1
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Ortega-Valdovinos LR, Chino-Cruz JG, Yatsimirsky AK. Zwitterion-neutral form equilibria and binding selectivity of pyridineboronic acids. Org Biomol Chem 2023; 21:7395-7409. [PMID: 37661801 DOI: 10.1039/d3ob01211e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
A 11B NMR study of 3-pyridineboronic acid at variable pH in water and 50 vol% aqueous dioxane confirms that the tautomeric equilibrium of the acid is shifted to the zwitterionic form in water, but to the molecular form in the mixed organic solvent. Interactions of 3- and 4-pyridineboronic acids with sialic acid, fructose and several other diols were studied by potentiometric titrations in a wide range of pH in water and water-organic mixtures. In all reaction media the stability of boronate complexes increases upon an increase in pH for neutral low acidic diols such as fructose and glucose but has the opposite trend for highly acidic sialic and lactic acids occurring as anionic species. The selectivity of pyridineboronic acids to sialate anions in an acidic medium is interpreted quantitatively by combining the pH-profiles with Brønsted type correlations for binding constants. In addition, mathematical expressions allowing one to predict the optimum pKa value of a boronic acid for the strongest binding of a given diol (sialic acid or fructose) at a given pH are suggested. The shifts in the tautomeric equilibrium induced by changing the solvent polarity in aqueous-organic mixtures are manifested in the magnitude of relative shifts of pKa of pyridineboronic acids induced by diol complexation.
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Affiliation(s)
| | | | - Anatoly K Yatsimirsky
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D. F., Mexico.
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2
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Slowik EJ, Stankoska K, Bui NN, Pasieka B, Conrad D, Zapp J, Hoth M, Bogeski I, Kappl R. The calcium channel modulator 2-APB hydrolyzes in physiological buffers and acts as an effective radical scavenger and inhibitor of the NADPH oxidase 2. Redox Biol 2023; 61:102654. [PMID: 36889081 PMCID: PMC10009725 DOI: 10.1016/j.redox.2023.102654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/20/2023] [Accepted: 03/02/2023] [Indexed: 03/06/2023] Open
Abstract
2-aminoethoxydiphenyl borate (2-APB) is commonly used as a tool to modulate calcium signaling in physiological studies. 2-APB has a complex pharmacology and acts as activator or inhibitor of a variety of Ca2+ channels and transporters. While unspecific, 2-APB is one of the most-used agents to modulate store-operated calcium entry (SOCE) mediated by the STIM-gated Orai channels. Due to its boron core structure, 2-APB tends to readily hydrolyze in aqueous environment, a property that results in a complex physicochemical behavior. Here, we quantified the degree of hydrolysis in physiological conditions and identified the hydrolysis products diphenylborinic acid and 2-aminoethanol by NMR. Notably, we detected a high sensitivity of 2-APB/diphenylborinic acid towards decomposition by hydrogen peroxide to compounds such as phenylboronic acid, phenol, and boric acid, which were, in contrast to 2-APB itself and diphenylborinic acid, insufficient to affect SOCE in physiological experiments. Consequently, the efficacy of 2-APB as a Ca2+ signal modulator strongly depends on the reactive oxygen species (ROS) production within the experimental system. The antioxidant behavior of 2-APB towards ROS and its resulting decomposition are inversely correlated to its potency to modulate Ca2+ signaling as shown by electron spin resonance spectroscopy (ESR) and Ca2+ imaging. Finally, we observed a strong inhibitory effect of 2-APB, i.e., its hydrolysis product diphenylborinic acid, on NADPH oxidase (NOX2) activity in human monocytes. These new 2-APB properties are highly relevant for Ca2+ and redox signaling studies and for pharmacological application of 2-APB and related boron compounds.
