Journal
BIOMEDICINE & PHARMACOTHERAPY
Volume 114, Issue -, Pages -Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.biopha.2019.108683
Keywords
Febrile seizure; MicroRNA-223; Brain injury; Hippocampal neurons; NLRP3-Caspase-1 signaling pathway; Learning and memory ability; Inflammatory injury
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Objective: This study is conducted to explore the role of microRNA-223 (miR-223) in brain injury and apoptosis of hippocampal neurons through the NLRP3-Caspase-1 signaling pathway in febrile seizure (FS) rats. Methods: The models of FS were induced in rats by hot water-bath, which were stereotactically injected with miR-223 mimics and mimics negative control (NC) to perturb the expression of miR-223. A series of experiments was conducted to find out the potential mechanisms of miR-223 on convulsion attack, learning and memory ability, pathological injury of hippocampal neurons, inflammatory injury, apoptosis of hippocampal neurons in FS rats. Besides, the targeting relationship between miR-223 and NLRP3 was also verified. Results: Low expression of miR-223 was found in hippocampus tissues of FS rats. Up-regulation of miR-223 alleviated convulsion attack and improved learning and memory ability, while inhibiting pathological injury of hippocampal neurons and inflammatory injury in FS rats. Up-regulation of miR-223 promoted the survival of hippocampal neurons and inhibited their apoptosis in FS rats. MiR-223 inhibited the activation of NLRP3-Caspase-1 signaling pathway in hippocampus tissues of FS rats by inhibiting NLRP3. Conclusion: The inhibited expression of miR-223 after FS may participate in the activation of the NLRP3-Caspase-1 signaling pathway, resulting in brain injury and apoptosis of hippocampal neurons in rat models of FS.
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