1
|
Gaudu N, Farr O, Ona-Nguema G, Duval S. Dissolved metal ions and mineral-liposome hybrid systems: Underlying interactions, synthesis, and characterization. Biochimie 2023; 215:100-112. [PMID: 37699473 DOI: 10.1016/j.biochi.2023.09.009] [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: 06/07/2023] [Revised: 07/19/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023]
Abstract
Liposomes are versatile lipid-based vesicles with interesting physicochemical properties, making them excellent candidates for interdisciplinary applications in the medicinal, biological, and environmental sciences. The synthesis of mineral-liposome hybrid systems lends normally inert vesicles with the catalytic, magnetic, electrical, and optical properties of the integrated mineral species. Such applications require an understanding of the physicochemical interactions between organic molecules and inorganic crystal structures. This review provides an overview on these interactions and details on synthesis and characterization methods for these systems.
Collapse
Affiliation(s)
- Nil Gaudu
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP), Aix-Marseille Université, UMR 7281 IMM-CNRS, 31 Chemin Joseph Aiguier, 13400, Marseille, France.
| | - Orion Farr
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP), Aix-Marseille Université, UMR 7281 IMM-CNRS, 31 Chemin Joseph Aiguier, 13400, Marseille, France; Centre Interdisciplinaire des Nanosciences de Marseille (CINaM), Aix-Marseille Université, UMR 7325 CNRS, Campus de Luminy, 13288, Marseille, France
| | - Georges Ona-Nguema
- Sorbonne Université - CNRS UMR 7590 - Muséum National D'Histoire Naturelle - IRD UMR 206, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Faculté des Sciences et Ingénierie, Campus Pierre & Marie Curie, 4 Place Jussieu, F-75005, Paris, France
| | - Simon Duval
- Laboratoire de Bioénergétique et Ingénierie des Protéines (BIP), Aix-Marseille Université, UMR 7281 IMM-CNRS, 31 Chemin Joseph Aiguier, 13400, Marseille, France
| |
Collapse
|
2
|
Abucayon EG, Rao M, Matyas GR, Alving CR. QS21-Initiated Fusion of Liposomal Small Unilamellar Vesicles to Form ALFQ Results in Concentration of Most of the Monophosphoryl Lipid A, QS21, and Cholesterol in Giant Unilamellar Vesicles. Pharmaceutics 2023; 15:2212. [PMID: 37765181 PMCID: PMC10537867 DOI: 10.3390/pharmaceutics15092212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/12/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
Army Liposome Formulation with QS21 (ALFQ), a vaccine adjuvant preparation, comprises liposomes containing saturated phospholipids, with 55 mol% cholesterol relative to the phospholipids, and two adjuvants, monophosphoryl lipid A (MPLA) and QS21 saponin. A unique feature of ALFQ is the formation of giant unilamellar vesicles (GUVs) having diameters >1.0 µm, due to a remarkable fusion event initiated during the addition of QS21 to nanoliposomes containing MPLA and 55 mol% cholesterol relative to the total phospholipids. This results in a polydisperse size distribution of ALFQ particles, with diameters ranging from ~50 nm to ~30,000 nm. The purpose of this work was to gain insights into the unique fusion reaction of nanovesicles leading to GUVs induced by QS21. This fusion reaction was probed by comparing the lipid compositions and structures of vesicles purified from ALFQ, which were >1 µm (i.e., GUVs) and the smaller vesicles with diameter <1 µm. Here, we demonstrate that after differential centrifugation, cholesterol, MPLA, and QS21 in the liposomal phospholipid bilayers were present mainly in GUVs (in the pellet). Presumably, this occurred by rapid lateral diffusion during the transition from nanosize to microsize particles. While liposomal phospholipid recoveries by weight in the pellet and supernatant were 44% and 36%, respectively, higher percentages by weight of the cholesterol (~88%), MPLA (94%), and QS21 (96%) were recovered in the pellet containing GUVs, and ≤10% of these individual liposomal constituents were recovered in the supernatant. Despite the polydispersity of ALFQ, most of the cholesterol, and almost all of the adjuvant molecules, were present in the GUVs. We hypothesize that the binding of QS21 to cholesterol caused new structural nanodomains, and subsequent interleaflet coupling in the lipid bilayer might have initiated the fusion process, leading to creation of GUVs. However, the polar regions of MPLA and QS21 together have a "sugar lawn" of ten sugars, the hydrophilicity of which might have provided a driving force for rapid lateral diffusion and concentration of the MPLA and QS21 in the GUVs.
Collapse
Affiliation(s)
- Erwin G. Abucayon
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA; (M.R.); (G.R.M.)
- Henry M. Jackson Foundation for the Advancement of Military Medicine, 6720A Rockledge Drive, Bethesda, MD 20817, USA
| | - Mangala Rao
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA; (M.R.); (G.R.M.)
| | - Gary R. Matyas
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA; (M.R.); (G.R.M.)
| | - Carl R. Alving
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA; (M.R.); (G.R.M.)
| |
Collapse
|
3
|
Trallero J, Camacho M, Marín-García M, Álvarez-Marimon E, Benseny-Cases N, Barnadas-Rodríguez R. Properties and cellular uptake of photo-triggered mixed metallosurfactant vesicles intended for controlled CO delivery in gas therapy. Colloids Surf B Biointerfaces 2023; 228:113422. [PMID: 37356136 DOI: 10.1016/j.colsurfb.2023.113422] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/13/2023] [Accepted: 06/19/2023] [Indexed: 06/27/2023]
Abstract
The scientific relevance of carbon monoxide has increased since it was discovered that it is a gasotransmitter involved in several biological processes. This fact stimulated research to find a secure and targeted delivery and lead to the synthesis of CO-releasing molecules. In this paper we present a vesicular CO delivery system triggered by light composed of a synthetized metallosurfactant (TCOL10) with two long carbon chains and a molybdenum-carbonyl complex. We studied the characteristics of mixed TCOL10/phosphatidylcholine metallosomes of different sizes. Vesicles from 80 to 800 nm in diameter are mainly unilamellar, do not disaggregate upon dilution, in the dark are physically and chemically stable at 4 °C for at least one month, and exhibit a lag phase of about 4 days before they show a spontaneous CO release at 37 °C. Internalization of metallosomes by cells was studied as function of the incubation time, and vesicle concentration and size. Results show that large vesicles are more efficiently internalized than the smaller ones in terms of the percentage of cells that show TCOL10 and the amount of drug that they take up. On balance, TCOL10 metallosomes constitute a promising and viable approach for efficient delivery of CO to biological systems.