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Affiliation(s)
- Ewa Jasmin Slowik
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany
| | - Katerina Stankoska
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany
| | - Nhat Nguyen Bui
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany
| | - Bastian Pasieka
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany
| | - David Conrad
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany; Department of Anaesthesiology, Intensive Care and Pain Therapy, Saarland University Medical Center, Saarland University Faculty of Medicine, 66421, Homburg, Germany
| | - Josef Zapp
- Department of Pharmaceutical Biology, Saarland University, 66123, Saarbrücken, Germany
| | - Markus Hoth
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany
| | - Ivan Bogeski
- Molecular Physiology, Department of Cardiovascular Physiology, UMG, 37073, Göttingen, Germany
| | - Reinhard Kappl
- Department of Biophysics, Faculty of Medicine, Center for Integrative Physiology and Molecular Medicine (CIPMM), Saarland University, 66421, Homburg, Germany.
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3
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Photopharmacological modulation of native CRAC channels using azoboronate photoswitches. Proc Natl Acad Sci U S A 2022; 119:e2118160119. [PMID: 35312368 PMCID: PMC9060504 DOI: 10.1073/pnas.2118160119] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Calcium release–activated calcium (CRAC) channels play key roles in the regulation of cellular signaling, transcription, and migration. Here, we describe the design, chemical synthesis, and characterization of photoswitchable channel inhibitors that can be switched on and off depending on the wavelength of light used. We use the compounds to induce light-dependent modulation of channel activity and downstream gene expression in human immune cells. We further expand the usage of the compounds to control seeding of cancer cells in target tissue and regulation of response to noxious stimuli in vivo in mice. Store-operated calcium entry through calcium release–activated calcium (CRAC) channels replenishes intracellular calcium stores and plays a critical role in cellular calcium signaling. CRAC channels are activated by tightly regulated interaction between the endoplasmic reticulum (ER) calcium sensor STIM proteins and plasma membrane (PM) Orai channels. Our current understanding of the role of STIM–Orai-dependent calcium signals under physiologically relevant conditions remains limited in part due to a lack of spatiotemporally precise methods for direct manipulation of endogenous CRAC channels. Here, we report the synthesis and characterization of azoboronate light-operated CRAC channel inhibitors (LOCIs) that allow for a dynamic and fully reversible remote modulation of the function of native CRAC channels using ultraviolet (UV) and visible light. We demonstrate the use of LOCI-1 to modulate gene expression in T lymphocytes, cancer cell seeding at metastatic sites, and pain-related behavior.
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4
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Arakawa N, Nagao K, Murakami R, Sumida Y, Arakawa H, Inagaki F, Ohmiya H. Aliphatic Oxaboroles Enabling Remarkable Recognition of Diols. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Nozomi Arakawa
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Kazunori Nagao
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Ryo Murakami
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Yuto Sumida
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hiroshi Arakawa
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Fuyuhiko Inagaki
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Hirohisa Ohmiya
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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5
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Baraniak MK, Lalancette RA, Jäkle F. Electron‐Deficient Borinic Acid Polymers: Synthesis, Supramolecular Assembly, and Examination as Catalysts in Amide Bond Formation. Chemistry 2019; 25:13799-13810. [DOI: 10.1002/chem.201903196] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/10/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Monika K. Baraniak
- Department of ChemistryRutgers University-Newark 73 Warren Street Newark NJ 07102 USA
| | - Roger A. Lalancette
- Department of ChemistryRutgers University-Newark 73 Warren Street Newark NJ 07102 USA
| | - Frieder Jäkle
- Department of ChemistryRutgers University-Newark 73 Warren Street Newark NJ 07102 USA
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6
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Robole ZM, Rahn KL, Lampkin BJ, Anand RK, VanVeller B. Tuning the Electrochemical Redox Potentials of Catechol with Boronic Acid Derivatives. J Org Chem 2019; 84:2346-2350. [DOI: 10.1021/acs.joc.8b03087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zachary M. Robole
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Kira L. Rahn
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Bryan J. Lampkin
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Robbyn K. Anand
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Brett VanVeller
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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7
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Zhang Q, Mischnick P. Borate-Mediated Stereo- and Topo-Selective Methylation of 1,4-β-Glucomannan. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201700502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Qimeng Zhang
- Institute of Food Chemistry; Technische Universität Braunschweig; Schleinitzstr. 20 D-38106 Braunschweig Germany
| | - Petra Mischnick
- Institute of Food Chemistry; Technische Universität Braunschweig; Schleinitzstr. 20 D-38106 Braunschweig Germany
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8
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Shimomura N, Egawa Y, Miki R, Fujihara T, Ishimaru Y, Seki T. A red fluorophore comprising a borinate-containing xanthene analogue as a polyol sensor. Org Biomol Chem 2018; 14:10031-10036. [PMID: 27714219 DOI: 10.1039/c6ob01695b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A xanthene derivative containing a borinate moiety emitted red fluorescence with a high quantum yield. The interaction between the borinate and a sugar molecule induced a fluorescence change based on the change in the HOMO-LUMO gap. The response was pH-resistant in a wide range. In addition, catechol quenched through photoinduced electron transfer. The red fluorescence and polyol binding ability of dyes will pave the way for new biological applications of chemical sensors.
