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Sevrain CM, Fontaine D, Bauduin A, Guéguinou M, Zhang BL, Chantôme A, Mahéo K, Pasqualin C, Maupoil V, Couthon H, Vandier C, Jaffrès PA. Thio-ether functionalized glycolipid amphiphilic compounds reveal a potent activator of SK3 channel with vasorelaxation effect. Org Biomol Chem 2021; 19:2753-2766. [PMID: 33687423 DOI: 10.1039/d1ob00021g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The modulation of SK3 ion channels can be efficiently and selectively achieved by using the amphiphilic compound Ohmline (a glyco-glycero-ether-lipid). We report herein a series of Ohmline analogues featuring the replacement of one ether function by a thioether function located at the same position or shifted close to its initial position. The variation of the lipid chain length and the preparation of two analogues featuring either one sulfoxide or one sulfone moiety complete this series. Patch clamp measurements indicate that the presence of the thioether function (compounds 7 and 17a) produces strong activators of SK3 channels, whereas the introduction of a sulfoxide or a sulfone function at the same place produces amphiphiles devoid of an effect on SK3 channels. Compounds 7 and 17a are the first amphiphilic compounds featuring strong activation of SK3 channels (close to 200% activation). The cytosolic calcium concentration determined from fluorescence at 3 different times for compound 7b (13 min, 1 h, 24 h) revealed that the effect is different suggesting that the compound could be metabolized over time. This compound could be used as a strong SK3 activator for a short time. The capacity of 7b to activate SK3 was then used to induce vasorelaxation via an endothelium-derived hyperpolarization (EDH) pathway. For the first time, we report that an amphiphilic compound can affect the endothelium dependent vasorelaxation.
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Affiliation(s)
- Charlotte M Sevrain
- Univ. Brest, CNRS, CEMCA UMR 6521, 6 Avenue Victor Le Gorgeu, Brest, F-29238 Brest, France.
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2
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Herrera F, Sevrain CM, Jaffrès PA, Couthon H, Grélard A, Dufourc EJ, Chantôme A, Potier-Cartereau M, Vandier C, Bouchet AM. Singular Interaction between an Antimetastatic Agent and the Lipid Bilayer: The Ohmline Case. ACS Omega 2017; 2:6361-6370. [PMID: 30023517 PMCID: PMC6045331 DOI: 10.1021/acsomega.7b00936] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 09/08/2017] [Indexed: 06/08/2023]
Abstract
SK3 channels are abnormaly expressed in metastatic cells, and Ohmline (OHM), an ether lipid, has been shown to reduce the activity of SK3 channels and the migration capacity of cancer cells. OHM incorporation into the plasma membrane is proposed to dissociate the protein complex formed between SK3 and Orai1, a potassium and a calcium channel, respectively, and would lead to a modification in the lipid environment of both the proteins. Here, we report the synthesis of deuterated OHM that affords the determination, through solid-state NMR, of its entire partitioning into membranes mimicking the SK3 environment. Use of deuterated lipids affords the demonstration of an OHM-induced membrane disordering, which is dose-dependent and increases with increasing amounts of cholesterol (CHOL). Molecular dynamics simulations comfort the disordering action and show that OHM interacts with the carbonyl and phosphate groups of stearoylphosphatidylcholine and sphingomyelin and to a minor extent with CHOL. OHM is thus proposed to remove the CHOL OH moieties away from their main binding sites, forcing a new rearrangement with other lipid groups. Such an interaction takes its origin at the lipid-water interface, but it propagates toward the entire lipid molecules and leads to a cooperative destabilization of the lipid acyl chains, that is, membrane disordering. The consequences of this reorganization of the lipid phases are discussed in the context of the OHM-induced inhibition of SK3 channels.
