Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury
MicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after SCI. However, the mechanisms by which OECs resto...
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doaj-d4d2a21a7e05449cb3e24056ef6ec0e82020-11-25T03:49:37ZengSAGE PublishingCell Transplantation1555-38922020-04-012910.1177/0963689720916173Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord InjuryZhengchao Gao0Yingjie Zhao1Xijing He2Zikuan Leng3Xiaoqian Zhou4Hui Song5Rui Wang6Zhongyang Gao7Yiqun Wang8Jiantao Liu9Binbin Niu10Haopeng Li11Pengrong Ouyang12Su’e Chang13 Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China Department of Radiology, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Spine and Spinal Cord Surgery, Henan Provincial People’s Hospital, Zhengzhou, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Medical College, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, China Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi Province, ChinaMicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after SCI. However, the mechanisms by which OECs restore function are not well understood. This study aims to determine whether silencing miR-199a-5p would enhance the beneficial effects of the OECs. In this study, we measured miR-199a-5p levels in rat spinal cords with and without injury, with and without OEC transplants. Then, we transfected OECs with the sh-miR-199a-5p lentiviral vector to reduce miR-199a-5p expression and determined the effects of these OECs in SCI rats by Basso–Beattie–Bresnahan (BBB) locomotor scores, diffusion tensor imaging (DTI), and histological methods. We used western blotting to measure protein levels of Slit1, Robo2, and srGAP2. Finally, we used the dual-luciferase reporter assay to assess the relationship between miR-199-5p and Slit1, Robo2, and srGAP2 expression. We found that SCI significantly increased miR-199a-5p levels ( P < 0.05), and OEC transplants significantly reduced miR-199a-5p expression ( P < 0.05). Knockdown of miR-199a-5p in OECs had a better therapeutic effect on SCI rats, indicated by higher BBB scores and fractional anisotropy values on DTI, as well as histological findings. Reducing miR-199a-5p levels in transplanted OECs markedly increased spinal cord protein levels of Slit1, Robo2, and srGAP2. Our results demonstrated that transplantation of sh-miR-199a-5p-modified OECs promoted functional recovery in SCI rats, suggesting that miR-199a-5p knockdown was more beneficial to the therapeutic effects of OEC transplants. These findings provided new insights into miRNAs-mediated therapeutic mechanisms of OECs, which helps us to develop therapeutic strategies based on miRNAs and optimize cell therapy for SCI.https://doi.org/10.1177/0963689720916173 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhengchao Gao Yingjie Zhao Xijing He Zikuan Leng Xiaoqian Zhou Hui Song Rui Wang Zhongyang Gao Yiqun Wang Jiantao Liu Binbin Niu Haopeng Li Pengrong Ouyang Su’e Chang |
spellingShingle |
Zhengchao Gao Yingjie Zhao Xijing He Zikuan Leng Xiaoqian Zhou Hui Song Rui Wang Zhongyang Gao Yiqun Wang Jiantao Liu Binbin Niu Haopeng Li Pengrong Ouyang Su’e Chang Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury Cell Transplantation |
author_facet |
Zhengchao Gao Yingjie Zhao Xijing He Zikuan Leng Xiaoqian Zhou Hui Song Rui Wang Zhongyang Gao Yiqun Wang Jiantao Liu Binbin Niu Haopeng Li Pengrong Ouyang Su’e Chang |
author_sort |
Zhengchao Gao |
title |
Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury |
title_short |
Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury |
title_full |
Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury |
title_fullStr |
Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury |
title_full_unstemmed |
Transplantation of sh-miR-199a-5p-Modified Olfactory Ensheathing Cells Promotes the Functional Recovery in Rats with Contusive Spinal Cord Injury |
title_sort |
transplantation of sh-mir-199a-5p-modified olfactory ensheathing cells promotes the functional recovery in rats with contusive spinal cord injury |
publisher |
SAGE Publishing |
series |
Cell Transplantation |
issn |
1555-3892 |
publishDate |
2020-04-01 |
description |
MicroRNAs (miRNAs) function as gene expression switches, and participate in diverse pathophysiological processes of spinal cord injury (SCI). Olfactory ensheathing cells (OECs) can alleviate pathological injury and facilitate functional recovery after SCI. However, the mechanisms by which OECs restore function are not well understood. This study aims to determine whether silencing miR-199a-5p would enhance the beneficial effects of the OECs. In this study, we measured miR-199a-5p levels in rat spinal cords with and without injury, with and without OEC transplants. Then, we transfected OECs with the sh-miR-199a-5p lentiviral vector to reduce miR-199a-5p expression and determined the effects of these OECs in SCI rats by Basso–Beattie–Bresnahan (BBB) locomotor scores, diffusion tensor imaging (DTI), and histological methods. We used western blotting to measure protein levels of Slit1, Robo2, and srGAP2. Finally, we used the dual-luciferase reporter assay to assess the relationship between miR-199-5p and Slit1, Robo2, and srGAP2 expression. We found that SCI significantly increased miR-199a-5p levels ( P < 0.05), and OEC transplants significantly reduced miR-199a-5p expression ( P < 0.05). Knockdown of miR-199a-5p in OECs had a better therapeutic effect on SCI rats, indicated by higher BBB scores and fractional anisotropy values on DTI, as well as histological findings. Reducing miR-199a-5p levels in transplanted OECs markedly increased spinal cord protein levels of Slit1, Robo2, and srGAP2. Our results demonstrated that transplantation of sh-miR-199a-5p-modified OECs promoted functional recovery in SCI rats, suggesting that miR-199a-5p knockdown was more beneficial to the therapeutic effects of OEC transplants. These findings provided new insights into miRNAs-mediated therapeutic mechanisms of OECs, which helps us to develop therapeutic strategies based on miRNAs and optimize cell therapy for SCI. |
url |
https://doi.org/10.1177/0963689720916173 |
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