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Study isolates virus in chronic fatigue sufferers
By David Morgan
Published in The Saudi Gazette on 10 - 10 - 2009

A virus linked to prostate cancer also appears to play a role in chronic fatigue syndrome, according to research that could lead to the first drug treatments for a mysterious disorder that affects 17 million people worldwide.
Researchers found the virus, known as XMRV, in the blood of 68 out of 101 chronic fatigue syndrome patients. The same virus showed up in only 8 of 218 healthy people, they reported on Thursday in the journal Science.
Judy Mikovits of the Whittemore Peterson Institute in Nevada and colleagues at the National Cancer Institute and the Cleveland Clinic emphasized that the finding only shows a link between the virus and chronic fatigue syndrome, or CFS, and does not prove that the pathogen causes the disorder.
Much more study would be necessary to show a direct link, but Mikovits said the study offers hope that CFS sufferers might gain relief from a cocktail of drugs designed to fight AIDS, cancer and inflammation.
She said AIDS drugs such as non-nucleoside reverse transcriptase inhibitors and integrase inhibitors as well as nonsteroidal anti-inflammatory drugs and cancer-fighting proteasome inhibitors could be tested as potential treatments for CFS.
Incapacitating fatigue
CFS impairs the immune system and causes incapacitating fatigue, according to the US Centers for Disease Control and Prevention. Sufferers can also experience memory loss, problems with concentration, joint and muscle pain, headaches, tender lymph nodes and sore throats.
Symptoms last at least six months and can be as disabling as multiple sclerosis or rheumatoid arthritis, the CDC said.
But Mikovits said there is currently no treatment for CFS aside from cognitive behavioral therapy to help patients cope with the disorder's crippling effects.
The XMRV virus is a retrovirus, like the HIV virus that causes AIDS. As with all viruses, a retrovirus copies its genetic code into the DNA of its host but uses RNA - a working form of DNA - instead of using DNA to do so.
Known formally as xenotropic murine leukemia virus-related virus, XMRV has also been found in some prostate tumors and is also known to cause leukemia and tumors in animals.
Mikovits' team said further research must now determine whether XMRV directly causes CFS, is just a passenger virus in the suppressed immune systems of sufferers or a pathogen that acts in concert with other viruses that have been implicated in the disorder by previous research.


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