摘要目的 探讨动物模型术后即刻应用转化生长因子β1(TGFβ1)中和抗体对纤维包膜形成的作用机制,同时观察不同浓度的TGF-β1中和抗体影响作用的差异.方法 将45只大鼠随机分为3组:对照组、TGF25组和TGF50组,每组15只.大鼠背部肩胛区皮下植入10 ml光面圆形硅胶假体.TGF25组和TGF50组植入假体后即刻假体周围分别注射250 μg/ml及500 μg/ml TGF-β1抗体0.1 ml,对照组注射磷酸缓冲液(PBS) 0.1 ml.于术后第7,14,28天分别取材,测量包膜厚度;检测胶原密度;检测TGF-β1、α-平滑肌肌动蛋白(α-SMA)、纤维连接蛋白(FN)的表达.结果 28 d时,对照组包膜厚度明显高于实验组,其与TGF25组的差异有统计学意义(P＜0.05);TGF-β1的表达及α-SMA阳性成纤维细胞数在对照组显著高于TGF25组和TGF50组,差异有统计学意义(P＜0.05);对照组FN表达量及胶原密度略高于TGF25组和TGF50组,但在各时间点3组间差异均无统计学意义(P＞0.05).结论 在植入假体的即刻局部应用TGF-β1中和抗体可以从一定程度上减轻包膜的厚度,抑制包膜挛缩.

abstractsObjective To study the effects and mechanism of immediate application of transformation growth factor beta 1 (TGF-β1) neutralizing antibody postoperatively to prevent the fibrous capsule formation in animal model,and to observe the different effects between two concentrations of TGF-β1 neutralizing antibody.Methods Ten ml of smooth round silicone prostheses were implanted subcutaneously in the back of rats.Then 25 μg/0.1 ml or 50 μg/0.1 ml TGF-β1 neutralizing antibody were injected around the implanted prostheses in the experimental group,while the control group was injected with PBS 0.1 ml.On day 7,14 and 28,the thickness of capsule measured;The density of collagen;and the expression of TGF-β1,alpha smooth muscle actin (α-SMA),and fibronectin (FN) was detected.Results After 28 days,the average capsule thickness of the control group was significantly higher in the experimental group,and the difference between the control group and the 25 μg experimental group had statistical significance.TGF-β1 expression and the number of α-SMA positive fibroblasts in control group were significantly higher than that in the experimental group,the difference was statistically significant.In the control group,the expression of FN and collagen density was slightly higher than the two experimental groups,but the differences among the three groups showed no statistical significance at each time point.Conclusions Immediate application of the TGF beta 1 neutralizing antibody in the the implant prosthesis can reduce the thickness of the capsule to some extent.