标题：Endothelial cells modified by adenovirus vector containing nine copies hypoxia response elements and human vascular endothelial growth factor as the novel seed cells for bone tissue engineering
作者：Song Xiaobin;Shi Liang;Chen Lamei;Liu Xinyu;Qu Xun;Wang Ketao;Wei Fengcai
作者机构：[Song Xiaobin] Department of Oral and Maxillofacial Surgery, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China.;[Shi Liang] Departme 更多
通讯作者地址：[Wang, KT; Wei, FC]Shandong Univ, Qilu Hosp, Dept Oral & Maxillofacial Surg, Jinan 250012, Shandong, Peoples R China.
关键词：vascular endothelial growth factor; hypoxic response element; bone; tissue engineering; hypoxia
摘要：Vascularization is one of the hotspots during the development of new therapeutic strategies for bone tissue engineering, which can alleviate hypoxic circumstance and prevent transplant failure. Vascular endothelial growth factor (VEGF) gene transfection using recombinant adenovirus (Ad) vector can effectively promote angiogenesis, but uncontrolled long-term continuous expression of VEGF brings safety concern. Here we constructed a recombinant Ad vector containing nine copies of HRE promoter and the hVEGF165 gene, which conserved the oxygen sensitivity of hypoxia-inducible factor-1/hypoxia response elements (HIF-1/HRE). After transfection into human umbilical vein endothelial cells (HUVEC), the hVEGF165 mRNA and protein levels were much higher in response to hypoxia, as revealed by RT-PCR and ELISA, respectively. Furthermore, Ad-9HRE-hVEGF165 vector effectively promoted proliferation, migration and tube formation of HUVEC under hypoxic conditions. Thus we believe that the Ad-9HRE-hVEGF165 vector can contribute to the regulation of vascularization, which may provide a new approach for a better control of the expression of hVEGF165 during bone tissue engineering.