Stürzel, Christina Martina, Palesch, David, Khalid, Mohammad et al. · PloS one · 2013 · DOI
Researchers tested whether XMRV, a virus once thought to be linked to ME/CFS, could actually infect and spread in human immune cells. They found that while the virus could replicate in some laboratory cell lines, it could not effectively infect or spread in real human blood cells from patients. This supports the conclusion that XMRV is unlikely to be a genuine human pathogen responsible for ME/CFS.
For ME/CFS patients, this study addresses a critical question about whether XMRV—a virus that generated significant controversy when initially associated with ME/CFS—is actually capable of infecting human immune cells. The findings provide empirical evidence that XMRV cannot productively replicate in primary human immune cells, supporting the conclusion that it is unlikely a causative pathogen for the disease and potentially resolving years of conflicting research.
This study does not definitively prove that XMRV plays no role in any human disease, as infection might occur in tissues not tested (e.g., neural tissue, gut, bone marrow). It also does not address whether patients with ME/CFS might harbor defective or latent XMRV variants, nor does it exclude the possibility that other related retroviruses could have tropism for primary human cells.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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