Factors impacting the illness trajectory of post-infectious fatigue syndrome (PIFS)

Research abstract:

Factors impacting the illness trajectory of post-infectious fatigue syndrome: a qualitative study of adults’ experiences, by Eva Stormorken, Leonard A. Jason and Marit Kirkevold in BMC Public Health [Published: 13 December 2017]

Background:
Post-infectious fatigue syndrome (PIFS), also known as post-viral fatigue syndrome, is a complex condition resulting in physical, cognitive, emotional, neurological, vocational and/or role performance disabilities in varying degrees that changes over time. The needs for health care resources are high, and costly, as is the economic burden on the affected individuals. Many factors may impact the trajectory, and frequently PIFS develops into a chronic condition.

Health professionals lack understanding and knowledge, which results in delayed diagnosis, lack of recognition, appropriate treatment, support and practical help. The aim of our study was to explore, from the perspective of persons who had lived with PIFS for four years following an outbreak of Giardia l. induced enteritis, factors that may have impacted their illness trajectory and how these factors had played a role during different phases.

Methods:
In this retrospective exploratory qualitative study a group of 26 affected adults between 26 and 59 years old were selected for in-depth interviews. A maximum variation sample was recruited from a physician-diagnosed cohort of persons with PIFS enrolled at a tertiary outpatient fatigue clinic. The interviews were audio-recorded, transcribed verbatim and subjected to qualitative content analysis.

Results:
Unhelpful and helpful factors were associated with the healthcare system, health professionals and the affected persons were experienced as having an impact on the trajectory. External impacting factors which are related to the health care system, providers and the social security system are misdiagnosis, trivialization of symptoms, unhelpful advice, delayed diagnosis and lack of appropriate help. Internal impacting factors related to the affected individuals were lack of knowledge, overestimating functional capacity, assuming the condition will pass, ignoring body signals and denial. A model of impacting factors in each phase of the trajectory is presented.

Conclusion:
Unmet needs may result in unnecessary disability and high societal and personal costs. Enhanced knowledge of impacting factors in each phase of the trajectory may contribute to more timely and tailored health care services and less use of health services. Increased functional capacity, improved health and ability to work or study may reduce the societal costs and the economic burden for the affected individuals.

Posted in News | Tagged , , , , , , , | Comments Off on Factors impacting the illness trajectory of post-infectious fatigue syndrome (PIFS)

Could ME/CFS be a chronic form of sepsis?

Simmaron Research blog post, by Cort Johnson, 1 January 2018: Could Chronic Fatigue Syndrome (ME/CFS) Be a Chronic Form of Sepsis?

“In this monograph I would like to explore the concept of neuro-immune fatigue as a metabolic illness resulting from a series of events beginning with an infection, toxic exposure or neurologic injury.” Dr. David Bell, 2007

 

This is one of a series of blogs highlighting hypotheses mostly written by doctors or other professionals with ME/CFS, or in this case, doctors who have cared for them. The hypothesis examined in this case: Dr. Bell’s idea, produced in his monograph, “Cellular Hypoxia and Neuro-immune Fatigue”, that chronic fatigue syndrome (ME/CFS) could be a kind of “slow sepsis”.

Bell’s “Cellular Hypoxia” book was published in 2007, long before he was probably acquainted with Dr. Naviaux’s and others’ work and before the recent explosion of interest in cellular energy production in ME/CFS. Naviaux and others would probably smile, though, at Bell’s prediction that with ME/CFS and other diseases, “we may be witnessing the emergence of the next era of medicine: the diagnosis and treatment of cellular metabolic diseases”.

Sepsis is a life-threatening response to infection or trauma that can lead to tissue damage, organ failure, and death. In some ways, sepsis sounds similar to autoimmunity. For reasons the medical profession does not understand, sepsis begins when the immune system resets itself, stops fighting pathogens, and turns on the body.

The results are often devastating. The near complete body breakdown that results makes sepsis the most expensive disease hospitals treat.  Forty percent of patients with severe sepsis do not survive.

Chronic Fatigue Syndrome (ME/CFS) – A Mild but Chronic State of Septic Shock?

ME/CFS is obviously not sepsis, but it does share some interesting characteristics.  With his “cellular hypoxia” monograph published in 2007, Dr. David Bell suggested that people with ME/CFS may exist in a “mild, but chronic state of septic shock”. Bell came to this conclusion after finding that sepsis and ME/CFS produces what he believed is a similar kind of oxygen dysfunction. In sepsis and in ME/CFS, Dr. Bell notes that oxygen is actually abundant: it’s abundant in the air, the lungs and the blood of ME/CFS patients, but it’s just not getting taken up by the tissues.

Bell reports that in septic shock, the following events occur (note the last one):

  • a serious infection occurs which –
  • results in the production of cytokines which –
  • increases nitric oxide levels which then –
  • interfere with the production of cellular energy.