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Affiliation(s)
- Fernando
E. Herrera
- Physics
Department, Universidad Nacional del Litoral,
Ciudad Universitaria, 3000 Santa Fe, Argentina
| | - Charlotte M. Sevrain
- Université
de Brest, CEMCA, UMR CNRS 6521, IBSAM, 6, Avenue Victor le Gorgeu, 29238 Brest, France
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
| | - Paul-Alain Jaffrès
- Université
de Brest, CEMCA, UMR CNRS 6521, IBSAM, 6, Avenue Victor le Gorgeu, 29238 Brest, France
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
| | - Hélène Couthon
- Université
de Brest, CEMCA, UMR CNRS 6521, IBSAM, 6, Avenue Victor le Gorgeu, 29238 Brest, France
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
| | - Axelle Grélard
- Université
Bordeaux, Institute of Chemistry & Biology of Membranes &
Nanoobjects, UMR5248 CNRS, Allée de Geoffroy St Hilaire Bât B14 Pessac, 33600 Bordeaux, France
| | - Erick J. Dufourc
- Université
Bordeaux, Institute of Chemistry & Biology of Membranes &
Nanoobjects, UMR5248 CNRS, Allée de Geoffroy St Hilaire Bât B14 Pessac, 33600 Bordeaux, France
| | - Aurélie Chantôme
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
- Université
François Rabelais de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, 10 Boulevard Tonnellé Bât. Dutrochet, 2ème étage, 37032 Tours, France
| | - Marie Potier-Cartereau
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
- Université
François Rabelais de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, 10 Boulevard Tonnellé Bât. Dutrochet, 2ème étage, 37032 Tours, France
| | - Christophe Vandier
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
- Université
François Rabelais de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, 10 Boulevard Tonnellé Bât. Dutrochet, 2ème étage, 37032 Tours, France
| | - Ana M. Bouchet
- Network
and Cancer-Canceropole Grand Ouest, (IC-CGO), Maison de la Recherche
en Santé, 63 Quai
Magellan, 44000 Nantes, France
- Université
François Rabelais de Tours, Nutrition, Croissance et Cancer, Inserm UMR1069, 10 Boulevard Tonnellé Bât. Dutrochet, 2ème étage, 37032 Tours, France
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Abstract
The phosphonic acid functional group, which is characterized by a phosphorus atom bonded to three oxygen atoms (two hydroxy groups and one P=O double bond) and one carbon atom, is employed for many applications due to its structural analogy with the phosphate moiety or to its coordination or supramolecular properties. Phosphonic acids were used for their bioactive properties (drug, pro-drug), for bone targeting, for the design of supramolecular or hybrid materials, for the functionalization of surfaces, for analytical purposes, for medical imaging or as phosphoantigen. These applications are covering a large panel of research fields including chemistry, biology and physics thus making the synthesis of phosphonic acids a determinant question for numerous research projects. This review gives, first, an overview of the different fields of application of phosphonic acids that are illustrated with studies mainly selected over the last 20 years. Further, this review reports the different methods that can be used for the synthesis of phosphonic acids from dialkyl or diaryl phosphonate, from dichlorophosphine or dichlorophosphine oxide, from phosphonodiamide, or by oxidation of phosphinic acid. Direct methods that make use of phosphorous acid (H3PO3) and that produce a phosphonic acid functional group simultaneously to the formation of the P-C bond, are also surveyed. Among all these methods, the dealkylation of dialkyl phosphonates under either acidic conditions (HCl) or using the McKenna procedure (a two-step reaction that makes use of bromotrimethylsilane followed by methanolysis) constitute the best methods to prepare phosphonic acids.
