毒理性
环孢素(CyA)是一种用于实体器官移植后的免疫抑制剂,但其临床应用受到副作用限制,其中最重要的是肾毒性。... 之前的一项工作... 证实了L-丙酰肉碱(L-PC),即L-肉碱的丙酰酯,能够通过减少在隔离和灌注的大鼠肾脏中的脂质过氧化来预防CyA引起的急性肾毒性。CyA给药与剂量依赖性的肾血管阻力增加相关,而预先使用L-PC可以预防这种情况。本研究的目的是在体内大鼠模型中证实L-PC的保护作用... 慢性肾毒性研究进行了28天。从第一天开始给予L-PC(ip 25 mg/kg bw),而CyA治疗在最后21天进行(口服给药25 mg/kg bw)。... L-PC能够显著降低CyA处理动物的血压,并预防CyA引起的肌酐清除率下降。此外,肾脏组织分析显示L-PC能够减少与慢性CyA给药相关的脂质过氧化物的含量和形态学异常。总之,我们的研究首次在体内证实,L-PC能够保护免受与慢性CyA给药相关的功能和组织损伤。
Cyclosporine (CyA) is an immunosuppressive agent used after solid organ transplantation, but its clinical use is limited by side effects, the most important of which is nephrotoxicity. ... A previous work ... demonstrated that L-propionylcarnitine (L-PC), a propionyl ester of L-carnitine, is able to prevent CyA-induced acute nephrotoxicity reducing lipid peroxidation in the isolated and perfused rat kidney. CyA administration was associated with a dose dependent increase in renovascular resistance prevented by a pretreatment with L-PC. The aim of the present study was to confirm L-PC protective effect ... in an in vivo rat model. Chronic nephrotoxicity study was carried out for 28 days. L-PC was administered (ip 25 mg/kg bw) since the first day, while CyA treatment was performed for the last 21 days (by oral administration 25 mg/kg bw). ... L-PC was able to significantly lower blood pressure in CyA treated animals and to prevent CyA induced decrease in creatinine clearance. Moreover renal tissue analysis revealed that L-PC was able to reduce lipid hydroperoxide content and morphological abnormalities associated to chronic CyA administration. In conclusion our study demonstrated for the first time in vivo that L-PC protects against functional and tissue damage associated to chronic CyA administration.
来源:Hazardous Substances Data Bank (HSDB)