• Chinese Med J Peking · Sep 1999

    Relationship between angiotensinogen gene M235T variant with diabetic nephropathy in Chinese NIDDM.

    • J Wang, X Zhu, L Yang, Y Liu, W Zhou, and H Li.
    • Department of Diabetes, Affiliated Beijing Tong Ren Hospital, Capital University of Medical Science, Beijiing 100730, China.
    • Chinese Med J Peking. 1999 Sep 1; 112 (9): 797800797-800.

    ObjectiveTo investigate whether angiotensinogen (AGT) gene M235T variant is associated with non-insulin-dependent diabetes mellitus without nephropathy (DN-), and diabetic nephropathy (DN+) in Chinese non-insulin-dependent diabetes mellitus (NIDDM).MethodsThe subjects in DN+ group, DN- group and control group were well matched with sex, age and duration of disease, and the two case groups were divided into two subgroups as with and without hypertension respectively. The M235T polymorphism of AGT gene of 84 cases with DN-, 96 patients with DN+ and 98 controls were determined by polymerase chain reaction (PCR) amplification and restriction fragment length polymorphism (RFLP) analysis of the region of the variant, i.e. M235T polymorphism.ResultsThe increased frequencies of T allele (0.82) and TT genotype (0.70) were observed in 96 subjects with DN+ as compared with 98 control subjects (0.63 and 0.43, respectively, P = 0.003, P = 0.0004). The odds ratio associated with TT genotype was 3.47 (95% CI: 1.51-7.94; P = 0.0033) for diabetic nephropathy in analysis adjusted for several risk factors of diabetic nephropathy, such as body-mass index, systolic and diastolic blood pressure, serum cholesterol, low density lipoprotein and high density lipoprotein. Subgroup analysis of the 67 patients in DN+ group with hypertension revealed similar distributions of M235T genotypes and alleles to those in the DN+ without hypertension subgroup. There was no difference in allele and genotype distribution between 84 DN- patients and the controls. Similarly, frequencies of the AGT M235T genotype and allele were not different between two DN- subgroups.ConclusionsAGT gene M235T polymorphism is associated with diabetic nephropathy in NIDDM. TT genotype of the AGT gene might be an independent risk factor of diabetic nephropathy in Chinese NIDDM patients.

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