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Paez-Perez M, Dent MR, Brooks NJ, Kuimova MK. Viscosity-Sensitive Membrane Dyes as Tools To Estimate the Crystalline Structure of Lipid Bilayers. Anal Chem 2023; 95:12006-12014. [PMID: 37526607 PMCID: PMC10433245 DOI: 10.1021/acs.analchem.3c01747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 07/12/2023] [Indexed: 08/02/2023]
Abstract
Lipid membranes are crucial for cellular integrity and regulation, and tight control of their structural and mechanical properties is vital to ensure that they function properly. Fluorescent probes sensitive to the membrane's microenvironment are useful for investigating lipid membrane properties; however, there is currently a lack of quantitative correlation between the exact parameters of lipid organization and a readout from these dyes. Here, we investigate this relationship for "molecular rotors", or microviscosity sensors, by simultaneously measuring their fluorescence lifetime to determine the membrane viscosity, while using X-ray diffraction to determine the membrane's structural properties. Our results reveal a phase-dependent correlation between the membrane's structural parameters and mechanical properties measured by a BODIPY-based molecular rotor, giving excellent predictive power for the structural descriptors of the lipid bilayer. We also demonstrate that differences in membrane thickness between different lipid phases are not a prerequisite for the formation of lipid microdomains and that this requirement can be disrupted by the presence of line-active molecules. Our results underpin the use of membrane-sensitive dyes as reporters of the structure of lipid membranes.
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Affiliation(s)
- Miguel Paez-Perez
- MSRH, Department of Chemistry, Imperial College London, Wood Lane, London W12 0BZ, U.K.
| | - Michael R. Dent
- MSRH, Department of Chemistry, Imperial College London, Wood Lane, London W12 0BZ, U.K.
| | - Nicholas J. Brooks
- MSRH, Department of Chemistry, Imperial College London, Wood Lane, London W12 0BZ, U.K.
| | - Marina K. Kuimova
- MSRH, Department of Chemistry, Imperial College London, Wood Lane, London W12 0BZ, U.K.
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Sherin PS, López-Duarte I, Dent MR, Kubánková M, Vyšniauskas A, Bull JA, Reshetnikova ES, Klymchenko AS, Tsentalovich YP, Kuimova MK. Visualising the membrane viscosity of porcine eye lens cells using molecular rotors. Chem Sci 2017; 8:3523-3528. [PMID: 28580097 PMCID: PMC5435988 DOI: 10.1039/c6sc05369f] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 02/14/2017] [Indexed: 12/15/2022] Open
Abstract
The plasma membranes of cells within the eye lens play an important role in metabolite transport within the avascular tissue of the lens, maintaining its transparency over the entire lifespan of an individual. Here we use viscosity-sensitive 'molecular rotors' to map the microscopic viscosity within these unusual cell membranes, establishing that they are characterised by an unprecedentedly high degree of lipid organisation.
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Affiliation(s)
- Peter S Sherin
- International Tomography Center SB RAS , Institutskaya Street 3A , 630090 , Novosibirsk , Russia .
- Department of Natural Sciences , Novosibirsk State University , Pirogova Street 2 , 630090 , Novosibirsk , Russia
| | - Ismael López-Duarte
- Department of Chemistry , Imperial College London , Exhibition Road , London , SW7 2AZ , UK .
| | - Michael R Dent
- Department of Chemistry , Imperial College London , Exhibition Road , London , SW7 2AZ , UK .
| | - Markéta Kubánková
- Department of Chemistry , Imperial College London , Exhibition Road , London , SW7 2AZ , UK .
| | - Aurimas Vyšniauskas
- Department of Chemistry , Imperial College London , Exhibition Road , London , SW7 2AZ , UK .
| | - James A Bull
- Department of Chemistry , Imperial College London , Exhibition Road , London , SW7 2AZ , UK .
| | - Evdokiya S Reshetnikova
- Institute of Molecular and Cellular Biology SB RAS , 8/2 Lavrentiev Avenue , 630090 , Novosibirsk , Russia
| | - Andrey S Klymchenko
- Laboratoire de Biophotonique et Pharmacologie , UMR 7213 CNRS , Faculté de Pharmacie , Université de Strasbourg , 74 Route du Rhin , 67401 ILLKIRCH Cedex , France
| | - Yuri P Tsentalovich
- International Tomography Center SB RAS , Institutskaya Street 3A , 630090 , Novosibirsk , Russia .
