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Trastuzumab

曲妥珠單抗

Mechanism of action:

Trastuzumab 是一種抗 HER2 單株抗體(anti-HER2 monoclonal antibody)。人類表皮生長因子受體 2(HER2,human epidermal growth factor receptor 2)屬於 ErbB 受體家族,其活化依賴與其他家族成員(HER1/EGFR、HER3、HER4)的二聚化。Trastuzumab 結合 HER2 受體後,可抑制 HER2 過度活化所引發的下游致癌訊號傳導,包括 PI3K/AKT、MAPK/ERK,使腫瘤細胞的增殖能力下降,並更容易進入凋亡。因為 trastuzumab 為 IgG1 抗體,可透過 Fc 區域引起抗體依賴性細胞媒介細胞毒性作用(antibody-dependent cell-mediated cytotoxicity)。

​Reference(s):

1. Bange J et al. (2001). Molecular targets for breast cancer therapy and prevention. Nat Med. 


2. Menard S et al. (2003). Biologic and therapeutic role of HER2 in cancer. Oncogene. 


3. Kute T et al. (2004). Development of Herceptin resistance in breast cancer cells. Cytometry A.

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