[High throughput screening method of potassium channel regulators].

Area of Science:

• Pharmacology
• Neuroscience
• Biochemistry

Context:

• Potassium channels are crucial for regulating cell membrane potential.
• Discovering novel potassium channel modulators is essential for treating various diseases.
• High-throughput screening (HTS) methods are vital for accelerating drug discovery.

Purpose:

• To establish and validate a novel, cost-effective, and repeatable in vitro fluorescence assay for high-throughput screening of potassium channel regulators.
• To utilize the DiBAC4(3) fluorescence assay to screen a library of compounds for their effects on potassium channel activity.
• To identify novel compounds that modulate potassium channel function for potential therapeutic applications.

Summary:

• A cell-based 96-well fluorescence assay using DiBAC4(3) was developed in PC12 cells to measure membrane potential changes.
• The assay successfully detected responses to known potassium channel blockers and openers, with several compounds showing concentration-dependent effects.
• Out of 76 screened compounds, nine demonstrated dose-dependent fluorescence changes, indicating their potential as potassium channel regulators, requiring further validation with patch clamp techniques.

Impact:

• Provides a robust and economical HTS platform for identifying new potassium channel modulators.
• Facilitates the discovery of novel therapeutic agents targeting conditions associated with potassium channel dysfunction.
• Accelerates the drug discovery pipeline for neurological, cardiovascular, and other diseases linked to potassium channel activity.