1
|
Sharma VK, Gupta J, Mitra JB, Srinivasan H, Sakai VG, Ghosh SK, Mitra S. The Physics of Antimicrobial Activity of Ionic Liquids. J Phys Chem Lett 2024; 15:7075-7083. [PMID: 38950375 DOI: 10.1021/acs.jpclett.4c01066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
The bactericidal potency of ionic liquids (ILs) is well-established, yet their precise mechanism of action remains elusive. Here, we show evidence that the bactericidal action of ILs primarily involves the permeabilization of the bacterial cell membrane. Our findings reveal that ILs exert their effects by directly interacting with the lipid bilayer and enhancing the membrane dynamics. Lateral lipid diffusion is accelerated, which in turn augments membrane permeability, ultimately leading to bacterial death. Furthermore, our results establish a significant connection: an increase in the alkyl chain length of ILs correlates with a notable enhancement in both lipid lateral diffusion and antimicrobial potency. This underscores a compelling correlation between membrane dynamics and antimicrobial effectiveness, providing valuable insights for the rational design and optimization of IL-based antimicrobial agents in healthcare applications.
Collapse
Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - J Gupta
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - J Bhatt Mitra
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - H Srinivasan
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - V García Sakai
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - S K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH91, Tehsil Dadri, G. B. Nagar Uttar Pradesh 201314, India
| | - S Mitra
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| |
Collapse
|
2
|
Itoh T, Kamada K, Nokami T, Ikawa T, Yagi K, Ikegami S, Inoue R, DeYoung AD, Kim HJ. On the Moisture Absorption Capability of Ionic Liquids. J Phys Chem B 2024; 128:6134-6150. [PMID: 38874477 PMCID: PMC11215776 DOI: 10.1021/acs.jpcb.4c02289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 06/15/2024]
Abstract
Due to their many attractive physicochemical properties, ionic liquids (ILs) have received extensive attention with numerous applications proposed in various fields of science and technology. Despite this, the molecular origins of many of their properties, such as the moisture absorption capability, are still not well understood. For insight into this, we systematically synthesized 24 types of ILs by the combination of the dimethyl phosphate anion with various types of alkyl group-substituted cyclic cations─imidazolium, pyrazolium, 1,2,3-triazolium, and 1,2,4-triazolium cations─and performed a detailed analysis of the dehumidification properties of these ILs and their aqueous solutions. It was found that these IL systems have a high dehumidification capability (DC). Among the monocationic ILs, the best performance was obtained with 1-cyclohexylmethyl-4-methyl-1,2,4-triazolium dimethyl phosphate, whose DC (per mol) value is 14 times higher than that of popular solid desiccants like CaCl2 and silica gel. Dicationic ILs, such as 1,1'-(propane-1,3-diyl)bis(4-methyl-1,2,4-triazolium) bis(dimethyl phosphate), showed an even better moisture absorption, with a DC (per mol) value about 20 times higher than that of CaCl2. Small- and wide-angle X-ray scattering measurements of eight types of 1,2,4-triazolium dimethyl phosphate ILs were performed and revealed that the majority of these ILs form nanostructures. Such nanostructures, which vary with the identity of the IL and the water content, fall into three main categories: bicontinuous microemulsions, hexagonal cylinders, and micelle-like structures. Water in the solutions exists primarily in polar regions in the nanostructures; these spaces function as water pockets at relatively low water concentrations. Since the structure and stability of the aggregated forms of the ILs are mainly governed by the interactions of nonpolar groups, the alkyl side chains of the cations play an important role in the DC and temperature-dependent equilibrium water vapor pressure of the IL solutions. Our experimental findings and molecular dynamics simulation results shed light on the moisture absorption mechanism of the IL aqueous solutions from a molecular perspective.
Collapse
Affiliation(s)
- Toshiyuki Itoh
- Toyota
Physical and Chemical Research Institute, 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Kentaro Kamada
- Department
of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
| | - Toshiki Nokami
- Department
of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori 680-8552, Japan
| | - Taiji Ikawa
- Toyota
Central R&D Laboratories, Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Kenichi Yagi
- Toyota
Central R&D Laboratories, Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Shuji Ikegami
- Technology
and Innovation Center, Daikin Industries,
Ltd., 1-1 Nishi-Hitotsuya, Settsu, Osaka 566-8585, Japan
| | - Ryo Inoue
- Technology
and Innovation Center, Daikin Industries,
Ltd., 1-1 Nishi-Hitotsuya, Settsu, Osaka 566-8585, Japan
| | - Andrew D. DeYoung
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Hyung J. Kim
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
3
|
Egorova KS, Kibardin AV, Posvyatenko AV, Ananikov VP. Mechanisms of Biological Effects of Ionic Liquids: From Single Cells to Multicellular Organisms. Chem Rev 2024; 124:4679-4733. [PMID: 38621413 DOI: 10.1021/acs.chemrev.3c00420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
The review presents a detailed discussion of the evolving field studying interactions between ionic liquids (ILs) and biological systems. Originating from molten salt electrolytes to present multiapplication substances, ILs have found usage across various fields due to their exceptional physicochemical properties, including excellent tunability. However, their interactions with biological systems and potential influence on living organisms remain largely unexplored. This review examines the cytotoxic effects of ILs on cell cultures, biomolecules, and vertebrate and invertebrate organisms. Our understanding of IL toxicity, while growing in recent years, is yet nascent. The established findings include correlations between harmful effects of ILs and their ability to disturb cellular membranes, their potential to trigger oxidative stress in cells, and their ability to cause cell death via apoptosis. Future research directions proposed in the review include studying the distribution of various ILs within cellular compartments and organelles, investigating metabolic transformations of ILs in cells and organisms, detailed analysis of IL effects on proteins involved in oxidative stress and apoptosis, correlation studies between IL doses, exposure times and resulting adverse effects, and examination of effects of subtoxic concentrations of ILs on various biological objects. This review aims to serve as a critical analysis of the current body of knowledge on IL-related toxicity mechanisms. Furthermore, it can guide researchers toward the design of less toxic ILs and the informed use of ILs in drug development and medicine.
Collapse
Affiliation(s)
- Ksenia S Egorova
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Alexey V Kibardin
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Ministry of Health of Russian Federation, Moscow 117198, Russia
| | - Alexandra V Posvyatenko
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Ministry of Health of Russian Federation, Moscow 117198, Russia
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| |
Collapse
|
4
|
Caselli L, Nylander T, Malmsten M. Neutron reflectometry as a powerful tool to elucidate membrane interactions of drug delivery systems. Adv Colloid Interface Sci 2024; 325:103120. [PMID: 38428362 DOI: 10.1016/j.cis.2024.103120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/03/2024]
Abstract
The last couple of decades have seen an explosion of novel colloidal drug delivery systems, which have been demonstrated to increase drug efficacy, reduce side-effects, and provide various other advantages for both small-molecule and biomacromolecular drugs. The interactions of delivery systems with biomembranes are increasingly recognized to play a key role for efficient eradication of pathogens and cancer cells, as well as for intracellular delivery of protein and nucleic acid drugs. In parallel, there has been a broadening of methodologies for investigating such systems. For example, advanced microscopy, mass-spectroscopic "omic"-techniques, as well as small-angle X-ray and neutron scattering techniques, which only a few years ago were largely restricted to rather specialized areas within basic research, are currently seeing increased interest from researchers within wide application fields. In the present discussion, focus is placed on the use of neutron reflectometry to investigate membrane interactions of colloidal drug delivery systems. Although the technique is still less extensively employed for investigations of drug delivery systems than, e.g., X-ray scattering, such studies may provide key mechanistic information regarding membrane binding, re-modelling, translocation, and permeation, of key importance for efficacy and toxicity of antimicrobial, cancer, and other therapeutics. In the following, examples of this are discussed and gaps/opportunities in the research field identified.
Collapse
Affiliation(s)
| | - Tommy Nylander
- Physical Chemistry 1, Lund University, S-221 00 Lund, Sweden
| | - Martin Malmsten
- Physical Chemistry 1, Lund University, S-221 00 Lund, Sweden; Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark.
| |
Collapse
|
5
|
Benedetto A. Ionic liquids meet lipid bilayers: a state-of-the-art review. Biophys Rev 2023; 15:1909-1939. [PMID: 38192351 PMCID: PMC10771448 DOI: 10.1007/s12551-023-01173-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 11/29/2023] [Indexed: 01/10/2024] Open
Abstract
In the past 25 years, a vast family of complex organic salts known as room-temperature ionic liquids (ILs) has received increasing attention due to their potential applications. ILs are composed by an organic cation and either an organic or inorganic anion, and possess several intriguing properties such as low vapor pressure and being liquid around room temperature. Several biological studies flagged their moderate-to-high (cyto)-toxicity. Toxicity is, however, also a synonym of affinity, and this boosted a series of biophysical and chemical-physical investigations aimed at exploiting ILs in bio-nanomedicine, drug-delivery, pharmacology, and bio-nanotechnology. Several of these investigations focused on the interaction between ILs and lipid membranes, aimed at determining the microscopic mechanisms behind their interaction. This is the focus of this review work. These studies have been carried out on a variety of different lipid bilayer systems ranging from 1-lipid to 5-lipids systems, and also on cell-extracted membranes. They have been carried out at different chemical-physical conditions and by the use of a number of different approaches, including atomic force microscopy, neutron and X-ray scattering, dynamic light scattering, differential scanning calorimetry, surface quartz microbalance, nuclear magnetic resonance, confocal fluorescence microscopy, and molecular dynamics simulations. The aim of this "2023 Michèle Auger Award" review work is to provide the reader with an up-to-date overview of this fascinating research field where "ILs meet lipid bilayers (aka biomembranes)," with the aim to boost it further and expand its cross-disciplinary edges towards novel high-impact ideas/applications in pharmacology, drug delivery, biomedicine, and bio-nanotechnology.