Bell noted that when nitric oxide blocks the flow of oxygen in severe septic shock, a patient can still die despite doctors giving him/her as much blood and oxygen as they need.

Bell suggests a similar process to sepsis occurs more gradually in ME/CFS. First, an initiating infection or toxic exposure triggers the immune system to produce pro-inflammatory cytokines and nitric oxide (NO). From there, NO increases peroxynitrite and superoxide (Martin Pall’s hypothesis), which causes oxidative stress and interferes with mitochondrial function.

Ultimately, the cell becomes hypoxic (oxygen-starved), and neuropathies and autoimmune and other problems develop.

The idea that impaired oxygen intake might be limiting energy production has gained some currency since Bell wrote his monograph.  Vermoulen’s exercise studies suggest that impaired oxygen intake, not mitochondrial problems, is the key issue in energy generation. The early stages of Ron Davis’s collaboration with an San Jose State University bio-engineer suggest that the red blood cells may have difficulty getting to the tissues. Other researchers have found autoantibodies to receptors that open and close the blood vessels in a subset of ME/CFS patients.

Last year, Chris Armstrong in, The “Starvation” Disease? Metabolomics Meets Chronic Fatigue Syndrome Down Under“, took the sepsis/ME/CFS notion one step further when he noted that many of the metabolomic anomalies (reduced amino acids, reduced lipids and increased glucose levels) found in ME/CFS are also found in sepsis and starvation.

Remarking that during sepsis, immune cells rely entirely on glycolysis to proliferate, Armstrong speculated, much as Bell did years earlier, that an infection or autoimmune process might have triggered a sepsis-like condition which lead to a state of chronic metabolic starvation.

A last tie to sepsis is an incidental one.  Ron Davis and Ron Tompkins of the Open Medicine Foundation worked on sepsis together. Based on his work there, Davis has said ME/CFS could be a kind of atypical sepsis.

Read more

Posted in News | Tagged , , , , , , | Comments Off on Could ME/CFS be a chronic form of sepsis?

Could you create a database for WAMES?

WAMES needs a relational database

We are urgently looking for a volunteer to create a database using Microsoft Access.

This database would enable us to monitor the work of WAMES and extract data to support funding applications.

The WAMES team has a clear plan for the database and will be able to input and manipulate the data once the database is set up. You would work from home with contact and information from the chair Jan Russell

For more information email jan@wames.org.uk

Posted in News | Tagged , , | Comments Off on Could you create a database for WAMES?

Eukaryotes in the gut microbiota in ME/CFS

Research abstract:

Eukaryotes in the gut microbiota in myalgic encephalomyelitis/chronic fatigue syndrome, by Alexandra H. Mandarano, Ludovic Giloteaux, Betsy A. Keller, Susan M. Levine, Maureen R. Hanson in  PeerJ 6:e4282 [January 22, 2018]

Patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) often suffer from gastrointestinal symptoms and many are diagnosed with irritable bowel syndrome (IBS).

Previous studies, including from our laboratory, have demonstrated that the ME/CFS gut bacterial composition is altered and less diverse when compared to healthy individuals. Patients have increased biomarkers of inflammation and leaky gut syndrome.

To further investigate dysbiosis in the ME/CFS gut microbiome, we sought to characterize the eukaryotes present in the gut of 49 individuals with ME/CFS and 39 healthy controls.

Using 18S rRNA sequencing, we have identified eukaryotes in stool samples of 17 healthy individuals and 17 ME/CFS patients. Our analysis demonstrates a small, nonsignificant decrease in eukaryotic diversity in ME/CFS patients compared to healthy individuals.

In addition, ME/CFS patients show a nonsignificant increase in the ratio of fungal phyla Basidiomycota to Ascomycota, which is consistent with ongoing inflammation in ME/CFS. We did not identify specific eukaryotic taxa that are associated with ME/CFS disease status.

Posted in News | Tagged , , , , , , , , , , , | Comments Off on Eukaryotes in the gut microbiota in ME/CFS

Elevations of ventricular lactate levels occur in both CFS & FM

Research abstract:

Elevations of Ventricular Lactate Levels Occur in Both Chronic Fatigue Syndrome and Fibromyalgia, by Benjamin H. Natelson, Diana Vu, Jeremy D. Coplan, Xiangling Mao, Michelle Blate, Guoxin Kang, Eli Soto, Tolga Kapusuz & Dikoma C. Shungu in Fatigue 2017; 5(1):15-20. [Epub 2017 Feb 20]

Background:

Chronic fatigue syndrome (CFS) and fibromyalgia (FM) frequently have overlapping symptoms, leading to the suggestion that the same disease processes may underpin the two disorders – the unitary hypothesis. However, studies investigating the two disorders have reported substantial clinical and/or biological differences between them, suggesting distinct pathophysiological underpinnings.

