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Li Y, Geng J, Liu Y, Yu S, Zhao G. Thiadiazole-a Promising Structure in Medicinal Chemistry. ChemMedChem 2012. [DOI: 10.1002/cmdc.201200355] [Citation(s) in RCA: 149] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Matthews EE, Thévenin D, Rogers JM, Gotow L, Lira PD, Reiter LA, Brissette WH, Engelman DM. Thrombopoietin receptor activation: transmembrane helix dimerization, rotation, and allosteric modulation. FASEB J 2011; 25:2234-44. [PMID: 21402716 PMCID: PMC3114528 DOI: 10.1096/fj.10-178673] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Accepted: 03/03/2011] [Indexed: 01/17/2023]
Abstract
We report how rotational variations in transmembrane (TM) helix interactions participate in the activity states of the thrombopoietin receptor (TpoR), a type 1 cytokine receptor that controls the production of blood platelets. We also explore the mechanism of small-molecule agonists that do not mimic the natural ligand. We show, by a combination of cysteine cross-linking, alanine-scanning mutagenesis, and computational simulations, that the TpoR TM dimerizes strongly and can adopt 3 different stable, rotationally related conformations, which may correspond to specific states of the full-length receptor (active, inactive, and partially active). Thus, our data suggest that signaling and inactive states of the receptor are related by receptor subunit rotations, rather than a simple monomer-dimer transition. Moreover, results from experiments with and without agonists in vitro and in cells allow us to propose a novel allosteric mechanism of action for a class of small molecules, in which they activate TpoR by binding to the TM region and by exploiting the rotational states of the dimeric receptor. Overall, our results support the emerging view of the participation of mutual rotations of the TM domains in cytokine receptor activation.
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Affiliation(s)
- Erin E. Matthews
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, USA; and
| | - Damien Thévenin
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, USA; and
| | - Julia M. Rogers
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, USA; and
| | - Lisa Gotow
- Pfizer Global Research and Development, Groton Laboratories, Groton, Connecticut, USA
| | - Paul D. Lira
- Pfizer Global Research and Development, Groton Laboratories, Groton, Connecticut, USA
| | - Lawrence A. Reiter
- Pfizer Global Research and Development, Groton Laboratories, Groton, Connecticut, USA
| | - William H. Brissette
- Pfizer Global Research and Development, Groton Laboratories, Groton, Connecticut, USA
| | - Donald M. Engelman
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, USA; and
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Abe M, Suzuki KI, Sakata C, Sugasawa K, Hirayama F, Koga Y, Kawasaki T, Naganuma S, Itoh H. Pharmacological profile of AS1670542, a novel orally-active human thrombopoietin receptor agonist. Eur J Pharmacol 2011; 650:58-63. [DOI: 10.1016/j.ejphar.2010.09.072] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 09/02/2010] [Accepted: 09/23/2010] [Indexed: 10/19/2022]
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4
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Andrade J, Cablewski T, Condie G, Haylock D, Meagher L, Riches A, Tarasova A, Werkmeister J, White J, Winkler D. Zinc is not required for activity of TPO agonists acting at the c-Mpl receptor transmembrane domain. ACS Chem Biol 2010; 5:741-5. [PMID: 20536264 DOI: 10.1021/cb100100u] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecules that mimic the cytokine thrombopoietin that act by an atypical mechanism of binding to a receptor transmembrane (TM) domain are widely understood to require zinc for their biological activity. We investigated potent thrombopoietin mimetics from three chemical classes including the recently registered drug Eltrombopag, which operate via this novel mechanism, to determine whether zinc is essential for inducing cell proliferation. Using addition of zinc and a potent metal chelator, we show that the existing paradigm is incorrect and the compounds exhibit excellent thrombopoietin-mimetic activity even in the presence of high concentrations of EDTA. The implications of these findings for the mechanism of action are discussed.
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Affiliation(s)
- Jessica Andrade
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
- The Australian Stem Cell Centre, PO Box 8002, Monash University LPO, Vic 3168, Australia
| | - Teresa Cablewski
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - Glenn Condie
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - David Haylock
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
- The Australian Stem Cell Centre, PO Box 8002, Monash University LPO, Vic 3168, Australia
| | - Laurence Meagher
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - Andrew Riches
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - Anna Tarasova
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - Jerome Werkmeister
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - Jacinta White
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
| | - David Winkler
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Vic 3169, Australia
- CRC for Polymers, Redwood Drive, Notting Hill, Vic 3168, Australia
- Monash Institute for Pharmaceutical Sciences, 381 Royal Parade, Parkville 3052, Australia
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Structure–activity relationships and hepatic safety risks of thiazole agonists of the thrombopoietin receptor. Bioorg Med Chem Lett 2010; 20:4069-72. [DOI: 10.1016/j.bmcl.2010.05.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Revised: 05/19/2010] [Accepted: 05/20/2010] [Indexed: 11/24/2022]
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6
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Tarasova A, Winkler DA. Modelling atypical small-molecule mimics of an important stem cell cytokine, thrombopoietin. ChemMedChem 2010; 4:2002-11. [PMID: 19810084 DOI: 10.1002/cmdc.200900340] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report the first comprehensive 3D QSAR study of a large, structurally diverse set of compounds that act as atypical thrombopoietin (TPO) mimics by interacting with the transmembrane domain of the TPO receptor, c-MPL. These agonists of c-MPL were superimposed according to a pharmacophore hypothesis, resulting in 3D QSAR models of high statistical significance. The pharmacophore-based superimposition and comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) were used to derive the QSAR models relating structure to the published in vitro bioactivities of the TPO mimics. The CoMFA and CoMSIA models gave high correlation coefficients of the bioactivities with the derived fields, resulting in robust prediction of agonist activity of the superimposed compounds. The models have been interpreted in terms of the requirements for binding to the transmembrane domain of the TPO receptor.
