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Mourer M, Regnouf-de-Vains JB, Duval RE. Functionalized Calixarenes as Promising Antibacterial Drugs to Face Antimicrobial Resistance. Molecules 2023; 28:6954. [PMID: 37836797 PMCID: PMC10574364 DOI: 10.3390/molecules28196954] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/25/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
Since the discovery of polyphenolic resins 150 years ago, the study of polymeric compounds named calix[n]arene has continued to progress, and those skilled in the art perfectly know now how to modulate this phenolic ring. Consequently, calix[n]arenes are now used in a large range of applications and notably in therapeutic fields. In particular, the calix[4]arene exhibits multiple possibilities for regioselective polyfunctionalization on both of its rims and offers researchers the possibility of precisely tuning the geometry of their structures. Thus, in the crucial research of new antibacterial active ingredients, the design of calixarenes finds its place perfectly. This review provides an overview of the work carried out in this aim towards the development of intrinsically active prodrogues or metallic calixarene complexes. Out of all the work of the community, there are some excellent activities emerging that could potentially place these original structures in a very good position for the development of new active ingredients.
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Affiliation(s)
- Maxime Mourer
- Université de Lorraine, CNRS, L2CM, F-54000 Nancy, France
| | | | - Raphaël E Duval
- Université de Lorraine, CNRS, L2CM, F-54000 Nancy, France
- ABC Platform®, F-54505 Vandœuvre-lès-Nancy, France
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2
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Millard M, Bernhard Y, Canilho N, Grandemange S, Parant S, Mourer M, Lassalle HP, Pasc A. Enhanced stability and photothermal efficiency of Indocyanine Green J-aggregates by nanoformulation with Calix[4]arene for photothermal therapy of cancers. Colloids Surf B Biointerfaces 2023; 230:113516. [PMID: 37660516 DOI: 10.1016/j.colsurfb.2023.113516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 07/17/2023] [Accepted: 08/13/2023] [Indexed: 09/05/2023]
Abstract
Photothermal therapy (PTT) is a method of growing attention, owing to its controllable process, high efficiency and minimal side effect. Indocyanine Green (ICG) is as Food and Drug Administration (FDA) approved agent that stands on the frontline of further developments of PTT toward clinics. However, the applicability of ICG-mediated PTT is limited by the rapid in vivo clearance and photo-degradation of ICG. To improve those parameters, nanosized ICG-loaded nanoparticles (ICG-J/CX) were fabricated in this study by co-assembly of anionic ICG J-aggregates (ICG-J) with cationic tetraguanidinium calix[4]arene (CX). This very simple approach produces ICG-J/CX with a well-defined nanometer range size and a close to neutral charge. The nanoparticles demonstrate high photothermal conversion efficiency (PCE) and dramatically improved photostability, as compared with ICG. The in vitro cellular uptake and cytotoxicity studies further demonstrated that the ICG-J/CX nanoparticles enhance uptake and photothermal efficiency in comparison with ICG or non-formulated ICG-J, overall demonstrating that ICG-J/CX mediated photothermal therapy have significant potential for attaining cancer treatment.
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Affiliation(s)
- Marie Millard
- Université de Lorraine, CNRS, L2CM UMR 7053, F-54506 Vandoeuvre-lès-Nancy, France; Université de Lorraine, CNRS UMR 7039, CRAN, F-54000 Nancy, France
| | - Yann Bernhard
- Université de Lorraine, CNRS, L2CM UMR 7053, F-54506 Vandoeuvre-lès-Nancy, France
| | - Nadia Canilho
- Université de Lorraine, CNRS, L2CM UMR 7053, F-54506 Vandoeuvre-lès-Nancy, France
| | | | - Stéphane Parant
- Université de Lorraine, CNRS, L2CM UMR 7053, F-54506 Vandoeuvre-lès-Nancy, France
| | - Maxime Mourer
- Université de Lorraine, CNRS, L2CM UMR 7053, F-54506 Vandoeuvre-lès-Nancy, France
| | - Henri-Pierre Lassalle
- Université de Lorraine, CNRS UMR 7039, CRAN, F-54000 Nancy, France; Institut de Cancérologie de Lorraine, Unité de Recherche Translationnelle F-54000 Nancy, France.
| | - Andreea Pasc
- Université de Lorraine, CNRS, L2CM UMR 7053, F-54506 Vandoeuvre-lès-Nancy, France.
