title: Overexpression of hypoxia-inducible factor-1α and vascular endothelial growth factor in sacral giant cell tumors and the correlation with tumor microvessel density.
abstract: Although classified as benign, giant cell tumors of the bone (GCTB) may be aggressive, recur and even metastasize to the lungs. In addition, the pathogenesis and histogenesis remain unclear; thus, the driving factors behind the strong tumor growth capacity of GCTB require investigation. In the present study, the expression levels of hypoxia-inducible factor (HIF)-1α and vascular endothelial growth factor (VEGF), which are promoted by hypoxic conditions, were determined in 22 sacral GCTB samples using immunohistochemistry and western blot analysis. Furthermore, CD34 expression was analyzed using these methods. The correlation between HIF-1α or VEGF expression and the tumor microvessel density (MVD) was then determined. The results demonstrated that HIF-1α, VEGF and CD34 were overexpressed in the 22 sacral GCTB specimens, and overexpression of HIF-1α and VEGF correlated with the tumor MVD. Thus, the present study has provided novel indicators for the tumor growth capacity of GCTBs.
authors.affiliation: Graduate School of Chongqing Medical University, Chongqing 400331, P.R. China.
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Fu
authors.affiliation: Department of Pediatric Orthopedics, Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolian Autonomous Region 010050, P.R. China.
authors.forename: Rui
authors.initials: R
authors.lastname: Bai
authors.affiliation: Department of Pediatric Orthopedics, Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolian Autonomous Region 010050, P.R. China.
authors.forename: Zhenqun
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Orthopedics, Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolian Autonomous Region 010050, P.R. China.
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Orthopedics, Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolian Autonomous Region 010050, P.R. China.
authors.forename: Gang
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Department of Orthopedics, Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolian Autonomous Region 010050, P.R. China.
authors.forename: Yuxin
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolian Autonomous Region 010050, P.R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China.
authors.forename: Dianming
authors.initials: D
authors.lastname: Jiang
authors.affiliation: Department of Orthopedics, Fourth Hospital of Inner Mongolia Autonomous Region, Huhhot, Inner Mongolian Autonomous Region 010030, P.R. China.
authors.forename: Dezhi
authors.initials: D
authors.lastname: Zhu
keywords: hypoxia inducible factor-1α; microvessel density; sacral giant cell tumors; vascular endothelial growth factor