中文摘要：

目的：研究乳腺癌生成过程中,Wnt 家族成员表达的变化规律.方法：收集自发乳腺癌小鼠42只,记录其详细资料.采用基因芯片筛选正常TA2小鼠乳腺组织和自发乳腺癌TA2小鼠乳腺癌组织中的差异表达基因,随后用Real-time PCR 进行验证,并检测TA2小鼠乳腺癌形成过程中相关基因表达的变化.结果：TA2自发乳腺癌小鼠平均见瘤年龄为（336.706±85.05）d,平均分娩次数为（3.767±1.79）次.分娩次数最多者为7次,其平均见瘤年龄只有251.5 d. TA2小鼠基因芯片结果发现Wnt家族成员中,Wnt1、Wnt10b、Wnt5a、Wnt5b在正常乳腺组织和乳腺癌组织中表达具有差异.Real time PCR 的结果证实了以上结果,并发现 Wnt1、Wnt10b、Wnt5a 在癌前病变和乳腺癌组织中表达高于正常乳腺组织,而 Wnt5b 在乳腺癌组织中表达低于正常乳腺组织.结论：Wnt1、Wnt5a、Wmt10b在TA2小鼠乳腺癌生成过程中起促进作用,而Wnt5b的作用可能是抑制小鼠乳腺癌的生成.

英文摘要：

Objective： This work aims to investigate the dynamic gene expression of Wnt family members in the oncogenesis of breast cancer in Tianjin albino 2 strain （TA2） mice. Methods： Clinical specimens of spontaneous breast cancers were harvested from 42 female TA2 mice, and mammary glands were collected from tissues of normal and pregnant TA2 mice. A gene chip was used to identify the dif-ferentially expressed genes between the tissues of breast cancer and the normal mammary gland. They were subsequently validated by real-time polymerase chain reaction and the change in the Wnt expressions in the oncogenesis of breast cancer in TA2 mice. Results： The average age of the TA2 mice at carcinogenesis was 336.706 ± 85.05 d, and the average frequency of delivery was 3.767 ± 1.79. Compared with the mammary gland of the normal TA2 mice, Wnt1, Wnt5a, and Wnt10b were obviously up-regulated in the breast cancer tissue of the TA2 mice. However, the expression of Wnt5b was down-regulated in the normal mammary gland and the breast cancer tissues of the TA2 mice. Conclusion： Wnt1, Wnt5a, and Wnt10b may promote the progression of breast cancer, whereas Wnt5b may inhibit the development of TA2 breast cancer.