scholarly journals γδ T cells provide the early source of IFN-γ to aggravate lesions in spinal cord injury

2017 ◽  
Vol 215 (2) ◽  
pp. 521-535 ◽  
Author(s):  
Guodong Sun ◽  
Shuxian Yang ◽  
Guangchao Cao ◽  
Qianghua Wang ◽  
Jianlei Hao ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
T Cells ◽  
Functional Recovery ◽  
Γδ T Cells ◽  
Small Subset ◽  
Cell Functions ◽  
Tnf Α ◽  
Cord Injury ◽  
Ifn Γ

Immune responses and neuroinflammation are critically involved in spinal cord injury (SCI). γδ T cells, a small subset of T cells, regulate the inflammation process in many diseases, yet their function in SCI is still poorly understood. In this paper, we demonstrate that mice deficient in γδ T cells (TCRδ−/−) showed improved functional recovery after SCI. γδ T cells are detected at the lesion sites within 24 hours after injury and are predominantly of the Vγ4 subtype and express the inflammatory cytokine IFN-γ. Inactivating IFN-γ signaling in macrophages results in a significantly reduced production of proinflammatory cytokines in the cerebrospinal fluid (CSF) of mice with SCIs and improves functional recovery. Furthermore, treatment of SCI with anti-Vγ4 antibodies has a beneficial effect, similar to that obtained with anti–TNF-α. In SCI patients, γδ T cells are detected in the CSF, and most of them are IFN-γ positive. In conclusion, manipulation of γδ T cell functions may be a potential approach for future SCI treatment.

scholarly journals ifn-γ-dependent secretion of IL-10 from Th1 cells and microglia/macrophages contributes to functional recovery after spinal cord injury

2013 ◽  
Vol 4 (7) ◽  
pp. e710-e710 ◽  
Author(s):  
H Ishii ◽  
S Tanabe ◽  
M Ueno ◽  
T Kubo ◽  
H Kayama ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Functional Recovery ◽  
Th1 Cells ◽  
Cord Injury ◽  
Ifn Γ

scholarly journals Recruitment of γδ T cells to the lesion via the CCL2/CCR2 signaling after spinal cord injury

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Ping Xu ◽  
Feng Zhang ◽  
Min-min Chang ◽  
Cheng Zhong ◽  
Cheng-Hong Sun ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
T Cells ◽  
T Cell ◽  
Critical Role ◽  
Γδ T Cells ◽  
Motor Evoked Potential ◽  
Γδ T Cell ◽  
Cell Recruitment ◽  
Cord Injury

Abstract Background Immune cell infiltration and neuroinflammation are heavily associated with spinal cord injury (SCI). C-C motif chemokine ligand 2/C-C chemokine receptor type 2 (CCL2/CCR2) axis has been identified as a critical role player during the invasion of immune cells to lesions in many diseases. γδ T cells, a subgroup of T cells, manage the course of inflammation response in various diseases; however, it remains unknown whether γδ T cells are recruited to injury site through CCL2/CCR2 signaling and exert the regulation effect on neuroinflammation after SCI. Methods Basso Mouse Scale (BMS), regularity index, cadence, max contact area, and motor-evoked potential testing (MEP) were measured to determine the neurological function recovery after spinal cord injury. Nissl staining was performed to identify the number of surviving motor neurons at lesion epicenter. Immunofluorescence, Western blot, enzyme-linked immunosorbent assays (ELISA), and quantitative real-time polymerase chain reaction (QRT-PCR) also were employed to evaluate the expression of associated proteins and genes. Results In this study, we demonstrated that TCRδ−/− mice present improved neurological recovery after SCI. γδ T cell recruitment to the SCI site was significantly reduced and motor functional improvement enhanced in CCL2−/− and CCR2−/− mouse strains. Furthermore, reconstitution of TCRδ−/− mice with γδ T cells extracted from CCR2−/− mice also showed similar results to CCL2 and CCR2 deficient mice. Conclusions In conclusion, γδ T cell recruitment to SCI site promotes inflammatory response and exacerbates neurological impairment. CCL2/CCR2 signaling is a vital recruitment mechanism of γδ T cells to the SCI site, and it may be taken as a novel therapeutic target for future SCI.

scholarly journals Use of a Combination Strategy to Improve Morphological and Functional Recovery in Rats With Chronic Spinal Cord Injury

2020 ◽  
Vol 11 ◽  
Author(s):  
Roxana Rodríguez-Barrera ◽  
Adrián Flores-Romero ◽  
Vinnitsa Buzoianu-Anguiano ◽  
Elisa Garcia ◽  
Karla Soria-Zavala ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Functional Recovery ◽  
Combination Strategy ◽  
Chronic Spinal Cord Injury ◽  
Cord Injury

scholarly journals Exercise Ameliorates Spinal Cord Injury by Changing DNA Methylation

Cells ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 143
Author(s):  
Ganchimeg Davaa ◽  
Jin Young Hong ◽  
Tae Uk Kim ◽  
Seong Jae Lee ◽  
Seo Young Kim ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Motor Cortex ◽  
Functional Recovery ◽  
Treadmill Exercise ◽  
Exercise Group ◽  
Control Group ◽  
Epigenetic Changes ◽  
Cord Injury ◽  
The Brain

Exercise training is a traditional method to maximize remaining function in patients with spinal cord injury (SCI), but the exact mechanism by which exercise promotes recovery after SCI has not been identified; whether exercise truly has a beneficial effect on SCI also remains unclear. Previously, we showed that epigenetic changes in the brain motor cortex occur after SCI and that a treatment leading to epigenetic modulation effectively promotes functional recovery after SCI. We aimed to determine how exercise induces functional improvement in rats subjected to SCI and whether epigenetic changes are engaged in the effects of exercise. A spinal cord contusion model was established in rats, which were then subjected to treadmill exercise for 12 weeks. We found that the size of the lesion cavity and the number of macrophages were decreased more in the exercise group than in the control group after 12 weeks of injury. Immunofluorescence and DNA dot blot analysis revealed that levels of 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) in the brain motor cortex were increased after exercise. Accordingly, the expression of ten-eleven translocation (Tet) family members (Tet1, Tet2, and Tet3) in the brain motor cortex also elevated. However, no macrophage polarization was induced by exercise. Locomotor function, including Basso, Beattie, and Bresnahan (BBB) and ladder scores, also improved in the exercise group compared to the control group. We concluded that treadmill exercise facilitates functional recovery in rats with SCI, and mechanistically epigenetic changes in the brain motor cortex may contribute to exercise-induced improvements.

scholarly journals Non-invasive approaches to functional recovery after spinal cord injury: Therapeutic targets and multimodal device interventions

2021 ◽  
Vol 339 ◽  
pp. 113612
Author(s):  
Claudio Pizzolato ◽  
Mehmet A. Gunduz ◽  
Dinesh Palipana ◽  
Jingnan Wu ◽  
Gary Grant ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Functional Recovery ◽  
Therapeutic Targets ◽  
Non Invasive ◽  
Cord Injury
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