Collapse
Affiliation(s)
- Jan Trallero
- Universitat Autònoma de Barcelona, Biophysics Unit/Center for Biophysical Studies, Department of Biochemistry and Molecular Biology, Faculty of Medicine, 08193 Cerdanyola del Vallès, Spain
| | - Mercedes Camacho
- Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau - Centre CERCA, Genomics of Complex Diseases, Barcelona, Spain
| | - Maribel Marín-García
- Universitat Autònoma de Barcelona, Biophysics Unit/Center for Biophysical Studies, Department of Biochemistry and Molecular Biology, Faculty of Medicine, 08193 Cerdanyola del Vallès, Spain
| | - Elena Álvarez-Marimon
- Universitat Autònoma de Barcelona, Biophysics Unit/Center for Biophysical Studies, Department of Biochemistry and Molecular Biology, Faculty of Medicine, 08193 Cerdanyola del Vallès, Spain
| | - Núria Benseny-Cases
- Universitat Autònoma de Barcelona, Biophysics Unit/Center for Biophysical Studies, Department of Biochemistry and Molecular Biology, Faculty of Medicine, 08193 Cerdanyola del Vallès, Spain; Consorcio para la Construcción Equipamiento y Explotacion del Laboratorio de Luz Sincrotron, ALBA Synchrotron Light Source, 08290 Cerdanyola del Vallès, Catalonia, Spain.
| | - Ramon Barnadas-Rodríguez
- Universitat Autònoma de Barcelona, Biophysics Unit/Center for Biophysical Studies, Department of Biochemistry and Molecular Biology, Faculty of Medicine, 08193 Cerdanyola del Vallès, Spain.
| |
Collapse
|
4
|
Elmaidomy AH, Mohamad SA, Abdelnaser M, Yahia R, Mokhtar FA, Alsenani F, Badr MY, Almaghrabi SY, Altemani FH, Alzubaidi MA, Saber EA, Elrehany MA, Abdelmohsen UR, Sayed AM. Vitis vinifera leaf extract liposomal Carbopol gel preparation's potential wound healing and antibacterial benefits: in vivo, phytochemical, and computational investigation. Food Funct 2023; 14:7156-7175. [PMID: 37462414 DOI: 10.1039/d2fo03212k] [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: 08/01/2023]
Abstract
Vitis vinifera Egyptian edible leaf extract loaded on a soybean lecithin, cholesterol, and Carbopol gel preparation (VVL-liposomal gel) was prepared to maximize the in vivo wound healing and anti-MRSA activities for the crude extract, using an excision wound model and focusing on TLR-2, MCP-1, CXCL-1, CXCL-2, IL-6 and IL-1β, and MRSA (wound infection model, and peritonitis infection model). VVL-liposomal gel was stable with significant drug entrapment efficiency reaching 88% ± 3, zeta potential value ranging from -50 to -63, and a size range of 50-200 μm nm in diameter. The in vivo evaluation proved the ability of VVL-liposomal gel to gradually release the drugs in a sustained manner with greater complete wound healing effect and tissue repair after 7 days of administration, with a significant decrease in bacterial count compared with the crude extract. Phytochemical investigation of the crude extract of the leaves yielded fourteen compounds: two new stilbenes (1, 2), along with twelve known ones (3-14). Furthermore, a computational study was conducted to identify the genes and possible pathways responsible for the anti-MRSA activity of the isolated compounds, and inverse docking was used to identify the most likely molecular targets that could mediate the extract's antibacterial activity. Gyr-B was discovered to be the best target for compounds 1 and 2. Hence, VVL-liposomal gel can be used as a novel anti-dermatophytic agent with potent wound healing and anti-MRSA capacity, paving the way for future clinical research.
Collapse
Affiliation(s)
- Abeer H Elmaidomy
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt.
| | - Soad A Mohamad
- Department of Pharmaceutics and Clinical Pharmacy, Faculty of Pharmacy, Deraya University, New Minya 61111, Egypt
| | - Mahmoud Abdelnaser
- Department of Biochemistry, Faculty of Pharmacy, Deraya University, New Minya 61111, Egypt
| | - Ramadan Yahia
- Department of Microbiology and Immunology, Faculty of Pharmacy, Deraya University, Universities Zone, New Minya City 61111, Egypt
| | - Fatma A Mokhtar
- Department of Pharmacognosy, Faculty of Pharmacy, El Saleheya El Gadida University, El Saleheya El Gadida 44813, Sharkia, Egypt
| | - Faisal Alsenani
- Department of Pharmacognosy, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia.
| | - Moutaz Y Badr
- Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah 24381, Saudi Arabia.
| | - Safa Y Almaghrabi
- Department of Physiology, Faculty of Medicine, King Abduaziz University, Jeddah 22252, Saudi Arabia.
| | - Faisal H Altemani
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Mubarak A Alzubaidi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Entesar Ali Saber
- Department of Histology and Cell Biology, Faculty of Medicine, Minia University, Minya 61519, Egypt
- Delegated to Deraya University, Universities Zone, New Minya 61111, Egypt
| | - Mahmoud A Elrehany
- Department of Biochemistry, Faculty of Pharmacy, Deraya University, New Minya 61111, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minya 61519, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minya 61111, Egypt
| | - Ahmed M Sayed
- Department of Pharmacognosy, Faculty of Pharmacy, Nahda University, Beni-Suef 62513, Egypt.
| |
Collapse
|
5
|
Katke C, Pedrueza-Villalmanzo E, Spustova K, Ryskulov R, Kaplan CN, Gözen I. Colony-like Protocell Superstructures. ACS NANO 2023; 17:3368-3382. [PMID: 36795609 PMCID: PMC9979656 DOI: 10.1021/acsnano.2c08093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
We report the formation, growth, and dynamics of model protocell superstructures on solid surfaces, resembling single cell colonies. These structures, consisting of several layers of lipidic compartments enveloped in a dome-shaped outer lipid bilayer, emerged as a result of spontaneous shape transformation of lipid agglomerates deposited on thin film aluminum surfaces. Collective protocell structures were observed to be mechanically more stable compared to isolated spherical compartments. We show that the model colonies encapsulate DNA and accommodate nonenzymatic, strand displacement DNA reactions. The membrane envelope is able to disassemble and expose individual daughter protocells, which can migrate and attach via nanotethers to distant surface locations, while maintaining their encapsulated contents. Some colonies feature "exocompartments", which spontaneously extend out of the enveloping bilayer, internalize DNA, and merge again with the superstructure. A continuum elastohydrodynamic theory that we developed suggests that a plausible driving force behind subcompartment formation is attractive van der Waals (vdW) interactions between the membrane and surface. The balance between membrane bending and vdW interactions yields a critical length scale of 236 nm, above which the membrane invaginations can form subcompartments. The findings support our hypotheses that in extension of the "lipid world hypothesis", protocells may have existed in the form of colonies, potentially benefiting from the increased mechanical stability provided by a superstructure.
