Week beginning 2nd June 2025
Part 2 of 2.
Research
ME/CFS research
Clinical and Translational Medicine
Extracellular vesicle proteomics uncovers energy metabolism, complement system, and endoplasmic reticulum stress response dysregulation postexercise in males with myalgic encephalomyelitis/chronic fatigue syndrome — Katherine A. Glass et al.
"Particularly prominent findings include the downregulation of protein sets including the TCA cycle and other metabolic pathways in ME/CFS patients 15 min postexercise, alongside the upregulation of complement system proteins." " Additionally, we found the dynamics during exercise recovery of 10 EV proteins involved in protein folding and the ER stress response were highly correlated with the severity of PEM in ME/CFS patients."
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Preprint: MedRxiv
Charting the Circulating Proteome in ME/CFS: Cross System Profiling and Mechanistic insights — August Hoel et al.
"Distinct patterns of tissue- and process-specific changes were seen. There was a broad increase in secreted proteins, while intracellular proteins, e.g. from skeletal muscle, particularly showed reduction. Immune cell-specific signatures indicated immune reprogramming, including a distinct reduction in neutrophil-associated proteins."
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International Journal of Molecular Sciences
Heat vs. Fatigue: Hyperthermia as a Possible Treatment Option for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) — Hochecker et al.
"From these results, we can conclude that the mitochondria of ME/CFS patients consume more oxygen at a basal level and for ATP production compared with healthy donors." "The lack of oxygen in ME/CFS patients could explain their higher baseline level of mitochondrial function compared with that of healthy individuals, as the cells are resupplied with sufficient oxygen during the assay conduction, and all accumulated electrons in the mitochondrial transport chain are utilised for ATP production in a short time."
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Preprint: BioRxiv
Indistinguishable mitochondrial phenotypes after exposure of healthy myoblasts to myalgic encephalomyelitis or control serum — Audrey A. Ryback et al.
"we performed a statistically well-powered replication study of the Seahorse Mitochondrial Stress test described by Fluge et al. (2016)." "We saw no difference in our primary outcome (difference in OCR at maximal respiratory capacity), nor in OCR and ECAR under any other of the conditions we measured."
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Preprint: Research Square
Low Dose Rapamycin Alleviates Clinical Symptoms of Fatigue and PEM in ME/CFS Patients via Improvement of Autophagy — Brian T. Ruan et al.
"the observed clinical improvement in fatigue was paralleled by molecular evidence of enhanced autophagy, including decreased pSer258-ATG13 and increased BECLIN-1 expression."
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Neuroprotection
How pandemics reshape our brain: Common links and targets between long-haul COVID-19, myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), oxidative stress, and neurodegeneration — Mary E. Herman
"This Research Highlight urges that, rather than sidelining ME/CFS from neurodegenerative research, there is a strong and immediate rationale for the establishment of a research biway; the wealth of learning from ongoing ME/CFS research might provide fodder for studies in neurobiology."
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Fatigue: Biomedicine, Health & Behavior
Mind in the mist: the interplay between fatigue, information processing and brain fog — Tarek A.-Z. K. Gaber
Editorial from a neuro-rehabilitationist perspective. "In this short paper we tried to highlight the strong and well established link between energy and information as understood by the laws of physics and subsequently, the potential for this link to shed light on the high prevalence of cognitive difficulties in patients suffering from chronic fatigue such as patients with ME/CFS, long Covid, multiple sclerosis, etc."
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Long Covid research
Frontiers in Immunology
Comprehensive transcriptome assessment in PBMCs of post-COVID patients at a median follow-up of 28 months after a mild COVID infection reveals upregulation of JAK/STAT signaling and a prolonged immune response — Fineschi et al.
"Among the most strongly upregulated protein-coding genes, we identified TCN1 (encoding Transcobalamin 1), LTF (encoding Lactotransferrin) and ANXA3 (encoding Annexin A3)." "Furthermore, we identified a strong enrichment of down-regulated genes in processes localized to the mitochondria."
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Biomedicines
Deoxygenation Trends and Their Multivariate Association with Self-Reported Fatigue in Post-COVID Syndrome — Ladek et al.
"The study aimed to investigate muscle (de)oxygenation during light and local exercise, assessed using NIRS, in patients with PCS compared to controls. In addition, a multivariate analysis was performed to explore the relationship between NIRS-derived oxygenation metrics and self-reported fatigue."
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Frontiers in Immunology
Distinct proteomic signatures in Ethiopians predict acute and long-term sequelae of COVID-19 — Wolday et al.
"Whereas upregulated levels of SLAMF1, TNF, TSLP, IL15RA, IL18, ADA, CXCL9, CXCL10, IL17C, and NT3 at the acute phase of the illness were associated with increased Long COVID risk, upregulated TRANCE was associated with a reduced risk of developing Long COVID."
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Frontiers in Immunology
IgA autoimmunity and coagulation among post-acute sequelae of SARS-CoV-2 infection (PASC) patients with persistent respiratory symptoms: a case-control study — Gomes et al.
"we found that IgA antibodies correlate inversely with clinical symptoms and directly with clotting parameters, suggesting a possible link between autoimmunity and coagulation, but in a unexpected direction as lower levels of IgA predicted more respiratory symptoms among PASC cases."
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Medicina
Long COVID and Biomarker Dysregulation—A Shift Toward Immune Exhaustion? — Kallaste et al.
"Our findings suggest that inflammation-related biomarker dysregulation following acute SARS-CoV-2 infection evolves dynamically over a six-month period. By the sixth month, compared to the third month, the presence of LC is more accurately predicted by a combination of persistent biomarker alteration and the severity of the initial infection, as defined by WHO criteria."
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Frontiers in Medicine
Perspective: host factors variants and the underlying causes of long COVID — Pasharawipas
"The concept of host factor variants, including variations in cellular molecules and major histocompatibility complex (MHC) polymorphisms, has been proposed to explain the variable symptoms in SARS-CoV-2-positive individuals. This article expands on this concept to explain the causes of long COVID, particularly focusing on the roles of cytotoxic T cells (Tc), helper T cells (Th), and antigen presenting cells (APCs)"
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ERJ Open Research
Characterising dysfunctional breathing seen in post-acute sequelae of SARS-CoV-2 using approximate entropy — Erin Eschbach et al.
"The purpose of this paper is to identify an objective metric to distinguish DB patterns from normal breathing patterns on CPET."
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Journal of Clinical Laboratory Analysis
Evaluation of Function and Biochemical Parameters of Platelet Concentrates (PCs) Prepared From Blood Donors With a History of COVID-19 During the Platelet Storage — Fatemeh Arastehnazar et al.
"findings suggest that COVID may induce specific alterations in platelet function during the early recovery period."
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Preprint: BioRxiv
The Role of SARS-CoV-2 Nucleocapsid Protein Persistence in Inducing Chronic Type I Interferon and Mitochondrial Dysfunction — Andreas Koenig et al.
"our findings suggest that the persistence of SARS-CoV-2 N-protein in peripheral blood promotes a chronic inflammatory milieu, even several months after active infection via MAVS-mediated type I IFN production that could contribute, in susceptible individuals, to the development of autoimmunity."
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Disability and Rehabilitation
“Rest recharges my energy”; experiences and perceptions of rest in adults with long-term conditions and fatigue in rehabilitation: a qualitative study — Martin Ackah et al.
"Lived-experience participants noted physical symptoms, while HCPs highlighted “all-or-nothing” thinking as a significant barrier."
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