title: Effects of hypoxia on expression of P-gp and mutltidrug resistance protein in human lung adenocarcinoma A549 cell line.
abstract: To study the effects of hypoxia-on the expression of P-gp and mutltidrug resistance protein in human lung adenocarcinoma A549 cell line, and to explore the probable mechanism of hypoxia in tumor cell of MDR. The expression of hypoxia inducible factor-1 alpha, P-gp and mutltidrug resistance protein was immunohistochemically detected by culturing human lung adenocarcinoma A549 cell under hypoxia (2 % O2) for 24 h. After interaction with adriamycin or cisplatin under hypoxia (2 % O2) for 24 h, the cell survival rate was detected by MTT. Our results showed that the expression of hypoxia inducible factor-1 alpha, P-gp and mutltidrug resistance protein under hypoxia were higher than the expression under normoxia, and correlations between the expression of HIF-1alpha and P-gp or multidrug resistance-associated protein was observed (P< 0.05). The resistance of adriamycin of A549 cell was enhanced under hypoxia. It is concluded that the resistance of tumor chemotherapy is enhanced in hypoxia. The expression of HIF-1alpha is obviously correlated with the expression of P-gp and mutltidrug resistance protein.
authors.affiliation: Cancer Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wauhan 430030, China.
authors.forename: Shu
authors.initials: S
authors.lastname: Xia
authors.forename: Shiying
authors.initials: S
authors.lastname: Yu
authors.forename: Xianglin
authors.initials: X
authors.lastname: Yuan
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis* / Q000235:genetics; D000230:Adenocarcinoma / Q000378:metabolism / Q000473:pathology; D015687:Cell Hypoxia; D045744:Cell Line, Tumor; D002945:Cisplatin / Q000494:pharmacology; D004317:Doxorubicin / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm; D006801:Humans; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000096:biosynthesis* / Q000235:genetics; D008175:Lung Neoplasms / Q000378:metabolism* / Q000473:pathology; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D002945:Cisplatin; D004317:Doxorubicin; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D027425:ATP-Binding Cassette, Sub-Family C Proteins