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Use of In vivo Imaging to Monitor the Progression of Experimental Mouse Cytomegalovirus Infection in Neonates
Published on: July 6, 2013
Alteration of direct and indirect effects of cytomegalovirus
Nassim Kamar1, Catherine Mengelle, Lionel Rostaing
1Tuberculosis and Lung Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Abstract:
For recipients of a solid organ transplant, cytomegalovirus infection causes many pathological conditions including direct and indirect effects, most notably owing to the potency of the immunosuppressive medications used. Effects attributed to cytomegalovirus infection include graft rejection, decreased graft and patient survival rates, predisposition to other opportunistic infections, virally mediated malignancies, and various injuries specific to the transplanted organs (eg, accelerated coronary atherosclerosis following heart transplant, bronchiolitis obliterans syndrome in lung transplants, and vanishing bile-duct syndrome in liver allografts). Other indirect effects include posttransplant lymphoproliferative disorders, posttransplant new onset diabetes, and recurrence of hepatitis C virus infection. Direct effects are related to viral burden, whereas indirect effects may be observed even in the presence of low levels of cytomegalovirus replication. Being a function of the interaction between the virus and the host's immune and inflammatory responses, the underlying indirect effects of viral infection are not completely understood. Whereas it has been shown that cytomegalovirus prophylaxis can decrease the direct and indirect effects of the virus, recent data indicate that pre-emptive therapy has no long-term impact upon the indirect effects. Prevention of cytomegalovirus-related indirect effects might be achieved only with prophylaxis.
Insights
Cytomegalovirus infection in organ transplant recipients causes significant direct and indirect pathological effects. Prophylaxis is crucial for preventing these adverse outcomes, as pre-emptive therapy shows no long-term benefit for indirect effects.
Area of Science:
- Immunology
- Transplant Medicine
- Virology
Background:
- Cytomegalovirus (CMV) infection poses serious risks to solid organ transplant recipients due to potent immunosuppression.
- CMV infection can lead to graft rejection, reduced survival, opportunistic infections, and malignancies.
Purpose of the Study:
- To elucidate the direct and indirect pathological effects of cytomegalovirus infection in solid organ transplant recipients.
- To evaluate the efficacy of prophylactic versus pre-emptive CMV therapy in mitigating these effects.
Main Methods:
- Review of existing literature on CMV infection in transplant patients.
- Analysis of direct effects (viral burden) and indirect effects (immune-mediated complications).
Main Results:
- Direct effects include organ-specific injuries (e.g., cardiac allograft vasculopathy, BOS, VBD).
- Indirect effects encompass posttransplant lymphoproliferative disorders, new-onset diabetes, and HCV recurrence.
- Prophylaxis reduces both direct and indirect CMV effects, while pre-emptive therapy has limited long-term impact on indirect effects.
Conclusions:
- Cytomegalovirus infection presents multifaceted challenges in solid organ transplantation.
- Prophylactic strategies are essential for comprehensive prevention of CMV-related complications, particularly indirect effects.
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