Are circulating FGF21 and NT-proBNP promising novel biomarkers in Myalgic Encephalomyelitis/ Chronic Fatigue Syndrome?, by Prof Joan Carles Domingo, Dr Begoña Cordobilla, Dr Roser Ferrer, Dr Marina Giralt, Dr Jose Alegre-Martin, and Dr Jesus Castro-Marrero in Antioxidants & Redox Signaling, 22 Dec 2020 [doi.org/10.1089/ars.2020.8230]
Research abstract:
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a chronic, disabling, and complex multisystem illness of unknown etiology. The protein FGF21 regulates glucose homeostasis and lipid metabolism, and the protein NT-proBNP is strongly associated with an elevated cardiovascular risk; however, little is known about their role in ME/CFS patients. To address this gap, we explored the association between FGF21 and NT-proBNP and oxidative stress and inflammatory markers in ME/CFS.
Twenty-one ME/CFS patients and 20 matched healthy controls were included in the study. Participants filled out validated self-reported questionnaires on their current health status covering demographic and clinical characteristics. Plasma showed significantly decreased total antioxidant capacity and increased lipoperoxides levels (p = 0.009 and p = 0.021, respectively) in ME/CFS. These ME/CFS patients also had significantly increased levels of inflammatory cytokines (IL-1β, IL-6, IL-10, TNF-α, and C-reactive protein (p < 0.05 for all) but not for IL-8 (p = 0.833) in ME/CFS, indicating low-grade systemic inflammation status.
Circulating FGF21 and NT-proBNP levels were significantly higher (p < 0.0001 and p = 0.005, respectively) in ME/CFS patients than in healthy controls. Significantly positive correlations were found between NT-proBNP levels and IL-1β and IL-6 (p = 0.04 and p = 0.01) in ME/CFS patients but not between FGF21 and these cytokines. In contrast, no significant correlations were found for either FGF21 or NT-proBNP in controls.
These findings lead to the hypothesis that elevated FGF21 and NT-proBNP levels and the association between NT-proBNP and inflammation may be promising novel diagnostic and therapeutic targets in ME/CFS.

The diagnosis of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is problematic due to the lack of established objective measurements. Post-exertional malaise (PEM) is a hallmark of ME/CFS, and the two-day cardiopulmonary exercise test (CPET) has been tested as a tool to assess functional impairment in ME/CFS patients. This study aimed to estimate the potential of the CPET.
A manifesto at least
Sandra had severe ME for 20 years and associated chemical sensitivity for the last 10, which made it difficult for her to visit buildings to discuss her medical or social care needs. Even ambulances were a difficult environment for her and her health had been deteriorating for some time. She suffered a lot of misunderstanding and dismissal over the years from people whose job it was to help her. In spite of this she fought hard to explain severe ME to them. She contributed her experiences to the Hywel Dda ME stakeholder group, although it cost her a lot.



There was much in the guideline to be pleased about and we are grateful to those on the guideline committee, and to those who supplied evidence to the committee. The guideline included annexes and was accompanied by 13 other documents, so there was a lot to read and absorb in the 6 week consultation period! Inevitably we will not have picked up all the issues that needed to be addressed, but hopefully, in combination with other patient groups’ responses, our comments will have represented people in Wales and will make a difference.
The post-exertional malaise of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) was modeled by comparing 

