Claudin 14/15 play important roles in early wallerian degeneration after rat sciatic nerve injury.
10.1016/j.cjtee.2021.04.004
- Author:
Min CAI
1
,
2
;
Jian SHAO
3
;
Yi WANG
3
;
Bryant YUNG
3
;
Jian-Nan LI
4
;
Huan-Huan ZHANG
3
;
Yu-Ting LI
3
;
Deng-Bing YAO
5
Author Information
1. School of Life Sciences, Co-innovation Center of Neuroregeneration, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, Nantong, 226019, Jiangsu Province, China
2. Medical School of Nantong University, Nantong, 226001, Jiangsu Province, China.
3. School of Life Sciences, Co-innovation Center of Neuroregeneration, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, Nantong, 226019, Jiangsu Province, China.
4. China-Japan Union Hospital of Jilin University, Changchun, 130033, China.
5. School of Life Sciences, Co-innovation Center of Neuroregeneration, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, Nantong, 226019, Jiangsu Province, China. Electronic address: yaodb@ntu.edu.cn.
- Publication Type:Journal Article
- Keywords:
Claudin 14/15;
Nerve regeneration;
Schwann cells;
Sciatic nerve;
Tight junctions;
Wallerian degeneration
- MeSH:
Animals;
Claudins;
Nerve Regeneration;
Peripheral Nerve Injuries;
Rats;
Schwann Cells/pathology*;
Sciatic Nerve;
Wallerian Degeneration/pathology*
- From:
Chinese Journal of Traumatology
2021;24(6):374-382
- CountryChina
- Language:English
-
Abstract:
PURPOSE:Wallerian degeneration (WD) is an antegrade degenerative process distal to peripheral nerve injury. Numerous genes are differentially regulated in response to the process. However, the underlying mechanism is unclear, especially the early response. We aimed at investigating the effects of sciatic nerve injury on WD via CLDN 14/15 interactions in vivo and in vitro.
METHODS:Using the methods of molecular biology and bioinformatics analysis, we investigated the molecular mechanism by which claudin 14/15 participate in WD. Our previous study showed that claudins 14 and 15 trigger the early signal flow and pathway in damaged sciatic nerves. Here, we report the effects of the interaction between claudin 14 and claudin 15 on nerve degeneration and regeneration during early WD.
RESULTS:It was found that claudin 14/15 were upregulated in the sciatic nerve in WD. Claudin 14/15 promoted Schwann cell proliferation, migration and anti-apoptosis in vitro. PKCα, NT3, NF2, and bFGF were significantly upregulated in transfected Schwann cells. Moreover, the expression levels of the β-catenin, p-AKT/AKT, p-c-jun/c-jun, and p-ERK/ERK signaling pathways were also significantly altered.
CONCLUSION:Claudin 14/15 affect Schwann cell proliferation, migration, and anti-apoptosis via the β-catenin, p-AKT/AKT, p-c-jun/c-jun, and p-ERK/ERK pathways in vitro and in vivo. The results of this study may help elucidate the molecular mechanisms of the tight junction signaling pathway underlying peripheral nerve degeneration.
