Hypoxia-inducible factor-1 (HIF-1), identified as one of the transcription factors, has been found to play an essential role in oxygen homeostasis. HIF-1 is a heterodimer composed of HIF-1 subunit and one of three subunits(Hif-1, Hif-2( or Hif-3)). The activation of Hif-1 is closely associated with a variety of tumors and oncogenic pathways. Hif-1( consists of DNA binding domain(DBD domain), Dimerization domain and C-terminla regulatiory domains, including two transactivation domains(TAD), an oxygen-dependent degradation(ODD) domain, and inhibitory domains.