1
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Proniewicz E, Ta Ta A, Iłowska E, Prahl A. Is the Use of Surface-Enhanced Infrared Spectroscopy Justified in the Selection of Peptide Fragments That Play a Role in Substrate-Receptor Interactions? Adsorption of Amino Acids and Neurotransmitters on Colloidal Ag and Au Nanoparticles. J Phys Chem B 2021; 125:2328-2338. [PMID: 33645996 PMCID: PMC8041316 DOI: 10.1021/acs.jpcb.1c00546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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This paper describes
an application of attenuated total reflection
Fourier transform infrared spectroscopy (ATR-FTIR) and surface-enhanced
infrared spectroscopy (SEIRA) to characterize the selective adsorption
of four peptides present in body fluids such as neuromedin B (NMB),
bombesin (BN), neurotensin (NT), and bradykinin (BK), which are known
as markers for various human carcinomas. To perform a reliable analysis
of the SERIA spectra of these peptides, curve fitting of these spectra
in the spectral region above 1500 cm–1 and SEIRA
measurements of sulfur-containing and aromatic amino acids were performed.
On the basis of the analyses of the spectral profiles, specific conclusions
were drawn regarding specific molecule–metal interactions and
changes in the interaction during the substrate change from the surface
of silver nanoparticles (AgNPs) to gold nanoparticles (AuNPs).
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Affiliation(s)
- E Proniewicz
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland
| | - A Ta Ta
- Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland
| | - E Iłowska
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
| | - A Prahl
- Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
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2
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Amouroux G, Zhang Z, Pan J, Jenni S, Zhang C, Hundal-Jabal N, Colpo N, Zeisler J, Lin KS, Bénard F. Synthesis and evaluation of a 68Ga-labeled bradykinin B1 receptor agonist for imaging with positron emission tomography. Bioorg Med Chem 2017; 25:690-696. [PMID: 27908753 DOI: 10.1016/j.bmc.2016.11.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 11/18/2016] [Accepted: 11/21/2016] [Indexed: 12/31/2022]
Abstract
A novel 68Ga-labeled bradykinin B1 receptor (B1R) agonist, 68Ga-Z01115, was synthesized and evaluated for imaging with positron emission tomography (PET). Z01115 exhibited good binding affinity (Ki=25.4±5.1nM) to hB1R. 68Ga-Z01115 was prepared in 74±5 decay-corrected radiochemical yield with >99% radiochemical purity and 155±89GBq/µmol (4.2±2.4Ci/μmol) specific activity. 68Ga-Z01115 was stable in vitro in mouse plasma (93% remaining intact after 60min incubation), and relatively stable in vivo (51±5% remaining intact at 5min post-injection). PET imaging and biodistribution studies in mice showed that 68Ga-Z01115 cleared rapidly from nontarget tissues/organs, and generated high target-to-nontarget contrast images. The uptake of 68Ga-Z01115 in B1R-positive (B1R+) tumor was 5.65±0.59%ID/g at 1h post-injection. Average contrast ratios of B1R+ tumor-to-B1R- tumor, -to-blood and -to-muscle were 24.3, 24.4 and 82.9, respectively. Uptake of 68Ga-Z01115 in B1R+ tumors was reduced by ∼90% with co-injection of cold standard, confirming it was mediated by B1R. Our data suggest that 68Ga-Z01115 is a promising tracer for imaging the expression of B1R that is overexpressed in a variety of cancers.
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Affiliation(s)
- Guillaume Amouroux
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Zhengxing Zhang
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Jinhe Pan
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Silvia Jenni
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Chengcheng Zhang
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Navjit Hundal-Jabal
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Nadine Colpo
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Jutta Zeisler
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Kuo-Shyan Lin
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada; Department of Radiology, University of British Columbia, 3350-950 West 10th Avenue, Vancouver, British Columbia V5Z 4E3, Canada.
| | - François Bénard
- Department of Molecular Oncology, BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada; Department of Radiology, University of British Columbia, 3350-950 West 10th Avenue, Vancouver, British Columbia V5Z 4E3, Canada.
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3
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Zhang Z, Amouroux G, Pan J, Jenni S, Zeisler J, Zhang C, Liu Z, Perrin DM, Bénard F, Lin KS. Radiolabeled B9958 Derivatives for Imaging Bradykinin B1 Receptor Expression with Positron Emission Tomography: Effect of the Radiolabel–Chelator Complex on Biodistribution and Tumor Uptake. Mol Pharm 2016; 13:2823-32. [DOI: 10.1021/acs.molpharmaceut.6b00428] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhengxing Zhang
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
| | - Guillaume Amouroux
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
| | - Jinhe Pan
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
| | - Silvia Jenni
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
| | - Jutta Zeisler
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
| | - Chengcheng Zhang
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
| | - Zhibo Liu
- Chemistry
Department, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - David M. Perrin
- Chemistry
Department, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - François Bénard
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
- Department
of Radiology, University of British Columbia, Vancouver, British Columbia V5Z 4E3, Canada
| | - Kuo-Shyan Lin
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada
- Department
of Radiology, University of British Columbia, Vancouver, British Columbia V5Z 4E3, Canada
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4
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Kumar H, Ropper AE, Lee SH, Han I. Propitious Therapeutic Modulators to Prevent Blood-Spinal Cord Barrier Disruption in Spinal Cord Injury. Mol Neurobiol 2016; 54:3578-3590. [PMID: 27194298 DOI: 10.1007/s12035-016-9910-6] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 05/03/2016] [Indexed: 01/09/2023]
Abstract
The blood-spinal cord barrier (BSCB) is a specialized protective barrier that regulates the movement of molecules between blood vessels and the spinal cord parenchyma. Analogous to the blood-brain barrier (BBB), the BSCB plays a crucial role in maintaining the homeostasis and internal environmental stability of the central nervous system (CNS). After spinal cord injury (SCI), BSCB disruption leads to inflammatory cell invasion such as neutrophils and macrophages, contributing to permanent neurological disability. In this review, we focus on the major proteins mediating the BSCB disruption or BSCB repair after SCI. This review is composed of three parts. Section 1. SCI and the BSCB of the review describes critical events involved in the pathophysiology of SCI and their correlation with BSCB integrity/disruption. Section 2. Major proteins involved in BSCB disruption in SCI focuses on the actions of matrix metalloproteinases (MMPs), tumor necrosis factor alpha (TNF-α), heme oxygenase-1 (HO-1), angiopoietins (Angs), bradykinin, nitric oxide (NO), and endothelins (ETs) in BSCB disruption and repair. Section 3. Therapeutic approaches discusses the major therapeutic compounds utilized to date for the prevention of BSCB disruption in animal model of SCI through modulation of several proteins.
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Affiliation(s)
- Hemant Kumar
- Department of Neurosurgery, CHA University, CHA Bundang Medical Center, Seongnam-si, Gyeonggi-do, 13496, Republic of Korea
| | - Alexander E Ropper
- Department of Neurosurgery, Baylor College of Medicine, Houston, TX, USA
| | - Soo-Hong Lee
- Department of Biomedical Science, CHA University, Seongnam-si, Gyeonggi-do, 13488, Republic of Korea.
| | - Inbo Han
- Department of Neurosurgery, CHA University, CHA Bundang Medical Center, Seongnam-si, Gyeonggi-do, 13496, Republic of Korea.
