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Schnute ME, Benoit SE, Buchler IP, Caspers N, Grapperhaus ML, Han S, Hotchandani R, Huang N, Hughes RO, Juba BM, Kim KH, Liu E, McCarthy E, Messing D, Miyashiro JS, Mohan S, O’Connell TN, Ohren JF, Parikh MD, Schmidt M, Selness SR, Springer JR, Thanabal V, Trujillo JI, Walker DP, Wan ZK, Withka JM, Wittwer AJ, Wood NL, Xing L, Zapf CW, Douhan J. Aminopyrazole Carboxamide Bruton's Tyrosine Kinase Inhibitors. Irreversible to Reversible Covalent Reactive Group Tuning. ACS Med Chem Lett 2019; 10:80-85. [PMID: 30655951 DOI: 10.1021/acsmedchemlett.8b00461] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 12/03/2018] [Indexed: 12/14/2022] Open
Abstract
Potent covalent inhibitors of Bruton's tyrosine kinase (BTK) based on an aminopyrazole carboxamide scaffold have been identified. Compared to acrylamide-based covalent reactive groups leading to irreversible protein adducts, cyanamide-based reversible-covalent inhibitors provided the highest combined BTK potency and EGFR selectivity. The cyanamide covalent mechanism with BTK was confirmed through enzyme kinetic, NMR, MS, and X-ray crystallographic studies. The lead cyanamide-based inhibitors demonstrated excellent kinome selectivity and rat pharmacokinetic properties.
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Affiliation(s)
| | | | | | - Nicole Caspers
- Medicine Design, Pfizer, Groton, Connecticut 06340, United States
| | | | - Seungil Han
- Medicine Design, Pfizer, Groton, Connecticut 06340, United States
| | | | | | | | | | | | | | | | | | | | | | | | - Jeffrey F. Ohren
- Medicine Design, Pfizer, Groton, Connecticut 06340, United States
| | - Mihir D. Parikh
- Medicine Design, Pfizer, Groton, Connecticut 06340, United States
| | | | | | | | | | - John I. Trujillo
- Medicine Design, Pfizer, Groton, Connecticut 06340, United States
| | | | | | - Jane M. Withka
- Medicine Design, Pfizer, Groton, Connecticut 06340, United States
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2
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Wang C, Hockerman S, Jacobsen EJ, Alippe Y, Selness SR, Hope HR, Hirsch JL, Mnich SJ, Saabye MJ, Hood WF, Bonar SL, Abu-Amer Y, Haimovich A, Hoffman HM, Monahan JB, Mbalaviele G. Selective inhibition of the p38α MAPK-MK2 axis inhibits inflammatory cues including inflammasome priming signals. J Exp Med 2018; 215:1315-1325. [PMID: 29549113 PMCID: PMC5940269 DOI: 10.1084/jem.20172063] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 01/13/2018] [Accepted: 02/22/2018] [Indexed: 01/02/2023] Open
Abstract
A unique p38α MAPK–MK2 pathway inhibitor, CDD-450, is used to uncover the function of this protein complex in inflammasome priming signals. Importantly, CDD-450 is as efficacious as global p38α MAPK inhibitors in decreasing inflammation in disease models. p38α activation of multiple effectors may underlie the failure of global p38α inhibitors in clinical trials. A unique inhibitor (CDD-450) was developed that selectively blocked p38α activation of the proinflammatory kinase MK2 while sparing p38α activation of PRAK and ATF2. Next, the hypothesis that the p38α–MK2 complex mediates inflammasome priming cues was tested. CDD-450 had no effect on NLRP3 expression, but it decreased IL-1β expression by promoting IL-1β mRNA degradation. Thus, IL-1β is regulated not only transcriptionally by NF-κB and posttranslationally by the inflammasomes but also posttranscriptionally by p38α–MK2. CDD-450 also accelerated TNF-α and IL-6 mRNA decay, inhibited inflammation in mice with cryopyrinopathy, and was as efficacious as global p38α inhibitors in attenuating arthritis in rats and cytokine expression by cells from patients with cryopyrinopathy and rheumatoid arthritis. These findings have clinical translation implications as CDD-450 offers the potential to avoid tachyphylaxis associated with global p38α inhibitors that may result from their inhibition of non-MK2 substrates involved in antiinflammatory and housekeeping responses.
