ArticleJournal of translational medicine2026
Gastrointestinal symptoms correlate with core clinical features and systemic inflammation in myalgic encephalomyelitis/chronic fatigue syndrome.
Article in Journal of translational medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMyalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a debilitating multisystem illness marked by fatigue, cognitive impairment, and post-exertional malaise. Gastrointestinal (GI) symptoms are frequently reported, yet their relationship to central features of the illness and biological correlates remains poorly understood.
objectivesWe aimed to characterize GI symptom burden in ME/CFS and evaluate its associations with core clinical features and specific immune and inflammatory markers, with attention to potential gut-related contributions to disease expression.
methodsGI symptoms and 49 additional symptoms across nine domains were assessed in 116 ME/CFS patients and 80 matched controls. Plasma C-reactive protein (CRP) and antibodies against dietary and microbial antigens were measured as indicators of systemic inflammation and putative gut-derived antigen exposure.
resultsME/CFS patients reported significantly elevated GI symptom frequency and severity compared with controls, with 53% of ME/CFS patients versus 8% of controls reporting a prior diagnosis of irritable bowel syndrome. GI symptom burden correlated with fatigue, cognitive difficulties, flu-like symptoms, pain, sleep disturbances, neurological complaints, and sensory sensitivities, independent of illness duration. CRP levels were higher in patients with greater GI symptoms and correlated with GI, fatigue, musculoskeletal pain, and flu-like symptom burden. Patients with greater flu-like symptom expression exhibited higher IgM responses to dietary gliadin and bacterial lipopolysaccharide. These associations were not detected in controls.
conclusionsGI symptoms are a prominent, clinically relevant dimension of ME/CFS, associated with broader symptom burden and inflammatory heterogeneity. These findings highlight the relevance of gut-related and immune processes in ME/CFS and underscore the value of incorporating GI symptom assessment in translational studies to help refine mechanistic understanding and improve therapeutic stratification.
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