Journal Article

Astrocyte-derived SerpinA3N promotes neuroinflammation and epileptic seizures by activating the NF-κB signaling pathway in mice with temporal lobe epilepsy

Liu, Chong, Wang, Hui-Zhi, Zhang, Liang-Wen, Zhao, Xue-Min, Zhou, Si-Yu, Liang, Kun, Gao, Yuan, Li, Ren-Peng, Xue, Tao, Du, Ting-Ting, Han, Chun-Lei, Wang, Qiao, Zhang, Jian-Guo, Shi, Lin, Zhang, Mo-Xuan, Meng, Fan-Gang

2023

Overview

Impaired activation and regulation of the extinction of inflammatory cells and molecules in injured neuronal tissues are key factors in the development of epilepsy. SerpinA3N is mainly associated with the acute phase response and inflammatory response. In our current study, transcriptomics analysis, proteomics analysis, and Western blotting showed that the expression level of Serpin clade A member 3N (SerpinA3N) is significantly increased in the hippocampus of mice with kainic acid (KA)-induced temporal lobe epilepsy, and this molecule is mainly expressed in astrocytes. Notably, in vivo studies using gain- and loss-of-function approaches revealed that SerpinA3N in astrocytes promoted the release of proinflammatory factors and aggravated seizures. Mechanistically, RNA sequencing and Western blotting showed that SerpinA3N promoted KA-induced neuroinflammation by activating the NF-κB signaling pathway. In addition, co-immunoprecipitation revealed that SerpinA3N interacts with ryanodine receptor type 2 (RYR2) and promotes RYR2 phosphorylation. Overall, our study reveals a novel SerpinA3N-mediated mechanism in seizure-induced neuroinflammation and provides a new target for developing neuroinflammation-based strategies to reduce seizure-induced brain injury.

• Publisher: BioMed Central,Springer Nature B.V,BMC
• Subject: Alzheimer's disease / Animals / Astrocytes / Astrocytes - metabolism / Biomedical and Life Sciences / Biomedicine / Brain injury / Brain research / Convulsions & seizures / Epilepsy / Epilepsy - metabolism / Epilepsy, Temporal Lobe - chemically induced / Epilepsy, Temporal Lobe - metabolism / Epileptic seizures / Genes / Hippocampus - metabolism / Immunology / Immunoprecipitation / Inflammation / Kainic acid / Kainic Acid - toxicity / Laboratory animals / Mice / Multi-omics analysis / Neurobiology / Neuroinflammation / Neuroinflammatory Diseases / Neurology / Neurosciences / NF-kappa B - metabolism / NF-κB protein / Pathogenesis / Phosphorylation / Proteins / Proteomics / Ryanodine Receptor Calcium Release Channel - adverse effects / Ryanodine Receptor Calcium Release Channel - metabolism / Ryanodine receptors / Seizures / Seizures - chemically induced / Seizures - metabolism / SerpinA3N / Signal Transduction / Temporal lobe / Temporal lobe epilepsy / Transcriptomics / Traumatic brain injury / Western blotting