Theoharides, Theoharis C, Twahir, Assma, Kempuraj, Duraisamy · Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology · 2024 · DOI
This study examines mast cells, which are immune cells found throughout the body, and how they may be involved in conditions like ME/CFS that affect the nervous system and cause abnormal heart rate and blood pressure responses. Mast cells sit near nerve endings and important organs, where they can release chemicals that affect how the body regulates basic functions like temperature and blood pressure. The researchers suggest that controlling mast cell activation might help treat these conditions, though currently there are no proven treatments.
This study is important because it proposes a biological mechanism that could unite ME/CFS symptoms (dysautonomia, neuroinflammation, post-exertional malaise) under a mast cell dysfunction hypothesis. If mast cells are indeed central to ME/CFS pathophysiology, it could open new avenues for targeted treatments beyond symptom management. Understanding this connection may also help explain why ME/CFS often co-occurs with other conditions sharing autonomic dysfunction.
This review does not provide direct experimental evidence that mast cells cause ME/CFS or prove causation rather than correlation. It does not demonstrate that mast cell inhibition would be effective or safe in ME/CFS patients, nor does it establish which specific mast cell mediators are responsible for particular ME/CFS symptoms. The study is theoretical and based on existing literature rather than new patient data.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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