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Delova A, Losantos R, Pecourneau J, Mourer M, Pasc A, Monari A. Modelling the effects of E/ Z photoisomerization of a cyclocurcumin analogue on the properties of cellular lipid membranes. Phys Chem Chem Phys 2023. [PMID: 37475582 DOI: 10.1039/d3cp02955g] [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: 07/22/2023]
Abstract
The use of photosensitive molecules capable of isomerizing under light stimuli, and thus induce perturbation in biological systems, is becoming increasingly popular for potential light-activated chemotherapeutic purposes. We recently show that a cyclocurcumin derivative (CCBu), may be suitable for light-activated chemotherapy and may constitute a valuable alternative to traditional photodynamic therapy, due to its oxygen-independent mechanism of action, which allows the treatment of hypoxic solid tumors. In particular, we have shown that the E/Z photoisomerization of CCBu correlates with strong perturbations of model lipid bilayers. In this work, we perform all-atom classical molecular dynamics for a more complex bilayer, whose composition is, thus, much closer to eukaryotic outer cell membranes. We have evidenced important differences in the interaction pathway between CCBu and the complex lipid bilayer as compared to previous models, concerning both the membrane penetration capacity and the isomerization-induced perturbations. While we confirm that structural perturbations of the lipid membrane are induced by isomerization, we also show how the use of a simplified membrane model can result in an oversimplification of the system and hinder key physical and biological phenomena. Although, CCBu may be considered as a suitable candidate for light-activated chemotherapy, we also underline how the inclusion of bulkier substituents, inducing larger perturbations upon photoisomerization, may enhance its efficiency.
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Affiliation(s)
| | - Raul Losantos
- Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France.
- Universidad de La Rioja, Departamento de Química, Centro de Investigación en Síntesis Química, 26006 Logroño, Spain
| | | | - Maxime Mourer
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Andreea Pasc
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Antonio Monari
- Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France.
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4
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Delova A, Losantos R, Pecourneau J, Bernhard Y, Mourer M, Pasc A, Monari A. Perturbation of Lipid Bilayers by Biomimetic Photoswitches Based on Cyclocurcumin. J Chem Inf Model 2023; 63:299-307. [PMID: 36479861 DOI: 10.1021/acs.jcim.2c01152] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The use of photoswitches which may be activated by suitable electromagnetic radiation is an attractive alternative to conventional photodynamic therapy. Here, we report all-atom molecular dynamics simulation of a biomimetic photoswitch derived from cyclocurcumin and experiencing E/Z photoisomerization. In particular, we show that the two isomers interact persistently with a lipid bilayer modeling a cellular membrane. Furthermore, the interaction with the membrane is strongly dependent on the concentration, and a transition between ordered and disordered arrangements of the photoswitches is observed. We also confirm that the structural parameters of the bilayer are differently affected by the two isomers and hence can be modulated through photoswitching, offering interesting perspectives for future applications.
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Affiliation(s)
| | - Raúl Losantos
- Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France.,Departamento de Química, Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | | | - Yann Bernhard
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Maxime Mourer
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Andreea Pasc
- Université de Lorraine CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Antonio Monari
- Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France
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5
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Pecourneau J, Losantos R, Gansmuller A, Parant S, Bernhard Y, Mourer M, Monari A, Pasc A. Tuning the competition between photoisomerization and photothermy in biomimetic cyclocurcumin analogues. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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6
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Pecourneau J, Losantos R, Delova A, Bernhard Y, Parant S, Mourer M, Monari A, Pasc A. Biomimetic Photo-Switches Softening Model Lipid Membranes. Langmuir 2022; 38:15642-15655. [PMID: 36469419 DOI: 10.1021/acs.langmuir.2c02425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We report the synthesis and characterization of a novel photo-switch based on biomimetic cyclocurcumin analogous and interacting with the lipid bilayer, which can be used in the framework of oxygen-independent light-induced therapy. More specifically, by using molecular dynamics simulations and free energy techniques, we show that the inclusion of hydrophobic substituents is needed to allow insertion in the lipid membrane. After having confirmed experimentally that the substituents do not preclude the efficient photoisomerization, we show through UV-vis and dynamic light scattering measurements together with compression isotherms that the chromophore is internalized in both lipid vesicles and monomolecular film, respectively, inducing their fluidification. The irradiation of the chromophore-loaded lipid aggregates modifies their properties due to the different organization of the two diastereoisomers, E and Z. In particular, a competition between a fast structural reorganization and a slower expulsion of the chromophore after isomerization can be observed in the kinetic profiles recorded during E to Z photoisomerization. This report paves the way for future investigations in the optimization of biomimetic photoswitches potentially useful in modern light-induced therapeutic strategies.
