• NAVNEET KAUR Department of Biotechnology, Sri Guru Gobind Singh College, Chandigarh, India.
  • GURJIT KAUR BHATTI Department of Medical Lab Technology, University Institute of Applied Health Sciences, Chandigarh University, Mohali, Punjab, India.
  • SANJAY KUMAR BHADADA Department of Endocrinology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
  • SAMER SINGH Department of Microbial Biotechnology, Panjab University, Chandigarh, India.
  • JASVINDER SINGH BHATTI Department of Biotechnology, Sri Guru Gobind Singh College, Chandigarh, India.


Background: The variants of transcription factor 7-like 2 (TCF7L2) gene have been shown to be associated with type 2 diabetes mellitus (T2DM) and its related complications.

Objectives: We aimed to explore the possible association of rs7903146 (C/T) variant in TCF7L2 with the risk of T2DM in the North Indian population.

Methods: The present case–control study included a total of 638 human subjects (318 T2DM subjects and 320 healthy controls). Various anthropometric, biochemical, and genetic parameters were studies in all the subjects. Genotyping of TCF7L2 gene was carried out using allele-specific polymerase chain reaction method.

Results: The results of this study indicate significantly higher values of body mass index, waist circumference, waist-to-hip ratio, and body fat (%) in T2DM subjects than controls (p≤0.001). Dyslipidemia represented by higher levels of triglycerides and reduced values of high-density lipoprotein was more predominant in diabetic subjects compared to healthy subjects. The frequency of risk genotype (TT) frequency was significantly higher in T2DM subjects (16.4%) compared to controls (11.6%). The “T” allele was more dominant in diabetic subjects than controls. Logistic regression analysis of the data revealed a significant association of TT genotype with 2-fold (odds ratio with 95% of confidence interval; 2.09 [1.29–3.42] p=0.003) and CT genotype with 1.7-fold (1.73 [1.23–2.44] p=0.002) increased risk of developing T2DM.

Conclusions: The present study demonstrated a significant association of rs7903146 (C/T) variant in TCF7L2 with the augmented risk of T2DM in North Indian population.

Keywords: Single nucleotide polymorphism, TCF7L2, Type 2 diabetes mellitus, Insulin resistance, Asian Indians.


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