- Department of Natural Sciences , Novosibirsk State University , Pirogova Street 2 , 630090 , Novosibirsk , Russia
| | - Marina K Kuimova
- Department of Chemistry , Imperial College London , Exhibition Road , London , SW7 2AZ , UK .
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Dent MR, López-Duarte I, Dickson CJ, Geoghegan ND, Cooper JM, Gould IR, Krams R, Bull JA, Brooks NJ, Kuimova MK. Imaging phase separation in model lipid membranes through the use of BODIPY based molecular rotors. Phys Chem Chem Phys 2016; 17:18393-402. [PMID: 26104504 DOI: 10.1039/c5cp01937k] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In order to fully understand the dynamics of processes within biological lipid membranes, it is necessary to possess an intimate knowledge of the physical state and ordering of lipids within the membrane. Here we report the use of three molecular rotors based on meso-substituted boron-dipyrrin (BODIPY) in combination with fluorescence lifetime spectroscopy to investigate the viscosity and phase behaviour of model lipid bilayers. In phase-separated giant unilamellar vesicles, we visualise both liquid-ordered (Lo) and liquid-disordered (Ld) phases using fluorescence lifetime imaging microscopy (FLIM), determining their associated viscosity values, and investigate the effect of composition on the viscosity of these phases. Additionally, we use molecular dynamics simulations to investigate the orientation of the BODIPY probes within the bilayer, as well as using molecular dynamics simulations and fluorescence correlation spectroscopy (FCS) to compare diffusion coefficients with those predicted from the fluorescence lifetimes of the probes.
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Affiliation(s)
- Michael R Dent
- Department of Chemistry, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.
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Dent MR, López-Duarte I, Dickson CJ, Chairatana P, Anderson HL, Gould IR, Wylie D, Vyšniauskas A, Brooks NJ, Kuimova MK. Imaging plasma membrane phase behaviour in live cells using a thiophene-based molecular rotor. Chem Commun (Camb) 2016; 52:13269-13272. [DOI: 10.1039/c6cc05954f] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A thiophene-based molecular rotor was used to probe ordering and viscosity within artificial lipid bilayers and live cell plasma membranes.
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Affiliation(s)
| | - Ismael López-Duarte
- Department of Chemistry
- Imperial College London
- London
- UK
- Department of Chemistry
| | - Callum J. Dickson
- Computer-Aided Drug Discovery
- Global Discovery Chemistry
- Novartis Institutes for BioMedical Research
- Cambridge
- USA
| | - Phoom Chairatana
- Department of Chemistry
- Chemistry Research Laboratory
- Oxford University
- Oxford
- UK
| | - Harry L. Anderson
- Department of Chemistry
- Chemistry Research Laboratory
- Oxford University
- Oxford
- UK
| | - Ian R. Gould
- Department of Chemistry
- Imperial College London
- London
- UK
| | - Douglas Wylie
- Department of Chemistry
- Imperial College London
- London
- UK
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Adam KR, Donnelly S, Leong AJ, Lindoy LF, McCool BJ, Bashall A, Dent MR, Murphy BP, McPartlin M, Fenton DE, Tasker PA. Interaction of related open-chain and macrocyclic ligands incorporating oxygen- and nitrogen-donor atoms with COII, NiII, CuII, ZnII, and CdII. X-Ray structures of a seven-co-ordinate zinc(II) complex as well as seven- and eight-co-ordinate cadmium(II) derivatives. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/dt9900001635] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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