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5
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Zhang Z, Lau J, Kuo HT, Zhang C, Hundal-Jabal N, Colpo N, Bénard F, Lin KS. Synthesis and evaluation of 18 F-labeled 4-nitrobenzyl derivatives for imaging tumor hypoxia with positron emission tomography: Comparison of 2-[ 18 F]fluoroethyl carbonate and 2-[ 18 F]fluoroethyl carbamate. Bioorg Med Chem Lett 2016; 26:584-588. [DOI: 10.1016/j.bmcl.2015.11.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 11/14/2015] [Accepted: 11/19/2015] [Indexed: 10/22/2022]
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6
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Amouroux G, Pan J, Jenni S, Zhang C, Zhang Z, Hundal-Jabal N, Colpo N, Liu Z, Bénard F, Lin KS. Imaging Bradykinin B1 Receptor with 68Ga-Labeled [des-Arg10]Kallidin Derivatives: Effect of the Linker on Biodistribution and Tumor Uptake. Mol Pharm 2015; 12:2879-88. [DOI: 10.1021/acs.molpharmaceut.5b00070] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Guillaume Amouroux
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Jinhe Pan
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Silvia Jenni
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Chengcheng Zhang
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Zhengxing Zhang
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Navjit Hundal-Jabal
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Nadine Colpo
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Zhibo Liu
- Chemistry
Department, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - François Bénard
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
- Department
of Radiology, University of British Columbia, Vancouver, BC V5Z 4E3, Canada
| | - Kuo-Shyan Lin
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
- Department
of Radiology, University of British Columbia, Vancouver, BC V5Z 4E3, Canada
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7
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Liu Z, Amouroux G, Zhang Z, Pan J, Hundal-Jabal N, Colpo N, Lau J, Perrin DM, Bénard F, Lin KS. 18F-Trifluoroborate Derivatives of [Des-Arg10]Kallidin for Imaging Bradykinin B1 Receptor Expression with Positron Emission Tomography. Mol Pharm 2015; 12:974-82. [DOI: 10.1021/acs.molpharmaceut.5b00003] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhibo Liu
- Chemistry
Department, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Guillaume Amouroux
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Zhengxing Zhang
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Jinhe Pan
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Navjit Hundal-Jabal
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Nadine Colpo
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - Joseph Lau
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
| | - David M. Perrin
- Chemistry
Department, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - François Bénard
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
- Department
of Radiology, University of British Columbia, Vancouver, BC V5Z 4E3, Canada
| | - Kuo-Shyan Lin
- Department
of Molecular Oncology, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada
- Department
of Radiology, University of British Columbia, Vancouver, BC V5Z 4E3, Canada
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8
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Bhat M, Pouliot M, Couture R, Vaucher E. The kallikrein-kinin system in diabetic retinopathy. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 2014; 69:111-43. [PMID: 25130041 DOI: 10.1007/978-3-319-06683-7_5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Diabetic retinopathy (DR) is a major microvascular complication associated with type 1 and type 2 diabetes mellitus, which can lead to visual impairment and blindness. Current treatment strategies for DR are mostly limited to laser therapies, steroids, and anti-VEGF agents, which are often associated with unwanted side effects leading to further complications. Recent evidence suggests that kinins play a primary role in the development of DR through enhanced vascular permeability, leukocytes infiltration, and other inflammatory mechanisms. These deleterious effects are mediated by kinin B1 and B2 receptors, which are expressed in diabetic human and rodent retina. Importantly, kinin B1 receptor is virtually absent in sane tissue, yet it is induced and upregulated in diabetic retina. These peptides belong to the kallikrein-kinin system (KKS), which contains two separate and independent pathways of regulated serine proteases, namely plasma kallikrein (PK) and tissue kallikrein (TK) that are involved in the biosynthesis of bradykinin (BK) and kallidin (Lys-BK), respectively. Hence, ocular inhibition of kallikreins or antagonism of kinin receptors offers new therapeutic avenues in the treatment and management of DR. Herein, we present an overview of the principal features and known inflammatory mechanisms associated with DR along with the current therapeutic approaches and put special emphasis on the KKS as a new and promising therapeutic target due to its link with key pathways directly associated with the development of DR.
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9
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Sobolewski D, Proniewicz E, Skołuba D, Prahl A, Ozaki Y, Kim Y, Proniewicz LM. Characterization of adsorption mode of new B 2 bradykinin receptor antagonists onto colloidal Ag substrate. JOURNAL OF RAMAN SPECTROSCOPY 2013; 44:212-218. [DOI: 10.1002/jrs.4193] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2024]
Abstract
In this paper, the surface‐enhanced Raman scattering (SERS) spectra of the potent B2 bradykinin receptor antagonists, [D‐Arg0,Hyp3,Thi5,8,L‐Pip7]BK, Aaa[D‐Arg0,Hyp3,Thi5,8,L‐Pip7]BK, [D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK, and Aaa[D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK, were measured when immobilized onto a colloidal assembly of apparently randomly adhering Ag spheres with diameters of approximately 20 – 25 nm. The observed SERS bands corresponding to different vibrational modes of the molecule, attached to or near Ag, and the variations in these bands resulting from competitive interactions of the functional groups of the peptides with the SERS‐active Ag surfaces were analyzed in this study. Briefly, it was shown that Pip, in generally in vertical orientation, and Thi, in the edge‐on position, relative to the colloidal Ag surface interacted with this surface through their lone electron pairs on the nitrogen and sulfur atoms, respectively. The imide bond of the X‐Pro peptide linkage and the guanidine group of Arg were involved in the adsorption process. In addition, it was demonstrated that the specific differences in the amino acid sequences slightly influenced the mode of adsorption. For example, Aaa in Aaa[D‐Arg0,Hyp3,Thi5,8,L‐Pip7]BK and Aaa[D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK and D‐Phe (vertical with respect to the colloidal Ag surface) in [D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK, and Aaa[D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK assisted in the adsorption of these peptides onto the colloidal Ag particles. To discuss these spectral alterations due to the different surface adsorption mechanisms of these peptides, the spectral changes were analyzed according to the adsorption process and Fourier‐transform‐Raman spectra. Copyright © 2013 John Wiley & Sons, Ltd.
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Affiliation(s)
- Dariusz Sobolewski
- Department of Chemistry University of Gdansk ul. Sobieskiego 18/19 80‐952 Gdansk Poland
| | - Edyta Proniewicz
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
| | - Dominika Skołuba
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
| | - Adam Prahl
- Department of Chemistry University of Gdansk ul. Sobieskiego 18/19 80‐952 Gdansk Poland
| | - Yukihiro Ozaki
- Department of Chemistry, School of Science and Technology Kwansei‐Gakuin University 2‐1 Gakuen Sanda Hyogo 669‐1337 Japan
| | - Younkyoo Kim
- Department of Chemistry Hankuk University of Foreign Studies Yongin Kyunggi‐Do 449‐791 Korea
| | - Leonard M. Proniewicz
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
- Department of Chemistry, School of Science and Technology Kwansei‐Gakuin University 2‐1 Gakuen Sanda Hyogo 669‐1337 Japan
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10
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Proniewicz E, Skołuba D, Kudelski A, Sobolewski D, Prahl A, Kim Y, Proniewicz LM. B 2 bradykinin receptor antagonists: adsorption mechanism on electrochemically roughened Ag substrate. JOURNAL OF RAMAN SPECTROSCOPY 2013; 44:205-211. [DOI: 10.1002/jrs.4182] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2024]
Abstract
In this paper, the surface‐enhanced Raman scattering (SERS) spectra of the potent B2 bradykinin receptor antagonists, [D‐Arg0,Hyp3,Thi5,8,L‐Pip7]BK, Aaa[D‐Arg0,Hyp3,Thi5,8,L‐Pip7]BK, [D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK, and Aaa[D‐Arg0,Hyp3,Thi5,D‐Phe7,L‐Pip8]BK, were measured when immobilized onto a highly specific electrochemically roughened SERS‐active Ag substrate characterized by the formation of a 50 – 150 nm Ag islands on its surface. The observed SERS bands corresponding to different vibrational modes of the molecule, attached to or near Ag, and the variations in these bands resulting from competitive interactions of the functional groups of the peptides with the SERS‐active Ag surfaces and reorientation occurring over time of adsorption were analyzed in this study. Copyright © 2012 John Wiley & Sons, Ltd.
