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Zhao H, Yang BL, Liu ZX, Yu Q, Zhang WJ, Yuan K, Zeng HH, Zhu GC, Liu DM, Li Q. Microencapsulation improves inhibitory effects of transplanted olfactory ensheathing cells on pain after sciatic nerve injury. Neural Regen Res 2015; 10:1332-7. [PMID: 26487865 PMCID: PMC4590250 DOI: 10.4103/1673-5374.162769] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Olfactory bulb tissue transplantation inhibits P2X2/3 receptor-mediated neuropathic pain. However, the olfactory bulb has a complex cellular composition, and the mechanism underlying the action of purified transplanted olfactory ensheathing cells (OECs) remains unclear. In the present study, we microencapsulated OECs in alginic acid, and transplanted free and microencapsulated OECs into the region surrounding the injured sciatic nerve in rat models of chronic constriction injury. We assessed mechanical nociception in the rat models 7 and 14 days after surgery by measuring paw withdrawal threshold, and examined P2X2/3 receptor expression in L4–5 dorsal root ganglia using immunohistochemistry. Rats that received free and microencapsulated OEC transplants showed greater withdrawal thresholds than untreated model rats, and weaker P2X2/3 receptor immunoreactivity in dorsal root ganglia. At 14 days, paw withdrawal threshold was much higher in the microencapsulated OEC-treated animals. Our results confirm that microencapsulated OEC transplantation suppresses P2X2/3 receptor expression in L4–5 dorsal root ganglia in rat models of neuropathic pain and reduces allodynia, and also suggest that transplantation of microencapsulated OECs is more effective than transplantation of free OECs for the treatment of neuropathic pain.
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Affiliation(s)
- Hao Zhao
- Department of Anatomy, Basic Medical School, Nanchang University, Nanchang, Jiangxi Province, China ; Medical Department, Graduate School, Nanchang University, Nanchang, Jiangxi Province, China
| | - Bao-Lin Yang
- Department of Anatomy, Basic Medical School, Nanchang University, Nanchang, Jiangxi Province, China
| | - Zeng-Xu Liu
- Department of Anatomy, Basic Medical School, Nanchang University, Nanchang, Jiangxi Province, China
| | - Qing Yu
- Library, Nanchang University, Nanchang, Jiangxi Province, China
| | - Wen-Jun Zhang
- Medical Department, Graduate School, Nanchang University, Nanchang, Jiangxi Province, China
| | - Keng Yuan
- Medical Office, Nanchang University, Nanchang, Jiangxi Province, China
| | - Hui-Hong Zeng
- Department of Histology and Embryology, Basic Medical School, Nanchang University, Nanchang, Jiangxi Province, China
| | - Gao-Chun Zhu
- Department of Anatomy, Basic Medical School, Nanchang University, Nanchang, Jiangxi Province, China
| | - De-Ming Liu
- Department of Anatomy, Basic Medical School, Nanchang University, Nanchang, Jiangxi Province, China
| | - Qing Li
- Medical Department, Graduate School, Nanchang University, Nanchang, Jiangxi Province, China
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Li S, Zhang Y, Chen L, Li N, Xie H, Guo X, Zhao S, Yu W, Lv Y, Lv G, Wu H, Ma X. The relationship between the inflammatory response and cell adhesion on alginate-chitosan-alginate microcapsules after transplantation. J Biomed Mater Res A 2014; 103:2333-43. [PMID: 25394561 DOI: 10.1002/jbm.a.35369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/20/2014] [Accepted: 11/12/2014] [Indexed: 11/06/2022]
Abstract
Cell microencapsulation technology is a potential alternative therapy, but cell overgrowth and adhesion on the microcapsules after transplantation shortens their time of therapeutic efficacy. Inflammatory cells were the main cells that adhered to the microcapsules, so understanding the body's inflammatory processes would help to better identify the mechanisms of cell adhesion to the outer surface of the microcapsules. Our study measured the inflammatory cells and the cytokines and characterized the associated changes in the alginate-chitosan-alginate (ACA) microcapsules 1, 7, 14, and 28 days after implantation in the peritoneal cavity. Then the relationship between the inflammatory response and cell adhesion on the microcapsules was evaluated by multiple regression analysis. The results showed that the microcapsules did not evoke a systemic inflammatory response, but initiated a local inflammatory response in the peritoneal cavity. Furthermore, the correlation analysis showed that the level of cell adhesion on the microcapsules was related to the number of lymphocytes and macrophages, and the amount of IL-6, IL-10, and MCP-1 in the peritoneal cavity. Our results may provide a foundation for reducing the immune response to these microcapsules, prolonging graft survival and improving the efficacy of these treatments.
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Affiliation(s)
- Shen Li
- School of Life Science and Biotechnology, Dalian University of Technology, 2 Ling Gong Road, Dalian, 116044, China.,Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Ying Zhang
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Li Chen
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Na Li
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Hongguo Xie
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Xin Guo
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Shan Zhao
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Weiting Yu
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Yan Lv
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Guojun Lv
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Huijian Wu
- School of Life Science and Biotechnology, Dalian University of Technology, 2 Ling Gong Road, Dalian, 116044, China.,School of Life Science and Medicine, Dalian University of Technology, Panjin, China
| | - Xiaojun Ma
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
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