1
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Xiang M, Wu L, Su H, Han B, Liu H, Xiao X, Yin X, Fan Y, Zhang L, Huang Y, Zhao L, Yang G. Biyuanling suppresses the toluene-2, 4-diisocyanate induced allergic rhinitis in guinea pigs. Oncotarget 2017; 9:12620-12629. [PMID: 29560095 PMCID: PMC5849159 DOI: 10.18632/oncotarget.23039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/13/2017] [Indexed: 12/19/2022] Open
Abstract
Allergic rhinitis (AR), one of the common diseases of the upper respiratory system, is associated with high risk of nasopharyngeal carcinoma. Biyuanling Granules (BLG), a formulated preparation of traditional Chinese medicine, has been used in China for treatment of AR for more than a decade; however, its exact action against allergic rhinitis and the mechanism involved remain unclear. In this study, we studied the effects of BLG on allergic rhinitis induced by toluene-2, 4- diisocyanate (TDI) in guinea pigs. The anti-AR effects of BLG were evaluated by behavior observations, histological examinations of the nasal tissues stained with hematoxylin and eosin staining (H&E), immunohistochemical analyses of pulmonary surfactant associated protein (SP), Bcl-2 Associated X Protei (Bax), tumor necrosis factor (TNF-α) and vascular cell adhesion molecule-1 (VCAM-1) in the nasal mucosa, and serum tests of interleukin-4 (IL-4) and human SARS-specific immunoglobulin (SIgE) levels. We observed that in the AR-positive animals treated with BLG, the symptom scores were significantly higher (P < 0.01), the nasal mucosa edemas and inflammatory infiltrates were significantly alleviated (P < 0.01) and the serum IL-4 and SIgE levels were significantly decreased (P < 0.05) as compared with the control group. Immunohistochemical examinations of the nasal mucosa demonstrated that the expressions of TNF-α, SP and VCAM-1 were significantly decreased (P < 0.01), whereas Bax expression was increased in the BLG treatment groups (P < 0.05). These results indicate that BLG can effectively suppress the TDI-induced AR, and that the protective effects of BLG were associated with reductions of TNF-α, SP and VCAM-1, and an elevation of Bax, suggesting that BLG exerts its AR-suppressive effects through inhibition of inflammatory response.
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Affiliation(s)
- Meixian Xiang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Li Wu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Hanwen Su
- Renmin Hospital of Wuhan University, 430060, Wuhan, PR China
| | - Bing Han
- Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Huanxiang Liu
- Renmin Hospital of Wuhan University, 430060, Wuhan, PR China
| | - Xincai Xiao
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Xian Yin
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Ya Fan
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Lang Zhang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Yuying Huang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
| | - Lei Zhao
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong university of Science and Technology, Wuhan, China, 430022, PR China
| | - Guangzhong Yang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 430074, Wuhan, PR China
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2
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Kandimalla SR, Sabitha G. Diversity-Oriented Synthesis of Oxacyclic Spirooxindole Derivatives through Ring-Closing Enyne Metathesis and Intramolecular Pauson-Khand (2+2+1) Cyclization of Oxindole Enynes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700511] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Satheeshkumar Reddy Kandimalla
- Natural Products Chemistry Division; CSIR - Indian Institute of Chemical Technology; Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi 110 025 India
| | - Gowravaram Sabitha
- Natural Products Chemistry Division; CSIR - Indian Institute of Chemical Technology; Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi 110 025 India
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3
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Guo Y, Zeng X, Yuan H, Huang Y, Zhao Y, Wu H, Yang J. Chiral recognition of phenylglycinol enantiomers based on N-acetyl-l-cysteine capped CdTe quantum dots in the presence of Ag . SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 183:23-29. [PMID: 28432917 DOI: 10.1016/j.saa.2017.04.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 04/11/2017] [Accepted: 04/14/2017] [Indexed: 06/07/2023]
Abstract
In this study, a novel method for chiral recognition of phenylglycinol (PG) enantiomers was proposed. Firstly, water-soluble N-acetyl-l-cysteine (NALC)-capped CdTe quantum dots (QDs) were synthesized and experiment showed that the fluorescence intensity of the reaction system slightly enhancement when added PG enantiomers to NALC-capped CdTe quantum dots (QDs), but the R-PG and S-PG could not be distinguished. Secondly, when there was Ag+ presence in the reaction system, the experiment result was extremely interesting, the PG enantiomers cloud make NALC-capped CdTe QDs produce different fluorescence signal, in which the fluorescence of S-PG+Ag++NALC-CdTe system was significantly enhanced, and the fluorescence of R-PG+Ag++NALC-CdTe system was markedly decreased. Thirdly, all the enhanced and decreased of the fluorescence intensity were directly proportional to the concentration of R-PG and S-PG in the linearly range 10-5-10-7mol·L-1, respectively. So, the new method for simultaneous determination of the PG enantiomers was built too. The experiment result of the method was satisfactory with the detection limit of PG can reached 10-7mol·L-1 and the related coefficient of S-PG and R-PG are 0.995 and 0.980, respectively. The method was highly sensitive, selective and had wider detection range compared with other methods.
