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      Temporal response of the human virome to immunosuppression and antiviral therapy.

      Cell
      Adult, Antibiotic Prophylaxis, Antiviral Agents, therapeutic use, Blood, microbiology, virology, Child, DNA, blood, genetics, Heart Transplantation, Humans, Immunosuppressive Agents, Lung Transplantation, Viruses, classification, isolation & purification

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          Abstract

          There are few substantive methods to measure the health of the immune system, and the connection between immune strength and the viral component of the microbiome is poorly understood. Organ transplant recipients are treated with posttransplant therapies that combine immunosuppressive and antiviral drugs, offering a window into the effects of immune modulation on the virome. We used sequencing of cell-free DNA in plasma to investigate drug-virome interactions in a cohort of organ transplant recipients (656 samples, 96 patients) and find that antivirals and immunosuppressants strongly affect the structure of the virome in plasma. We observe marked virome compositional dynamics at the onset of the therapy and find that the total viral load increases with immunosuppression, whereas the bacterial component of the microbiome remains largely unaffected. The data provide insight into the relationship between the human virome, the state of the immune system, and the effects of pharmacological treatment and offer a potential application of the virome state to predict immunocompetence. Copyright © 2013 Elsevier Inc. All rights reserved.

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