Zhang, Feilong, Wu, Chuanhong, Jia, Caixia et al. · Journal of affective disorders · 2019 · DOI
This study looked at whether depression and chronic fatigue syndrome (CFS) share common biological markers in the blood and urine. Researchers used advanced chemical testing and artificial intelligence to analyze samples from 295 people and found that depression and CFS have some overlapping chemical signatures, though they also have distinct differences. The findings suggest these two conditions may be more closely related than previously thought.
This work provides biological evidence that depression and ME/CFS share underlying metabolic abnormalities, which could explain why these conditions frequently co-occur and may inform more targeted treatment approaches. For patients, identifying specific biomarkers may eventually lead to better diagnostic tools and personalized interventions that address the shared biological basis of both conditions.
This study does not establish causation—it cannot determine whether depression causes fatigue, fatigue causes depression, or whether both stem from a common underlying mechanism. The cross-sectional design prevents any determination of temporal relationships, and the findings are correlational, requiring validation in independent cohorts before clinical application. Additionally, no longitudinal or interventional data are provided to demonstrate whether targeting these biomarkers would improve outcomes.
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 →
Spotted an error in this entry? Report it →