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Discovery of small molecule human FPR1 receptor antagonists
John Unitt1, Malbinder Fagura, Tim Phillips
1AstraZeneca R&D Charnwood, Bioscience, Bakewell Road, Loughborough LE11 5RH, UK.
Two novel series of formyl peptide receptor 1 (FPR1) antagonists were identified. These compounds selectively inhibit FPR1 activity in human neutrophils, serving as valuable research tools.
Area of Science:
- Medicinal Chemistry
- Immunology
- Pharmacology
Background:
- Formyl peptide receptors (FPRs) are key mediators of inflammatory responses.
- FPR1 is a critical target for modulating neutrophil activity in various diseases.
- Developing selective FPR1 antagonists is crucial for therapeutic and research applications.
Purpose of the Study:
- To report the discovery and characterization of novel formyl peptide receptor 1 (FPR1) antagonists.
- To evaluate the specificity and functional activity of these novel compounds against FPR1.
- To establish the utility of these antagonists as in vitro validation tools for FPR1.
Main Methods:
- Synthesis of two novel chemical series: methionine benzimidazole 6 and diamide 7.
- Assessment of binding inhibition using labelled fMLF and human recombinant FPR1 (hrFPR1).
- Functional assays in human neutrophils to determine selective FPR1 antagonism.
Main Results:
- Identification of two distinct series of FPR1 antagonists.
- Demonstrated specific inhibition of labelled fMLF binding to hrFPR1 by both series.
- Selective antagonism of FPR1 function observed in human neutrophils.
Conclusions:
- Methionine benzimidazole 6 and diamide 7 represent novel classes of FPR1 antagonists.
- These compounds exhibit high specificity for FPR1, validated in both binding and functional assays.
- The identified antagonists are valuable tools for in vitro research and validation of FPR1 as a therapeutic target.
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