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Decrease of Cellular Communication Network Factor 1 (CCN1) Attenuates PTZ-Kindled Epilepsy in Mice

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Abstract

To investigate the molecular mechanism of communication network factor 1 (CCN1) regulating pentylenetetrazol (PTZ)-induced epileptogenesis, deepen the understanding of epilepsy seizure pathogenesis, and provide new drug action targets for its clinical prevention and treatment. Differentially expressed genes (DEGs) on microarrays GSE47516 and GSE88992 were analyzed online using GEO2R. Pathway enrichment and protein–protein interaction network (PPI) analysis of DEGs were carried out using Metascape. Brain tissue samples of severe traumatic brain injury patients (named Healthy group) and refractory epilepsy patients (named Epilepsy group) were obtained and analyzed by qRT-PCR and immunohistochemistry (IHC) staining. A PTZ-induced epilepsy mouse model was established and verified. Morphological changes of neurons in mouse brain tissue were detected using hematoxylin and eosin (HE) staining. qRT-PCR was conducted to detect the mRNA expressions of apoptosis-associated proteins Bax, Caspase-3 and bcl2. TUNEL staining was performed to detect brain neuron apoptosis. The levels of myocardial enzymology, GSH, MDA and ROS in blood of mouse were detected by biochemical assay. CCN1 expression was increased in epilepsy brain tissue samples. CCN1 decreasing effectively prolongs seizure incubation period and decreases seizure duration. Silencing of CCN1 also reduces neuronal damage and apoptosis, decreases mRNA and protein expression of proapoptotic proteins Bax and Caspase-3, increases mRNA expression of antiapoptotic protein Bcl2. Moreover, decrease of CCN1 decreases myocardial enzymatic indexes CK and CK-MB levels, reduces myocardial tissue hemorrhage, and relieves oxidative stress response in hippocampal and myocardial tissue. CCN1 expression is increased in epileptic samples. CCN1 decreasing protects brain tissue by attenuating oxidative stress and inhibiting neuronal apoptosis triggered by PTZ injection, which probably by regulating Nrf2/HO-1 pathway.

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The data supporting this study's findings are available from the corresponding author upon reasonable request.

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Acknowledgements

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Funding

This study was supported by National Natural Science Foundation of China (Grant no: 82001379, 81771403 and 81974205), Natural Science Foundation of Hunan Province, China (Grant No: 2020JJ5952) and Natural Science Foundation of Zhejiang Province, China (Grant no: LZ20H090001).

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YL performed the experiments and wrote the paper. SH and YZ coordinated the animal experiment. HhZ collected the samples and assisted with the experiments. HtZ conceived the study, designed the experiments, and revised the paper. All the authors have read and approved the final manuscript.

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Correspondence to Haiting Zhao.

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The authors have not disclosed any competing interests.

Ethical Approval and Consent to Participate

All the procedures were approved by the Medical Ethics Committee of Xiangya Hospital of Central South University (approval number: 202009499). All the animal experimental procedures were approved by the Experimental Animal Welfare Ethics Committee of Xiangya Hospital of Central South University (approval number: 2020sydw0635).

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Liao, Y., Huang, S., Zhang, Y. et al. Decrease of Cellular Communication Network Factor 1 (CCN1) Attenuates PTZ-Kindled Epilepsy in Mice. Cell Mol Neurobiol 43, 4279–4293 (2023). https://doi.org/10.1007/s10571-023-01420-x

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  • DOI: https://doi.org/10.1007/s10571-023-01420-x

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