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作 者:Tian Qin Chengjun Li Yan Xu Yiming Qin Yuxin Jin Rundong He Zixiang Luo Jinyun Zhao Chunyue Duan Hongbin Lu Yong Cao Jianzhong Hu
机构地区:[1]Department of Spine Surgery and Orthopaedics,Xiangya Hospital,Central South University,Xiangya Road 87,Changsha,410008,China [2]Key Laboratory of Organ Injury,Aging and Regenerative Medicine of Hunan Province,Xiangya Road 87,Changsha,410008,China [3]National Clinical Research Center for Geriatric Disorders,Xiangya Hospital,Central South University,Xiangya Road 87,Changsha,410008,China [4]Department of Sports Medicine,Xiangya Hospital,Central South University,Xiangya Road 87,Changsha,410008,China
出 处:《Bioactive Materials》2024年第3期424-443,共20页生物活性材料(英文)
基 金:funded by the National Natural Science Foundation of China(grant 82030071,82272495);the Science and Technology Major Project of Changsha,China(NO.kh2103008).
摘 要:Spinal cord injury(SCI)causes severe axon damage,usually leading to permanent paraparesis,which still lacks effective regenerative therapy.Recent studies have suggested that exosomes derived from neural stem cells(NSCs)may hold promise as attractive candidates for SCI treatment.Epidermal Growth Factor Receptor positive NSC(EGFR+NSC)is a subpopulation of endogenous NSCs,showing strong regenerative capability in central nervous system disease.In the current study,we isolated exosomes from the EGFR+NSCs(EGFR+NSCs-Exos)and discovered that local delivery of EGFR+NSCs-Exos can effectively promote neurite regrowth in the injury site of spinal cord-injured mice and improve their neurological function recovery.Using the miRNA-seq,we firstly characterized the microRNAs(miRNAs)cargo of EGFR+NSCs-Exos and identified miR-34a-5p which was highly enriched in EGFR+NSCs derived exosomes.We further interpreted that exosomal miR-34a-5p could be transferred to neurons and inhibit the HDAC6 expression by directly binding to its mRNA,contributing to microtubule stabilization and autophagy induction for aiding SCI repair.Overall,our research demonstrated a novel therapeutic approach to improving neurological functional recovery by using exosomes secreted from a subpopulation of endogenous NSCs and providing a precise cell-free treatment strategy for SCI repair.
关 键 词:Spinal cord injury EXOSOMES Neural regeneration miR-34a-5p HDAC6
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