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Affiliation(s)
- Charlotte M Sevrain
- CEMCA UMR CNRS 6521, Université de Brest, IBSAM. 6 Avenue Victor Le Gorgeu, 29238 Brest, France
| | - Mathieu Berchel
- CEMCA UMR CNRS 6521, Université de Brest, IBSAM. 6 Avenue Victor Le Gorgeu, 29238 Brest, France
| | - Hélène Couthon
- CEMCA UMR CNRS 6521, Université de Brest, IBSAM. 6 Avenue Victor Le Gorgeu, 29238 Brest, France
| | - Paul-Alain Jaffrès
- CEMCA UMR CNRS 6521, Université de Brest, IBSAM. 6 Avenue Victor Le Gorgeu, 29238 Brest, France
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Tikad A, Fu H, Sevrain CM, Laurent S, Nierengarten JF, Vincent SP. Mechanistic Insight into Heptosyltransferase Inhibition by using Kdo Multivalent Glycoclusters. Chemistry 2016; 22:13147-55. [PMID: 27516128 DOI: 10.1002/chem.201602190] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Indexed: 12/27/2022]
Abstract
The synthesis of unprecedented multimeric Kdo glycoclusters based on fullerene and calix[4]arene central scaffolds is reported. The compounds were used to study the mechanism and scope of multivalent glycosyltransferase inhibition. Multimeric mannosides based on porphyrin and pillar[5]arenes were also generated in a controlled manner. Twelve glycoclusters and their monomeric ligands were thus assayed against heptosyltransferase WaaC, which is an important bacterial glycosyltransferase that is involved in lipopolysaccharide biosynthesis. It was first found that all the multimers interact solely with the acceptor binding site of the enzyme even when the multimeric ligands mimic the heptose donor. Second, the novel Kdo glycofullerenes displayed very potent inhibition (Ki =0.14 μm for the best inhibitor); an inhibition level rarely observed with glycosyltransferases. Although the observed "multivalent effects" (i.e., the enhancement of affinity of a ligand when presented in a multimeric fashion) were in general modest, a dramatic effect of the central scaffold on the inhibition level was evidenced: the fullerene and the porphyrin scaffolds being by far superior to the calix- and pillar-arenes. We could also show, by dynamic light scattering analysis, that the best inhibitor had the propensity to form aggregates with the heptosyltransferase. This aggregative property may contribute to the global multivalent enzyme inhibition, but probably do not constitute the main origin of inhibition.
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Affiliation(s)
- Abdellatif Tikad
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Huixiao Fu
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Charlotte M Sevrain
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Sophie Laurent
- University of Mons (UMONS), Service de Chimie Générale, Organique et Biomédicale, Laboratoire de RMN et d'Imagerie Moléculaire, Avenue Maistriau 19, 7000, Mons, Blegium.,Center for Microscopy and Molecular Imaging (CMMI), Avenue Adrienne Bolland 8, 6041, Gosselies, Belgium
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 rue Becquerel, 67087, Strasbourg Cedex 2, France
| | - Stéphane P Vincent
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium.
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Berthe W, Sevrain CM, Chantôme A, Bouchet AM, Gueguinou M, Fourbon Y, Potier-Cartereau M, Haelters JP, Couthon-Gourvès H, Vandier C, Jaffrès PA. New Disaccharide-Based Ether Lipids as SK3 Ion Channel Inhibitors. ChemMedChem 2016; 11:1531-9. [DOI: 10.1002/cmdc.201600147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/09/2016] [Indexed: 01/20/2023]
Affiliation(s)
- Wilfried Berthe
- Université de Brest; CEMCA, CNRS UMR 6521, IBSAM; 6 Avenue Le Gorgeu 29238 Brest France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Charlotte M. Sevrain
- Université de Brest; CEMCA, CNRS UMR 6521, IBSAM; 6 Avenue Le Gorgeu 29238 Brest France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Aurélie Chantôme
- INSERM, UMR 1069; Université François Rabelais; Tours 37032 France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Ana Maria Bouchet
- INSERM, UMR 1069; Université François Rabelais; Tours 37032 France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Maxime Gueguinou
- INSERM, UMR 1069; Université François Rabelais; Tours 37032 France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Yann Fourbon
- INSERM, UMR 1069; Université François Rabelais; Tours 37032 France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Marie Potier-Cartereau
- INSERM, UMR 1069; Université François Rabelais; Tours 37032 France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Jean-Pierre Haelters
- Université de Brest; CEMCA, CNRS UMR 6521, IBSAM; 6 Avenue Le Gorgeu 29238 Brest France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Hélène Couthon-Gourvès
- Université de Brest; CEMCA, CNRS UMR 6521, IBSAM; 6 Avenue Le Gorgeu 29238 Brest France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Christophe Vandier
