HIF1A and glioma: On the other hand, cooperation of vitexin (75 mg/kg, i.p., 21 days) with hyperbaric oxygen (HBO) therapy in glioma mouse model could sensitize the glioma radiotherapy by reducing glutathione peroxidase activity and glutathione content as well as expressions of HIF‐1α and VEGF in tumor tissues in SU3‐inoculated nude mice (Xie et al., 2019).