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Affiliation(s)
- N Shimomura
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Y Egawa
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - R Miki
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - T Fujihara
- Research and Development Bureau, Comprehensive Analysis Center for Science, Saitama University, Shimo-ohkubo 255, Sakura-ku, Saitama, Saitama 338-8570, Japan
| | - Y Ishimaru
- Division of Material Science, Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama, Saitama 338-8570, Japan
| | - T Seki
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
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9
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Song W, Zheng N. Chiral catalyst-directed site-selective functionalization of hydroxyl groups in carbohydrates. J Carbohydr Chem 2017. [DOI: 10.1080/07328303.2017.1390575] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Wangze Song
- School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, P.R. China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, P.R. China
| | - Nan Zheng
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, P.R. China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, P.R. China
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10
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Wan WM, Li SS, Liu DM, Lv XH, Sun XL. Synthesis of Electron-Deficient Borinic Acid Polymers with Multiresponsive Properties and Their Application in the Fluorescence Detection of Alizarin Red S and Electron-Rich 8-Hydroxyquinoline and Fluoride Ion: Substituent Effects. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Wen-Ming Wan
- State Key Laboratory of Heavy
Oil Processing, Centre for Bioengineering and Biotechnology, and College
of Science, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development
Zone, Qingdao, Shandong 266580, People’s Republic of China
| | - Shun-Shun Li
- State Key Laboratory of Heavy
Oil Processing, Centre for Bioengineering and Biotechnology, and College
of Science, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development
Zone, Qingdao, Shandong 266580, People’s Republic of China
| | - Dong-Ming Liu
- State Key Laboratory of Heavy
Oil Processing, Centre for Bioengineering and Biotechnology, and College
of Science, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development
Zone, Qingdao, Shandong 266580, People’s Republic of China
| | - Xin-Hu Lv
- State Key Laboratory of Heavy
Oil Processing, Centre for Bioengineering and Biotechnology, and College
of Science, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development
Zone, Qingdao, Shandong 266580, People’s Republic of China
| | - Xiao-Li Sun
- State Key Laboratory of Heavy
Oil Processing, Centre for Bioengineering and Biotechnology, and College
of Science, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development
Zone, Qingdao, Shandong 266580, People’s Republic of China
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11
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Lv XH, Li SS, Tian CY, Yang MM, Li C, Zhou Y, Sun XL, Zhang J, Wan WM. Borinic Acid Polymer: Simplified Synthesis and Enzymatic Biofuel Cell Application. Macromol Rapid Commun 2017; 38. [PMID: 28169485 DOI: 10.1002/marc.201600687] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Indexed: 12/29/2022]
Abstract
A simplified one-pot and less harmful method has been introduced for the synthesis of borinic acid monomer. The corresponding borinic acid polymer (PBA) has been prepared by reversible addition-fragmentation chain transfer polymerization. Property investigations confirm the characteristics of PBA as a new type of "smart material" in the field of thermo-responsive polymer. The potential application of PBA in the field of enzymatic biofuel cell has been illustrated with a wide open circuit potential of 0.92 V.