Collapse
Affiliation(s)
- Chinmay Katke
- Department
of Physics, Virginia Polytechnic Institute
and State University, Blacksburg, Virginia 24061, United States
- Center
for Soft Matter and Biological Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Esteban Pedrueza-Villalmanzo
- Department
of Chemistry and Chemical Engineering, Chalmers
University of Technology, Göteborg SE-412 96, Sweden
- Department
of Physics, University of Gothenburg, Universitetsplatsen 1, Gothenburg 405 30, Sweden
| | - Karolina Spustova
- Centre
for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway
| | - Ruslan Ryskulov
- Department
of Chemistry and Chemical Engineering, Chalmers
University of Technology, Göteborg SE-412 96, Sweden
| | - C. Nadir Kaplan
- Department
of Physics, Virginia Polytechnic Institute
and State University, Blacksburg, Virginia 24061, United States
- Center
for Soft Matter and Biological Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Irep Gözen
- Centre
for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway
| |
Collapse
|
6
|
Yang J, Xu Y, Fu Z, Chen J, Fan W, Wu X. Progress in research and development of temozolomide brain-targeted preparations: a review. J Drug Target 2023; 31:119-133. [PMID: 36039767 DOI: 10.1080/1061186x.2022.2119243] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Gliomas are a heterogeneous group of brain tumours with high malignancy, for which surgical resection remains the mainstay of treatment at present. However, the overall prognosis of gliomas remains poor because of their aggressiveness and high recurrence. Temozolomide (TMZ) has anti-proliferative and cytotoxic effects and is indicated for glioblastoma multiforme and recurrent mesenchymal astrocytoma. However, TMZ is disadvantaged by low efficacy and drug resistance, and therefore it is necessary to enhance the brain drug concentration of TMZ to improve its effectiveness and reduce the toxic and adverse effects from systemic administration. There have been many nano-formulations developed for the delivery of TMZ to gliomas that overcome the limitations of TMZ penetration to tumours and increase brain targeting. In this paper, we review the research progress of TMZ nano-formulations, and also discuss challenges and opportunities in the research and development of drug delivery systems, hoping that the data and information summarised herein could provide assistance for the clinical treatment of gliomas.
Collapse
Affiliation(s)
- Jiefen Yang
- Department of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Youfa Xu
- Department of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China.,Department of Pharmacy, Shanghai Wei Er Biopharmaceutical Technology Co., Ltd, Shanghai, China
| | - Zhiqin Fu
- Department of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China.,Department of Pharmacy, Shanghai Wei Er Biopharmaceutical Technology Co., Ltd, Shanghai, China
| | - Jianming Chen
- Department of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Wei Fan
- Department of Pharmacy, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xin Wu
- Department of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, China.,Department of Pharmacy, Shanghai Wei Er Biopharmaceutical Technology Co., Ltd, Shanghai, China
| |
Collapse
|
7
|
Warner JM, An D, Stratton BS, O'Shaughnessy B. A hemifused complex is the hub in a network of pathways to membrane fusion. Biophys J 2023; 122:374-385. [PMID: 36463406 PMCID: PMC9892611 DOI: 10.1016/j.bpj.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 06/25/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
Membrane fusion is a critical step for many essential processes, from neurotransmission to fertilization. For over 40 years, protein-free fusion driven by calcium or other cationic species has provided a simplified model of biological fusion, but the mechanisms remain poorly understood. Cation-mediated membrane fusion and permeation are essential in their own right to drug delivery strategies based on cell-penetrating peptides or cation-bearing lipid nanoparticles. Experimental studies suggest calcium drives anionic membranes to a hemifused intermediate that constitutes a hub in a network of pathways, but the pathway selection mechanism is unknown. Here we develop a mathematical model that identifies the network hub as a highly dynamic hemifusion complex. Multivalent cations drive expansion of this high-tension hemifusion interface between interacting vesicles during a brief transient. The fate of this interface determines the outcome, either fusion, dead-end hemifusion, or vesicle lysis. The model reproduces the unexplained finding that calcium-driven fusion of vesicles with planar membranes typically stalls at hemifusion, and we show the equilibrated hemifused state is a novel lens-shaped complex. Thus, membrane fusion kinetics follow a stochastic trajectory within a network of pathways, with outcome weightings set by a hemifused complex intermediate.
Collapse
Affiliation(s)
- Jason M Warner
- Department of Chemical Engineering, Columbia University, New York, New York
| | - Dong An
- Department of Chemical Engineering, Columbia University, New York, New York
| | | | - Ben O'Shaughnessy
- Department of Chemical Engineering, Columbia University, New York, New York.
| |
Collapse
|
8
|
Kurakin S, Ivankov O, Skoi V, Kuklin A, Uhríková D, Kučerka N. Cations Do Not Alter the Membrane Structure of POPC—A Lipid With an Intermediate Area. Front Mol Biosci 2022; 9:926591. [PMID: 35898308 PMCID: PMC9312375 DOI: 10.3389/fmolb.2022.926591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/07/2022] [Indexed: 12/02/2022] Open
Abstract
Combining small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and densitometric measurements, we have studied the interactions of the divalent cations Ca2+ and Mg2+ with the lipid vesicles prepared of a mixed-chain palmitoyl-oleoyl-phosphatidylcholine (POPC) at 25°C. The structural parameters of the POPC bilayer, such as the bilayer thickness, lateral area, and volume per lipid, displayed no changes upon the ion addition at concentrations up to 30 mM and minor changes at > 30 mM Ca2+ and Mg2+, while some decrease in the vesicle radius was observed over the entire concentration range studied. This examination allows us to validate the concept of lipid–ion interactions governed by the area per lipid suggested previously and to propose the mixed mode of those interactions that emerge in the POPC vesicles. We speculate that the average area per POPC lipid that corresponds to the cutoff length of lipid–ion interactions generates an equal but opposite impact on ion bridges and separate lipid–ion pairs. As a result of the dynamic equilibrium, the overall structural properties of bilayers are not affected. As the molecular mechanism proposed is affected by the structural properties of a particular lipid, it might help us to understand the fundamentals of processes occurring in complex multicomponent membrane systems.