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Affiliation(s)
- Edyta Proniewicz
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
| | - Dominika Skołuba
- Faculty of Chemistry Jagiellonian University ul. Ingardena 3 30‐060 Krakow Poland
| | - Andrzej Kudelski
- Department of Chemistry University of Warsaw ul. L. Pasteura 1 02‐093 Warsaw Poland
| | - Dariusz Sobolewski
- Department of Chemistry University of Gdansk Sobieskiego 18 80‐952 Gdansk Poland
| | - Adam Prahl
- Department of Chemistry University of Gdansk Sobieskiego 18 80‐952 Gdansk Poland
| | - Younkyoo Kim
- Department of Chemistry Hankuk University of Foreign Studies Yongin Kyunggi‐Do 449‐791 Korea
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Quinolinyl- and phenantridinyl-acetamides as bradykinin B1 receptor antagonists. Bioorg Med Chem Lett 2012; 22:3095-9. [DOI: 10.1016/j.bmcl.2012.03.065] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 03/15/2012] [Accepted: 03/16/2012] [Indexed: 11/22/2022]
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12
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Śleszyńska M, Wierzba TH, Malinowski K, Borovičková L, Małuch I, Sobolewski D, Lammek B, Slaninová J, Prahl A. Novel analogues of bradykinin conformationally restricted in the C-terminal part of the molecule. J Pept Sci 2011; 17:366-72. [DOI: 10.1002/psc.1351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 10/30/2010] [Accepted: 12/12/2010] [Indexed: 11/09/2022]
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13
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Bodmer-Narkevitch V, Anthony NJ, Cofre V, Jolly SM, Murphy KL, Ransom RW, Reiss DR, Tang C, Prueksaritanont T, Pettibone DJ, Bock MG, Kuduk SD. Indazole derivatives as novel bradykinin B1 receptor antagonists. Bioorg Med Chem Lett 2010; 20:7011-4. [PMID: 20971001 DOI: 10.1016/j.bmcl.2010.09.121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 09/22/2010] [Accepted: 09/23/2010] [Indexed: 11/27/2022]
Abstract
A new class of indazole-derived bradykinin B(1) antagonists and their structure-activity relationships (SAR) is reported. A number of compounds were found to have low-nanomolar affinity for the human B(1) receptor and possess acceptable P-gp and pharmacokinetics properties.
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Affiliation(s)
- Vera Bodmer-Narkevitch
- Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA.
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14
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Bélanger S, Bovenzi V, Côté J, Neugebauer W, Amblard M, Martinez J, Lammek B, Savard M, Gobeil F. Structure-activity relationships of novel peptide agonists of the human bradykinin B2 receptor. Peptides 2009; 30:777-87. [PMID: 19111586 DOI: 10.1016/j.peptides.2008.12.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Revised: 11/28/2008] [Accepted: 12/01/2008] [Indexed: 11/22/2022]
Abstract
The nonapeptide bradykinin (BK) is involved in the genesis of inflammation, edema and in pain mediation. As such, much effort has gone into the development of peptide/non-peptide antagonists to counteract these processes. However, there is an increasing awareness of the potential value of chemically stable BK agonists in the treatment of diabetes and cardiovascular diseases. In this study, a structure-activity relationship study of BK was performed to develop potent and stable peptide mimetics active at the human B2 receptors (hB2R). Twenty-three analogues were produced with substitutions at positions 1, 3, 5, 7, 8 and/or 9 of BK. In vitro binding (on transiently transfected HEK-293T cells) and biological activities (vasomotricity tests on human umbilical veins, MAPK assays on HEK-293T cells) of novel BK peptide derivatives at hB2R were determined alongside with previously reported synthetic agonists (e.g. RMP-7, JMV1609, FR190997). Some peptides were also tested in vivo in rats and rabbits using blood pressure assays. Two compounds, [Hyp(3), Thi(5), Cha(8)]-BK and [Hyp(3), Thi(5), (N)Chg(7), Thi(8)]-BK, exhibited equivalent (or even greater) in vitro affinities and potencies to BK at the naturally expressed and recombinant hB2R. Their potency and duration of action in vivo were highly superior to BK, thus inferring that they can withstand intravascular proteolysis. These novel compounds show promise as candidates for investigating the pharmacology of BK receptors and developing potential therapeutical applications.
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Affiliation(s)
- Simon Bélanger
- Department of Pharmacology, Université de Sherbrooke, Québec, Canada
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15
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Olson TP, Frantz RP, Turner ST, Bailey KR, Wood CM, Johnson BD. Gene Variant of the Bradykinin B2 Receptor Influences Pulmonary Arterial Pressures in Heart Failure Patients. CLINICAL MEDICINE. CIRCULATORY, RESPIRATORY AND PULMONARY MEDICINE 2009. [DOI: 10.4137/ccrpm.s2147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Background Pulmonary arterial pressure (PAP) varies considerably in heart failure (HF) despite similar degrees of left ventricular (LV) dysfunction. Bradykinin alters vascular tone and common variations in the kinin B2 receptor (BDKRB2) gene exists. We hypothesized that genetic variation in this receptor would influence PAP in HF. Methods 131 HF patients (>1yr history systolic HF), without COPD, not currently smoking, BMI < 40, without atrial fibrillation completed the study which included a blood draw for genotyping and neurohormones (ACE, A-II, Bradykinin, ANP, BNP, and catecholamines), an echocardiogram for cardiac function and systolic PAP (PAPsys). Results Mean LVEF was 29% ∓ 12%, NYHA class 2 ∓ 1, age 56 ∓ 12 yr, BMI 28 ∓ 5 kg/m2. Forty-six patients (35%) were homozygous for the +9 allele, 58 (44%) were heterozygous (+9/-9) and 27 (21%) were homozygous for the -9 allele of the BDKRB2. PAPsys averaged 42 ∓ 13, 38 ∓ 12, and 35 ∓ 11 mmHg for +9/+9, +9/-9 and -9/-9, respectively (p = 0.03). There was a trend towards gene effect for plasma ACE with the highest values in +9/+9 and lowest in -9/-9 patients (9.5 ∓ 10.7, 7.1 ∓ 8.7, and 5.4 ∓ 6.4 U/L, respectively, p = 0.06). There were no differences in plasma bradykinin or A-II, LVEF, or NYHA across genotypes. Conclusion These data suggest the +9/+9 polymorphism of the BDKRB2 receptor influences pulmonary vascular tone in stable HF.
