Volume 11, Issue 1 (Vol.11 No.1 Apr 2022)                   rbmb.net 2022, 11(1): 63-73 | Back to browse issues page


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Govindasamy N, Chok K C, Ng P Y, Koh R Y, Chye S M. Melatonin Induced Schwann Cell Proliferation and Dedifferentiation Through NF-ĸB, FAKDependent but Src-Independent Pathways. rbmb.net 2022; 11 (1) :63-73
URL: http://rbmb.net/article-1-692-en.html
Division of Biomedical Science and Biotechnology, School of Health Science, International Medical University.
Abstract:   (2605 Views)
Background: Peripheral nerve injury (PNI) is a common condition that compromises motor and sensory functions. Peripheral nerves are known to have regenerative capability and the pineal hormone, melatonin, is known to aid nerve regeneration. However, the role of Schwann cells and the pathways involved remain unclear. Thus, the aim of this study is to identify the effects of melatonin on Schwann cell proliferation, dedifferentiation, and the involvement of nuclear factor kappa light chain enhancer of activated B cells (NFĸB), focal adhesion kinase (FAK) and proto-oncogene tyrosine-protein kinase, Src pathways in this process.

Methods: Schwann cells was treated with melatonin and its proliferation and dedifferentiation were identified using MTT assay and immunofluorescence staining for SRY (sex determining region Y)-box 2 (SOX2). Next, the protein expressions of NF-ĸB, FAK and Src pathways were identified by Western blot.

Results: MTT results confirmed increased proliferation of Schwann cells with melatonin treatment, and it was highest at 10 μM melatonin. Immunofluorescent staining revealed an increase in the green fluorescence staining for SOX2 in melatonin-treated cells, showing enhanced dedifferentiation. Western blot assay revealed melatonin increased phospho-NF-ĸB (PNF-ĸB), IKK-α, FAK (D2R2E), phospho-FAK (Tyr 576/577 and Tyr 397) protein expressions as compared with control. However, Src (32G6), Lyn (C13F9), Fyn, Csk (C74C1) protein expressions were not increased as compared with control.

Conclusions: Melatonin promotes Schwann cell proliferation and dedifferentiation via NF-ĸB, FAKdependent but Src-independent pathways.
Full-Text [PDF 392 kb]   (1060 Downloads)    
Type of Article: Original Article | Subject: Cell Biology
Received: 2021/04/25 | Accepted: 2021/08/15 | Published: 2022/05/26

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