Remedy for cancer with reduced sensitivity to molecular targeted drugs and pharmaceutical composition for enhancing sensitivity to molecular targeted drugs

摘要

Provided are a pharmaceutical composition which enhances the sensitivity of a cancer to a molecular target drug, such as gefitinib and erlotinib, wherein the cancer has resistance to the molecular target drug, and a cancer therapeutic agent effective against a cancer having resistance to a molecular target drug, such as gefitinib and erlotinib. The pharmaceutical composition comprising an HGF-MET receptor pathway inhibitor enhances the sensitivity of a cancer to a molecular target drug, such as gefitinib and erlotinib, even though the cancer has resistance to the molecular target drug. The cancer therapeutic agent comprising a molecular target drug in combination with an HGF-MET receptor pathway inhibitor is effective against a cancer having resistance to the molecular target drug.