scholarly journals High Prevalence of Antibodies to Human Herpesvirus 8 in Relatives of Patients with Classic Kaposi's Sarcoma from Sardinia

1998 ◽  
Vol 177 (6) ◽  
pp. 1715-1718 ◽  
Author(s):  
Antonio Angeloni ◽  
Lee Heston ◽  
Stefania Uccini ◽  
Maria Caterina Sirianni ◽  
Francesca Cottoni ◽  
...  
Keyword(s):  
Kaposi's Sarcoma ◽  
Human Herpesvirus ◽  
Kaposi’S Sarcoma ◽  
Human Herpesvirus 8 ◽  
Herpesvirus 8 ◽  
High Prevalence

Detection of human herpesvirus 8 DNA and antibodies to latent nuclear and lytic-phase antigens in serial samples from aids patients with Kaposi’s sarcoma

2000 ◽  
Vol 16 (3) ◽  
pp. 247-251 ◽  
Author(s):  
Lı́gia Camera Pierrotti ◽  
Laura Masami Sumita ◽  
Wilton Santos Freire ◽  
Hélio Hehl Caiaffa Filho ◽  
Vanda Akico Ueda Fick de Souza
Keyword(s):  
Kaposi's Sarcoma ◽  
Human Herpesvirus ◽  
Kaposi’S Sarcoma ◽  
Human Herpesvirus 8 ◽  
Aids Patients ◽  
Herpesvirus 8 ◽  
Serial Samples

scholarly journals Activation of NF-κB by the Human Herpesvirus 8 Chemokine Receptor ORF74: Evidence for a Paracrine Model of Kaposi's Sarcoma Pathogenesis

2001 ◽  
Vol 75 (18) ◽  
pp. 8660-8673 ◽  
Author(s):  
Shibani Pati ◽  
Marielle Cavrois ◽  
Hong-Guang Guo ◽  
James S. Foulke ◽  
Jynho Kim ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Kaposi's Sarcoma ◽  
Vascular Endothelial Cells ◽  
Inositol Phosphate ◽  
Human Herpesvirus ◽  
Kaposi’S Sarcoma ◽  
Lymphoid Cells ◽  
Human Herpesvirus 8 ◽  
Herpesvirus 8 ◽  
Latently Infected

ABSTRACT Infection with human herpesvirus 8 (HHV-8), also known as Kaposi's sarcoma (KS)-associated herpesvirus, is necessary for the development of KS. The HHV-8 lytic-phase gene ORF74 is related to G protein-coupled receptors, particularly interleukin-8 (IL-8) receptors. ORF74 activates the inositol phosphate/phospholipase C pathway and the downstream mitogen-activated protein kinases, JNK/SAPK and p38. We show here that ORF74 also activates NF-κB independent of ligand when expressed in KS-derived HHV-8-negative endothelial cells or primary vascular endothelial cells. NF-κB activation was enhanced by the chemokine GROα, but not by IL-8. Mutation of Val to Asp in the ORF74 second cytoplasmic loop did not affect ligand-independent signaling activity, but it greatly increased the response to GROα. ORF74 upregulated the expression of NF-κB-dependent inflammatory cytokines (RANTES, IL-6, IL-8, and granulocyte-macrophage colony-stimulating factor) and adhesion molecules (VCAM-1, ICAM-1, and E-selectin). Supernatants from transfected KS cells activated NF-κB signaling in untransfected cells and elicited the chemotaxis of monocytoid and T-lymphoid cells. Expression of ORF74 conferred on primary endothelial cells a morphology that was strikingly similar to that of spindle cells present in KS lesions. Taken together, these data, demonstrating that ORF74 activates NF-κB and induces the expression of proangiogenic and proinflammatory factors, suggest that expression of ORF74 in a minority of cells in KS lesions could influence uninfected cells or latently infected cells via autocrine and paracrine mechanisms, thereby contributing to KS pathogenesis.

Human herpesvirus 8 genoprevalence in populations at disparate risks of Kaposi's sarcoma

2006 ◽  
Vol 79 (1) ◽  
pp. 52-59 ◽  
Author(s):  
Navdeep Kumar ◽  
Ken McLean ◽  
Naoki Inoue ◽  
David R. Moles ◽  
Crispian Scully ◽  
...  
Keyword(s):  
Kaposi's Sarcoma ◽  
Human Herpesvirus ◽  
Kaposi’S Sarcoma ◽  
Human Herpesvirus 8 ◽  
Herpesvirus 8
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