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[Relationships of angiotensinogen gene M235T variant with diabetic nephropathy in Chinese type 2 diabetes mellitus].

OBJECTIVE
To investigate whether angiotensinogen(AGT) gene M235T variant is associated with type 2 diabetes mellitus without nephropathy (DM) and/or diabetic nephropathy (DN) in Chinese type 2 diabetes.


METHODS
AGT genotypes of 84 cases with DM, 96 with DN and 98 controls were determined by polymerase chain reaction (PCR) amplification and restriction fragment length polymorphism analysis of the region of the variant.


RESULTS
Increased frequencies of T allele (0.82) and TT genotype (0.70) were observed in 96 subjects with DN, compared with those observed in 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 DN in analysis adjusted for several DN risk factors. There was no difference in allele distribution between 84 DM patients and the controls.


CONCLUSION
TT genotype of the AGT gene might be an independent risk factor of diabetic nephropathy in Chinese patients with type 2 diabetes mellitus.