Iowa City Veterans Affairs (VA) Medical Center and University of Iowa (UI) researchers have unlocked part of the mystery of how a harmless virus known as GBV-C slows the progression of HIV and prolongs survival for many patients. The report appears in the June 19 issue of The Lancet, the leading British medical journal.
The findings provide the clearest insight yet into the biological mechanisms of GBV-C, a benign cousin of the hepatitis C virus. The virus infects almost all HIV patients at some point in their illness, but seems to cause no harm by itself. When present over several years, the virus appears to slow HIV growth and keep patients from developing full-blown AIDS.
A study by the Iowa City team and other collaborators published in the March 4, 2004, New England Journal of Medicine found that 75 percent of men with persistent GBV-C infection survived at least 11 years after their HIV diagnosis, versus only 16 percent of men who were initially co-infected with GBV-C but cleared the virus over time. The men had been studied before the advent of effective HIV medications.
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