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Updated: Apr 23, 2026
Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
Published on: March 27, 2020
High-throughput screening identifies compounds that enhance lentiviral transduction.
J M Johnston1, G Denning2, R Moot1
11] Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA [2] Graduate Program in Molecular and Systems Pharmacology, Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, GA, USA.
Researchers screened compounds to improve gene therapy. Phorbol 12-myristate 13-acetate (PMA) significantly enhanced lentiviral vector transduction in hematopoietic stem cells, offering a new method for gene manipulation.
Area of Science:
- Gene Therapy
- Molecular Biology
- Biotechnology
Background:
- Hematopoietic stem cell (HSC) gene therapy requires efficient genetic modification.
- Current methods face challenges in increasing HSC susceptibility to lentiviral vectors.
Purpose of the Study:
- To identify compounds that enhance lentiviral vector transduction efficiency in target cells.
- To find novel enhancers for ex vivo genetic manipulation of HSCs.
Main Methods:
- A high-throughput screen of 1280 compounds was performed using the K562 cell line.
- Lentiviral vectors encoding GFP and fVIII were used to assess transduction enhancement.
- The effect of identified compounds on human bone marrow-derived CD34(+) cells was evaluated.
Main Results:
- 30 compounds enhanced viral transduction, including known enhancers and phorbol 12-myristate 13-acetate (PMA).
- PMA increased GFP expression in K562 cells over fourfold and fVIII transduction fourfold.
- PMA enhanced transduction of human CD34(+) cells from 7% to over 22% without affecting cell viability or hematopoietic marker expression.
Conclusions:
- High-throughput screening is effective for identifying lentiviral transduction enhancers.
- PMA is a novel and potent enhancer of lentiviral transduction in human CD34(+) cells.
- PMA shows potential for improving lentiviral gene therapy strategies involving HSCs.
