Development of a p38 Kinase Binding Assay for High Throughput Screening

Area of Science:

• Biochemistry
• Pharmacology
• Molecular Biology

Background:

• p38 mitogen-activated protein kinase (MAPK) is crucial for inflammatory cytokine production.
• Pyridinyl imidazole compounds, like SB202190, are known selective p38 inhibitors.
• These inhibitors show efficacy in preclinical models of inflammatory conditions.

Purpose of the Study:

• To develop a robust assay for identifying novel p38 kinase inhibitors.
• To screen for small molecules that compete with pyridinyl imidazoles for p38 binding.
• To explore new therapeutic strategies for inflammatory diseases.

Main Methods:

• Development of a competitive filter binding assay.
• Utilized tritium-labeled SB202190 as the p38 kinase ligand.
• Expressed recombinant human p38 kinase in insect cells using baculovirus system.

Main Results:

• Successfully established a simple and robust assay for p38 kinase inhibitor screening.
• The assay measures the inhibition of tritium-labeled SB202190 binding to p38.
• The assay has been validated for screening chemical libraries.

Conclusions:

• The developed assay is effective for discovering new classes of p38 kinase inhibitors.
• This method facilitates the search for novel anti-inflammatory agents.
• Potential for identifying compounds to treat arthritis, bone resorption, and endotoxin shock.