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Molecular Pharmacology

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Research ArticleArticle

Identification of Novel Small-Molecule Agonists for Human Formyl Peptide Receptors and Pharmacophore Models of Their Recognition

Liliya N. Kirpotina, Andrei I. Khlebnikov, Igor A. Schepetkin, Richard D. Ye, Marie-Josèphe Rabiet, Mark A. Jutila and Mark T. Quinn
Molecular Pharmacology February 2010, 77 (2) 159-170; DOI: https://doi.org/10.1124/mol.109.060673
Liliya N. Kirpotina
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Andrei I. Khlebnikov
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Igor A. Schepetkin
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Richard D. Ye
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Marie-Josèphe Rabiet
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Mark A. Jutila
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Mark T. Quinn
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Abstract

N-formyl peptide receptor (FPR1) and N-formyl peptide receptor-like 1 (FPRL1, now known as FPR2) are G protein-coupled receptors involved in host defense and sensing cellular dysfunction. Because of the potential for FPR1/FPR2 as a therapeutic target, our recent high-throughput screening efforts have focused on the identification of unique nonpeptide agonists of FPR1/FPR2. In the present studies, we screened a chemolibrary of drug-like molecules for their ability to induce intracellular calcium mobilization in RBL-2H3 cells transfected with human FPR1 or FPR2. Screening of these compounds resulted in the identification of novel and potent agonists that activated both FPR1 and FPR2, as well as compounds that were specific for either FPR1 or FPR2 with EC50 values in the low micromolar range. Specificity of the compounds was supported by analysis of calcium mobilization in HL-60 cells transfected with human FPR1 and FPR2. In addition, all but one agonist activated intracellular calcium flux and chemotaxis in human neutrophils, irrespective of agonist specificity for FPR1 or FPR2. Molecular modeling of the group of FPR1 and FPR2 agonists using field point methodology allowed us to create pharmacophore models for ligand binding sites and formulate requirements for these specific N-formyl peptide receptor agonists. These studies further demonstrate that agonists of FPR1/FPR2 include compounds with wide chemical diversity and that analysis of such compounds can enhance our understanding of their ligand/receptor interaction.

Footnotes

  • ↵Embedded Image The online version of this article (available at http://molpharm.aspetjournals.org) contains supplemental material.

  • This work was supported in part by the National Institutes of Health National Center for Research Resources [Grant P20-RR020185]; the National Institutes of Health [Contract HHSN266200400009C]; an equipment grant from the M.J. Murdock Charitable Trust; and the Montana State University Agricultural Experimental Station.

  • Article, publication date, and citation information can be found at http://molpharm.aspetjournals.org.

    doi:10.1124/mol.109.060673.

  • ABBREVIATIONS:

    fMLF
    N-formyl-methionyl-leucyl-phenyalanine
    FPR
    formyl peptide receptor
    FPRL
    formyl peptide receptor like
    SAR
    structure-activity relationship
    DMSO
    dimethyl sulfoxide
    WKYMVm
    Trp-Lys-Tyr-Met-Val-d-Met
    HBSS−
    Hanks' balanced salt solution without Ca2+ and Mg2+
    HBSS+
    Hanks' balanced salt solution containing 10 mM HEPES and Ca2+ and Mg2+
    FBS
    fetal bovine serum
    ROS
    reactive oxygen species
    AG-14
    1,3-benzodioxolane-5-carboxylic acid 4′-benzyloxy-3′-methoxybenzylidene-hydrazide)
    1910-5441
    (3-benzyloxyphenyl)bis(5,5-dimethylcyclohexane-1,3-dione-2-yl)methane
    Bürli-25
    N-(4-bromophenyl)-N′-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)urea
    Frohn-11
    1-((5-methoxyindol-2-yl)carbonyl)-3-(2-ethylbenzimidazol-1-yl)(3R)pyrrolidine
    3570-0208
    7-acetoxy-6-ethyl-2-methyl-3-(1-methylbenzimidazol-2-yl)-4-oxo-4H-chromene
    BB-V-115
    N-(5-imidazo]1,2-a]pyrimidin-2-yl-2-methoxyphenyl)-isobutyramide
    24428242
    3-(2-chlorophenyl)-4-oxo-2-trifluoromethyl-4H-chromen-7-yl ester of thiophene-2-carboxylic acid
    796276
    2-[3-(4-methylpiperazin-1-yl)-6-oxo-6H-anthra[1,9-cd]isoxazol-5-ylamino]-ethyl ester of acetic acid.

  • Received August 31, 2009.
  • Accepted November 9, 2009.
  • Copyright © 2010 The American Society for Pharmacology and Experimental Therapeutics
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Molecular Pharmacology: 77 (2)
Molecular Pharmacology
Vol. 77, Issue 2
1 Feb 2010
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Research ArticleArticle

Identification of Novel Small-Molecule Agonists for Human Formyl Peptide Receptors and Pharmacophore Models of Their Recognition

Liliya N. Kirpotina, Andrei I. Khlebnikov, Igor A. Schepetkin, Richard D. Ye, Marie-Josèphe Rabiet, Mark A. Jutila and Mark T. Quinn
Molecular Pharmacology February 1, 2010, 77 (2) 159-170; DOI: https://doi.org/10.1124/mol.109.060673

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Research ArticleArticle

Identification of Novel Small-Molecule Agonists for Human Formyl Peptide Receptors and Pharmacophore Models of Their Recognition

Liliya N. Kirpotina, Andrei I. Khlebnikov, Igor A. Schepetkin, Richard D. Ye, Marie-Josèphe Rabiet, Mark A. Jutila and Mark T. Quinn
Molecular Pharmacology February 1, 2010, 77 (2) 159-170; DOI: https://doi.org/10.1124/mol.109.060673
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