丹参多酚酸盐预防大鼠术后肠粘连的机制

目的:研究丹参多酚酸盐预防大鼠术后肠粘连的作用并探讨其机制。方法:雄性SD大鼠50只,随机分为5组:正常对照组、模型组和丹参多酚酸盐低、中、高剂量组。除正常对照组外,其余大鼠均制备肠粘连模型。正常对照组和模型组每天腹腔注射葡萄糖;丹参多酚酸盐低、中、高剂量组每天腹腔注射丹参多酚酸盐,连续注射8d。各组于术后第8天取血,肉眼观察肠粘连的程度分级;取盲肠与腹壁粘连组织做病理观察;酶联免疫吸附法测定细胞因子白细胞介素-1β(interleukin-1β,IL-1β)、白细胞介素-4(interleukin-4,IL-4)及肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平。结果:丹参多酚酸盐能显著减轻大鼠的肠粘连程度,明显降低肠粘连大鼠IL-1β和TNF-α的表达水平,抑制纤维结缔组织的增生,但对IL-4的表达水平几乎没有影响。结论:丹参多酚酸盐可减轻大鼠肠粘连程度,降低IL-1β和TNF-α的表达水平,抑制纤维结缔组织的增生,这可能是其预防肠粘连的机制。

Mechanism of salvianolate in preventing postoperative intestinal adhesion in rats

OBJECTIVE: To observe the effects of salvianolate on rats with postoperative intestinal adhesion and to explore the prevention mechanism. METHODS: Forty SD male rats with intestinal adhesion were randomly divided into four groups: untreated group, low-dose salvianolate-treated group (12 mg/kg), medium-dose salvianolate-treated group (24 mg/kg) and high-dose salvianolate-treated group (48 mg/kg), with another ten SD male rats as normal control. Intraperitoneal injection of glucose was administered to the rats in the normal control group and the untreated group, and intraperitoneal injection of salvianolate was administered to the rats in the low-, medium- and high-dose salvianolate-treated groups. They were all treated for 8 days and once a day. On the eighth day after surgery the blood samples of each group were collected. Grades of intestinal adhesion were ranked by macroscopic observation. The adhesive tissues between viscera and belly wall were taken for pathological observation. The levels of interleukin-1beta (IL-1beta), interleukin-4 (IL-4) and tumor necrosis factor-alpha (TNF-alpha) were determined by enzyme linked immunosorbent assay. RESULTS: Salvianolate can significantly reduce the extent of postoperative intestinal adhesion, obviously decrease the levels of IL-1beta, TNF-alpha and inhibit the hyperplasy of fibrous connective tissue. However, there was no significant impact on the level of IL-4. CONCLUSION: Salvianolate can reduce the extent of postoperative intestinal adhesion, decrease the expression of IL-1beta and TNF-alpha and inhibit the hyperplasy of fibrous connective tissue. This may be the mechanism of salvianolate in preventing intestinal adhesion.