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Affiliation(s)
- Xin-Hu Lv
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Shun-Shun Li
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Cong-Yu Tian
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Mao-Mao Yang
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Cheng Li
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yan Zhou
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Xiao-Li Sun
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Jun Zhang
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
| | - Wen-Ming Wan
- State Key Laboratory of Heavy Oil Processing, Centre for Bioengineering and Biotechnology, and College of Science, China University of Petroleum (East China), Qingdao, 266580, China
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12
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Garrett GE, Tanveer K, Taylor MS. Mechanism of an Organoboron-Catalyzed Domino Reaction: Kinetic and Computational Studies of Borinic Acid-Catalyzed Regioselective Chloroacylation of 2,3-Epoxy Alcohols. J Org Chem 2017; 82:1085-1095. [DOI: 10.1021/acs.joc.6b02702] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Graham E. Garrett
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6 Canada
| | - Kashif Tanveer
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6 Canada
| | - Mark S. Taylor
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6 Canada
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13
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Tong ML, Huber F, Taghuo Kaptouom ES, Cellnik T, Kirsch SF. Enhanced site-selectivity in acylation reactions with substrate-optimized catalysts on solid supports. Chem Commun (Camb) 2017; 53:3086-3089. [DOI: 10.1039/c7cc00655a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A concept for site-selective acylation is presented, using substrate-optimized DMAP–peptide conjugates on a solid support.
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Affiliation(s)
- My Linh Tong
- Organic Chemistry
- Bergische Universität Wuppertal
- 42119 Wuppertal
- Germany
| | - Florian Huber
- Organic Chemistry
- Bergische Universität Wuppertal
- 42119 Wuppertal
- Germany
| | | | - Torsten Cellnik
- Organic Chemistry
- Bergische Universität Wuppertal
- 42119 Wuppertal
- Germany
| | - Stefan F. Kirsch
- Organic Chemistry
- Bergische Universität Wuppertal
- 42119 Wuppertal
- Germany
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14
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15
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El Dine TM, Rouden J, Blanchet J. Borinic acid catalysed peptide synthesis. Chem Commun (Camb) 2016; 51:16084-7. [PMID: 26390250 DOI: 10.1039/c5cc06177f] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic synthesis of peptides is a major challenge in the modern organic chemistry hindered by the well-established use of stoichiometric coupling reagents. Herein, we describe for the first time that borinic acid is able to catalyse this reaction under mild conditions with an improved activity compared to our recently developed thiophene-based boronic acid. This catalyst is particularly efficient for peptide bond synthesis affording dipeptides in good yields without detectable racemization.
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Affiliation(s)
- Tharwat Mohy El Dine
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Normandie, CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France.
| | - Jacques Rouden
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Normandie, CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France.
| | - Jérôme Blanchet
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Normandie, CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France.
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16
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Rao NZ, Larkin JD, Bock CW. A Comparison of the Structure and Bonding in the Aliphatic Boronic R-B(OH) 2 and Borinic R-BH(OH) acids (R=H; NH 2, OH, and F): A Computational Investigation. Struct Chem 2016; 27:1081-1091. [PMID: 29805241 PMCID: PMC5967406 DOI: 10.1007/s11224-015-0730-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 12/15/2015] [Indexed: 10/22/2022]
Abstract
Boronic acids, R-B(OH)2, play an important role in synthetic, biological, medicinal, and materials chemistry. This investigation compares the structure and bonding surrounding the boron atoms in the simple aliphatic boronic acids, R-B(OH)2 (R = H; NH2, OH, and F) and the analogous borinic acids, R-BH(OH). Geometry optimizations were performed using second-order Møller-Plesset perturbation theory (MP2) with the Dunning-Woon aug-cc-pVTZ, aug-cc-pVQZ and aug-cc-pV5Z basis sets; single-point CCSD(FC)/aug-cc-pVTZ//MP2(FC)/aug-cc-pVTZ level calculations were used to generate a QCI density for Natural Bond Orbital analyses of the bonding. The optimized boron-oxygen bond lengths for the X-B-Ot-H trans-branch of the endo-exo form of the boronic acids and for the X-B-O-H cis-branch of the boronic and borinic acids (X = N, O, and F respectively) decrease as the electronegativity of X increases. The boron-oxygen bond lengths are generally longer in the endo-exo or anti forms of the boronic acids than in the corresponding borinic acids. NBO analyses suggest the boron-oxygen bond in H2BOH is a double bond; the boron-oxygen bonding in the remaining boronic and borinic acids in this study have a significant contribution from dative pπ-pπ bonding. Values for [Formula: see text] for the highly balanced reaction, R-B(OH)2 + R-BH2 → 2 R-BH(OH), suggest that the bonding surrounding the boron atom is stronger in the borinic acid than in the corresponding boronic acid.
