Abstract
Necroptosis is a recently discovered programmed necrosis, regulated by receptor interacting protein kinase 1 (RIP1) and RIP3 after death signal stimulation and could be specifically inhibited by necrostatin-1. The aim of this study was to investigate the role of RIP1 and RIP3 signal pathways in a mouse model of collagenase-induced intracerebral hemorrhage (ICH) and assess the effect of necrostatin-1 on brain injury after ICH. We found that RIP1 and RIP3 proteins were abundantly expressed and increased in mice brain after ICH. Necrostatin-1 pretreatment improved neurological function and attenuated brain edema in mice after ICH. Moreover, necrostatin-1 reduced RIP1–RIP3 interaction and propidium iodide (PI) positive cell death, and further inhibited microglia activation and pro-inflammatory mediator genes [tumor necrosis factor-a (TNF-α) and interleukin-1β (IL-1β)] expression after ICH. These findings indicate that RIP1/RIP3-mediated necroptosis is an important mechanism of cell death after ICH. Through inhibiting necroptosis, necrostatin-1 plays a protective role in reducing necrotic cell death after ICH. Necrostatin-1 is a promising therapeutic agent that protects cells from necroptosis and improves functional outcome.
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Acknowledgments
This work was supported by Grants from the National Natural Science Foundation of China No. 81070974 and Youth Project of Fujian Provincial Department of Health (2014-1-59). The authors would like to thank Dr. Gengbao Feng for his technical assistance.
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The authors declare that they have no competing interests.
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Su, X., Wang, H., Kang, D. et al. Necrostatin-1 Ameliorates Intracerebral Hemorrhage-Induced Brain Injury in Mice Through Inhibiting RIP1/RIP3 Pathway. Neurochem Res 40, 643–650 (2015). https://doi.org/10.1007/s11064-014-1510-0
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DOI: https://doi.org/10.1007/s11064-014-1510-0