Ken's post
Someone emailed me the post. He seems to be focussing on Vitamin D. As for the German results and a regional infection--we don't know what assays/techniques the Germans used.
As for Vitamin D, evidence certainly does show it's important in immunity generally. I personally am not convinced that supplements are the best; I think sun is better and may have broader effects than we realize.
I'm also not sure he's interpreting the XMRV "helper" of MLV correctly. XMRV is a variant of MLV (murine leukemia virus) that can infect humans. The study he's referring to is one dannybex posted, and I read it as saying, though we've taken the replication sequences out of MLV when using it as a vector in gene therapy, if it's in the presence of XMRV it can replicate because XMRV serves as a helper virus to help it do so. This doesn't mean that in the human, for instance, XMRV would help nonreplicating viruses replicate, or would stimulate latent viruses to replicate. It's possible but who knows. And besides, generally, I think when one virus switches on it probably stimulates others to replicate too.
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Hi Ken, here -- finally making a little time to put together my thoughts and do some basic research on pub med
Item 1: What we know about XMRV
(16 articles)
1. "a prevalence of 40% in prostate tumor samples from American patients carrying a homozygous R462Q mutation in the RNaseL gene." and "Our results indicate a much lower prevalence (or even complete absence) of XMRV in prostate tumor patients in Germany"
http://www.ncbi.nlm.nih.gov/pubmed/1983557 --> XMRV may be a regional infection!!!???!!
2. "We found XMRV infection to be independent of a common polymorphism in the RNASEL gene, unlike results previously reported.
This finding increases the population at risk for XMRV infection from only those homozygous for the RNASEL variant to all individuals. Our observations provide evidence for an association of XMRV with malignant cells and with more aggressive tumors."
http://www.ncbi.nlm.nih.gov/pubmed/19805305
3. "RNase L gene has been identified as HPC1 (Hereditary Prostate Cancer 1) gene. That finding has led to the discovery of a novel human retrovirus, XMRV."
http://www.ncbi.nlm.nih.gov/pubmed/18950583
4. "XMRV was rarely detected in non-familial prostate cancer samples from Northern European patients."
http://www.ncbi.nlm.nih.gov/pubmed/18823818 --> Suggests that the ability to get it may be genetic....
5. "We tested the ability of XMRV to complement replication-deficient MLV vectors upon co-infection of cultured human cells. We observed that XMRV can facilitate the spread of these vectors from infected to uninfected cells."
http://www.ncbi.nlm.nih.gov/pubmed/18769545 --> Suggests that it may NOT be the causal virus, but a helper virus...
6. " These data provide to our knowledge the first demonstration that xenotropic MuLV-related viruses can produce an authentic human infection, and strongly implicate RNase L activity in the prevention or clearance of infection in vivo. These findings also raise questions about the possible relationship between exogenous infection and cancer development in genetically susceptible individuals."
--> It looks like the RNase-L research was in the right direction...
The association of XMRV with prostrate cancer rang a bell with me, because low vitamin D levels was a predictor for prostrate cancer.
* " A vitamin D deficiency has also been documented in patients with prostate cancer, ovarian cancer, as well as multiple myeloma"
http://www.ncbi.nlm.nih.gov/pubmed/19817700
* " Most identified ecological, case-control and prospective studies on the incidence and mortality of colorectal, prostate, breast carcinoma and non-Hodgkin lymphoma reported a significantly inverse association with sun exposure."
http://www.ncbi.nlm.nih.gov/pubmed/19730382
* "These results suggest that VDR polymorphisms may be potential biomarkers for prostate cancer susceptibility."
http://www.ncbi.nlm.nih.gov/pubmed/19684888
--> genetic variations is a factor.
Well, those of you that are females are probably asking... prostrate cancer? The significant aspect is that the virus is associated with two
things: CFIDS and prostrate cancer. With prostrate cancer, we know that a low Vitamin D level increases risk of getting it, decreases survivability if you got it etc.
It is reasonable to assume that the
damage the XMRV does with CFIDS is also influenced greatly by Vitamin D levels (which was seen by Dr. Hock in Germany). So the first step would be to try hard to increase the Vitamin D levels to the optimal levels (not just into the "normal range" seen in the local vitamin-D deficient population. 2nd step would be antivirals...
For most of you, that would likely mean 10,000 IU/day (Consult with your MD on your current level) which should be **gradually** worked up to.
Some CFIDS react (herx for a few hours) at 50 IU..