title: Increased HIV-1 production in chronically infected H9 cells grown in protein-free medium.
abstract: Human T cell line H9 was established in a protein-free 1:1 mixture of Ham's F-12 and IMDM. After 230 passages (3 years) in protein-free medium, the cells designated H9-PF were infected with HIV-1. The infectivity titers of HIV-1 in cell culture medium were monitored by determining the median tissue culture infectious doses (TCID50). Additionally, the production of viral antigen in cells was measured by an immunoenzymatical alkaline phosphatase anti-alkaline phosphatase (APAAP) method using a monoclonal antibody against HIV-1-p24 antigen. In acutely infected H9-PF and H9 cultures similar TCID50 values and percentage of cells positive for p24 antigen were found. In contrast, both TCID50 values and percentage of cells positive for p24 antigen were by far greater in chronically infected H9-PF than in H9 cultures.
authors.affiliation: Department of Medical Virology, J. W. Goethe University, Frankfurt a. M., Federal Republic of Germany.
authors.forename: J
authors.initials: J
authors.lastname: Cinatl
authors.forename: J
authors.initials: J
authors.lastname: Cinatl
authors.forename: H
authors.initials: H
authors.lastname: Rabenau
authors.forename: U
authors.initials: U
authors.lastname: Ebener
authors.forename: B
authors.initials: B
authors.lastname: Kornhuber
authors.forename: H W
authors.initials: HW
authors.lastname: Doerr
mesh_terms: D002460:Cell Line; D003470:Culture Media; D015497:HIV-1 / Q000254:growth & development*; D014776:Virus Cultivation
chemical_list: D003470:Culture Media