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Affiliation(s)
- Chun Wang
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, MO
| | | | | | - Yael Alippe
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, MO
| | | | - Heidi R Hope
- Confluence Discovery Technologies, Inc., St. Louis, MO
| | | | | | | | | | - Sheri L Bonar
- Confluence Discovery Technologies, Inc., St. Louis, MO
| | - Yousef Abu-Amer
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO
| | - Ariela Haimovich
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
| | - Hal M Hoffman
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
| | | | - Gabriel Mbalaviele
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, MO
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3
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Xing L, Devadas B, Devraj RV, Selness SR, Shieh H, Walker JK, Mao M, Messing D, Samas B, Yang JZ, Anderson GD, Webb EG, Monahan JB. Discovery and characterization of atropisomer PH-797804, a p38 MAP kinase inhibitor, as a clinical drug candidate. ChemMedChem 2011; 7:273-80. [PMID: 22174080 DOI: 10.1002/cmdc.201100439] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 11/18/2011] [Indexed: 01/18/2023]
Abstract
PH-797804 ((aS)-3-{3-bromo-4-[(2,4-difluorobenzyl)oxy]-6-methyl-2-oxopyridin-1(2H)-yl}-N,4-dimethylbenzamde) is a diarylpyridinone inhibitor of p38 mitogen-activated protein (MAP) kinase derived from a racemic mixture as the more potent atropisomer (aS), first proposed by molecular modeling and subsequently confirmed by experiments. Due to steric constraints imposed by the pyridinone carbonyl group and the 6- and 6'-methyl substituents of PH-797804, rotation around the connecting bond of the pyridinone and the N-phenyl ring is restricted. Density functional theory predicts a remarkably high rotational energy barrier of >30 kcal mol(-1), corresponding to a half-life of more than one hundred years at room temperature. This gives rise to discrete conformational spaces for the N-phenylpyridinone group, and as a result, two atropic isomers that do not interconvert under ambient conditions. Molecular modeling studies predict that the two isomers should differ in their binding affinity for p38α kinase; whereas the atropic S (aS) isomer binds favorably, the opposite aR isomer incurs significant steric interference with p38α kinase. The two isomers were subsequently identified and separated by chiral chromatography. IC50 values from p38α kinase assays confirm that one atropisomer is >100-fold more potent than the other. It was ultimately confirmed by small-molecule X-ray diffraction that the more potent atropisomer, PH-797804, is the aS isomer of the racemic pair. Extensive pharmacological characterization supports that PH-797804 carries most activity both in vitro and in vivo, and it has a stability profile compatible with oral formulation and delivery options.
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Affiliation(s)
- Li Xing
- Inflammation/Immunology Chemistry, Pfizer Worldwide Research and Development, 200 CambridgePark Drive, Cambridge, MA 02421, USA.
