Spatiotemporal evolution of pyroptosis and canonical inflammasome pathway in hSOD1G93A ALS mouse model

作者：Haoyun Zhang, Hao Li, Bingkun Huang, Shaoye Wang, Ying Gao, Fandi Meng, Yanchun Chen, Fenghua Zhou, Yingjun Guan, Xin Wang · 发表于：BMC Neuroscience · 年份：2022 · DOI：10.1186/s12868-022-00733-9 · 被引用次数：22 · 研究领域：Inflammasome and immune disorders、Amyotrophic Lateral Sclerosis Research、Spinal Cord Injury Research

BACKGROUND: Evidences indicate that inflammasome compounds participate in amyotrophic lateral sclerosis (ALS), a fatal progressive motoneuron degenerative disease. Researchers have observed the expressions of nucleotide oligomerization domain (NOD)-like receptor protein 3 (NLRP3) related inflammasome components in specific regions of the central nervous system in different ALS models, but the cellular spatiotemporal evolution of this canonical inflammasome pathway and pyroptosis during ALS progression are unclear. METHODS: mice (ALS mice) and age-matched littermates (CON mice) were dissected at pre-symptomatic stage (60 d), early- symptomatic stage (95 d), symptomatic stage (108 d) and late-symptomatic stage (122 d) of the disease. By using Nissl staining, double immunofluorescence labelling, qRT-PCR or western blot, we detected morphology change and the expression, cellular location of GSDMD, NLRP3, caspase-1 and IL-1β in the ventral horn of lumbar spinal cords over the course of disease. RESULTS: double positive cells were observed in ventral horn from ALS mice even at 60 d of age, even though there were no changes of GSDMD mRNA and protein expressions at this stage compared with CON mice. With disease progression, compared with age-matched CON mice, increased expressions of GSDMD, NLRP3, activated caspase-1 and IL-1β were detected. Double immunofluorescence labeling revealed that NLRP3, caspase-1, IL-1β positive signals mainly localized in ventral horn neurons at pre- and ...