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SKP-SC-EVs-derived miRNA-30a-5p promote angiogenesis in peripheral nerve regeneration by targeting Lif and ANGPT2

ABSTRACT: SKP-SC-EVs-derived miRNA-30a-5p promote angiogenesis in peripheral nerve regeneration by targeting Lif and ANGPT2

PROVIDER: PRJNA1027829 | ENA |

REPOSITORIES: ENA

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SKP-SC-EVs-derived miRNA-30a-5p promote angiogenesis in peripheral nerve regeneration by targeting Lif and ANGPT2

Project description:Ischemia and hypoxia caused by vascular injury aggravate nerve injury. The extracellular vesicles from skin precursor-derived Schwann cells (SKP-SC-EVs) have proven to be beneficial to the regeneration of peripheral nerve injury, but whether SKP-SC-EVs can repair injured peripheral nerves by promoting angiogenesis remains unclear. Here, we found that SKP-SC-EVs enhanced the angiogenesis, which were verified by the transparency of tissue engineered nerve graft (TENG) and ultrasonic blood flow imaging. In vitro we verified that SKP-SC-EVs promote the proliferation, migration and tube formation of human umbilical vein endothelial cells (HUVECs), which were traditionally used for the evaluating angiogenesis capacity. Furthermore, the expression pattern of microRNA (miRNA) in SKP-SC-EVs was profiled and functional experiments were screened. Notably, miR-30a-5p was selected because of the remarkably pro-angiogenic ability in vivo and in vitro, which was similar to the effects of SKP-SC-EVs. Luciferase reporter assay and functional experiments revealed miR-30a-5p contained in SKP-SC-EVs promoted angiogenesis by targeting ANGPT2 and LIF in the insufficient of VEGFa. Taken together, miR-30a-5p enriched in SKP-SC-EVs may be a key regulator of angiogenesis for the cell-free treatment for peripheral nerve injury.

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Angiogenesis-promoting effect of SKP-SC-EVs-derived miRNA-30a-5p in peripheral nerve regeneration by targeting LIF and ANGPT2.

Project description:Ischemia and hypoxia caused by vascular injury intensify nerve damage. Skin precursor-derived Schwann cells have demonstrated an accelerated in vivo prevascularization of tissue-engineered nerves. Furthermore, extracellular vesicles from skin precursor-derived Schwann cells (SKP-SC-EVs) show the potential in aiding peripheral nerve regeneration. Nonetheless, the capacity of SKP-SC-EVs to facilitate nerve repair via angiogenesis remains uncertain. This study observed that SKP-SC-EVs significantly enhanced angiogenesis, evidenced by increased transparency of the tissue-engineered nerve graft and ultrasonic blood flow imaging. In vitro experiments confirmed that SKP-SC-EVs promote the proliferation, migration, and tube formation of human umbilical vein endothelial cells, a standard model for assessing angiogenic potential. Additionally, a comprehensive miRNA expression profile of SKP-SC-EVs was performed, leading to the identification of potential candidates through functional experiments. Among these, miR-30a-5p emerged as a significant candidate, demonstrating remarkable proangiogenic effects both in vivo and in vitro, akin to the effects of SKP-SC-EVs. Furthermore, luciferase reporter assay and functional experiments revealed that miR-30a-5p in SKP-SC-EVs promotes angiogenesis by targeting ANGPT2 and LIF without sufficient VEGFa. Thus, the enrichment of miR-30a-5p in SKP-SC-EVs indicates its pivotal role as a regulator of angiogenesis, presenting a promising avenue for cell-free treatment of peripheral nerve injury.

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