科研之友
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摘要
Objective: To investigate the effect of Modified Xiaochaihu Decoction(MXD, 加味小柴胡汤) on collagen degradation in rats with chronic pancreatitis(CP). Methods: Rats were injected dibutyltin dichloride(DBTC, 7 mg/kg of body weight) into the right caudal vein to induce CP model. Thirty heallhy male Wistar rats were randomly divided into three groups by a random number table: the control, the model and the treatment groups. Rats of treatment group were administered MXD(10 g/kg of body weight) orally once daily starting from the day post-model establishment. Pancreatic tissues were harvested after 28-day feeding and fibrosis was evaluated by picro-sirius red staining. The contents of collagen type Ⅰ and Ⅲ were detected using enzymelinked immunosorbent assay(ELISA), the expression of matrix metalloproteinase 13(MMP13) and tissue inhibitor of metalloproteinase 1(TIMP1) was analyzed by Western blot and real-time polymerase chain reaction(PCR). Results: The fibrosis scoring of pancreatic tissues, the concentrations of collagen type Ⅰ and Ⅲ, the expression levels of MMP13 and TIMP1 proteins and mRNA in the model group were all increased compared with the control group(P<0.05). After treatment with MXD, the fibrosis scoring of pancreatic tissues, the concentrations of collagen type Ⅰ and Ⅲ, the expression levels of MMP13 proteins and m RNA in the teatment group were all decreased compared with the model group(P<0.05), but there were no significant differences in the expression levels of TIMP1 proteins and m RNA(P>0.05). Conclusion: MXD could promote collagen degradation and reverse pancreatic fibrosis in CP rats via a mechanism involve up-regulation of MMP13 expression.
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