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Affiliation(s)
| | - Raúl Losantos
- Université de Lorraine and CNRS, L2CM UMR 7053, F-5400Nancy, France
- Université de Lorraine, CNRS, LPCT UMR 7019, F-54000Nancy, France
- Université Paris Cité and CNRS, ITODYS, F-75006Paris, France
- Department of Chemistry, CISQ, Universidad de La Rioja, 26006Logroño, Spain
| | | | - Yann Bernhard
- Université de Lorraine and CNRS, L2CM UMR 7053, F-5400Nancy, France
| | - Stéphane Parant
- Université de Lorraine and CNRS, L2CM UMR 7053, F-5400Nancy, France
| | - Maxime Mourer
- Université de Lorraine and CNRS, L2CM UMR 7053, F-5400Nancy, France
| | - Antonio Monari
- Université de Lorraine, CNRS, LPCT UMR 7019, F-54000Nancy, France
- Université Paris Cité and CNRS, ITODYS, F-75006Paris, France
| | - Andreea Pasc
- Université de Lorraine and CNRS, L2CM UMR 7053, F-5400Nancy, France
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7
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Korchowiec B, Orlof-Naturalna M, Korchowiec J, de Vains JBR, Mourer M, Rogalska E. The hydrophobic core effect in model bacterial membranes upon interaction with tetra-p-guanidinoethylcalix[4]arene. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Pecourneau J, Losantos R, Monari A, Parant S, Pasc A, Mourer M. Synthesis and Photoswitching Properties of Bioinspired Dissymmetric γ-Pyrone, an Analogue of Cyclocurcumin. J Org Chem 2021; 86:8112-8126. [PMID: 34101450 DOI: 10.1021/acs.joc.1c00598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cyclocurcumin (CC), a turmeric curcuminoid with potential therapeutic properties, is also a natural photoswitch that may undergo E/Z photoisomerization under UV light. To be further exploited in relevant biological applications, photoactivation under near-infrared (NIR) irradiation is required. Such requirement can be met through opportune chemical modifications, by favoring two-photon absorption (TPA) probability. Herein, a general and efficient synthesis of a biomimetic 2,6-disubstituted-γ-pyrone analogue of CC is described, motivated by the fact that molecular modeling previews an order of magnitude increase of its NIR TPA compared to CC. Three retrosynthetic pathways have been identified (i) via an aryl-oxazole intermediate or via aryl-diynone through (ii) a bottom-up or (iii) a top-down approach. While avoiding the passage through unstable synthons or low-yield intermediate reactions, only the latest approach could conveniently afford the 2,6-disubstituted-γ-pyrone analogue of CC, in ten steps and with an overall yield of 18%. The photophysical properties of our biomimetic analogue have also been characterized showing an improved photoisomerization yield over the parent natural compound. The potentially improved nonlinear optical properties, as well as enhanced stability, may be correlated to the enforcement of the planarity of the pyrone moiety leading to a quadrupolar D-π-A-π-D system.
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Affiliation(s)
- Jérémy Pecourneau
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Raúl Losantos
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France.,Université de Lorraine, CNRS, LPCT UMR 7019, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Antonio Monari
- Université de Lorraine, CNRS, LPCT UMR 7019, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Stéphane Parant
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Andreea Pasc
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
| | - Maxime Mourer
- Université de Lorraine, CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandœuvre-lès-Nancy, France
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9
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Losantos R, Pecourneau J, Mourer M, Parant S, Pasc A, Monari A. trans-cis Photoisomerization of a biomimetic cyclocurcumin analogue rationalized by molecular modelling. Phys Chem Chem Phys 2021; 23:12842-12849. [PMID: 34060574 DOI: 10.1039/d1cp01224j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cyclocurcumin is a natural compound extracted from turmeric and showing, in addition to antiinfective, antibacterial, and intinflammatory capabilities, solvent-dependent phtoswitching ability. The solvent-dependent photochemistry of cyclocurcumin has been rationalized on the basis of a competition between π-π* and n-π* states. Recently we have reported the synthesis of a biomimetic analogue showing enhanced photochemical properties and in particular presenting photoswitching capacity in various media. In the present contribution we rely on the use of molecular modeling and simulation, incuding density functional and wavefunction based methods to explore the excited states potential energy surface landscape. We see that the addition of a carbon-carbon double bond to the core of the natural compounds favors the population of the π-π* state, whatever the choice of the solvent, and hence leads to photoisomerisation, with fluorescence reduced to only a minor channel, rationalizing the experimental observations. In addition, the two photon absorption cross section is also strongly increased compared to the parent compound, paving the way to the use in biologically oriented applications.
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Affiliation(s)
- Raúl Losantos
- Université de Lorraine and CNRS, LPCT UMR 7019, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France. and Université de Lorraine and CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France
| | - Jérémy Pecourneau
- Université de Lorraine and CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France
| | - Maxime Mourer
- Université de Lorraine and CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France
| | - Stéphane Parant
- Université de Lorraine and CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France
| | - Andreea Pasc
- Université de Lorraine and CNRS, L2CM UMR 7053, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France
| | - Antonio Monari
- Université de Lorraine and CNRS, LPCT UMR 7019, Bvd des Aiguillettes, F-54506 Vandoeuvre-lès-Nancy, France.
