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Illnesses of Unknown Etiology

Section Edited by Monica C. Panelli

This section aims to provide a translational medicine forum for the publication of research on illnesses, multisystem diseases and syndromes of unknown etiology. Examples of these include Myalgic Encephalomyelitis (ME)/Chronic Fatigue Syndrome (CFS) and Fibromyalgia Syndrome (FMS).

There has been a continuous albeit undervalued progress in this arena. However, among the many medical specialties that try to diagnose and treat the multiple symptoms presented by patients affected by these diseases, an avenue of rapid and simultaneous communication is missing.

Studies on all aspects of ME/CFS and multi-system diseases of unknown cause with applications in medicine and biotechnology will be considered for publication. The section welcomes contributions that employ traditional clinical, metabolic, epidemiologic, genomics and proteomics methods as diagnostic and prognostic tools.

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  1. Molecular chaperones assist protein folding, facilitate degradation of misfolded polypeptides, and thereby maintain protein homeostasis. Impaired chaperone activity leads to defective protein quality control t...

    Authors: Manar Elkenani, Amal Z. Barakat, Torsten Held, Daniel Marques Rodrigues, Sherok Mobarak, Surabhi Swarnka, Ibrahim M. Adham and Belal A. Mohamed
    Citation: Journal of Translational Medicine 2022 20:229
  2. Fatigue, exertion intolerance and post-exertional malaise are among the most frequent symptoms of Post-COVID Syndrome (PCS), with a subset of patients fulfilling criteria for Myalgic Encephalomyelitis/Chronic ...

    Authors: Milan Haffke, Helma Freitag, Gordon Rudolf, Martina Seifert, Wolfram Doehner, Nadja Scherbakov, Leif Hanitsch, Kirsten Wittke, Sandra Bauer, Frank Konietschke, Friedemann Paul, Judith Bellmann-Strobl, Claudia Kedor, Carmen Scheibenbogen and Franziska Sotzny
    Citation: Journal of Translational Medicine 2022 20:138
  3. Chronic fatigue syndrome (CFS) has been shown to be associated with infections. Tuberculosis (TB) is a highly prevalent infectious disease. Patients with chronic fatigue syndrome and post-tuberculosis experien...

    Authors: Tse-Yen Yang, Cheng-Li Lin, Wei-Cheng Yao, Chon-Fu Lio, Wen-Po Chiang, Kuan Lin, Chien-Feng Kuo and Shin-Yi Tsai
    Citation: Journal of Translational Medicine 2022 20:99
  4. Orthostatic intolerance-OI is common in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome-ME/CFS. We used a 10-min passive vertical lean test as orthostatic challenge-OC and measured changes in vitals and end...

    Authors: Benjamin H. Natelson, Jin-Mann S. Lin, Michelle Blate, Sarah Khan, Yang Chen and Elizabeth R. Unger
    Citation: Journal of Translational Medicine 2022 20:95
  5. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a serious disorder of unknown aetiology. While the pathomechanism of ME/CFS remains elusive, reduced natural killer (NK) cell cytotoxic function i...

    Authors: Natalie Eaton-Fitch, Stanley Du Preez, Hélène Cabanas, Katsuhiko Muraki, Donald Staines and Sonya Marshall-Gradisnik
    Citation: Journal of Translational Medicine 2022 20:94
  6. Nearly 250,000 veterans from the 1990–1991 Gulf War have Gulf War Illness (GWI), a condition with heterogeneous pathobiology that remains difficult to diagnose. As such, availability of blood biomarkers that r...

    Authors: Sarah Oberlin, Aurore Nkiliza, Megan Parks, James E. Evans, Nancy Klimas, Andrew P. Keegan, Kimberly Sullivan, Maxine H. Krengel, Michael Mullan, Fiona Crawford and Laila Abdullah
    Citation: Journal of Translational Medicine 2022 20:73
  7. Because of the absence of biological parameters for fatigue, appropriate instruments for assessing the degree of fatigue are important in the diagnosis and management of people complaining of fatigue-like symp...

