长期小剂量应用关木通对部分肾切除大鼠肾脏的影响

目的：了解长期小剂量应用关木通是否可加重慢性肾衰竭大鼠肾脏损害。方法：采用5／6肾切除方法复制大鼠慢性肾衰竭模型，第1组给予与药典剂量相当（1g/kg)的关木通煎剂，第2组给予关木通3g/kg，第3组给予相同量的自来水，均每天灌胃1次，共8周，观察血清肌酐、尿素氮、尿蛋白含量以及肾脏形态变化。结果：8周后，第2组血清肌酐、尿素氮和尿蛋白排泄量显著高于第3组[分别为（165．0±15．6）和（109．8±10．0）μmol/L，（27．8±3．6）和（18．7±2．5）mmol/L,(68.2±10．1）和（44．6±8．5）mg/24h,P值均＜0．05]，肾间质病变和肾小球硬化程度也较重。结论：慢性肾衰竭大鼠对小剂量关木通的肾脏毒性作用的易感性增加，长期小剂量应用关木通可显著加速慢性肾衰大鼠肾脏损害进程。

Influence of Long-Term Use of Low Dose Caulis Aristolochiae Manshuriensis on Partial Nephrectomized Rats

OBJECTIVE: To study the effect of long-term use of low dose Caulis Aristolochiae Manshuriensis (CAM) on the deterioration of chronic renal failure rats. METHODS: The 5/6 nephrectomized Wistar rats were taken as animal model of chronic renal failure, which were divided into 3 groups. Group A was treated with 1 g/kg CAM decoction, the dose equivalent to that defined in the pharmacopoeia. Group B was treated with 3 g/kg CAM decoction and Group C treated with equal volume of tap water. Medication was given once per day by gastrogavage in all the three groups for 8 weeks. The serum creatinine, urea nitrogen, urinary protein content and morphological changes of kidney were observed. RESULTS: After 8 weeks treatment, levels of serum creatinine, urea nitrogen, urinary protein excretion in Group B were higher than those in Group C significantly, they were 165.0 +/- 15.6 mumol/L vs 109.8 +/- 10.0 mumol/L, 27.8 +/- 3.6 mmol/L vs 18.7 +/- 2.5 mmol/L and 68.2 +/- 10.1 mg/24 hrs vs 44.6 +/- 8.5 mg/24 hrs, respectively, all P < 0.05. The pathological changes of renal mesenchyme and degree of glomerulosclerosis were also heavier in Group B. CONCLUSION: The susceptibility of chronic renal failure rats to the nephrotoxicity of CAM increases in long-term use of low dose CAM which could accelerate the deterioration of renal impairment in the model rats.