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Lara A, Létoffé A, Hoppe S, Mourer M, G'sell C, Regnouf‐de‐Vains J, Ponçot M. Use of a bis(aminoalkyl)‐calix[4]arene derivative as cross‐linking agent to enhance functional and mechanical properties of a maleated polypropylene. J Appl Polym Sci 2021. [DOI: 10.1002/app.49889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alejandra Lara
- Université de Lorraine, CNRS, IJL Nancy France
- Université de Lorraine, CNRS, L2CM Nancy France
- Université de Lorraine, CNRS, LabEx “DAMAS” Metz France
| | - Adrien Létoffé
- Université de Lorraine, CNRS, IJL Nancy France
- Université de Lorraine, CNRS, LabEx “DAMAS” Metz France
| | | | | | - Christian G'sell
- Université de Lorraine, CNRS, IJL Nancy France
- Université de Lorraine, CNRS, LabEx “DAMAS” Metz France
| | | | - Marc Ponçot
- Université de Lorraine, CNRS, IJL Nancy France
- Université de Lorraine, CNRS, LabEx “DAMAS” Metz France
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11
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Ben Salem A, Ben Salah B, Mhalla D, Trigui M, Mourer M, Regnouf-de-Vains JB, Kossentini M. Synthesis, crystal structure and biological studies of novel amidrazones, triazoles, Thiatriazole and Triazine compounds. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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Marazzi M, Francés-Monerris A, Mourer M, Pasc A, Monari A. Trans-to-cis photoisomerization of cyclocurcumin in different environments rationalized by computational photochemistry. Phys Chem Chem Phys 2020; 22:4749-4757. [PMID: 32057038 DOI: 10.1039/c9cp06565b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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
Cyclocurcumin is a turmeric component that has attracted much less attention compared to the well-known curcumin. In spite of the less deep characterization of its properties, cyclocurcumin has shown promising anticancer effects when used in combination with curcumin. Especially, due to its peculiar molecular structure, cyclocurcumin can be regarded as an almost ideal photoswitch, whose capabilities can also be exploited for relevant biological applications. Here, by means of state-of-the-art computational methods for electronic excited-state calculations (TD-DFT, MS-CASPT2, and XMS-CASPT2), we analyze in detail the absorption and photoisomerization pathways leading from the more stable trans isomer to the cis one. The different molecular surroundings, taken into account by means of the electrostatic solvent effect and compared with available experimental data, have been found to be critical in describing the fate of irradiated cyclocurcumin: when in non-polar environments, an excited state barrier prevents photoisomerization and favours fluorescence, whereas in polar solvents, an almost barrierless path results in a striking decrease of fluorescence, opening the way toward a crossing region with the ground state and thus funneling the photoproduction of the cis isomer.
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Affiliation(s)
- Marco Marazzi
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33, 600, E-28805, Alcalá de Henares, Madrid, Spain. and Chemical Research Institute "Andrés M. del Rio" (IQAR), Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33, 600, E-28805, Alcalá de Henares, Madrid, Spain
| | - Antonio Francés-Monerris
- Université de Lorraine and CNRS, LPCT UMR-7019, F-5400 Nancy, France. and Departement de Quimica Fisica, Universitat de Valencia, 46100 Burjassot, Spain
| | - Maxime Mourer
- Université de Lorraine and CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Andreea Pasc
- Université de Lorraine and CNRS, L2CM UMR 7053, F-54000 Nancy, France
| | - Antonio Monari
- Université de Lorraine and CNRS, LPCT UMR-7019, F-5400 Nancy, France.
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Mourer M, Duval RE, Constant P, Daffé M, Regnouf‐de‐Vains J. Impact of Tetracationic Calix[4]arene Conformation—from Conic Structure to Expanded Bolaform—on Their Antibacterial and Antimycobacterial Activities. Chembiochem 2019; 20:911-921. [DOI: 10.1002/cbic.201800609] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Maxime Mourer
- Université de LorraineCNRS, L2CMFaculté des Sciences et Technologies Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy France
| | - Raphaël E. Duval
- Université de LorraineCNRS, L2CMFaculté des Sciences et Technologies Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy France
- ABC Platform Nancy 54001 France
| | - Patricia Constant
- Département Tuberculose & Biologie des InfectionsInstitut de Pharmacologie et de Biologie Structurale, UMR 5089Université de ToulouseCNRS, UPS 205 Route de Narbonne 31077 Toulouse Cedex 04 France
| | - Mamadou Daffé
- Département Tuberculose & Biologie des InfectionsInstitut de Pharmacologie et de Biologie Structurale, UMR 5089Université de ToulouseCNRS, UPS 205 Route de Narbonne 31077 Toulouse Cedex 04 France
| | - Jean‐Bernard Regnouf‐de‐Vains
- Université de LorraineCNRS, L2CMFaculté des Sciences et Technologies Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy France
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14
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Korchowiec B, Gorczyca M, Rogalska E, Regnouf-de-Vains JB, Mourer M, Korchowiec J. The selective interactions of cationic tetra-p-guanidinoethylcalix[4]arene with lipid membranes: theoretical and experimental model studies. Soft Matter 2016; 12:181-190. [PMID: 26451711 DOI: 10.1039/c5sm01891a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Behavior of cationic tetra-p-guanidinoethylcalix[4]arene (CX1) and its building block, p-guanidinoethylphenol (mCX1) in model monolayer lipid membranes was investigated using all atom molecular dynamics simulations and surface pressure measurements. Members of two classes of lipids were taken into account: zwitterionic 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and anionic 1,2-dimyristoyl-sn-glycero-3-phospho-l-serine sodium salt (DMPS) as models of eukaryotic and bacterial cell membranes, respectively. It was demonstrated that CX1 and mCX1 accumulate near the negatively charged DMPS monolayers. The adsorption to neutral monolayers was negligible. In contrast to mCX1, CX1 penetrated into the hydrophobic part of the monolayer. The latter effect, which is possible due to a flip-flop inversion of the CX1 orientation in the lipid layer compared to the aqueous phase, may be responsible for its antibacterial activity.
