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首页> 外文期刊>Biochemistry >Tissue Inhibitor of Metalloprotease-2 (TIMP-2): Bioprocess Development, Physicochemical, Biochemical, and Biological Characterization of Highly Expressed Recombinant Protein
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Tissue Inhibitor of Metalloprotease-2 (TIMP-2): Bioprocess Development, Physicochemical, Biochemical, and Biological Characterization of Highly Expressed Recombinant Protein

机译:金属蛋白酶酶组织抑制剂-2(TIMP-2):生物过程发育,物理化学,生物化学和高表达重组蛋白的生物学特性

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src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bichaw/2017/bichaw.2017.56.issue-49/acs.biochem.7b00700/20171206/images/medium/bi-2017-00700a_0008.gif">Tissue inhibitor of metalloprotease-2 (TIMP-2) is a secreted 21 kDa multifunctional protein first described as an endogenous inhibitor of matrix metalloproteinases (MMPs) that prevents breakdown of the extracellular matrix often observed in chronic diseases. TIMP-2 diminishes the level of growth factor-mediated cell proliferation in vitro, as well as neoangiogenesis and tumor growth in vivo independent of its MMP inhibitory activity. These physiological properties make TIMP-2 an excellent candidate for further preclinical development as a biologic therapy of cancer. Here we present a straightforward bioprocessing methodology that yields >35 mg/L recombinant human TIMP-2 6XHis-tagged protein (rhTIMP-2) from suspension cultures of HEK-293-F cells. Enhanced rhTIMP-2-6XHis yields were achieved by optimization of both TIMP-2 cDNA codon sequence and cell culture conditions. Using a two-step chromatographic process, we achieved >95% purity with minimal processing losses. Purified rhTIMP-2-6XHis was free of mouse antigen contamination. Circular dichroism spectroscopy indicated a well-folded rhTIMP-2-6XHis that is highly stable and refractory to pH changes. Two-dimensional heteronuclear single-quantum coherence nuclear magnetic resonance of full length rhTIMP-2-6XHis also indicated a monodisperse, well-folded protein preparation. Purified rhTIMP-2-6XHis inhibited MMP-2 enzymatic activity in a dose-dependent fashion with an IC50 of ~1.4 nM. Pretreatment of A549 lung cancer and JygMC(A) triple-negative breast cancer cells with rhTIMP-2-6XHis in low-nanomolar amounts inhibited EGF-induced proliferation to basal (unstimulated) levels. This study therefore not only offers a robust bioprocess methodology for rhTIMP-2 production but also characterizes critical physicochemical and biological a
机译:src =“http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bichaw/2017/bichaw.2017.56.issue-49/acs.biochem.7b00700/20171206/images/medium /bi-2017-00700a_0008.gif“金属蛋白酶酶 - 2(timp-2)的毒素抑制剂是分泌的21kda多官能蛋白首先描述为基质金属蛋白酶(mmps)的内源抑制剂,其防止经常观察到的细胞外基质的分解慢性疾病。 TIMP-2减少了体外生长因子介导的细胞增殖水平,以及体内的新生生成和肿瘤生长,与其MMP抑制活性无关。这些生理特性使TIMP-2成为进一步临床前发展的优异候选者,作为癌症的生物学治疗。在这里,我们提出了一种直接的生物处理方法,其从HEK-293-F细胞的悬浮培养物中产生> 35mg / L重组人TIMP-2 6xHis标记的蛋白质(rhtimp-2)。通过优化TiMP-2 cDNA密码子序列和细胞培养条件来实现增强的rhtimp-2-6xHis产率。使用两步色谱法,我们达到了> 95%纯度,加工损失最小。纯化的rhtimp-2-6xhis没有小鼠抗原污染。圆形二色谱表明,折叠的rhtimp-2-6xhis,对pH变化具有高度稳定和难治性。全长rhtimp-2-6xhis的二维异核单量子相干核磁共振还表明了单分散,折叠良好的蛋白质制剂。纯化的rhtimp-2-6xHis以剂量依赖性方式抑制MMP-2酶活性,其具有〜1.4nm的IC 50 。 A549肺癌和JYGMC(A)的预处理在低纳米摩尔量中具有rhtimp-2-6xhis的三重阴性乳腺癌细胞抑制EGF诱导的基础(未刺激)水平的增殖。因此,本研究不仅为rhtimp-2生产提供了坚固的生物过程方法,而且还表征了临界物理化学和生物A.

著录项

  • 来源
    《Biochemistry》 |2017年第49期|共11页
  • 作者单位

    Radiation Oncology Branch Center for Cancer Research National Cancer Institute Bethesda Maryland 20892 United States;

    Institute for Bioscience and Biotechnology Research National Institute of Standards and Technology and University of Maryland 9600 Gudelsky Drive Rockville Maryland 20850 United States;

    Radiation Oncology Branch Center for Cancer Research National Cancer Institute Bethesda Maryland 20892 United States;

    Radiation Oncology Branch Center for Cancer Research National Cancer Institute Bethesda Maryland 20892 United States;

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  • 正文语种 eng
  • 中图分类 生物化学;
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