eISSN: 1896-9151
ISSN: 1734-1922
Archives of Medical Science
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SCImago Journal & Country Rank
4/2012
vol. 8
 
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abstract:

Clinical research
Evaluation of glutathione S-transferase P1 genetic variants affecting type-2 diabetes susceptibility and glycemic control

Mahmoud A. Amer
,
Maivel H. Ghattas
,
Dina M. Abo-ElMatty
,
Soad H. Abou-El-Ela

Arch Med Sci 2012; 8, 4: 631-636
Online publish date: 2012/09/08
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Introduction: Type 2 diabetes mellitus (T2DM) is associated with increased production of reactive oxygen species and a reduction in antioxidant defenses leading to oxidative stress. Glutathione S-transferases (GSTs) modulate oxidative stress. The present cross-sectional study was aimed at investigating the association between the GSTP1 gene polymorphism and T2DM and to clarify their effect on the glycemic control parameters.

Material and methods: From the Egyptian population, we enrolled 112 T2DM patients and 188 healthy controls matched for age, sex and origin. Serum lipid profile, blood-glucose level, glycated hemoglobin (HbA1c) and body mass index (BMI) were measured. DNA was extracted from the blood samples. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to measure GSTP1 Ile105Val gene polymorphism of study participants.

Results: The frequency of the Val allele in exon 5 of the GSTP1 gene in patients with T2DM was higher than that observed in healthy controls (15.2% vs. 9.6%); the difference was considered statistically significant when compared to Ile allele carriers (p = 0.03). The presence of the GSTP1 heterozygous mutant allele Ile/Val was more common in subjects with T2DM than in the control group (30.4% and 19.2%, respectively; p = 0.02). Variation in the GSTP1 gene was associated with BMI (p = 0.02) and not associated with glycemic control parameters (fasting serum glucose and HbA1c) or smoking-related risk of T2DM.

Conclusions: GSTP1 gene polymorphism may play a significant role in increasing the susceptibility to and risk of T2DM and obesity regardless of smoking status and had no apparent effect on HbA1c in patients with diabetes mellitus.
keywords:

GSTP1, type 2 diabetes mellitus, glycated hemoglobin, body mass index, polymerase chain reaction-restriction fragment length polymorphism

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