Collapse
Affiliation(s)
- Antonio Benedetto
- School of Physics, University College Dublin, Dublin, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
- Department of Science, University of Roma Tre, Rome, Italy
- Laboratory for Neutron Scattering, Paul Scherrer Institute, Villigen, Switzerland
| |
Collapse
|
6
|
Sharma G, Seth A, Giri RP, Hayen N, Murphy BM, Ghosh SK. Ionic Liquid-Induced Assembly of DNA at Air-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16079-16089. [PMID: 37922422 DOI: 10.1021/acs.langmuir.3c02212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
DNA nanotechnology is the future of many products in the pharmaceutical and cosmetic industries. Self-assembly of this negatively charged biopolymer at surfaces and interfaces is an essential step to elaborate its field of applications. In this study, the ionic liquid (IL) monolayer-assisted self-assembly of DNA macromolecules at the air-water interface has been closely monitored by employing various quantitative techniques, namely, surface pressure-area (π-A) isotherms, surface potential, interfacial rheology, and X-ray reflectivity (XRR). The π-A isotherms reveal that the IL 1,3-didecyl 3-methyl imidazolium chloride induces DNA self-assembly at the interface, leading to a thick viscoelastic film. The interfacial rheology exhibits a notable rise in the viscoelastic modulus as the surface pressure increases. The values of storage and loss moduli measured as a function of strain frequency suggest a relaxation frequency that depends on the length of the macromolecule. The XRR measurements indicate a considerable increase in DNA layer thickness at the elevated surface pressures depending on the number of base pairs of the DNA. The results are considered in terms of the electrostatic and hydrophobic interactions, allowing a quantitative conclusion about the arrangement of DNA strands underneath the monolayer of the ILs at the air-water interface.
Collapse
Affiliation(s)
- Gunjan Sharma
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - Ajit Seth
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - Rajendra P Giri
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Nicolas Hayen
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Bridget M Murphy
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| |
Collapse
|
7
|
Mitra S, Sharma VK, Ghosh SK. Effects of ionic liquids on biomembranes: A review on recent biophysical studies. Chem Phys Lipids 2023; 256:105336. [PMID: 37586678 DOI: 10.1016/j.chemphyslip.2023.105336] [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: 06/07/2023] [Revised: 07/05/2023] [Accepted: 08/11/2023] [Indexed: 08/18/2023]
Abstract
Ionic liquids (ILs) have been emerged as a versatile class of compounds that can be easily tuned to achieve desirable properties for various applications. The ability of ILs to interact with biomembranes has attracted significant interest, as they have been shown to modulate membrane properties in ways that may have implications for various biological processes. This review provides an overview of recent studies that have investigated the interaction between ILs and biomembranes. We discuss the effects of ILs on the physical and chemical properties of biomembranes, including changes in membrane fluidity, permeability, and stability. We also explore the mechanisms underlying the interaction of ILs with biomembranes, such as electrostatic interactions, hydrogen bonding, and van der Waals forces. Additionally, we discuss the future prospects of this field.
Collapse
Affiliation(s)
- Saheli Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India.
| | - Veerendra K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India.
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH 91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India.
| |
Collapse
|
8
|
Giri RP, Mukhopadhyay MK. Humidity-Responsive Polymer Cushion-Supported Biomimetic Membrane: A Model System for X-ray Studies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15294-15302. [PMID: 36463523 DOI: 10.1021/acs.langmuir.2c02533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
An effort aimed at replacing the conventional water column by a relative humidity (RH) environment for structural investigation of a soft polymer cushion-supported model phospholipid membrane has been reported. An RH-responsive well-hydrated polymer cushion layer capable of approximately 2-fold swellability under RH 96% has been employed for phospholipid model membrane fabrication. To validate the proposed method, supported lipid bilayers (SLBs) of phosphocholine and phosphoethanolamine were deposited and structurally characterized at molecular level by the X-ray scattering method. In addition, the molecular interaction of the porphyrin-based hemin molecule, having a drug-like structure, with the supported membrane has been studied for further validation. The swelling behavior of the polymer cushion has been studied at a range of RH values prior to the bilayer deposition. The RH environment, in comparison to the conventional water column, enhanced the dynamic range approximately by 100-fold and the structural resolution by 2-fold. Thus, the bilayer structural features can be assessed without being overwhelmed by the background signals from the traditional water column. This facilitates in extracting reliable layer parameters and exogenous molecule-induced minute changes from the model fit. The proposed method will have far-reaching implications in biosensor engineering, protein-lipid, and drug-lipid interaction studies, X-ray microscopy, imaging, and photon correlation spectroscopy studies from SLBs where acquiring sufficient scattered intensity is still a challenge. This study also predicts that lab-based rotating-anode X-ray instruments can potentially be an alternative to the hard-access synchrotron experiments on biomimetic membranes, keeping the dynamic range and structural resolution uncompromised.
Collapse
Affiliation(s)
- Rajendra P Giri
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata700064, West Bengal, India
- Institute for Experimental and Applied Physics, Kiel University, 24118Kiel, Germany
| | - Mrinmay K Mukhopadhyay
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata700064, West Bengal, India
| |
Collapse
|
9
|
Defeat undefeatable: ionic liquids as novel antimicrobial agents. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
10
|
Hao XL, Cao B, Dai D, Wu FG, Yu ZW. Cholesterol Protects the Liquid-Ordered Phase of Raft Model Membranes from the Destructive Effect of Ionic Liquids. J Phys Chem Lett 2022; 13:7386-7391. [PMID: 35925657 DOI: 10.1021/acs.jpclett.2c01873] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ionic liquids (ILs), although being a class of promising green solvents, have received many reports on the toxicity to living organisms. In this work, aiming at elucidating the disruptive effect of ILs to cell membrane lipid rafts, we investigated the effect of three 1-octylimidazolium-based ILs on the properties of the liquid ordered phase (Lo, a commonly used lipid raft model) of egg sphingomyelin (SM)-cholesterol model membrane. We found that, in the absence of cholesterol, a very low IL:SM molar ratio of 0.01:1 could disrupt the integrity of the bilayer structure. In sharp contrast, the presence of cholesterol in lipid bilayers helps the Lo phase resist the damaging effect of the ILs. For the role of the IL headgroup, we found that the mono- and trisubstituted species show a stronger destructive effect on the structures of the model rafts than the commonly used disubstituted counterpart.
Collapse
Affiliation(s)
- Xiao-Lei Hao
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Bobo Cao
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Dong Dai
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Zhi-Wu Yu
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| |
Collapse
|
11
|
Thermodynamics and In-Plane Viscoelasticity of Anionic Phospholipid Membranes Modulated by an Ionic Liquid. Pharm Res 2022; 39:2447-2458. [PMID: 35902532 DOI: 10.1007/s11095-022-03348-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/20/2022] [Indexed: 11/27/2022]
Abstract
This article presents the effects of an imidazolium-based ionic liquid (IL) on the thermodynamics and in-plane viscoelastic properties of model membranes of anionic phospholipids. The negative Zeta potential of multilamellar vesicles of 14 carbon lipid 1,2-dimyristoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (DMPG) is observed to reduce due to the presence of few mole % of an IL 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]). The effect was found to be stronger on enhancing the chain length of the lipid. The surface pressure-area isotherms of lipid monolayer formed at air-water interface are modified by the IL reducing the effective area per molecule. Further, the equilibrium elasticity of the film is altered depending upon the thermodynamic phase of the lipids. While the presence of the IL in the DMPG lipid makes it ordered in the gel phase by reducing the entropy, the effect is opposite in the fluid phase. The in-plane viscoelastic parameters of the lipid film is quantified by dilation rheology using the oscillatory barriers of a Langmuir trough. Even though the low chain lipid DMPG does not show any effect of IL on its storage and loss moduli, the longer chain lipids exhibit a prominent effect in the liquid extended (LE) phase. Further, the dynamic response of the lipid film is found to be distinctly different in the liquid condensed (LC) phase from that of the LE phase.
Collapse
|
12
|
Sharma VK, Mamontov E. Multiscale lipid membrane dynamics as revealed by neutron spectroscopy. Prog Lipid Res 2022; 87:101179. [PMID: 35780913 DOI: 10.1016/j.plipres.2022.101179] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/25/2022] [Accepted: 06/27/2022] [Indexed: 12/22/2022]
Abstract
The plasma membrane is one of the principal structural components of the cell and, therefore, one of the key components of the cellular life. Because the membrane's dynamics links the membrane's structure and function, the complexity and the broad range of the membrane's motions are essential for the enormously diverse functionality of the cell membrane. Even for the main membrane component, the lipid bilayer, considered alone, the range and complexity of the lipid motions are remarkable. Spanning the time scale from sub-picosecond to minutes and hours, the lipid motion in a bilayer is challenging to study even when a broad array of dynamic measurement techniques is employed. Neutron scattering plays a special role among such dynamic measurement techniques, particularly, because it involves the energy transfers commensurate with the typical intra- and inter- molecular dynamics and the momentum transfers commensurate with intra- and inter-molecular distances. Thus, using neutron scattering-based techniques, the spatial and temporal information on the lipid motion can be obtained and analysed simultaneously. Protium vs. deuterium sensitivity and non-destructive character of the neutron probe add to the remarkable prowess of neutron scattering for elucidating the lipid dynamics. Herein we present an overview of the neutron scattering-based studies of lipid dynamics in model membranes, with a discussion of the direct relevance and implications to the real-life cell membranes. The latter are much more complex systems than simple model membranes, consisting of heterogeneous non-stationary domains composed of lipids, proteins, and other small molecules, such as carbohydrates. Yet many fundamental aspects of the membrane behavior and membrane interactions with other molecules can be understood from neutron scattering measurements of the model membranes. For example, such studies can provide a great deal of information on the interactions of antimicrobial compounds with the lipid matrix of a pathogen membrane, or the interactions of drug molecules with the plasma membrane. Finally, we briefly discuss the recently emerging field of neutron scattering membrane studies with a reach far beyond the model membrane systems.