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Affiliation(s)
- Niny Z. Rao
- Department of Chemistry and Biochemistry, College of Science, Health and the Liberal Arts, Philadelphia University, 4201 Henry Avenue, Philadelphia, PA 19144
| | | | - Charles W. Bock
- Department of Chemistry and Biochemistry, College of Science, Health and the Liberal Arts, Philadelphia University, 4201 Henry Avenue, Philadelphia, PA 19144
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17
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Sun XL, Liu DM, Lv XH, Zhou P, Sun M, Wan WM. Thermo-responsive rheological behavior of borinic acid polymer in dilute solution. RSC Adv 2016. [DOI: 10.1039/c6ra18117a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Borinic acid polymer is rheologically thermo-responsive in solution, which expands its application as a new type of “smart” polymer.
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Affiliation(s)
- X. L. Sun
- State Key Laboratory of Heavy Oil Processing
- Centre for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - D. M. Liu
- State Key Laboratory of Heavy Oil Processing
- Centre for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - X. H. Lv
- State Key Laboratory of Heavy Oil Processing
- Centre for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - P. Zhou
- State Key Laboratory of Heavy Oil Processing
- Centre for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - M. Sun
- Institute of Chemical Engineering and Materials
- Yantai University
- Yantai
- China
| | - W. M. Wan
- State Key Laboratory of Heavy Oil Processing
- Centre for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
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18
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Wan WM, Zhou P, Cheng F, Sun XL, Lv XH, Li KK, Xu H, Sun M, Jäkle F. Thermo-responsive behavior of borinic acid polymers: experimental and molecular dynamics studies. SOFT MATTER 2015; 11:7159-7164. [PMID: 26256052 DOI: 10.1039/c5sm01464f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The thermo-responsive properties of borinic acid polymers were investigated by experimental and molecular dynamics simulation studies. The homopolymer poly(styrylphenyl(tri-iso-propylphenyl)borinic acid) (PBA) exhibits an upper critical solution temperature (UCST) in polar organic solvents that is tunable over a wide temperature range by addition of small amounts of H2O. The UCST of a 1 mg mL(-1) PBA solution in DMSO can be adjusted from 20 to 100 °C by varying the H2O content from ∼0-2.5%, in DMF from 0 to 100 °C (∼3-17% H2O content), and in THF from 0 to 60 °C (∼4-19% H2O). The UCST increases almost linearly from the freezing point of the solvent with higher freezing point to the boiling point of the solvent with the lower boiling point. The mechanistic aspects of this process were investigated by molecular dynamics simulations. The latter indicate rapid and strong hydrogen-bond formation between BOH moieties and H2O molecules, which serve as crosslinkers to form an insoluble network. Our results suggest that borinic acid-containing polymers are promising as new "smart" materials, which display thermo-responsive properties that are tunable over a wide temperature range.
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Affiliation(s)
- Wen-Ming Wan
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao, Shandong 266580, People's Republic of China.
