Characteristics of B-Cell Lymphomas in HIV/HCV-Coinfected Patients During the Combined Antiretroviral Therapy Era
ABSTRACT Hepatitis C virus (HCV) infection is frequent among HIV infected patients. We describe the characteristics of 6 HIV-HCV coinfected patients with B-cell non-Hodgkin lymphoma (NHL) included in a prospective cohort study of HIV related lymphomas. Five of the six cases had features of marginal zone/lymphoplasmacytic NHL versus one out of 33 HIV only infected patients. Remarkably, anti-HCV treatment led to a hematological response in a patient with splenic marginal zone lymphoma. This supports the role of chronic antigenic stimulation by HCV on lymphomagenesis and further evaluation of HCV antiviral therapy in coinfected patients with NHL.
JAIDS Journal of Acquired Immune Deficiency Syndromes 05/2014; DOI:10.1097/QAI.0000000000000204 · 4.39 Impact Factor
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ABSTRACT: Previous studies suggest that active selection limits the number of HIV-1 variants acquired by a newly infected individual from the diverse variants circulating in the transmitting partner. We compared HIV-1 envelopes from 9 newly infected subjects and their linked transmitting partner to explore potential mechanisms for selection. Recipient virus envelopes had significant genotypic differences compared to those present in the transmitting partner. Recombinant viruses incorporating pools of recipient and transmitter envelopes showed no significant difference in their sensitivity to receptor and fusion inhibitors, suggesting they had relatively similar entry capacity in the presence of low CD4 and CCR5 levels. Aggregate results in primary cells from up to 4 different blood or skin donors showed that viruses with envelopes from the transmitting partner as compared to recipient envelopes replicated more efficiently in CD4+ T cells, monocyte derived dendritic cell (MDDC) - CD4+ T cell co-cultures, Langerhans cells (LCs) - CD4+ T cell co-cultures and CD4+ T cells expressing high levels of the gut homing receptor, alpha4beta7, and demonstrated greater binding to alpha4beta7 high / CD8+ T cells. These transmitter versus recipient envelope virus phenotypic differences, however, were not always consistent among the primary cells from all the different blood or skin donation volunteers. Although genotypically unique variants are present in newly infected individuals compared to the diverse swarm circulating in the chronically infected transmitting partner, replication in potential early target cells and receptor utilization either do not completely dictate this genetic selection, or these potential transmission phenotypes are lost very soon after HIV-1 acquisition.Retrovirology 12/2013; 10(1):162. DOI:10.1186/1742-4690-10-162 · 4.77 Impact Factor