title: ATP7B expression is associated with in vitro sensitivity to cisplatin in non-small cell lung cancer.
abstract: Copper-transporting P-type adenosine triphosphatase (ATP7B) is reportedly associated with platinum drug resistance in various solid tumors. However, the impact of ATP7B on platinum drug resistance in non-small cell lung cancer (NSCLC) remains unclear. We investigated in vitro cisplatin (CDDP) sensitivity using the collagen gel-droplet embedded culture drug sensitivity test. The ATP7B mRNA expression level in each specimen was also examined using real-time polymerase chain reaction. The relationship between ATP7B expression and in vitro CDDP sensitivity was then evaluated. The ATP7B mRNA expression levels in CDDP-resistant tumors were significantly higher than those in the CDDP-sensitive group (p=0.015; Mann-Whitney U test). Our results suggested that ATP7B expression is a promising chemoresistance marker for cisplatin.
authors.affiliation: Department of General Thoracic Surgery, Tokai University Hachioji Hospital, Tokyo 192-0032.
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Inoue
authors.forename: Hozumi
authors.initials: H
authors.lastname: Matsumoto
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Yamada
authors.forename: Kenji
authors.initials: K
authors.lastname: Kawai
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Suemizu
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Gika
authors.forename: Iwao
authors.initials: I
authors.lastname: Takanami
authors.forename: Masato
authors.initials: M
authors.lastname: Nakamura
authors.forename: Masayuki
authors.initials: M
authors.lastname: Iwazaki