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  • Title: Effects of Pro12Ala polymorphism of peroxisome proliferator-activated receptor gamma2 gene on rosiglitazone response in type 2 diabetes.
    Author: Kang ES, Park SY, Kim HJ, Kim CS, Ahn CW, Cha BS, Lim SK, Nam CM, Lee HC.
    Journal: Clin Pharmacol Ther; 2005 Aug; 78(2):202-8. PubMed ID: 16084854.
    Abstract:
    OBJECTIVE: The aim of this study was to examine the effects of the Pro12Ala polymorphism of the peroxisome proliferator-activated receptor (PPAR) gamma2 gene on the response to rosiglitazone in patients with type 2 diabetes mellitus. METHODS: A total of 198 patients with type 2 diabetes mellitus were treated with rosiglitazone (4 mg/d) for 12 weeks without a change in previous medications. All patients were genotyped for the PPARgamma2 Pro12Ala polymorphism. RESULTS: The Ala12 allele frequency was 0.04. Of the 198 patients, 183 had the Pro12Pro genotype and 15 had the Pro12Ala genotype. The Ala12Ala genotype was not observed. The decrease in fasting plasma glucose level was significantly greater in subjects with the Ala12 allele than in those without the allele (50.6 +/- 27.8 mg/dL versus 24.3 +/- 41.9 mg/dL, P = .026). In addition, the decrease in hemoglobin A(1c) level was significantly greater in subjects with the Ala12 allele than in those without the allele (1.41% +/- 1.47% versus 0.57% +/- 1.16%, P = .015). There was a significant difference in the response rate to rosiglitazone treatment between the Pro12Pro group and the Pro12Ala variant group (43.72% versus 86.67%, P = .002). CONCLUSION: Patients with the Pro12Ala genotype in the PPARgamma2 gene had a better therapeutic response to rosiglitazone than did patients with the Pro12Pro genotype. The genetic variations in the PPARgamma2 gene can affect the response to rosiglitazone treatment in patients with type 2 diabetes mellitus.
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