Ben-Zvi, Amos, Vernon, Suzanne D, Broderick, Gordon · PLoS computational biology · 2009 · DOI
People with ME/CFS often have abnormally low cortisol levels, a hormone that helps the body manage stress and energy. This study used mathematical computer modeling to design a new treatment approach: rather than giving more cortisol (the intuitive approach), the model suggests temporarily suppressing cortisol further until the body's signaling hormone (ACTH) rises enough to trigger the system to reset itself back to normal levels. This counterintuitive strategy could work by exploiting how the body's hormone system naturally behaves.
HPA axis dysfunction is a core physiological abnormality in ME/CFS, and current treatment approaches have limited efficacy. This study offers a paradigm shift suggesting that the counterintuitive strategy of transiently lowering cortisol further—rather than supplementing it—might exploit the body's own regulatory mechanisms to restore normal function. If validated clinically, this could lead to more effective and targeted treatments for this debilitating condition.
This is a computational modeling study and does not provide clinical evidence that the proposed treatment strategy actually works in patients. The model's assumptions about HPA axis dynamics may not capture all biological complexity. The study does not prove that hypocortisolism is the primary cause of ME/CFS symptoms, only that it is a measurable dysfunction that could theoretically be corrected.
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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Primary citation
Ben-Zvi, Amos, Vernon, Suzanne D, & Broderick, Gordon (2009). Model-based therapeutic correction of hypothalamic-pituitary-adrenal axis dysfunction.. PLoS computational biology. https://doi.org/10.1371/journal.pcbi.1000273
BibTeX
@article{mecfsatlas-ben-zvi-2009-model-based,
author = {Ben-Zvi, Amos and Vernon, Suzanne D and Broderick, Gordon},
title = {Model-based therapeutic correction of hypothalamic-pituitary-adrenal axis dysfunction.},
journal = {PLoS computational biology},
year = {2009},
doi = {10.1371/journal.pcbi.1000273},
note = {PubMed: 19165314},
url = {https://www.mecfsatlas.com/evidence/ben-zvi-2009-model-based},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/ben-zvi-2009-model-based
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