Role of the α-adducin genotype on renal disease progression

Role of the α-adducin genotype on renal disease progression. Background A genetic susceptibility to hypertension may predispose to the development of end-stage renal disease (ESRD) and promote a more rapid loss of renal function in patients with renal diseases. The α-adducin (ADD) gene, alone or in combination with the angiotensinogen (AGT) and the angiotensin-converting enzyme (ACE), is a candidate for abnormal blood pressure regulation and thus for increased susceptibility or faster progression to ESRD. Methods Genotyping for the G460W-ADD, M235T-AGT and the insertion/deletion (I/D)-ACE gene polymorphisms was performed in 260 control subjects and 260 ESRD patients using polymerase chain reaction, gel analysis and appropriate restriction digest. Results The frequencies of the ADD, AGT and ACE genotypes in ESRD patients did not differ from observed frequencies in control subjects. The average (±SE) time from diagnosis to the onset of ESRD tended to be shorter in the presence of the ADD-460WW (5.1 ± 1.1 years, N = 10) than with the GW (9.9 ± 0.7 years, N = 81) and GG (11.3 ± 1.0 years, N = 164) genotypes (F-ratio=2.71, P = 0.068; WW vs. GW P P Conclusions The ADD genotype is predictive of the course of renal function loss in an unselected renal population and influences the effect of the ACE genotype to modulate the rate of progression to ESRD. Thus, the ADD genotype may play a role for the understanding of interindividual differences in the course of renal diseases.

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