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19
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Marciasini L, Cacciuttolo B, Vaultier M, Pucheault M. Synthesis of Borinic Acids and Borinate Adducts Using Diisopropylaminoborane. Org Lett 2015; 17:3532-5. [PMID: 26183591 DOI: 10.1021/acs.orglett.5b01620] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In situ formation of aryl Grignard under Barbier condition and diisopropylaminoborane as boron source allows a complete control of the addition onto the boron electrophile. Analytically pure borinic acid derivatives were produced at the gram scale without column chromatography and isolated as borinates adducts, with ethanolamine or 8-hydroxyquinoline, after workup.
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Affiliation(s)
- Ludovic Marciasini
- Institut des Sciences Moléculaires, UMR 5255, Université de Bordeaux, IPB, CNRS, 351 Cours de la libération, F-33405 Talence Cedex, France
| | - Bastien Cacciuttolo
- Institut des Sciences Moléculaires, UMR 5255, Université de Bordeaux, IPB, CNRS, 351 Cours de la libération, F-33405 Talence Cedex, France
| | - Michel Vaultier
- Institut des Sciences Moléculaires, UMR 5255, Université de Bordeaux, IPB, CNRS, 351 Cours de la libération, F-33405 Talence Cedex, France
| | - Mathieu Pucheault
- Institut des Sciences Moléculaires, UMR 5255, Université de Bordeaux, IPB, CNRS, 351 Cours de la libération, F-33405 Talence Cedex, France
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20
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Taylor MS. Catalysis based on reversible covalent interactions of organoboron compounds. Acc Chem Res 2015; 48:295-305. [PMID: 25493641 DOI: 10.1021/ar500371z] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
CONSPECTUS: An Account of the development of organoboron-catalyzed methods for chemo- or regioselective activation of pyruvic acids, diols, and carbohydrate derivatives is presented. These methods are based on reversible, covalent interactions that have been exploited extensively in host-guest chemistry, but were comparatively underutilized in catalysis. Important differences between the established properties of organboron compounds in molecular recognition and their behavior as catalysts emerged over the course of this work: for instance, borinic acids, which have largely been ignored in molecular recognition, proved to be a particularly useful class of catalysts. Nonetheless, the high selectivity that has enabled applications of organoboron compounds in molecular recognition (e.g., the selective binding of cis-1,2-diol groups in carbohydrates) also appears to play a key role in the outcomes of catalytic reactions. This research program began as a modest, narrowly defined project aimed at developing direct aldol reactions based on established interactions between pyruvic acids and boronic acids. While this goal was achieved, it was unexpected observations related to the nature of the nucleophile in this transformation (a putative tetracoordinate boron enolate) that attracted our attention and pointed toward broader applications in the catalyst-controlled, regioselective functionalization of polyols. This line of research proved to be fruitful: diarylborinic-acid-based precatalysts were found to promote efficient monoalkylations, sulfonylations, and alkylations of a range of diol substrates, as well as cis-1,2-diol motifs in pyranoside-derived triols. Extension of this chemistry to glycosyl donors as electrophiles enabled the regioselective, catalyst-controlled synthesis of disaccharides from readily accessible feedstocks, and was also employed to modify the oligosaccharide component of a complex, glycosylated natural product. Mechanistic studies have played an important role in our efforts to optimize catalyst activity and expand substrate scope for this class of transformations. For instance, it was kinetic studies of the sulfonylation of diols that motivated us to investigate heteroboraanthracene-derived borinic acids as catalysts, despite their low affinity for these substrates. Likewise, preliminary studies suggesting an SN2-type pathway for organoboron-catalyzed glycosylations were instrumental in our development of a method for selective formation of β-2-deoxyglycosides. Details of these mechanistic studies, along with prospects for applying catalyst-controlled glycosylation in oligosaccharide synthesis and natural product glycorandomization, are discussed.
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Affiliation(s)
- Mark S. Taylor
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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21
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Cheng F, Wan WM, Zhou Y, Sun XL, Bonder EM, Jäkle F. Borinic acid block copolymers: new building blocks for supramolecular assembly and sensory applications. Polym Chem 2015. [DOI: 10.1039/c5py00607d] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Borinic acid functional groups were incorporated into block copolymers via RAFT polymerization and their supramolecular assembly and sensor applications were investigated.