Collapse
Affiliation(s)
- Sergei Kurakin
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
- Institute of Physics, Kazan Federal University, Kazan, Russia
| | - Oleksandr Ivankov
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
| | - Vadim Skoi
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
- Moscow Institute of Physics and Technology, Dolgoprudnyi, Russia
| | - Alexander Kuklin
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
- Moscow Institute of Physics and Technology, Dolgoprudnyi, Russia
| | - Daniela Uhríková
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University Bratislava, Bratislava, Slovakia
| | - Norbert Kučerka
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University Bratislava, Bratislava, Slovakia
- *Correspondence: Norbert Kučerka,
| |
Collapse
|
9
|
Põldsalu I, Köksal ES, Gözen I. Mixed fatty acid-phospholipid protocell networks. Phys Chem Chem Phys 2021; 23:26948-26954. [PMID: 34842249 DOI: 10.1039/d1cp03832j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembled membranes composed of both fatty acids and phospholipids are permeable for solutes and structurally stable, which was likely an advantageous combination for the development of primitive cells on the early Earth. Here we report on the solid surface-assisted formation of primitive mixed-surfactant membrane compartments, i.e. model protocells, from multilamellar lipid reservoirs composed of different ratios of fatty acids and phospholipids. Similar to the previously discovered enhancement of model protocell formation on solid substrates, we achieve spontaneous multi-step self-transformation of mixed surfactant reservoirs into closed surfactant containers, interconnected via nanotube networks. Some of the fatty acid-containing compartments in the networks exhibit colony-like growth. We demonstrate that the compartments generated from fatty acid-containing phospholipid membranes feature increased permeability coefficients for molecules in the ambient solution, for fluorescein up to 7 × 10-6 cm s-1 and for RNA up to 3.5 × 10-6 cm s-1. Our findings indicate that surface-assisted autonomous protocell formation and development, starting from mixed amphiphiles, is a plausible scenario for the early stages of the emergence of primitive cells.
Collapse
Affiliation(s)
- Inga Põldsalu
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway.
| | - Elif Senem Köksal
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway.
| | - Irep Gözen
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, 0318 Oslo, Norway. .,Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Oslo, 0315 Oslo, Norway
| |
Collapse
|
10
|
Sakuragi M. Evaluation of the supramolecular structure of drug delivery carriers using synchrotron X-ray scattering. Polym J 2021. [DOI: 10.1038/s41428-021-00533-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
11
|
Goto M, Kazama A, Fukuhara K, Sato H, Tamai N, Ito HO, Matsuki H. Membrane fusion of phospholipid bilayers under high pressure: Spherical and irreversible growth of giant vesicles. Biophys Chem 2021; 277:106639. [PMID: 34171580 DOI: 10.1016/j.bpc.2021.106639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/29/2021] [Accepted: 06/04/2021] [Indexed: 10/21/2022]
Abstract
Membrane fusion of giant vesicles (GVs) for binary bilayers of unsaturated phospholipids, dioleoylphosphatidyl-ethanolamine (DOPE) having an ability to promote membrane fusion, and its homolog dioleoylphosphatidylcholine (DOPC) having an ability to form GV, was investigated under atmospheric and high pressure. While DOPC formed GVs in the presence of inorganic salts with a multivalent metal ion under atmospheric pressure, an equimolar mixture of DOPE and DOPC formed GVs both in the absence and the presence of LaCl3. We examined the change in size and shape of the GVs of this binary mixture in the absence and presence of LaCl3 as a function of time under atmospheric and high pressure. The size and shape of the GVs in the absence of LaCl3 under atmospheric and high pressure and those in the presence of LaCl3 under atmospheric pressure hardly changed with time. By contrast, the GV in the presence of LaCl3 under high pressure gradually changed in the size and shape with time on a time scale of several hours. Namely, the GV became larger than the original GV due to accelerated membrane fusion and its shape became more spherical. This pressure-induced membrane fusion was completely irreversible, and the growth rate was correlated with the applied pressure. The reason for the GV growth by applying pressure was considered on the basis of thermodynamic phase diagrams. We concluded that the growth is attributable to a closer packing of lipid molecules in the bilayer resulting from their preference of smaller volumes under high pressure. Furthermore, the molecular mechanism of the pressure-induced membrane fusion was explored by observing the fusion of two GVs with almost the same size. From their morphological changes, we revealed that the fusion is caused by the actions of Laplace and osmotic pressure.
Collapse
Affiliation(s)
- Masaki Goto
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan
| | - Akira Kazama
- Department of Biological Science and Technology, Faculty of Engineering, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Kensuke Fukuhara
- Department of Biological Science and Technology, Faculty of Engineering, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Honami Sato
- Department of Biological Science and Technology, Faculty of Engineering, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Nobutake Tamai
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan
| | - Hiro-O Ito
- Department of Preventive Dentistry, Division of Oral Science, Graduate School of Biomedical Sciences, Tokushima University, 3-8-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Hitoshi Matsuki
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan.
| |
Collapse
|
12
|
Jiang L, Wang Q, Lei J, Tao K, Huang J, Zhao S, Hu N, Yang J. Mechanism study of how lipid vesicle electroformation is suppressed by the presence of sodium chloride. Colloids Surf B Biointerfaces 2021; 206:111951. [PMID: 34243032 DOI: 10.1016/j.colsurfb.2021.111951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 06/09/2021] [Accepted: 06/26/2021] [Indexed: 10/21/2022]
Abstract
Giant lipid vesicles (GLVs) are usually adopted as models of cell membranes and electroformation is the most commonly used method for GLV formation. However, GLV electroformation are known to be suppressed by the presence of salt and the mechanism is not clear so far. In this paper, the lipid hydration and GLV electroformation were investigated as a function of the concentration of sodium chloride by depositing the lipids on the bottom substrates and top substrates. In addition, the electrohydrodynamic force generated by the electroosmotic flow (EOF) on the lipid phase was calculated with COMSOL Multiphysics. It was found that the mechanisms for the failure of GLV electroformation in salt solutions are: 1) the presence of sodium chloride decreases the membrane permeability to aqueous solution by accelerating the formation of well-packed membranes, suppressing the swelling and detachment of the lipid membranes; 2) the presence of sodium chloride decreased the electrohydrodynamic force by increasing the medium conductivity.
