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miR-sc3, a Novel MicroRNA, Promotes Schwann Cell Proliferation and Migration by Targeting Astn1

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MicroRNAs (miRNAs, miRs) are small noncoding RNAs that regulate gene expression at the posttranscriptional level. We have previously identified a group of novel miRNAs in proximal sciatic nerve after sciatic nerve transection by Solexa sequencing, and miR-sc3 is a member of the group. In this study, we aimed to investigate the effects of miR-sc3 on phenotypic modulation of Schwann cells (SCs). miR-sc3 was highly expressed in the injured nerve after sciatic nerve transection. An increased and decreased expression of miR-sc3 promoted and reduced the proliferation and migration of primary SCs, respectively. miR-sc3 directly targeted astrotactin 1 (Astn1) and led to translational suppression of Astn1. There was an inverse association between the time-dependent expressions of miR-sc3 and Astn1 in proximal sciatic nerve after sciatic nerve transection. Overall, miR-sc3 affected SC proliferation and migration by targeting Astn1, thus playing the regulatory role in peripheral nerve regeneration.
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Keywords: Astrotactin 1 (Astn1); Migration; Proliferation; Schwann cells (SCs); miR-sc3

Document Type: Research Article

Publication date: 21 April 2016

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