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Affiliation(s)
- Yuan Guo
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China
| | - Xiaoqing Zeng
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China
| | - Haiyan Yuan
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China
| | - Yunmei Huang
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China
| | - Yanmei Zhao
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China
| | - Huan Wu
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China
| | - Jidong Yang
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, PR China; School of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing 400715, PR China; School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, PR China.
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4
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Gokara M, Narayana VV, Sadarangani V, Chowdhury SR, Varkala S, Ramachary DB, Subramanyam R. Unravelling the binding mechanism and protein stability of human serum albumin while interacting with nefopam analogues: a biophysical and insilico approach. J Biomol Struct Dyn 2016; 35:2280-2292. [PMID: 27453381 DOI: 10.1080/07391102.2016.1216895] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this study, molecular binding affinity was investigated for Nefopam analogues (NFs), a functionalized benzoxazocine, with human serum albumin (HSA), a major transport protein in the blood. Its binding affinity and concomitant changes in its conformation, binding site and simulations were also studied. Fluorescence data revealed that the fluorescence quenching of HSA upon binding of NFs analogues is based on a static mechanism. The three analogues of NFs binding constants (KA) are in the order of NF3 > NF2 > NF1 with values of 1.53 ± .057 × 104, 2.16 ± .071 × 104 and 3.6 ± .102 × 105 M-1, respectively. Concurrently, thermodynamic parameters indicate that the binding process was spontaneous, and the complexes were stabilized mostly by hydrophobic interactions, except for NF2 has one hydrogen bond stabilizes it along with hydrophobic interactions. Circular dichroism (CD) studies revealed that there is a decrease in α-helix with an increase in β-sheets and random coils signifying partial unfolding of the protein upon binding of NFs, which might be due to the formation of NFs-HSA complexes. Further, molecular docking studies showed that NF1, NF2 and NF3 bound to subdomains IIIA, IB and IIA through hydrophobic interactions. However, NF1 have additionally formed a single hydrogen bond with LYS 413. Furthermore, molecular simulations unveiled that NFs binding was in support with the structural perturbation observed in CD, which is evident from the root mean square deviation and Rg fluctuations. We hope our insights will provide ample scope for engineering new drugs based on the resemblances with NFs for enhanced efficacy with HSA.
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Affiliation(s)
- Mahesh Gokara
- a Department of Biochemistry , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
| | | | - Vineet Sadarangani
- a Department of Biochemistry , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
| | - Shatabdi Roy Chowdhury
- a Department of Biochemistry , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
| | - Sreelaxmi Varkala
- a Department of Biochemistry , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
| | | | - Rajagopal Subramanyam
- c Department of Plant Sciences , School of Life Sciences, University of Hyderabad , Hyderabad 500046 , India
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5
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Sivaguru P, Parameswaran K, Lalitha A. Synthesis of novel eight-membered dibenzo[b,f][1,5]oxazocin-6-ones. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.04.113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Srivastava SK, Ramaneti R, Roelse M, Tong HD, Vrouwe EX, Brinkman AGM, de Smet LCPM, van Rijn CJM, Jongsma MA. A generic microfluidic biosensor of G protein-coupled receptor activation – impedance measurements of reversible morphological changes of reverse transfected HEK293 cells on microelectrodes. RSC Adv 2015. [DOI: 10.1039/c5ra04976h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Flowcell with micro-IDEs (250–500 μm) covered with both stable and reverse transfected cells overexpressing membrane receptors to demonstrate impedance responses to serial injections of analyte.
