SOCS3 Attenuates GM-CSF/IFN-γ-Mediated Inflammation During Spontaneous Spinal Cord Regeneration.
10.1007/s12264-020-00493-8
- Author:
Xuejie ZHANG
1
;
Bingqiang HE
1
;
Hui LI
1
;
Yingjie WANG
1
;
Yue ZHOU
2
;
Wenjuan WANG
1
;
Tiancheng SONG
1
;
Nan DU
1
;
Xingxing GU
1
;
Yi LUO
1
;
Yongjun WANG
3
Author Information
1. Key laboratory of Neuroregeneration of Jiangsu and The Ministry of Education, Nantong University, Nantong, 226001, China.
2. Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, 226001, China.
3. Key laboratory of Neuroregeneration of Jiangsu and The Ministry of Education, Nantong University, Nantong, 226001, China. wyjbs@ntu.edu.cn.
- Publication Type:Journal Article
- Keywords:
Cytokine;
Inflammation;
SOCS3;
Spinal cord;
Vertebrate
- From:
Neuroscience Bulletin
2020;36(7):778-792
- CountryChina
- Language:English
-
Abstract:
SOCS3, a feedback inhibitor of the JAK/STAT signal pathway, negatively regulates axonal regrowth and inflammation in the central nervous system (CNS). Here, we demonstrated a distinct role of SOCS3 in the injured spinal cord of the gecko following tail amputation. Severing the gecko spinal cord did not evoke an inflammatory cascade except for an injury-stimulated elevation of the granulocyte/macrophage colony-stimulating factor (GM-CSF) and interferon gamma (IFN-γ) cytokines. Simultaneously, the expression of SOCS3 was upregulated in microglia, and unexpectedly not in neurons. Enforced expression of SOCS3 was sufficient to suppress the GM-CSF/IFN-γ-driven inflammatory responses through its KIR domain by attenuating the activities of JAK1 and JAK2. SOCS3 was also linked to GM-CSF/IFN-γ-induced cross-tolerance. Transfection of adenovirus overexpressing SOCS3 in the injured cord resulted in a significant decrease of inflammatory cytokines. These results reveal a distinct role of SOCS3 in the regenerating spinal cord, and provide new hints for CNS repair in mammals.
