重组人碱性成纤维细胞生长因子对大、小鼠胃溃疡的影响<英文>

Effect of recombinant human basic fibroblast growth factor on stomach ulcers in rats and mice

目的:研究重组人碱性成纤维细胞生长因子(rh-bFGF)对实验性溃疡病的治疗作用。方法:采用大鼠和小鼠溃疡病模型,用图象分析仪进行形态计量,用显微镜观察病理组织学变化,用二苯胺法测DNA含量,用地衣酚法测RNA含量。结果:对大鼠醋酸性溃疡,rh-bFGF 2.5-40kU·kg^(-1)igbid缩小溃疡指数;最佳剂量为10kU·kg^(-1);量-效曲线呈钟型。rh-bFGF使溃疡边缘再生腺上皮宽度、肉芽组织内毛细血管密度及瘢痕组织内胶原含量提高;并促进再生腺体成熟与溃疡边缘组织RNA合成。对急性溃疡模型,rh-bFGF 5,10kU·kg^(-1)仅对大鼠幽门结扎型有效,但不影响胃液酸度及胃蛋白酶活性。结论:rh-bFGF ig或sc加速大鼠慢性胃溃疡愈合,并提高愈合质量。

AIM: To study the curative effects of recombinant human basic fibroblast growth factor (rh-bFGF) on gastric ulcer healing. METHODS: Pylorus ligated, water immersion stress-induced, reserpine-induced, and acetic acid-induced gastric ulcers in rats or mice were prepared. Morphometric analyses on ulcer were performed using microscope and true color image analysis system. The DNA and RNA contents were measured by diphenylamine method and orcinol method, respectively. RESULTS: In acetic acid-induced gastric ulcers in rats, rh-bFGF 2.5 - 40 kU·kg-1 ig accelerated the chronic ulcer healing with a bell-shaped dose-effect curve and the best dosage was 10 kU·kg-1. The regenerated gland epithelium width, density of capillaries in granulation tissue, and collagen content in scar tissues obviously increased in rh-bFGF-treated groups. Simultaneously, rh-bFGF promoted the differentiation and maturation of regenerated glands around ulcers. rh-bFGF 2-4 kU·kg -1 sc also increased the synthesis of RNA in ulcer tissues. In acute gastric ulcers, rh-bFGF ig was only effective on pylorus ligated ulcers, but showed no effect on total acid output and pepsin activity in gastric juice of rats. CONCLUSION: rh-bFGF promoted the gastric ulcer healing and improved the quality of gastric ulcer healing.