Evidence browser

Role of antioxidants in chronic fatigue syndrome in mice.

Singh, Amanpreet, Garg, Vivek, Gupta, Saraswati et al.·Indian journal of experimental biology·2002

This mouse study tested whether antioxidants—substances that protect cells from damage—might help with fatigue and despair-like behaviors. Researchers gave mice different treatments including antioxidant drugs (carvedilol and melatonin) and herbal products (St. John's Wort and GS-02), and found that these treatments reduced despair-like behavior and restored protective chemicals in the brain that were depleted by stress.

A computational analysis of Canale-Smith syndrome: chronic lymphadenopathy simulating malignant lymphoma.

Krueger, Gerhard R F, Brandt, Michael E, Wang, Guanyu et al.·Anticancer research·2002

Researchers used a computer model to simulate how the immune system changes when infected with a virus called HHV-6. They found that a chronic (long-lasting) simulated infection produced immune cell patterns similar to what is seen in ME/CFS patients, suggesting that persistent viral infection might be connected to the disease.

E3 PreliminaryBehavioralPEM not requiredCase-Control

[Symptom or illness? The exhausting life of an adolescent with chronic fatigue syndrome].

Di Gallo, A·Zeitschrift fur Kinder- und Jugendpsychiatrie und Psychotherapie·2002

This study describes the medical experience of a teenage boy diagnosed with chronic fatigue syndrome (CFS). The doctors examined questions about what causes CFS, how it develops, how to diagnose it, and what treatments might help. The case provides a detailed look at one patient's journey with this complex illness.

Diagnostics

E3 PreliminaryDiagnosticPEM unclearMethods-Paper

Biorhythms and possible central regulation of magnesium status, phototherapy, darkness therapy and chronopathological forms of magnesium depletion.

Durlach, Jean, Pagès, Nicole, Bac, Pierre et al.·Magnesium research·2002

This paper proposes that magnesium deficiency may be linked to disrupted circadian rhythms (biological clocks) and could contribute to several conditions including ME/CFS, fibromyalgia, and sleep problems. The authors suggest that light therapy, dark therapy, and magnesium supplementation may help by affecting the body's internal clock and natural sleep hormone production.

Sleep

Generation of classification criteria for chronic fatigue syndrome using an artificial neural network and traditional criteria set.

Linder, R, Dinser, R, Wagner, M et al.·In vivo (Athens, Greece)·2002

Researchers tested whether a computer program called an artificial neural network could help doctors better identify ME/CFS by looking at patient symptoms and comparing them to two other conditions that also cause fatigue: lupus and fibromyalgia. The computer program was very accurate—correctly identifying ME/CFS about 95% of the time—and worked better than traditional statistical methods for creating diagnostic rules.

Diagnostics

E3 PreliminaryCohortPEM unclearCross-Sectional

Quality of life issues in patients with essential thrombocythemia and polycythemia vera.

Hoffman, Ronald·Seminars in oncology·2002

This article discusses how doctors should measure quality of life in patients with two rare blood disorders (essential thrombocythemia and polycythemia vera). The author explains that while treatments can control blood cell production and prevent some serious complications, they often cause side effects. The article suggests that doctors should use quality-of-life questionnaires to better understand whether treatments are truly helping patients feel better overall.

Women's experiences of stigma in relation to chronic fatigue syndrome and fibromyalgia.

Asbring, Pia, Närvänen, Anna-Liisa·Qualitative health research·2002

This study interviewed 25 women with ME/CFS or fibromyalgia about their experiences with stigma—being doubted, judged, or not taken seriously. Women reported that stigma was most common before they received a diagnosis, and that having many different symptoms made it harder for others to believe they were truly ill. People sometimes questioned whether the illnesses were real or blamed them on emotional problems rather than physical causes.

Diagnostics

E3 PreliminaryCohortPEM unclearCase-Control

Peripheral blood mononuclear cell beta-endorphin concentration is decreased in chronic fatigue syndrome and fibromyalgia but not in depression: preliminary report.

Panerai, Alberto E, Vecchiet, Jacopo, Panzeri, Paolo et al.·The Clinical journal of pain·2002

This study measured a natural pain-relieving substance called beta-endorphin in immune cells from people with ME/CFS, fibromyalgia, depression, and healthy controls. The researchers found that people with ME/CFS and fibromyalgia had significantly lower levels of beta-endorphin than healthy people and those with depression. This suggests the immune systems of people with ME/CFS and fibromyalgia may be working differently than in other conditions.

Ribonuclease L proteolysis in peripheral blood mononuclear cells of chronic fatigue syndrome patients.

Demettre, Edith, Bastide, Lionel, D'Haese, Anne et al.·The Journal of biological chemistry·2002

Researchers found that immune cells from ME/CFS patients show abnormally high breakdown of a protein called RNase L, which normally helps fight viral infections. Instead of remaining whole, this protein is being cut into smaller pieces (37 kDa and 30 kDa fragments), yet these fragments can still work together to fight infections. This abnormal protein breakdown pattern could potentially be used as a marker to help diagnose ME/CFS.

