alexa Association of Vitamin D Receptor Gene Polymorphisms and Type1 Diabetes in an Egyptian Population
ISSN: 2168-9547

Molecular Biology: Open Access
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Research Article

Association of Vitamin D Receptor Gene Polymorphisms and Type1 Diabetes in an Egyptian Population

Mona Gamal Elgazzaz1*, Eman Abd-ElMoemen Mohammed1, Hoda Ahmed Atwa2 and Fouad Mohamed Badr1

1Genetics Unit, Department of Histology and Cell Biology, Ismailia, Egypt

2Department of Pediatrics, Faculty of Medicine, Suez Canal University, Ismailia, Egypt

*Corresponding Author:
Dr. Mona Gamal Elgazzaz
Genetics Unit, Department of Histology and Cell Biology
Ismailia, Egypt
Tel: +201112518610
E-mail: [email protected]

Received date July 26, 2016; Accepted date July 30, 2016; Published date August 08, 2016

Citation: Elgazzaz MG, Mohammed EAE, Atwa HA, Badr FM (2016) Association of Vitamin D Receptor Gene Polymorphisms and Type1 Diabetes in an Egyptian Population. Mol Biol 5:171. doi:10.4172/2168-9547.1000171

Copyright: © 2016 Elgazzaz MG, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Vitamin D is known for its immune modulatory functions and its role in normal insulin secretion. Vitamin D acts via vitamin D receptor gene (VDR). The study was conducted to assess the relationship between Apa I and Taq I restriction site polymorphisms of vitamin D receptor gene and type1 diabetes in an Egyptian population. Subjects and Methods: One hundred Egyptian participants (1-20 years old) of both sexes were recruited in this study. Fifty of them were type 1 diabetes patients and the other fifty were control non diabetic subjects. Apa I and Taq I variations were tested using Polymerase Chain Reaction and Restriction Fragment Length Polymorphism. Results: Genetic analysis revealed that AA and Tt genotypes were predominant in the two study groups with higher frequency among patients group, whereas, aa and tt genotypes were predominant among controls (14% and 10%, respectively). Combined genotypes AATt, AAtt and aaTT were significantly more frequent in controls (P value of odds ratio 0.032, 0.033, 0.002, respectively). The haplotype AT was more frequent among diabetics (41%), whereas, haplotypes At and aT were more frequent in control group (39%, 29%, respectively). Linkage analysis of the two markers showed strong linkage disequilibrium between two markers (D’=1). Conclusion: Apa I and Taq I VDR gene polymorphisms have an association with T1D and may predispose to the risk of T1D affection. While, genotypes AATt, AAtt and aaTT and haplotypes At and aT seem to have a possible protective effect against T1D.

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