表皮生长因子与碱性成纤维细胞生长因子促进创面修复的比较研究

目的　比较重组人表皮生长因子 (rhEGF)与重组人碱性成纤维细胞生长因子 (rhbFGF)促进创面修复的效应及其作用机制。　方法　选用 12只大耳白兔 2 4只耳上的 72个创面 ,随机分为rhEGF(10 μg/cm2 )治疗组、rhbFGF(10 0AU/cm2 )治疗组和对照组 (涂以 1%磺胺嘧啶银霜 )。观察创面的愈合情况 ,分别取不同时段的标本进行病理学、电镜检查 ,并通过原位杂交检测标本中整合素 β1mRNA的表达情况。　结果　两治疗组整合素 β1mRNA的表达明显高于对照组 ;创面修复的时间明显比对照组快 ,且修复质量较对照组高 (P <0 .0 5 ) ;成纤维细胞数和毛细血管胚芽数与对照组比较差异有显著性意义 (P <0 .0 5 )。　结论　rhEGF、rhbFGF均能提高创面修复质量 ,在修复早、中期使用rhbFGF能促进肉芽组织生长 ;中、晚期使用rhEGF能加速创面的再上皮化。根据时效 ,联合应用rhEGF、rhbFGF可获得最佳效价比。

Comparison of the effects of rhEGF with rhbFGF on the acceleration of wound healing

OBJECTIVE: To investigate the mechanism and the accelerating effect of rhEGF and rhbFGF on wound healing. METHODS: Twelve New Zealand rabbits with 72 incised wounds on ventral side of 24 ears were randomly divided into two therapeutic groups (rhEGF of 10 ug/cm(2) and rhbFGF of 100 AU/cm(2)) and a control group (1% silver sulfadiazine cream, SD-Ag). The general conditions of the wound healing was observed grossly. Biopsies were harvested at different time points for the pathomorphological examination, the electron microscopic examination, and for assessment of integrin beta1 mRNA expression by in situ hybridization. RESULTS: The expressions of integrin beta 1 mRNA in two therapeutic groups were significantly higher than that of control group. The quality of the wound healing was improved in therapeutic group with its healing time shortened when compared with that in control group (P < 0.05). There was an obvious difference in the number of fibroblasts and capillary gemmules between the therapeutic and control groups (P < 0.05). CONCLUSION: The wound healing and quality could be improved by both rhEGF and rhbFGF, but rhbFGF seemed better to be employed during the early and middle stages of the wound repair for the growth of granulation tissue, while rhEGF should be applied at the late stage of wound repair to accelerate the re-epithelialization of the wound. Combined application of rhEGF with rhbFGF according to time effect could be more beneficial to the wound repair.