Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid
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 cellu...
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doaj-88ff198f34f4407684b7ad796bcfa0042020-11-25T04:04:30ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-11-01810.3389/fchem.2020.577508577508Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic LiquidVeerendra K. Sharma0Veerendra K. Sharma1Sajal K. Ghosh2Victoria García Sakai3R. Mukhopadhyay4R. Mukhopadhyay5Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, IndiaHomi Bhabha National Institute, Mumbai, IndiaDepartment of Physics, School of Natural Sciences, Shiv Nadar University, Greater Noida, IndiaRutherford Appleton Laboratory, ISIS Pulsed Neutron and Muon Facility, Science and Technology Facilities Council, Didcot, United KingdomSolid State Physics Division, Bhabha Atomic Research Centre, Mumbai, IndiaHomi Bhabha National Institute, Mumbai, IndiaIonic 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.https://www.frontiersin.org/articles/10.3389/fchem.2020.577508/fullionic liquidslipid membraneneutron scatteringlateral motioninternal motion |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Veerendra K. Sharma Veerendra K. Sharma Sajal K. Ghosh Victoria García Sakai R. Mukhopadhyay R. Mukhopadhyay |
spellingShingle |
Veerendra K. Sharma Veerendra K. Sharma Sajal K. Ghosh Victoria García Sakai R. Mukhopadhyay R. Mukhopadhyay Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid Frontiers in Chemistry ionic liquids lipid membrane neutron scattering lateral motion internal motion |
author_facet |
Veerendra K. Sharma Veerendra K. Sharma Sajal K. Ghosh Victoria García Sakai R. Mukhopadhyay R. Mukhopadhyay |
author_sort |
Veerendra K. Sharma |
title |
Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid |
title_short |
Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid |
title_full |
Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid |
title_fullStr |
Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid |
title_full_unstemmed |
Enhanced Microscopic Dynamics of a Liver Lipid Membrane in the Presence of an Ionic Liquid |
title_sort |
enhanced microscopic dynamics of a liver lipid membrane in the presence of an ionic liquid |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Chemistry |
issn |
2296-2646 |
publishDate |
2020-11-01 |
description |
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. |
topic |
ionic liquids lipid membrane neutron scattering lateral motion internal motion |
url |
https://www.frontiersin.org/articles/10.3389/fchem.2020.577508/full |
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