Bouquet, Jerome, Gardy, Jennifer L, Brown, Scott et al. · Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2017 · DOI
Researchers used genetic testing to compare blood samples from people with ME/CFS and a similar condition called alternative Lyme disease to healthy controls and people with lupus. They looked for differences in gene activity, immune cell patterns, and viral infections. Surprisingly, they found no major differences in gene activity between ME/CFS patients and healthy people, though they did find differences in lupus patients as expected.
This study directly investigates whether ME/CFS involves detectable changes in immune gene expression and viral infections—two leading biological hypotheses. The use of matched controls and validated RNA-seq methodology provides relatively robust evidence about baseline immune signatures in ME/CFS, helping clarify what mechanisms might or might not underlie the illness.
This study does not prove that ME/CFS has no biological basis; negative findings in gene expression do not exclude other pathophysiological mechanisms (metabolic dysfunction, mitochondrial abnormalities, post-exertional malaise mechanisms, etc.). Samples were collected at enrollment rather than during acute flares, so dysregulation during symptom exacerbation may have been missed. The absence of detected viral signatures does not rule out viral triggering early in disease or latent infections.
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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