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Affiliation(s)
- Saurabh K. Srivastava
- Plant Research International
- Wageningen UR
- 6708 PB Wageningen
- The Netherlands
- Laboratory of Organic Chemistry
| | | | - Margriet Roelse
- Plant Research International
- Wageningen UR
- 6708 PB Wageningen
- The Netherlands
| | | | | | - Aldo G. M. Brinkman
- Department of Chemical Engineering
- Delft University of Technology
- 2628 BL Delft
- The Netherlands
- NanoNextNL
| | - Louis C. P. M. de Smet
- Department of Chemical Engineering
- Delft University of Technology
- 2628 BL Delft
- The Netherlands
- NanoNextNL
| | - Cees J. M. van Rijn
- Laboratory of Organic Chemistry
- WageningenUR
- 6703 HB Wageningen
- The Netherlands
- Nanosens B.V
| | - Maarten A. Jongsma
- Plant Research International
- Wageningen UR
- 6708 PB Wageningen
- The Netherlands
- NanoNextNL
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7
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8
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Risatti C, Natalie KJ, Shi Z, Conlon DA. Development of a Scalable Route to a Dual NK-1/Serotonin Receptor Antagonist. Org Process Res Dev 2013. [DOI: 10.1021/op300323k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christina Risatti
- Chemical Development, Research & Development, Bristol-Myers Squibb Co., One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Kenneth J. Natalie
- Chemical Development, Research & Development, Bristol-Myers Squibb Co., One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - Zhongping Shi
- Chemical Development, Research & Development, Bristol-Myers Squibb Co., One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
| | - David A. Conlon
- Chemical Development, Research & Development, Bristol-Myers Squibb Co., One Squibb Drive, P.O. Box 191, New Brunswick, New Jersey 08903-0191, United States
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9
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A ring-closing metathesis approach to eight-membered benzannelated scaffolds and subsequent internal alkene isomerizations. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.12.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Allergic rhinitis: an update on disease, present treatments and future prospects. Int Immunopharmacol 2011; 11:1646-62. [PMID: 21784174 DOI: 10.1016/j.intimp.2011.07.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 06/21/2011] [Accepted: 07/06/2011] [Indexed: 11/20/2022]
Abstract
Allergic rhinitis (AR) is an inflammation of nasal mucosa mediated by IgE-associated processes occurring independently, or concurrently with asthma. AR is characterized by sensitization-formation and expression of antigen specific IgE, followed by inflammation in two phases. The early phase response involves cross linking of IgE molecules leading to degranulation of mast cells and release of preformed mediators such as histamine and tryptase, or newly synthesized mediators such as prostaglandins and leukotrienes. The late phase response is predominated by the presence of eosinophils, lymphocytes, cytokines, and adhesion molecules. Newer insights reveal that the whole phenomenon of immunological inflammation is intricately knit with neural pathways, which strongly influence the process. Furthermore, AR can impact psychological health and vice versa. Classical pharmacotherapy of AR includes use of oral or topical antihistamines, oral antileukotrienes, topical corticosteroids, mast cell stabilizers, decongestants, and an anticholinergic agent. Among immunomodulatory treatments, immunotherapy is gaining widespread use, while antibody treatment is restricted mainly to resistant cases. Several small molecules with improved safety profile, or targeting novel mechanisms are in the clinical research. Newer antihistamines and corticosteroids with improved safety profile and antagonists of the prostaglandin D(2) (CRTH2) receptors are likely to be available for clinical use in the near future. Lack of properly validated animal models and complexities associated with clinical evaluation are some of the challenges facing the researchers in AR. Comprehensive understanding of immunological and neurological processes in AR would facilitate the future quest for more effective and safer management of this disease.
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11
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Gerard B, Duvall JR, Lowe JT, Murillo T, Wei J, Akella LB, Marcaurelle LA. Synthesis of a stereochemically diverse library of medium-sized lactams and sultams via S(N)Ar cycloetherification. ACS COMBINATORIAL SCIENCE 2011; 13:365-74. [PMID: 21526820 DOI: 10.1021/co2000218] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have implemented an aldol-based "build/couple/pair" (B/C/P) strategy for the synthesis of stereochemically diverse 8-membered lactam and sultam scaffolds via S(N)Ar cycloetherification. Each scaffold contains two handles, an amine and aryl bromide, for solid-phase diversification via N-capping and Pd-mediated cross coupling. A sparse matrix design strategy that achieves the dual objective of controlling physicochemical properties and selecting diverse library members was implemented. The production of two 8000-membered libraries is discussed including a full analysis of library purity and property distribution. Library diversity was evaluated in comparison to the Molecular Library Small Molecule Repository (MLSMR) through the use of a multifusion similarity (MFS) map and principal component analysis (PCA).
