摘要
目的 观察肌上皮细胞在乳腺不典型增生及乳腺癌中的变化。方法 用免疫组化SP法分别检测正常乳腺组织、Ⅰ级一般性增生和Ⅱ级、Ⅲ级不典型增生乳腺组织及乳腺癌组织中肌动蛋白的表达情况,并用电镜观察肌上皮细胞超微结构的变化。结果 正常乳腺组织和Ⅰ级一般性增生乳腺组织中肌动蛋白只在肌上皮细胞中表达,在上皮细胞中未见表达; 而Ⅲ级不典型增生及乳腺癌组织上皮细胞中肌动蛋白表达阳性率分别为70%(7/10)和90%(9/10),明显高于Ⅱ级不典型增生的10%(1/10),P<0.01。乳腺不典型增生时肌上皮细胞数目增多,排列紊乱,电镜下可见: ①细胞表面的棒状突起消失; ②Ⅱ、Ⅲ级不典型增生时胞浆内的肌微丝和吞饮小泡减少; ③细胞核增大,不规则,异染色质增多。结论 乳腺不典型增生时肌动蛋白表达的变化可能与乳腺癌的发生有关,肌上皮细胞可能参与了乳腺癌的发生。
Objective To investigate the changes of myoepithelial cells in mammary atypical hyperplasia and breast cancer. Methods SP immunohistochemistry was used to detect actin expression in normal breast tissue, grade Ⅰ, Ⅱ and Ⅲ atypical hyperplasia and breast cancer. Electromicroscopy was used to observe the changes of ultrastructure of myoepithelial cells. Results Actin was only detected in myoepithelial cells of normal breast tissue and grade Ⅰand Ⅱ atypical hyperplasia. The positive expression rates of actin in grade Ⅲ atypical hyperplasia(70%) and breast cancer(90%) were significantly higher than that in grade Ⅱ atypical hyperplasia(10%), P <0.01. In mammary atypical hyperplasia, the number of myoepithelial cells increased with disturbed alignment and abnormal ultrastructure. The changes included that the protrusions on the cell surface diminished, myofilaments and pinosomes in the myoepithelial cells of grade Ⅱ, Ⅲ atypical hyperplasia decreased, and the irregularity of the nuclear morphosis and the increase of nuclear heterochromosome were found. Conclusion The changes of actin expression in atypical hyperplasia are possibly correlated with carcinogenesis of breast cancer, and myoepithelial cells may play a role in carcinogenesis of breast cancer.
出处
《中国普外基础与临床杂志》
CAS
2005年第3期231-234,共4页
Chinese Journal of Bases and Clinics In General Surgery
