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Stable indicator cell lines exhibiting HIV-1 tat function
L T Bacheler1, L L Strehl, R H Neubauer
1Medical Products Department, E.I. du Pont de Nemours & Co., Inc., Wilmington, DE 19880-0400.
AIDS Research and Human Retroviruses
|June 1, 1989
Summary
Researchers developed a new HIV tat transactivation assay using stable cell lines. This virus-free system enables high-capacity screening of compounds to combat HIV infection.
Area of Science:
- Virology
- Molecular Biology
- Drug Discovery
Background:
- The human immunodeficiency virus (HIV) tat protein is crucial for viral replication and represents a key therapeutic target.
- Developing efficient screening systems is vital for identifying novel anti-HIV compounds.
Purpose of the Study:
- To establish a robust, virus-free cell-based assay for screening compounds that inhibit HIV tat transactivation.
- To leverage stable cell lines for high-throughput screening of potential HIV therapeutics.
Main Methods:
- Generation of stable human cell lines expressing beta-galactosidase under the control of the HIV-1 long terminal repeat (LTR) and tat gene.
- Quantification of beta-galactosidase enzymatic activity using spectrophotometry in microtiter plate formats.
- Utilizing a virus-free system for assessing tat-mediated transactivation.
Main Results:
- The engineered cell lines demonstrated a 1000-fold induction of gene expression mediated by the HIV tat protein.
- High sensitivity achieved, allowing detection from fewer than 5000 cells per well.
- The system proved effective for rapid, spectrophotometric quantitation of enzymatic activity.
Conclusions:
- Stable cell lines provide a reliable and efficient platform for high-capacity screening of compounds targeting HIV tat.
- This virus-free assay facilitates the discovery of novel therapeutic interventions for HIV infection.
- The system's sensitivity and throughput support drug discovery efforts against HIV transactivation mechanisms.