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Affiliation(s)
- Baudouin Gerard
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
| | - Jeremy R. Duvall
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
| | - Jason T. Lowe
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
| | - Tiffanie Murillo
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
| | - Jingqiang Wei
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
| | - Lakshmi B. Akella
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
| | - Lisa A. Marcaurelle
- Chemical Biology Platform, The Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, Massachusetts 02142, United States
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12
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Huang SC, Korlipara VL. Neurokinin-1 receptor antagonists: a comprehensive patent survey. Expert Opin Ther Pat 2010; 20:1019-45. [DOI: 10.1517/13543776.2010.495121] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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V. Tverdokhlebov A, A. Chalyk B, T. Iminov R, A. Tolmachev A. Preparation of 5-Amino-1,2-dihydro-4-(1-methyl-4-piperidinyl)pyrrol-3-ones. HETEROCYCLES 2009. [DOI: 10.3987/com-09-11701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Ramachary DB, Narayana VV, Prasad MS, Ramakumar K. High-yielding synthesis of Nefopam analogues (functionalized benzoxazocines) by sequential one-pot cascade operations. Org Biomol Chem 2009; 7:3372-8. [DOI: 10.1039/b910397j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Dieltiens N, Stevens CV, Masschelein K, Hennebel G, Van der Jeught S. Ring-closing metathesis and ring-closing metathesis–isomerisation approach to 1-phosphonylated 2-benzazocines. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.02.074] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Araya I, Kanazawa S, Akita H. Process development and large-scale synthesis of NK1 antagonist. Chem Pharm Bull (Tokyo) 2008; 56:176-80. [PMID: 18239303 DOI: 10.1248/cpb.56.176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A scaleable synthetic route is described to obtain 2-(4-acetylpiperadin-1-yl)-6-[3,5-bis(trifluoromethyl)phenylmethyl]-4-(2-methylphenyl)-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,5]oxazocin-5-one (1, KRP-103) as a neurokinin (NK)(1) antagonist. The key step in the synthesis is the intramolecular cyclization of N-[3,5-bis(trifluoromethyl)phenylmethyl]-N-(3-hydroxypropyl)-4-chloro-6-(2-methylphenyl)-2-methylthiopyrimidine-5-carboxamide (15) which was obtained by amide formation between 4-(2-methylphenyl)-2-methylthio-6-oxo-1,6-dihydropyrimidine-5-carboxylic acid (8) and 3-[3,5-bis(trifluoromethyl)phenylmethylamino]-1-propanol (3). Treatment of 15 with 1,8-diazabicyclo[5,4,0]undec-7-ene provided 6-[3,5-bis(trifluoromethyl)phenylmethyl]-4-(2-methylphenyl)-2-methylthio-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,5]oxazocin-5-one (6). This intermediate (6) is transformed into the candidate compound (1) by two steps; oxidation, and substitution reaction of the resultant sulfone (7) with 1-acetylpiperazine. This synthetic method is free of chromatographic purification and is amenable to large scale synthesis.
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Affiliation(s)
- Ichiro Araya
- Research Center, Kyorin Pharmaceutical Co., Ltd., Nogi-machi, Shimotsuga-gun, Tochigi, Japan.
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17
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18
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Bauer JD, Sunman JA, Foster MS, Thompson JR, Ogonowski AA, Cutler SJ, May SW, Pollock SH. Anti-inflammatory effects of 4-phenyl-3-butenoic acid and 5-(acetylamino)-4-oxo-6-phenyl-2-hexenoic acid methyl ester, potential inhibitors of neuropeptide bioactivation. J Pharmacol Exp Ther 2006; 320:1171-7. [PMID: 17138865 DOI: 10.1124/jpet.106.110940] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Substance P (SP) and calcitonin gene-related peptide (CGRP) are well established mediators of inflammation. Therefore, inhibition of the biosynthesis of these neuropeptides is an attractive potential strategy for pharmacological intervention against a number of inflammatory diseases. The final step in the biosynthesis of SP and CGRP is the conversion of their glycine-extended precursors to the active amidated peptide, and this process is catalyzed by sequential action of the enzymes peptidylglycine alpha-monooxygenase (PAM) and peptidylamidoglycolate lyase. We have demonstrated previously that 4-phenyl-3-butenoic acid (PBA) is a PAM inhibitor, and we have also shown that in vivo inhibition of serum PAM by PBA correlates with this compound's ability to inhibit carrageenan-induced edema in the rat. Here we demonstrate the ability of PBA to inhibit all three phases of adjuvant-induced polyarthritis (AIP) in rats; this represents the first time that an amidation inhibitor has been shown to be active in a model of chronic inflammation. We recently introduced 5-(acetylamino)-4-oxo-6-phenyl-2-hexenoic acid (AOPHA) as one of a new series of mechanism-based amidation inhibitors. We now report for the first time that AOPHA and its methyl ester (AOPHA-Me) are active inhibitors of serum PAM in vivo, and we show that AOPHA-Me correspondingly inhibits carrageenan-induced edema in rats in a dose-dependent manner. Neither PBA nor AOPHA-Me exhibits significant cyclooxygenase (COX) inhibition in vitro; thus, the anti-inflammatory activities of PBA and AOPHA-Me are apparently not a consequence of COX inhibition. We discuss possible pharmacological mechanisms that may account for the activities of these new anti-inflammatory compounds.
