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Am J Transplant ; 8(3): 707-10, 2008 Mar.
Article in English | MEDLINE | ID: mdl-18261181

ABSTRACT

The Akt/mammalian target of rapamycin (mTOR) signaling cascade has been demonstrated to be constitutively activated in several malignancies, including Kaposi sarcoma (KS) and human herpesvirus-8 (HHV-8)-associated primary effusion lymphoma (PEL). In organ transplant recipients, therapeutic change from cyclosporin to the mTOR inhibitor rapamycin can lead to regression of KS lesions. Recent experiments using PEL cell lines and murine xenograft PEL models suggested that rapamycin could inhibit the growth of PEL cells. In the present report, we describe the cases of two HIV-1-negative males of African origin who underwent renal transplantation and developed PEL while receiving rapamycin as immunosuppressive treatment. Both patients were retrospectively found to be HHV-8 seropositive before renal transplantation. The present case report suggests that rapamycin may not protect HHV-8-infected renal transplant recipients from occurrence of PEL or progression of pre-existing PEL.


Subject(s)
Herpesviridae Infections/drug therapy , Herpesvirus 8, Human , Immunosuppressive Agents/therapeutic use , Kidney Transplantation , Lymphoma, Primary Effusion/drug therapy , Sirolimus/therapeutic use , Fatal Outcome , Herpesviridae Infections/diagnosis , Herpesvirus 8, Human/isolation & purification , Humans , Lymphoma, Primary Effusion/diagnosis , Lymphoma, Primary Effusion/virology , Male , Middle Aged , Treatment Failure
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