Collapse
Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - E Mamontov
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| |
Collapse
|
13
|
Gupta R, Sharma VK, Gupta J, Ghosh SK. 1,3 Dialkylated Imidazolium Ionic Liquid Causes Interdigitated Domains in a Phospholipid Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3412-3421. [PMID: 35263113 DOI: 10.1021/acs.langmuir.1c03160] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Amphiphilic imidazolium-based ionic liquids (ILs) have proven their efficacy in altering the membrane integrity and dynamics. The present article investigates the phase-separated domains in a 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) membrane induced by 1,3 dialkylated imidazolium IL. Isotherm measurements on DPPC monolayers formed at the air-water interface have shown a decrease in the mean molecular area with the addition of this IL. The positive value of the excess Gibbs free energy of mixing indicates an unfavorable mixing of the IL into the lipid. This leads to IL-induced phase-separated domains in the multilayer of the lipid confirmed by the occurrence of two sets of equidistance peaks in the X-ray reflectivity data. The electron density profile along the surface normal obtained by the swelling method shows the bilayer thickness of the newly formed IL-rich phase to be substantially lower (∼34 Å) than the DPPC phase (∼45.8 Å). This IL-rich phase has been confirmed to be interdigitated, showing an enhanced electron density in the tail region due to the overlapping hydrocarbon chains. Differential scanning calorimetry measurements showed that the incorporation of IL enhances the fluidity of the lipid bilayer. Therefore, the study indicates the formation of an interdigitated phase with a lower order compared to the gel phase in the DPPC membrane supplemented with the IL.
Collapse
Affiliation(s)
- Ritika Gupta
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G. B. Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Veerendra K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Jyoti Gupta
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G. B. Nagar, Greater Noida, Uttar Pradesh 201314, India
| |
Collapse
|
14
|
Galluzzi M, Marfori L, Asperti S, De Vita A, Giannangeli M, Caselli A, Milani P, Podestà A. Interaction of imidazolium-based ionic liquids with supported phospholipid bilayers as model biomembranes. Phys Chem Chem Phys 2022; 24:27328-27342. [DOI: 10.1039/d2cp02866b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The cytotoxicity of ionic liquids (ILs) is receiving increasing attention due to their potential biological and environmental impact. We have used atomic force microscopy to investigate the interaction of ILs with supported phospholipid bilayers, as models of biomembranes.
Collapse
Affiliation(s)
- Massimiliano Galluzzi
- Materials Interfaces Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China
- C.I.Ma.I.Na and Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, 20133-Milano, Italy
| | - Lorenzo Marfori
- C.I.Ma.I.Na and Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, 20133-Milano, Italy
| | - Stefania Asperti
- C.I.Ma.I.Na and Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, 20133-Milano, Italy
| | - Alessandro De Vita
- C.I.Ma.I.Na and Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, 20133-Milano, Italy
| | - Matteo Giannangeli
- Dipartimento di Chimica and CNR-SCITEC, Università degli Studi di Milano, via Golgi 19, 20133-Milano, Italy
| | - Alessandro Caselli
- Dipartimento di Chimica and CNR-SCITEC, Università degli Studi di Milano, via Golgi 19, 20133-Milano, Italy
| | - Paolo Milani
- C.I.Ma.I.Na and Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, 20133-Milano, Italy
| | - Alessandro Podestà
- C.I.Ma.I.Na and Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano, via Celoria 16, 20133-Milano, Italy
| |
Collapse
|
15
|
Mandal P, Giri RP, Murphy BM, Ghosh SK. Self-Assembly of Graphene Oxide Nanoflakes in a Lipid Monolayer at the Air-Water Interface. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57023-57035. [PMID: 34817153 DOI: 10.1021/acsami.1c19004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The graphene family, especially graphene oxide (GO), has captured increasing prospects in the biomedical field due to its excellent physicochemical properties. Understanding the health and environmental impact of GO is of great importance for guiding future applications. Although their interactions with living organisms are omnipresent, the exact molecular mechanism is yet to be established. The cellular membrane is the first barrier for a foreign molecule to interact before entering into the cell. In the present study, a model system consisting of a lipid monolayer at the air-water interface represents one of the leaflets of this membrane. Surface pressure-area isotherms and advanced synchrotron X-ray scattering techniques have been employed to comprehend the interaction by varying the electrostatics of the membrane. The results depict a strong GO interaction with positively charged phospholipids, weak interaction with zwitterionic lipids, and interestingly negligible interaction with negatively charged lipids. GO flakes induce significant changes in the out-of-plane organization of a positively charged lipid monolayer with a minor influence on in-plane assembly of lipid chains. This interaction is packing-specific, and the influence of GO is much stronger at lower surface pressure. Even though for zwitterionic phospholipids, the GO flakes may partly insert into the lipid chains, the X-ray scattering results indicate that the flakes preferentially lie horizontally underneath the positively charged lipid monolayer. This in-depth structural description may pave new perspectives for the scientific community for the development of GO-based biosensors and biomedical materials.
Collapse
Affiliation(s)
- Priya Mandal
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| | - Rajendra P Giri
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
| | - Bridget M Murphy
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität Zu Kiel, 24098 Kiel, Germany
- Ruprecht Haensel Laboratory, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| |
Collapse
|
16
|
Hao XL, Guo HY, Cao B, Mo G, Li ZH, Yu ZW. The distinct effects of two imidazolium-based ionic liquids, [C 4mim][OAc] and [C 6mim][OAc], on the phase behaviours of DPPC. Phys Chem Chem Phys 2021; 23:17888-17893. [PMID: 34378570 DOI: 10.1039/d1cp01220g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Ionic liquids (ILs) are potential green solvents with very broad application prospects. Their toxicity and other biological effects are largely related to their hydrophobic properties. In this work, the effects of two imidazolium-based ILs with either a butyl or a hexyl chain, [C4mim][OAc] or [C6mim][OAc], on the phase behaviours of a representative phospholipid, dipalmitoylphosphatidylcholine (DPPC), were examined using synchrotron small- and wide-angle X-ray scattering and differential scanning calorimetry techniques. A series of samples with a lipid : IL molar ratio ranging from 1 : 0 to 1 : 4/1 : 5 were prepared as aqueous dispersions in the form of multi-lamellar vesicles. The two ILs were found to have distinct effects on the phase behaviours of DPPC. For [C4mim][OAc], its effect is very limited. In contrast, for [C6mim][OAc], it could eliminate the pre-transition of DPPC, markedly affect the main phase transition of the lipid, and insert into the DPPC bilayer at gel state to form an interdigitated gel phase. The findings increased our understanding on the biological effects of imidazolium-based ILs and might shed light on the design of novel IL-based antimicrobials.
Collapse
Affiliation(s)
- Xiao-Lei Hao
- MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | | | | | | | | | | |
Collapse
|
17
|
Jayaram AK, Pappa AM, Ghosh S, Manzer ZA, Traberg WC, Knowles TPJ, Daniel S, Owens RM. Biomembranes in bioelectronic sensing. Trends Biotechnol 2021; 40:107-123. [PMID: 34229865 DOI: 10.1016/j.tibtech.2021.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 12/14/2022]
Abstract
Cell membranes are integral to the functioning of the cell and are therefore key to drive fundamental understanding of biological processes for downstream applications. Here, we review the current state-of-the-art with respect to biomembrane systems and electronic substrates, with a view of how the field has evolved towards creating biomimetic conditions and improving detection sensitivity. Of particular interest are conducting polymers, a class of electroactive polymers, which have the potential to create the next step-change for bioelectronics devices. Lastly, we discuss the impact these types of devices could have for biomedical applications.
Collapse
Affiliation(s)
- A K Jayaram
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW, Cambridge, UK; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0JH, UK
| | - A M Pappa
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB30AS Cambridge, UK
| | - S Ghosh
- RF Smith School of Chemical and Biomolecular Engineering, Cornell University, Olin Hall, Ithaca, NY 14850, USA
| | - Z A Manzer
- RF Smith School of Chemical and Biomolecular Engineering, Cornell University, Olin Hall, Ithaca, NY 14850, USA
| | - W C Traberg
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB30AS Cambridge, UK
| | - T P J Knowles
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW, Cambridge, UK; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0JH, UK
| | - S Daniel
- RF Smith School of Chemical and Biomolecular Engineering, Cornell University, Olin Hall, Ithaca, NY 14850, USA
| | - R M Owens
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB30AS Cambridge, UK.
| |
Collapse
|
18
|
Kaur N, Kumar S, Shiksha, Gahlay GK, Mithu VS. Cytotoxicity and Membrane Permeability of Double-Chained 1,3-Dialkylimidazolium Cations in Ionic Liquids. J Phys Chem B 2021; 125:3613-3621. [PMID: 33818103 DOI: 10.1021/acs.jpcb.1c00592] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have evaluated ionic liquids based on double-chained 1-alkyl-3-octylimidazolium cations ([CnC8IM]+, n = 2, 4, 6, 8, 10, 12) for their cytotoxicity toward various cell lines. The toxicity of ionic liquids was correlated to their ability to partition into and permeabilize phosphocholine (POPC)- or phosphoglycerol (POPG)-based large unilamellar vesicles. Membrane partitioning of ionic liquids was assessed using the ζ-potential measurements, and membrane permeability was determined using fluorescence-based dye leakage assays. Both cytotoxicity and membrane permeability of these ILs were found to increase in a sigmoidal fashion with increasing chain length on the N1 atom (n in [CnC8IM]+) cations. These results were compared with those for ionic liquids based on single-chained 1-alkyl-3-methylimidazolium cations ([Cn+8C1IM]+), carrying a similar number of carbon atoms but as a single alkyl chain. Our studies show that ionic liquids containing double-chained cations are relatively less cytotoxic and membrane-permeabilizing than the cations bearing a single long alkyl chain.
