Abstract
Colorectal cancer (CRC) poses one of the most serious threats to human health worldwide, and abnormally expressed c-Myc and p53 are deemed the pivotal driving forces of CRC progression. In this study, we discovered that the lncRNA FIT, which was downregulated in CRC clinical samples, was transcriptionally suppressed by c-Myc in vitro and promoted CRC cell apoptosis by inducing FAS expression. FAS is a p53 target gene, and we found that FIT formed a trimer with RBBP7 and p53 that facilitated p53 acetylation and p53-mediated FAS gene transcription. Moreover, FIT was capable of retarding CRC growth in a mouse xenograft model, and FIT expression was positively correlated with FAS expression in clinical samples. Thus, our study elucidates the role of the lncRNA FIT in human colorectal cancer growth and provides a potential target for anti-CRC drugs.
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