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4
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Selness SR, Boehm TL, Walker JK, Devadas B, Durley RC, Kurumbail R, Shieh H, Xing L, Hepperle M, Rucker PV, Jerome KD, Benson AG, Marrufo LD, Madsen HM, Hitchcock J, Owen TJ, Christie L, Promo MA, Hickory BS, Alvira E, Naing W, Blevis-Bal R, Devraj RV, Messing D, Schindler JF, Hirsch J, Saabye M, Bonar S, Webb E, Anderson G, Monahan JB. Design, synthesis and activity of a potent, selective series of N -aryl pyridinone inhibitors of p38 kinase. Bioorg Med Chem Lett 2011; 21:4059-65. [DOI: 10.1016/j.bmcl.2011.04.120] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 04/23/2011] [Accepted: 04/26/2011] [Indexed: 10/18/2022]
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5
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Selness SR, Devraj RV, Devadas B, Walker JK, Boehm TL, Durley RC, Shieh H, Xing L, Rucker PV, Jerome KD, Benson AG, Marrufo LD, Madsen HM, Hitchcock J, Owen TJ, Christie L, Promo MA, Hickory BS, Alvira E, Naing W, Blevis-Bal R, Messing D, Yang J, Mao MK, Yalamanchili G, Vonder Embse R, Hirsch J, Saabye M, Bonar S, Webb E, Anderson G, Monahan JB. Discovery of PH-797804, a highly selective and potent inhibitor of p38 MAP kinase. Bioorg Med Chem Lett 2011; 21:4066-71. [PMID: 21641211 DOI: 10.1016/j.bmcl.2011.04.121] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 04/23/2011] [Accepted: 04/26/2011] [Indexed: 01/15/2023]
Abstract
The synthesis and SAR studies of a novel N-aryl pyridinone class of p38 kinase inhibitors are described. Systematic structural modifications to the HTS lead, 5, led to the identification of (-)-4a as a clinical candidate for the treatment of inflammatory diseases. Additionally, the chiral synthesis and properties of (-)-4a are described.
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Affiliation(s)
- Shaun R Selness
- Department of Medicinal Chemistry, Pfizer Corporation, 700 Chesterfield Parkway West, Chesterfield, MO 63017, United States.
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6
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Xie J, Poda GI, Hu Y, Chen NX, Heier RF, Wolfson SG, Reding MT, Lennon PJ, Kurumbail RG, Selness SR, Li X, Kishore NN, Sommers CD, Christine L, Bonar SL, Venkatraman N, Mathialagan S, Brustkern SJ, Huang HC. Aminopyridinecarboxamide-based inhaled IKK-2 inhibitors for asthma and COPD: Structure-activity relationship. Bioorg Med Chem 2010; 19:1242-55. [PMID: 21236687 DOI: 10.1016/j.bmc.2010.12.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 12/07/2010] [Accepted: 12/13/2010] [Indexed: 11/24/2022]
Abstract
Installation of sites for metabolism in the lead compound PHA-767408 was the key focus of the IKK-2 inhaled program. This paper reports our efforts to identify a novel series of aminopyridinecarboxamide-based IKK-2 inhibitors, which display low nanomolar potency against IKK-2 with long duration of action (DOA), and metabolically labile to phase I and/or phase II metabolizing enzymes with potential capability for multiple routes of clearance. Several compounds have demonstrated their potential usefulness in the treatment of asthma and chronic obstructive pulmonary disease (COPD).
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Affiliation(s)
- Jin Xie
- Department of Medicinal Chemistry, Pfizer Inc., 700 Chesterfield Parkway West, St. Louis, MO 63017, USA.
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7
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Mathialagan S, Poda GI, Kurumbail RG, Selness SR, Hall T, Reitz BA, Weinberg RA, Kishore N, Mbalaviele G. Expression, purification and functional characterization of IκB kinase-2 (IKK-2) mutants. Protein Expr Purif 2010; 72:254-61. [DOI: 10.1016/j.pep.2010.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Accepted: 02/16/2010] [Indexed: 11/17/2022]
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8
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Morris DL, O’Neil SP, Devraj RV, Portanova JP, Gilles RW, Gross CJ, Curtiss SW, Komocsar WJ, Garner DS, Happa FA, Kraus LJ, Nikula KJ, Monahan JB, Selness SR, Galluppi GR, Shevlin KM, Kramer JA, Walker JK, Messing DM, Anderson DR, Mourey RJ, Whiteley LO, Daniels JS, Yang JZ, Rowlands PC, Alden CL, Davis JW, Sagartz JE. Acute Lymphoid and Gastrointestinal Toxicity Induced by Selective p38α Map Kinase and Map Kinase–Activated Protein Kinase-2 (MK2) Inhibitors in the Dog. Toxicol Pathol 2010; 38:606-18. [DOI: 10.1177/0192623310367807] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Exposure to moderately selective p38α mitogen-activated protein kinase (MAPK) inhibitors in the Beagle dog results in an acute toxicity consisting of mild clinical signs (decreased activity, diarrhea, and fever), lymphoid necrosis and depletion in the gut-associated lymphoid tissue (GALT), mesenteric lymph nodes and spleen, and linear colonic and cecal mucosal hemorrhages. Lymphocyte apoptosis and necrosis in the GALT is the earliest and most prominent histopathologic change observed, followed temporally by neutrophilic infiltration and acute inflammation of the lymph nodes and spleen and multifocal mucosal epithelial necrosis and linear hemorrhages in the colon and cecum. These effects are not observed in the