Wednesday, March 30, 2011

More Evidence TNF-alpha Allows Viral Persistence


This comment came on one of my think tank blogs from researcher and professor Dick Deth:

“Viruses such as XMRV are suppressed by methylation, and the enzyme methionine synthase is a master controller of methylation. We observed very powerful and rapid inhibition of methionine synthase (MS) transcription by TNF-alpha (>90% decrease of MS mRNA). An examination of the promoter region of methionine synthase revealed a consensus site for NF-kappa-B binding which overlaps the normally promotional AP-1 site.

Thus we can hypothesize that TNF-alpha decreases methylation activity via NF-kappa-B. This decrease will augment viral persistence and replication. Notably, MS is very sensitive to oxidative stress, implying that oxidative stress, initiated by any number of provocations, would increase susceptibility to viral infection.

Persistent viral infection could in turn prolong/delay recovery from oxidative stress, leading to a persistent oxidative stress and persistent v (a self-reinforcing relationship). In other words we normally recover from an oxidative stress-producing event, but the presence of a viral infection can turn this into a chronic condition…”

This is exactly what we are observing in numerous conditions including XMRV, Autism and ME/CFS. The good news is these conditions can be treated.


Anonymous said...

This would be more useful if the doctor followed his assertion "these can be treated" with some details of which treatments are efficacious and which deleterious to patients with ME.

Dr Speedy said...

Just what I missed in it as well.

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