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乳腺癌中STAT3调节基质金属蛋白酶表达与上皮间质转化的关系 被引量:6

STAT3 of breast cancer cells regulates matrix metallproteinases and tissue inhibitor of metalloproteinase-1expression and its relationship with epithelial-mesenchymal transition
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摘要 目的探讨乳腺癌中STAT3和基质金属蛋白酶(MMP)-2、MMP-9及其组织抑制剂TIMP-1的表达与上皮间质转化(EMT)的关系及其临床意义。方法应用反转录聚合酶链反应(R-PCR)技术检测30例新鲜乳腺浸润性导管癌与对应癌旁正常乳腺组织STAT3基因mRNA的表达,并以免疫组织化学Envision二步法方法检测84例乳腺浸润性导管癌组织及对照组35例癌旁正常乳腺组织pSTAT3和MMP-2、MMP-9及TIMP-1蛋白的表达。结果乳腺癌组织中STAT3mRNA相对定量显著高于癌旁正常乳腺组织(t=4.513,P=0.000);pSTAT3、MMP-2、MMP-9及TIMP-1蛋白在乳腺癌组织中的阳性表达率明显高于对照组,二者比较差异有统计学意义(均Pd0.05),乳腺癌组织中pSTAT3表达与MMP-2、MMP-9及TIMP-1的表达呈正相关(均P〈0.05);pSTAT3、MMP-2在乳腺浸润性导管癌不同组织学分级、有或无淋巴结转移组间的阳性表达率均差异有统计学意义(P%0.05);MMP-9阳性表达率在有、无乳腺癌淋巴结转移组间差异有统计学意义(Pd0.05),但在不同组织学分级组间表达差异无统计学意义(P〉0.05);TIMP-1的阳性表达率在不同乳腺癌组织学分级及有、无淋巴结转移组间均无统计学意义差异(P〉0.05)。在不同年龄、肿瘤大小组间比较,上述蛋白的阳性表达率均无差异(P〉0.05)。结论STAT3在乳腺癌中高表达与MMP-2、MMP-9及其抑制剂TIMP-1表达上调关系密切;活化的STAT3可能通过调节MMP-2、MMP-9的表达介导EMT过程,从而促进乳腺浸润性导管癌的侵袭转移。 Objective To investigate the relationship of STAT3 with expressions of MMP-2, MMP-9 and TIMP-1 and with epithelial-mesenchymal transition (EMT) in breast cancer cells, and to explore the clinical significances. Methods The mRNA of STAT3 and the protein expressions of pSTAT3, MMP-2, MMP-9 and TIMP-1 of breast cancer ceils in 84 patients with breast cancer were determined by real-time RT-PCR technique and immunohistochemical method in paraffin-embedded specimensm respectively. Normal breast tissues adjacent to breast cancer were taken as controls. Results mRNA expression of STAT3 was significantly higher in breast cancer tissues than in controls (t= 4. 513, P〈 0. 001). Protein expressions of pSTAT3, MMP-2, MMP-9 and TIMP-1 were higher in breast cancer tissues than in controls (all P〈 0.05). There were positive correlations between pSTAT3 expression and the expressions of MMP-2, MMP-9 and TIMP-1 in breast cancer tissues (all P〈0.05). The higher levels of pSTAT3 and MMP-2 were associated with poorer differentiation and more lymph node metastasis of breast cancer (both P〈0.05). The positive expression of MMP-9 was correlated with lymph node metastasis (P〈0.05), but not with histological grading (P〉0.05). The positive expression of TIMP-1 had no associations with histological grading and lymph node metastasis(both P〉0.05). There were no significant differences in the protein expressions level of pSTAT3, MMP-2, MMP-9 and TIMP-1 between different ages and different breast tumor sizes (all P〉0.05). Conclusions The increased expression of STAT3 in breast cancer cells is closely correlated with the increased expressions of MMP-2, MMP-9 and STAT3 inhibitor TIMP-1. The activation of STAT3 gene can mediate EMT by inducing the protein expressions of MMP-2, MMP -9 , which promotes the invasion and metastasis of breast cancer.
出处 《中华老年医学杂志》 CAS CSCD 北大核心 2014年第3期286-289,共4页 Chinese Journal of Geriatrics
基金 温州市科技计划(Y20100256)
关键词 乳腺肿瘤 STAT3转录因子 基质金属蛋白酶类 金属蛋白酶一1组织抑制剂 细胞转化 肿瘤 Breast neoplasms STAT3 transcription factor Matrix metalloproteinases Tissue inhibitor of metalloproteinase-l Cell transformation neoplastic
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参考文献11

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共引文献16

同被引文献53

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