Collapse
Affiliation(s)
- Lihua Jiang
- Chongqing Engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare, Chongqing City Management College, Chongqing 400055, China
| | - Qiong Wang
- Chongqing Engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare, Chongqing City Management College, Chongqing 400055, China; Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400030, China.
| | - Jincan Lei
- Chongqing Engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare, Chongqing City Management College, Chongqing 400055, China
| | - Ke Tao
- Chongqing Engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare, Chongqing City Management College, Chongqing 400055, China
| | - Jing Huang
- Chongqing Engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare, Chongqing City Management College, Chongqing 400055, China
| | - Shixian Zhao
- Chongqing Engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare, Chongqing City Management College, Chongqing 400055, China
| | - Ning Hu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400030, China
| | - Jun Yang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400030, China.
| |
Collapse
|
13
|
Kučerka N, Ermakova E, Dushanov E, Kholmurodov KT, Kurakin S, Želinská K, Uhríková D. Cation-Zwitterionic Lipid Interactions Are Affected by the Lateral Area per Lipid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:278-288. [PMID: 33356308 DOI: 10.1021/acs.langmuir.0c02876] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Interactions of the divalent cations Ca2+ and Mg2+ with the zwitterionic lipid bilayers prepared of a fully saturated dipalmitoylphosphatidylcholine (DPPC) or a di-monounsaturated dioleoylphosphatidylcholine (DOPC) were studied by using the neutron scattering methods and molecular dynamics simulations. The effect on the bilayer structural properties confirms the direct interactions in all cases studied. The changes are observed in the bilayer thickness and lateral area. The extent of these structural changes, moreover, suggests various mechanisms of the cation-lipid interactions. First, we have observed a small difference when studying DPPC bilayers in the gel and fluid phases, with somewhat larger effects in the former case. Second, the hydration proved to be a factor in the case of DOPC bilayers, with the larger effects in the case of less hydrated systems. Most importantly, however, there was a qualitative difference between the results of the fully hydrated DOPC bilayers and the others examined. These observations then prompt us to suggest an interaction model that is plausibly governed by the lateral area of lipid, though affected indirectly also by the hydration level. Namely, when the interlipid distance is small enough to allow for the multiple lipid-ion interactions, the lipid-ion-lipid bridges are formed. The bridges impose strong attractions that increase the order of lipid hydrocarbon chains, resulting in the bilayer thickening. In the other case, when the interlipid distance extends beyond a limiting length corresponding to the area per lipid of ∼65 Å2, Mg2+ and Ca2+ continue to interact with the lipid groups by forming the separate ion-lipid pairs. As the interactions proposed affect the lipid membrane structure in the lateral direction, they may prove to play their role in other mechanisms lying within the membrane multicomponent systems and regulating for example the lipid-peptide-ion interactions.
Collapse
Affiliation(s)
- Norbert Kučerka
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University in Bratislava, 83232 Bratislava, Slovakia
| | | | | | | | - Sergei Kurakin
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
| | - Katarína Želinská
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University in Bratislava, 83232 Bratislava, Slovakia
| | - Daniela Uhríková
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University in Bratislava, 83232 Bratislava, Slovakia
| |
Collapse
|
14
|
Spustova K, Köksal ES, Ainla A, Gözen I. Subcompartmentalization and Pseudo-Division of Model Protocells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2005320. [PMID: 33230918 DOI: 10.1002/smll.202005320] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/15/2020] [Indexed: 06/11/2023]
Abstract
Membrane enclosed intracellular compartments have been exclusively associated with the eukaryotes, represented by the highly compartmentalized last eukaryotic common ancestor. Recent evidence showing the presence of membranous compartments with specific functions in archaea and bacteria makes it conceivable that the last universal common ancestor and its hypothetical precursor, the protocell, may have exhibited compartmentalization. To the authors' knowledge, there are no experimental studies yet that have tested this hypothesis. They report on an autonomous subcompartmentalization mechanism for protocells which results in the transformation of initial subcompartments to daughter protocells. The process is solely determined by the fundamental materials properties and interfacial events, and does not require biological machinery or chemical energy supply. In the light of the authors' findings, it is proposed that similar events may have taken place under early Earth conditions, leading to the development of compartmentalized cells and potentially, primitive division.
Collapse
Affiliation(s)
- Karolina Spustova
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, Oslo, 0318, Norway
| | - Elif Senem Köksal
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, Oslo, 0318, Norway
| | - Alar Ainla
- International Iberian Nanotechnology Laboratory, Braga, 4715-330, Portugal
| | - Irep Gözen
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, Oslo, 0318, Norway
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, 0315, Norway
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden
| |
Collapse
|
15
|
Nakata S, Yamaguchi Y, Fukuhara K, Hishida M, Kitahata H, Katsumoto Y, Umino Y, Denda M, Kumazawa N. Characteristic responses of a 1,2-dioleoyl-sn-glycero-3-phosphocholine molecular layer to monovalent and divalent metal cations. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
16
|
Köksal ES, Liese S, Xue L, Ryskulov R, Viitala L, Carlson A, Gözen I. Rapid Growth and Fusion of Protocells in Surface-Adhered Membrane Networks. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002529. [PMID: 32776465 DOI: 10.1002/smll.202002529] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/26/2020] [Indexed: 06/11/2023]
Abstract
Elevated temperatures might have promoted the nucleation, growth, and replication of protocells on the early Earth. Recent reports have shown evidence that moderately high temperatures not only permit protocell assembly at the origin of life, but can have actively supported it. Here, the fast nucleation and growth of vesicular compartments from autonomously formed lipid networks on solid surfaces, induced by a moderate increase in temperature, are shown. Branches of the networks, initially consisting of self-assembled interconnected nanotubes, rapidly swell into microcompartments which can spontaneously encapsulate RNA fragments. The increase in temperature further causes fusion of adjacent network-connected compartments, resulting in the redistribution of the RNA. The experimental observations and the mathematical model indicate that the presence of nanotubular interconnections between protocells facilitates the fusion process.
