Abstract:Yin Yang-1 (YY1) is a zinc finger protein and a member of the GLI-Krüppel family which can act as a transcriptional repressor, an activator or promoter binding protein to direct and initiate transcription of many cell and viral genes. It has recently been widely used in tumor biological models, because its expression and function are closely related to the cell cycle progress. Some evidence shows that, in addition to playing a regulatory role in normal biological processes, the expression and/or activation of YY1 is also associated with tumorigenesis. This paper mainly reviews the research progress of YY1 in transcriptional regulation, embryonic development and its application in head and neck cancer.