Abstract
Following development of basic science and the advancement of tumor molecular biology, molecular-target therapy has evolved as a new field for cancer treatment. The agents used act at specific target points such as receptors, kinases and signal transduction systems which are related to tumor growth. These actions result in inhibting proliferation, metastasis, vascularization, and promoting tumor apoptosis. Iressa (gefitinib) which is used for the treatment of NSCLC is a small molecular weight agent acting by inhibition of epidermal growth factor receptor-tyrosine kinase. Iressa was the first approved agent for target therapy for the treatment of NSCLC. This article focuses on the results from clinical trials and the potential of Iressa for the treatment of NSCLC.
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