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Viral infection in the renal transplant recipient
1Harvard Medical School, Boston, Massachusetts.
Abstract:
The viral infections with greatest impact on the renal transplant recipient are those due to cytomegalovirus, Epstein-Barr virus, and the two hepatitis viruses, hepatitis B and C. All of these are modulated by the administered immunosuppressive therapy, and all have both direct and indirect effects on the transplant patient. The direct effects are the infectious disease clinical syndromes that are produced (fever and malaise, pneumonia, hepatitis, and so forth). The indirect effects are several--all of these viruses contribute to the patient's net state of immunosuppression, predisposing him or her to the development of opportunistic superinfection with a variety of pathogens. In addition, both Epstein-Barr virus and hepatitis B virus have been clearly linked to the development of certain malignancies (lymphoproliferative disease and hepatocellular carcinoma, respectively). Finally, cytomegalovirus has been linked to allograft injury. Although antiviral strategies effective for cytomegalovirus and Epstein-Barr virus infection are being developed, similar programs are not yet available for the hepatitis viruses.
Insights
Renal transplant recipients face significant risks from cytomegalovirus, Epstein-Barr virus, and hepatitis B and C infections. These viruses cause direct illness, increase immunosuppression, and are linked to cancers and allograft injury.
Area of Science:
- Nephrology
- Infectious Diseases
- Transplant Immunology
Background:
- Renal transplant recipients are vulnerable to specific viral infections.
- Cytomegalovirus (CMV), Epstein-Barr virus (EBV), hepatitis B (HBV), and hepatitis C (HCV) pose major threats.
- Immunosuppressive therapy significantly influences these viral infections.
Purpose of the Study:
- To outline the impact of key viral infections on renal transplant recipients.
- To describe the direct and indirect effects of these viruses.
- To highlight the association of viruses with malignancy and allograft injury.
Main Methods:
- Review of clinical syndromes associated with viral infections.
- Analysis of indirect effects, including immunosuppression and opportunistic infections.
- Examination of virus-associated malignancies and allograft complications.
Main Results:
- CMV, EBV, HBV, and HCV infections have direct clinical manifestations.
- These viruses exacerbate immunosuppression, increasing susceptibility to superinfections.
- EBV is linked to lymphoproliferative disease; HBV to hepatocellular carcinoma; CMV to allograft injury.
Conclusions:
- Viral infections are a critical concern in renal transplantation.
- Understanding direct and indirect viral effects is crucial for patient management.
- Antiviral strategies for CMV and EBV are advancing, but hepatitis virus treatments lag.