title: GSTP1 affects chemoresistance against camptothecin in human lung adenocarcinoma cells.
abstract: Glutathione S-transferase P1 (GSTP1) is known as a xenobiotic enzyme through conjugation of glutathione and also as an inhibitor of Jun N-terminal kinase (JNK). We intended to investigate whether GSTP1 affects chemoresistance against camptothecin in human lung adenocarcinoma cells. Camptothecin induced GSTP1 expression. Downregulation of GSTP1 increased necrosis induced by camptothecin in A549 cells but not in PC-14 and RERF-LC-KJ cells. This phenomenon in A549 cells was hardly changed by JNK inhibitor SP600125 but was almost diminished by l-buthionine-sulfoximine. These results suggest that GSTP1 has protective effects against camptothecin-induced necrosis in subset of human lung adenocarcinoma through glutathione conjugation.
authors.affiliation: Department of Pulmonary Medicine, Yokohama City University Medical Center, 4-57, Urahune-cho, Minami-ku, Yokohama City 232-0024, Japan.
authors.forename: Takeo
authors.initials: T
authors.lastname: Ishii
authors.forename: Shinji
authors.initials: S
authors.lastname: Teramoto
authors.forename: Takeshi
authors.initials: T
authors.lastname: Matsuse
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D002166:Camptothecin / Q000494:pharmacology*; D002289:Carcinoma, Non-Small-Cell Lung / Q000473:pathology*; D015536:Down-Regulation; D019008:Drug Resistance, Neoplasm; D005982:Glutathione Transferase / Q000494:pharmacology*; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D009336:Necrosis
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D005982:Glutathione Transferase; D002166:Camptothecin