Collapse
Affiliation(s)
- Navleen Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Sandeep Kumar
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Shiksha
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Gagandeep Kaur Gahlay
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Venus Singh Mithu
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India.,Department of NMR Based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| |
Collapse
|
19
|
Mitra S, Sharma VK, Mitra JB, Chowdhury S, Mukhopadhyay MK, Mukhopadhyay R, Ghosh SK. Thermodynamics and structure of model bio-membrane of liver lipids in presence of imidazolium-based ionic liquids. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2021; 1863:183589. [PMID: 33652006 DOI: 10.1016/j.bbamem.2021.183589] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 01/29/2021] [Accepted: 02/17/2021] [Indexed: 12/20/2022]
Abstract
Ionic liquids (ILs) are the attractions of researchers today due to their vast area of potential applications. For biomedical uses, it becomes essential to understand their interactions with cellular membrane. Here, the membrane is mimicked with lipid bilayer and monolayer composed of liver lipids extract. Three archetypal imidazolium based ILs, 1-decyl-3-methylimidazolium tetrafluoroborate ([DMIM][BF4] or [C10MIM][BF4]), 1-octyl-3-methylimidazolium tetrafluoroborate, ([OMIM][BF4] or [C8MIM][BF4]) and 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4] or [C2MIM][BF4]) having different alkyl chain lengths are used in the present study. The isothermal titration calorimetry (ITC) measurements showed that [DMIM][BF4] interacts strongest with the liver lipid membrane compared to other two ILs which have relatively shorter alkyl chain length. The low values of stoichiometry ratio of ILs indicates that ILs penetrate within the core of the lipid bilayer. The interaction of ILs with the liver lipid membrane is found to be mainly driven by entropy which could be due to the change in the structure of the lipid membrane at local or global scales. Dynamic light scattering (DLS) measurements indicate that there are no changes in the size of vesicles due to addition of [DMIM][BF4] indicating stability of the vesicles. On the other hand, x-ray reflectivity (XRR) measurements showed a concentration dependent change in the monolayer structure. At low concentration of the IL, the monolayer thickness decreases, exhibiting an increase in the electron density of the layer. However, at higher concentrations, the monolayer thickness increases proving a concentration dependent effects of the IL on the arrangement of the molecules.
Collapse
Affiliation(s)
- Saheli Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 92, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India
| | | | - Jyotsna Bhatt Mitra
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Subhadip Chowdhury
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
| | - Mrinmay Kumar Mukhopadhyay
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
| | | | - Sajal Kumar Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 92, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India.
| |
Collapse
|
20
|
Gupta R, Singh A, Srihari V, Ghosh SK. Ionic Liquid-Induced Phase-Separated Domains in Lipid Multilayers Probed by X-ray Scattering Studies. ACS OMEGA 2021; 6:4977-4987. [PMID: 33644605 PMCID: PMC7905935 DOI: 10.1021/acsomega.0c06014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 01/28/2021] [Indexed: 05/16/2023]
Abstract
A cellular membrane, primarily a lipid bilayer, surrounds the internal components of a biological cell from the external components. This self-assembled bilayer is known to be perturbed by ionic liquids (ILs) causing malfunctioning of a cellular organism. In the present study, surface-sensitive X-ray scattering techniques have been employed to understand this structural perturbation in a lipid multilayer system formed by a zwitterionic phospholipid, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine. The ammonium and phosphonium-based ILs with methanesulfonate anions are observed to induce phase-separated domains in the plane of a bilayer. The lamellar X-ray diffraction peaks suggest these domains to correlate across the bilayers in a smectic liquid crystalline phase. This induced IL-rich lamellar phase has a very low lamellar repeat distance, suggesting the formation of an interdigitated bilayer. The IL-poor phase closely related to the pristine lipid phase shows a decrement in the in-plane chain lattice parameters with a reduced tilt angle. The ammonium and phosphonium-based ILs with a relatively bulky anion, p-toluenemethanesulfonate, have shown a similar effect.
Collapse
Affiliation(s)
- Ritika Gupta
- Department
of Physics, School of Natural Sciences, Shiv Nadar University, NH 92, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India
| | - Arnab Singh
- Surface
Physics and Material Science Division, Saha
Institute of Nuclear Physics, AF Block, Bidhannagar, Kolkata 700064, India
| | - Velaga Srihari
- High
Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sajal K. Ghosh
- Department
of Physics, School of Natural Sciences, Shiv Nadar University, NH 92, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India
| |
Collapse
|
21
|
Role of cationic head-group in cytotoxicity of ionic liquids: Probing changes in bilayer architecture using solid-state NMR spectroscopy. J Colloid Interface Sci 2021; 581:954-963. [DOI: 10.1016/j.jcis.2020.08.115] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/23/2020] [Accepted: 08/28/2020] [Indexed: 01/30/2023]
|
22
|
Sharma VK, Ghosh SK, García Sakai V, Mukhopadhyay R. Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid. Front Chem 2020; 8:577508. [PMID: 33330366 PMCID: PMC7710540 DOI: 10.3389/fchem.2020.577508] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/01/2020] [Indexed: 12/19/2022] Open
Abstract
Ionic liquids (ILs) are an important class of emerging compounds, owing to their widespread industrial applications in high-performance lubricants for food and cellulose processing, despite their toxicity to living organisms. It is believed that this toxicity is related to their actions on the cellular membrane. Hence, it is vital to understand the interaction of ILs with cell membranes. Here, we report on the effects of an imidazolium-based IL, 1-decyl-3-methylimidazolium tetrafluoroborate (DMIM[BF4]), on the microscopic dynamics of a membrane formed by liver extract lipid, using quasielastic neutron scattering (QENS). The presence of significant quasielastic broadening indicates that stochastic molecular motions of the lipids are active in the system. Two distinct molecular motions, (i) lateral motion of the lipid within the membrane leaflet and (ii) localized internal motions of the lipid, are found to contribute to the QENS broadening. While the lateral motion could be described assuming continuous diffusion, the internal motion is explained on the basis of localized translational diffusion. Incorporation of the IL into the liver lipid membrane is found to enhance the membrane dynamics by accelerating both lateral and internal motions of the lipids. This indicates that the IL induces disorder in the membrane and enhances the fluidity of lipids. This could be explained on the basis of its location in the lipid membrane. Results are compared with various other additives and we provide an indication of a possible correlation between the effects of guest molecules on the dynamics of the membrane and its location within the membrane.
Collapse
Affiliation(s)
- Veerendra K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, India.,Homi Bhabha National Institute, Mumbai, India
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, Greater Noida, India
| | - Victoria García Sakai
- Rutherford Appleton Laboratory, ISIS Pulsed Neutron and Muon Facility, Science and Technology Facilities Council, Didcot, United Kingdom
| | - R Mukhopadhyay
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, India.,Homi Bhabha National Institute, Mumbai, India
| |
Collapse
|
23
|
Kumari P, Pillai VVS, Benedetto A. Mechanisms of action of ionic liquids on living cells: the state of the art. Biophys Rev 2020; 12:1187-1215. [PMID: 32936423 PMCID: PMC7575683 DOI: 10.1007/s12551-020-00754-w] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/03/2020] [Indexed: 12/13/2022] Open
Abstract
Ionic liquids (ILs) are a relatively new class of organic electrolytes composed of an organic cation and either an organic or inorganic anion, whose melting temperature falls around room-temperature. In the last 20 years, the toxicity of ILs towards cells and micro-organisms has been heavily investigated with the main aim to assess the risks associated with their potential use in (industrial) applications, and to develop strategies to design greener ILs. Toxicity, however, is synonym with affinity, and this has stimulated, in turn, a series of biophysical and chemical-physical investigations as well as few biochemical studies focused on the mechanisms of action (MoAs) of ILs, key step in the development of applications in bio-nanomedicine and bio-nanotechnology. This review has the intent to present an overview of the state of the art of the MoAs of ILs, which have been the focus of a limited number of studies but still sufficient enough to provide a first glimpse on the subject. The overall picture that emerges is quite intriguing and shows that ILs interact with cells in a variety of different mechanisms, including alteration of lipid distribution and cell membrane viscoelasticity, disruption of cell and nuclear membranes, mitochondrial permeabilization and dysfunction, generation of reactive oxygen species, chloroplast damage (in plants), alteration of transmembrane and cytoplasmatic proteins/enzyme functions, alteration of signaling pathways, and DNA fragmentation. Together with our earlier review work on the biophysics and chemical-physics of IL-cell membrane interactions (Biophys. Rev. 9:309, 2017), we hope that the present review, focused instead on the biochemical aspects, will stimulate a series of new investigations and discoveries in the still new and interdisciplinary field of "ILs, biomolecules, and cells."
Collapse
Affiliation(s)
- Pallavi Kumari
- Department of Sciences, University of Roma Tre, 00146, Rome, Italy
- School of Physics, University College Dublin, Dublin 4, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
| | - Visakh V S Pillai
- Department of Sciences, University of Roma Tre, 00146, Rome, Italy
- School of Physics, University College Dublin, Dublin 4, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
| | - Antonio Benedetto
- Department of Sciences, University of Roma Tre, 00146, Rome, Italy.
- School of Physics, University College Dublin, Dublin 4, Ireland.
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland.
- Laboratory for Neutron Scattering, Paul Scherrer Institute, 5232, Villigen, Switzerland.
| |
Collapse
|
24
|
Choudhary M, Kamil SM. Phase Diagram Study of Sodium Dodecyl Sulfate Using Dissipative Particle Dynamics. ACS OMEGA 2020; 5:22891-22900. [PMID: 32954138 PMCID: PMC7495727 DOI: 10.1021/acsomega.0c02255] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/19/2020] [Indexed: 05/20/2023]
Abstract
Dissipative particle dynamics (DPD) simulations are performed to study the phase transition of sodium dodecyl sulfate (SDS) in aqueous solution, which is an anionic surfactant commonly known as sodium dodecyl sulfate. In this work, the aim is to find a coarse-grained minimal model suitable to produce the full phase diagram of SDS. We examine the coarse-grained models of SDS, which have been used in earlier computational studies to produce the phases as well as for finding the critical micelle concentration (CMC) of SDS. We contrast the results based on these models with the experimental observations to assess their accuracy. Our research also takes into account the importance of sodium ions, which come from the partial dissociation of SDS, when dissolved in water. The effect of sodium ion has not been considered explicitly in the computational work done so far using dissipative particle dynamics. In light of the above explorations, we propose new models for SDS and demonstrate that they successfully produce a compendious SDS phase diagram, which can precisely overlay the experimental results.