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Wood MR, Schirripa KM, Kim JJ, Kuduk SD, Chang RK, Di Marco CN, DiPardo RM, Wan BL, Murphy KL, Ransom RW, Chang RS, Holahan MA, Cook JJ, Lemaire W, Mosser SD, Bednar RA, Tang C, Prueksaritanont T, Wallace AA, Mei Q, Yu J, Bohn DL, Clayton FC, Adarayn ED, Sitko GR, Leonard YM, Freidinger RM, Pettibone DJ, Bock MG. α-Hydroxy amides as a novel class of bradykinin B1 selective antagonists. Bioorg Med Chem Lett 2008; 18:716-20. [DOI: 10.1016/j.bmcl.2007.11.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Revised: 11/12/2007] [Accepted: 11/14/2007] [Indexed: 10/22/2022]
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18
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Kuduk SD, DiPardo RM, Chang RK, Di Marco CN, Murphy KL, Ransom RW, Reiss DR, Tang C, Prueksaritanont T, Pettibone DJ, Bock MG. Bradykinin B1 antagonists: Biphenyl SAR studies in the cyclopropanecarboxamide series. Bioorg Med Chem Lett 2007; 17:3608-12. [DOI: 10.1016/j.bmcl.2007.04.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 04/16/2007] [Accepted: 04/17/2007] [Indexed: 01/16/2023]
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19
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Kuduk SD, Di Marco CN, Chang RK, Wood MR, Schirripa KM, Kim JJ, Wai JMC, DiPardo RM, Murphy KL, Ransom RW, Harrell CM, Reiss DR, Holahan MA, Cook J, Hess JF, Sain N, Urban MO, Tang C, Prueksaritanont T, Pettibone DJ, Bock MG. Development of Orally Bioavailable and CNS Penetrant Biphenylaminocyclopropane Carboxamide Bradykinin B1 Receptor Antagonists. J Med Chem 2006; 50:272-82. [PMID: 17228869 DOI: 10.1021/jm061094b] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of biphenylaminocyclopropane carboxamide based bradykinin B1 receptor antagonists has been developed that possesses good pharmacokinetic properties and is CNS penetrant. Discovery that the replacement of the trifluoropropionamide in the lead structure with polyhaloacetamides, particularly a trifluoroacetamide, significantly reduced P-glycoprotein mediated efflux for the series proved essential. One of these novel bradykinin B1 antagonists (13b) also exhibited suitable pharmacokinetic properties and efficient ex vivo receptor occupancy for further development as a novel approach for the treatment of pain and inflammation.
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Affiliation(s)
- Scott D Kuduk
- Department of Medicinal Chemistry, Merck Research Laboratories, Sumneytown Pike, P.O. Box 4, West Point, Pennsylvania 19486, USA
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Morissette G, Houle S, Gera L, Stewart JM, Marceau F. Antagonist, partial agonist and antiproliferative actions of B-9870 (CU201) as a function of the expression and density of the bradykinin B1 and B2 receptors. Br J Pharmacol 2006; 150:369-79. [PMID: 17179948 PMCID: PMC2013894 DOI: 10.1038/sj.bjp.0706982] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND AND PURPOSE A bradykinin (BK) B2 receptor (B2R) antagonist, B-9870 (CU201), has been proposed to behave as a 'biased agonist' at B2Rs and to exert anti-neoplasic effects. It was unclear whether these effects were determined by the activation of B2Rs by the drug. B-9870 was evaluated for antagonism or stimulation of several responses mediated by the rabbit B2R or B1 receptor (B1R); its anti-proliferative activity was also characterized. EXPERIMENTAL APPROACH AND KEY RESULTS B-9870 was an insurmountable B2R antagonist in the rabbit jugular vein contractility assay, but a partial agonist in HEK 293 cells expressing the rabbit B2R or a green fluorescent protein (GFP) conjugate of the latter (ERK1/2 phosphorylation, [Ca2+]i, [3H]-arachidonate release, endocytosis). The agonist-like effects of B-9870 were inhibited by the B2R antagonist LF 16.0687 and absent in untransfected cells. In addition, B-9870 was a surmontable antagonist of the rabbit B1R in the aorta contractility assay, and blocked Lys-des-Arg9-BK-induced ERK1/2 phosphorylation in HEK 293 cells expressing a fluorescent B1R conjugate. B-9870 inhibited the growth of MDA-MB-231 cells. The latter effect was not influenced by B1R or B2R antagonists and was not apoptotic. MDA-MB-231 cells expressed a small population of B2Rs but no B1Rs; they responded to BK (small calcium transients) and B-9870 behaved as an antagonist. CONCLUSION AND IMPLICATIONS B-9870 is a dual B1R and B2R antagonist with confirmed stimulating effects at the B2R in high expression systems only. Its cell type-specific anti-proliferative effect occurs at a high concentration, independently from kinin receptors and apoptosis.
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Affiliation(s)
- G Morissette
- Centre Hospitalier Universitaire de Québec, Centre de Recherche en Rhumatologie et Immunologie Québec, Québec, Canada
| | - S Houle
- Centre Hospitalier Universitaire de Québec, Centre de Recherche en Rhumatologie et Immunologie Québec, Québec, Canada
| | - L Gera
- University of Colorado Health Sciences Center Denver, CO, USA
| | - J M Stewart
- University of Colorado Health Sciences Center Denver, CO, USA
| | - F Marceau
- Centre Hospitalier Universitaire de Québec, Centre de Recherche en Rhumatologie et Immunologie Québec, Québec, Canada
- Author for correspondence:
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Kuduk SD, Di Marco CN, Chang RK, Wood MR, Kim JJ, Schirripa KM, Murphy KL, Ransom RW, Tang C, Torrent M, Ha S, Prueksaritanont T, Pettibone DJ, Bock MG. 5-Piperazinyl pyridine carboxamide bradykinin B1 antagonists. Bioorg Med Chem Lett 2006; 16:2791-5. [PMID: 16529929 DOI: 10.1016/j.bmcl.2006.01.112] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2006] [Revised: 01/30/2006] [Accepted: 01/31/2006] [Indexed: 10/24/2022]
Abstract
A series of 2,3-diaminopyridine bradykinin B(1) antagonists was modified to mitigate the potential for bioactivation. Removal of the 3-amino group and incorporation of basic 5-piperazinyl carboxamides at the pyridine 5-position provided compounds with high affinity for the human B(1) receptor.
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Affiliation(s)
- Scott D Kuduk
- Department of Medicinal Chemistry, Merck Research Laboratories, Sumneytown Pike, PO Box 4, West Point, PA 19486, USA.
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22
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Wood MR, Schirripa KM, Kim JJ, Wan BL, Murphy KL, Ransom RW, Chang RSL, Tang C, Prueksaritanont T, Detwiler TJ, Hettrick LA, Landis ER, Leonard YM, Krueger JA, Lewis SD, Pettibone DJ, Freidinger RM, Bock MG. Cyclopropylamino Acid Amide as a Pharmacophoric Replacement for 2,3-Diaminopyridine. Application to the Design of Novel Bradykinin B1 Receptor Antagonists. J Med Chem 2006; 49:1231-4. [PMID: 16480259 DOI: 10.1021/jm0511280] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Antagonism of the bradykinin B1 receptor represents a potential treatment for chronic pain and inflammation. Novel antagonists were designed that display low-nanomolar affinity for the human bradykinin B1 receptor and good bioavailability in the rat.
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Thompson AH, Bjourson AJ, Shaw C, McClean S. Bradykinin-related peptides from Phyllomedusa hypochondrialis azurea: Mass spectrometric structural characterisation and cloning of precursor cDNAs. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2006; 20:3780-8. [PMID: 17120273 DOI: 10.1002/rcm.2791] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Amphibian skin secretions contain a plethora of bioactive compounds, many of which are understood to act to deter ingestion by predators. Bradykinins in particular are constitutively expressed in many amphibian skin secretions, mediating a variety of effects including hyperalgesia and contraction of gastric smooth muscle. Using a variety of proteomic techniques (high-performance liquid chromatography (HPLC) separation, matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOFMS), and quadrupole time-of-flight tandem mass spectrometry (Q-TOF-MS/MS)) the current study identified 13 bradykinin-like peptides in the skin secretions of Phyllomedusa hypochondrialis azurea, including several new C-terminally extended isoforms (VPPGFTPFRLT, VHypPGFTPFRQT) and a novel phyllokinin-like peptide (RPPGFTPFRVY). Identification of the cDNA sequences encoding these peptides led to the deduction that the peptides were derived from differential post-translational processing and modification of five different precursors. Such an event emphasises the metabolic efficiency of peptide production in amphibian venom, with multiple products perhaps selective to different receptors in a variety of predators generated from a single precursor. An unusual modification was also recognised in the present study, with several bradykinin-like peptides featuring hydroxyprolination of the first proline residue rather than the commonly targeted second. This alteration may be mediated by the structural organisation of N-terminal amino acids prior to precursor processing.