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Affiliation(s)
- Anna Tarasova
- Molecular and Health Technologies, CSIRO, Bag 10, Clayton South MDC, 3169, Australia
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Wehn PM, Harrington PE, Eksterowicz JE. Facile Synthesis of Substituted 5-Amino- and 3-Amino-1,2,4-Thiadiazoles from a Common Precursor. Org Lett 2009; 11:5666-9. [DOI: 10.1021/ol902371y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul M. Wehn
- Department of Medicinal Chemistry, Amgen Inc., 1120 Veterans Boulevard, South San Francisco, California 94080, Department of Medicinal Chemistry, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, and Department of Molecular Structure, Amgen Inc., 1120 Veterans Boulevard, South San Francisco, California 94080
| | - Paul E. Harrington
- Department of Medicinal Chemistry, Amgen Inc., 1120 Veterans Boulevard, South San Francisco, California 94080, Department of Medicinal Chemistry, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, and Department of Molecular Structure, Amgen Inc., 1120 Veterans Boulevard, South San Francisco, California 94080
| | - John E. Eksterowicz
- Department of Medicinal Chemistry, Amgen Inc., 1120 Veterans Boulevard, South San Francisco, California 94080, Department of Medicinal Chemistry, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, and Department of Molecular Structure, Amgen Inc., 1120 Veterans Boulevard, South San Francisco, California 94080
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Fukushima-Shintani M, Suzuki KI, Iwatsuki Y, Abe M, Sugasawa K, Hirayama F, Kawasaki T, Nakahata T. AKR-501 (YM477) a novel orally-active thrombopoietin receptor agonist. Eur J Haematol 2009; 82:247-54. [DOI: 10.1111/j.1600-0609.2008.01198.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Munchhof MJ, Antipas AS, Blumberg LC, Brissette WH, Brown MF, Casavant JM, Doty JL, Driscoll J, Harris TM, Wolf-Gouveia LA, Jones CS, Li Q, Linde RG, Lira PD, Marfat A, McElroy E, Mitton-Fry M, McCurdy SP, Reiter LA, Ripp SL, Shavnya A, Thomasco LM, Trevena KA. The identification of orally bioavailable thrombopoietin agonists. Bioorg Med Chem Lett 2009; 19:1428-30. [PMID: 19186055 DOI: 10.1016/j.bmcl.2009.01.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 01/06/2009] [Accepted: 01/12/2009] [Indexed: 10/21/2022]
Abstract
Recently, we disclosed a series of potent pyrimidine benzamide-based thrombopoietin receptor agonists. Unfortunately, the structural features required for the desired activity conferred physicochemical properties that were not favorable for the development of an oral agent. The physical properties of the series were improved by replacing the aminopyrimidinyl group with a piperidine-4-carboxylic acid moiety. The resulting compounds possessed favorable in vivo pharmacokinetic properties, including good bioavailability.
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Affiliation(s)
- Michael J Munchhof
- Pfizer Global Research and Development, Groton Laboratories, MS8220-2405, Eastern Point Road, Groton, CT 06340, USA
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Alper PB, Marsilje TH, Mutnick D, Lu W, Chatterjee A, Roberts MJ, He Y, Karanewsky DS, Chow D, Lao J, Gerken A, Tuntland T, Liu B, Chang J, Gordon P, Martin Seidel H, Tian SS. Discovery and biological evaluation of benzo[a]carbazole-based small molecule agonists of the thrombopoietin (Tpo) receptor. Bioorg Med Chem Lett 2008; 18:5255-8. [DOI: 10.1016/j.bmcl.2008.08.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2008] [Revised: 08/15/2008] [Accepted: 08/18/2008] [Indexed: 11/29/2022]
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11
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Molecular features crucial to the activity of pyrimidine benzamide-based thrombopoietin receptor agonists. Bioorg Med Chem Lett 2008; 18:3000-6. [DOI: 10.1016/j.bmcl.2008.03.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Revised: 03/16/2008] [Accepted: 03/17/2008] [Indexed: 11/22/2022]
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