A Luciferase Reporter Gene System for High-Throughput Screening of γ-Globin Gene Activators

Area of Science:

• Biochemistry
• Molecular Biology
• Drug Discovery

Background:

• Luciferase reporter gene assays are valuable tools in drug discovery, offering high sensitivity and signal.
• Dual reporter gene systems allow for monitoring non-specific effects on gene expression by including both a gene of interest and a control gene.

Purpose of the Study:

• To develop and optimize a dual luciferase reporter gene assay for high-throughput screening (HTS).
• To identify potential drug candidates using the optimized assay and establish methods for hit triage.

Main Methods:

• Constructed a dual luciferase reporter system with synthetic γ-globin and β-globin gene promoters driving firefly and Renilla luciferase, respectively.
• Cloned a stable cell line and optimized critical assay parameters including cell density, serum concentration, and miniaturization.
• Performed HTS campaign and developed strategies to triage hits that interfere with firefly luciferase activity.

Main Results:

• Optimized assay conditions significantly enhanced robustness and sensitivity.
• Successfully completed HTS campaign, identifying approximately 1000 potential drug candidate hits.
• Established hit triage strategies to filter out non-specific modulators.

Conclusions:

• The optimized dual luciferase reporter assay is effective for sensitive and robust HTS in drug discovery.
• The developed assay and hit triage methods facilitate efficient identification of potential therapeutic agents.