    Authors: Eun-Jin Lim and Chang-Gue Son
    Citation: Journal of Translational Medicine 2022 20:8
  8. Duchenne muscular dystrophy (DMD) is an X-linked inherited disease caused by mutations in the gene encoding dystrophin that leads to a severe and ultimately life limiting muscle-wasting condition. Recombinant ...

    Authors: Anna Creisméas, Claire Gazaille, Audrey Bourdon, Marc-Antoine Lallemand, Virginie François, Marine Allais, Mireille Ledevin, Thibaut Larcher, Gilles Toumaniantz, Aude Lafoux, Corinne Huchet, Ignacio Anegon, Oumeya Adjali, Caroline Le Guiner and Bodvaël Fraysse
    Citation: Journal of Translational Medicine 2021 19:519
  9. Myasthenia gravis is a neuromuscular autoimmune disorder characterized by weakness and disability in the voluntary muscles. There have been several preliminary studies on the epidemiology of myasthenia gravis ...

    Authors: Nader Salari, Behnaz Fatahi, Yalda Bartina, Mohsen Kazeminia, Reza Fatahian, Payam Mohammadi, Shamarina Shohaimi and Masoud Mohammadi
    Citation: Journal of Translational Medicine 2021 19:516
  10. Chronic fatigue syndrome (CFS) is a long-term disabling illness accompanied by medically unexplained fatigue. This study aimed to explore the epidemiological characteristics of CFS in South Korea.

    Authors: Eun-Jin Lim, Jin-Seok Lee, Eun-Jung Lee, Seok-Ju Jeong, Ho-Young Park, Yo-Chan Ahn and Chang-Gue Son
    Citation: Journal of Translational Medicine 2021 19:502
  11. The maintained attention is the cause of great functional limitations in CFS/ME, a disease that mainly affects women in the central period of life. Cognitive function is explored using the Montreal Cognitive A...

    Authors: Iñigo Murga, Larraitz Aranburu, Pascual A. Gargiulo, Juan-Carlos Gómez-Esteban and José-Vicente Lafuente
    Citation: Journal of Translational Medicine 2021 19:494
  12. There is accumulating evidence of endothelial dysfunction, muscle and cerebral hypoperfusion in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS). In this paper we deduce the pathomechanisms resultin...

    Authors: Klaus J. Wirth, Carmen Scheibenbogen and Friedemann Paul
    Citation: Journal of Translational Medicine 2021 19:471

    The Correction to this article has been published in Journal of Translational Medicine 2022 20:25

    The Letter to the Editor to this article has been published in Journal of Translational Medicine 2022 20:40

  13. Long non-coding RNAs (lncRNAs), functioning as competing endogenous RNAs (ceRNAs), have been reported to play important roles in the pathogenesis of autoimmune diseases. However, little is known about the regu...

    Authors: Shuang Li, Xu Wang, Tianfeng Wang, Huixue Zhang, Xiaoyu Lu, Li Liu, Lifang Li, Chunrui Bo, Xiaotong Kong, Si Xu, Shangwei Ning, Jianjian Wang and Lihua Wang
    Citation: Journal of Translational Medicine 2021 19:468
  14. The length of time for clinical improvement of patients with thymomatous myasthenia gravis (MG) after extended thymectomy is not clear. The purpose of this study was to determine the length of time after thyme...

    Authors: Zhu Haoshuai, Zou Jianyong, Yang Lei, Zeng Bo, Jiefei Xiao, Xin Zhang, Zhenguang Chen and Su Chunhua
    Citation: Journal of Translational Medicine 2021 19:413
  15. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complex illness which disproportionally affects females. This illness is associated with immune and metabolic perturbations that may be influenc...

    Authors: Aurore Nkiliza, Megan Parks, Adam Cseresznye, Sarah Oberlin, James E. Evans, Teresa Darcey, Kristina Aenlle, Daniel Niedospial, Michael Mullan, Fiona Crawford, Nancy Klimas and Laila Abdullah
    Citation: Journal of Translational Medicine 2021 19:370
  16. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a serious multifactorial disorder. The origin remains ambiguous, however reduced natural killer (NK) cell cytotoxicity is a consistent immunologic...

