0.18–0.66); P=0.00) models. The TaqI polymorphism showed a significant negative association with MS only in the homozygote model (OR= 0.28 (95% CI: 0.08–0.9); P=0.04). The BsmI polymorphism also showed significant relation in allelic (OR= 0.69 (95% CI: 0.51–0.94...
Source: Steroids - Category: Drugs & Pharmacology Source Type: research