Repair of spinal cord injury in rats via exosomes from bone mesenchymal stem cells requires sonic hedgehog

Posted: 2021-09-15 19:00:00
Objective: The loss of neural ability leading to subsequent diminishing of motor function and the impairment below the location of the injury is a result of the SCI (Spinal Cord Injury). Among the many therapeutic agents for SCI, the exosomes considered as extracellular vesicles seem to be the most promising. Sonic Hedgehog (Shh) is an exosome-carrying protein. This Study's purpose was to identify whether Shh is required for exosomes from BMSCs (mesenchymal stem cells of the bone) and plays a protective effect on SCI. Methods: Spinal cord injection with shRNA Shh-adeno associated virus (sh-Shh-AAV) were used to silence Shh. Exosomes were extracted from BMSCs. Rats that had suffered SCI were given intravenous injections of exosomes through the veins of the tail. Immunohistochemistry was used to identify the expression of Shh glycoprotein molecule as well as the expression of Gli-1 (glioma-associated oncogene homolog 1) in the rat spinal cord tissues. Western blot was performed to measure the levels of growth associated protein-43 (GAP-43). The BBB (Basso Beattie Bresnahan) score was used to assess the motor functions of the hind legs. In the same manner, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling or TUNEL and Nissl Staining was deployed to assess the level of regeneration of neurons and assess the level of histopathological damage in the tissues of the Spinal Cord. Results: In the case of the rats with SCI, the levels of display of Gli-1 and Shh showed dramatic improvement after the BMSCs exosome injections. In comparison to rats with SCI, the subjects of BMSCs exosomes group showed an improvement in their SCI, including a higher BBB score and Nissl body count, increasing GAP-43 expression, along with a much-decreased number of cells that suffered apoptosis. While the exosome effect on Spinal Cord Injury was completely ineffective in rats that had Shh silencing. Conclusions: Exosomes secreted from BMSCs showed great effectiveness in the SCI healing with a vital involvement of Shh in this repair. Keywords: BMSCs; Exosomes; Sonic hedgehog; Spinal cord injury.

参考サイト PubMed: exsome


3月 07, 2019 バイオアソシエイツ


テキサス大学メディカルブランチ(UTMB)のRamkumar Menon博士が率いる研究者グループは、まだ確実ではないが分娩のタイミングにおけるキープレイヤーについて新たな洞察を見出した。この新しい情報によって、科学者たちは早産を防ぐことができるようになるかもしれない。 この研究は2019年1月24日にScientific Reportsにオンラインで発表された。 このオープンアクセスの論文は「 エクソソーム はマウスで早産を引き起こす:妊娠中の傍分泌シグナル伝達の証拠(Exosomes Cause…

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