title: Clinicopathological significance of L-type amino acid transporter 1 (LAT1) expression in patients with adenoid cystic carcinoma.
abstract: The expression of L-type amino acid transporter 1 (LAT1) is correlated with tumor cell growth and survival. However, the clinicopathological significance of LAT1 expression in adenoid cystic carcinoma (ACC) remains to be elucidated. The aim of this study is to investigate the clinicopathological significance of LAT1 expression in ACC. A total of 30 patients with ACC were retrospectively reviewed. Tumor sections were stained by immunohistochemistry for LAT1, p53, and CD98, and cell proliferation and microvessel density (MVD) were determined by Ki-67 and CD34, respectively. High LAT1 and CD98 expression were observed in 27 % (8/30) and 23 % (7/30) of samples, respectively (p > 0.999). The high expression of LAT1 was significantly correlated with cell proliferation (Ki-67) and the cell cycle regulator p53. By univariate analysis, solid histological pattern, maxillary tumor site, LAT1, CD98, Ki-67 and p53 were significantly associated with poor prognosis. Multivariate analysis demonstrated that the high expression of LAT1 was an independent prognostic factor for predicting poor prognosis after surgical resection. LAT1 is a promising clinical marker to predict the outcome after surgery in patients with ACC.
authors.affiliation: Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Gunma University, Showa-machi, Maebashi, Gunma, 371-8511, Japan, kkaira1970@yahoo.co.jp.
authors.forename: Kyoichi
authors.initials: K
authors.lastname: Kaira
authors.forename: Minoru
authors.initials: M
authors.lastname: Toyoda
authors.forename: Masato
authors.initials: M
authors.lastname: Shino
authors.forename: Koichi
authors.initials: K
authors.lastname: Sakakura
authors.forename: Katsumasa
authors.initials: K
authors.lastname: Takahashi
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Tominaga
authors.forename: Noboru
authors.initials: N
authors.lastname: Oriuchi
authors.forename: Yoshikatsu
authors.initials: Y
authors.lastname: Kanai
authors.forename: Tetsunari
authors.initials: T
authors.lastname: Oyama
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Chikamatsu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D003528:Carcinoma, Adenoid Cystic / Q000378:metabolism* / Q000473:pathology; D005260:Female; D027261:Fusion Regulatory Protein-1 / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D027283:Large Neutral Amino Acid-Transporter 1 / Q000096:biosynthesis*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012468:Salivary Gland Neoplasms / Q000378:metabolism* / Q000473:pathology; D018709:Statistics, Nonparametric
chemical_list: D027261:Fusion Regulatory Protein-1; D027283:Large Neutral Amino Acid-Transporter 1