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Antiviral therapy helps children at risk for post-transplant lymphoproliferative disease
Date:7/31/2008

The antiviral drug, valganciclovir, can lower the levels of Epstein-Barr virus in children with liver transplants, according to a new study. About half of young transplant recipients with detectable levels of the virus in their blood responded to a long course of the therapy, with 60 percent maintaining their response when they stopped taking the drug. These findings are in the August issue of Liver Transplantation, a journal by John Wiley & Sons. The article is also available online at Wiley Interscience (www.interscience.wiley.com).

Many pediatric liver recipients become infected with Epstein-Barr virus post-transplant, probably because the latent virus is in lymphocytes in the graft or in blood derivatives. Immunosuppressants taken to control rejection change the children's normal immune response to the virus, leading in some cases to uncontrolled lymphocyte B proliferation. Antiviral therapy is one possible way to address the danger of Epstein-Barr infection in transplant recipients.

Researchers, led by Paloma Jara of Madrid, studied the effects of valganciclovir in 47 pediatric transplant recipients with detectable Epsten-Barr DNA in their blood. They hoped to decrease the risk of post-transplant lymphoproliferative disease (PTLD) by blocking the viral replication that can lead to lymphocyte B proliferation.

After a median 8 months of treatment, EBV-DNA became undetectable in about half of the children who were asymptomatic at the start of the therapy, and no new cases of PTLD developed. In one child, who started the study with suspected PTLD, symptoms worsened over the course of the study. The safety profile was excellent, with no severe adverse events attributed to the drug.

The authors suggest that their results be interpreted with caution as they did not include a control group, and because the short timeframe for follow-up yielded no definitive conclusions about
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Contact: Sean Wagner
swagner@wiley.com
781-388-8550
Wiley-Blackwell
Source:Eurekalert

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