mouse, rat, or cynomolgus monkey. To further characterize the acute toxicity in the dog, a series of in vivo, in vitro, and immunohistochemical studies were conducted to determine the relationship between the lymphoid and gastrointestinal (GI) toxicity and p38 MAPK inhibition. Results of these studies demonstrate a direct correlation between p38α MAPK inhibition and the acute lymphoid and gastrointestinal toxicity in the dog. Similar effects were observed following exposure to inhibitors of MAPK-activated protein kinase-2 (MK2), further implicating the role of p38α MAPK signaling pathway inhibition in these effects. Based on these findings, the authors conclude that p38α MAPK inhibition results in acute lymphoid and GI toxicity in the dog and is unique among the species evaluated in these studies.
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Affiliation(s)
- Dale L. Morris
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Shawn P. O’Neil
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Rajesh V. Devraj
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Joseph P. Portanova
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Richard W. Gilles
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Cindy J. Gross
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Sandra W. Curtiss
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - Debra S. Garner
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Fernando A. Happa
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Lori J. Kraus
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - Joseph B. Monahan
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Shaun R. Selness
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - Kimberly M. Shevlin
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | | | - John K. Walker
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Dean M. Messing
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - David R. Anderson
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Robert J. Mourey
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Laurence O. Whiteley
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - John S. Daniels
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Jerry Z. Yang
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Philip C. Rowlands
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
| | - Carl L. Alden
- Millennium Pharmaceuticals Inc., Cambridge, Massachusetts, USA
| | - John W. Davis
- Pfizer Inc., Drug Safety R&D, Research, Pharmacokinetics, Dynamics & Metabolism, and Pharmaceutical Sciences, St. Louis, Missouri, USA
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9
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Jerome KD, Hepperle ME, Walker JK, Xing L, Devraj RV, Benson AG, Baldus JE, Selness SR. Discovery of 5-substituted-N-arylpyridazinones as inhibitors of p38 MAP kinase. Bioorg Med Chem Lett 2010; 20:3146-9. [DOI: 10.1016/j.bmcl.2010.03.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 03/24/2010] [Accepted: 03/26/2010] [Indexed: 10/19/2022]
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10
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Baima ET, Guzova JA, Mathialagan S, Nagiec EE, Hardy MM, Song LR, Bonar SL, Weinberg RA, Selness SR, Woodard SS, Chrencik J, Hood WF, Schindler JF, Kishore N, Mbalaviele G. Novel insights into the cellular mechanisms of the anti-inflammatory effects of NF-kappaB essential modulator binding domain peptides. J Biol Chem 2010; 285:13498-506. [PMID: 20167598 PMCID: PMC2859510 DOI: 10.1074/jbc.m109.099895] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The classical nuclear factor κB (NF-κB) signaling pathway is under the control of the IκB kinase (IKK) complex, which consists of IKK-1, IKK-2, and NF-κB essential modulator (NEMO). This complex is responsible for the regulation of cell proliferation, survival, and differentiation. Dysregulation of this pathway is associated with several human diseases, and as such, its inhibition offers an exciting opportunity for therapeutic intervention. NEMO binding domain (NBD) peptides inhibit the binding of recombinant NEMO to IKK-2 in vitro. However, direct evidence of disruption of this binding by NBD peptides in biological systems has not been provided. Using a cell system, we expanded on previous observations to show that NBD peptides inhibit inflammation-induced but not basal cytokine production. We report that these peptides cause the release of IKK-2 from an IKK complex and disrupt NEMO-IKK-2 interactions in cells. We demonstrate that by interfering with NEMO-IKK-2 interactions, NBD peptides inhibit IKK-2 phosphorylation, without affecting signaling intermediates upstream of the IKK complex of the NF-κB pathway. Furthermore, in a cell-free system of IKK complex activation by TRAF6 (TNF receptor-associated factor 6), we show that these peptides inhibit the ability of this complex to phosphorylate downstream substrates, such as p65 and inhibitor of κBα (IκBα). Thus, consistent with the notion that NEMO regulates IKK-2 catalytic activity by serving as a scaffold, appropriately positioning IKK-2 for activation by upstream kinase(s), our findings provide novel insights into the molecular mechanisms by which NBD peptides exert their anti-inflammatory effects in cells.