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Affiliation(s)
- Beata Korchowiec
- Department of Physical Chemistry and Electrochemistry, Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland.
| | - Marcelina Gorczyca
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland.
| | - Ewa Rogalska
- Structure et Réactivité des Systèmes Moléculaires Complexes, BP 239, CNRS/Université de Lorraine, 54506 Vandoeuvre-lès-Nancy cedex, France
| | - Jean-Bernard Regnouf-de-Vains
- Structure et Réactivité des Systèmes Moléculaires Complexes, BP 239, CNRS/Université de Lorraine, 54506 Vandoeuvre-lès-Nancy cedex, France
| | - Maxime Mourer
- Structure et Réactivité des Systèmes Moléculaires Complexes, BP 239, CNRS/Université de Lorraine, 54506 Vandoeuvre-lès-Nancy cedex, France
| | - Jacek Korchowiec
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland.
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Lemée F, Mourer M, Aranda L, Clarot I, Regnouf-de-Vains JB. Bacteriophilic tetra-p-guanidinoethyl-calix[4]arene derived polymers. Syntheses and E. coli sequestration studies. NEW J CHEM 2016. [DOI: 10.1039/c6nj01563h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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
New resins functionalized by the antibacterial tetra-p-guanidinoethylcalix[4]arene were synthesized, and their bacteriophilic properties were evaluated (E. coli) by capillary electrophoresis.
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Affiliation(s)
- Frédéric Lemée
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
| | - Maxime Mourer
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
| | - Lionel Aranda
- Université de Lorraine
- Institut Jean Lamour – UMR 7198
- Vandœuvre-lès-Nancy
- France
- CNRS
| | - Igor Clarot
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
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Massimba-Dibama H, Mourer M, Constant P, Daffé M, Regnouf-de-Vains JB. Guanidinium compounds with sub-micromolar activities against Mycobacterium tuberculosis . Synthesis, characterization and biological evaluations. Bioorg Med Chem 2015; 23:5410-8. [DOI: 10.1016/j.bmc.2015.07.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/17/2015] [Accepted: 07/25/2015] [Indexed: 10/23/2022]
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Abstract
The polycationic pyridinium-Merrifield resinIwas prepared and subjected to bacteria sequestration studies. Its efficiency was demonstrated by capillary electrophoresis titrations, and the effectiveness of the sequestration was shown by confocal microscopy.
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Affiliation(s)
- Frédéric Lemée
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
| | - Igor Clarot
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
| | - Loïc Ronin
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
| | - Lionel Aranda
- Université de Lorraine
- Institut Jean Lamour - UMR 7198
- Vandœuvre-lès-Nancy
- France
- CNRS
| | - Maxime Mourer
- Université de Lorraine
- SRSMC
- UMR 7565
- Vandœuvre-lès-Nancy
- France
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Massimba Dibama H, Mourer M, Duval RE, Regnouf-de-Vains JB. Poly-guanidinoethylphenylethers organised around a benzene ring: Synthesis and evaluation of their antibacterial and cytotoxic properties. Bioorg Med Chem Lett 2014; 24:4791-3. [DOI: 10.1016/j.bmcl.2014.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/02/2014] [Accepted: 09/03/2014] [Indexed: 02/09/2023]
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Hamzaoui S, Hamden K, Ben Salem A, Mourer M, Regnouf-De-Vains JB, Kossentini M. Synthesis and Evaluation of 1,ω-Bis(1,2,3,5-thiatriazol-5-yl)alkanes asIn VitroandIn Vivoα-Amylase and Lipase Inhibitors. Arch Pharm (Weinheim) 2013; 346:321-9. [DOI: 10.1002/ardp.201200312] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 12/24/2012] [Accepted: 01/18/2013] [Indexed: 11/07/2022]
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Derbel N, Clarot I, Mourer M, Regnouf-de-Vains JB, Ruiz-López MF. Intramolecular interactions versus hydration effects on p-guanidinoethyl-phenol structure and pKa values. J Phys Chem A 2012; 116:9404-11. [PMID: 22931189 DOI: 10.1021/jp3069893] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We analyze the structure, hydration, and pK(a) values of p-guanidinoethyl-phenol through a combined experimental and theoretical study. These issues are relevant to understand the mechanism of action of the tetrameric form, the antibacterial compound tetra-p-guanidinoethyl-calix[4]arene (Cx1). The investigated system can also be useful to model other pharmaceutical drugs bearing a guanidine function in the vicinity of an ionizable group and the effect of arginine on the pK(a) of vicinal ionizable residues (in particular tyrosine) in peptides. The p-guanidinoethyl-phenol monomer (mCx1) has two ionizable groups. One important particularity of this system is that it exhibits high molecular flexibility that potentially leads to enhanced stabilization in folded structures by direct, strong Coulombic interactions between the ionizable groups. The first pK(a) corresponding to ionization of the -OH group has experimentally been shown to be only slightly different from usual values in substituted phenols. However, because of short-range Coulombic interactions, the role of intramolecular interactions and solvation effects on the acidities of this compound is expected to be important and it has been analyzed here on the basis of theoretical calculations. We use a discrete-continuum solvation model together with quantum-mechanical calculations at the B3LYP level of theory and the extended 6-311+G(2df,2p) basis set. Both intra- and intermolecular effects are very large (~70 kcal/mol) but exhibit an almost perfect compensation, thus explaining that the actual pK(a) of mCx1 is close to free phenol. The same compensation of environmental effects applies to the second pK(a) that concerns the guanidinium group. Such a pK(a) could not be determined experimentally with standard titration techniques and in fact the theoretical study predicts a value of 14.2, that is, one unit above the pK(a) of the parent ethyl-guanidinium molecule.
