【摘要】 目的 :研究转化生长因子 (TGFα)在中耳胆脂瘤中的表达 ,探讨TGFα在胆脂瘤上皮细胞增生中的可能作用。方法 :31例胆脂瘤上皮标本及 10例正常外耳道皮肤组织标本制成石蜡切片 ,应用免疫组化 (S P)染色法检测上述两种标本中TGFα的表达情况 ,并采用多媒体彩色图文分析系统 ,对染色结果进行定量分析。结果 :TGFα阳性表达定位于胞浆 ,胆脂瘤上皮组织均呈中等阳性或强阳性反应 ,2 1例标本呈现从基底层向角质层染色逐渐增强的趋势 ,皮下结缔组织中可见散在的阳性细胞 ,主要为成纤维细胞、单核 巨噬细胞、浆细胞 ,少数为淋巴细胞 ;外耳道皮肤组织的阳性反应集中在表皮层 ,其中 8例标本表现为表皮全层稀疏均一的弱阳性表达。胆脂瘤上皮和正常外耳道表皮的TGFα积分吸光度分别为 2 .4 31± 0 .5 87及 1.4 6 3± 0 .14 7,两者差异有显著性意义(t’ =1.95 ,P <0 .0 5 )。结论 :胆脂瘤组织中TGFα的含量较正常皮肤组织显著增高 ,TGFα可能以自分泌和旁分泌机制参与胆脂瘤上皮增生的调节 ,局部炎症反应可能构成特殊微环境 ,诱发并维持胆脂瘤上皮的高度增生更多还原

【Abstract】 Objective:To investigate the mode of expression and distribution of transforming growth factor alpha in middle ear cholesteatoma.Method:The speciments from the cholesteatoma tissue of 32 cases and the normal external ear skin of 10 cases were examined by immunohistochemical S P method and computer image analysis.Result:In cholesteatoma epithelium staining for TGFα was consistently stronger than that in normal epithelium. The mean absorbance of the two epithelial tissue is 2.431 ± 0.587 and 1.463 ± 0.147 respectively, revealing a significant difference. Some immune cells infiltrating the stroma of cholesteatoma also stained positively for TGFα.Conclusion:These data suggested that an autocrine and paracrine stimulation of the squamous epithelium of cholesteatoma by TGF might contribute to its hyperproliferation.更多还原