The absence of human equilibrative nucleoside transporter 1 expression predicts nonresponse to gemcitabine-containing chemotherapy in non-small cell lung cancer.
We report here the development of a polyclonal antibody for human equilibrative nucleoside transporter 1 (hENT1) and assess the expression of hENT1 in non-small cell lung cancer (NSCLC) patients who were treated with gemcitabine-containing chemotherapy. hENT1 expression was analyzed by immunohistochemical staining in 24 NSCLC biopsy samples of formalin-fixed, paraffin-embedded tissues. The hENT1-positive staining in NSCLC samples was significantly associated with response to gemcitabine-containing chemotherapy. Responses to gemcitabine-containing chemotherapy were evident in none of the seven patients with no hENT1 expression. These results indicate that the absence of hENT1 expression may be useful to predict NSCLC patients who will not respond to gemcitabine-containing chemotherapy.
Department of Medical Oncology and Immunology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan. t-oguri@med.nagoya-cu.ac.jp
Tetsuya
T
Oguri
Hiroyuki
H
Achiwa
Hideki
H
Muramatsu
Hiroaki
H
Ozasa
Shigeki
S
Sato
Shigeki
S
Shimizu
Hideko
H
Yamazaki
Tadaaki
T
Eimoto
Ryuzo
R
Ueda
D000230:Adenocarcinoma / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D000368:Aged; D000369:Aged, 80 and over; D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology*; D018287:Carcinoma, Large Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D002289:Carcinoma, Non-Small-Cell Lung / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D003841:Deoxycytidine / Q000031:analogs & derivatives* / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm; D033721:Equilibrative Nucleoside Transporter 1 / Q000235:genetics / Q000378:metabolism*; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008175:Lung Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D000093542:Gemcitabine
D000964:Antimetabolites, Antineoplastic; D033721:Equilibrative Nucleoside Transporter 1; D012333:RNA, Messenger; C438649:SLC29A1 protein, human; D003841:Deoxycytidine; D000093542:Gemcitabine