aquariusgirl
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Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of, and finding treatments for, complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia, long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.
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Note the difference in the upper ranges of the CFS patients verses the controls. They are very substantial. The range of LPS plasma levels in CFS patients was 34.32-279.30 The range of LPS plasma levels of the control group was 32.21-187.32
Wow, I always thought you'd read everything. Just google Hanson, she's only published a couple of articles on ME.
You may want to have a look at this study, but if you start digging on Pubmed, you'll find other studies claiming increases in serum LPS.
increase in TJ permeability leads to the translocation of lipopolysaccharide (LPS) into the blood circulation, where it attaches to lymphocyte TLR4, and CD14 receptors, triggering the release of pro-inflammatory cytokines such as tumour necrosis factor α (TNF-α), IFN-α, IL-1β or IL-6.
During exertional heat stress, blood flow is preferentially distributed away from the intestinal area to supply the muscles and brain with oxygen. Consequently, the gastrointestinal barrier becomes increasingly permeable, resulting in the release of lipopolysaccharides
This is consistent with the idea that SEID is a mild form of sepsis: Could Chronic Fatigue Syndrome (ME/CFS) Be a Chronic Form of Sepsis?
At 14:00 minutes into this video it shows a 100% genetic expression match of ME/CFS to Systemic inflammatory response syndrome (SIRS). Which is the same response as in sepsis.
So I'd like to see some evidence for this LPS translocation.
@Hip as others have previously said gut dysbiosis and potential bacterial translocation or the role of intracellular bacteria is a common research area atm for many ME researchers/clinicians.
The mechanism is not fully understood but this review paper entitled "Gastrointestinal and hepatic mechanisms limiting entry and dissemination of lipopolysaccharide into the systemic circulation" provides some clues. Fig 2. on page G9 illustrates the possible mechanisms.
Finally, if LPS crosses the gut mucosa, it is directed via the portal vein to the liver, where major detoxification processes occur by deacetylation and excretion through the bile. If this disposal process is not sufficient, LPS enters the systemic circulation, where it is handled by numerous transport proteins that clear it back to the liver for further excretion.
I think what's being debated here is the same thing that occurs even in healthy endurance athletes, exercise induced GI hypoperfusion that may provoke transient damage to the gut epithelium. Some studies have found significantly increased luminal permeability in untrained healthy volunteers too.@kangaSue might have something to say about the vasodilating effects of the drug nicorandil in the intestines.