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Updated: Aug 17, 2026

Generation of Multivirus-specific T Cells to Prevent/treat Viral Infections after Allogeneic Hematopoietic Stem Cell Transplant
Published on: May 27, 2011
Human herpesviruses-6, -7 and -8 in organ transplant recipients
1Veterans Affairs Medical Center and University of Pittsburgh, Thomas E. Starzl Transplantation Institute, Pittsburgh, Pennsylvania, USA. nis5+@pitt.edu
Abstract:
The newer herpesviruses are being increasingly recognized as significant opportunistic pathogens in organ transplant recipients. Published data support the role of human herpesvirus-6 as a potential cause of encephalitis and bone marrow suppression in transplant setting. An association of human herpesvirus-6 with fungal infections and cytomegalovirus infection has also been documented. Human herpesvirus-7 also appears to be an immunomodulatory agent and may facilitate the pathogenicity of cytomegalovirus. Unlike human herpesviruses -6 and -7, human herpesvirus -8 is not ubiquitous; its seroprevalence exhibits wide geographic variation. Human herpesvirus-8 has been causally associated with post-transplant Kaposi's sarcoma. The complete spectrum of pathogenicity and ultimately the effective prophylaxis and management of these viruses has yet to be fully elucidated.
Insights
Newer herpesviruses like human herpesvirus-6, -7, and -8 are opportunistic pathogens in organ transplant recipients, causing issues like encephalitis and Kaposi
Area of Science:
- Virology
- Immunology
- Transplant Medicine
Background:
- Newer herpesviruses are increasingly recognized as opportunistic pathogens in organ transplant recipients.
- Human herpesvirus-6 (HHV-6) is linked to encephalitis and bone marrow suppression.
- Human herpesvirus-7 (HHV-7) may influence cytomegalovirus (CMV) pathogenicity.
- Human herpesvirus-8 (HHV-8) is associated with Kaposi's sarcoma.
Purpose of the Study:
- To review the role of newer herpesviruses in organ transplant recipients.
- To highlight the clinical significance and associations of HHV-6, HHV-7, and HHV-8.
Main Methods:
- Literature review of published data.
- Analysis of associations between herpesviruses and transplant complications.
Main Results:
- HHV-6 is implicated in encephalitis and bone marrow suppression.
- HHV-6 is associated with fungal and CMV infections.
- HHV-7 may act as an immunomodulatory agent, aiding CMV.
- HHV-8, with variable seroprevalence, is causally linked to post-transplant Kaposi's sarcoma.
Conclusions:
- Newer herpesviruses pose significant risks in organ transplantation.
- Further research is needed to fully understand their pathogenicity, prophylaxis, and management.
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