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  • Title: Human herpesvirus 8 virology, epidemiology and related diseases.
    Author: Katano H, Sata T.
    Journal: Jpn J Infect Dis; 2000 Aug; 53(4):137-55. PubMed ID: 11056556.
    Abstract:
    Human herpesvirus 8 ([HHV-8], Kaposi's sarcoma-associated herpesvirus [KSHV]) is a novel human oncovirus classified as a gamma-herpesvirus. HHV-8 is associated with Kaposi's sarcoma (KS), primary effusion lymphoma (PEL) and some cases of multicentric Castleman's disease (MCD). Antibodies against HHV-8 are detected in the sera of almost all KS patients, about 30% of HIV-infected homosexual males in the world and 1.4% of the Japanese population. In HHV-8-associated malignancies such as KS and PEL, HHV-8 latently infects these tumor cells. Unlike other viruses, HHV-8 encodes several human homologues including cytokines (IL-6, MIPs, IRFs) and regulatory proteins (cyclin D, G-protein coupled receptor [GPCR]). These proteins may play significant roles in the pathogenesis of HHV-8-associated diseases. It has been demonstrated in vitro that the functions of retinoblastoma and p53 proteins were inhibited by viral cyclin D and latency-associated nuclear antigen, respectively. Mice transgenic for GPCR have a KS-like region in the skin. These data suggest the full oncogenecity of HHV-8. On the other hand, many cells expressing lytic proteins are found in MCD tissues, suggesting that the pathogenesis of MCD is different from that of HHV-8-associated malignancies.
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