Allele frequency and genotype distribution of a common variant in the 3 ́-untranslated region of the SLC22A3 gene in patients with type 2 diabetes: Association with response to metformin
Abstract:
Background
Organic cation transporter 3 (OCT3) is an excellent transporter for metformin, which is used as first-line therapy for type 2 diabetes (T2D). OCT3 genetic variants may influence the clinical response to metformin. This study aimed to determine the genotype and allele frequency of OCT3-564G>A (rs3088442) variant and its role in the glycemic response to metformin in patients with newly diagnosed T2D.
Materials And Methods
Based on the response to metformin, 150 patients were classified into two groups: Sixty-nine responders (decrease in glycosylated hemoglobin [HbA1c] values by more than 1% from the baseline) and 81 nonresponders (decrease in HbA1c values A was genotyped using polymerase chain reaction - based restriction fragment length polymorphism.
Results
The genotypes frequencies were 51.3% GG, 36% AG, and 12.7% AA. Allele frequency of major allele (G) and minor allele (A) in OCT3-564G>A variant was found to be 0.69 and 0.31, respectively. Fasting glucose, HbA1c, body mass index, and lipid profile in both GG genotypes and GA AA group decreased significantly after 3 months of metformin therapy compared with baseline (P 0.05).
Conclusion
The A allele frequency (which may be a protective allele against coronary heart disease) in the Iranian diabetic patients was lower than Iranian, Caucasian and Japanese healthy populations. Metformin is useful in improving the lipid profile, in addition to its impacts in glycemic control, and these effects are regardless of OCT3-564G>A variant.
Language:
English
Published:
Journal of Research in Medical Sciences, Volume:21 Issue: 6, 2016 June
Page:
7
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