Collapse
|
25
|
Eftaiha AF, Qaroush AK, Kayed GG, Abdel Rahman ARK, Assaf KI, Paige MF. Morphological and Interaction Characteristics of Surface-Active Ionic Liquids and Palmitic Acid in Mixed Monolayers. Chemphyschem 2020; 21:1858-1865. [PMID: 32598077 DOI: 10.1002/cphc.202000359] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 06/28/2020] [Indexed: 11/08/2022]
Abstract
A series of water soluble, surface-active ionic liquids (SAILs), namely, 1-alkyl-3-methyl imidazolium chlorides ([Cn -mim]Cl) and their mixtures with palmitic acid (PA) are investigated in Langmuir monolayers and Langmuir-Blodgett films. It is inferred from the surface pressure-area isotherms that C16 -mim-IL mixes non-ideally with PA and stabilizes the binary mixed films. In addition, the residence of mim-IL at the water surface is enhanced as a function of the increasing alkyl side chain length. Generally, the compressional moduli values decrease upon increasing the content of the mim-ILs over a wide range of compositions. Furthermore, film relaxation measurements indicate that the IL component is selectively excluded from the mixed films upon achieving a certain target pressure. Brewster angle microscope images demonstrate minimal changes on the PA domains in the presence of either C4 - and C8 -mim-ILs, whereas presence of the hexadecyl counterpart results in the formation of condensed sheets. Atomic force microscopy imaging of deposited films show the formation of propeller-like aggregates when C8 - or C16 -mim-IL is present in the mixed films.
Collapse
Affiliation(s)
- A F Eftaiha
- Department of Chemistry, The Hashemite University, P.O. Box, 150459, Zarqa 13115, Jordan
| | - Abdussalam K Qaroush
- Department of Chemistry, Faculty of Science, The University of Jordan, Amman, 11942, Jordan
| | - Ghada G Kayed
- Department of Chemistry, Faculty of Science, The University of Jordan, Amman, 11942, Jordan
| | | | - Khaleel I Assaf
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, Al-Salt, 19117, Jordan
| | - Matthew F Paige
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, S7N 5C9, Canada
| |
Collapse
|
26
|
Stoev K, Sakurai K. Recent Progresses in Nanometer Scale Analysis of Buried Layers and Interfaces in Thin Films by X-rays and Neutrons. ANAL SCI 2020; 36:901-922. [PMID: 32147630 DOI: 10.2116/analsci.19r010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In the early 1960s, scientists achieved the breakthroughs in the fields of solid surfaces and artificial layered structures. The advancement of surface science has been supported by the advent of ultra-high vacuum technologies, newly discovered and established scanning probe microscopy with atomic resolution, as well as some other advanced surface-sensitive spectroscopy and microscopy. On the other hand, it has been well recognized that a number of functions are related to the structures of the interfaces, which are the thin planes connecting different materials, most likely by layering thin films. Despite the scientific significance, so far, research on such buried layers and interfaces has been limited, because the probing depth of almost all existing sophisticated analytical methods is limited to the top surface. The present article describes the recent progress in the nanometer scale analysis of buried layers and interfaces, particularly by using X-rays and neutrons. The methods are essentially promising to non-destructively probe such buried structures in thin films. The latest scientific research has been reviewed, and includes applications to bio-chemical, organic, electronic, magnetic, spintronic, self-organizing and complicated systems as well as buried liquid-liquid and solid-liquid interfaces. Some emerging analytical techniques and instruments, which provide new attractive features such as imaging and real time analysis, are also discussed.
Collapse
|
27
|
Zheng W, Huang W, Song Z, Tang Z, Sun W. Insight into the structure-antibacterial activity of amino cation-based and acetate anion-based ionic liquids from computational interactions with the POPC phospholipid bilayer. Phys Chem Chem Phys 2020; 22:15573-15581. [PMID: 32613219 DOI: 10.1039/d0cp02353a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Investigations relevant to ionic liquids (ILs) as antibacterial agents have drawn considerable attention. However, the high cost and potential toxicity of ILs have severely limited their extensive applications, which has motivated researchers to design inexpensive and health-benign ILs. In this work, the interactions between the hydrated zwitterionic phospholipid (POPC) bilayer and a series of hypothetical amino cation-based and acetate anion-based ILs with different counterparts were investigated using molecular dynamics (MD) simulations to predict their antibacterial abilities. The cations of the ILs were found to insert into the lipid bilayer spontaneously, especially amino cations. Reorientation of the inserted imidazolium-based cations was observed, while the inserted amino cations showed no obvious reorientation phenomena, probably because of the strong charge interactions between the positive NH3 groups of the amino cation and the negative PO4 groups of the lipid bilayer. Due to their strong affinity with water, acetate-based anions disperse better in water solution, which weakens the insertion of the cations into the lipid bilayer to some extent. The structure and dynamic properties of the lipid bilayer, such as electrostatic potential, local ordering, area per lipid, volume per lipid, bilayer thickness, and lateral diffusion, are significantly influenced by the insertion of the cations, which results in disorder of the lipid bilayer and further disruption of the activity of the cell membrane. The insights into the relationship between the structures of ILs and their antibacterial activity in this work will provide a good reference for the screening and design of less expensive, safer, and greener IL candidates as antibacterial agents.
Collapse
Affiliation(s)
- Weizhong Zheng
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | | | | | | | | |
Collapse
|
28
|
Wlodek M, Slastanova A, Fox LJ, Taylor N, Bikondoa O, Szuwarzynski M, Kolasinska-Sojka M, Warszynski P, Briscoe WH. Structural evolution of supported lipid bilayers intercalated with quantum dots. J Colloid Interface Sci 2020; 562:409-417. [PMID: 31806357 DOI: 10.1016/j.jcis.2019.11.102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/23/2019] [Accepted: 11/25/2019] [Indexed: 10/25/2022]
Abstract
HYPOTHESIS Supported lipid bilayers (SLBs) embedded with hydrophobic quantum dots (QDs) undergo temporal structural rearrangement. EXPERIMENTS Synchrotron X-ray reflectivity (XRR) was applied to monitor the temporal structural changes over a period of 24 h of mixed SLBs of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) / 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-ethanolamine (POPE) intercalated with 4.9 nm hydrophobic cadmium sulphide quantum dots (CdS QDs). The QD-embedded SLBs (QD-SLBs) were formed via rupture of the mixed liposomes on a positively charged polyethylene imine (PEI) monolayer. Atomic force microscopy (AFM) imaging provided complementary characterization of the bilayer morphology. FINDINGS Our results show time-dependent perturbations in the SLB structure due to the interaction upon QD incorporation. Compared to the SLB without QDs, at 3 h incubation time, there was a measurable decrease in the bilayer thickness and a concurrent increase in the scattering length density (SLD) of the QD-SLB. The QD-SLB then became progressively thicker with increasing incubation time, which - along with the fitted SLD profile - was attributed to the structural rearrangement due to the QDs being expelled from the inner leaflet to the outer leaflet of the bilayer. Our results give unprecedented mechanistic insights into the structural evolution of QD-SLBs on a polymer cushion, important to their potential biomedical and biosensing applications.
Collapse
Affiliation(s)
- Magdalena Wlodek
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland.
| | - Anna Slastanova
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Laura J Fox
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Nicholas Taylor
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Oier Bikondoa
- XMaS, The UK-CRG Beamline, The European Synchrotron (ESRF), 71 Avenue des Martyrs, 38043 Grenoble, France; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Michal Szuwarzynski
- AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, al. A. Mickiewicza 30, PL-30059 Krakow, Poland
| | - Marta Kolasinska-Sojka
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland
| | - Piotr Warszynski
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL-30239 Krakow, Poland
| | - Wuge H Briscoe
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom.
