Antiviral prevention of sepsis induced cytomegalovirus reactivation in immunocompetent mice.
BACKGROUND
Immunocompetent patients can reactivate latent cytomegalovirus (CMV) during critical illness and reactivation is associated with significantly worse outcomes. Prior to clinical trials in humans to prove causality, we sought to determine an optimal antiviral treatment strategy.


METHODS
Mice latently infected with murine CMV (MCMV) received a septic reactivation trigger and were randomized to receive one of four ganciclovir regimens or saline. Lungs were evaluated for viral transcriptional reactivation and fibrosis after each regimen. Influences of ganciclovir on early sepsis-induced pulmonary inflammation and T-cell activation were studied after sepsis induction.


RESULTS
All ganciclovir regimens reduced measurable MCMV transcriptional reactivation, and 10mg/day for 7 or 21 days was most effective. Lower dose (5mg/kg/day) or delayed therapy was associated with significant breakthrough reactivation. Higher doses of ganciclovir given early were associated with the lowest incidence of pulmonary fibrosis, and delay of therapy for 1 week was associated with significantly worse pulmonary fibrosis. Although bacterial sepsis induced activation of MCMV-specific pulmonary T-cells, this activation was not influenced by ganciclovir.


CONCLUSIONS
These results suggest that antiviral treatment trials in humans should use 10mg/kg/day ganciclovir administered as early as possible in at-risk patients to minimize reactivation events and associated pulmonary injury.
Forster
Meghan R
MR
Department of Surgery, The Ohio State University, Columbus, OH 43210, United States.
Trgovcich
Joanne
J
Zimmerman
Peter
P
Chang
Alexander
A
Miller
Cortland
C
Klenerman
Paul
P
Cook
Charles H
CH
D000818:Animals; D000998:Antiviral Agents / Q000008:administration & dosage*; D003586:Cytomegalovirus Infections / Q000517:prevention & control* / Q000821:virology; D004195:Disease Models, Animal; D005260:Female; D015774:Ganciclovir / Q000008:administration & dosage*; D006801:Humans; D008168:Lung / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D018146:Muromegalovirus / Q000502:physiology*; D011897:Random Allocation; D018805:Sepsis / Q000150:complications*; D014775:Virus Activation
D000998:Antiviral Agents; D015774:Ganciclovir