shRNA against PTEN promotes neurite outgrowth of cortical neurons and functional recovery in spinal cord contusion rats

Author:

Zhou Hengxing1,Li Xueying2,Wu Qiang3,Li Fuyuan1,Fu Zheng2,Liu Chang4,Liang Zhipin4,Chu Tianci1,Wang Tianyi1,Lu Lu1,Ning Guangzhi1,Kong Xiaohong4,Feng Shiqing1

Affiliation:

1. Department of Orthopaedics, Tianjin Medical University General Hospital, No. 154 Anshan Road, Heping District, Tianjin 300052, PR China

2. Key Laboratory of Immuno Microenvironment & Disease of the Educational Ministry of China, Department of Immunology, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin 300070, PR China

3. Department of Orthopaedics, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, No. 314 Anshanxi Road, Nankai District, Tianjin 300193, PR China

4. School of Medicine, Nankai University, No. 94 Weijin Road, Nankai District, Tianjin 300071, PR China

Abstract

Aim: To explore neurite growth/regeneration and spinal cord injury repair after PTEN silencing via lentivirus-mediated RNAi. Materials & methods: Cortical neurons were seeded on or adjacent to chondroitin sulfate proteoglycans. The length, number and crossing behavior of neurites were calculated. Lentivirus was locally injected into spinal cord contusion rats. The functional recovery and immunohistochemical staining were analyzed. Results: Neurites with PTEN silencing exhibited significant enhancements in elongation, initiation and crossing ability when they encountered chondroitin sulfate proteoglycans in vitro. In vivo PTEN silencing improved functional recovery significantly, and promoted axon and synapse formation, but not scar formation. Conclusions: PTEN silencing may be promising for spinal cord injury repair.

Publisher

Future Medicine Ltd

Subject

Embryology,Biomedical Engineering

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