Collapse
Affiliation(s)
- Elif S Köksal
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, Oslo, 0318, Norway
| | - Susanne Liese
- Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, 0315, Norway
| | - Lin Xue
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, Oslo, 0318, Norway
| | - Ruslan Ryskulov
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden
| | - Lauri Viitala
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden
| | - Andreas Carlson
- Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, 0315, Norway
| | - Irep Gözen
- Centre for Molecular Medicine Norway, Faculty of Medicine, University of Oslo, Oslo, 0318, Norway
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, 0315, Norway
| |
Collapse
|
17
|
Fujiwara S, Shoji K, Watanabe C, Kawano R, Yanagisawa M. Microfluidic Formation of Honeycomb-Patterned Droplets Bounded by Interface Bilayers via Bimodal Molecular Adsorption. MICROMACHINES 2020; 11:mi11070701. [PMID: 32698458 PMCID: PMC7407938 DOI: 10.3390/mi11070701] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/14/2020] [Accepted: 07/16/2020] [Indexed: 01/02/2023]
Abstract
Assembled water-in-oil droplets bounded by lipid bilayers are used in synthetic biology as minimal models of cell tissue. Microfluidic devices successfully generate monodispersed droplets and assemble them via droplet interface bilayesr (DIB) formation. However, a honeycomb pattern of DIB-bounded droplets, similar to epithelial tissues, remains unrealized because the rapid DIB formation between the droplets hinders their ability to form the honeycomb pattern. In this paper, we demonstrate the microfluidic formation of a honeycomb pattern of DIB-bounded droplets using two surfactants with different adsorption rates on the droplet surface. A non-DIB forming surfactant (sorbitan monooleate, Span 80) was mixed with a lipid (1,2-dioleoyl-sn-glycero-3-phosphocholine, PC), whose adsorption rate on the droplet surface and saturated interfacial tension were lower than those of Span 80. By changing the surfactant composition, we established the conditions under which the droplets initially form a honeycomb pattern and subsequently adhere to each other via DIB formation to minimize the interfacial energy. In addition, the reconstituted membrane protein nanopores at the DIBs were able to transport molecules. This new method, using the difference in the adsorption rates of two surfactants, allows the formation of a honeycomb pattern of DIB-bounded droplets in a single step, and thus facilitates research using DIB-bounded droplet assemblies.
Collapse
Affiliation(s)
- Shougo Fujiwara
- Komaba Institute for Science, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan; (S.F.); (C.W.)
- Department of Applied Physics, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan
| | - Kan Shoji
- Department of Biotechnology and Life Science., Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan; (K.S.); (R.K.)
- Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan
| | - Chiho Watanabe
- Komaba Institute for Science, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan; (S.F.); (C.W.)
| | - Ryuji Kawano
- Department of Biotechnology and Life Science., Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan; (K.S.); (R.K.)
| | - Miho Yanagisawa
- Komaba Institute for Science, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan; (S.F.); (C.W.)
- Department of Basic Science, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan
- Correspondence: ; Tel.: +81-3-5465-7302
| |
Collapse
|
18
|
Oda A, Watanabe C, Aoki N, Yanagisawa M. Liposomal adhesion via electrostatic interactions and osmotic deflation increase membrane tension and lipid diffusion coefficient. SOFT MATTER 2020; 16:4549-4554. [PMID: 32364199 DOI: 10.1039/d0sm00416b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Membrane adhesion is a ubiquitous phenomenon in cells and is related to various biological events such as migration, morphogenesis, and differentiation. To understand the physicochemical aspects of membrane adhesion, liposome-liposome adhesion and liposome-substrate adhesion have been studied. Although membrane adhesion has been shown to increase membrane tension and inhibit lipid diffusion, the relationship between these changes and the degree of membrane adhesion have not been quantified. Here, we analyzed the dependence of membrane tension and lipid diffusion on the degree of membrane adhesion, i.e., area fraction of the adherent region. For this purpose, we developed a simple method to prepare adhered liposomes by simple electrostatic interactions between the membranes and by osmotic deflation. We found that the membrane tension of the adhered liposomes increases slightly with an increase in the area fraction of the adherent region. In addition, the lipid diffusion coefficient of the adhered liposomes is larger than that of isolated liposomes, which is consistent with the theoretical prediction. The analysis provides a framework to understand the correlation between cell adhesion and bio-membrane properties such as membrane tension and molecular diffusion.
Collapse
Affiliation(s)
- Atsushi Oda
- Department of Applied Physics, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan
| | - Chiho Watanabe
- Komaba Institute for Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan.
| | - Natsumi Aoki
- Department of Applied Physics, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan
| | - Miho Yanagisawa
- Komaba Institute for Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan. and Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro, Tokyo 153-8902, Japan
| |
Collapse
|
19
|
Köksal ES, Liese S, Kantarci I, Olsson R, Carlson A, Gözen I. Nanotube-Mediated Path to Protocell Formation. ACS NANO 2019; 13:6867-6878. [PMID: 31177769 DOI: 10.1021/acsnano.9b01646] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cellular compartments are membrane-enclosed, spatially distinct microenvironments that confine and protect biochemical reactions in the biological cell. On the early Earth, the autonomous formation of compartments is thought to have led to the encapsulation of nucleotides, thereby satisfying a starting condition for the emergence of life. Recently, surfaces have come into focus as potential platforms for the self-assembly of prebiotic compartments, as significantly enhanced vesicle formation was reported in the presence of solid interfaces. The detailed mechanism of such formation at the mesoscale is still under discussion. We report here on the spontaneous transformation of solid-surface-adhered lipid deposits to unilamellar membrane compartments through a straightforward sequence of topological changes, proceeding via a network of interconnected lipid nanotubes. We show that this transformation is entirely driven by surface-free energy minimization and does not require hydrolysis of organic molecules or external stimuli such as electrical currents or mechanical agitation. The vesicular structures take up and encapsulate their external environment during formation and can subsequently separate and migrate upon exposure to hydrodynamic flow. This may link the self-directed transition from weakly organized bioamphiphile assemblies on solid surfaces to protocells with secluded internal contents.
Collapse
Affiliation(s)
- Elif S Köksal
- Centre for Molecular Medicine Norway, Faculty of Medicine , University of Oslo , 0318 Oslo , Norway
| | - Susanne Liese
- Department of Chemistry, Faculty of Mathematics and Natural Sciences , University of Oslo , 0315 Oslo , Norway
| | - Ilayda Kantarci
- Centre for Molecular Medicine Norway, Faculty of Medicine , University of Oslo , 0318 Oslo , Norway
| | - Ragni Olsson
- Centre for Molecular Medicine Norway, Faculty of Medicine , University of Oslo , 0318 Oslo , Norway
| | - Andreas Carlson
- Department of Chemistry, Faculty of Mathematics and Natural Sciences , University of Oslo , 0315 Oslo , Norway
| | - Irep Gözen
- Centre for Molecular Medicine Norway, Faculty of Medicine , University of Oslo , 0318 Oslo , Norway
- Department of Mathematics, Faculty of Mathematics and Natural Sciences , University of Oslo , 0315 Oslo , Norway
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , SE-412 96 Göteborg , Sweden
| |
Collapse
|
20
|
Gupta A, Gözen I, Taylor M. A cellular automaton for modeling non-trivial biomembrane ruptures. SOFT MATTER 2019; 15:4178-4186. [PMID: 31062781 DOI: 10.1039/c8sm02032a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel cellular automaton (CA) for simulating biological membrane rupture is proposed. Constructed via simple rules governing deformation, tension, and fracture, the CA incorporates ideas from standard percolation models and bond-based fracture methods. The model is demonstrated by comparing simulations with experimental results of a double bilayer lipid membrane expanding on a solid substrate. Results indicate that the CA can capture non-trivial rupture morphologies such as floral patterns and the saltatory dynamics of fractal avalanches observed in experiments. Moreover, the CA provides insight into the poorly understood role of inter-layer adhesion, supporting the hypothesis that the density of adhesion sites governs rupture morphology.