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Affiliation(s)
- Eric T Baima
- Department of Inflammation, Pfizer Inc., Chesterfield, Missouri 63017, USA
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11
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Walker JK, Selness SR, Devraj RV, Hepperle ME, Naing W, Shieh H, Kurambail R, Yang S, Flynn DL, Benson AG, Messing DM, Dice T, Kim T, Lindmark RJ, Monahan JB, Portanova J. Identification of SD-0006, a potent diaryl pyrazole inhibitor of p38 MAP kinase. Bioorg Med Chem Lett 2010; 20:2634-8. [PMID: 20227876 DOI: 10.1016/j.bmcl.2010.02.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 02/10/2010] [Accepted: 02/10/2010] [Indexed: 10/19/2022]
Abstract
Starting from an initial HTS screening lead, a novel series of C(5)-substituted diaryl pyrazoles were developed that showed potent inhibition of p38alpha kinase. Key to this outcome was the switch from a pyridyl to pyrimidine at the C(4)-position leading to analogs that were potent in human whole blood based cell assay as well as in a number of animal efficacy models for rheumatoid arthritis. Ultimately, we identified a clinical candidate from this substrate; SD-0006.
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Affiliation(s)
- John K Walker
- Pfizer Global Research and Development, St. Louis, MO 63017, USA.
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12
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Selness SR, Devraj RV, Monahan JB, Boehm TL, Walker JK, Devadas B, Durley RC, Kurumbail R, Shieh H, Xing L, Hepperle M, Rucker PV, Jerome KD, Benson AG, Marrufo LD, Madsen HM, Hitchcock J, Owen TJ, Christie L, Promo MA, Hickory BS, Alvira E, Naing W, Blevis-Bal R. Discovery of N-substituted pyridinones as potent and selective inhibitors of p38 kinase. Bioorg Med Chem Lett 2009; 19:5851-6. [DOI: 10.1016/j.bmcl.2009.08.082] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 08/21/2009] [Accepted: 08/24/2009] [Indexed: 11/28/2022]
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13
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Hope HR, Anderson GD, Burnette BL, Compton RP, Devraj RV, Hirsch JL, Keith RH, Li X, Mbalaviele G, Messing DM, Saabye MJ, Schindler JF, Selness SR, Stillwell LI, Webb EG, Zhang J, Monahan JB. Anti-inflammatory properties of a novel N-phenyl pyridinone inhibitor of p38 mitogen-activated protein kinase: preclinical-to-clinical translation. J Pharmacol Exp Ther 2009; 331:882-95. [PMID: 19720877 DOI: 10.1124/jpet.109.158329] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Signal transduction through the p38 mitogen-activated protein (MAP) kinase pathway is central to the transcriptional and translational control of cytokine and inflammatory mediator production. p38 MAP kinase inhibition hence constitutes a promising therapeutic strategy for treatment of chronic inflammatory diseases, based upon its potential to inhibit key pathways driving the inflammatory and destructive processes in these debilitating diseases. The present study describes the pharmacological properties of the N-phenyl pyridinone p38 MAP kinase inhibitor benzamide [3- [3-bromo-4-[(2,4-difluorophenyl)methoxy]-6-methyl-2- oxo-1(2H)-pyridinyl]-N,4-dimethyl-, (-)-(9CI); PH-797804]. PH-797804 is an ATP-competitive, readily reversible inhibitor of the alpha isoform of human p38 MAP kinase, exhibiting a K(i) = 5.8 nM. In human monocyte and synovial fibroblast cell systems, PH-797804 blocks inflammation-induced production of cytokines and proinflammatory mediators, such as prostaglandin E(2), at concentrations that parallel inhibition of cell-associated p38 MAP kinase. After oral dosing, PH-797804 effectively inhibits acute inflammatory responses induced by systemically administered endotoxin in both rat and cynomolgus monkeys. Furthermore, PH-797804 demonstrates robust anti-inflammatory activity