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Feng DM, Wai JM, Kuduk SD, Ng C, Murphy KL, Ransom RW, Reiss D, Chang RSL, Harrell CM, MacNeil T, Tang C, Prueksaritanont T, Freidinger RM, Pettibone DJ, Bock MG. 2,3-Diaminopyridine as a platform for designing structurally unique nonpeptide bradykinin B1 receptor antagonists. Bioorg Med Chem Lett 2005; 15:2385-8. [PMID: 15837330 DOI: 10.1016/j.bmcl.2005.02.077] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2005] [Accepted: 02/25/2005] [Indexed: 10/25/2022]
Abstract
A novel class of 2,3-diaminopyridine bradykinin B1 receptor antagonists is disclosed. Structure-activity relationship studies (SARs) that led to compounds with significantly improved potency and pharmacokinetic properties relative to the lead compound are described.
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Affiliation(s)
- Dong-Mei Feng
- Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486, USA.
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25
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Kuduk SD, Chang RK, Ng C, Murphy KL, Ransom RW, Tang C, Prueksaritanont T, Freidinger RM, Pettibone DJ, Bock MG. Bradykinin B1 antagonists: SAR studies in the 2,3-diaminopyridine series. Bioorg Med Chem Lett 2005; 15:3925-9. [PMID: 15993596 DOI: 10.1016/j.bmcl.2005.05.133] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2005] [Revised: 05/24/2005] [Accepted: 05/25/2005] [Indexed: 11/24/2022]
Abstract
SAR study of the biphenyl region of 2,3-diaminopyridine bradykinin B1 antagonists was investigated with non-aromatic carbo- and heterocyclic rings. A piperidine ring was found to be a good replacement for the proximal phenyl ring while replacement of the distal phenyl was optimal with a cyclohexyl group leading to a dramatic improvement in affinity for the B1 receptor.
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Affiliation(s)
- Scott D Kuduk
- Department of Medicinal Chemistry, Sumneytown Pike, PO Box 4, West Point, PA 19486, USA.
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26
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Kuduk SD, Ng C, Feng DM, Wai JMC, Chang RSL, Harrell CM, Murphy KL, Ransom RW, Reiss D, Ivarsson M, Mason G, Boyce S, Tang C, Prueksaritanont T, Freidinger RM, Pettibone DJ, Bock MG. 2,3-Diaminopyridine Bradykinin B1 Receptor Antagonists. J Med Chem 2004; 47:6439-42. [PMID: 15588075 DOI: 10.1021/jm049394l] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bradykinin B1 receptor antagonists embody a potentially novel approach for the treatment of chronic pain and inflammation. A series of 2,3-diaminopyridine B1 antagonists was optimized to have sub-nanomolar affinity and good pharmacokinetic properties. Lead compounds were shown to exhibit good efficacy in rabbit in vivo models of pain and inflammation.
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Affiliation(s)
- Scott D Kuduk
- Department of Medicinal Chemistry, Merck Research Laboratories, PO Box 4, West Point, Pennsylvania 19486, USA.
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Cruden NLM, Witherow FN, Webb DJ, Fox KAA, Newby DE. Bradykinin Contributes to the Systemic Hemodynamic Effects of Chronic Angiotensin-Converting Enzyme Inhibition in Patients With Heart Failure. Arterioscler Thromb Vasc Biol 2004; 24:1043-8. [PMID: 15105283 DOI: 10.1161/01.atv.0000129331.21092.1d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Bradykinin is an endogenous vasodilator that may contribute to the systemic effects of angiotensin-converting enzyme (ACE) inhibitor therapy. Using B9340, a bradykinin receptor antagonist, we determined the contribution of bradykinin to the systemic hemodynamic effects of long-term ACE inhibition in patients with chronic heart failure. METHODS AND RESULTS Fourteen patients with heart failure received enalapril (10 mg twice daily) or losartan (50 mg twice daily) in a randomized double-blind crossover trial. After 6 weeks treatment, patients underwent right heart catheterization and were randomized to an intravenous infusion of B9340 (2 to 20 microg/kg per minute) or saline placebo. After B9340 infusion in patients treated with enalapril, mean arterial pressure (+5.2 mm Hg), systemic vascular resistance (+315 dynes x s/cm5), pulmonary arterial wedge pressure (-1.4 mm Hg), and mean pulmonary arterial pressure (-1.3 mm Hg) were greater compared with losartan (P<0.005, P=0.07, P<0.0001, and P<0.05 respectively) or placebo infusion (P< or =0.005 for all). There was a reduction in cardiac output after B9340 with enalapril compared with placebo (P<0.001) but not losartan. CONCLUSIONS Bradykinin contributes to the systemic hemodynamic effects of long-term ACE inhibition in patients with heart failure. This mechanism may explain the apparent clinical differences between ACE inhibitors and angiotensin receptor blockers in the treatment of heart failure.
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Affiliation(s)
- Nicholas L M Cruden
- Centre for Cardiovascular Science, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom EH16 4SB.
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28
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Sawada Y, Kayakiri H, Abe Y, Mizutani T, Inamura N, Asano M, Hatori C, Aramori I, Oku T, Tanaka H. Discovery of the First Non-Peptide Full Agonists for the Human Bradykinin B2 Receptor Incorporating 4-(2-Picolyloxy)quinoline and 1-(2-Picolyl)benzimidazole Frameworks. J Med Chem 2004; 47:2853-63. [PMID: 15139763 DOI: 10.1021/jm030468n] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the course of our studies on non-peptide bradykinin (BK) B(2) receptor ligands, it was suggested that the 4-substituent of the quinoline ring may play a critical role in determining binding affinities for human and guinea pig B(2) receptors, as well as agonist/antagonist properties. We carried out an extensive investigation to elucidate the structure-activity relationships (SAR) for this key pharmacophore. Introduction of lower alkoxy groups to the 4-position of the quinoline ring of 3 led to the identification of 4-ethoxy derivative 22b as a unique partial agonist. This compound significantly stimulated inositol phosphates (IPs) formation in Chinese hamster ovary cells expressing the cloned human B(2) receptor at concentrations greater than 10 nM and displayed one-tenth of the intrinsic activity of BK. The agonist activity of 22b was selective for the B(2) receptor and was inhibited by selective peptide and non-peptide B(2) antagonists. On the other hand, 22b strongly suppressed BK-induced IPs formation through the cloned human B(2) receptor. Further studies on the key pharmacophore led to identification of a 2-picolyloxy moiety as a powerful agonist switch, leading to the discovery of a potent and efficacious non-peptide B(2) agonist, 19a. Successive optimization of the acyl side chain afforded 38, which exhibited full agonist activity on stimulation of IPs formation. Furthermore, this strategy could be applied successfully to the benzimidazole series. The representative 1-(2-picolyl)benzimidazole derivative 47c increased PGE(2) production at a 1 microM concentration to the same level as the maximum effect of BK. Thus, we have established the medicinal chemistry modifications required to convert our highly potent non-peptide B(2) antagonists to agonists with potent efficacy.