    Authors: Natalie Eaton-Fitch, Hélène Cabanas, Stanley du Preez, Donald Staines and Sonya Marshall-Gradisnik
    Citation: Journal of Translational Medicine 2021 19:306
  17. An accurate prediction for prognosis can help in guiding the therapeutic options and optimizing the trial design for generalized myasthenia gravis (gMG). We aimed to develop and validate a predictive nomogram ...

    Authors: Rui Zhao, Ying Wang, Xiao Huan, Huahua Zhong, Zhirui Zhou, Jianying Xi, Yuwei Da, Lin Lei, Ting Chang, Zhe Ruan, Lijun Luo, Shengnan Li, Huan Yang, Yi Li, Sushan Luo and Chongbo Zhao
    Citation: Journal of Translational Medicine 2021 19:285
  18. Orthostatic intolerance (OI) is a frequent finding in individuals with myalgic encephalomyelitis /chronic fatigue syndrome (ME/CFS). Published studies have proposed that deconditioning is an important pathophy...

    Authors: C. (Linda) M. C. van Campen, Peter C. Rowe and Frans C. Visser
    Citation: Journal of Translational Medicine 2021 19:193
  19. Chronic Fatigue Syndrome or Myalgic Encephaloymelitis (ME/CFS) is a frequent debilitating disease with an enigmatic etiology. The finding of autoantibodies against ß2-adrenergic receptors (ß2AdR) prompted us t...

    Authors: Klaus J. Wirth and Carmen Scheibenbogen
    Citation: Journal of Translational Medicine 2021 19:162
  20. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a complex and debilitating disease accompanied by muscular fatigue and pain. A functional measure to assess muscle fatigability of ME/CFS patients...

    Authors: Bianka Jäkel, Claudia Kedor, Patricia Grabowski, Kirsten Wittke, Silvia Thiel, Nadja Scherbakov, Wolfram Doehner, Carmen Scheibenbogen and Helma Freitag
    Citation: Journal of Translational Medicine 2021 19:159
  21. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a debilitating illness, characterised by persistent fatigue that is unrelieved by rest, in combination with a range of other disabling symptoms. T...

    Authors: Rebekah Maksoud, Cassandra Balinas, Sean Holden, Hélène Cabanas, Donald Staines and Sonya Marshall-Gradisnik
    Citation: Journal of Translational Medicine 2021 19:81
  22. Authors: L. D. Crosby, S. Kalanidhi, A. Bonilla, A. Subramanian, J. S. Ballon and H. Bonilla
    Citation: Journal of Translational Medicine 2021 19:50

    The Correction to this article has been published in Journal of Translational Medicine 2021 19:217

  23. Chronic fatigue syndrome (CFS) is defined according to subjective symptoms only, and several conflicting case definition exist. Previous research has discovered certain biological alterations. The aim of the p...

    Authors: Tarjei Tørre Asprusten, Line Sletner and Vegard Bruun Bratholm Wyller
    Citation: Journal of Translational Medicine 2021 19:48
  24. Due to the inconsistent use of diagnostic criteria in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), it is unsure whether physiotherapeutic management regarded effective in ME/CFS is appropriate ...

    Authors: Marjon E. A. Wormgoor and Sanne C. Rodenburg
    Citation: Journal of Translational Medicine 2021 19:1
  25. Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) is understood as a complex condition, likely triggered and sustained by an interplay of biological, psychological, and social factors. Little oversig...

    Authors: Ashley Elizabeth Muller, Kari Tveito, Inger Johanne Bakken, Signe A. Flottorp, Siri Mjaaland and Lillebeth Larun
    Citation: Journal of Translational Medicine 2020 18:484
  26. Q fever fatigue syndrome (QFS) is characterised by a state of prolonged fatigue that is seen in 20% of acute Q fever infections and has major health-related consequences. The molecular mechanisms underlying QF...

    Authors: Ruud P. H. Raijmakers, Megan E. Roerink, Anne F. M. Jansen, Stephan P. Keijmel, Ranko Gacesa, Yang Li, Leo A. B. Joosten, Jos W. M. van der Meer, Mihai G. Netea, Chantal P. Bleeker-Rovers and Cheng-Jian Xu
    Citation: Journal of Translational Medicine 2020 18:448
  27. Approximately 2.5 million people in the U.S. suffer from myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). This disease negatively impacts patients’ ability to function, often resulting in difficult...

