Abstract
Acquisition of anoikis-resistance is a pre-requisite for cancer cell metastasis. We have demonstrated that hepatoma cells could resist anoikis by a synoikis-like survival style. In this study, we further suggest that acquisition of anoikis-resistance confer cancer cells more capacity for invasiveness, evading from cancer therapeutic agents and escaping from host immune attacks. We investigated the response of anoikis-resistant hepatoma cells to TNF-related apoptosis-inducing ligand (TRAIL), a typical immune surveillant molecule as well as a potential anticancer agent. Our data indicated that detached hepatoma cells not only resist TRAIL-induced apoptosis, but also domesticate TRAIL to exert a stealth “tumor counterattack” effect. These results reveal that acquisition of anoikis-resistance may act as a selective pressure to superimpose on hepatoma cells more metastatic potential for the development of cancer.
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