TRPM7 contributes to pyroptosis and its involvement in status epilepticus

Area of Science:

• Neuroscience
• Cellular Biology
• Molecular Medicine

Background:

• Pyroptosis, a programmed cell death, is linked to neurodegeneration.
• The role of pyroptosis in status epilepticus (SE) is not well understood.

Purpose of the Study:

• To investigate the role of TRPM7 in pyroptosis during SE.
• To elucidate the signaling pathways involved in SE-induced pyroptosis.
• To evaluate potential therapeutic targets for SE.

Main Methods:

• SE was induced using pilocarpine in mouse models.
• Neuronal excitability was measured via EEG and patch clamp.
• ChIP assays identified p-STAT3 binding to Nlrp3 and Trpm7 promoters.
• TRPM7 knockdown and knockout models were used.
• Pharmacological inhibitors (NS8593, MCC950) and a novel compound (SDUY-225) were tested.

Main Results:

• Elevated IL-18, IL-1β, and TRPM7 expression were observed in SE.
• TRPM7 knockdown reduced neuronal damage, pyroptosis, and hyperexcitability.
• p-STAT3 was shown to regulate Trpm7 and Nlrp3 transcription in SE.
• Inhibition of TRPM7 and inflammasomes alleviated SE-related pathologies.
• SDUY-225 demonstrated neuroprotective effects in SE models.

Conclusions:

• TRPM7 contributes to pyroptosis in SE via a p-STAT3/TRPM7/Zn2+/p-STAT3 signaling pathway.
• Targeting TRPM7 and NLRP3 presents a potential therapeutic strategy for SE.