    Authors: Turner Palombo, Andrea Campos, Suzanne D. Vernon and Shad Roundy
    Citation: Journal of Translational Medicine 2020 18:423
  28. Marine lipids contain omega-3 fatty acids that can be metabolized into anti-inflammatory and pro-resolving mediators—namely 17-HDHA and 18-HEPE—which can serve as modulators of the pain experience. The purpose...

    Authors: Nini Callan, Doug Hanes and Ryan Bradley
    Citation: Journal of Translational Medicine 2020 18:401
  29. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a debilitating disease of unknown etiology lasting for a minimum of 6 months but usually for many years, with features including fatigue, cognitiv...

    Authors: Ludovic Giloteaux, Adam O’Neal, Jesús Castro-Marrero, Susan M. Levine and Maureen R. Hanson
    Citation: Journal of Translational Medicine 2020 18:387
  30. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a serious and complex physical illness that affects all body systems with a multiplicity of symptoms, but key hallmarks of the disease are pervasi...

    Authors: Eiren Sweetman, Torsten Kleffmann, Christina Edgar, Michel de Lange, Rosamund Vallings and Warren Tate
    Citation: Journal of Translational Medicine 2020 18:365
  31. Since the 1990s, neuroimaging has been utilised to study Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS), a debilitating illness with unknown aetiology. While brain abnormalities in ME/CFS have bee...

    Authors: Zack Y. Shan, Leighton R. Barnden, Richard A. Kwiatek, Sandeep Bhuta, Daniel F. Hermens and Jim Lagopoulos
    Citation: Journal of Translational Medicine 2020 18:335
  32. Lightheadedness, fatigue, weakness, heart palpitations, cognitive dysfunction, muscle pain, and exercise intolerance are some of the symptoms of orthostatic intolerance (OI). There is substantial comorbidity o...

    Authors: Jihyun Lee, Suzanne D. Vernon, Patricia Jeys, Weam Ali, Andrea Campos, Derya Unutmaz, Brayden Yellman and Lucinda Bateman
    Citation: Journal of Translational Medicine 2020 18:314
  33. Patients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) or Systemic Exertion Intolerance Disease (SEID) present with a constellation of symptoms including debilitating fatigue that is unrelie...

    Authors: Sean Holden, Rebekah Maksoud, Natalie Eaton-Fitch, Hélène Cabanas, Donald Staines and Sonya Marshall-Gradisnik
    Citation: Journal of Translational Medicine 2020 18:290

    The Correction to this article has been published in Journal of Translational Medicine 2020 18:407

  34. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a debilitating disease with unknown causes. From the perspectives on the etiology and pathophysiology, ME/CFS has been labeled differently, which ...

    Authors: Eun-Jin Lim and Chang-Gue Son
    Citation: Journal of Translational Medicine 2020 18:289

    The Letter to the Editor to this article has been published in Journal of Translational Medicine 2020 18:447

  35. Post-exertional malaise (PEM), the cardinal feature of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), occurs generally after exposure to a stressor. It is characterized by the worsening of ME/CFS...

    Authors: Alaa Ghali, Paul Richa, Carole Lacout, Aline Gury, Anne-Berengere Beucher, Chadi Homedan, Christian Lavigne and Geoffrey Urbanski
    Citation: Journal of Translational Medicine 2020 18:246
  36. Most studies to assess effort intolerance in patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) have used questionnaires. Few studies have compared questionnaires with objective measures...

    Authors: C. M. C. van Campen, Peter C. Rowe, Freek W. A. Verheugt and Frans C. Visser
    Citation: Journal of Translational Medicine 2020 18:228
  37. Chronic Fatigue Syndrome/Myalgic Encephalomyelitis/Systemic Exertion Intolerance Disease (CFS/ME/SEID) is a complex illness that has an unknown aetiology. It has been proposed that metabolomics may contribute ...

