Guo Xue-Yan, Duan Fei-Xiang, Chen Jing, Wang Ying, Wang Rui, Shen Lin, Qi Qi, Jiang Zhi-Quan, Zhu An-You, Xi Jin, Lü He-Zuo, Hu Jian-Guo
Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, Bengbu, China.
Anhui Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu, China.
Front Neurosci. 2019 Jan 22;13:6. doi: 10.3389/fnins.2019.00006. eCollection 2019.
Previous studies by our group have demonstrated that the transplantation of exogenous platelet-derived growth factor (PDGF)-AA-overexpressing oligodendrocyte progenitor cells (OPCs) promotes tissue repair and recovery of neurological function in a rat model of spinal cord injury (SCI). However, it remains unclear whether treatment with PDGF-AA also affects endogenous oligodendrocytes (OLs) or even neurons, thus promoting further functional recovery after SCI. In the present study, we evaluated the therapeutic potential of PDGF-AA treatment by direct subcutaneous injection of PDGF-AA immediately after SCI. We demonstrated that PDGF-AA injection resulted in increased tissue sparing, myelination and functional recovery in rats following SCI. Further experimentation confirmed that PDGF-AA increased the survival of endogenous OPCs and OLs, and promoted the proliferation of OPCs and their differentiation into OLs. Moreover, PDGF-AA also protected motor neurons from death in the injured spinal cord. These results indicated that PDGF-AA administration may be an effective treatment for SCI.
我们团队之前的研究表明,在脊髓损伤(SCI)大鼠模型中,移植外源性过表达血小板衍生生长因子(PDGF)-AA的少突胶质细胞祖细胞(OPC)可促进组织修复和神经功能恢复。然而,尚不清楚PDGF-AA治疗是否也会影响内源性少突胶质细胞(OL)甚至神经元,从而促进SCI后的进一步功能恢复。在本研究中,我们通过在SCI后立即直接皮下注射PDGF-AA来评估其治疗潜力。我们证明,PDGF-AA注射可增加SCI大鼠的组织保留、髓鞘形成和功能恢复。进一步的实验证实,PDGF-AA可提高内源性OPC和OL的存活率,并促进OPC的增殖及其向OL的分化。此外,PDGF-AA还可保护运动神经元免于在受损脊髓中死亡。这些结果表明,给予PDGF-AA可能是治疗SCI的有效方法。