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Of mice and men: On the origin of XMRV (How did XMRV enter the human population?) - Source: Frontiers in Virology, Dec 26, 2010

  [ 8 votes ]   [ 1 Comment ]
By Antoinette C Van Der Kuyl, et al. • • December 29, 2010

[Note: to access the free full text of this readable article, reviewing evidence that XMRV is a human retrovirus and a hypothesis that would explain issues regarding ability to detect it in human samples, click HERE and select ‘provisional pdf’.]

The novel human retrovirus XMRV (xenotropic murine leukemia virus-related virus) is arguably the most controversial virus of this moment.

After its original discovery in prostate cancer tissue from North American patients, it was subsequently detected in individuals with chronic fatigue syndrome (CFS) from the same continent.

However, most other research groups, mainly from Europe, reported negative results.

The positive results could possibly be attributed to contamination with mouse products in a number of cases, as XMRV is nearly identical in nucleotide sequence to endogenous retroviruses in the mouse genome.

But the detection of XMRV proviruses in prostate cancer tissue proves it to be a genuine virus that replicates in human cells, leaving the question: how did XMRV enter the human population?

We will discuss two possible routes:

• Either via direct virus transmission from mouse to human, as repeatedly seen for e.g. hantaviruses,

• Or via the use of mouse-related products by humans, including vaccines.

We hypothesize that mouse cells or human cell lines used for vaccine production could have been contaminated with a replicating variant of the XMRV precursors encoded by the mouse genome.

Source: Frontiers in Virology, Dec 26, 2010. PMID: by Van Der Kuyl AC, Cornelissen M, Berkhout B. Medical Microbiology, Academic Medical Centre, University of Amsterdam, The Netherlands. [Email:]

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Article Comments Post a Comment

Great thinking
Posted by: IanH
Dec 29, 2010
This analysis by Antoinette C. van der Kuyl, Marion Cornelissen and Ben Berkhout from The Netherlands is truly excellent. If correct then the incidence of XMRV in the British population will be low compared to the U.S. more in Germany and a smattering of it around the world. It suggests that XMRV, if a cause at all, will be a/the cause in some, mostly North Americans. The analysis also implies that aside from vaccination (e.g. for HBV) the blood supply is the main infector in the case of XMRV-ME/CFS. What is the incidence of XMRV in Gulf War veterans? from the US, from Britain, from Germany?
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