Abstract
Pyroptosis is a new type of programmed cell death, which induces a strong pro-inflammatory reaction. However, the mechanism of pyroptosis after brain ischemia/reperfusion (I/R) and the interaction between different neural cell types are still unclear. This study comprehensively explored the mechanisms and interactions of microglial and neuronal pyroptosisin the simulated I/R environment in vitro. The BV2 (as microglial) and HT22(as neuronal) cells were treated by oxygen–glucose deprivation/reoxygenation (OGD/R). Both BV2 and HT22 cells underwent pyroptosis after OGD/R, and the pyroptosis occurred at earlier time point in HT22than that of BV2. Caspase-11 and Gasdermin E expression in BV2 and HT22 cells did not change significantly after OGD/R. Inhibition of caspase-1 or GSDMD activity, or down-regulation of GSDMD expression, alleviated pyroptosis in both BV2 and HT22 cells after OGD/R. Transwell studies further showed that OGD/R-treated HT22 or BV2 cells aggravated pyroptosis of adjacent non-OGD/R-treated cells, which could be relieved by inhibition of caspase-1 or GSDMD. These results suggested that OGD/R induces pyroptosis of microglia and neuronal cells and aggravates cell injury via activation of caspase-1/GSDMD signaling pathway. Our findings indicated that caspase-1 and GSDMD may be therapeutic targets after cerebral I/R.
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Data Availability
Datasets analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors would thank Research Center of Medicine, Sun Yat-Sen Memorial Hospital for providing necessary infrastructure support to accomplish this work. This research was supported by the Natural Science Foundation of Guangdong Province, China (2017A030313869) and the Science and Technology Project of Guangzhou City, China (201607010325), the National Natural Science Foundation of China (No. 81171103, 82001370) and Guangdong Science and Technology Department (2017B030314026).
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ZFD, KP, YDW and WJL, conceived and designed the experiments. ZFD and QXP performed the experiments and analyzed the data. YDW and WJL contributed reagents/materials/analysis tools. ZFD wrote the first draft of the paper. WJL and YDW contributed to the writing of the paper. ZFD and QXP contributed equally to this work. All authors read and approved the final manuscript.
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Dong, Z., Peng, Q., Pan, K. et al. Microglial and Neuronal Cell Pyroptosis Induced by Oxygen–Glucose Deprivation/Reoxygenation Aggravates Cell Injury via Activation of the Caspase-1/GSDMD Signaling Pathway. Neurochem Res 48, 2660–2673 (2023). https://doi.org/10.1007/s11064-023-03931-x
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DOI: https://doi.org/10.1007/s11064-023-03931-x