    Authors: Teilah Kathryn Huth, Natalie Eaton-Fitch, Donald Staines and Sonya Marshall-Gradisnik
    Citation: Journal of Translational Medicine 2020 18:198
  38. In myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), altered membrane excitability often occurs in exercising muscles demonstrating muscle dysfunction regardless of any psychiatric disorder. Increas...

    Authors: Yves Jammes, Nabil Adjriou, Nathalie Kipson, Christine Criado, Caroline Charpin, Stanislas Rebaudet, Chloé Stavris, Régis Guieu, Emmanuel Fenouillet and Frédérique Retornaz
    Citation: Journal of Translational Medicine 2020 18:173
  39. Monocytes and toll-like receptors (TLR) have been found in the inflammatory infiltrate of muscle biopsies in patients with idiopathic inflammatory myopathies (IIM), suggesting an important role of these cells ...

    Authors: Jiram Torres-Ruiz, Daniel Alberto Carrillo-Vazquez, Diana Marcela Padilla-Ortiz, Ricardo Vazquez-Rodriguez, Carlos Nuñez-Alvarez, Guillermo Juarez-Vega and Diana Gomez-Martin
    Citation: Journal of Translational Medicine 2020 18:125
  40. Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) has been emerging as a significant health issue worldwide. This study aimed to systemically assess the prevalence of CFS/ME in various aspects of analys...

    Authors: Eun-Jin Lim, Yo-Chan Ahn, Eun-Su Jang, Si-Woo Lee, Su-Hwa Lee and Chang-Gue Son
    Citation: Journal of Translational Medicine 2020 18:100
  41. Although medical requirements are urgent, no effective intervention has been proven for chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME). To facilitate the development of new therapeutics, we system...

    Authors: Do-Young Kim, Jin-Seok Lee, Samuel-Young Park, Soo-Jin Kim and Chang-Gue Son
    Citation: Journal of Translational Medicine 2020 18:7

    The Correction to this article has been published in Journal of Translational Medicine 2020 18:492

  42. Heart rate variability (HRV) is an objective, non-invasive tool to assessing autonomic dysfunction in chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME). People with CFS/ME tend to have lower HRV; how...

    Authors: Rosa María Escorihuela, Lluís Capdevila, Juan Ramos Castro, María Cleofé Zaragozà, Sara Maurel, José Alegre and Jesús Castro-Marrero
    Citation: Journal of Translational Medicine 2020 18:4
  43. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a debilitating condition characterised by fatigue and post-exertional malaise. Its pathogenesis is poorly understood. GDF15 is a circulating prote...

    Authors: A. Melvin, E. Lacerda, H. M. Dockrell, S. O’Rahilly and L. Nacul
    Citation: Journal of Translational Medicine 2019 17:409
  44. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is hallmarked by a significant reduction in natural killer (NK) cell cytotoxicity, a mechanism tightly regulated by calcium (Ca2+). Interestingly, inter...

    Authors: Cassandra Balinas, Helene Cabanas, Donald Staines and Sonya Marshall-Gradisnik
    Citation: Journal of Translational Medicine 2019 17:401
  45. Immunoglobulin A nephropathy (IgAN) is the leading cause of end-stage kidney disease. Previous mRNA microarray profiling studies of IgAN revealed inconsistent data. We sought to identify the aberrantly express...

    Authors: Youxia Liu, Xiangchun Liu, Junya Jia, Jie Zheng and Tiekun Yan
    Citation: Journal of Translational Medicine 2019 17:320
  46. Chronic fatigue syndrome (CFS) is a heterogeneous disorder with uncertain pathogenesis. Without effective therapy, CFS is characterized by disabling fatigue, depression, memory loss, and somatic discomfort. Th...

    Authors: Tiansong Yang, Yan Yang, Delong Wang, Chaoran Li, Yuanyuan Qu, Jing Guo, Tianyu Shi, Wang Bo, Zhongren Sun and Tetsuya Asakawa
    Citation: Journal of Translational Medicine 2019 17:213

Previously published in Journal of Translational Medicine

Myalgic Encephalomyelitis (ME)/Chronic Fatigue Syndrome (CFS) articles