Local expressions of hypoxia-inducible factor-1α and vascular endothelial growth factor after photodynamic therapy in rats with glioma
10.3760/cma.j.issn.1008-6315.2013.03.010
- VernacularTitle:光动力学疗法治疗脑胶质瘤亚急性期大鼠缺氧诱导因子1α和血管内皮细胞生长因子的表达
- Author:
Xuepeng ZHANG
;
Ming LI
;
Ying ZHAO
;
Yuanyuan ZHANG
;
Hua DING
;
Lijun WU
- Publication Type:Journal Article
- Keywords:
Glioma;
Photodynamic therapy;
Hypoxia-inducible factor-1α;
Vascular endothelial;
growth factor
- From:
Clinical Medicine of China
2013;(3):258-262
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe local expressions of hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) in Fischer 344 rats with glioma in the sub-acute phase after photodynamic therapy (PDT).Methods Thirty-two fischer 344 rats were implanted 9L cells into brain and randomly subjected to no treatment and PDT treatment (40 J/cm2,80 J/cm2,120 J/cm2).All animals received PDT treatment mediated with 5-Aminolevulinic acid (ALA) on the seventh day after implantation,respectively,and were then sacrificed at 7 days after PDT treatment.The tumor volume was measured by H&E staining,and the expressions of VEGF and HIF-1α in either glioma tissue or Brain adjacent to tumor(BAT) were detected by Western blot.Results The tumor volumes of control and 40,80,and 120 J/cm2 groups were (103.27 ± 8.83),(73.93 ± 7.55),(57.89 ± 7.53),and (48.57 ± 6.86) mm3,respectively.Tumor volumes decreased significantly after ALA-PDT treatment(F =216.183,P =0.000),and the decrease in tumor volume was PDT optical dose dependent(P < 0.001).Both VEGF and HIF-1 α expressions in glioma tissue were very high and no significant difference was found (VEGF:F =1.867,P =0.155 ; HIF-1 α:F =2.106,P =0.119) in all groups in the sub-acute phase after PDT,which were detected by Western blot.However,there were little VEGF and HIF-1α expressions in BAT and the expressions gradually increased with the increased dose of PDT(VEGF:F =37.065,P =0.000 ; HIF-1 α:F =39.775,P =0.000),among which PDT with 120 J/cm2 had the most obvious effect.Conclusion ALA-PDT effectively reduces glioma;however,it induces local expressions of HIF-1α and VEGF in BAT.