title: Erlotinib prevents pulmonary metastasis in curatively resected breast carcinoma using a mouse model.
abstract: Metastatic breast cancer is still defined as an incurable disease, with the lungs being the most common metastatic sites in breast cancer patients. Epidermal growth factor receptor (EGFR), a member of receptor tyrosine kinase family, is known to be involved in survival, migration, angiogenesis and metastasis of cancer. The spontaneous pulmonary metastasis mouse model was applied to evaluate the effects of the EGFR tyrosine kinase inhibitor, erlotinib, on the prevention of pulmonary metastasis in curatively resected breast carcinoma. The expression of EGF and EGFR was significantly strong in pulmonary metastatic nodules compared to those in primary breast carcinoma tissue. A treatment of erlotinib (oral gavage, 50 mg/kg/day, every day for 6 weeks) given to mastectomized mice inhibited the incidence of pulmonary metastasis. The number of metastatic pulmonary nodules was significantly reduced in the erlotinib-treated group compared with the control. Therefore, erlotinib may play a role in preventing pulmonary metastasis, which shows the strong expression of EGF and EGFR after curative resection of primary breast cancer.
authors.affiliation: Department of Surgery, Samsung Medical Center and Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Choi
authors.forename: Seok-Jin
authors.initials: SJ
authors.lastname: Nam
authors.forename: Myung Jin
authors.initials: MJ
authors.lastname: Son
authors.forename: Dae-Kyeum
authors.initials: DK
authors.lastname: Kim
authors.forename: Jeong-Han
authors.initials: JH
authors.lastname: Kim
authors.forename: Jung-Hyun
authors.initials: JH
authors.lastname: Yang
authors.forename: Mi-Hyun
authors.initials: MH
authors.lastname: Kim
authors.forename: Hyun Seok
authors.initials: HS
authors.lastname: Song
authors.forename: Do-Hyun
authors.initials: DH
authors.lastname: Nam
authors.forename: Sa Ik
authors.initials: SI
authors.lastname: Bang
mesh_terms: D000818:Animals; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000473:pathology*; D045744:Cell Line, Tumor; D004195:Disease Models, Animal; D066246:ErbB Receptors / Q000378:metabolism; D000069347:Erlotinib Hydrochloride; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000517:prevention & control / Q000556:secondary*; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009362:Neoplasm Metastasis / Q000517:prevention & control; D009368:Neoplasm Transplantation; D047428:Protein Kinase Inhibitors / Q000494:pharmacology*; D011799:Quinazolines / Q000494:pharmacology*
chemical_list: D047428:Protein Kinase Inhibitors; D011799:Quinazolines; D000069347:Erlotinib Hydrochloride; D066246:ErbB Receptors