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Affiliation(s)
- Fei Cheng
- Department of Chemistry
- Rutgers University Newark
- Newark
- USA
| | - Wen-Ming Wan
- Department of Chemistry
- Rutgers University Newark
- Newark
- USA
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology
| | - Yan Zhou
- State Key Laboratory of Heavy Oil Processing and Centre for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - Xiao-Li Sun
- Department of Material Physics and Chemistry
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - Edward M. Bonder
- Department of Biological Sciences
- Rutgers University-Newark
- 195 University Avenue
- Newark
- USA
| | - Frieder Jäkle
- Department of Chemistry
- Rutgers University Newark
- Newark
- USA
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22
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Wan WM, Cheng F, Jäkle F. A Borinic Acid Polymer with Fluoride Ion- and Thermo-responsive Properties that are Tunable over a Wide Temperature Range. Angew Chem Int Ed Engl 2014; 53:8934-8. [DOI: 10.1002/anie.201403703] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/13/2014] [Indexed: 11/11/2022]
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23
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Wan WM, Cheng F, Jäkle F. A Borinic Acid Polymer with Fluoride Ion- and Thermo-responsive Properties that are Tunable over a Wide Temperature Range. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403703] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Rajabi F, Thiel WR. An Efficient Palladium N-Heterocyclic Carbene Catalyst Allowing the Suzuki-Miyaura Cross-Coupling of Aryl Chlorides and Arylboronic Acids at Room Temperature in Aqueous Solution. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300841] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Martínez-Aguirre MA, Villamil-Ramos R, Guerrero-Alvarez JA, Yatsimirsky AK. Substituent Effects and pH Profiles for Stability Constants of Arylboronic Acid Diol Esters. J Org Chem 2013; 78:4674-84. [DOI: 10.1021/jo400617j] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
| | - Raul Villamil-Ramos
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos,
62209 Cuernavaca, Morelos, Mexico
| | - Jorge A. Guerrero-Alvarez
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos,
62209 Cuernavaca, Morelos, Mexico
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26
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Hofer A, Kovacs G, Zappatini A, Leuenberger M, Hediger MA, Lochner M. Design, synthesis and pharmacological characterization of analogs of 2-aminoethyl diphenylborinate (2-APB), a known store-operated calcium channel blocker, for inhibition of TRPV6-mediated calcium transport. Bioorg Med Chem 2013; 21:3202-13. [PMID: 23602525 DOI: 10.1016/j.bmc.2013.03.037] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 03/07/2013] [Accepted: 03/14/2013] [Indexed: 10/27/2022]
Abstract
2-Aminoethyl diphenylborinate (2-APB) is a known modulator of the IP3 receptor, the calcium ATPase SERCA, the calcium release-activated calcium channel Orai and TRP channels. More recently, it was shown that 2-APB is an efficient inhibitor of the epithelial calcium channel TRPV6 which is overexpressed in prostate cancer. We have conducted a structure-activity relationship study of 2-APB congeners to understand their inhibitory mode of action on TRPV6. Whereas modifying the aminoethyl moiety did not significantly change TRPV6 inhibition, substitution of the phenyl rings of 2-APB did. Our data show that the diaryl borinate moiety is required for biological activity and that the substitution pattern of the aryl rings can influence TRPV6 versus SOCE inhibition. We have also discovered that 2-APB is hydrolyzed and transesterified within minutes in solution.
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Affiliation(s)
- Alexandre Hofer
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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27
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Caes BR, Palte MJ, Raines RT. Organocatalytic Conversion of Cellulose into a Platform Chemical. Chem Sci 2013; 4:196-199. [PMID: 24596655 DOI: 10.1039/c2sc21403b] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The search for a source of fuels and chemicals that is both abundant and renewable has become of paramount importance. The polysaccharide cellulose meets both criteria, and methods have been developed for its transformation into the platform chemical 5-(hydroxymethyl)furfural (HMF). These methods employ harsh reaction conditions or toxic heavy metal catalysts, deterring large-scale implementation. Here, we describe a low-temperature, one-pot route that uses ortho-carboxyl-substituted phenylboronic acids as organocatalysts in conjunction with hydrated magnesium chloride and mineral acids to convert cellulose and cellulose-rich municipal waste to HMF in yields comparable to processes that use toxic heavy metal catalysts. Isotopic labeling studies indicate that the key aldose-to-ketose transformation occurs via an enediol intermediate. The route, which also allows for facile catalyst recovery and recycling, provides a green prototype for cellulose conversion.
