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首页> 外文期刊>Biochemistry >Tumor-associated trypsinogen-2 (trypsinogen-2) activates procollagenases (MMP-1, -8, -13) and stromelysin-1 (MMP-3) and degrades type I collagen.
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Tumor-associated trypsinogen-2 (trypsinogen-2) activates procollagenases (MMP-1, -8, -13) and stromelysin-1 (MMP-3) and degrades type I collagen.

机译:肿瘤相关的胰蛋白酶原2(trypsinogen-2)激活前胶原(MMP-1,-8,-13)和基质溶菌素1(MMP-3),并降解I型胶原。

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摘要

A critical step in cancer growth and metastasis is the dissolution of the extracellular matrix surrounding the malignant tumor, which leads to tumor cell invasion and dissemination. Type I collagen degradation involves the initial action of collagenolytic matrix metalloproteinases (MMP-1, -8, and -13) activated by MMP-3 (stromelysin-1). The role of interactive matrix serine proteinases (MSPs), including tumor-associated trypsinogens, has been unclear in collagenolysis. Now, we provide evidence that the major isoenzyme of human tumor-associated trypsinogens, trypsin-2, can directly activate three collagenolytic proMMPs as well as proMMP-3. These proMMP activations are inhibited by tumor-associated trypsin inhibitor (TATI). Furthermore, we demonstrate that trypsin-2 efficiently degrades native soluble type I collagen, which can be inhibited by TATI. However, cell culture studies showed that trypsin-2 transfection into the HSC-3 cell line did not result in MMP-1, -3, -8, and -13 activation but affected MMP-3 and -8 production at the protein level. These findings indicate that human trypsin-2 can be regarded as a potent tumor-associated matrix serine protease capable of being the initial activator of the collagenolytic MMP activation network as well as directly attacking type I collagen.
机译:癌症生长和转移中的关键步骤是溶解恶性肿瘤周围的细胞外基质,这导致肿瘤细胞浸润和扩散。 I型胶原蛋白降解涉及由MMP-3(基质溶素1)激活的胶原蛋白水解基质金属蛋白酶(MMP-1,-8和-13)的初始作用。相互作用的基质丝氨酸蛋白酶(MSPs),包括肿瘤相关的胰蛋白酶原,在胶原蛋白溶解中的作用尚不清楚。现在,我们提供证据表明,人类肿瘤相关的胰蛋白酶原的主要同工酶胰蛋白酶2可以直接激活三种胶原分解proMMPs和proMMP-3。这些proMMP激活被肿瘤相关胰蛋白酶抑制剂(TATI)抑制。此外,我们证明胰蛋白酶2有效降解天然可溶性I型胶原蛋白,可以被TATI抑制。但是,细胞培养研究表明,胰蛋白酶2转染到HSC-3细胞系中不会导致MMP-1,-3,-8和-13活化,但会在蛋白质水平上影响MMP-3和-8的产生。这些发现表明,人胰蛋白酶2可以被认为是一种有效的肿瘤相关基质丝氨酸蛋白酶,能够作为胶原蛋白水解MMP激活网络的初始激活剂,并直接攻击I型胶原蛋白。

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