Gefitinib hydrochloride (ZD1839 hydrochloride) 是一种有效，选择性和口服活性的 EGFR 酪氨酸激酶抑制剂，IC50 为 33 nM。Gefitinib hydrochloride 选择性抑制 EGF 刺激的肿瘤细胞生长 (IC50 为 54 nM)，并阻断 EGF 刺激的肿瘤细胞中 EGFR 自磷酸化。Gefitinib hydrochloride 还可诱导细胞自噬 (autophagy)，并具有抗肿瘤活性。 Product Introduction Gefitinib hydrochloride (ZD1839 hydrochloride) is a potent, selective and orally active EGFR tyrosine kinase inhibitor with an IC50 of 33 nM. Gefitinib hydrochloride selectively inhibits EGF-stimulated tumor cell growth (IC50 of 54 nM) and that blocks EGF-stimulated EGFR autophosphorylation in tumor cells. Gefitinib hydrochloride also induces autophagy. Gefitinib hydrochloride has antitumour activity.