| |
Collapse
|
29
|
Bakshi K, Mitra S, Sharma VK, Jayadev MSK, Sakai VG, Mukhopadhyay R, Gupta A, Ghosh SK. Imidazolium-based ionic liquids cause mammalian cell death due to modulated structures and dynamics of cellular membrane. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183103. [DOI: 10.1016/j.bbamem.2019.183103] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/25/2019] [Accepted: 10/10/2019] [Indexed: 12/20/2022]
|
30
|
Singh A, Bains D, Hassen WM, Singh N, Dubowski JJ. Formation of a Au/Au 9Ga 4 Alloy Nanoshell on a Bacterial Surface through Galvanic Displacement Reaction for High-Contrast Imaging. ACS APPLIED BIO MATERIALS 2020; 3:477-485. [DOI: 10.1021/acsabm.9b00932] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amanpreet Singh
- Laboratory for Quantum Semiconductors and Photon-Based BioNanotechnology, Interdisciplinary Institute for Technological Innovation (3IT), CNRS UMI-3463, Department of Electrical and Computer Engineering, Université de Sherbrooke, 3000 boul. de l’Université, Sherbrooke, Québec J1K 0A5, Canada
| | - Deepak Bains
- Department of Chemistry, Indian Institute of Technology Ropar, Punjab 140001, India
| | - Walid M. Hassen
- Laboratory for Quantum Semiconductors and Photon-Based BioNanotechnology, Interdisciplinary Institute for Technological Innovation (3IT), CNRS UMI-3463, Department of Electrical and Computer Engineering, Université de Sherbrooke, 3000 boul. de l’Université, Sherbrooke, Québec J1K 0A5, Canada
| | - Narinder Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Punjab 140001, India
| | - Jan J. Dubowski
- Laboratory for Quantum Semiconductors and Photon-Based BioNanotechnology, Interdisciplinary Institute for Technological Innovation (3IT), CNRS UMI-3463, Department of Electrical and Computer Engineering, Université de Sherbrooke, 3000 boul. de l’Université, Sherbrooke, Québec J1K 0A5, Canada
| |
Collapse
|
31
|
Mitra S, Das R, Singh A, Mukhopadhyay MK, Roy G, Ghosh SK. Surface Activities of a Lipid Analogue Room-Temperature Ionic Liquid and Its Effects on Phospholipid Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:328-339. [PMID: 31826620 DOI: 10.1021/acs.langmuir.9b02716] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
There are great efforts of synthesizing imidazolium-based ionic liquids (ILs) for developing new antibiotics as these molecules have shown strong antibacterial activities. Compared to a single-hydrocarbon-chained IL, the lipid analogues (LAs) with two chains are more effective. In the present study, the LA molecule MeIm(COOH)Me(Oleylamine)Iodide has been synthesized and its surface activities along with the effectiveness in restructuring of a model cellular membrane have been quantified. The molecule is found to be highly surface active as estimated from the area-pressure isotherm of a monolayer of the molecules formed at the air-water interface. The X-ray reflectivity (XRR) studies of a monolayer dip-coated on a hydrophilic substrate have shown the structural properties of the layer which resembles to those of unsaturated phospholipids. The LA molecules are observed to fluidize a phospholipid bilayer formed by the saturated lipid 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). At a lower surface pressure, the lipid monolayer of DPPC has exhibited a thickening effect at a low concentration of added LA and a thinning effect at higher concentration. However, at a high surface pressure of the monolayer, the thickness is found to decrease monotonically. The in-plane pressure-dependent interaction of LA molecules with model cellular membrane and the corresponding perturbation in the structure and physical properties of the membrane may be linked to the strong lysing effect of these types of molecules.
Collapse
Affiliation(s)
| | | | - A Singh
- Surface Physics and Material Science Division , Saha Institute of Nuclear Physics , AF Block, Bidhannagar , Kolkata 700064 , India
| | - M K Mukhopadhyay
- Surface Physics and Material Science Division , Saha Institute of Nuclear Physics , AF Block, Bidhannagar , Kolkata 700064 , India
| | | | | |
Collapse
|
32
|
Susceptibility of biomembrane structure towards amphiphiles, ionic liquids, and deep eutectic solvents. ADVANCES IN BIOMEMBRANES AND LIPID SELF-ASSEMBLY 2020. [DOI: 10.1016/bs.abl.2020.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
33
|
Kumar S, Scheidt HA, Kaur N, Kang TS, Gahlay GK, Huster D, Mithu VS. Effect of the Alkyl Chain Length of Amphiphilic Ionic Liquids on the Structure and Dynamics of Model Lipid Membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12215-12223. [PMID: 31424219 DOI: 10.1021/acs.langmuir.9b02128] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We compare the biophysical and structural aspects of the interaction of amphiphilic ionic liquids containing 1-alkyl-3-methylimidazolium cation ([CnMIM]+, n = 8, 12, or 16) with membranes composed of zwitterionic 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) or anionic 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-rac-glycerol (POPG). Liposome affinity and permeabilization were determined using ζ-potential and fluorescence studies, correlated with the cytoxicity of [CnMIM]+Br- toward HeLa cell lines. Membrane affinity is strongest in the case of [C16MIM]+Br- followed by [C12MIM]+Br- and [C8MIM]+Br- for both membranes, and trends remained the same in the case of membrane permeability and cytotoxicity. Solid-state NMR spectroscopy was used to localize [CnMIM]+ inside the lipid bilayers and to study their impact on the head group and acyl chain structures and dynamics of the lipid molecules. The charged ring moiety of the [CnMIM]+ is localized in the lipid-water interface of the membranes irrespective of the chain length and membrane surface charge. While [C8MIM]+ binds the membrane most weakly, it induces the largest disorder in the lipid chain region. A lack of fast flip-flop motions of the amphiphiles in the case of long chain [C16MIM]+ is suggested to render the membrane unstable, which increases its permeability. Between the lipid molecules, the POPC membrane incurs larger disorder in lipid chain packing upon insertion of [CnMIM]+ molecules. The study provides structural details of the impact of increasing chain lengths in [CnMIM]+ on the structural properties of lipid bilayers.
Collapse
Affiliation(s)
| | - Holger A Scheidt
- Institut für Medizinische Physik und Biophysik , Leipzig University , Leipzig 04109 , Germany
| | | | | | | | - Daniel Huster
- Institut für Medizinische Physik und Biophysik , Leipzig University , Leipzig 04109 , Germany
| | | |
Collapse
|
34
|
Correlating Lipid Membrane Permeabilities of Imidazolium Ionic Liquids with their Cytotoxicities on Yeast, Bacterial, and Mammalian Cells. Biomolecules 2019; 9:biom9060251. [PMID: 31242711 PMCID: PMC6627299 DOI: 10.3390/biom9060251] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 02/06/2023] Open
Abstract
Alkyl-imidazolium chloride ionic liquids (ILs) have been broadly studied for biochemical and biomedical technologies. They can permeabilize lipid bilayer membranes and have cytotoxic effects, which makes them targets for drug delivery biomaterials. We assessed the lipid-membrane permeabilities of ILs with increasing alkyl chain lengths from ethyl to octyl groups on large unilamellar vesicles using a trapped-fluorophore fluorescence lifetime-based leakage experiment. Only the most hydrophobic IL, with the octyl chain, permeabilizes vesicles, and the concentration required for permeabilization corresponds to its critical micelle concentration. To correlate the model vesicle studies with biological cells, we quantified the IL permeabilities and cytotoxicities on different cell lines including bacterial, yeast, and ovine blood cells. The IL permeabilities on vesicles strongly correlate with permeabilities and minimum inhibitory concentrations on biological cells. Despite exhibiting a broad range of lipid compositions, the ILs appear to have similar effects on the vesicles and cell membranes.
Collapse
|
35
|
Li X, Ma M, Xin X, Tang Y, Zhao G, Xiao X. Efficient acylation of gastrodin byAspergillus oryzaewhole-cells in non-aqueous media. RSC Adv 2019; 9:16701-16712. [PMID: 35516375 PMCID: PMC9064431 DOI: 10.1039/c9ra01605h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 05/20/2019] [Indexed: 11/21/2022] Open
Abstract
Gastrodin, a bioactive compound extracted from the plant source ofGastrodia elataBlume, has a wide range of therapeutic effects on central nervous system (CNS) diseases, but suffers from poor brain permeability and short half-life in plasma.
Collapse
Affiliation(s)
- Xiaofeng Li
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- China 510641
- State Key Laboratory of Pulp and Paper Engineering
| | - Maohua Ma
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- China 510641
| | - Xuan Xin
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- China 510641
| | - Yuqian Tang
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- China 510641
| | - Guanglei Zhao
- State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Xinglong Xiao
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- China 510641
| |
Collapse
|
36
|
Egorova KS, Ananikov VP. Fundamental importance of ionic interactions in the liquid phase: A review of recent studies of ionic liquids in biomedical and pharmaceutical applications. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.025] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
37
|
Mitra S, Ray D, Bhattacharya G, Gupta R, Sen D, Aswal VK, Ghosh SK. Probing the effect of a room temperature ionic liquid on phospholipid membranes in multilamellar vesicles. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2018; 48:119-129. [DOI: 10.1007/s00249-018-1339-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/16/2018] [Accepted: 11/19/2018] [Indexed: 01/12/2023]
|
38
|
Galluzzi M, Schulte C, Milani P, Podestà A. Imidazolium-Based Ionic Liquids Affect Morphology and Rigidity of Living Cells: An Atomic Force Microscopy Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12452-12462. [PMID: 30213187 DOI: 10.1021/acs.langmuir.8b01554] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The study of the toxicity, biocompatibility, and environmental sustainability of room-temperature ionic liquids (ILs) is still in its infancy. Understanding the impact of ILs on living organisms, especially from the aquatic ecosystem, is urgent, since large amounts of these substances are starting to be employed as solvents in industrial chemical processes, and on the other side, evidence of toxic effects of ILs on microorganisms and single cells have been observed. To date, the toxicity of ILs has been investigated by means of macroscopic assays aimed at characterizing the effective concentrations (like the EC50) that cause the death of a significant fraction of the population of microorganisms and cells. These studies allow us to identify the cell membrane as the first target of the IL interaction, whose effectiveness was correlated to the lipophilicity of the cation, i.e., to the length of the lateral alkyl chain. Our study aimed at investigating the molecular mechanisms underpinning the interaction of ILs with living cells. To this purpose, we carried out a combined topographic and mechanical analysis by atomic force microscopy of living breast metastatic cancer cells (MDA-MB-231) upon interaction with imidazolium-based ILs. We showed that ILs are able to induce modifications of the overall rigidity (effective Young's modulus) and morphology of the cells. Our results demonstrate that ILs act on the physical properties of the outer cell layer (the membrane linked to the actin cytoskeleton), already at concentrations below the EC50. These potentially toxic effects are stronger at higher IL concentrations, as well as with longer lateral chains in the cation.
