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Updated: Dec 24, 2025
Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
Published on: March 27, 2020
Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a
1Department of Molecular & Cellular Physiology, Albany Medical College.
Abstract:
Transcription factors can alter the expression of numerous target genes that influence a variety of downstream processes making them good targets for anti-cancer therapies. However, directly targeting transcription factors is often difficult and can cause adverse side effects if the transcription factor is necessary in one or more adult tissues. Identifying upstream regulators that aberrantly activate transcription factors in cancer cells offers a more feasible alternative, particularly if these proteins are easy to drug. Here, we describe a protocol that can be used to combine arrayed medium-scale lentiviral libraries and a dual-luciferase-based transcriptional reporter assay to identify novel regulators of transcription factors in cancer cells. Our approach offers a quick, easy, and inexpensive way to test hundreds of genes in a single experiment. To demonstrate the use of this approach, we performed a screen of an arrayed lentiviral RNAi library containing several regulators of Yes-associated protein (YAP) and transcriptional co-activator with PDZ-binding motif (TAZ), two transcriptional co-activators that are the downstream effectors of the Hippo pathway. However, this approach could be modified to screen for regulators of virtually any transcription factor or co-factor and could also be used to screen CRISPR/CAS9, cDNA, or ORF libraries.
Insights
Researchers developed a novel method using lentiviral libraries and reporter assays to find new regulators of transcription factors in cancer. This approach efficiently identifies potential drug targets for anti-cancer therapies by screening hundreds of genes quickly and affordably.
Area of Science:
- Molecular Biology
- Cancer Research
- Drug Discovery
Background:
- Transcription factors regulate gene expression and are crucial in cancer development.
- Directly targeting transcription factors for cancer therapy is challenging due to potential side effects.
- Identifying upstream regulators offers a more feasible therapeutic strategy.
Purpose of the Study:
- To present a protocol for identifying novel regulators of transcription factors in cancer cells.
- To enable efficient screening of potential therapeutic targets.
- To offer a quick, easy, and inexpensive method for gene screening.
Main Methods:
- Combining arrayed medium-scale lentiviral libraries with a dual-luciferase-based transcriptional reporter assay.
- Screening lentiviral RNAi libraries to identify regulators of specific transcription factors.
- Utilizing a high-throughput screening approach for gene discovery.
Main Results:
- Demonstrated the protocol's efficacy by screening regulators of Yes-associated protein (YAP) and transcriptional co-activator with PDZ-binding motif (TAZ).
- Successfully identified novel regulators within the tested libraries.
- Validated the protocol's ability to test hundreds of genes in a single experiment.
Conclusions:
- The described protocol provides an efficient and cost-effective method for discovering novel transcription factor regulators in cancer.
- This approach can be adapted to screen various libraries (e.g., CRISPR/CAS9, cDNA, ORF) for different transcription factors.
- The identified regulators represent potential targets for developing new anti-cancer therapies.
