RT Journal Article SR Electronic T1 Inhibition of L-type Amino Acid Transporter 1 Has Antitumor Activity in Non-small Cell Lung Cancer JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 4819 OP 4828 VO 30 IS 12 A1 HISAO IMAI A1 KYOICHI KAIRA A1 NOBORU ORIUCHI A1 KIMIHIRO SHIMIZU A1 HIDEYUKI TOMINAGA A1 NORIKO YANAGITANI A1 NORIAKI SUNAGA A1 TAMOTSU ISHIZUKA A1 SHUSHI NAGAMORI A1 KANYARAT PROMCHAN A1 TAKASHI NAKAJIMA A1 NOBUYUKI YAMAMOTO A1 MASATOMO MORI A1 YOSHIKATSU KANAI YR 2010 UL http://ar.iiarjournals.org/content/30/12/4819.abstract AB Background: L-type amino acid transporter 1 (LAT1) is highly expressed in various human neoplasms. Antitumor activity of inhibiting LAT1 was analyzed in non-small cell lung cancer (NSCLC). Materials and Methods: Expression of LAT1 mRNA in 54 lung cancer cell lines was examined by RT-PCR. An inhibitor of LAT1, 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH), was administered to H1395 cell. LAT1 expression was examined in correlation with clinical features and outcome in 51 NSCLC patients. Results: Inhibition of LAT1 by BCH reduced cell viability in H1395 cells. Furthermore, co-administration of gefitinib with BCH reduced the viability of the cells more than either agent alone. Inhibition of LAT1 reduced the level of phosphorylation of mTOR, p70S6K and 4EBP1. LAT1 protein expression was closely associated with wild type EGFR, and was an independent significant factor to predict a poor prognosis. Conclusion: Inhibition of LAT1 may be a new rationale to the effective therapy of NSCLC without EGFR mutation.