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Lin J, Dargazany R, Alexander-Katz A. Lipid Flip-Flop and Pore Nucleation on Zwitterionic Bilayers are Asymmetric under Ionic Imbalance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603708. [PMID: 28426163 DOI: 10.1002/smll.201603708] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/11/2017] [Indexed: 06/07/2023]
Abstract
Lipid flip-flop and its associated transient pore formation are key thermodynamic properties of living cell membranes. However, there is a lack of understanding of whether ionic imbalance that exists ubiquitously across cell membranes affects lipid flip-flop and its associated functions. Potential of mean force calculations show that the free-energy barrier of lipid flip-flop on the extracellular leaflet reduces with the presence of ionic imbalance, whereas the barrier on the intracellular leaflet is generally not affected. The linear decrease of the activation energy of lipid flip-flop on the extracellular leaflet is consistent with the experimentally measured conductance-voltage relationship of zwitterionic lipid bilayers. This suggests: 1) lipid flip-flop has a directionality under physiological conditions and phospholipids accumulate at a rate on the order of 105 µm-2 h-1 on the cytoplasmic side of cell membranes; 2) ion permeation across a lipid membrane is moderated by lipid flip-flop; 3) the energy barrier of pore formation is aligned with the weaker leaflet that has a lower energy of lipid flip-flop. The asymmetry of lipid flip-flop and pore nucleation may have substantial implications for protein translocation, signaling, enzymatic activities, vesicle fusion, and transportation of biomolecules on cell membranes.
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Affiliation(s)
- Jiaqi Lin
- Department of Material Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Roozbeh Dargazany
- College of Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Alfredo Alexander-Katz
- Department of Material Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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2
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Persad AH, Ward CA. Expressions for the Evaporation and Condensation Coefficients in the Hertz-Knudsen Relation. Chem Rev 2016; 116:7727-67. [DOI: 10.1021/acs.chemrev.5b00511] [Citation(s) in RCA: 203] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aaron H. Persad
- Department
of Mechanical
and Industrial Engineering, Thermodynamics and Kinetics Laboratory, University of Toronto, 5 King’s College Road, Toronto, Canada M5S 3G8
| | - Charles A. Ward
- Department
of Mechanical
and Industrial Engineering, Thermodynamics and Kinetics Laboratory, University of Toronto, 5 King’s College Road, Toronto, Canada M5S 3G8
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3
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Kapoor A, Elliott JAW. Statistical rate theory insight into evaporation and condensation in multicomponent systems. J Phys Chem B 2010; 114:15052-6. [PMID: 20949956 DOI: 10.1021/jp106715v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Current approaches to mathematically modeling liquid-vapor mass transport (e.g., film theory, penetration theory, boundary layer theory) treat bulk phase transport accurately with diffusion models, but leave the transport across the interface to be described by empirically determined mass transfer coefficients. In multicomponent systems, this requires empirical mixing rules for the single-component mass transfer coefficients. Such approaches can only give estimates of net rates at the interface but cannot examine the movement of individual components. Here we use statistical rate theory to provide new physical insight into evaporation and condensation at interfaces in systems containing multiple volatile components. In contrast to the traditional multicomponent mass transfer approach, we show ranges where one component evaporates while the other condenses even when the net transport is unidirectional.
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Affiliation(s)
- Atam Kapoor
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton AB, Canada T6G 2V4
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4
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Kapoor A, Elliott JAW. Nonideal Statistical Rate Theory Formulation To Predict Evaporation Rates from Equations of State. J Phys Chem B 2008; 112:15005-13. [PMID: 18954106 DOI: 10.1021/jp804982g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Atam Kapoor
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G6
| | - Janet A. W. Elliott
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G6
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5
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Panczyk T, Szabelski P. The Influence of Lateral Interactions between Adsorbed Molecules on Adsorption Kinetics. A Statistical Rate Theory Approach. J Phys Chem B 2003. [DOI: 10.1021/jp034354z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomasz Panczyk
- Group for Theoretical Problems of Adsorption, Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland
| | - Pawel Szabelski
- Department of Theoretical Chemistry, Faculty of Chemistry, UMCS, pl. Marii Curie-Sklodowskiej 3, Lublin 20-031, Poland
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6
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Panczyk T, Rudzinski W. Kinetics of Multisite-Occupancy Adsorption on Heterogeneous Solid Surfaces: A Statistical Rate Theory Approach. J Phys Chem B 2002. [DOI: 10.1021/jp020570g] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomasz Panczyk
- Group for Theoretical Problems of Adsorption, Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland
| | - Wladyslaw Rudzinski
- Group for Theoretical Problems of Adsorption, Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland
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7
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Nitsche JM. Cellular microtransport processes: intercellular, intracellular, and aggregate behavior. Annu Rev Biomed Eng 2002; 1:463-503. [PMID: 11701497 DOI: 10.1146/annurev.bioeng.1.1.463] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ionic and molecular transfer among cells occurs by a variety of transport processes operative at different length scales. Cell membrane permeability and electrical conductance derive from channel proteins producing pores at the molecular (ultrastructural) scale. Intracellular mobility involves the dynamics of motion through the complex ultrastructure of the cytoplasm. These phenomena unite in the larger-scale (microscopic) process of gross intercellular transfer. When such movement occurs among sufficiently many cells, it in turn begins to reflect their average collective (macroscopic) behavior as bulk tissue. This article surveys selected aspects of intercellular and intracellular transport, with emphasis on detailed mechanistic theory, experimental probes of cellular permeability, and systematic transcendence from small to large length scales.
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Affiliation(s)
- J M Nitsche
- Department of Chemical Engineering, State University of New York at Buffalo, Buffalo, New York 14260-4200, USA.