Collapse
Affiliation(s)
- Massimiliano Galluzzi
- Shenzhen Key Laboratory of Nanobiomechanics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055 , Guangdong , China
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Carsten Schulte
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Paolo Milani
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| | - Alessandro Podestà
- C.I.Ma.I.Na and Dipartimento di Fisica "Aldo Pontremoli" , Università degli Studi di Milano , via Celoria 16 , 20133 Milano , Italy
| |
Collapse
|
39
|
Benedetto A, Ballone P. Room-Temperature Ionic Liquids and Biomembranes: Setting the Stage for Applications in Pharmacology, Biomedicine, and Bionanotechnology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9579-9597. [PMID: 29510045 DOI: 10.1021/acs.langmuir.7b04361] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Empirical evidence and conceptual elaboration reveal and rationalize the remarkable affinity of organic ionic liquids for biomembranes. Cations of the so-called room-temperature ionic liquids (RTILs), in particular, are readily absorbed into the lipid fraction of biomembranes, causing a variety of observable biological effects, including generic cytotoxicity, broad antibacterial potential, and anticancer activity. Chemical physics analysis of model systems made of phospholipid bilayers, RTIL ions, and water confirm and partially explain this evidence, quantifying the mild destabilizing effect of RTILs on the structural, dynamic, and thermodynamic properties of lipids in biomembranes. Our Feature Article presents a brief introduction to these systems and to their roles in biophysics and biotechnology, summarizing recent experimental and computational results on their properties. More importantly, it highlights the many developments in pharmacology, biomedicine, and bionanotechnology expected from the current research effort on this topic. To anticipate future developments, we speculate on (i) potential applications of (magnetic) RTILs to affect and control the rheology of cells and biological tissues, of great relevance for diagnostics and (ii) the use of RTILs to improve the durability, reliability, and output of biomimetic photovoltaic devices.
Collapse
Affiliation(s)
- Antonio Benedetto
- Laboratory for Neutron Scattering , Paul Scherrer Institute , Villigen 5232 , Switzerland
- Conway Institute of Biomolecular and Biomedical Research , University College Dublin , Dublin 4 , Ireland
| | - Pietro Ballone
- Italian Institute of Technology , Via Morego 30 , 16163 Genova , Italy
| |
Collapse
|
40
|
Bhattacharya G, Giri RP, Dubey A, Mitra S, Priyadarshini R, Gupta A, Mukhopadhyay MK, Ghosh SK. Structural changes in cellular membranes induced by ionic liquids: From model to bacterial membranes. Chem Phys Lipids 2018; 215:1-10. [PMID: 29944866 DOI: 10.1016/j.chemphyslip.2018.06.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/16/2018] [Accepted: 06/18/2018] [Indexed: 12/19/2022]
Abstract
Ionic liquids (ILs) have generated considerable attention recently because of their cytotoxicity and application as antibiotics. However, the mechanism of how they damage cell membranes is not currently well understood. In this paper, the antibacterial activities of two imidazolium-based ILs, namely 1-butyl- 3-methylimidazolium tetrafluroborate ([BMIM][BF4]) and 1-ethyl- 3-methylimidazolium tetrafluroborate ([EMIM][BF4]) have been investigated. The activity of [BMIM][BF4] on gram negative bacteria E. coli is observed to be stronger compared with the short chained [EMIM][BF4]. To explain this observation, the effects of these ILs on the self-assembled structures of model cellular membranes have been investigated. The in-plane elasticity of a monolayer formed at air-water interface by 1,2-dipalmitoyl- sn-glycero- 3-phosphocholine (DPPC) lipids was reduced in the presence of the ILs. The x-ray reflectivity studies on polymer supported lipid bilayer have shown the bilayer to shrink and correspondingly exhibit an increase in electron density. The presence of a certain mol% of negatively charged lipid, 1,2-dipalmitoyl-rac-glycero-3-phospho-L-serine (DPPS), in DPPC mono- and bi-layers enhances the effect considerably.
Collapse
Affiliation(s)
- G Bhattacharya
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - R P Giri
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, Bidhannagar, Kolkata, 700064, India
| | - A Dubey
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - S Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - R Priyadarshini
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - A Gupta
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - M K Mukhopadhyay
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, Bidhannagar, Kolkata, 700064, India
| | - S K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India.
| |
Collapse
|
41
|
Kumar S, Scheidt HA, Kaur N, Kaur A, Kang TS, Huster D, Mithu VS. Amphiphilic Ionic Liquid-Induced Membrane Permeabilization: Binding Is Not Enough. J Phys Chem B 2018; 122:6763-6770. [DOI: 10.1021/acs.jpcb.8b03733] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Holger A. Scheidt
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig 04109, Germany
| | - Navleen Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Anupreet Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Tejwant S. Kang
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Daniel Huster
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig 04109, Germany
| | - Venus S. Mithu
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| |
Collapse
|
42
|
Ibsen KN, Ma H, Banerjee A, Tanner EEL, Nangia S, Mitragotri S. Mechanism of Antibacterial Activity of Choline-Based Ionic Liquids (CAGE). ACS Biomater Sci Eng 2018; 4:2370-2379. [PMID: 33435102 DOI: 10.1021/acsbiomaterials.8b00486] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The continued emergence of antibiotic-resistant organisms has severely depleted our arsenal of effective antimicrobials. Ionic liquids (ILs) show great promise as antibacterial agents but understanding the mechanism of attack on bacterial cells is key to ensuring that design of IL-based biocides impart maximum efficacy with minimal toxicity, while also avoiding the potential for the target organisms to become resistant. Here we report the antibacterial attributes of a set of choline and geranate (CAGE)-based ILs and identify the mechanism by which they interact with the Gram-negative cell wall of Escherichia coli. CAGE is envisaged as an antimicrobial agent to treat topical infections in skin. Our earlier work has shown that CAGE is highly effective across a breadth of bacterial, fungal, and viral species and is benign to human cells. This combination makes CAGE an ideal antimicrobial for human use. Four CAGE variants with varying ratios of choline and geranic acid were synthesized and tested for their antibacterial activity (1:4, 1:2, 1:1, and 2:1 choline:geranic acid). The minimum bactericidal concentration required to kill E. coli correlated with the geranic acid content. Using molecular dynamics (MD) simulations, we identified the mechanism of CAGE action on the E. coli membrane, namely that choline is attracted to the negatively charged cell membrane and consequently inserts geranic acid into the lipid bilayer. The disruption of the cell membrane was confirmed with propidium iodide staining via flow cytometry and scanning electron microscopy. Fourier Transform infrared spectroscopic analysis of treated cells showed an altered lipid profile similar to phase transition, indicating the disruption of the lipid bilayer conformation. E. coli cells repeatedly exposed to CAGE did not exhibit resistance. This study provides the fundamental mechanism of the action of choline-based ILs on Gram-negative bacteria and demonstrates the promise of CAGE as a powerful antimicrobial agent to treat infections.
Collapse
Affiliation(s)
- Kelly N Ibsen
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States.,School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Huilin Ma
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Amrita Banerjee
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Eden E L Tanner
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Shikha Nangia
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
| | - Samir Mitragotri
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
43
|
Wan R, Xia X, Wang P, Huo W, Dong H, Chang Z. Toxicity of imidazoles ionic liquid [C 16mim]Cl to HepG2 cells. Toxicol In Vitro 2018; 52:1-7. [PMID: 29842889 DOI: 10.1016/j.tiv.2018.05.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 05/23/2018] [Accepted: 05/24/2018] [Indexed: 01/09/2023]
Abstract
Ionic liquids have garnered increasing attention due to their capacity for low vapor pressure, lack of flammability, designability, good stability, and as a asubstitute for conventional organic solvents. However, their toxicity to various organisms has caused growing concern in recent years. Our study aims to evaluate the toxicity of 1-hexadecyl-3-methylimidazolium chloride ([C16min]Cl) to human hepatocellular carcinoma (HepG2) cells, including cell viability, genotoxicity, oxidative stress, apoptosis, cell cycle, and apoptosis-related gene expression. Our results with HepG2 cells suggested that [C16min]Cl inhibited cellular growth, decreased cell viability, induced DNA damage and apoptosis, inhibited superoxide dismutase, decreased glutathione content, increased cellular malondialdehyde levels as well as altering the cell cycle. Moreover, the induction of [C16min]Cl altered the transcription of p53, Bax and Bcl-2, which are critical for controlling cell cycles progression and death, which suggests its involvement with cytotoxicity and apoptosis induced by [C16min]Cl in HepG2 cells. Taken together, these results revealed that [C16min]Cl exerted genotoxicity, oxidative stress and induced apoptosis in HepG2 cells; hence, it is not a healthy solvent.
Collapse
Affiliation(s)
- Ruyan Wan
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Xiaohua Xia
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China.
| | - Peijin Wang
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Weiran Huo
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Hui Dong
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| | - Zhongjie Chang
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
| |
Collapse
|
44
|
Sharma VK, Mukhopadhyay R. Deciphering interactions of ionic liquids with biomembrane. Biophys Rev 2018; 10:721-734. [PMID: 29549587 DOI: 10.1007/s12551-018-0410-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 02/27/2018] [Indexed: 12/24/2022] Open
Abstract
Ionic liquids (ILs) are a special class of low-temperature (typically < 100 °C) molten salts, which have huge upsurge interest in the field of chemical synthesis, catalysis, electrochemistry, pharmacology, and biotechnology, mainly due to their highly tunable nature and exceptional properties. However, practical uses of ILs are restricted mainly due to their adverse actions on organisms. Understanding interactions of ILs with biomembrane is prerequisite to assimilate the actions of these ionic compounds on the organism. Here, we review different biophysical methods to characterize interactions between ILs and phospholipid membrane, a model biomembrane. All these studies indicate that ILs interact profoundly with the lipid bilayer and modulate the structure, microscopic dynamics, and phase behavior of the membrane, which could be the fundamental cause of the observed toxicity of ILs. Effects of ILs on the membrane are found to be strongly dependent on the lipophilicity of the IL and are found to increase with the alkyl chain length of IL. This can be correlated with the observed higher toxicity of IL with the longer alkyl chain length. These informations would be useful to tune the toxicity of IL which is required in designing environment-friendly nontoxic solvents of the so-called green chemistry for various practical applications.