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Affiliation(s)
- Najoua Derbel
- LSAMA, University of Tunis - El Manar, Campus Universitaire, 2092, Tunis, Tunisia.
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Mourer M, Fontanay S, Duval RE, Regnouf-de-Vains JB. Synthesis, Characterization, and Biological Evaluation as Antibacterial Agents of Water-Soluble Calix[4]arenes and Phenol Derivatives Incorporating Carboxylate Groups. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Formosa C, Grare M, Jauvert E, Coutable A, Regnouf-de-Vains JB, Mourer M, Duval RE, Dague E. Nanoscale analysis of the effects of antibiotics and CX1 on a Pseudomonas aeruginosa multidrug-resistant strain. Sci Rep 2012; 2:575. [PMID: 22893853 PMCID: PMC3418629 DOI: 10.1038/srep00575] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 07/30/2012] [Indexed: 12/02/2022] Open
Abstract
Drug resistance is a challenge that can be addressed using nanotechnology. We focused on the resistance of the bacteria Pseudomonas aeruginosa and investigated, using Atomic Force Microscopy (AFM), the behavior of a reference strain and of a multidrug resistant clinical strain, submitted to two antibiotics and to an innovative antibacterial drug (CX1). We measured the morphology, surface roughness and elasticity of the bacteria under physiological conditions and exposed to the antibacterial molecules. To go further in the molecules action mechanism, we explored the bacterial cell wall nanoscale organization using functionalized AFM tips. We have demonstrated that affected cells have a molecularly disorganized cell wall; surprisingly long molecules being pulled off from the cell wall by a lectin probe. Finally, we have elucidated the mechanism of action of CX1: it destroys the outer membrane of the bacteria as demonstrated by the results on artificial phospholipidic membranes and on the resistant strain.
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Affiliation(s)
- C Formosa
- Centre National de la Recherche Scientifique, Laboratoire d’Analyse et d’Architecture des Systèmes-LAAS, Toulouse, France
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Mourer M, Massimba Dibama H, Constant P, Daffé M, Regnouf-de-Vains JB. Anti-mycobacterial activities of some cationic and anionic calix[4]arene derivatives. Bioorg Med Chem 2012; 20:2035-41. [DOI: 10.1016/j.bmc.2012.01.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 01/24/2012] [Accepted: 01/25/2012] [Indexed: 11/29/2022]
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Geller C, Fontanay S, Mourer M, Dibama HM, Regnouf-de-Vains JB, Finance C, Duval R. Antiseptic properties of two calix[4]arenes derivatives on the human coronavirus 229E. Antiviral Res 2010; 88:343-6. [PMID: 20854844 PMCID: PMC7114180 DOI: 10.1016/j.antiviral.2010.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 09/01/2010] [Accepted: 09/14/2010] [Indexed: 11/30/2022]
Abstract
Facing the lack in specific antiviral treatment, it is necessary to develop new means of prevention. In the case of the Coronaviridae this family is now recognized as including potent human pathogens causing upper and lower respiratory tract infections as well as nosocomial ones. Within the purpose of developing new antiseptics molecules, the antiseptic virucidal activity of two calix[4]arene derivatives, the tetra-para-sulfonato-calix[4]arene (C[4]S) and the 1,3-bis(bithiazolyl)-tetra-para-sulfonato-calix[4]arene (C[4]S-BTZ) were evaluated toward the human coronavirus 229E (HCoV 229E). Comparing these results with some obtained previously with chlorhexidine and hexamidine, (i) these two calixarenes did not show any cytotoxicity contrary to chlorhexidine and hexamidine, (ii) C[4]S showed as did hexamidine, a very weak activity against HCoV 229E, and (iii) the C[4]S-BTZ showed a stronger activity than chlorhexidine, i.e. 2.7 and 1.4log₁₀ reduction in viral titer after 5min of contact with 10⁻³mol L⁻¹ solutions of C[4]S-BTZ and chlorhexidine, respectively. Thus, the C[4]S-BTZ appeared as a promising virucidal (antiseptic) molecule.