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8
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Rudzinski W, Panczyk T. Kinetics of Gas Adsorption in Activated Carbons, Studied by Applying the Statistical Rate Theory of Interfacial Transport. J Phys Chem B 2001. [DOI: 10.1021/jp004166y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wladyslaw Rudzinski
- Department of Theoretical Chemistry, Faculty of Chemistry UMCS, pl. Marii Curie-Sklodowskiej 3, Lublin, 20-031, Poland
| | - Tomasz Panczyk
- Department of Theoretical Chemistry, Faculty of Chemistry UMCS, pl. Marii Curie-Sklodowskiej 3, Lublin, 20-031, Poland
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9
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Elliott JAW, Elmoazzen HY, McGann LE. A method whereby Onsager coefficients may be evaluated. J Chem Phys 2000. [DOI: 10.1063/1.1289464] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Rudzinski W, Panczyk T. Kinetics of Isothermal Adsorption on Energetically Heterogeneous Solid Surfaces: A New Theoretical Description Based on the Statistical Rate Theory of Interfacial Transport. J Phys Chem B 2000. [DOI: 10.1021/jp000045m] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wladyslaw Rudzinski
- Departament of Theoretical Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, Place Marii Curie-Sklodowskiej 3, Lublin, 20-031, Poland
| | - Tomasz Panczyk
- Departament of Theoretical Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, Place Marii Curie-Sklodowskiej 3, Lublin, 20-031, Poland
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11
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Bordi F, Cametti C, Motta A. Ion Permeation Across Model Lipid Membranes: A Kinetic Approach. J Phys Chem B 2000. [DOI: 10.1021/jp000005i] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. Bordi
- Dipartimento di Medicina Interna, Universitá di Roma “Tor Vergata”, Rome, Italy, and Istituto Nazionale per la Fisica della Materia (INFM), Unitá di Roma 1
| | - C. Cametti
- Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Piazzale A. Moro 5, I-00185 Rome, Italy, and Istituto Nazionale per la Fisica della Materia (INFM), Unitá di Roma 1
| | - A. Motta
- Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Piazzale A. Moro 5, I-00185 Rome, Italy, and Istituto Nazionale per la Fisica della Materia (INFM), Unitá di Roma 1
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12
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Torri M, Elliott JAW. A statistical rate theory description of CO diffusion on a stepped Pt(111) surface. J Chem Phys 1999. [DOI: 10.1063/1.479428] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Abstract
The current-voltage relationships of model bilayer membranes have been measured in various phospholipid systems, under the influence of both a gradient of potential and an ionic concentration, in order to describe the ion translocation through hydrated transient defects (water channels) across the bilayer formed because of lipid structure fluctuations and induced by temperature. The results have been analyzed in the light of a statistical rate theory for the transport process across a lipid bilayer, recently proposed by Skinner et al. (1993). In order to take into account the observed I-V curves and in particular the deviation from an ohmic behavior observed at high potential values, the original model has been modified, and a new version has been proposed by introducing an additional kinetic process. In this way, a very good agreement with the experimental values has been obtained for all of the systems we have investigated (dimyristoylphosphatidyl ethanolamine bilayers and mixed systems composed by dimyristoylphosphatidyl ethanolamine/dimyristoylphosphatidylcholine mixtures and dimyristoylphosphatidyl ethanolamine/phosphatidic acid dipalmitoyl mixtures). The rate constants governing the reactions at the bilayer interfaces have been evaluated for K+ and Cl- ions, as a function of temperature, from 5 to 35 degrees C and bulk ionic concentrations from 0.02 to 0.2 M. Finally, a comparison between the original model of Skinner and the modified version is presented, and the advantages of this new formulation are briefly discussed.
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Affiliation(s)
- F Bordi
- Dipartimento di Medicina Interna, Univerista' di Roma Tor Vergata, and Istituto Nazionale di Fisica della Materia, Rome, Italy
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14
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Elliott JAW, Ward CA. Temperature programmed desorption: A statistical rate theory approach. J Chem Phys 1997. [DOI: 10.1063/1.473588] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Elliott JAW, Ward CA. Statistical rate theory description of beam-dosing adsorption kinetics. J Chem Phys 1997. [DOI: 10.1063/1.473587] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Elliott J, Ward C. Chapter 5. Statistical rate theory and the material properties controlling adsorption kinetics, on well defined surfaces. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0167-2991(97)80068-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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17
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Bordi F, Cametti C, Natali F. Electrical conductivity and ion permeation in planar lipid membranes. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s0302-4598(96)05094-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vigmond EJ, Bardakjian BL. Efficient and accurate computation of the electric fields of excitable cells. Ann Biomed Eng 1996; 24:168-79. [PMID: 8669714 DOI: 10.1007/bf02771005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The numerical computation of the electric fields produced by excitable cells is important in many applications. Traditionally, a potential formulation was used. An integral formulation based on the differentiation of Green's theorem, which solves directly for the electric field, is presented herein. This is desirable because the electric field is proportional to current density, which can be calculated on the cell membrane. Fredholm equations of the second kind are produced, which are more appropriate than are those of the first kind (produced by formulations based on potential). Analytic formulae are presented to calculate the required matrix entries for zeroth order triangular elements that are generally used for field computations in boundary element methods. Results indicated that significantly more accurate answers may be obtained with significantly less computation by formulating the problem directly in terms of electric field as opposed to potential. This approach has the additional advantage that, for equal intracellular and extracellular conductivities, only one matrix must be generated, and no system of simultaneous equations must be solved; this drastically reduces storage and computation requirements. Examples are given to illustrate this technique and to compare the electric field formulation with the potential formulation.
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Affiliation(s)
- E J Vigmond
- Institute of Biomedical Engineering, University of Toronto, Ontario, Canada
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