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MESH Headings
- Adjuvants, Immunologic
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/chemistry
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Anti-Inflammatory Agents, Non-Steroidal/therapeutic use
- Arthritis, Experimental/drug therapy
- Arthritis, Experimental/metabolism
- Caproates/chemistry
- Caproates/pharmacology
- Caproates/therapeutic use
- Cyclooxygenase 1/blood
- Cyclooxygenase 1/metabolism
- Cyclooxygenase 2/blood
- Cyclooxygenase 2/metabolism
- Dose-Response Relationship, Drug
- Edema/drug therapy
- Edema/metabolism
- Esters/chemistry
- Esters/pharmacology
- Esters/therapeutic use
- Fatty Acids, Monounsaturated/chemistry
- Fatty Acids, Monounsaturated/pharmacology
- Fatty Acids, Monounsaturated/therapeutic use
- Group II Phospholipases A2
- Humans
- In Vitro Techniques
- Male
- Molecular Structure
- Neuropeptides/metabolism
- Phospholipases A/metabolism
- Rats
- Rats, Sprague-Dawley
- Sciatic Nerve/metabolism
- Substance P/metabolism
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Affiliation(s)
- John D Bauer
- Department of Pharmaceutical Sciences, Mercer University College of Pharmacy and Health Sciences, Atlanta, GA 30341, USA
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19
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Seto S, Tanioka A, Ikeda M, Izawa S. Design, synthesis, and evaluation of novel 2-substituted-4-aryl-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,5]oxazocin-5-ones as NK1 antagonists. Bioorg Med Chem 2005; 13:5717-32. [PMID: 15993086 DOI: 10.1016/j.bmc.2005.06.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Revised: 05/27/2005] [Accepted: 06/01/2005] [Indexed: 11/19/2022]
Abstract
A series of novel bicyclic pyrimidine derivatives was prepared as part of a search for NK1 antagonist aimed at the treatment of urinary incontinence. Among them, 3g, a pyrimido[4,5-b][1,5]oxazocine derivative, bearing a 4-acetylpiperazinyl group and a 2-methylphenyl group, was shown to have potent NK1 antagonist activity with a K(B) value of 0.105 nM and markedly increased the effective bladder capacity of guinea pigs (59.4% at 0.3 mg/kg iv and 62.8% at 3 mg/kg id). Furthermore, the effect of 3g on bladder function appeared to differ from that of tolterodine, another classical anti-pollakiuria agent, as determined by the distention-induced rhythmic bladder contraction assay using a urethane-anesthetized guinea pig model. Compound 3g is expected to be a promising agent for the treatment of urinary incontinence.
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Affiliation(s)
- Shigeki Seto
- Discovery Research Laboratories, Kyorin Pharmaceutical Co., Ltd., 2399-1, Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan.
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20
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Seto S, Tanioka A, Ikeda M, Izawa S. 2-Substituted-4-aryl-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,5]oxazocin-5-one as a structurally new NK1 antagonist. Bioorg Med Chem Lett 2005; 15:1485-8. [PMID: 15713412 DOI: 10.1016/j.bmcl.2004.12.089] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Accepted: 12/28/2004] [Indexed: 11/17/2022]
Abstract
The structurally novel pyrimido[4,5-b][1,5]oxazocine derivative 3, a hybrid compound of pyrido[4,3-b]- and [2,3-b]-1,5-oxazocine (1 and 2, respectively), was designed and synthesized. We examined the atropisomeric property and the NK1 antagonist activity of 3. Compound 3 was found to possess both a feature of 1, free rotation about the biaryl bond, and a feature of 2, potent in vivo activity.
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Affiliation(s)
- Shigeki Seto
- Discovery Research Laboratories, Kyorin Pharmaceutical Co., Ltd, 2399-1, Nogi, Nogi-machi, Shimotsuga-gun, Tochigi 329-0114, Japan.
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