补阳还五汤及其有效组分生物碱和苷对大鼠血管内膜损伤后主动脉内膜增生和增殖细胞核抗原表达的影响

目的：探讨补阳还五汤及其有效组分生物碱和苷类对大鼠血管内膜损伤后主动脉内膜增生和增殖细胞核抗原（proliferating cell nuclear antigen,PCNA）表达的影响。方法：用国产2.0F球囊导管建立大鼠主动脉内皮剥脱模型,术后第1天开始灌胃给药,术后第15天取胸主动脉血管损伤段测定内膜增生程度及增殖细胞核抗原（proliferating cell nuclear antigen,PCNA）的表达。结果：剥脱术后第15天,模型组大鼠主动脉内膜出现显著增生。与假手术组比较,术后各组中膜增生不明显（P〉0.05）,内膜增生明显（P〈0.01）。生物碱组、苷组、补阳还五汤原方组和阿伐他汀组血管内膜增生程度轻于模型组（P〈0.01）。模型组PCNA表达高于假手术组（P〈0.01）。生物碱组、苷组、阿托伐他汀组PCNA表达高于假手术组（P〈0.05,P〈0.01）,但均低于模型组（P〈0.01）。补阳还五汤原方组大鼠PCNA表达高于假手术组（P〈0.01）,虽低于模型组,但差异无显著性意义（P〉0.05）。结论：补阳还五汤有效组分生物碱和苷类均可抑制血管内皮剥脱后的血管内膜增生,可能为补阳还五汤抗血管内膜增生的药效物质基础之一,其抗血管内膜增生的作用可能与降低PCNA表达有关。

Effects of Buyang Huanwu Decoction and its alkaloids and glycosides on aortic intimal hyperplasia and expression of proliferating cell nuclear antigen in rats with aortic intimal injuries

Objective: To explore the effects of alkaloids and glycosides extracted from Buyang Huanwu Decoction (BYHWD), a compound of traditional Chinese herbal medicine, on aortic intimal hyperplasia and the expression of the proliferating cell nuclear antigen (PCNA) in rats with aortic intimal injuries. Methods: The vessel restenosis model was established by denuding aortic endothelium with domestic balloon catheter in rats. Drugs were administered intragastrically on the first day after operation. The injured segments of aorta were taken on the fifteenth day after operation to determine the degree of intimal hyperplasia and observe the expression of PCNA. Results: Aortic intimal hyperplasias were very obvious on the fifteenth day after operation. The media hyperplasias in the drug-treated groups were not significant (P>0.05), but the intimal hyperplasia were remarkable as compared with that in the sham-operated group (P<0.01). The degrees of intimal hyperplasia in BYHWD, alkaloids, glycosides and atorvastatin groups were less than that in the untreated group (P<0.01). There was significant difference of PCNA expression between the untreated group and the sham-operated group (P<0.01). The expressions of PCNA in alkaloids, glycosides, and atorvastatin groups were higher than that in the sham-operated group (P<0.01, P<0.05), but still lower than that in the untreated group (P<0.01). The expression of PCNA in BYHWD group was higher than that in the sham-operated group (P<0.01), and no significant difference was found between the BYHWD group and the untreated group (P>0.05). Conclusion: Alkaloids and glycosides extracted from BYHWD can inhibit intimal hyperplasia induced by denuding arterial endothelium with domestic balloon catheter in rats. Alkaloids and glycoside may be among basal substances in BYHWD inhibiting intimal hyperplasia of blood vessel, the effect of which may relate to down-regulating the expression of PCNA.