基质金属蛋白酶-11协同14促进乳腺癌发展

Matrix metalloproteinases-11 collabrotive matrix metalloproteinases-14 promote development of breast carcinoma

目的:检测基质金属蛋白酶-11和14(MMP-11和MMP-14)在乳腺癌中的表达,探讨MMP-11对乳腺癌细胞迁移、侵袭能力的影响。方法:检测MMP-11和MMP-14在161例浸润性乳腺癌和10例正常乳腺组织中的表达;运用小干扰RNA(siRNA)将高表达MMP-11的MB-231细胞抑制MMP-11,运用Transwell小室测定其迁移和侵袭力。结果:MMP-11和MMP-14在161例乳腺癌组织中高表达(分别为122/161及149/161),两者均与乳腺癌淋巴结转移和TNM分期相关,并且MMP-11与MMP-14呈正相关,差异均有统计学意义(P<0.05);MMP-11被成功干扰后,MB-231细胞中MMP-11和MMP-14表达同时降低,并且细胞迁移、侵袭能力明显减弱,差异均有统计学意义(P<0.05)。结论:MMP-11和MMP-14均与乳腺癌侵袭转移相关,并且MMP-11被抑制后,能下调MMP-14从而抑制乳腺癌细胞迁移和侵袭能力,它们可能成为判断乳腺癌预后的分子标志物及临床治疗靶点之一。

Objective： To investigate the expression pattern of MMP-11 and MMP-14 in breast carcinoma,and the effect of MMP-11 on breast carcinoma cell migration and invasion. Methods： MMP-11 and MMP-14 expression were examined in 161 invasive breast carcinoma tissue samples and 10 normal breast tissue samples. siRNA was used to knockout MMP-11 in breast carcinoma cell line MB-231 and Transwells were used to evaluate changes in migration ability and invasion ability. Results： Both MMP-11 and MMP-14 were highly expressed in breast carcinoma samples,122 and 149 samples out of 161,respectively. The expression of both proteins were correlated with lymph node metastasis and TNM staging. After knockout of MMP-11,the expression of both proteins decreased in MB-231 cell line and experiments show that the cell＇s migration and invasion abilities were significantly weakened. Conclusion： MMP-11 and MMP-14 could promote invasion and metastasis of breast carcinoma. Knockout of MMP-11 results in the downregulated expression of MMP-14,and the inhibition of breast carcinoma cell＇ s migration and invasion. They could be potential prognostic markers and treatment targets for of breast carcinoma.