Pathogen effects on the brain: the case of SARS-CoV-2 spike protein and neuro COVID - Summary - MDSpire

Pathogen effects on the brain: the case of SARS-CoV-2 spike protein and neuro COVID

  • By

  • Theoharis C. Theoharides

  • Paraskevi Papadopoulou

  • July 13, 2026

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Objective:

To explore how the SARS-CoV-2 Spike protein and neuroinflammatory molecules contribute to Long-COVID and related neurological disorders.

Approach:
  • Long-COVID Overview: Discusses the prevalence and symptoms of Long-COVID, including persistent fatigue, cognitive impairment, and neuropsychiatric disorders.
  • Epidemiology of Long-COVID: Examines the variation in Long-COVID prevalence across different SARS-CoV-2 variants, noting the highest rates associated with the ancestral strain.
  • Pathogenesis of Long-COVID: Addresses the unknown mechanisms of Long-COVID, focusing on immune responses, cytokine release, and the role of the Spike protein.
  • Microglia Activation: Highlights the role of microglia in neuroinflammation and their potential involvement in the neurological effects of COVID-19.
Key Findings:
  • Approximately 50% of SARS-CoV-2 infected patients develop Long-COVID symptoms, including fatigue, cognitive impairment, and neuropsychiatric disorders.
  • Long-COVID prevalence varies by SARS-CoV-2 variant, with the ancestral strain showing the highest rates.
  • Microglial activation and inflammation are implicated in the neurological effects of COVID-19.
Interpretation:

The mechanisms underlying Long-COVID are complex and involve direct neuroinflammation and immune responses.

Limitations:
  • The exact duration and long-term effects of Long-COVID remain unclear, and the pathogenesis is not fully understood.
Conclusion:

Further research is needed to elucidate the role of the Spike protein and neuroinflammatory processes in Long-COVID.

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