Trastuzumab 是一种人源化 IgG1 单克隆抗体，其以高亲和力与 HER2 选择性结合。Trastuzumab 可用于 HER2 阳性转移性乳腺癌和 HER2 阳性胃癌 的研究。

Trastuzumab is a humanized IgG1 monoclonal antibody for patients with invasive breast cancers that overexpress HER2. Trastuzumab has the potential for HER2 Positive Metastatic Breast Cancer and HER2 Positive Gastric Cancer research.

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Treatment of HER2-overexpressing breast cancer cell lines with Trastuzumab results in induction of p27KIP1 and the Rb-related protein, p130, which in turn significantly reduces the number of cells undergoing S-phase. A number of other phenotypic changes are observed in vitro as a consequence of Trastuzumab binding to HER2-overexpressing cells. Interaction of Trastuzumab with the human immune system via its human immunoglobulin G1 Fc domain may potentiate its antitumor activities. in vitro studies demonstrate that Trastuzumab is very effective in mediating antibody-dependent cell-mediated cytotoxicity against HER2-overexpressing tumor targets. Trastuzumab consists of two antigen-specific sites that bind to the juxtamembrane portion of the extracellular domain of the HER2 receptor and that prevent the activation of its intracellular tyrosine kinase. Trastuzumab rec

Trastuzumab treatment of mouse xenograft models results in marked suppression of tumor growth. When given in combination with standard cytotoxic chemotherapeutic agents, Trastuzumab treatment generally results in statistically superior antitumor efficacy compared with either agent given alone. Trastuzumab causes a significant growth inhibition of the outgrowth of macroscopic JIMT-1 xenograft tumors in both nude and SCID mice. has not independently confirmed the accuracy of these methods. They are for reference only.

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[2]. Hudis CA, et al. Trastuzumab--mechanism of action and use in clinical practice. N Engl J Med. 2007 Jul 5;357(1):39-51.
[3]. Barok M, et al. Trastuzumab causes antibody-de