scholarly journals Increased levels of serum intercellular adhesion molecule 1 in hemophiliacs irrespective of human immunodeficiency virus type 1 infection [letter]

Blood ◽  
1993 ◽  
Vol 82 (7) ◽  
pp. 2258-2259 ◽  
Author(s):  
J Matsuda ◽  
M Tsukamoto ◽  
M Gotoh ◽  
K Gohchi ◽  
N Saitoh ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Adhesion Molecule ◽  
Intercellular Adhesion ◽  
Intercellular Adhesion Molecule ◽  
Intercellular Adhesion Molecule 1 ◽  
Immunodeficiency Virus

scholarly journals Statin Compounds Reduce Human Immunodeficiency Virus Type 1 Replication by Preventing the Interaction between Virion-Associated Host Intercellular Adhesion Molecule 1 and Its Natural Cell Surface Ligand LFA-1

2004 ◽  
Vol 78 (21) ◽  
pp. 12062-12065 ◽  
Author(s):  
Jean-François Giguère ◽  
Michel J. Tremblay
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Adhesion Molecule ◽  
Intercellular Adhesion ◽  
Intercellular Adhesion Molecule ◽  
Intercellular Adhesion Molecule 1 ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT A variety of host factors, including membrane proteins acquired by human immunodeficiency virus type 1 (HIV-1), play a dominant role in HIV-1 adsorption onto host cells. Examples include the integrin intercellular adhesion molecule 1 (ICAM-1), which, once acquired by HIV-1, promotes virus infectivity via ligation to LFA-1. We tested the ability of statins to diminish HIV-1 replication, based on the idea that these compounds have been shown to block ICAM-1-LFA-1 interactions. Our data indicate that statins diminish HIV-1 attachment to target cells by suppressing ICAM-1-LFA-1 interactions. The capacity of statins to limit the initial steps in virus replication could represent an interesting approach for the treatment of HIV-1 infection.

scholarly journals Interaction between the Cytoplasmic Domain of ICAM-1 and Pr55Gag Leads to Acquisition of Host ICAM-1 by Human Immunodeficiency Virus Type 1

2004 ◽  
Vol 78 (21) ◽  
pp. 11916-11925 ◽  
Author(s):  
Yannick Beauséjour ◽  
Michel J. Tremblay
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Adhesion Molecule ◽  
Cytoplasmic Domain ◽  
Virus Infectivity ◽  
Immunodeficiency Virus ◽  
Selective Incorporation ◽  
Hiv 1

ABSTRACT We have examined the molecular basis for the selective incorporation of the adhesion molecule ICAM-1 within human immunodeficiency virus type 1 (HIV-1). The process of ICAM-1 incorporation was investigated by using different ICAM-1 constructs in combination with virus capture and immunoprecipitation studies, Western blot and confocal microscopy analyses, and infectivity assays. Experiments conducted with viruses bearing a truncated version of ICAM-1 revealed that the cytoplasmic domain of ICAM-1 governs insertion of this adhesion molecule into HIV-1. Further experiments suggested that there is an association between ICAM-1 and the virus-encoded Pr55Gag polyprotein. This study represents the first demonstration that structural Gag polyproteins play a key role in the uptake of a host-derived cell surface by the virus entity. Taken together, our results indicate that interactions between viral and cellular proteins are responsible for the selective uptake of host ICAM-1 by HIV-1. This observation describes a new strategy by which HIV-1 can modulate its replicative cycle, considering that insertion of ICAM-1 within nascent virions has been shown to increase virus infectivity.

scholarly journals Human Seminal Plasma Abrogates the Capture and Transmission of Human Immunodeficiency Virus Type 1 to CD4+ T Cells Mediated by DC-SIGN

2007 ◽  
Vol 81 (24) ◽  
pp. 13723-13734 ◽  
Author(s):  
Juan Sabatté ◽  
Ana Ceballos ◽  
Silvina Raiden ◽  
Mónica Vermeulen ◽  
Karen Nahmod ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Seminal Plasma ◽  
Intercellular Adhesion Molecule ◽  
Target Cells ◽  
Human Seminal Plasma ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT Dendritic cell-specific intercellular adhesion molecule 3-grabbing nonintegrin (DC-SIGN) is expressed by dendritic cells (DCs) at mucosal surfaces and appears to play an important role in the dissemination of human immunodeficiency virus type 1 (HIV-1) infection. DC-SIGN binds HIV-1 gp120 and efficiently transmits the virus to T CD4+ cells, which become the center of viral replication. Semen represents the main vector for HIV-1 dissemination worldwide. In the present study we show that human seminal plasma (SP), even when used at very high dilutions (1:104 to 1:105), markedly inhibits the capture and transmission of HIV-1 to T CD4+ cells mediated by both DCs and B-THP-1-DC-SIGN cells. In contrast, SP does not inhibit the capture of HIV-1 by DC-SIGN-negative target cells, such as the T-cell line SupT-1, monocytes, and activated peripheral blood mononuclear cells. The SP inhibitor has a high molecular mass (>100 kDa) and directly interacts with DC-SIGN-positive target cells but not with HIV-1. Moreover, the inhibitor binds to concanavalin A, suggesting that it contains high-mannose N-linked carbohydrates. Of note, using biotin-labeled SP we found that the binding of SP components to DCs was abrogated by mannan, while their interaction with B-THP-1 cells was almost completely dependent on the expression of DC-SIGN. Since epithelium integrity is often compromised after vaginal or anal intercourse, as well as in the presence of ulcerative-sexually transmitted diseases, our results support the notion that components of the SP might be able to access to the subepithelium, inhibiting the recognition of HIV-1 gp120 by DC-SIGN-positive DCs.

