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Overview
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Background
Icotinib is a potent and specific EGFR (epidermal growth factor receptor) tyrosine kinase inhibitor (IC50 = 5 nM) [1]
EGFR are family of receptor tyrosine kinase that is a transmembrane protein involved in the regulation of cell proliferation, motility and apoptosis. EGFR are expressed in various human cancer types, including breast, head & neck, NSCLC (non-small cell lung cancer) and ovarian caners. [1]
In human epidermoid carcinoma A431 cell line, Icotinib inhibited EGF-induced EGFR phosphorylation in a dose-dependent manner. Icotinib inhibited tyrosine phosphorylation of a variety of intracellular proteins. [1]
In different types of tumor xenograft mice models, Icotinib inhibited tumor growth in a dose-dependent manner without pronounced adverse effect in body weight loss and toxicity signs. In a randomized, double-blind, Gefitinib as control and multi-center phase III trial, Icotinib demonstrated efficacy on NSCLC in advanced stage. [1]
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Overview