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Antiapoptotic Effect of Highly Secreted GMCSF From Neuronal Cell-specific GMCSF Overexpressing Neural Stem Cells in Spinal Cord Injury Model

 Youngsang You  ;  Lihua Che  ;  Hye Yeong Lee  ;  Hye-Lan Lee  ;  Yeomin Yun  ;  Minhyung Lee  ;  Jinsoo Oh  ;  Yoon Ha 
 SPINE, Vol.40(24) : E1284-E1291, 2015 
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Animals ; Apoptosis/drug effects* ; Cell Line ; Granulocyte-Macrophage Colony-Stimulating Factor/genetics ; Granulocyte-Macrophage Colony-Stimulating Factor/metabolism* ; Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology ; Male ; Mice ; Mice, Inbred ICR ; Models, Biological ; Neural Stem Cells/metabolism* ; Protective Agents/metabolism* ; Protective Agents/pharmacology ; Spinal Cord Injuries/metabolism* ; Transfection
Gene and stem cell-based therapy ; Granulocytemacrophage colony-stimulating factor (GMCSF) ; Neural stem cells ; Neuronal cell-specific gene expression ; Spinal cord injury
STUDY DESIGN: Neuronal cell-specific gene expression system and neural stem cells (NSCs) were combined for treatment of spinal cord injury (SCI). OBJECTIVE: To verify the reproducibility of the neuronal cell-specific therapeutic gene overexpression system, we develop a neuronal cell-specific granulocyte-macrophage colony-stimulating factor expression system (NSE-GMCSF), and then examine the characteristics of GMCSF overexpression and protective effect on neural cells in vitro and vivo. SUMMARY OF BACKGROUND DATA: The stem cell transplantation is considered a promising therapy for SCI. However, stem cell monotherapy strategy is insufficient for complete recovery after SCI. Therefore, combined treatment method based on stem cells with other therapeutic system may be effective for improving the therapeutic efficacy. In this study, we established the gene and stem cell therapy platform based on NSCs and neuronal cell-specific gene expression system. METHODS: To examine the GMCSF expression pattern, we compared the amount of secreted GMCSF from the neuronal cell-specific GMCSF expressing NSCs with control GMCSF-expressing NSCs (respectively, NSE-GMCSF-NSCs vs. SV-GMCSF-NSCs) by ELISA in vitro and in vivo, and then verified the neuronal protective effect of these cells in vitro and vivo. RESULTS: The results showed that NSE-GMCSF-NSCs secreted more GMCSF compared with SV-GMCSF-NSCs in normoxia, hypoxia and cytotoxic conditions. The cell viability of NSE-GMCSF-NSCs was increased depending on the amount of secreted GMCSF in cytotoxic condition. In addition, the amount of secreted GMCSF by NSE-GMCSF-NSCs transplanted into injured spinal cord was significantly higher than SV-GMCSF-NSCs. Higher amount of secreted GMCSF decreased the expression of proapoptotic protein, Bax. CONCLUSION: In this study, we demonstrated that the neuronal cell-specific gene expression system induced overexpression of GMCSF in NSCs. These combined NSCs & gene therapy treatment protocol would be an effective therapeutic system for SCI. LEVEL OF EVIDENCE: N/A.
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1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Oh, Jin Soo(오진수)
Lee, Hye Yeong(이혜영)
Ha, Yoon(하윤)
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