Expression of coxsackie and adenovirus receptor reduces the lung metastatic potential of murine tumor cells.
The coxsackie and adenovirus receptor (CAR) is involved in the epithelial cell tight junction, the downregulated expression of which is observed in different cancer types. In the present study, we examined CAR's role in tumor metastasis using a B16 melanoma and CT26 colon adenocarcinoma model of experimental metastasis. In lung metastasis, the colony number of B16 cells stably expressing CAR (B16CAR) was significantly lower than that of the control CAR-negative B16 cells. B16 and CT26 cells transiently expressing CAR, which were transduced with adenovirus (Ad) vector expressing CAR, also reduced lung metastasis, suggesting that CAR plays a role in the early stage of metastasis. CAR expression significantly decreased the accumulation of B16 cells in the lung after i.v. injection and the migration in vitro. CAR expression reduced expression of alpha(v), alpha(4), beta(3) and beta(1) integrin, which play important roles in attachment to cells or basement membrane. Thus, CAR expression likely acts as a metastatic suppressor.
Yamashita
Manabu
M
National Institute of Biomedical Innovation, Ibaraki, Osaka 567-0085, Japan.
Ino
Asami
A
Kawabata
Kenji
K
Sakurai
Fuminori
F
Mizuguchi
Hiroyuki
H
D000230:Adenocarcinoma / Q000378:metabolism / Q000556:secondary*; D000256:Adenoviridae; D000818:Animals; D015153:Blotting, Western; D003110:Colonic Neoplasms / Q000378:metabolism / Q000556:secondary*; D062727:Coxsackie and Adenovirus Receptor-Like Membrane Protein; D004770:Enterovirus; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D015967:Gene Expression Regulation, Viral; D005856:Germ-Free Life; D007275:Injections, Intravenous; D016023:Integrins / Q000378:metabolism; D008175:Lung Neoplasms / Q000378:metabolism / Q000556:secondary*; D008297:Male; D008546:Melanoma, Experimental / Q000378:metabolism / Q000556:secondary*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011991:Receptors, Virus / Q000008:administration & dosage / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction
C568772:CLMP protein, mouse; D062727:Coxsackie and Adenovirus Receptor-Like Membrane Protein; D016023:Integrins; D011991:Receptors, Virus