http://www.plosone.org/article/info:doi/10.1371/journal.pone.0044954
This is a follow up study by the very discoverers of XMRV (Urisman, Silverman, DeRisi, Fischer and others). They basically re-evaluated their original cohort/samples as well as new ones, and determined that their original findings were wrong.
Moreover, they checked their original samples for contamination and found "direct evidence" for contamination (using mitochondrial SNP analysis).
The authors conclude that:
EDIT: sorry for the bad typo in the thread title.
This is a follow up study by the very discoverers of XMRV (Urisman, Silverman, DeRisi, Fischer and others). They basically re-evaluated their original cohort/samples as well as new ones, and determined that their original findings were wrong.
Moreover, they checked their original samples for contamination and found "direct evidence" for contamination (using mitochondrial SNP analysis).
The authors conclude that:
In summary, our findings do not support any association between XMRV infection and prostate cancer, and by extension indicate that XMRV has never replicated outside of the laboratory setting. The initial discovery linking XMRV to prostate cancer in 2006 arose from laboratory contamination of clinical samples by an XMRV-infected LNCaP cell line. In turn, the LNCaP cells were most likely previously infected by 22Rv1, from which XMRV almost certainly originated through in vivo passaging of the CWR22 xenograft in mice.
EDIT: sorry for the bad typo in the thread title.