中文摘要：

目的探讨己酮可可碱（PTX）对内毒素血症大鼠胃黏膜损伤的保护作用。方法Wistar大鼠30只随机分为三组：假手术对照组、内毒素组和PTX治疗组，每组10只。检测胃黏膜细胞间黏附分子-1（ICAM-1）表达，并测定各组动物血清TNF—α、IL-1β水平。结果内毒素组ICAM．1表达与假手术组比较明显增高（P〈0．01），其血清TNF-α和IL-1β水平与假手术组比较也明显增高（P〈0．01）。PTX治疗后，该组血清TNF-α、IL-1β水平和胃黏膜组织ICAM-1蛋白表达与内毒素组比较明显减弱（P〈0．01）。结论ICAM-1和TNF-α、IL-1β在内毒素急性胃黏膜损伤发病机制中起重要作用，PTX可以降低血循环TNF-α、IL-1β水平和下调胃黏膜组织中ICAM-1表达，减轻内毒素对胃黏膜上皮组织的损伤，保护胃黏膜。

英文摘要：

Objective To investigate the protective effects of pentoxifylline on gastric mucosal injury in rats with endotoxemia. Methods 30 Wistar rats were randomly divided into 3 groups ： sham operated control group （ C group）, LPS group and PTX group. The serum tumor necrosis factor-α（TNF-α） and interleukin-1β（ IL-1 β） levels in each group were measured. The immunohistoehemistry was used to assess the expression of the ICAM-1 in the gastric mueosal tissues. Results The levels of TNF-α and IL-1β in serum in LPS group were higher than those in C group （ P 〈 0. 01 ）. The level of ICAM-1 in the gastric mucosal tissues in LPS group was higher than those in sham operated control group（ P 〈 0. 01 ）. After PTX treatment, the levels of TNF-α and IL-1β in serum in PTX group were lower than those in LPS group（P 〈0. 01 ） and the level of ICAM-1 in the hepatic tissues in PTX group was also lower than those in LPS group（ P 〈 0. 01 ）. Conclusions TNF-α, IL-1β and ICAM-1 take part in the progress of gastric mucosal injury in rats with endotoxemia. PTX can eliminate the gastric mucosa injury and protect the gastric mucosal tissues by downregulating the levels of TNF-α, IL-1βand ICAM-1.