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HHV-6 increases risk of an “idiopathic” pneumonia syndrome after HCT as does murine roseolovirus in a BMT mouse model. Early HHV-6 was also found to increase non-relapse mortality

In All, Animal Models, Lung Disease, Transplant Complications by Kristin Loomis

Investigators from University of Michigan have demonstrated that murine roseolovirus is a useful homolog for the study of HHV-6 reactivation in lung disease. In a large retrospective study of HCT patients, they also found early HHV-6 reactivation to increase the risk of both idiopathic pneumonia syndrome and non-relapse mortality.

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HHV-6 is a greater risk than CMV for rejection in pediatric kidney transplantation

In All, Kidney Disease, Transplant Complications by Kristin Loomis

Investigators from the Children’s Hospital of Mexico found that although CMV caused the biggest increase in risk for liver rejection, HHV-6 was the more important infection associated with rejection of kidney transplants. A single HHV-6 infection resulted in an increased risk of over 5 fold, while a coinfection of EBV, HHV-6 and HHV-7 increased the risk of kidney rejection by over 17 fold.

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HHV-6 in Cancer: Does it play a role?

In All, Cancer by Kristin Loomis

Since its discovery, HHV-6 has been studied in the context of lymphoproliferative disorders and various types of cancer. Several obstacles, particularly the ubiquitous nature of the virus, have made it difficult to determine exactly how HHV-6 might, or might not, be involved in tumor development.