Nephroprotection by antifibrotic and anti-inflammatory effects of the vasopeptidase inhibitor AVE7688

被引:30
作者
Gross, O
Koepke, ML
Beirowski, B
Schulze-Lohoff, E
Segerer, S
Weber, M
机构
[1] Univ Cologne, Cologne Gen Hosp, Fac Med, Merheim Med Ctr,Dept Internal Med 1, D-51109 Cologne, Germany
[2] Univ Munich, Klinikum Innenstadt, Med Poliklin, D-8000 Munich, Germany
关键词
renal hypertension; inflammation; fibrosis; collagen; Alport syndrome;
D O I
10.1111/j.1523-1755.2005.00423.x
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
Background. Chronic renal disease substantially increases the risk of cardiovascular events and death. Vasopeptidase inhibitors are known to show a strong antihypertensive effect. In the present study, we investigated the nephroprotective potential of the vasopeptidase inhibitor AVE7688 beyond its antihypertensive effects in a mouse model of progressive renal fibrosis. Methods. COL4A3 -/- mice received 25 mg AVE7688 per kg body weight. Treatment was initiated in week 4 ( early) and week 7 ( late). Eight mice per group were sacrificed after 7.5 or 9.5 weeks, and serum levels of urea, systemic blood pressure, and proteinuria were measured. Renal tissue was investigated by routine histology, electron microscopy, immunohistochemistry, and Western blotting. Lifespan until death from renal fibrosis was monitored. Results. Lifespan of treated mice increased by 143% ( early therapy) and by 53% ( late therapy) compared to untreated animals (172 +/- 19 vs. 109 +/- 15 vs. 71 +/- 6 days, P < 0.01). Untreated COL4A3-/- mice did not develop severe hypertension ( mean systolic blood pressure 116 +/- 14 vs. 111 +/- 9 mm Hg in wildtype mice), and both therapies mildly reduced systemic blood pressure ( 107 +/- 13 and 105 +/- 14 mm Hg, data not significant). AVE7688 decreased proteinuria from 12 +/- 3 g/L in untreated mice to 2 +/- 1 g/L (early) and to 4 +/- 1g/ L ( late therapy, P < 0.05), as well as serum-urea from 247 +/- 27 to 57 +/- 10 and to 105 +/- 20 mmol/ L (P < 0.05). Extent of fibrosis, inflammation, and profibrotic cytokines was reduced by AVE7688 therapy. Conclusion. The results indicate a strong nephroprotective effect of the vasopeptidase inhibitor in this animal model of progressive renal fibrosis. Besides the antihypertensive action of AVE7688, its antifibrotic, anti-inflammatory, and antiproteinuric effects demonstrated in the present study may serve as an important therapeutic option for chronic inflammatory and fibrotic diseases in man.
引用
收藏
页码:456 / 463
页数:8
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