E3 PreliminaryMechanismPEM not requiredCase-Control

Using an interleukin-6 challenge to evaluate neuropsychological performance in chronic fatigue syndrome.

Arnold, M C, Papanicolaou, D A, O'Grady, J A et al.·Psychological medicine·2002

Researchers gave ME/CFS patients and healthy people a substance called interleukin-6 to temporarily trigger flu-like symptoms. They then tested how well both groups could think and remember during this induced illness. ME/CFS patients reported more overall sickness symptoms, but surprisingly, both groups performed equally well on memory and thinking tests, suggesting that the temporary immune activation didn't impair cognitive abilities in either group.

E3 PreliminaryBehavioralPEM not requiredCross-Sectional

[On the history of the concept neurasthenia and its modern variants chronic-fatigue-syndrome, fibromyalgia and multiple chemical sensitivities].

Schäfer, M L·Fortschritte der Neurologie-Psychiatrie·2002

This article traces the history of a medical term called 'neurasthenia' that was used in the 1800s to describe people with severe tiredness and weakness. The author explains how this old concept disappeared from Western medicine but has reappeared in modern times under new names like Chronic Fatigue Syndrome, fibromyalgia, and multiple chemical sensitivities. The article suggests that cultural and social factors influence how these illnesses are recognized and named in different parts of the world.

Characteristics of patients with persistent severe disability and medically unexplained neurological symptoms: a pilot study.

Allanson, J, Bass, C, Wade, D T·Journal of neurology, neurosurgery, and psychiatry·2002

This study looked at 25 patients with severe disability and neurological symptoms that doctors couldn't explain with standard tests. Most patients were in wheelchairs and very limited in daily activities, though they had been given different diagnoses—some psychiatric, some neurological. The researchers found that many of these patients had experienced trauma, had received psychiatric treatment, or had switched from self-harm to physical disability around the same time.

E3 PreliminaryReviewPEM not requiredReview-Narrative

The intelligent body and its discontents.

Hyland, Michael E·Journal of health psychology·2002

This paper proposes that the whole body—not just the brain—can learn and process information like a complex computer system. When this body-wide system malfunctions, it can create widespread health problems distributed throughout the body rather than in one location. The authors suggest ME/CFS is an example of this type of whole-body dysfunction and may require different treatment approaches than traditional medicine typically offers.

Structural and functional features of the 37-kDa 2-5A-dependent RNase L in chronic fatigue syndrome.

Shetzline, Susan E, Martinand-Mari, Camille, Reichenbach, Nancy L et al.·Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research·2002

Researchers found that ME/CFS patients have a smaller, altered form of a protein called RNase L in their immune cells compared to healthy people. This smaller protein (37-kDa) appears to work similarly to the normal-sized protein (80-kDa) in healthy controls, particularly in how it binds to immune signaling molecules. This discovery suggests that ME/CFS may involve a structural change in this immune system protein.

E3 PreliminaryCommentaryPEM not requiredEditorial

Somatization, sensitization, and functional dyspepsia.

Wilhelmsen, Ingvard·Scandinavian journal of psychology·2002

This study explores why people with conditions like ME/CFS, fibromyalgia, and functional dyspepsia experience overlapping symptoms such as fatigue, headaches, muscle pain, and sleep problems. The researchers suggest these different conditions may share a common underlying process where the nervous system becomes overly sensitive to pain and discomfort signals, leading the body to experience and report multiple symptoms across different areas.

Pain and Sensitization

E3 PreliminaryBehavioralPEM not requiredCross-Sectional

The role of fear of physical movement and activity in chronic fatigue syndrome.

Silver, A, Haeney, M, Vijayadurai, P et al.·Journal of psychosomatic research·2002

This study looked at whether fear of movement and activity contributes to people with ME/CFS avoiding exercise. Researchers created a questionnaire to measure this fear and asked patients to ride an exercise bike as long as they could. They found that people's beliefs about whether activity was dangerous predicted how much they exercised, even when other factors like tiredness and heart rate did not.

E3 PreliminaryMechanismPEM not requiredCross-Sectional

Hypothalamic-pituitary-adrenal axis reactivity in chronic fatigue syndrome and health under psychological, physiological, and pharmacological stimulation.

Gaab, Jens, Hüster, Dominik, Peisen, Renate et al.·Psychosomatic medicine·2002

This study looked at how the stress-response system (a hormone system in the brain called the HPA axis) works in ME/CFS patients compared to healthy people. Researchers exposed both groups to different types of stress—mental stress, exercise, and a hormone test—and measured how their bodies responded. ME/CFS patients showed lower levels of a stress hormone called ACTH at baseline and during stress tests, but their cortisol levels were mostly normal, suggesting their stress system works differently rather than being broken.

Post-Exertional Malaise