Influence of vascular endothelial growth factor and radiation on gap junctional intercellular communication in glioblastoma multiforme cell lines
Reinhardt Krcek
Pauline Latzer
Iren(a)us Anton Adamietz
Helmut Bühler
Carsten Theiss
摘要：Glioblastoma multiforme (GBM) is a highly aggressive glial brain tumor with an unfavorable prognosis despite all current therapies including surgery,radiation and chemotherapy.One characteristic of this tumor is a strong synthesis of vascular endothelial growth factor (VEGF),an angiogenesis factor,followed by pronounced vascularization.VEGF became a target in the treatment of GBM,for example with bevacizumab or the tyrosine kinase inhibitor axitinib,which blocks VEGF receptors.To improve patients' prognosis,new targets in the treatment of GBM are under investigations.The role of gap junctions in GBM remains unknown,but some experimental therapies affect these intercellular channels to treat the tumor.Gap junctions are composed of connexins to allow the transport of small molecules between adjacent cells through gap junctional intercellular communication (GJIC).Based on data derived from astrocytes in former studies,which show that VEGF is able to enhance GJIC,the current study analyzed the effects of VEGF,radiation therapy and VEGF receptor blockade by axitinib on GJIC in human GBM cell lines U-87 and U-251.While VEGF is able to induce GJIC in U-251 cells but not in U-87 cells,radiation enhances GJIC in both cell lines.VEGF re(c)(e)ptor blockade by axitinib diminishes radiation induced effects in U-251 partially,while increases GJIC in U-87 cells.Our data indicate that VEGF and radiation are both modifying components of GJIC in pathologic brain tumor tissue.
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论文发表日期：2017-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：7( 1816-1822 )
英文信息