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Affiliation(s)
- Yuki Sawada
- Exploratory Research Laboratories, Fujisawa Pharmaceutical Co. Ltd., 5-2-3 Tokodai, Tsukuba, Ibaraki 300-2698, Japan
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29
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Sawada Y, Kayakiri H, Abe Y, Mizutani T, Inamura N, Asano M, Aramori I, Hatori C, Oku T, Tanaka H. A New Class of Nonpeptide Bradykinin B2 Receptor Ligand, Incorporating a 4-Aminoquinoline Framework. Identification of a Key Pharmacophore To Determine Species Difference and Agonist/Antagonist Profile. J Med Chem 2004; 47:2667-77. [PMID: 15115408 DOI: 10.1021/jm030326t] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Introduction of various aliphatic amino groups at the 4-position of the quinoline moiety of our nonpeptide bradykinin (BK) B(2) receptor antagonists afforded highly potent ligands for human B(2) receptor with various affinities for guinea pig B(2) receptor, indicating remarkable species difference. A representative 4-dimethyamino derivative 40a exhibited subnanomolar and nanomolar binding affinities for human and guinea pig B(2) receptors, respectively, and significantly inhibited BK-induced bronchoconstriction in guinea pigs at 10 microg/kg by intravenous administration. Further chemical modification led us to discover unique partial agonists for the human B(2) receptor that increase inositol phosphates (IPs) production by themselves in Chinese hamster ovary (CHO) cells expressing the cloned human B(2) receptor. Although their potency and efficacy were much lower than those of BK, we identified them as screening leads for nonpeptide B(2) agonists. In these studies it was revealed the 4-substituent of the quinoline moiety is the key pharmacophore to determine species difference and agonist/antagonist profiles.
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Affiliation(s)
- Yuki Sawada
- Exploratory Research Laboratories, Fujisawa Pharmaceutical Co Ltd, 5-2-3 Tokodai, Tsukuba, Ibaraki 300-2698, Japan
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30
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Sawada Y, Kayakiri H, Abe Y, Imai K, Mizutani T, Inamura N, Asano M, Aramori I, Hatori C, Katayama A, Oku T, Tanaka H. A New Series of Highly Potent Non-Peptide Bradykinin B2 Receptor Antagonists Incorporating the 4-Heteroarylquinoline Framework. Improvement of Aqueous Solubility and New Insights into Species Difference. J Med Chem 2004; 47:1617-30. [PMID: 15027853 DOI: 10.1021/jm030159x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Introduction of nitrogen-containing heteroaromatic groups at the 4-position of the quinoline moiety of our non-peptide B(2) receptor antagonists resulted in enhancing binding affinities for the human B(2) receptor and reducing binding affinities for the guinea pig one, providing new structural insights into species difference. A CoMFA study focused on the diversity of the quinoline moiety afforded correlative and predictive QSAR models of binding for the human B(2) receptor but not for the guinea pig one. A series of 4-(1-imidazolyl)quinoline derivatives could be dissolved in a 5% aqueous solution of citric acid up to a concentration of 10 mg/mL. A representative compound 48a inhibited the specific binding of [(3)H]BK to the cloned human B(2) receptor expressed in Chinese hamster ovary cells with an IC(50) value of 0.26 nM and significantly inhibited BK-induced bronchoconstriction in guinea pigs even at 1 microg/kg by intravenous administration.
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Affiliation(s)
- Yuki Sawada
- Exploratory Research Laboratories, Fujisawa Pharmaceutical Co. Ltd., 5-2-3 Tokodai, Tsukuba, Ibaraki 300-2698, Japan
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Witherow FN, Dawson P, Ludlam CA, Webb DJ, Fox KAA, Newby DE. Bradykinin receptor antagonism and endothelial tissue plasminogen activator release in humans. Arterioscler Thromb Vasc Biol 2003; 23:1667-70. [PMID: 12869356 DOI: 10.1161/01.atv.0000087142.99472.f6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We sought to assess pharmacodynamic responses to the bradykinin antagonist B9340 and to determine the contribution of the endothelial bradykinin receptor to stimulated tissue plasminogen activator (t-PA) release in humans. METHODS AND RESULTS Bilateral forearm blood flow and plasma fibrinolytic variables were measured in 8 volunteers during 100 minutes of intrabrachial infusions of saline placebo, B9340 at 4.5 nmol/min, or B9340 at 13.5 nmol/min. On each occasion, intra-arterial bradykinin (30 to 3000 pmol/min) and substance P (4 to 16 pmol/min) were coinfused for 10 minutes at each dose. To assess the onset and offset of action, 6 additional subjects on 2 occasions received intra-arterial bradykinin (100 pmol/min) for 60 minutes with a coinfusion of either saline placebo or B9340 (13.5 nmol/min) for 12 minutes. During placebo infusion, bradykinin and substance P caused dose-dependent vasodilatation in the infused forearm (P<0.001). B9340 caused a dose-dependent inhibition of bradykinin-induced forearm vasodilatation and t-PA release (P<0.001) without affecting substance P-induced vasodilatation or t-PA release (P=NS). B9340 caused a reversible inhibition of bradykinin-induced vasodilatation (P<0.001) with a rapid onset and offset of action. CONCLUSIONS B9340 is a potent, reversible, and selective competitive receptor antagonist of bradykinin-induced vasodilatation and t-PA release in humans.
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Affiliation(s)
- Fraser N Witherow
- Cardiovascular Research, University of Edinburgh, University of Edinburgh, Royal Infirmary of Edinburgh, UK
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Wood MR, Kim JJ, Han W, Dorsey BD, Homnick CF, DiPardo RM, Kuduk SD, MacNeil T, Murphy KL, Lis EV, Ransom RW, Stump GL, Lynch JJ, O'Malley SS, Miller PJ, Chen TB, Harrell CM, Chang RSL, Sandhu P, Ellis JD, Bondiskey PJ, Pettibone DJ, Freidinger RM, Bock MG. Benzodiazepines as potent and selective bradykinin B1 antagonists. J Med Chem 2003; 46:1803-6. [PMID: 12723943 DOI: 10.1021/jm034020y] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Antagonism of the bradykinin B(1) receptor was demonstrated to be a potential treatment for chronic pain and inflammation. Novel benzodiazepines were designed that display subnanomolar affinity for the bradykinin B(1) receptor (K(i) = 0.59 nM) and high selectivity against the bradykinin B(2) receptor (K(i) > 10 microM). In vivo efficacy, comparable to morphine, was demonstrated for lead compounds in a rodent hyperalgesia model.
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Affiliation(s)
- Michael R Wood
- Department of Medicinal Chemistry, Merck Research Laboratories, P.O. Box 4, West Point, Pennsylvania 19486, USA.
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Mehok AR, Mant CT, Gera L, Stewart J, Hodges RS. Preparative reversed-phase liquid chromatography of peptides. Isocratic two-step elution system for high loads on analytical columns. J Chromatogr A 2002; 972:87-99. [PMID: 12395949 DOI: 10.1016/s0021-9673(02)01076-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We have developed further our novel sample displacement chromatography (SDC) methodology to carry out preparative separations on analytical equipment and 15-cm analytical columns for sample loads < or = 200 mg. Thus, a two-step isocratic SDC protocol was developed and applied to the purification of important biologically active peptides, i.e. bradykinin antagonists of 10 and 11 residues. Following sample loading in 100% aqueous solvent at a concentration of approximately 7-10 mg/ml (with sample loads varying from 67 to 200 mg) onto a small C18 column (150 x 4.6 mm I.D., made up of three 50-mm columns attached in series), we applied isocratic elution with aqueous acetonitrile at two concentrations, the first (lower concentration) to displace hydrophilic impurities off the column and the second (higher concentration) to displace pure product from the column; hydrophobic impurities remain trapped on the column. This modified SDC approach promises to allow great flexibility in purifying peptides, at high yield of pure product (> 99% purity), and encompassing a range of sample hydrophobicities as well as sample loads (< or = 200 mg) varying by as much as a factor of three.