Purpose:

The purpose of this study was to further add to the body of evidence favoring different disease processes in CFS and FM by comparing ventricular cerebrospinal fluid lactate levels among patients with CFS alone, FM alone, overlapping CFS and FM symptoms, and healthy control subjects.

Methods:

Ventricular lactate was assessed in vivo with proton magnetic resonance spectroscopic imaging (1H MRSI) with the results normed across the 2 studies in which the data were collected.

Results:

Mean CSF lactate levels in CFS, FM and CFS+FM did not differ among the three groups, but were all significantly higher than the mean values for control subjects.

Conclusion:

While patients with CFS, FM and comorbid CFS and FM can be differentiated from healthy subjects based on measures of CFS lactate, this neuroimaging outcome measure is not a viable biomarker for differentiating CFS from FM or from patients in whom symptoms of the two disorders overlap.

Solve ME/CFS blog post, 23 January 2018:  Elevations of ventricular lactate levels occur in both chronic fatigue syndrome and fibromyalgia

CFS and FM were found to have statistically indistinguishable levels of lactate in the recent finding detailed in Fatigue, but we don’t have proof this reflects the same underlying cause. Nonetheless, ventricular lactate is indicated as a viable biomarker of underlying brain dysfunction for some patients with either or both diagnoses. The authors note that further research will be needed to further address if CFS and FM are different illnesses or variations of the same condition.

Posted in News | Tagged , , , , , , , | Comments Off on Elevations of ventricular lactate levels occur in both CFS & FM

Longitudinal associations of lymphocyte subsets with clinical outcomes in CFS

Research abstract:

Longitudinal associations of lymphocyte subsets with clinical outcomes in chronic fatigue syndrome, by  Melissa L. Mehalick, Karen B. Schmaling , Daniel E. Sabath, & Dedra S. Buchwald in Fatigue: Biomedicine, Health & Behavior 2018 pp 1-12  [Published online: 12 Jan 2018]

Background:

Chronic fatigue syndrome (CFS) is characterized by prolonged fatigue and other physical and neurocognitive symptoms. Some studies suggest that CFS is accompanied by disruptions in the number and function of various lymphocytes. However, it is not clear which lymphocytes might influence CFS symptoms.

Purpose:

To determine if patient reported fatigue symptoms and physical functioning scores significantly changed across time with lymphocyte counts as evidence of a relation among chronic fatigue symptoms and the immune response.

Methods:

The current longitudinal, naturalistic study assessed the cellular expression of three lymphocyte subtypes – natural killer (NK) cells (CD3 − CD16+ and CD3 − CD56+) and naïve T cells (CD4 + CD45RA+) – to determine whether changes in lymphocytes at 4 time points across 18 months were associated with clinical outcomes, including CFS symptoms, physical functioning, and vitality, among patients with chronic fatigue. Latent growth curve models were used to examine the longitudinal relationship between lymphocytes and clinical outcomes.

Results:

Ninety-three patients with Fukuda-based CFS and seven with non-CFS fatigue provided study data. Results indicated that higher proportions of naïve T cells and lower proportions of NK cells were associated with worse physical functioning, whereas higher proportions of NK cells (CD3 − CD16+) and lower proportions of naïve T cells were associated with fewer CFS symptoms.

Conclusion:

These findings suggest that lymphocytes are modestly related to clinical outcomes over time.

Posted in News | Tagged , , , , , , , | Comments Off on Longitudinal associations of lymphocyte subsets with clinical outcomes in CFS

Genome-epigenome interactions associated with ME/CFS

Research abstract:

Genome-Epigenome Interactions Associated with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, by Santiago Herrera, Wilfred C de Vega, David Ashbrook, Suzanne D Vernon, Patrick O McGowan in Biorxiv [preprint 22 Dec 2017]

Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is an example of a complex disease of unknown etiology.

Multiple studies point to disruptions in immune functioning in ME/CFS patients as well as with specific genetic polymorphisms and alterations of the DNA methylome in lymphocytes. However, the association between DNA methylation and genetic background in relation to the ME/CFS is currently unknown.

In this study we explored this association by characterizing the genomic (~4.3 million SNPs) and epigenomic (~480 thousand CpG loci) variability between populations of ME/CFS patients and healthy controls.

We found significant associations of methylation states in T-lymphocytes at several CpG loci and regions with ME/CFS phenotype. These methylation anomalies are in close proximity to genes involved with immune function and cellular metabolism. Finally, we found significant correlations of genotypes with methylation phenotypes associated with ME/CFS.

