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....
详细信息
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 SD乳鼠心肌成纤维细胞(CFs)和成年SD大鼠脾脏调节性T细胞(Tregs)体外共培养,探讨二者相互作用,并观察依普利酮(EPL)对其的影响。方法免疫磁珠法分选大鼠Tregs,差速贴壁法分选大鼠CFs,分为CFs、CFs+Tregs、CFs+Tregs+EPL(30μmol·L^(-1))、Tregs组。孵育后,CCK-8法检测CFs的增殖情况;ELISA法检测CFs分泌Ⅰ型胶原、Ⅲ型胶原和基质金属蛋白酶2(MMP-2)的蛋白相对表达水平;RT-q PCR检测Tregs的Kv1.3、KCa3.1、CRAC通道mRNA的相对表达水平;In-Cell Western blot法检测Tregs的Kv1.3通道蛋白质的表达水平。结果共培养48 h后,CFs增殖趋稳,共培养组CFs增殖明显(P<0.01),EPL可明显抑制其增殖(P<0.01);CFs分泌的Ⅰ型、Ⅲ型胶原和MMP-2的相对表达水平均明显增加(P<0.01),EPL可明显抑制其增加(P<0.01);Tregs的Kv1.3、KCa3.1、CRAC通道mRNA的相对表达水平分别增加6.95、1.99、1.53倍(CFs+Tregs vs Tregs,P<0.01),EPL明显抑制Kv1.3、KCa3.1 mRNA的表达(CFs+Tregs+EPL vs CFs+Tregs,P<0.01),其中Kv1.3通道的抑制最为明显;Tregs的Kv1.3通道蛋白增加了67.9%(CFs+Tregs vs Tregs,P<0.01),EPL可明显抑制其表达(P<0.01)。结论体外Treg与CFs共培养48h后,Tregs能明显促进CFs的增殖,EPL可以通过下调Tregs细胞膜上Kv1.3通道的表达,抑制Tregs的活化/增殖,间接抑制心肌纤维化。
暂无评论