title: Human peritoneal macrophages from ascitic fluid can be infected by a broad range of HIV-1 isolates.
abstract: Macrophages are major HIV target cells. They support both productive and latent HIV-1 infection. Susceptibility of primary macrophages to HIV depends on the anatomical location and activation state of the cells. We demonstrate that peritoneal macrophages (PMs) are abundant in ascitic fluid of patients with liver cirrhosis and are susceptible to HIV-1 infection. PMs expressed CD68, a differentiation marker, exhibited phagocytic activity, and survived in culture for 2 months without additional growth factors. Freshly isolated PMs were susceptible to HIV-1 R5 strains but not to X4-T-cell line-adapted strains. Interestingly, after 7 days in culture, PMs acquired susceptibility to X4-T-cell line-adapted strains. HIV entry inhibitors, TAK779 and AMD3100, blocked HIV infection of PMs, indicating that infection by R5 and X4 strains was mediated by CCR5 and CXCR4, respectively. Although PMs did not express detectable cell surface levels of CXCR4 and CCR5, they did express mRNAs of these HIV coreceptors and responded to stimulation by their natural ligands, SDF-1alpha and RANTES. PMs were susceptible to HIV-1 X4, R5, and X4R5 primary isolates. PMs after 7 days in culture produced greater amounts of X4 and X4R5 HIV than freshly isolated PMs. The day-7 PMs were more susceptible to R5 infection in a single-cycle infection assay, but there was no increase in viral production in a multiple-round infection assay. The level of CXCR4 mRNA and production of CC-chemokines (MIP-1alpha, MIP-1beta, and RANTES) increased significantly during 7 days in culture. Our results indicate that PMs are susceptible to receptor-mediated infection by a broad range of HIV strains. These primary macrophages could provide a valuable system for investigating the role of primary macrophages in HIV pathogenesis.
authors.affiliation: Department of Medicine, Division of Infectious Diseases, Mount Sinai School of Medicine, Box 1090, One Gustave L. Levy Place, New York, NY 10029, USA. theresa.chang@mssm.edu
authors.forename: Theresa L
authors.initials: TL
authors.lastname: Chang
authors.forename: Arielle
authors.initials: A
authors.lastname: Klepper
authors.forename: Jian
authors.initials: J
authors.lastname: Ding
authors.forename: John
authors.initials: J
authors.lastname: Garber
authors.forename: Aprille
authors.initials: A
authors.lastname: Rapista
authors.forename: Arevik
authors.initials: A
authors.lastname: Mosoian
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Hubner
authors.forename: Julio
authors.initials: J
authors.lastname: Gutierrez
authors.forename: Jose
authors.initials: J
authors.lastname: Walewski
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Abergel
authors.forename: Thomas
authors.initials: T
authors.lastname: Schiano
authors.forename: Andrea
authors.initials: A
authors.lastname: Branch
mesh_terms: D000577:Amides / Q000494:pharmacology; D015703:Antigens, CD / Q000032:analysis; D015214:Antigens, Differentiation, Myelomonocytic / Q000032:analysis; D001202:Ascitic Fluid / Q000166:cytology*; D001596:Benzylamines; D002478:Cells, Cultured; D000080027:Cyclams; D020869:Gene Expression Profiling; D023581:HIV Fusion Inhibitors / Q000494:pharmacology; D015497:HIV-1 / Q000254:growth & development* / Q000472:pathogenicity*; D006571:Heterocyclic Compounds / Q000494:pharmacology; D006801:Humans; D017737:Macrophages, Peritoneal / Q000737:chemistry / Q000821:virology*; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology; D019713:Receptors, CCR5 / Q000187:drug effects / Q000502:physiology; D019718:Receptors, CXCR4 / Q000187:drug effects / Q000502:physiology; D015728:Receptors, HIV / Q000187:drug effects / Q000502:physiology; D053586:Virus Internalization / Q000187:drug effects; D000097382:CD68 Molecule
chemical_list: D000577:Amides; D015703:Antigens, CD; D015214:Antigens, Differentiation, Myelomonocytic; D001596:Benzylamines; D000080027:Cyclams; D023581:HIV Fusion Inhibitors; D006571:Heterocyclic Compounds; D000644:Quaternary Ammonium Compounds; D019713:Receptors, CCR5; D019718:Receptors, CXCR4; D015728:Receptors, HIV; C067980:CD68 antigen, human; D000097382:CD68 Molecule; C527276:CXCR4 protein, human; C119369:TAK 779; C088327:plerixafor