Collapse
Affiliation(s)
- Abhay Gupta
- Department of Mechanical Engineering, Santa Clara University, Santa Clara, California, USA.
| | | | | |
Collapse
|
21
|
Maktabi S, Schertzer JW, Chiarot PR. Dewetting-induced formation and mechanical properties of synthetic bacterial outer membrane models (GUVs) with controlled inner-leaflet lipid composition. SOFT MATTER 2019; 15:3938-3948. [PMID: 31011738 PMCID: PMC6647036 DOI: 10.1039/c9sm00223e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The double-membrane cellular envelope of Gram-negative bacteria enables them to endure harsh environments and represents a barrier to many clinically available antibiotics. The outer membrane (OM) is exposed to the environment and is the first point of contact involved in bacterial processes such as signaling, pathogenesis, and motility. As in the cytoplasmic membrane, the OM in Gram-negative bacteria has a phospholipid-rich inner leaflet and an outer leaflet that is predominantly composed of lipopolysaccharide (LPS). We report on a microfluidic technique for fabricating monodisperse asymmetric giant unilamellar vesicles (GUVs) possessing the Gram-negative bacterial OM lipid composition. Our continuous microfluidic fabrication technique generates 50-150 μm diameter water-in-oil-in-water double emulsions at high-throughput. The water-oil and oil-water interfaces facilitate the self-assembly of phospholipid and LPS molecules to create the inner and outer leaflets of the lipid bilayer, respectively. The double emulsions have ultrathin oil shells, which minimizes the amount of residual organic solvent that remains trapped between the leaflets of the GUV membrane. An extraction process by ethanol and micropipette aspiration of the ultrathin oil shells triggers an adhesive interaction between the two lipid monolayers assembled on the water-oil and oil-water interfaces (i.e., dewetting transition), forcing them to contact and form a lipid bilayer membrane. The effect of different inner-leaflet lipid compositions on the emulsion/vesicle stability and the dewetting transition is investigated. We also report on the values for bending and area expansion moduli of synthetic asymmetric model membranes with lipid composition/architecture that is physiologically relevant to the OM in Pseudomonas aeruginosa bacteria.
Collapse
Affiliation(s)
- Sepehr Maktabi
- Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY, USA.
| | | | | |
Collapse
|
22
|
Dimova R. Giant Vesicles and Their Use in Assays for Assessing Membrane Phase State, Curvature, Mechanics, and Electrical Properties. Annu Rev Biophys 2019; 48:93-119. [DOI: 10.1146/annurev-biophys-052118-115342] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Giant unilamellar vesicles represent a promising and extremely useful model biomembrane system for systematic measurements of mechanical, thermodynamic, electrical, and rheological properties of lipid bilayers as a function of membrane composition, surrounding media, and temperature. The most important advantage of giant vesicles over other model membrane systems is that the membrane responses to external factors such as ions, (macro)molecules, hydrodynamic flows, or electromagnetic fields can be directly observed under the microscope. Here, we briefly review approaches for giant vesicle preparation and describe several assays used for deducing the membrane phase state and measuring a number of material properties, with further emphasis on membrane reshaping and curvature.
Collapse
Affiliation(s)
- Rumiana Dimova
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
| |
Collapse
|
23
|
Effects of mono- and di-valent metal cations on the morphology of lipid vesicles. Chem Phys Lipids 2018; 217:19-28. [PMID: 30253127 DOI: 10.1016/j.chemphyslip.2018.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/09/2018] [Accepted: 09/18/2018] [Indexed: 12/22/2022]
Abstract
Lipid vesicles are an attractive model membrane experimental platform that is widely used in a biological context. The stability of vesicles can affect their performance and depends on various experimental conditions. How bio-related ions affect vesicle morphology is poorly understood in some cases. Herein, we investigated changes in vesicle morphology influenced by cation in the static and flowing environments. The effects of different mono- and di-valent metal cations on the morphology of lipid vesicles were systematically studied using the various techniques. The results showed that divalent cations caused significant aggregation or fusion of lipid vesicles, but monovalent cations had little effect on the vesicle morphology. Cation binding increased the net surface potential of vesicles, leading to changes in the zeta potential. The same qualitative kinetics were observed for cations that had the same valence at the same ionic strength. However, different types of cations gave different quantitative effects. The order of the ability to destroy the vesicle morphology was Cu2+ > Mg2+ > Ca2+ > Na+ > K+. These results are of practical value in the use of lipid vesicles as a bionic model, and help to shed light on the role of ions at membrane surfaces and interfaces.
Collapse
|
24
|
Methods of reconstitution to investigate membrane protein function. Methods 2018; 147:126-141. [DOI: 10.1016/j.ymeth.2018.02.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 02/13/2018] [Indexed: 02/06/2023] Open
|
25
|
A reverse-phase method revisited: Rapid high-yield preparation of giant unilamellar vesicles (GUVs) using emulsification followed by centrifugation. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
26
|
Volpe Bossa G, Souza TPD, May S. Adhesion of like-charged lipid vesicles induced by rod-like counterions. SOFT MATTER 2018; 14:3935-3944. [PMID: 29736542 DOI: 10.1039/c8sm00559a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Adhesion of electrically charged lipid vesicles and subsequent formation of multi-vesicle aggregates can be induced by multivalent rod-like counterions. Motivated by recent experimental observations we calculate the equilibrium conformation of two identical vesicles that adhere onto each other. The degree of adhesion reflects the competition between predominantly electrostatic attraction and vesicle bending. Our model assumes the enclosed vesicle volume is allowed to freely adjust and the area of the vesicle membrane is fixed and remains constant. We describe the electrostatic attraction, which arises from the bridging of the rod-like counterions between the two like-charged vesicles, using a recently developed mean-field theory. Bending fluctuation-induced entropic repulsion, depletion forces between the apposed vesicle membranes induced by the rod-like counterions, and van der Waals attraction between the vesicles are estimated to induce only minor shifts in the equilibrium vesicle conformation. Our model predicts the dependence of vesicle adhesion (including its onset) exclusively from material or molecular parameters such as vesicle size and charge, bending stiffness of the membrane, effective length and net charge of the added rod-like counterions, as well as concentrations of rod-like counterions and additional salt content. We demonstrate that the demixing of charged lipids between the adhesion region and the uncomplexed parts of the vesicles has only a minor influence on the degree of adhesion. Our predictions are in qualitative agreement with recent experimental findings.