The findings from this study highlight the role of epigenetic and genetic interactions in complex diseases, and suggest several genetic and epigenetic elements potentially involved in the mechanisms of disease in ME/CFS

Conclusions
We identified over one hundred differentially methylated CpG loci associated with ME/CFS in T lymphocytes. Approximately half of these were clustered in differentially methylated regions of 500bp in size or less. Our data and analyses suggest that there is an indirect role of genotype influencing DNA methylation patterns associated with ME/CFS. We found no substantial large-effect direct associations of specific genotypes with ME/CFS disease phenotype. Larger scale genome wide association studies are necessary to test for potential small-effect associations between genotype and ME/CFS phenotype.

All of the methylation values at differentially methylated loci in T lymphocytes had significant correlations with specific genotypes at neighboring SNPs (within a window of 1 Mbp), indicating that particular genetic backgrounds may influence methylation levels differently in ME/CFS patients than in controls. The genomic elements associated with genetic and epigenetic variants characteristic of ME/CFS patients in this study constitute targets for future research. Understanding the molecular mechanisms of genetic-epigenetic interactions of these targets will be key to develop new treatments for ME/CFS, and can serve as a model to understand the molecular basis of related complex diseases.

Posted in News | Tagged , , , , , , , | Comments Off on Genome-epigenome interactions associated with ME/CFS

Vision in ME – restricted spatial windows of visibility

Research abstract:

Restricted spatial windows of visibility in Myalgic Encephalomyelitis (ME), by Nadia S Ahmed, Irene Gottlob, Frank A Proudlock and Claire V Hutchinson in Vision 2018, 2(1), 2; doi:10.3390/vision2010002 [Published: 17 January 2018]

Myalgic encephalomyelitis (ME) is a devastating disorder marked by debilitating fatigue. It not well understood and its diagnosis is controversial. It is very important therefore that significant clinical features are investigated.

Visual symptoms in ME represent a group of distinct, quantifiable, clinical features that could significantly improve diagnosis and provide insights into underlying pathology. The purpose of the present study was therefore to explore the effect of ME on spatial windows of visibility using the spatial contrast sensitivity function.

Contrast sensitivity was determined for stationary luminance-defined sinusoidal gratings spanning a five-octave range of spatial frequencies (0.5 to 16 c/deg) in a group of 19 individuals with ME and a group of 19 matched (age, gender) controls. Compared to controls, the ME group exhibited a restricted spatial window of visibility for encoding stimulus contrast. This was characterised principally by a contrast sensitivity deficit at lower spatial frequencies and a narrower bandwidth.

Our findings suggest that contrast sensitivity deficits may represent a visual marker of ME, and be indicative of abnormal visual processing at the level of the retina and in the cortical and subcortical visual pathways.

More about spatial vision

 

 

Posted in News | Tagged , , , , , , , | Comments Off on Vision in ME – restricted spatial windows of visibility

UK ME CFS Biobank Q&A

Science for ME blogpost, 14 Dec 2017: UK ME/CFS Biobank Ask Me Anything thread

UK ME/CFS Biobank team:

  • Project Lead & Clinical Lecturer, Dr Eliana Lacerda,
  • Co-Principal Investigator Dr Luis Nacul,
  • Research Nurse & Biobank Coordinator Caroline Kingdon
  • Project Manager (Administrative & Financial) Jack Butterworth

 

To read about the vital work they do, visit CureME: leading research into ME/CFS

Posted in News | Tagged , | Comments Off on UK ME CFS Biobank Q&A

Cortical connectivity in CFS and neurocognitive impairment

Research abstract:

Small-world network analysis of cortical connectivity in Chronic Fatigue Syndrome using quantitative EEG, by Mark A Zinn, Marcie L Zinn, Leonard A Jason in NeuroRegulation, 4(3–4), 125–137, Dec 2017

The aim of this study was to explore the relationship between complex brain networks in people with Chronic Fatigue Syndrome (CFS) and neurocognitive impairment.

Quantitative EEG (qEEG) recordings were taken from 14 people with CFS and 15 healthy controls (HCs) during an eye-closed resting condition. Exact low resolution electromagnetic tomography (eLORETA) was used to estimate cortical sources and perform a functional connectivity analysis.

The graph theory approach was used to characterize network representations for each participant and derive the “small-worldness” index, a measure of the overall homeostatic balance between local and long-distance connectedness.

Results showed that small-worldness for the delta band was significantly lower for patients with CFS compared to HCs. In addition, delta small-worldness was negatively associated with neurocognitive impairment scores on the DePaul Symptom Questionnaire (DSQ). Finally, delta small-worldness indicated a greater risk of complex brain network inefficiency for the CFS group.

These results suggest that CFS pathology may be functionally disruptive to small-world networks. In turn, small-world characteristics might serve as a neurophysiological indicator for confirming a biological basis of cognitive symptoms, treatment outcome, and neurophysiological status of people with CFS.

 

Posted in News | Tagged , , , , , , , , , | Comments Off on Cortical connectivity in CFS and neurocognitive impairment