Nephrol Dial Transplant (2000) 15: 1965-1970
© 2000 European Renal Association-European Dialysis and Transplant Association
Angiotensinogen M235T and chymase gene CMA/B polymorphisms are not associated with nephropathy in type II diabetes
Department and Clinic of Internal Medicine and Diabetology, Silesian School of Medicine, Zabrze, Poland
Background. Several studies have suggested that the same genetic factors may be involved in the predisposition to both essential hypertension and diabetic nephropathy, but the molecular mechanism underlying this predisposition still remains unclear. In particular, the role of genes involved in blood-pressure regulation and angiotensin II action is still controversial. This study examines a possible association between angiotensinogen M235T and chymase gene CMA/B polymorphisms with the presence of nephropathy in type II diabetic Caucasians.
Methods. For the purposes of the study, 323 microalbuminuric and 127 overt proteinuric cases, together with 243 normoalbuminuric controls with long-duration diabetes were selected from a group of 941 type II diabetic patients with established renal status.
Results. No differences in the genotype distributions or allele frequencies of the examined polymorphisms between the study groups were observed. The study groups were also stratified by gender, diabetes duration, level of glycaemic control, body mass index, hypertension, and retinopathy status, but still no distortion in the distributions of genotypes of any of the examined polymorphisms in any of the strata was shown.
Conclusions. Our study provided evidence against an association between angiotensinogen M235T or chymase gene CMA/B polymorphisms and the presence of incipient or overt nephropathy in Caucasian patients with type II diabetes.
Keywords: angiotensinogen; chymase; genetics; nephropathy; NIDDM; polymorphisms
Correspondence and offprint requests to: Wladyslaw Grzeszczak, Department and Clinic of Internal Medicine and Diabetology, Silesian School of Medicine, 3-Maja 13-15, 41-800 Zabrze, Poland.
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