Itoconate Part 2
Summary Part 1 (He gives this)
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Innate immune system triggers Itoconate Shunt.
The shunt cuts off the citric acid cycle to bridge 2-OG to Succicante and OAA to Citrate.
We loose the ability to process lipids into energy.
Glumate becomes the only mechanism to produce power from amino acids but produces ammonia (a neurotoxin).
Itaconyl-CoA is produced with the shunt and it poisons B12.
Theory is this is cells that were near an infection event but not in it and hence have not been killed by the immune system.
A few enzymes can repair this in the cells - GAD2, GAD - glumate Decarboxylase, GABA transaminase and SSADH.
But these are inefficient and only allow you to burn amino acids.
This is really bad in the brain as glutmate and GABA are neurotransmitters
Burning these transmitters is probably where brain fog comes from.
Part 2
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Either bacteria (LPS) or Virus is TLR sensed turns on NFkB inflammatory response
Produces TNFa, CCL2, CD80
TNFa - increases vascular infusion allowing more cells in
CCL2 - chemokines - signal path into the blood draw cells in
CD80 - remains on the cell signals it is infected
Second mechanism is the TLR's produce IRF7-Pi drives IFNa comes out of cell and talks to the neighbouring cells. Tells cells nearby to ready for infection.
The theory is that the bystander cells readiness state becomes chronic. That is ME/CFS (if the theory is right).
IFNa binds to IFNAR JAK1 signals to STAT1 and STAT2
Jak stat signalling pathway. Produces ISGF3. These turn on transcription genes that lead to Interferon A.
The reason to do this is to reduce the resources for replication for the virus/bacteria to use.
The itoconate shunt isn't the only response. IFNa is one of these thins produced, so there is a cycle of IFNa so it could signal itself.
Concern is the pathways that normally turn off IFNa production don't turn off in ME/CFS.
They are measuring IFNa.
Theory predictions
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IFNa appears increased median a 25-75%, its 4x. Should be more IFNa in blood for ME/CFS patients.
Unfortunately a couple of health controls have IFNa in their blood as high as severe ME/CFS patients. So its not a biomarker on its own. Those two individuals with high blood IFNa probably produce this in their blood cells not peripheral cells. They think the problem is intercellular in the tissue not in the blood for ME/CFS.
They will be measuring IFNa in cells and peripheral tissues.
Some ME/CFS patients are really low too below the level of detection.
Points to possibility that IFNa is higher than health controls.
Splitting the patients by Bell ability score (what they can and can't do), bell 0 is very ill, healthy has 100.
There is a progression from low IFNa to high IFNa for reducing Bell score.
Pathways to switch off IFNa - going to measure SOCS3 thought to be the major pathway is turned off or SOCS1.
Other mechanisms to turn off these pathway, need to be able to check if this is how it works for normal cells and if its broken in ME/CFS patients.
Heal or beak positive loop need to interupt the signalling. There are drugs for binding to IFNa and breaking the JAK-STAT pathway.
Significant side effects if we would need this all the time, we need IFNa signally to fight a virus/bacteria.
Hope is it would only have to be for a short period of time to break the positive feedback loop.
For the period of 1 or 3 days you would have to stay away from people/infection.
If that block doesn't work then they will need to identify the checkpoint pathway that isn't functioning. There are about 100 of these. Its doable to measure the mRNA and molecular biology.
The blood is the ocean and the sources of IFNa are the rivers of the world, we see it in the ocean in low concentrations in the ocean but we don't know which river is producing the pollutant.
Probably 10,000 fold lower in the blood compared to the problem area.
The low amount in the blood isn't a concern.
Intersection with Bhupesh Prusty.
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idea 1 - mRNA with reactivated HHV-6 could be sensed as foreign by innate immune system TLR. Constant production of mRNA could keep the innate immune system turned on.
idea 2 - mRNAs with reactivated HHV-6 could be targeting the innate immune system areas that turn off JAK-STAT pathway. Degrades it and you can't turn off IFNa and the direct cause of the positive feedback loop.
Q Timeline?
If possible to break feedback loop IFNa or JAK-STAT both have FDA approved drugs, treatment not fair off at all. Have to be sure its right and need the data properly explained.