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Analyzing Murine Schwann Cell Development Along Growing Axons
Published on: November 21, 2012
miR-328a-3p modulates the proliferative and migratory abilities of Schwann cells in peripheral nerves
Pingping Qiao1, Wenshuang Wu1, Yumeng Wu2
1Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, NMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology Products, Nantong University, Nantong, Jiangsu 226001, China.
Abstract:
MicroRNAs (miRNAs) modulate Schwann cell phenotype. Here miR-328a-3p amounts after peripheral nerve damage were determined in injury stumps of the sciatic nerve in rats administered surgical crush. Quantitative real-time reverse transcription-polymerase chain reaction was performed to assess miR-328a-3p levels 0, 1, 4, 7 and 14 days post-sciatic nerve damage. The results showed miR-328a-3p was upregulated after nerve damage. CCK8 and EdU assays revealed elevated miR-328a-3p amounts suppressed Schwann cell viability and proliferation, respectively. Next, the migratory potential of cells was assessed by the Transwell chamber and wound healing assays. We found elevated miR-328a-3p amounts also suppressed Schwann cell migration. Conversely, low miR-328a-3p amounts promoted Schwann cell migration. The possible miR-328a-3p targets were predicted by bioinformatics. The 15 target genes retrieved provided insights into miR-328a-3p's effects on Schwann cells and expanded the understanding of miR-328a-3p's biological functions in the peripheral nervous system. Collectively, these findings revealed miR-328a-3p's effects on Schwann cells and provided further insights into the functions of miRNAs in peripheral nerves.
Insights
MicroRNAs (miRNAs) regulate Schwann cell function. Following sciatic nerve injury in rats, miR-328a-3p levels increased, suppressing Schwann cell viability, proliferation, and migration, impacting peripheral nerve repair.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression.
- Schwann cells are crucial for peripheral nerve function and repair.
- Peripheral nerve damage triggers complex cellular responses, including miRNA modulation.
Purpose of the Study:
- To investigate the role of miR-328a-3p in Schwann cells following sciatic nerve injury.
- To determine the impact of miR-328a-3p on Schwann cell viability, proliferation, and migration.
Main Methods:
- Sciatic nerve crush injury model in rats.
- Quantitative real-time reverse transcription-polymerase chain reaction (qRT-PCR) for miRNA quantification.
- Cell Counting Kit-8 (CCK8) and EdU assays for cell viability and proliferation.
- Transwell chamber and wound healing assays for cell migration.
Main Results:
- miR-328a-3p expression was significantly upregulated in rat sciatic nerves post-injury.
- Elevated miR-328a-3p suppressed Schwann cell viability and proliferation.
- Increased miR-328a-3p levels inhibited Schwann cell migration, while decreased levels promoted it.
Conclusions:
- miR-328a-3p plays a critical role in modulating Schwann cell behavior after peripheral nerve damage.
- Understanding miR-328a-3p's function provides insights into peripheral nerve regeneration mechanisms.
- Target gene prediction offers further avenues for exploring miR-328a-3p's biological functions in the nervous system.
