title: Monocyte differentiation and HIV replication after prolonged culture of peripheral blood mononuclear cells from HIV-infected individuals.
abstract: Primary cultures of peripheral blood mononuclear cells (PBMC) from 51 HIV+ hemophiliac patients (HIV+ PBMC) were set up, allowing undisturbed cellular interaction in the absence of any exogenous stimuli. The optimum time for p24 detection was between 12 and 25 days. Infective virus was recovered from the culture supernatants (HIV+ SN) and the amount of p24 released ranged from 25 to 5300 pg/ml. Cells of the monocyte/macrophage (M/M) lineage were the main source of HIV in the HIV+ SN, as judged by intracellular staining of permeabilized cells with anti-p24 (KC57 monoclonal antibody) and flow cytometry analysis. M/M activation, differentiation, and proliferation occurred along the culture before the peak of in vitro HIV replication. Release of HIV p24 was highest in patients with >200 CD4+ T lymphocytes/mm3 who did not receive highly active antiretroviral therapy (HAART), but it was still detectable in 60-90% of patients who had responded to 1-2 years of HAART, reducing their plasma viral load to undetectable levels. It is proposed that this simple experimental system can be used to assess ongoing HIV infection of M/M with the patient's own viral variants.
authors.affiliation: Immunology Department, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina, Buenos Aires, 1425, Argentina.
authors.forename: B
authors.initials: B
authors.lastname: Ruibal-Ares
authors.forename: L
authors.initials: L
authors.lastname: Belmonte
authors.forename: P
authors.initials: P
authors.lastname: Baré
authors.forename: C
authors.initials: C
authors.lastname: Bayo-Hanza
authors.forename: G
authors.initials: G
authors.lastname: Mendez
authors.forename: R P
authors.initials: RP
authors.lastname: Bianco
authors.forename: M
authors.initials: M
authors.lastname: de Tezanos Pinto
authors.forename: M M
authors.initials: MM
authors.lastname: de Bracco
mesh_terms: D023241:Antiretroviral Therapy, Highly Active; D018929:Cell Culture Techniques / Q000379:methods*; D002454:Cell Differentiation; D002455:Cell Division; D002478:Cells, Cultured; D017077:Culture Media, Conditioned / Q000737:chemistry; D005260:Female; D006678:HIV / Q000254:growth & development / Q000302:isolation & purification*; D016655:HIV Core Protein p24 / Q000032:analysis; D015658:HIV Infections / Q000188:drug therapy / Q000276:immunology / Q000821:virology*; D006801:Humans; D019394:Ki-67 Antigen / Q000032:analysis; D007700:Kinetics; D008264:Macrophages / Q000737:chemistry / Q000166:cytology / Q000821:virology; D008297:Male; D009000:Monocytes / Q000737:chemistry / Q000166:cytology / Q000821:virology*; D014779:Virus Replication
chemical_list: D017077:Culture Media, Conditioned; D016655:HIV Core Protein p24; D019394:Ki-67 Antigen