Collapse
Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - R Mukhopadhyay
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| |
Collapse
|
45
|
Ionic Liquids Treated within the Grand Canonical Adaptive Resolution Molecular Dynamics Technique. COMPUTATION 2018. [DOI: 10.3390/computation6010023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We use the Grand Canonical Adaptive Resolution Molecular Dynamics Technique (GC-AdResS) to examine the essential degrees of freedom necessary for reproducing the structural properties of the imidazolium class of ionic liquids. In this technique, the atomistic details are treated as an open sub-region of the system while the surrounding environment is modelled as a generic coarse-grained model. We systematically characterize the spatial quantities such as intramolecular, intermolecular radial distribution functions, other structural and orientational properties of ILs. The spatial quantities computed in an open sub-region of the system are in excellent agreement with the equivalent quantities calculated in a full atomistic simulation, suggesting that the atomistic degrees of freedom outside the sub-region are negligible. The size of the sub-region considered in this study is 2 nm, which is essentially the size of a few ions. Insight from the study suggests that a higher degree of spatial locality seems to play a crucial role in characterizing the properties of imidazolium based ionic liquids.
Collapse
|
46
|
Bhattacharya G, Mitra S, Mandal P, Dutta S, Giri RP, Ghosh SK. Thermodynamics of interaction of ionic liquids with lipid monolayer. Biophys Rev 2018; 10:709-719. [PMID: 29305702 DOI: 10.1007/s12551-017-0390-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 12/13/2017] [Indexed: 11/29/2022] Open
Abstract
Understanding the interaction of ionic liquids with cellular membrane becomes utterly important to comprehend the activities of these liquids in living organisms. Lipid monolayer formed at the air-water interface is employed as a model system to follow this interaction by investigating important thermodynamic parameters. The penetration kinetics of the imidazolium-based ionic liquid 1-decyl-3-methylimidazolium tetrafluoroborate ([DMIM][BF4]) into the zwitterionic 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) lipid layer is found to follow the Boltzmann-like equation that reveals the characteristic time constant which is observed to be the function of initial surface pressure. The enthalpy and entropy calculated from temperature-dependent pressure-area isotherms of the monolayer show that the added ionic liquids bring about a disordering effect in the lipid film. The change in Gibbs free energy indicates that an ionic liquid with longer chain has a far greater disordering effect compared to an ionic liquid with shorter chain. The differential scanning calorimetric measurement on a multilamellar vesicle system shows the main phase transition temperature to shift to a lower value, which, again, indicates the disordering effect of the ionic liquid on lipid membrane. All these studies fundamentally point out that, when ionic liquids interact with lipid molecules, the self-assembled structure of a cellular membrane gets perturbed, which may be the mechanism of these molecules having adverse effects on living organisms.
Collapse
Affiliation(s)
- G Bhattacharya
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - S Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - P Mandal
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - S Dutta
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - R P Giri
- Saha Institute of Nuclear Physics, Bidhannagar, Kolkata, 700064, India
| | - S K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India.
| |
Collapse
|
47
|
Mendonça CMN, Balogh DT, Barbosa SC, Sintra TE, Ventura SPM, Martins LFG, Morgado P, Filipe EJM, Coutinho JAP, Oliveira ON, Barros-Timmons A. Understanding the interactions of imidazolium-based ionic liquids with cell membrane models. Phys Chem Chem Phys 2018; 20:29764-29777. [DOI: 10.1039/c8cp05035j] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
IL–phospholipid interactions were studied using Langmuir monolayers and molecular simulations.
Collapse
Affiliation(s)
- Carlos M. N. Mendonça
- CICECO-Aveiro Institute of Materials – Department of Chemistry
- University of Aveiro
- Campus de Santiago
- Aveiro
- Portugal
| | | | | | - Tânia E. Sintra
- CICECO-Aveiro Institute of Materials – Department of Chemistry
- University of Aveiro
- Campus de Santiago
- Aveiro
- Portugal
| | - Sónia P. M. Ventura
- CICECO-Aveiro Institute of Materials – Department of Chemistry
- University of Aveiro
- Campus de Santiago
- Aveiro
- Portugal
| | - Luís F. G. Martins
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - Pedro Morgado
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - Eduardo J. M. Filipe
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - João A. P. Coutinho
- CICECO-Aveiro Institute of Materials – Department of Chemistry
- University of Aveiro
- Campus de Santiago
- Aveiro
- Portugal
| | | | - Ana Barros-Timmons
- CICECO-Aveiro Institute of Materials – Department of Chemistry
- University of Aveiro
- Campus de Santiago
- Aveiro
- Portugal
| |
Collapse
|
48
|
Sharma VK, Ghosh SK, Mandal P, Yamada T, Shibata K, Mitra S, Mukhopadhyay R. Effects of ionic liquids on the nanoscopic dynamics and phase behaviour of a phosphatidylcholine membrane. SOFT MATTER 2017; 13:8969-8979. [PMID: 29152634 DOI: 10.1039/c7sm01799e] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Ionic liquids (ILs) are potential candidates for new antimicrobials due to their tunable antibacterial and antifungal properties that are required to keep pace with the growing challenge of bacterial resistance. To a great extent their antimicrobial actions are related to the interactions of ILs with cell membranes. Here, we report the effects of ILs on the nanoscopic dynamics and phase behaviour of a dimyristoylphosphatidylcholine (DMPC) membrane, a model cell membrane, as studied using neutron scattering techniques. Two prototypical imidazolium-based ILs 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM[BF4]) and 1-decyl-3-methylimidazolium tetrafluoroborate (DMIM[BF4]), which differ only in terms of the alkyl chain length of cations, have been used for the present study. Fixed Elastic Window Scan (FEWS) shows that the incorporation of ILs affects the phase behaviour of the phospholipid membrane significantly and the transition from a solid gel to a fluid phase shifts to lower temperature. This is found to be consistent with our differential scanning calorimetry measurements. DMIM[BF4], which has a longer alkyl chain cation, affects the phase behaviour more strongly in comparison to BMIM[BF4]. The pressure-area isotherms of the DMPC monolayer measured at the air-water interface show that in the presence of ILs, isotherms shift towards higher area-per lipid molecule. DMIM[BF4] is found to shift the isotherm to a greater extent compared to BMIM[BF4]. Quasielastic neutron scattering (QENS) data show that both ILs act as a plasticizer, which enhances the fluidity of the membrane. DMIM[BF4] is found to be a stronger plasticizing agent in comparison to BMIM[BF4] that has a cation with a shorter alkyl chain. The incorporation of DMIM[BF4] enhances not only the long range lateral motion but also the localised internal motion of the lipids. On the other hand, BMIM[BF4] acts weakly in comparison to DMIM[BF4] and mainly alters the localised internal motion of the lipids. Any subtle change in the dynamical properties of the membrane can profoundly affect the stability of the cell. Hence, the dominant effect of the IL with the longer chain length on the dynamics of the phospholipid membrane might be correlated with its cytotoxic activity. QENS data analysis has provided a quantitative description of the effects of the two imidazolium-based ILs on the dynamical and phase behaviour of the model cell membrane, which is essential for a detailed understanding of their action mechanism.
Collapse
Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | | | | | | | | | | |
Collapse
|
49
|
Russo G, Witos J, Rantamäki AH, Wiedmer SK. Cholesterol affects the interaction between an ionic liquid and phospholipid vesicles. A study by differential scanning calorimetry and nanoplasmonic sensing. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:2361-2372. [PMID: 28912102 DOI: 10.1016/j.bbamem.2017.09.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/01/2017] [Accepted: 09/10/2017] [Indexed: 10/18/2022]
Abstract
The present work aims at studying the interactions between cholesterol-rich phosphatidylcholine-based lipid vesicles and trioctylmethylphosphonium acetate ([P8881][OAc]), a biomass dissolving ionic liquid (IL). The effect of cholesterol was assayed by using differential scanning calorimetry (DSC) and nanoplasmonic sensing (NPS) measurement techniques. Cholesterol-enriched dipalmitoyl-phosphatidylcholine vesicles were exposed to different concentrations of the IL, and the derived membrane perturbation was monitored by DSC. The calorimetric data could suggest that the binding and infiltration of the IL are delayed in the vesicles containing cholesterol. To clarify our findings, NPS was applied to quantitatively follow the resistance of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine incorporating 0, 10, and 50mol% of cholesterol toward the IL exposure over time. The membrane perturbation induced by different concentrations of IL was found to be a concentration dependent process on cholesterol-free lipid vesicles. Moreover, our results showed that lipid depletion in cholesterol-enriched lipid vesicles is inversely proportional to the increasing amount of cholesterol in the vesicles. These findings support that cholesterol-rich lipid bilayers are less susceptible toward membrane disrupting agents as compared to membranes that do not incorporate any sterols. This probably occurs because cholesterol tightens the phospholipid acyl chain packing of the plasma membranes, increasing their resistance and reducing their permeability.
Collapse
Affiliation(s)
- Giacomo Russo
- Department of Chemistry, P. O. Box 55, FIN-00014, University of Helsinki, Helsinki, Finland.
| | - Joanna Witos
- Department of Chemistry, P. O. Box 55, FIN-00014, University of Helsinki, Helsinki, Finland.
| | - Antti H Rantamäki
- Department of Chemistry, P. O. Box 55, FIN-00014, University of Helsinki, Helsinki, Finland.
| | - Susanne K Wiedmer
- Department of Chemistry, P. O. Box 55, FIN-00014, University of Helsinki, Helsinki, Finland.
| |
Collapse
|
50
|
Benedetto A, Galla HJ. Overview of the "Ionic Liquids meet Biomolecules" session at the 19th international IUPAB and 11th EBSA congress. Biophys Rev 2017; 9:279-281. [PMID: 28812293 DOI: 10.1007/s12551-017-0309-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 07/31/2017] [Indexed: 12/01/2022] Open
Affiliation(s)
- Antonio Benedetto
- School of Physics, University College Dublin (UCD), Dublin 4, Ireland. .,Laboratory for Neutron Scattering, Paul Scherrer Institut (PSI), Villigen, Switzerland.
| | - Hans-Joachim Galla
- Institute of Biochemistry, University of Münster, Wilhelm-Klemm-Str. 2, 48149, Münster, Germany
| |
Collapse
|