Selection of Leptin Surrogates by a General Phenotypic Screening Method for Receptor Agonists

Area of Science:

• Biochemistry
• Molecular Biology
• Drug Discovery

Background:

• High demand exists for agonist biomolecules like cytokine surrogates in research.
• Current methods for identifying these molecules are inefficient and limited.
• Need for high-throughput, cost-effective screening methods is critical.

Purpose of the Study:

• Introduce a novel phenotypic screening method: biological receptor activation-dependent cell survival (BRADS).
• Demonstrate BRADS's effectiveness in identifying functional agonist biomolecules.
• Validate BRADS's applicability for various biological receptors.

Main Methods:

• Implemented a phenotypic screening approach based on cell survival dependent on receptor activation.
• Utilized BRADS for high-throughput screening of molecular libraries.
• Conducted a proof-of-concept study to identify a human leptin surrogate.

Main Results:

• Successfully identified a functional surrogate for human leptin.
• The BRADS method proved to be high-throughput, low-background, and cost-effective.
• The identified surrogate effectively mimicked native human leptin activity in assays.

Conclusions:

• BRADS is an effective and accessible method for identifying agonist biomolecules.
• The method requires minimal specialized equipment, making it widely applicable.
• BRADS shows potential for screening a broad range of receptors, including Notch and GPCRs.