Abstract
Based on the genetic background of cancer, we have been trying to develop novel diagnostic and therapeutic strategies against human cancers. c-myc gene activation has been detected in many human cancers, indicating a key role of c-myc in tumor development. Thus targeting c-myc gene suppression is a promising strategy for cancer treatment. Recently, an interaction between FIR (FUSE-Binding Protein-Interacting Repressor) and TFIIH/p89/XPB helicase was found to repress c-myc transcription and so might be important for suppressing tumor formation. Previously, we have shown that the expression of splicing variant of FIR is elevated in colorectal cancer tissues and promotes tumor development by disabling FIR-repression to sustain high levels of c-Myc, opposing apoptosis in cancer cells. In this study, FIR recombinant adenovirus vector induces tumor growth suppression against tumor xenografts in animal model experiment. Together, one clue to the development of cancer diagnosis and therapies directed against c-Myc may go through FIR and its splicing variant.
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