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COVID-19

Unraveling the Mystery of Long-COVID and ME/CFS: A New Perspective on Vascular Damage

Strategic Insights

— 1 min read

Decades of research have shed light on the debilitating symptoms experienced by millions of people who recover from infections like COVID-19, influenza, and glandular fever, including chronic fatigue, brain fog, exercise intolerance, and gut problems. The World Health Organization has classified these symptoms as a post-viral fatigue syndrome, and they are recognized by both the WHO and the US Centers for Disease Control and Prevention as a brain disorder. Recent findings suggest that nearly half of people with ongoing post-COVID symptoms meet the criteria for ME/CFS, with over 400 million people estimated to have developed long-COVID since the start of the pandemic in 2020. A new review proposes a novel explanation for the biological processes underlying long-COVID and ME/CFS, focusing on endothelial cells and the cardiovascular system.

Key Takeaways:

  • Endothelial senescence, a condition where endothelial cells become "zombie-like" and stop dividing, is proposed as a key mechanism driving long-COVID and ME/CFS.
  • Viruses such as SARS-CoV-2, Epstein-Barr virus, and influenza A can trigger endothelial senescence, leading to tiny clots, reduced oxygen delivery, and chronic symptoms.
  • The "zombie cells" release molecules that awaken and confuse the immune system, preventing the clearance of senescent cells and creating a self-sustaining loop of vascular and immune dysfunction.
  • Long-COVID and ME/CFS frequently have impaired natural-killer cell function, sluggish macrophages, and complement dysfunction, allowing senescent endothelial cells to evade the immune system.
  • A registered clinical trial in the US is investigating senescence in long-COVID, and a new study is testing non-invasive imaging and fluorescent probes to reveal ageing endothelial cells in the body.

Sources:

  • The Conversation
  • World Health Organization
  • US Centers for Disease Control and Prevention

Statistics:

  • Nearly half of people with ongoing post-COVID symptoms meet the criteria for ME/CFS (Source: The Conversation).
  • Over 400 million people are estimated to have developed long-COVID since the start of the pandemic in 2020 (Source: The Conversation).
  • SARS-CoV-2 has been shown to induce senescence in a variety of cell types, including endothelial cells (Source: The Conversation).
  • Senescent endothelial cells may be involved in the development of long-COVID and ME/CFS, with implications for blood vessel damage and chronic symptoms (Source: The Conversation).
  • Immune dysfunction is common in ME/CFS and long-COVID, with impaired natural-killer cell function, sluggish macrophages, and complement dysfunction (Source: The Conversation).

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