title: Cross-clade inhibition of human immunodeficiency virus type 1 primary isolates by monoclonal anti-CD4.
abstract: A murine monoclonal antibody (MAb) with human CD4 specificity was tested for the ability to inhibit primary human immunodeficiency virus type 1 (HIV-1) isolates clades A through E. Human peripheral blood mononuclear cells (PBMC) were used as target cells for infectivity. The HIV-1 primary isolates were examined for the capacity to infect PBMC targets in the presence or absence of the anti-CD4 MAb, designated P1. P1 broadly inhibited clade A, C, D, and E isolates, based on a reduction of HIV-1 p24 antigen concentrations compared with untreated controls. Little to no virus-inhibiting activity was observed with a primary HIV-1 clade B isolate, designated BZ167. Additionally, a second primary clade B isolate was efficiently inhibited from infecting PBMC targets by P1. The data indicate that P1 exhibits group-specific inhibiting activity against non-clade B primary HIV-1 isolates in vitro.
authors.affiliation: Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City 73190, USA.
authors.forename: M H
authors.initials: MH
authors.lastname: Shearer
authors.forename: D K
authors.initials: DK
authors.lastname: Timanus
authors.forename: P A
authors.initials: PA
authors.lastname: Benton
authors.forename: D R
authors.initials: DR
authors.lastname: Lee
authors.forename: R C
authors.initials: RC
authors.lastname: Kennedy
mesh_terms: D000818:Animals; D019380:Anti-HIV Agents / Q000494:pharmacology*; D000911:Antibodies, Monoclonal / Q000276:immunology / Q000494:pharmacology*; D015704:CD4 Antigens / Q000276:immunology*; D002470:Cell Survival; D016655:HIV Core Protein p24 / Q000032:analysis; D015497:HIV-1 / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology; D006801:Humans; D007700:Kinetics; D007963:Leukocytes, Mononuclear / Q000187:drug effects; D051379:Mice; D014779:Virus Replication
chemical_list: D019380:Anti-HIV Agents; D000911:Antibodies, Monoclonal; D015704:CD4 Antigens; D016655:HIV Core Protein p24