Human T-cell line infected with HIV-2 which secretes a protein corresponding to native HIV-2 gp160 in an extracellular medium
US5736317A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2740/16122
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A novel cell line chronically infected with HIV-2.sub.NIHZ virus secretes the precursor of the viral envelope proteins in extracellular medium. The cells grow well in serum-free medium which enables the concentration of the conditioned medium of the cells to be greatly increased (>100 fold). Such a concentration step is otherwise impossible to achieve if the cells are grown under conventional conditions using 10% fetal calf serum. A specific affinity procedure is provided to purify the gp160 protein from the concentrated conditioned medium of cultures of 100 liter batches using a mouse monoclonal antibody to the HIV-2 gp41 protein, which is a part of the gp160 protein. This purified HIV-2 gp160 reacts with high specificity and sensitivity with the anti viral antibodies of HIV-2 infected humans by several criteria such as i) ELISA, ii) western blot analysis, and iii) radioimmunoprecipitation of metabolically labeled gp160 from the same cell line. The purified HIV-2 gp160 from this cell line is therefore a diagnostic tool for the detection of HIV-2 infection in humans. In view of the predicted oligomeric property of gp160 and its close conformational similarity to the virion envelope…
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