血管内皮生长因子和碱性成纤维细胞生长因子缓释微球联合高压氧对超长随意皮瓣成活的影响

目的 探讨血管内皮生长因子（VEGF）和碱性成纤维细胞生长因子（bFGF）缓释微球联合高压氧对大鼠超长随意皮瓣成活率的影响.方法 采用改良的McFarlane皮瓣制作方法建立实验模型.模型制备后将SD大鼠40只随机分为4组（空白对照组、高压氧组、VEGF/bFGF微球组、高压氧与微球联合组）,每组各10只,分别给予不同的干预处理.术后7d计算各组皮瓣的存活面积比,取皮瓣中段组织计算新生微血管数量,免疫组化法检测VEGF表达的差异.结果 （1）存活面积百分比：术后7d,高压氧与微球联合组皮瓣的存活面积百分比为（89.54±3.23）％,VEGF/bFGF微球组为（73.54±4.57）％,高压氧组为（71.89±2.26）％,空白对照组为（50.36±2.37）％,4组经方差分析,差异有统计学意义（F=390.328,P＜0.05）,组间两两比较,高压氧与微球联合组显著高于其他实验组,差异有统计学意义（P均＜0.05）;而VEGF/bFGF微球组和高压氧组间则无统计意义（P＞0.05）.（2）新生微血管数目：高压氧与微球联合组、VEGF/bFGF微球组、高压氧组和空白对照组皮瓣Ⅱ区的新生血管计数分别为（35.14±4.21）、（23.34 ±2.53）、（25.22 ±2.73）、（17.37±5.73）个/mm2,4组经方差分析,差异有统计学意义（F=51.736,P＜0.05）,组间两两比较,高压氧与微球联合组显著高于其他实验组,差异有统计学意义（P均＜0.05）;VEGF/bFGF微球组与高压氧组间则无统计意义（P＞0.05）.（3）免疫组化检测：各组VEGF阳性量累积吸光度（A）值分别为78.39±19.12、52.42±13.59、49.84±12.93、29.24±10.35,4组差异有统计学意义（F=189.956,P＜0.05）,组间两两比较,高压氧与微球联合组显著高于其他实验组,差异有统计学意义（P均＜0.05）;而VEGF/bFGF微球组与高压氧组间差异则无统计意义（P＞0.05）.结论 VEGF和bFGF缓释微球联合高压氧可以促进皮瓣新生血管的增生,改善皮瓣血供,进而提

Effects of VEGF/bFGF sustained release microspheres combined with hyperbaric oxygen therapy on survival of uhralong random pattern flaps in rats

Objective To explore the effects of VEGF/bFGF sustained release microspheres combined with hyperbaric oxygen therapy on survival rates of uhralong random pattern flaps in rats.Methods Modified McFarlane flap rat models were randomly divided into 4 groups,VEGF/bFGF microspheres ＋ hyperbaric oxygen group,VEGF/bFGF microspheres group,hyperbaric oxygen group and control group.At the end of 7 days,survival rates of flaps were calculated （Survival rate =Survival area/total area × 100％）.The tissue samples were taken from middle portion of flaps to detect the neovascularization.Immunohistochemistry was used to detect the differential expression of VEGF.Results Seven days after the random pattern flap operation in rats,the survival rates of VEGF/bFGF microspheres combined with hyperbaric oxygen therapy experimental group,VEGF/bFGF microspheres experimental group,hyperbaric oxygen therapy experimental group,and control group were （89.54 ± 3.23） ％,（73.54 ± 4.57） ％,（71.89 ± 2.26） ％,（50.36 ± 2.37） ％ respectively.The neovascularization counts of each group in part Ⅱ were （35.14 ± 4.21）/mm2,（23.34 ± 2.53）/mm2,（25.22 ±2.73）/mm2 and （17.37 ± 5.73）/mm2 respectively.VEGF cumulative absorbance in VEGF/bFGF microspheres ＋ hyperbaric oxygen group,VEGF/bFGF microspheres group,hyperbaric oxygen group and control group were 78.39 ± 9.12,52.42 ± 13.59,49.84 ± 12.93,29.24 ± 10.35 respectively.In each experimental result group,there were significant difference between the combination group and the other groups （F =189.956,P ＜ 0.05）,but there was no significant difference between VEGF/bFGF microspheres experimental group and hyperbaric oxygen therapy experimental group.Conclusion VEGF/bFGF sustained release microspheres combined with hyperbaric oxygen therapy can promote flap neovascularization,increase the flap blood supply and then improve the survival of random pattern skin flaps.