SARS-CoV-2 infection causes dopaminergic neuron senescence

Area of Science:

• Neuroscience
• Virology
• Stem Cell Biology

Background:

• Central nervous system (CNS) dysfunction is a common COVID-19 symptom.
• Dopamine (DA) neurons are implicated in neurological disorders.

Purpose of the Study:

• To investigate the susceptibility of human pluripotent stem cell-derived (hPSC) dopamine neurons to SARS-CoV-2.
• To identify potential therapeutic drugs for SARS-CoV-2-induced neurological damage.

Main Methods:

• Utilized hPSC-derived DA neurons to model SARS-CoV-2 infection.
• Performed high-throughput drug screening on infected neurons.
• Analyzed post-mortem human substantia nigra tissue from COVID-19 patients.

Main Results:

• hPSC-derived DA neurons are selectively vulnerable to SARS-CoV-2 infection.
• Infection induced inflammatory and cellular senescence responses.
• Identified FDA-approved drugs that protect against SARS-CoV-2-induced senescence.
• Observed reduced DA neuron numbers and fibers in severe COVID-19 patients.

Conclusions:

• hPSC-derived DA neurons provide a model for studying SARS-CoV-2 neurotropism.
• Candidate neuroprotective drugs were identified for potential COVID-19 neurological treatments.
• Long-term neurological monitoring is crucial for COVID-19 survivors.