AP-1 and colorectal cancer

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Abstract
Activator protein-1 (AP-1) is a transcription factor that consists of either a Jun-Jun homodimer or a Jun-Fos heterodimer. AP-1 regulates the expression of multiple genes essential for cell proliferation, differentiation and apoptosis. Numerous reports suggest that AP-1 plays an important role in various human diseases. Among them, the roles relating to human cancers have been strongly suggested for a long time. In human cancers, colorectal cancer is still a leading cause of morbidity and mortality in the world. Since there are some reports about the role of AP-1 in colorectal cancer response to a number of stimuli, such as cytokines and growth factors, and oncogenic transformation, therapeutic inhibition of AP-1 activity has attracted considerable interest. Here, we demonstrate the biological properties of AP-1 and its role in colorectal cancer, and discuss a possibility of an AP-1 inhibitor, an adenovirus dominant-negative mutant of c-Jun, as a therapeutic a gent for gene therapy.