Lead exposure induces neurodysfunction through caspase-1-mediated neuronal pyroptosis

Area of Science:

• Neuroscience
• Toxicology
• Cell Biology

Background:

• Chronic lead (Pb) exposure is a known cause of neurodysfunction and neurodegenerative diseases.
• The precise mechanisms underlying Pb-induced neurological damage remain incompletely understood.

Purpose of the Study:

• To investigate the role of pyroptosis in Pb-induced neurodysfunction in neurons.
• To determine if Pb exposure activates caspase-1-mediated pyroptosis and its link to neurological disorders.

Main Methods:

• Utilized in vitro and in vivo experimental models.
• Examined the activation of caspase-1 and its downstream effects in Pb-exposed neurons.
• Assessed the impact of caspase-1 inhibition on Pb-induced neurological deficits.

Main Results:

• Pb exposure induced caspase-1-mediated pyroptosis in neurons.
• This pyroptosis activated glycogen synthase kinase 3 by disrupting the Ca2+/CaMKII/CREB pathway, leading to neurological disorders.
• Inhibition of caspase-1 (VX-765) or treatment with sodium para-aminosalicylic acid (PAS-Na) ameliorated Pb-induced neurological damage by reducing pyroptosis.

Conclusions:

• Caspase-1-mediated pyroptosis in neurons is a key mechanism in Pb-induced neurodysfunction.
• Targeting caspase-1-mediated pyroptosis presents a potential therapeutic strategy to mitigate lead's neurotoxic effects.