L-type amino-acid transporter 1 expression predicts the response to preoperative hyperthermo-chemoradiotherapy for advanced rectal cancer

Autor: Takeshi, Ebara, Kyoichi, Kaira, Jun-Ichi, Saito, Mariko, Shioya, Takayuki, Asao, Takeo, Takahashi, Hideyuki, Sakurai, Yoshikatsu, Kanai, Hiroyuki, Kuwano, Takashi, Nakano
Rok vydání: 2010
Předmět:
Zdroj: Anticancer research. 30(10)
ISSN: 1791-7530
Popis: To evaluate whether expression of L-type amino acid transporter 1 (LAT1) in pretreatment rectal cancer biopsies is predictive of tumour response to neoadjuvant hyperthermo-chemoradiotherapy (HCRT).Forty-four patients with rectal adenocarcinoma who received neoadjuvant HCRT were investigated. LAT1 expression was immunohistochemically evaluated using pretreatment biopsies. The operation was performed after 2-3 months following HCRT and each resected specimen was graded by the histological criteria of the Japanese Classification of Colorectal Carcinoma.A positive LAT1 expression was recognized in 50.0% (22/44) of patients. Resected specimens were divided into 2 groups according to the histological grading criteria: good response (n=29) and poor response (n=15). LAT1-negative tumours had an 81.8% probability of good response and 18.2% probability of poor response. LAT1 expression showed marginally significant association with response to HCRT (p=0.05).LAT1 may be a useful predictive marker of response to HCRT in rectal cancer.
Databáze: OpenAIRE