1
|
Pharmacologically Safe Nanomicelles of Amphotericin B With Lipids: Nuclear Magnetic Resonance and Molecular Docking Approach. J Pharm Sci 2017; 106:3574-3582. [DOI: 10.1016/j.xphs.2017.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/10/2017] [Accepted: 08/14/2017] [Indexed: 11/18/2022]
|
2
|
Mobasheri M, Attar H, Rezayat Sorkhabadi SM, Khamesipour A, Jaafari MR. Solubilization Behavior of Polyene Antibiotics in Nanomicellar System: Insights from Molecular Dynamics Simulation of the Amphotericin B and Nystatin Interactions with Polysorbate 80. Molecules 2015; 21:E6. [PMID: 26712721 PMCID: PMC6273564 DOI: 10.3390/molecules21010006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 01/23/2023] Open
Abstract
Amphotericin B (AmB) and Nystatin (Nys) are the drugs of choice for treatment of systemic and superficial mycotic infections, respectively, with their full clinical potential unrealized due to the lack of high therapeutic index formulations for their solubilized delivery. In the present study, using a coarse-grained (CG) molecular dynamics (MD) simulation approach, we investigated the interaction of AmB and Nys with Polysorbate 80 (P80) to gain insight into the behavior of these polyene antibiotics (PAs) in nanomicellar solution and derive potential implications for their formulation development. While the encapsulation process was predominantly governed by hydrophobic forces, the dynamics, hydration, localization, orientation, and solvation of PAs in the micelle were largely controlled by hydrophilic interactions. Simulation results rationalized the experimentally observed capability of P80 in solubilizing PAs by indicating (i) the dominant kinetics of drugs encapsulation over self-association; (ii) significantly lower hydration of the drugs at encapsulated state compared with aggregated state; (iii) monomeric solubilization of the drugs; (iv) contribution of drug-micelle interactions to the solubilization; (v) suppressed diffusivity of the encapsulated drugs; (vi) high loading capacity of the micelle; and (vii) the structural robustness of the micelle against drug loading. Supported from the experimental data, our simulations determined the preferred location of PAs to be the core-shell interface at the relatively shallow depth of 75% of micelle radius. Deeper penetration of PAs was impeded by the synergistic effects of (i) limited diffusion of water; and (ii) perpendicular orientation of these drug molecules with respect to the micelle radius. PAs were solvated almost exclusively in the aqueous poly-oxyethylene (POE) medium due to the distance-related lack of interaction with the core, explaining the documented insensitivity of Nys solubilization to drug-core compatibility in detergent micelles. Based on the obtained results, the dearth of water at interior sites of micelle and the large lateral occupation space of PAs lead to shallow insertion, broad radial distribution, and lack of core interactions of the amphiphilic drugs. Hence, controlled promotion of micelle permeability and optimization of chain crowding in palisade layer may help to achieve more efficient solubilization of the PAs.
Collapse
Affiliation(s)
- Meysam Mobasheri
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
| | - Hossein Attar
- Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
- Tofigh Daru Research and Engineering Company (TODACO), Tehran 1397116359, Iran.
| | - Seyed Mehdi Rezayat Sorkhabadi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran 1417755469, Iran.
- Department of Toxicology and Pharmacology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran 193956466, Iran.
| | - Ali Khamesipour
- Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, Tehran 1416613675, Iran.
| | - Mahmoud Reza Jaafari
- Biotechnology Research Center, Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, P. O. Box: 91775-1365, Mashhad 917751365, Iran.