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Affiliation(s)
| | | | | | | | | | | | - R.E. Duval
- Corresponding author at: Groupe d’Etude des Vecteurs Supramoléculaires du Médicament (GEVSM), Structure et Réactivité des Systèmes Moléculaires Complexes (SRSMC), Nancy-University, CNRS, Faculty of Pharmacy, 5 rue Albert Lebrun, BP 80403, 54001 Nancy Cedex, France. Tel.: +33 (0) 3 83 68 23 36; fax: +33 (0) 3 83 68 23 57.
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Grare M, Dibama HM, Lafosse S, Ribon A, Mourer M, Regnouf-de-Vains JB, Finance C, Duval R. Cationic compounds with activity against multidrug-resistant bacteria: interest of a new compound compared with two older antiseptics, hexamidine and chlorhexidine. Clin Microbiol Infect 2010; 16:432-8. [DOI: 10.1111/j.1469-0691.2009.02837.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Grare M, Fontanay S, Massimba Dibama H, Mourer M, Regnouf-de-Vains JB, Finance C, Duval R. Cinétique d’action du para-guanidinoéthylcalix[4]arène, et évolution de la perméabilité membranaire. ACTA ACUST UNITED AC 2010; 58:46-51. [DOI: 10.1016/j.patbio.2009.07.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2009] [Accepted: 07/12/2009] [Indexed: 10/20/2022]
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Mourer M, Psychogios N, Laumond G, Aubertin AM, Regnouf-de-Vains JB. Synthesis and anti-HIV evaluation of water-soluble calixarene-based bithiazolyl podands. Bioorg Med Chem 2010; 18:36-45. [DOI: 10.1016/j.bmc.2009.11.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 11/02/2009] [Accepted: 11/07/2009] [Indexed: 10/20/2022]
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Dibama HM, Clarot I, Fontanay S, Salem AB, Mourer M, Finance C, Duval RE, Regnouf-de-Vains JB. Towards calixarene-based prodrugs: Drug release and antibacterial behaviour of a water-soluble nalidixic acid/calix[4]arene ester adduct. Bioorg Med Chem Lett 2009; 19:2679-82. [DOI: 10.1016/j.bmcl.2009.03.139] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 03/25/2009] [Accepted: 03/27/2009] [Indexed: 11/29/2022]
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Mourer M, Hapiot F, Tilloy S, Monflier E, Menuel S. Easily Accessible Mono- and Polytopic β-Cyclodextrin Hosts by Click Chemistry. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800728] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Grare M, Dague E, Mourer M, Regnouf-de-Vains JB, Finance C, Duval JFL, Duval RE, Gaboriaud F. Microélectrophorèse et microscopie à force atomique: deux nouveaux outils d'évaluation de l'effet pariétal d'antibactériens. ACTA ACUST UNITED AC 2007; 55:465-71. [PMID: 17913392 DOI: 10.1016/j.patbio.2007.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2007] [Accepted: 08/16/2007] [Indexed: 11/26/2022]
Abstract
Microbial cell surface properties play a central role in controlling phenomena such as bacterial adhesion and biofilm formation (on stent or on prosthesis for example). The quantification of these properties and the understanding of interactions with antibacterial compounds remain difficult, in view of the complex and dynamic nature of the cell wall constituents. Various approaches, macroscopic, microscopic or molecular, have been developed. Two of them interest us today: (i) microelectrophoresis, which permits to evaluate surface modifications by measuring eletrophoretic mobility; and (ii) atomic force microscopy (AFM), a high resolution imaging device, which allows investigations at nanometric scale. After brief presentation of principles and instrumentations, the aim of this article is to present the different applications of these techniques in Microbiology, and to discuss interest of these tools in order to investigate mechanism of action of antibacterial compounds.
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Affiliation(s)
- M Grare
- Groupe d'Etude des Vecteurs Supramoléculaires du Médicament, UMR 7565, CNRS, Faculté de Pharmacie, Nancy Université, 5, rue Albert-Lebrun, BP 80403, 54001, Nancy Cedex, France
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Grare M, Mourer M, Fontanay S, Regnouf-de-Vains JB, Finance C, Duval RE. In vitro activity of para-guanidinoethylcalix[4]arene against susceptible and antibiotic-resistant Gram-negative and Gram-positive bacteria. J Antimicrob Chemother 2007; 60:575-81. [PMID: 17626025 DOI: 10.1093/jac/dkm244] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES Emergence of multidrug-resistant bacteria has encouraged vigorous efforts to develop antimicrobial agents with new mechanisms of action. In this study, the in vitro antibacterial activity of para-guanidinoethylcalix[4]arene was evaluated and compared with that of its constitutive monomer, para-guanidinoethylphenol. Hexamidine, a widely used antiseptic, and synthalin A, an old antidiabetic and anti-trypanosomal compound, were chosen as references. METHODS MIC and MBC were determined for five reference strains (Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923 and ATCC 29213, Enterococcus faecalis ATCC 29212 and Pseudomonas aeruginosa ATCC 27853), as well as five antibiotic-resistant clinical isolates. Toxicity on MRC-5 and HaCaT eukaryotic cell lines was also evaluated by MTT and Neutral Red assays. RESULTS No antibacterial activity was observed for para-guanidinoethylphenol (MIC >or= 512 mg/L) and synthalin A (MIC >or= 64 mg/L). Conversely, para-guanidinoethylcalix[4]arene and hexamidine: (i) showed a broad antibacterial spectrum, both on Gram-positive and on Gram-negative bacteria (MIC = 4 mg/L against E. coli and 8 mg/L against S. aureus for para-guanidinoethylcalix[4]arene), to a lesser degree against E. faecalis and P. aeruginosa (MIC = 32 mg/L); (ii) were bacteriostatic (MBC >or= 256 mg/L); and (iii) MICs and MBCs obtained for clinical isolates were similar to those obtained with reference strains. Both compounds, the monomer and the calixarene, showed no apparent cytotoxicity, whereas hexamidine and synthalin A had significant toxic effects that increased with time and concentration and in a range of 100-1000 times that for calixarene. CONCLUSIONS In conclusion, results confirm para-guanidinoethylcalix[4]arene as a broad-spectrum new agent or an auxiliary in antimicrobial chemotherapy.