- INSERM, UMR 1069; Université François Rabelais; Tours 37032 France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
| | - Paul-Alain Jaffrès
- Université de Brest; CEMCA, CNRS UMR 6521, IBSAM; 6 Avenue Le Gorgeu 29238 Brest France
- Network “Ion Channels and Cancer - Canceropole Grand Ouest”, (IC-CGO); France
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van Straaten KE, Kuttiyatveetil JRA, Sevrain CM, Villaume SA, Jiménez-Barbero J, Linclau B, Vincent SP, Sanders DAR. Structural basis of ligand binding to UDP-galactopyranose mutase from Mycobacterium tuberculosis using substrate and tetrafluorinated substrate analogues. J Am Chem Soc 2015; 137:1230-44. [PMID: 25562380 DOI: 10.1021/ja511204p] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
UDP-Galactopyranose mutase (UGM) is a flavin-containing enzyme that catalyzes the reversible conversion of UDP-galactopyranose (UDP-Galp) to UDP-galactofuranose (UDP-Galf) and plays a key role in the biosynthesis of the mycobacterial cell wall galactofuran. A soluble, active form of UGM from Mycobacterium tuberculosis (MtUGM) was obtained from a dual His6-MBP-tagged MtUGM construct. We present the first complex structures of MtUGM with bound substrate UDP-Galp (both oxidized flavin and reduced flavin). In addition, we have determined the complex structures of MtUGM with inhibitors (UDP and the dideoxy-tetrafluorinated analogues of both UDP-Galp (UDP-F4-Galp) and UDP-Galf (UDP-F4-Galf)), which represent the first complex structures of UGM with an analogue in the furanose form, as well as the first structures of dideoxy-tetrafluorinated sugar analogues bound to a protein. These structures provide detailed insight into ligand recognition by MtUGM and show an overall binding mode similar to those reported for other prokaryotic UGMs. The binding of the ligand induces conformational changes in the enzyme, allowing ligand binding and active-site closure. In addition, the complex structure of MtUGM with UDP-F4-Galf reveals the first detailed insight into how the furanose moiety binds to UGM. In particular, this study confirmed that the furanoside adopts a high-energy conformation ((4)E) within the catalytic pocket. Moreover, these investigations provide structural insights into the enhanced binding of the dideoxy-tetrafluorinated sugars compared to unmodified analogues. These results will help in the design of carbohydrate mimetics and drug development, and show the enormous possibilities for the use of polyfluorination in the design of carbohydrate mimetics.
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Affiliation(s)
- Karin E van Straaten
- Department of Chemistry, University of Saskatchewan , 110 Science Place, Saskatoon S7N 5C9, Canada
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El Bkassiny S, N'Go I, Sevrain CM, Tikad A, Vincent SP. Synthesis of a novel UDP-carbasugar as UDP-galactopyranose mutase inhibitor. Org Lett 2014; 16:2462-5. [PMID: 24746099 DOI: 10.1021/ol500848q] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The multistep synthesis of a novel UDP-C-cyclohexene, designed as a high energy intermediate analogue of the UDP-galactopyranose mutase (UGM) catalyzed isomerization reaction, is reported. The synthesis of the central carbasugar involved the preparation of a galactitol derivative bearing two olefins necessary for the construction of the cyclohexene ring by a ring-closing metathesis as a key step. Further successive phosphonylation, deprotection, and UMP coupling provided the target molecule. The final molecule was assayed against UGM and compared with UDP-C-Galf, the C-glycosidic UGM substrate analogue.
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Affiliation(s)
- Sandy El Bkassiny
- University of Namur , Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
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Sevrain CM, Haelters JP, Chantôme A, Couthon-Gourvès H, Gueguinou M, Potier-Cartereau M, Vandier C, Jaffrès PA. DiGalactosyl-Glycero-Ether Lipid: synthetic approaches and evaluation as SK3 channel inhibitor. Org Biomol Chem 2013; 11:4479-87. [DOI: 10.1039/c3ob40634b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fraix A, Montier T, Le Gall T, Sevrain CM, Carmoy N, Lindberg MF, Lehn P, Jaffrès PA. Lipothiophosphoramidates for gene delivery: critical role of the cationic polar headgroup. Org Biomol Chem 2012; 10:2051-8. [DOI: 10.1039/c2ob06812e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Sevrain CM, Haelters JP, Chantôme A, Couthon-Gourvès H, Girault A, Vandier C, Jaffrès PA. Glyco-Phospho-Glycero Ether Lipids (GPGEL): synthesis and evaluation as small conductance Ca2+-activated K+ channel (SK3) inhibitors. Med Chem Commun 2012. [DOI: 10.1039/c2md20207g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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