Abstract
IL-35 has been identified as a novel anti-inflammatory cytokine that belongs to the IL-12 cytokine family and has been verified to play a protective role in autoimmune diseases. In this study, we investigated the protective effects of IL-35 on cerebral ischemia/reperfusion (I/R) injury in a middle cerebral artery occlusion mouse model. We determined that the expression of IL-35 was initially decreased and subsequently increased in I/R injury. Moreover, IL-35 (i.c.v.) pre- and posttreatment significantly reduced the infarct volume and improved neurological deficits after 45 min of ischemia and 24 h of reperfusion. Importantly, IL-35 treatment improved neurological function recovery, particularly in balance ability, at 14 days after treatment. Finally, our results showed that IL-35 treatment reduced the expression of IL-6 and IL-1β, which are confirmed proinflammatory cytokines, thus indicating that these cytokines have both been linked to the anti-inflammatory mechanisms of IL-35. Therefore, IL-35 may be a key immune mediator in brain ischemic injury and appears to have promising potential for clinical trials.
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Abbreviations
- IL:
-
Interleukin
- CSF:
-
Cerebrospinal fluid
- STAT:
-
Signal transducers and activators of transcription
- KO:
-
Knockout
- GAPDH:
-
Glyceraldehyde 3-phosphate dehydrogenase
- SDS-PAGE:
-
Sodium dodecyl sulfate-polyacrylamide gel electrophoresis
- PBS:
-
Phosphate buffered solution
- DMSO:
-
Dimethyl sulfoxide
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Acknowledgements
This work was supported by the Neurology Clinical Research Foundation of Suzhou. The funders have no role in the study design or data collection.
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All authors were involved in drafting the article or critically revising it for important intellectual content, and all authors approved the final version for publication. ZZ and ZH conceived and supervised the project; XC and ZHao wrote the manuscript and generated the final figures. All experimental procedures and data analysis were performed by XC, ZH, SR and FQ; XC and FQ contributed to test behavioral experiments; XC and ZHao contributed to data analysis.
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Xu, C., Zhu, H., Shen, R. et al. IL-35 is a Protective Immunomodulator in Brain Ischemic Injury in Mice. Neurochem Res 43, 1454–1463 (2018). https://doi.org/10.1007/s11064-018-2560-5
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DOI: https://doi.org/10.1007/s11064-018-2560-5