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Affiliation(s)
- Marion Grare
- Groupe d'Etude des Vecteurs Supramoléculaires du Médicament, UMR 7565, Nancy-Université-CNRS, Faculté de Pharmacie, 5 rue Albert Lebrun, BP 80403, 54001 Nancy Cedex, France
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Grare M, Mourer M, Regnouf de Vains JB, Finance C, Duval RE. Vers de nouvelles molécules antibactériennes. Intérêt du para-guanidinoéthylcalix[4]arène. ACTA ACUST UNITED AC 2006; 54:470-6. [PMID: 17023121 DOI: 10.1016/j.patbio.2006.07.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Accepted: 07/21/2006] [Indexed: 11/26/2022]
Abstract
We present here the results concerning the antibacterial properties evaluation of para-guanidinoethylcalix[4]arene, compared with its constitutive monomer, the para-guanidinoethylphenol, and hexamidine (Hexomédine), an antiseptic from the diamidine family widely used in therapeutic, chosen as a reference in this study for its resemblance in terms of functional groups. Antibacterial activities of those three compounds were evaluated by microdilution methods, in Mueller Hinton broth, onto 5 bacterial strains: Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 25923 & ATCC 29213 and Enterococcus faecalis ATCC 29212, according to CA-SFM and CLSI (formerly NCCLS) approved standards. In parallel, the effects of these three compounds on MRC-5 eukaryotic cell viability were evaluated with MTT assay. The results obtained here confirm a lack of activity for the monomer compound (MIC> or =512 mg/l) and a real antibacterial activity for the calixarene, comparable to hexamidine. This activity is expressed, both on Gram+and Gram- bacteria (MIC=4 mg/l for E. coli, 8 mg/l on both S. aureus strains) and at a lesser degree on E. faecalis and P. aeruginosa (MIC=32 mg/l). Similarly, both compounds, monomer and calixarene, slightly induce any modification on MRC-5 cells viability, and this until 168 h of treatment for concentrations reaching 10(-4) mol/L while hexamidine demonstrates a significant and increasing effect during the time of experiment and this for 100 to 1000 times lower concentrations. Thus, this study tends to confirm the significance of the organization of the para-guanidinoethylphenol monomer into its cyclic calixarenic tetramer for the gain of an antibacterial activity, similar to a widely used antiseptic one.
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Affiliation(s)
- M Grare
- Groupe d'étude des vecteurs supramoléculaires du médicament, (GEVSM), faculté de pharmacie, UMR 7565, Nancy-Université, CNRS, 5 rue Albert-Lebrun, BP 80403, 54001 Nancy cedex, France
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Mourer M, Duval RE, Finance C, Regnouf-de-Vains JB. Functional organisation and gain of activity: The case of the antibacterial tetra-para-guanidinoethyl-calix[4]arene. Bioorg Med Chem Lett 2006; 16:2960-3. [PMID: 16563763 DOI: 10.1016/j.bmcl.2006.02.072] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Revised: 02/23/2006] [Accepted: 02/25/2006] [Indexed: 11/17/2022]
Abstract
The antibacterial activities of the para-guanidinoethylphenol and of its cyclic tetramer, the tetra-para-guanidinoethyl-calix[4]arene, have been evaluated on reference gram-positive and gram-negative bacteria. Antibiotic disk diffusion assays completed by micromethod technique were employed to determine if a synergistic effect could be expected from the spatial organisation of the monomer into its cyclic tetrameric analogue. Disk diffusion assays and microdilution experiments revealed better properties for the calixarene species, with a real and important gain of activity with regards to the monomer.
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Affiliation(s)
- Maxime Mourer
- Unité Mixte de Recherche UHP-CNRS 7565, Université Henri Poincaré, Nancy1 Groupe d'Etude des Vecteurs Supramoléculaires du Médicament, Faculté de Pharmacie, 5, rue Albert Lebrun, BP 80403, 54001 Nancy Cedex, France
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