Related Experiment Videos
Novel Tat-encoding bicistronic human immunodeficiency virus type 1-based gene transfer vectors for high-level
N Srinivasakumar1, F Schuening
1Division of Hematology-Oncology, Department of Medicine, Vanderbilt University, Nashville, Tennessee 37232-6305, USA. narasimhachar.srinivasakumar@mcmail.vanderbilt.edu
Journal of Virology
|June 23, 2000
Summary
New gene transfer vectors based on human immunodeficiency virus type 1 (HIV-1) encoding Tat72 showed improved performance. These Rev-independent vectors offer efficient transduction and high transgene expression, serving as a viable alternative to existing HIV-1 vectors.
Area of Science:
- Molecular Biology
- Virology
- Gene Therapy
Background:
- Human immunodeficiency virus type 1 (HIV-1) vectors are crucial for gene transfer.
- Tat protein is essential for HIV-1 replication and gene expression.
- Developing efficient and independent gene transfer systems is a key challenge.
Purpose of the Study:
- To develop novel bicistronic gene transfer vectors encoding single-exon Tat (Tat72) and full-length Tat (Tat86).
- To create Rev-independent vectors utilizing the constitutive transport element (CTE) from Mason-Pfizer monkey virus (MPMV).
- To compare the gene transfer efficiency and transgene expression levels of these novel vectors.
Main Methods:
- Construction of bicistronic vectors encoding Tat72 and Tat86 based on HIV-1.
- Incorporation of CTE from MPMV to achieve Rev independence.
- Gene transfer experiments in various cell types.
- Comparison of transgene expression with simian cytomegalovirus immediate-early and simian virus 40 early promoters.
Main Results:
- Tat72-encoding vectors demonstrated superior performance compared to Tat86-expressing vectors.
- CTE-containing Rev-independent vectors achieved gene transfer efficiencies comparable to Rev-dependent systems.
- Tat72 vectors showed efficient transduction across diverse cell types.
- Higher transgene expression levels were observed with Tat72 vectors compared to vectors using standard promoters.
Conclusions:
- Bicistronic, single-exon Tat72-encoding HIV-1 vectors are effective for gene transfer.
- Rev-independent vectors utilizing CTE offer comparable efficiency to traditional systems.
- Tat72 vectors provide a promising alternative to HIV-1 vectors with internal promoters due to enhanced transduction and expression.