Objective: Peroxisome proliferator-activated receptor γ (PPARγ) plays a critical role in adipocyte differentiation and the development of type 2 diabetes mellitus (T2DM). Numerous studies across several populations have indicated that Pro12Ala polymorphism of PPARγ is associated with decreased insulin resistance and decreased risk of T2DM. The aims of this study are to develop a simple and sensitive detection of Pro12Ala polymorphism and examined the distribution of this polymorphism in Chinese population. Methods: The PPAR-γ gene fragment containing Pro12Ala variant of 101 T2DM patients and 104 controls were amplified by PCR amplification and the extension reaction was performed using primer that adjacent to the single nucleotide polymorphic site in presence of two different dye-labeled terminators. The primer's specially extending reactions make the increase of their fluorescence polarization (FP) that mean special genotype. The variant frequencies of the two groups were compared. Results: We detected the Pro12Ala variant successfully by TDI-FP method and we found no significant association between this polymorphism and T2DM in case-control study. Conclusion: The TDI-FP technology is a new specific and sensitive method that is suitable for automatic detection of large number of clinical samples. Pro12Ala mutation in PPAR-γ2 gene does not play a significant role in T2DM risk in Chinese population.
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