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Effects of vitamin D receptor gene polymorphisms on susceptibility to type 1 diabetes mellitus

Xin-Hua Xiao1, Zhe-Long Liu, Heng Wang

  • 1Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730. xiaoxinhua@medmail.com.cn

Chinese Medical Sciences Journal = Chung-Kuo I Hsueh K'O Hsueh Tsa Chih
|July 19, 2006
PubMed

Insights

Vitamin D receptor (VDR) gene BsmI polymorphism is linked to increased type 1 diabetes mellitus (T1DM) risk in the Chinese Han population. This finding suggests VDR gene variations influence T1DM susceptibility.

Area of Science:

  • Genetics
  • Immunology
  • Endocrinology

Background:

  • Type 1 diabetes mellitus (T1DM) is an autoimmune disease with complex genetic and environmental factors.
  • The vitamin D receptor (VDR) gene plays a role in immune regulation and calcium metabolism, making it a candidate gene for T1DM susceptibility.

Purpose of the Study:

  • To examine the association between VDR gene polymorphisms (ApaI, TaqI, BamI) and T1DM risk in the Chinese Han population.
  • To determine if specific VDR gene variants influence susceptibility to type 1 diabetes.

Main Methods:

  • Genotyping of 136 Chinese Han individuals (54 T1DM patients, 82 healthy controls) using polymerase chain reaction-restriction fragment length polymorphism.
  • Analysis focused on three restriction sites: ApaI, TaqI, and BamI within the VDR gene.

Main Results:

  • A significantly higher frequency of the BsmI (BamI) B allele was observed in T1DM patients compared to healthy controls (P = 0.033).
  • No significant differences in the distribution of ApaI and TaqI polymorphisms were found between T1DM patients and controls.

Conclusions:

  • The BsmI polymorphism in the VDR gene may be associated with an increased susceptibility to type 1 diabetes mellitus.
  • These findings suggest a potential role for VDR gene variants in the pathogenesis of T1DM within the studied Chinese Han population.
Abstract

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