摘要
This study was aimed to investigate the role of the delta-opioid receptor （DOR）-β-arrestinl-Bcl-2 signal transduction pathway in the pathogenesis of ulcerative colitis （UC） and the intervention effects of oxymatrine on UC. Forty Sprague-Dawley rats were divided into nor- mal group, model group, oxymatrine-treated group and mesalazine-treated group （n=10 each） at ran- dom. The rat UC model was established by intra-colonic injection of trinitrobenzene sulfonic acid in the model group and two treatment groups. The rats in oxymatrine-treated group were subjected to intramuscular injection of oxymatrine [63 mg/（kg·day）] for 15 days, and those in mesalazine-treated group given mesalazine solution [0.5 g/（kg·day）] by gastric lavage for the same days. Animals in normal group and model group were administered 3 mL water by gastric lavage for 15 days. On the 16th day, after fasting for 24 h, the rats were sacrificed for the removal of colon tissues. The expres- sion levels of DOR, β-arrestinl and Bcl-2 were determined in colon tissues by immunohistochemistry and real-time quantitative polymerase chain reaction （RT-PCR）, respectively. It was found that the expression levels of DOR, [3-arrestinl and Bcl-2 protein and mRNA were significantly increased in the model group as compared with the other groups （P〈0.05）. They were conspicuously decreased in both mesalazine-treated and oxymatrine-treated groups in contrast to the model group （P〈0.05）. No statistically significant difference was noted in these indices between mesalazine- and oxyma- trine-treated groups （P〉0.05）. This study indicated that the DOR-β-arrestinl-Bcl-2 signal transduc- tion pathway may participate in the pathogenesis of UC. Moreover, oxymatrine can attenuate the de- velopment of UC by regulating the DOR-β-arrestin 1-Bcl-2 signal transduction pathway.
This study was aimed to investigate the role of the delta-opioid receptor （DOR）-β-arrestinl-Bcl-2 signal transduction pathway in the pathogenesis of ulcerative colitis （UC） and the intervention effects of oxymatrine on UC. Forty Sprague-Dawley rats were divided into nor- mal group, model group, oxymatrine-treated group and mesalazine-treated group （n=10 each） at ran- dom. The rat UC model was established by intra-colonic injection of trinitrobenzene sulfonic acid in the model group and two treatment groups. The rats in oxymatrine-treated group were subjected to intramuscular injection of oxymatrine [63 mg/（kg·day）] for 15 days, and those in mesalazine-treated group given mesalazine solution [0.5 g/（kg·day）] by gastric lavage for the same days. Animals in normal group and model group were administered 3 mL water by gastric lavage for 15 days. On the 16th day, after fasting for 24 h, the rats were sacrificed for the removal of colon tissues. The expres- sion levels of DOR, β-arrestinl and Bcl-2 were determined in colon tissues by immunohistochemistry and real-time quantitative polymerase chain reaction （RT-PCR）, respectively. It was found that the expression levels of DOR, [3-arrestinl and Bcl-2 protein and mRNA were significantly increased in the model group as compared with the other groups （P〈0.05）. They were conspicuously decreased in both mesalazine-treated and oxymatrine-treated groups in contrast to the model group （P〈0.05）. No statistically significant difference was noted in these indices between mesalazine- and oxyma- trine-treated groups （P〉0.05）. This study indicated that the DOR-β-arrestinl-Bcl-2 signal transduc- tion pathway may participate in the pathogenesis of UC. Moreover, oxymatrine can attenuate the de- velopment of UC by regulating the DOR-β-arrestin 1-Bcl-2 signal transduction pathway.
基金
supported by grants from the National Nature Science Foundation of China(No.81072944,and No.81273908)
Nature Science Foundation of Hubei Province of China(No.2011CDB379)
Postdoctoral Science Foundation of China(No.2012M510120)
Doctor Fund Project of Higher Education of Ministry of Education of China(No.20110142120096)