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Affiliation(s)
- Benjamin R Caes
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Michael J Palte
- Medical Scientist Training Program and Molecular & Cellular Pharmacology Graduate Training Program, University of Wisconsin-Madison, 1300 University Avenue, Madison, WI 53706, USA
| | - Ronald T Raines
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA ; Department of Biochemistry, University of Wisconsin-Madison, 433 Babcock Drive, Madison, WI 53706, USA
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28
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Dimitrijević E, Taylor MS. 9-Hetero-10-boraanthracene-derived borinic acid catalysts for regioselective activation of polyols. Chem Sci 2013. [DOI: 10.1039/c3sc51172c] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Zimmermann TJ, Bürger M, Tashiro E, Kondoh Y, Martinez NE, Görmer K, Rosin-Steiner S, Shimizu T, Ozaki S, Mikoshiba K, Watanabe N, Hall D, Vetter IR, Osada H, Hedberg C, Waldmann H. Boron-Based Inhibitors of Acyl Protein Thioesterases 1 and 2. Chembiochem 2012; 14:115-22. [DOI: 10.1002/cbic.201200571] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Indexed: 11/08/2022]
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30
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Kovacs G, Montalbetti N, Simonin A, Danko T, Balazs B, Zsembery A, Hediger MA. Inhibition of the human epithelial calcium channel TRPV6 by 2-aminoethoxydiphenyl borate (2-APB). Cell Calcium 2012; 52:468-80. [PMID: 23040501 DOI: 10.1016/j.ceca.2012.08.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 08/25/2012] [Accepted: 08/27/2012] [Indexed: 12/30/2022]
Abstract
TRPV6, a highly calcium-selective member of the transient receptor potential (TRP) channel superfamily, is a major pathway for calcium absorption in the fetal and adult body. It is expressed abundantly in the duodenum, the placenta and exocrine tissues. TRVP6 was postulated to contribute to store-operated calcium channel (SOC) activity in certain cell types such as exocrine cells. In this study, we tested 2-APB, a widely used SOC inhibitor on human TRPV6 (hTRPV6) activity using fluorescence imaging, patch clamp and radioactive tracer techniques in transiently and stably transfected HEK293 cells. We found that the basal calcium and cadmium influx was higher in HEK293 cells transfected with hTRPV6 than in non-transfected cells. 2-APB inhibited hTRPV6 activity in both transient and stably transfected cells. This effect was slightly sensitive toward extracellular calcium. The extracellular sodium concentration did not affect the inhibition of hTRPV6 by 2-APB. However, N-methyl-d-glucamine significantly diminished the inhibitory effect of 2-APB presumably through direct interaction with this compound. Furthermore, 2-APB inhibited the activity of TRPV6 orthologs but not human TRPV5. 2-APB may serve as a parental compound for the development of therapeutic strategies specifically targeting the hTRPV6 calcium channel.
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Affiliation(s)
- Gergely Kovacs
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland.
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31
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Lee D, Williamson CL, Chan L, Taylor MS. Regioselective, Borinic Acid-Catalyzed Monoacylation, Sulfonylation and Alkylation of Diols and Carbohydrates: Expansion of Substrate Scope and Mechanistic Studies. J Am Chem Soc 2012; 134:8260-7. [DOI: 10.1021/ja302549c] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Doris Lee
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON M5S 3H6, Canada
| | - Caitlin L. Williamson
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON M5S 3H6, Canada
| | - Lina Chan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON M5S 3H6, Canada
| | - Mark S. Taylor
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto ON M5S 3H6, Canada
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