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Affiliation(s)
- Anthony R Mehok
- Department of Biochemistry and Molecular Genetics, University of Colorado Health Sciences Center, Denver 80262, USA
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Mason GS, Cumberbatch MJ, Hill RG, Rupniak NMJ. The bradykinin B1 receptor antagonist B9858 inhibits a nociceptive spinal reflex in rabbits. Can J Physiol Pharmacol 2002; 80:264-8. [PMID: 12025959 DOI: 10.1139/y02-049] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
There are two bradykinin receptor subtypes, designated B1 and B2. Whilst both have been implicated in nociception, it is believed that there is a low level of constitutive expression of B1 receptors and that their expression is induced by inflammation or tissue damage. The present study investigated the role of B1 receptors in spinal nociceptive processing using an in vivo electrophysiological assay in decerebrate, spinalized rabbits, a species that shares close B1 receptor homology with the human receptor. Inflammation was induced in the paw by an injection of complete Freund's adjuvant at least 1 h before recording single motor unit activity of the semitendinous/biceps femoris muscle in response to a noxious pinch of the foot. Control animals received an intraplantar injection of saline. The peptide B1 receptor antagonist B9858 was administered i.v. and caused dose-dependent and complete inhibition of the nociceptive spinal reflex (ID50 = 1 mg x kg(-1)). In control animals without paw inflammation, B9858 had no effect. These findings are consistent with other evidence that peptide B1 receptor antagonists inhibit spinal nociceptive reflexes only after induction of B1 receptors by inflammation and support the potential therapeutic utility of B1 receptor antagonists as analgesic and anti-inflammatory drugs.
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Affiliation(s)
- Glenn S Mason
- Department of Pharmacology, Neuroscience Research Centre, Merck Sharp and Dohme Research Laboratories, Harlow, Essex, UK
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Hirayama Y, Kayakiri H. [Bradykinin antagonist: current status and perspective]. Nihon Yakurigaku Zasshi 2002; 119:45-53. [PMID: 11862756 DOI: 10.1254/fpj.119.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The kallikrein-kinin system plays an important role in many physiological and pathophysiological conditions such as homeostasis of circulation, inflammation/allergy, pain, shock, etc. Two types of kinin receptor are known, bradykinin (BK) B1 receptor and BK B2 receptor. B2 receptors are constitutively expressed and mediate most physiological actions of kinins, whereas B1 receptors are highly inducible upon inflammatory stimulation or tissue injury, suggesting that they are involved in inflammation and/or nociception. Only three peptide type B2 antagonists, NPC 567, CP-0127 and HOE-140, have been evaluated in clinical studies so far, and some beneficial effects of B2 antagonists have been shown for rhinitis, asthma, systemic inflammatory response syndrome/sepsis and brain injury. However, the results were less convincing than expected. Now several potent and orally active nonpeptide B2-receptor antagonists have been found, which are expected to overcome the weak point of the peptide type antagonists and clarify the therapeutic potential of the B2-receptor antagonist for novel indications as well as those mentioned above. As for B1 receptors, no antagonist has been tested in a clinical trial. The important role of B1 receptors is just being elucidated by use of peptide type antagonists or B1 receptor gene knockout mice. The further development of newer B1 antagonists and clinical evaluation is desired.
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Affiliation(s)
- Yoshitaka Hirayama
- Medicinal Biology Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., 2-1-6, Kashima, Yodogawa-ku, Osaka 532-8514, Japan
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Witherow FN, Helmy A, Webb DJ, Fox KA, Newby DE. Bradykinin contributes to the vasodilator effects of chronic angiotensin-converting enzyme inhibition in patients with heart failure. Circulation 2001; 104:2177-81. [PMID: 11684627 DOI: 10.1161/hc4301.098252] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Bradykinin, an endogenous vasodilator peptide, is metabolized by ACE. The aims of the present study were to determine the doses of B9340, a bradykinin receptor antagonist, that inhibit vasodilatation to exogenous bradykinin and to assess the contribution of bradykinin to the maintenance of basal vascular tone in patients with heart failure receiving chronic ACE inhibitor therapy. METHODS AND RESULTS Forearm blood flow was measured using bilateral venous occlusion plethysmography. On three occasions in a double-blind randomized manner, 8 healthy volunteers received intrabrachial infusions of placebo or B9340 (at 4.5 and 13.5 nmol/min). On each occasion, placebo or B9340 was coinfused with bradykinin (30 to 3000 pmol/min) and substance P (4 to 16 pmol/min). B9340 caused no change in basal FBF but produced dose-dependent inhibition of the vasodilatation to bradykinin (P<0.001) but not substance P. The effects of bradykinin antagonism were studied in 17 patients with NYHA grade II through IV heart failure maintained on chronic ACE inhibitor therapy. Incremental doses of B9340, but not HOE-140, produced a dose-dependent vasoconstriction (P=0.01). After withdrawal of ACE inhibitor therapy, B9340 produced no significant change in forearm blood flow. After reinstitution of therapy, B9340 again resulted in vasoconstriction (P<0.03). CONCLUSIONS B9340 is a potent and selective inhibitor of bradykinin-induced vasodilatation. Bradykinin does not contribute to the maintenance of basal peripheral arteriolar tone in healthy humans or patients with heart failure but contributes to the vasodilatation associated with chronic ACE inhibitor therapy in patients with heart failure via the B(1) receptor.
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Affiliation(s)
- F N Witherow
- Department of Cardiovascular Research, University of Edinburgh, Royal Infirmary of Edinburgh, Scotland, UK
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Pan W, Kastin AJ, Gera L, Stewart JM. Bradykinin antagonist decreases early disruption of the blood-spinal cord barrier after spinal cord injury in mice. Neurosci Lett 2001; 307:25-8. [PMID: 11516566 DOI: 10.1016/s0304-3940(01)01904-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Bradykinin is one of the key molecules involved in the disruption of the blood-brain barrier and blood-spinal cord barrier occurring after spinal cord injury (SCI). Previously we have shown a biphasic opening of the blood-spinal cord barrier as well as increased transport of tumor necrosis factor-alpha (TNFalpha) after SCI by compression of the lumbar spinal cord in mice. To evaluate the role of bradykinin in the two phases of blood-spinal cord barrier disruption, we pretreated mice with a potent bradykinin antagonist, the decapeptide B9430, before SCI. Our results show that B9430 decreased the general blood-spinal cord barrier disruption occurring immediately after SCI but failed to affect the delayed opening of the blood-spinal cord barrier observed 72 h after SCI. By contrast, the entry of TNFalpha after SCI was not affected by B9430 treatment. We conclude that bradykinin is involved in the early phase of blood-spinal cord barrier disruption, with B9430 non-selectively blocking this early disruption without affecting the selective transport system for TNFalpha. This indicates the therapeutic potential of bradykinin antagonists in ameliorating tissue damage induced by SCI.
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Affiliation(s)
- W Pan
- VA Medical Center and Department of Medicine, Tulane University School of Medicine, 1601 Perdido Street, New Orleans, LA 70112, USA.