scholarly journals Binding of LFA-1 (CD11a) to Intercellular Adhesion Molecule 3 (ICAM-3; CD50) and ICAM-2 (CD102) Triggers Transmigration of Human Immunodeficiency Virus Type 1-Infected Monocytes through Mucosal Epithelial Cells

2002 ◽  
Vol 76 (1) ◽  
pp. 32-40 ◽  
Author(s):  
Marie-Paule Carreno ◽  
Nicolas Chomont ◽  
Michel D. Kazatchkine ◽  
Theano Irinopoulou ◽  
Corrine Krief ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Epithelial Cells ◽  
Adhesion Molecule ◽  
Mononuclear Cells ◽  
Sexual Transmission ◽  
Intercellular Adhesion ◽  
Intercellular Adhesion Molecule ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT Transmigration of human immunodeficiency virus (HIV)-infected mononuclear cells through the genital mucosa is one of the possible mechanisms of sexual transmission of HIV. Here, we investigated the transmigration of cell-associated R5-tropic HIV type 1 (HIV-1) through a tight monolayer of human epithelial cells in vitro. We show that this process is dependent on an initial interaction between αLβ2 integrin CD11a/CD18 on infected monocytic cells and intercellular adhesion molecule 2 (ICAM-2; CD102) and ICAM-3 (CD50) on the apical membrane of epithelial cells. The CD50 and CD102 ligands were overexpressed on epithelial cells when the cells were activated by proinflammatory cytokines in the cellular microenvironment. An accumulation of proviral DNA was found in the transmigrated cells, clearly reflecting the preferential transepithelial migration of HIV-1-infected cells under proinflammatory conditions. Our observations provide new insights supporting the hypothesis that HIV-infected mononuclear cells contained in genital secretions from infected individuals may cross the epithelial genital mucosa of an exposed receptive sexual partner, particularly under inflammatory conditions of damaged genital tissue. Understanding the fundamental aspects of the initial HIV entry process during sexual transmission remains a critical step for preventing human infection and developing further vaccinal strategies and virucidal agents.

scholarly journals Intercellular Adhesion Molecule 1 (ICAM-1), but Not ICAM-2 and -3, Is Important for Dendritic Cell-Mediated Human Immunodeficiency Virus Type 1 Transmission

2009 ◽  
Vol 83 (9) ◽  
pp. 4195-4204 ◽  
Author(s):  
Jian-Hua Wang ◽  
Constance Kwas ◽  
Li Wu
Keyword(s):  
Human Immunodeficiency Virus ◽  
T Cells ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Intercellular Adhesion ◽  
Target Cells ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT Dendritic cells (DCs) play a critical role in cell-to-cell-mediated transmission of human immunodeficiency virus type 1 (HIV-1). Interactions between intercellular adhesion molecules (ICAMs) and their ligands facilitate DC-T-cell contact. The interaction between ICAM-1 on DCs and leukocyte function-associated molecule 1 (LFA-1) on CD4+ T cells has been proposed to be important for DC-mediated HIV-1 transmission. Given that DCs and T cells express multiple ICAMs and binding ligands, the relative importance of ICAMs in DC-mediated HIV-1 transmission remains to be defined. Here, we examine the role of ICAM-1, -2, and -3 in DC-mediated HIV-1 transmission to various types of target cells including primary CD4+ T cells. The expression levels of ICAMs and their ligands on immature and mature DCs and various types of HIV-1 target cells were measured by flow cytometry. Blocking ICAM-1 in DCs with specific monoclonal antibodies and small interfering RNA impaired DC-mediated HIV-1 transmission. DC-mediated viral transmission was significantly inhibited when both ICAM-1 on DCs and LFA-1 on CD4+ T cells were blocked. However, blockade of ICAM-1 on target cells did not significantly inhibit DC-mediated HIV-1 transmission. Ectopic expression and antibody blocking suggest that DC-mediated HIV-1 transmission to primary CD4+ T cells is independent of ICAM-2 and ICAM-3. Taken together, our data clarified the role of ICAMs in DC-mediated HIV-1 transmission to CD4+ T cells.

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