in chronic disease models, significantly reducing both joint inflammation and associated bone loss in streptococcal cell wall-induced arthritis in rats and mouse collagen-induced arthritis. Finally, PH-797804 reduced tumor necrosis factor-alpha and interleukin-6 production in clinical studies after endotoxin administration in a dose-dependent manner, paralleling inhibition of the target enzyme. Low-nanomolar biochemical enzyme inhibition potency correlated with p38 MAP kinase inhibition in human cells and in vivo studies. In addition, a direct correspondence between p38 MAP kinase inhibition and anti-inflammatory activity was observed with PH-797804, thus providing confidence in dose projections for further human studies in chronic inflammatory disease.
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Affiliation(s)
- Heidi R Hope
- Discovery Biology, Inflammation Research, Pfizer Global Research and Development, Chesterfield, Missouri 63017, USA.
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14
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Xing L, Shieh HS, Selness SR, Devraj RV, Walker JK, Devadas B, Hope HR, Compton RP, Schindler JF, Hirsch JL, Benson AG, Kurumbail RG, Stegeman RA, Williams JM, Broadus RM, Walden Z, Monahan JB. Structural bioinformatics-based prediction of exceptional selectivity of p38 MAP kinase inhibitor PH-797804. Biochemistry 2009; 48:6402-11. [PMID: 19496616 DOI: 10.1021/bi900655f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PH-797804 is a diarylpyridinone inhibitor of p38alpha mitogen-activated protein (MAP) kinase derived from a racemic mixture as the more potent atropisomer (aS), first proposed by molecular modeling and subsequently confirmed by experiments. On the basis of structural comparison with a different biaryl pyrazole template and supported by dozens of high-resolution crystal structures of p38alpha inhibitor complexes, PH-797804 is predicted to possess a high level of specificity across the broad human kinase genome. We used a structural bioinformatics approach to identify two selectivity elements encoded by the TXXXG sequence motif on the p38alpha kinase hinge: (i) Thr106 that serves as the gatekeeper to the buried hydrophobic pocket occupied by 2,4-difluorophenyl of PH-797804 and (ii) the bidentate hydrogen bonds formed by the pyridinone moiety with the kinase hinge requiring an induced 180 degrees rotation of the Met109-Gly110 peptide bond. The peptide flip occurs in p38alpha kinase due to the critical glycine residue marked by its conformational flexibility. Kinome-wide sequence mining revealed rare presentation of the selectivity motif. Corroboratively, PH-797804 exhibited exceptionally high specificity against MAP kinases and the related kinases. No cross-reactivity was observed in large panels of kinase screens (selectivity ratio of >500-fold). In cellular assays, PH-797804 demonstrated superior potency and selectivity consistent with the biochemical measurements. PH-797804 has met safety criteria in human phase I studies and is under clinical development for several inflammatory conditions. Understanding the rationale for selectivity at the molecular level helps elucidate the biological function and design of specific p38alpha kinase inhibitors.
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Affiliation(s)
- Li Xing
- Structural and Computational Chemistry, St. Louis Laboratories,Pfizer Global Research and Development, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, USA.
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Pirkle WH, Selness SR. Chiral Recognition Studies: Intra- and Intermolecular 1H{1H}-Nuclear Overhauser Effects as Effective Tools in the Study of Bimolecular Complexes. J Org Chem 2002. [DOI: 10.1021/jo00115a048] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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