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MMP-9 and MMP-2 gelatinases and TIMP-1 and TIMP-2 inhibitors in breast cancer: correlations with prognostic factors

机译:乳腺癌中MMP-9和MMP-2明胶酶以及TIMP-1和TIMP-2抑制剂与预后的关系

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摘要

The goal of our study was to analyse the prognostic values for some matrix metalloproteinases (MMPs) and tissue inhibitors of matrix metalloproteinases (TIMPs) in breast cancer. We evaluated the activity and the expression levels of MMP-9, MMP-2, TIMP-1 and TIMP-2 in malignant versus benign fresh breast tumor extracts. For this purpose, gelatinzymography, immunoblotting and ELISA were used to analyse the activity and expression of MMPs and TIMPs. We found that MMP-9 expression level and activity are increased in malignant tumors. In addition, MMP-9/TIMP-1 and MMP-2/TIMP-2 ratio values obtained by us were significantly different in malignant tumors compared to benign tumors. We suggest that the abnormal MMP-9/TIMP-1 balance plays a role in the configuration of breast invasive carcinoma of no special type and also in tumor growth, while altered MMP-2/TIMP-2 ratio value could be associated with lymph node invasion and used as a prognostic marker in correlation with Nottingham Prognostic Index. Finally, we showed that in malignant tumors high expression of estrogen receptors is associated with enhanced activity of MMP-2 and increased bcl-2 levels, while high expression of progesterone receptors is correlated with low TIMP-1 protein levels.
机译:我们研究的目的是分析乳腺癌中某些基质金属蛋白酶(MMPs)和组织抑制剂金属基质金属蛋白酶(TIMPs)的预后价值。我们评估了恶性与良性新鲜乳腺肿瘤提取物中MMP-9,MMP-2,TIMP-1和TIMP-2的活性和表达水平。为此,使用明胶酶谱,免疫印迹和ELISA分析MMP和TIMP的活性和表达。我们发现在恶性肿瘤中MMP-9表达水平和活性增加。此外,与良性肿瘤相比,我们获得的MMP-9 / TIMP-1和MMP-2 / TIMP-2比率值在恶性肿瘤中有显着差异。我们建议异常的MMP-9 / TIMP-1平衡在无特殊类型的乳腺浸润癌的构型以及肿瘤的生长中起作用,而MMP-2 / TIMP-2比值的改变可能与淋巴结有关诺丁汉预后指数与预后指标相关。最后,我们表明在恶性肿瘤中,雌激素受体的高表达与MMP-2活性增强和bcl-2水平升高有关,而孕酮受体的高表达与TIMP-1蛋白水平低相关。

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