Although the function of hypoxia-inducible factor 1 (HIF1) in many kinds of solid tumor has been revealed, the significance of HIF1 in osteosarcoma is still controversial and not well understood.
Our results revealed that Nox4 was predominantly highly expressed in the endogenous cycling hypoxic areas with HIF-1 activation and blood perfusion within the solid tumor microenvironment.
All of these results indicate that Akt/mTOR-dependent translation of HIF-1alpha plays a critical role in the postirradiation up-regulation of intratumoral HIF-1 activity in response to radiation-induced alterations of glucose and oxygen availability in a solid tumor.
Hypoxia-inducible factor 1 (HIF-1) controls angiogenesis and glycolysis, two leading characteristics of solid tumor invasion, metastasis, and lethality.