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Human bone morphogenetic protein-7 does not counteract aristolochic acid-induced renal toxicity

机译:人骨形态发生蛋白-7不会抵消诸如肾毒素诱导的肾毒性

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摘要

Aristolochic acids (AA) are nephrotoxic and profibrotic agents, leading to chronic kidney disease. As some controversial studies have reported a nephroprotective effect of exogenous recombinant human bone morphogenetic protein (rhBMP)-7 in several models of renal fibrosis, we investigated the putative effect of rhBMP-7 to prevent progressive tubulointerstitial damage after AA intoxication in vitro and in vivo. In vitro, the toxicity of AA on renal tubular cells was demonstrated by an increase in vimentin as well as a decrease in -catenin expressions, reflecting a dedifferentiation process. Increased fibronectin and interleukin-6 levels were measured in the supernatants. Enhanced -SMA mRNA levels associated to decreased E-cadherin mRNA levels were also measured. Incubation with rhBMP-7 only prevented the increase in vimentin and the decrease in -catenin expressions. In vivo, in a rat model of AA nephropathy, severe tubulointerstitial lesions induced by AA after 10 and 35days (collagen IV deposition and tubular atrophy), were not prevented by the rhBMP-7 treatment. Similarly, rhBMP-7 did not ameliorate the significant increase in urinary concentrations of transforming growth factor-. In summary, our in vitro data demonstrated a poor beneficial effect of rhBMP-7 to reverse cell toxicity while, in vivo, there was no beneficial effect of rhBMP-7. Therefore, further investigations are needed to confirm the exact role of BMP-7 in progressive chronic kidney disease. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译:鸟龙酸(AA)是肾毒性和引发剂,导致慢性肾病。由于一些有争议的研究报告了外源性重组人骨形态发生蛋白(RHBMP)-7在肾纤维化模型中的肾脏保护作用,我们研究了RHBMP-7的推定作用,以防止在体外和体内醉酒后的进步细胞间损伤。体外,通过增加Vimentin的增加以及-Catenin表达的减少来证明AA对肾小管细胞的毒性,反映了去除湿过程。在上清液中测量增加的纤连蛋白和白细胞介素-6水平。还测量了与降低的e-cadherin mRNA水平相关的增强型-SMA mRNA水平。与RHBMP-7一起孵育仅阻止了Vimentin的增加和-Catenin表达的降低。在体内,在AA肾病的大鼠模型中,通过RHBMP-7治疗不会预防由AA后诱导的AA肾病的严重细胞间病变(胶原素IV沉积和管状萎缩)。类似地,rhBMP-7并未改善转化生长因子的尿液浓度的显着增加。总之,我们的体外数据显示了rhBMP-7对逆向细胞毒性的良好效果,而在体内,RHBMP-7没有有益的效果。因此,需要进一步调查来确认BMP-7在逐步慢性肾病中的确切作用。版权所有(c)2015 John Wiley&Sons,Ltd。

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