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Simpson PB, Woollacott AJ, Hill RG, Seabrook GR. Functional characterization of bradykinin analogues on recombinant human bradykinin B(1) and B(2) receptors. Eur J Pharmacol 2000; 392:1-9. [PMID: 10748265 DOI: 10.1016/s0014-2999(00)00046-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have examined the activity of a range of kinins on recombinant human bradykinin receptors, using a high throughput functional assay which measures intracellular Ca(2+) responses. The most potent agonist for Chinese hamster ovary (CHO) cells stably expressing recombinant human bradykinin B(1) receptors were Des-Arg(9)-bradykinin (EC(50)=7.9 nM) and Des-Arg(10)-kallidin (EC(50)=8.6 nM), while the most potent agonist for CHO cells expressing human bradykinin B(2) receptors was bradykinin (EC(50)=2.0 nM). These findings confirm the validity of the recombinant system and the microtitre plate imaging-based characterization system when compared to known agonist properties of the native receptors. The concentration-response relationship for bradykinin at bradykinin B(2) receptors was potently inhibited by [D-Arg(0),Hyp(3), beta-(2-thienyl)-Ala(5),D-Tic(7),Oic(8)]-bradykinin (Hoe140) (IC(50)=71 nM), which was 500-fold more potent against the B(2)-expressing cells than the B(1) cells. Bradykinin B(1) receptor-mediated responses activated by Des-Arg(10)-kallidin were fully antagonized by Des-Arg(9)-[Leu(8)]bradykinin (IC(50)=59 nM), Des-Arg(10)-Hoe140 (IC(50)=211 nM) and most potently by Lys-Lys-Arg-Pro-Hyp-Gly-Igl-Ser-D-Igl-Oic (B9858) (IC(50)=14 nM), none of which displayed any activity against the bradykinin B(2) receptor cell line up to 3 microM. None of the antagonists displayed partial agonism activity in these cell lines. All bradykinin B(1) and B(2) receptor antagonists tested acted in an apparently non-competitive manner that is likely to be due in part to their kinetics and to the nature of the functional assay used.
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Affiliation(s)
- P B Simpson
- Neuroscience Research Centre, Merck Sharp & Dohme Research Laboratories, Terlings Park, Eastwick Road, Harlow, UK.
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Stewart JM, Gera L, York EJ, Chan DC, Bunn P. Bradykinin antagonists: present progress and future prospects. IMMUNOPHARMACOLOGY 1999; 43:155-61. [PMID: 10596848 DOI: 10.1016/s0162-3109(99)00102-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bradykinin (BK) antagonist peptides have been powerful tools for delineating roles of kinins in both normal and pathological physiology and offer promise of drug development for a variety of inflammatory conditions and cancers. At the present time, potent peptide antagonists are available that are either specific for BK B1 or B2 receptors, or are effective on both receptor classes. Non-peptide BK B2 antagonists are now being announced and are under investigation in several companies. The best peptide B1-B2 peptide antagonist is stable against all kininases, is orally available, and has a very long lifetime in vivo. Certain dimers of this antagonist, as well as several smaller molecules, are active against several cancers, both in vitro and in vivo.
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Affiliation(s)
- J M Stewart
- Department of Biochemistry and Molecular Genetics, University of Colorado Medical School, Denver 80262, USA.
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Bandeira-Melo C, Calheiros AS, Silva PMR, Cordeiro RSB, Teixeira MM, Martins MA. Suppressive effect of distinct bradykinin B2 receptor antagonist on allergen-evoked exudation and leukocyte infiltration in sensitized rats. Br J Pharmacol 1999; 127:315-20. [PMID: 10385228 PMCID: PMC1566018 DOI: 10.1038/sj.bjp.0702536] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
1. Bradykinin is suggested to play a role in the pathophysiology of several acute and chronic diseases, including allergic disorders such as asthma. In the present study, we have investigated the importance of bradykinin in mediating allergic inflammation in rats. 2. To this end we have tested the effects of the B2 receptor antagonists Hoe 140, FR173657 or FR172357 on the pleural inflammatory response triggered by intrapleural (i.pl.) injection of allergen (ovalbumin, 12 microg cavity(-1)) in 14 day-actively sensitized Wistar rats. Analysis of the pleural fluid effluent revealed a sequence of mast cell-dependent inflammatory events, including early protein exudation and neutrophilia and late pleural eosinophil influx. 3. Local treatment with Hoe 140 (0.1 and 1 microg cavity(-1)), FR173657 (1 and 10 microg cavity(-1)) or FR172357 (1 and 10 microg cavity(-1)) inhibited dose-dependently allergen-induced mast cell activation with impairment of pleural plasma leakage, neutrophil accumulation and late eosinophil influx. 4. Moreover, the B2 receptor antagonists also dose-dependently inhibited the allergic like inflammatory pleurisy triggered by bradykinin (50 microg cavity(-1)), which is characterized by acute mast cell degranulation, protein leakage and pleural eosinophil infiltration. 5. Taken together, our findings provide substantial evidence to suggest that bradykinin acting on its B2 receptors play a critical role in mediating allergic mast cell-dependent inflammation in rats, and suggest that B2 receptor antagonists may be useful therapeutically to control allergic dysfunction.
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Affiliation(s)
- Christianne Bandeira-Melo
- Department of Physiology and Pharmacodynamics, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
| | - Andrea S Calheiros
- Department of Physiology and Pharmacodynamics, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
| | - Patricia M R Silva
- Department of Physiology and Pharmacodynamics, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
| | - Renato S B Cordeiro
- Department of Physiology and Pharmacodynamics, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
| | - Mauro M Teixeira
- Department of Pharmacology, Biological Sciences Institute, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Marco A Martins
- Department of Physiology and Pharmacodynamics, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
- Author for correspondence:
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Abstract
H-kininogen is a multifunctional protein: it inhibits cysteine proteases, plays a role in contact activation of the coagulation cascade, and is the precursor of the potent proinflammatory peptide bradykinin. In the experiments described here, we identify H-kininogen as a ferritin-binding protein. Ferritin is a cellular and serum protein that is elevated in acute and chronic inflammation and many cancers. Despite numerous reports of ferritin-binding protein(s) in human serum, the nature and function of these proteins remain unclear. As a first step in characterizing the interaction between ferritin and its binding protein(s), we devised a ligand blot assay and used it to guide purification of a ferritin-binding protein from human serum. Edman degradation of the purified protein determined the sequence HNLGHGHK(H)ERDQGHG, a sequence with identity to residues 421-436 of human H-kininogen. These results were confirmed by demonstrating that commercially purified H-kininogen possessed ferritin binding activity and that ferritin binding could not be detected in plasma from kininogen-deficient individuals. Ligand blot assays mapped the ferritin binding domain to the light chain of H-kininogen chain, and revealed that both H and L recombinant ferritins possess H-kininogen binding activity. The unexpected identification of H-kininogen as a ferritin-binding protein may link ferritin in the complex chain of interactions by which H-kininogen mediates its multiple effects in contact activation and inflammation.
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Affiliation(s)
- S V Torti
- Department of Biochemistry, Cancer Biology, Wake Forest University School of Medicine and the Comprehensive Cancer Center of Wake Forest University, Winston-Salem, North Carolina 27157, USA
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Stewart JM, Gera L, Chan DC, Whalley ET, Hanson WL, Zuzack JS. Potent, long-acting, orally-active bradykinin antagonists for a wide range of applications. IMMUNOPHARMACOLOGY 1997; 36:167-72. [PMID: 9228542 DOI: 10.1016/s0162-3109(97)00017-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Actions of bradykinin (Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg; BK) are mediated by constitutively expressed B2 receptors, that require the full BK peptide chain, and by B1 receptors, induced in inflammation, that use BK(1-8) as ligand. In addition to many physiological and pathophysiological functions, the growth factor activity of BK evidently allows it to act as an autocrine stimulant for small cell lung cancer. A new group of BK antagonists containing the novel amino acid a-(2-indanyl)glycine provides extremely potent broad-spectrum as well as selective antagonists for all these functions.
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Affiliation(s)
- J M Stewart
- Department of Biochemistry, University of Colorado Medical School, Denver 80262, USA.
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