title: ICAM-3 influences human immunodeficiency virus type 1 replication in CD4(+) T cells independent of DC-SIGN-mediated transmission.
abstract: We investigated the role of ICAM-3 in DC-SIGN-mediated human immunodeficiency virus (HIV) infection of CD4(+) T cells. Our results demonstrate that ICAM-3 does not appear to play a role in DC-SIGN-mediated infection of CD4(+) T cells as virus is transmitted equally to ICAM-3(+) or ICAM-3(-) Jurkat T cells. However, HIV-1 replication is enhanced in ICAM-3(-) cells, suggesting that ICAM-3 may limit HIV-1 replication. Similar results were obtained when SIV replication was examined in ICAM-3(+) and ICAM-3(-) CEMx174 cells. Furthermore, while ICAM-3 has been proposed to play a co-stimulatory role in T cell activation, DC-SIGN expression on antigen presenting cells did not enhance antigen-dependent activation of T cells. Together, these data indicate that while ICAM-3 may influence HIV-1 replication, it does so independent of DC-SIGN-mediated virus transmission or activation of CD4(+) T cells.
authors: Department of Molecular Virology and Microbiology, BCM385, Room 811D, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
authors: Julia E
authors: JE
authors: Biggins
authors: Tasha
authors: T
authors: Biesinger
authors: Monica T
authors: MT
authors: Yu Kimata
authors: Reetakshi
authors: R
authors: Arora
authors: Jason T
authors: JT
authors: Kimata
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000235:genetics / Q000502:physiology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000821:virology; D015815:Cell Adhesion Molecules / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D002460:Cell Line; D015497:HIV-1 / Q000276:immunology / Q000472:pathogenicity / Q000502:physiology*; D006801:Humans; D019169:Jurkat Cells; D037181:Lectins, C-Type / Q000235:genetics / Q000502:physiology*; D008213:Lymphocyte Activation; D011956:Receptors, Cell Surface / Q000235:genetics / Q000502:physiology*; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D015302:Simian Immunodeficiency Virus / Q000472:pathogenicity / Q000502:physiology; D012995:Solubility; D014779:Virus Replication / Q000502:physiology; D000099215:DC-Specific ICAM-3 Grabbing Nonintegrin
chemical_list: D015703:Antigens, CD; D015815:Cell Adhesion Molecules; D037181:Lectins, C-Type; D011956:Receptors, Cell Surface; D011994:Recombinant Proteins; D000099215:DC-Specific ICAM-3 Grabbing Nonintegrin; C483616:ICAM3 protein, human