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Vitexin, an inhibitor of hypoxia-inducible factor-1α, enhances the radiotherapy sensitization of hyperbaric oxygen on glioma

  • T. Xie
  • J.-R. Wang
  • C.-G. Dai
  • X.-A. FuEmail author
  • J. DongEmail author
  • Q. Huang
Research Article
  • 27 Downloads

Abstract

Purpose

Vitexin, an inhibitor of hypoxia-inducible factor (HIF)-1α, has anti-tumor effect. However, whether it can enhance the radiotherapy sensitization of hyperbaric oxygen (HBO) on glioma is unclear. This study aimed to investigate the effect of vitexin.

Methods

The nude mice with paw-transplanted glioma were divided into four groups: control group, HBO + radiation group, HBO + vitexin group, and HBO + vitexin + radiation group. The mice of last two groups were daily given vitexin 75 mg/kg by intraperitoneal injection. 30 min after administration of vitexin, the HBO-treated mice were daily placed in HBO chamber for 60 min. The radiation-treated mice were given local tumor irradiation once every week during the HBO treatment, and the dose of irradiation was 10 Gy/time. The experimental treatment lasted for 21 days.

Results

Compared with the HBO + radiation group, the tumor volume, tumor weight, and tumor weight coefficient in the HBO + vitexin + radiation group were lower (p < 0.05). Importantly, the contents of reduced glutathione and glutathione peroxidase as well as expressions of HIF-1α, vascular endothelial growth factor, glucose transporter (GLUT)-1, and GLUT-3 proteins in tumor tissues were also lower in the HBO + vitexin + radiation group than in the HBO + radiation group (p < 0.01).

Conclusions

Vitexin can cooperate with HBO to sensitize the glioma radiotherapy, and its mechanisms may be correlated to the inhibition of HIF-1α protein expression and subsequent decrements of its downstream protein expressions, which finally cause the reduction of antioxidant capacity.

Keywords

Glioma Vitexin Hyperbaric oxygen Radiotherapy sensitization HIF-1α 

Notes

Funding

This work was supported by the Science & Technology Project for Medical Health of Suzhou New District (no. 2017Q011).

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Ethical approval

All the procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.

Informed consent

Informed consent is not required for this type of study.

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Copyright information

© Federación de Sociedades Españolas de Oncología (FESEO) 2019

Authors and Affiliations

  1. 1.Department of Neurosurgery, Suzhou Municipal HospitalThe Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhouChina
  2. 2.The Experimental Center and Department of NeurosurgeryThe Second Affiliated Hospital of Soochow UniversitySuzhouChina

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