| |
Collapse
|
3
|
The characterizing of the interaction of amphotericin B with cholesteryl esters. J Mol Liq 2009. [DOI: 10.1016/j.molliq.2008.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
4
|
Baran M, Borowski E, Mazerski J. Molecular modeling of amphotericin B–ergosterol primary complex in water II. Biophys Chem 2009; 141:162-8. [DOI: 10.1016/j.bpc.2009.01.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2008] [Revised: 01/23/2009] [Accepted: 01/23/2009] [Indexed: 11/27/2022]
|
5
|
Baginski M, Cybulska B, Gruszecki WI. Chapter 9 Interaction of Polyene Macrolide Antibiotics with Lipid Model Membranes. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s1554-4516(05)03009-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
|
6
|
Sternal K, Czub J, Baginski M. Molecular aspects of the interaction between amphotericin B and a phospholipid bilayer: molecular dynamics studies. J Mol Model 2004; 10:223-32. [PMID: 15118877 DOI: 10.1007/s00894-004-0190-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Accepted: 03/09/2004] [Indexed: 11/24/2022]
Abstract
Amphotericin B (AmB) is a polyene macrolide antibiotic used to treat systemic fungal infections. The molecular mechanism of AmB action is still only partly characterized. AmB interacts with cell-membrane components and forms membrane channels that eventually lead to cell death. The interaction between AmB and the membrane surface can be regarded as the first (presumably crucial) step on the way to channel formation. In this study molecular dynamics simulations were performed for an AmB-lipid bilayer model in order to characterize the molecular aspects of AmB-membrane interactions. The system studied contained a box of 200 dimyristoylphosphatidylcholine (DMPC) molecules, a single AmB molecule placed on the surface of the lipid bilayer and 8,065 water molecules. Two molecular dynamics simulations (NVT ensemble), each lasting 1 ns, were performed for the model studied. Two different programs, CHARMM and NAMD2, were used in order to test simulation conditions. The analysis of MD trajectories brought interesting information concerning interactions between polar groups of AmB and both DMPC and water molecules. Our studies show that AmB preferentially took a vertical position, perpendicular to the membrane surface, with no propensity to enter the membrane. Our finding may suggest that a single AmB molecule entering the membrane is very unlikely.
Collapse
Affiliation(s)
- Kamil Sternal
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, Narutowicza St 11/12, 80-952 Gdansk, Poland
| | | | | |
Collapse
|
7
|
Resat H, Sungur FA, Baginski M, Borowski E, Aviyente V. Conformational properties of amphotericin B amide derivatives--impact on selective toxicity. J Comput Aided Mol Des 2000; 14:689-703. [PMID: 11008890 DOI: 10.1023/a:1008144208706] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Even though it is highly toxic, Amphotericin B (AmB), an amphipathic polyene macrolide antibiotic, is used in the treatment of severe systemic fungal infections as a life-saving drug. To examine the influence of conformational factors on selective toxicity of these compounds, we have investigated the conformational properties of five AmB amide derivatives. It was found that the extended conformation with torsional angles (phi,psi)=(290 degrees,180 degrees) is a common minimum of the potential energy surfaces (PES) of unsubstituted AmB and its amide derivatives. The extended conformation of the studied compounds allows for the formation of an intermolecular hydrogen bond network between adjacent antibiotic molecules in the open channel configuration. Therefore, the extended conformation is expected to be the dominant conformer in an open AmB (or its amide derivatives) membrane channel. The derivative compounds for calculations were chosen according to their selective toxicity compared to AmB and they had a wide range of selective toxicity. Except for two AmB derivatives, the PES maps of the derivatives reveal that the molecules can coexist in more than one conformer. Taking into account the cumulative conclusions drawn from the earlier MD simulation studies of AmB membrane channel, the results of the potential energy surface maps, and the physical considerations of the molecular structures, we hypothesize a new model of structure-selective toxicity of AmB derivatives. In this proposed model the presence of the extended conformation as the only well defined global conformer for AmB derivatives is taken as the indicator of their higher selective toxicity. This model successfully explains our results. To further test our model, we also investigated an AmB derivative whose selective toxicity has not been experimentally measured before. Our prediction for the selective toxicity of this compound can be tested in experiments to validate or invalidate the proposed model.
Collapse
Affiliation(s)
- H Resat
- Koç University, School of Arts and Sciences, Istinye Istanbul, Turkey.
| | | | | | | | | |
Collapse
|
8
|
Borowski E. Novel approaches in the rational design of antifungal agents of low toxicity. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2000; 55:206-8. [PMID: 10919084 DOI: 10.1016/s0014-827x(00)00024-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This paper presents an overview of studies on novel strategies for the rational design of antifungal agents of low toxicity and overcoming the multidrug resistance (MDR) of fungi. This goal was achieved both due to the introduction of a novel target, glucosamine-6-phosphate synthase, as well as to the recognition of molecular basis of selectivity of action of amphotericin B derivatives.
