Expression of telomerase genes in cancer development in atypical hyperplasia of the mammary duct  

乳腺导管非典型增生上皮细胞癌变过程中端粒酶基因表达的研究(英文)

作　　者：宋敏[1] 米小轶[1] 李柏林[1] 朱继江[1] 高英贤[1] 崔爽[1] 宋继谒[1] 

机构地区：[1]中国医科大学基础医学院病理学教研室,沈阳110001

出　　处：《Chinese Medical Journal》2002年第8期1221-1225,155,共5页中华医学杂志（英文版）

基　　金：ThisstudywassponsoredbyLiaoningNaturalScienceFoundation(No 0 0 2 0 3 7)

摘　　要：OBJECTIVE: To investigate telomerase gene expression in precancerous mammary lesion, such as atypical ductal hyperplasia and breast cancer and to study the relationship between expression and malignant transformation. METHODS: Expression of human telomerase genes (hTR) and human reverse transcriptase gene (hTRT) in 76 cases of mammary tissue was evaluated using in situ hybridization and included 50 cases of mammary hyperplasia, 6 of which were benign hyperplasia, 9 were mild atypical hyperplasia, 12 were moderate atypical hyperplasia, 23 were severe atypical hyperplasia and 26 were mammary cancer. RESULTS: The expressions of hTR and hTRT mRNA were much weaker or negative in benign hyperplasia (16.6%, 0), weak to mild　moderate in atypical hyperplasia (22.2%, 11.1%, 33.3%, 25.0%), strong in severe atypical hyperplasia (60.9%, 52.1%), and significantly strong in mammary cancer (88.5%, 80.8%).The difference between mild-moderate atypical hyperplasia, invasive ductal carcinoma and severe atypical hyperplasia was significant (P 0.05). CONCLUSION: Telomerase genes (hTR and hTRT) expressions are related to the transformation of atypical hyperplasia. Activated telomerase may play a role in mammary cancer development.目的　观察端粒酶基因在乳腺癌前病变 乳腺导管非典型增生及乳腺癌中的表达 ,探讨其与恶性转化的关系。方法　应用原位杂交方法评价端粒酶基因hTR和hTRT在 5 0例乳腺增生组织 (其中乳腺单纯性增生 6例 ,轻度非典型增生 9例 ,中度非典型增生 12例 ,重度非典型增生 2 3例 )及 2 6例乳腺癌中的表达。结果　在乳腺导管单纯性增生组织中端粒酶基因 (hTR、hTRTmRNA)呈弱表达 (16 6 % )或表达阴性。在乳腺导管轻、中度非典型增生组织中端粒酶基因 (hTR、hTRTmRNA)呈弱表达 (2 2 2 % ,11 1% ;33 3% ,2 5 0 % ) ,在乳腺导管重度非典型增生组织中端粒酶基因 (hTR、hTRTmRNA)表达增强 (6 0 9% ,5 2 1% ) ,在乳腺癌组织中端粒酶基因(hTR、hTRTmRNA)呈较强阳性表达 (88 5 % ,80 8% )。乳腺导管重度非典型增生组织中的端粒酶基因表达与在轻中度非典型增生、乳腺浸润性导管癌组织中的表达比较差异显著 (P <0 0 5 ) ,但与导管内癌表达无显著差异(P >0 0 5 )。结论　端粒酶基因hTR、hTRT的表达与乳腺导管非典型增生细胞的恶性转化有关 。

关 键 词：Breast Breast Neoplasms DNA-Binding Proteins Female Gene Expression Humans Precancerous Conditions RNA RNA  Messenger Research Support  Non-U.S. Gov't TELOMERASE 

分 类 号：R737.9[医药卫生—肿瘤]