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ACE gene polymorphism and renal responsiveness to ACE inhibitors in IgA nephropathy patients.

Authors
Han S.Y.Kwon Y.J.Jo S.K.Shin J.H.Cha D.R.Cho W.Y.Pyo H.J.Kim H.K.
Issue Date
2000
Keywords
Polymorphism; ACE gene; ACE inhibitors; IgA nephropathy
Citation
The Korean journal of internal medicine, v.15, no.1, pp.13 - 18
Indexed
SCOPUS
Journal Title
The Korean journal of internal medicine
Volume
15
Number
1
Start Page
13
End Page
18
URI
https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/23597
ISSN
1226-3303
Abstract
We examined the renal responsiveness to ACE inhibitor in IgA nephropathy (IgAN) patients according to the grouping of ACE gene polymorphism. Sixty one patients diagnosed as IgAN by renal biopsy and prescribed with ACE inhibitors were enrolled. Genomic DNA was extracted from whole blood and PCR was performed. The I/D polymorphism was determined by the presence of the 287 bp fragment in intron 16 of chromosome 17. During the follow-up period (mean; 44.6 months, median: 44.5 months, 5 to 113 months), the blood pressure of 61 patients was controlled below 130/80 mmHg. The renal responsiveness was determined by the degree of changes of proteinuria at 12 months after initiation of ACE inhibitors and by the slope of reciprocal variation of the serum creatinine against follow-up duration ¿(1/Cr2-1/Cr1)/durations¿. The distribution of the II, ID and DD genotype among 61 patients was 21, 16 and 24 patients, respectively. There were no differences among three genotypes in age, sex, the number of patients with initial blood pressure over 140/90 mmHg, initial serum creatinine level, the number of patients with initial azotemia (> 1.4 mg/dL) and with initial 24-hr proteinuria amount over 2.0 g. Significant anti-proteinuric effect of ACE inhibitor was found in IgAN (p = 0.001), but no significant difference was found among genotypes. Significant difference (p = 0.011) was noticed between II type and DD type in the slope of reciprocal variation of the serum creatinine against follow-up duration. In conclusion, efficacy of ACE inhibitors on renal function preservation in IgAN was more pronounced in DD genotype than II genotype.
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Cho, Won Yong
Anam Hospital (Department of Nephrology and Hypertension, Anam Hospital)
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