Collapse
Affiliation(s)
- E Borowski
- Department of Pharmaceutical Technology and Biochemistry, Technical University of Gdansk, Poland.
| |
Collapse
|
9
|
Millié P, Langlet J, Bergès J, Caillet J, Demaret JP. Self-Association of Amphotericin B in Water. Theoretical Energy and Spectroscopy Studies. J Phys Chem B 1999. [DOI: 10.1021/jp990539n] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philippe Millié
- CEA., DSM/DRECAM, Service des photons, atomes et molécules, Centre D'Etudes De Saclay, 91191 Gif Sur Yvette, France
| | - Jacqueline Langlet
- Laboratoire de Chimie Théorique, Université Pierre et Marie Curie, 4 Place Jussieu, 75005 Paris, France
| | - Jacqueline Bergès
- Laboratoire de Chimie Théorique, Université Pierre et Marie Curie, 4 Place Jussieu, 75005 Paris, France
| | - Jacqueline Caillet
- Laboratoire de Chimie Théorique, Université Pierre et Marie Curie, 4 Place Jussieu, 75005 Paris, France
| | | |
Collapse
|
10
|
Baginski M, Gariboldi P, Bruni P, Borowski E. Conformational analysis of Amphotericin B. Biophys Chem 1997; 65:91-100. [PMID: 17029848 DOI: 10.1016/s0301-4622(96)02265-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/1996] [Revised: 12/03/1996] [Accepted: 12/05/1996] [Indexed: 10/18/2022]
Abstract
Within a theoretical approach to the problem of antifungal action of Amphotericin B (AmB), a conformational analysis of the neutral and zwitterionic form of this antibiotic in vacuo was performed by the MM2P and AM1 methods. The analysis was carried out with regard to the mutual orientation of the macrolidic and glycosidic fragments of the molecule, which is defined by the phi and psi steric angles. This orientation defines the overall shape of the molecule and is postulated to be important for the antifungal action of the drug. As a result of the MM2P calculations, phi, psi steric energy and population maps were prepared. Several conformers were found on these maps but only two of them (one each for the zwitterionic and the neutral forms of the antibiotic) were previously observed experimentally for isolated molecules. Our other calculated conformers were not observed experimentally but we propose that they may also appear in the AmB channel structure. The results of our conformational analysis were compared with experimental NMR data (nuclear Overhauser effects between selected hydrogen atoms) obtained previously. New structural information obtained for AmB in the present work will be useful for building a molecular model of AmB-target interactions as well as for designing new derivatives of AmB.
Collapse
Affiliation(s)
- M Baginski
- Department of Pharmaceutical Technology and Biochemistry, Technical University of Gdansk, Narutowicza St. 11/12, 80-952 Gdansk, Poland.
| | | | | | | |
Collapse
|
11
|
Baginski M, Borowski E. Distribution of electrostatic potential around amphotericin B and its membrane targets. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0166-1280(96)04585-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
12
|
Abstract
Molecular dynamics simulations were performed for a dimer of the antifungal antibiotic, amphotericin B, in water. In the first step of the work three appropriately selected versions of the dimer structure were taken into consideration. In each version antibiotic molecules were placed antiparallel with polar and ionizable groups outside the hydrophobic core formed by polyene chromophores. During short dynamic simulations versions of the dimer structure were compared in respect of the energy of dimerization. The highest energy was observed for the structure in which polyene chromophores superimposed each other as much as possible and this version was subjected to the main simulation. The analysis of 66 snapshot geometries stored during 33 ps dynamic trajectory allowed us to draw three main conclusions: (i) the relative orientation of the amino-sugar moiety and chromophore as well as conformation of the antibiotic macrolide ring were different in both molecules and could exhibit dynamic changes, (ii) the dimer structure exhibited intrinsic asymmetry which could be responsible for characteristic circular dichroism spectra of the aggregated form of the antibiotic, (iii) relatively high stability of the dimer structure resulted not only from hydrophobic interactions between chromophores but also from hydrogen bonds networks that were observed around polar terminals of antibiotic molecules. Implications of these features of the dimer structure for its susceptibility on the ionic state of carboxyl and/or amino groups are also discussed.
Collapse
Affiliation(s)
- J Mazerski
- Department of Pharmaceutical Technology and Biochemistry, Technical University of Gdańsk, Poland
| | | |
Collapse
|