Collapse
Affiliation(s)
- Guilherme Volpe Bossa
- Department of Physics, North Dakota State University, Fargo North Dakota 58108-6050, USA.
| | | | | |
Collapse
|
27
|
Abstract
Patch-clamp electrophysiology is the standard technique used for the high-resolution functional measurements on ion channels. While studies using patch clamp are commonly carried out following ion channel expression in a heterologous system such as Xenopus oocytes or tissue culture cells, these studies can also be carried out using ion channels reconstituted into lipid vesicles. In this chapter, we describe the methodology for reconstituting ion channels into liposomes and the procedure for the generation of unilamellar blisters from these liposomes that are suitable for patch clamp. Here, we focus on the bacterial K+ channel KcsA, although the methodologies described in this chapter should be applicable for the functional analysis of other ion channels.
Collapse
Affiliation(s)
- Kimberly Matulef
- Program in Chemical Biology, Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Mail Code L334, Portland, OR, 97239, USA
| | - Francis I Valiyaveetil
- Department of Physiology and Pharmacology, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Mail Code L334, Portland, OR, 97239, USA.
| |
Collapse
|
28
|
Wang Q, Li W, Hu N, Chen X, Fan T, Wang Z, Yang Z, Cheney MA, Yang J. Ion concentration effect (Na + and Cl -) on lipid vesicle formation. Colloids Surf B Biointerfaces 2017; 155:287-293. [PMID: 28437754 DOI: 10.1016/j.colsurfb.2017.04.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/08/2017] [Accepted: 04/11/2017] [Indexed: 01/14/2023]
Abstract
Lipid vesicle formation is known to be suppressed in salt solutions, but the mechanism of this phenomenon remains unclear. In order to better understand this issue, the effect of salt concentrations (0-800mM) of sodium chloride on the behavior of L-α-phosphatidylcholine (PC) in aqueous solution was investigated in this work. The results showed that fusion among vesicles, micelles and bilayers may be essential for vesicle formation. With addition of ions and an increase in ion concentration, the lipids became constrained in lateral movement and packed increasingly tightly. The resulted hard supported phospholipid bilayers (SPBs) were thus more difficult to detach from the substrate to form vesicles. These phenomena were tried to be explained at molecular level. Hydrophobic effect is the original cause of lipid vesicle formation, which in fact is absence of attraction between the involved substances. That is to say, the stronger the 3D network was bounded in the medium, the stronger the hydrophobic repulsion on the lipids would be. This might be one reason for the suppression of vesicle formation in salt solution.
Collapse
Affiliation(s)
- Qiong Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing Engineering Research Center of Medical Electronics Technology (Chongqing University), Bioengineering College, Chongqing University, Chongqing, 400030, China
| | - Wenman Li
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing Engineering Research Center of Medical Electronics Technology (Chongqing University), Bioengineering College, Chongqing University, Chongqing, 400030, China
| | - Ning Hu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing Engineering Research Center of Medical Electronics Technology (Chongqing University), Bioengineering College, Chongqing University, Chongqing, 400030, China.
| | - Xi Chen
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing Engineering Research Center of Medical Electronics Technology (Chongqing University), Bioengineering College, Chongqing University, Chongqing, 400030, China
| | - Ting Fan
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing Engineering Research Center of Medical Electronics Technology (Chongqing University), Bioengineering College, Chongqing University, Chongqing, 400030, China
| | - Zhenyu Wang
- Department of Biomedical Engineering, Chongqing Medical University, Chongqing, 400016, China
| | - Zhong Yang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Marcos A Cheney
- Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, MD, 21853, USA
| | - Jun Yang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Chongqing Engineering Research Center of Medical Electronics Technology (Chongqing University), Bioengineering College, Chongqing University, Chongqing, 400030, China.
| |
Collapse
|
29
|
Taylor M, Gözen I, Patel S, Jesorka A, Bertoldi K. Peridynamic Modeling of Ruptures in Biomembranes. PLoS One 2016; 11:e0165947. [PMID: 27829001 PMCID: PMC5102442 DOI: 10.1371/journal.pone.0165947] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 10/20/2016] [Indexed: 11/18/2022] Open
Abstract
We simulate the formation of spontaneous ruptures in supported phospholipid double bilayer membranes, using peridynamic modeling. Experiments performed on spreading double bilayers typically show two distinct kinds of ruptures, floral and fractal, which form spontaneously in the distal (upper) bilayer at late stages of double bilayer formation on high energy substrates. It is, however, currently unresolved which factors govern the occurrence of either rupture type. Variations in the distance between the two bilayers, and the occurrence of interconnections (“pinning sites”) are suspected of contributing to the process. Our new simulations indicate that the pinned regions which form, presumably due to Ca2+ ions serving as bridging agent between the distal and the proximal bilayer, act as nucleation sites for the ruptures. Moreover, assuming that the pinning sites cause a non-zero shear modulus, our simulations also show that they change the rupture mode from floral to fractal. At zero shear modulus the pores appear to be circular, subsequently evolving into floral pores. With increasing shear modulus the pore edges start to branch, favoring fractal morphologies. We conclude that the pinning sites may indirectly determine the rupture morphology by contributing to shear stress in the distal membrane.
Collapse
Affiliation(s)
- Michael Taylor
- Department of Mechanical Engineering, Santa Clara University, Santa Clara, California, United States of America
| | - Irep Gözen
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America
| | - Samir Patel
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America
| | - Aldo Jesorka
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Katia Bertoldi
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America
- * E-mail:
| |
Collapse
|
30
|
Li Q, Wang X, Ma S, Zhang Y, Han X. Electroformation of giant unilamellar vesicles in saline solution. Colloids Surf B Biointerfaces 2016; 147:368-375. [DOI: 10.1016/j.colsurfb.2016.08.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/02/2016] [Accepted: 08/15/2016] [Indexed: 12/22/2022]
|
31
|
Jørgensen IL, Kemmer GC, Pomorski TG. Membrane protein reconstitution into giant unilamellar vesicles: a review on current techniques. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2016; 46:103-119. [DOI: 10.1007/s00249-016-1155-9] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 06/18/2016] [Accepted: 07/03/2016] [Indexed: 12/11/2022]
|
32
|
Natali A, Gruber JM, Dietzel L, Stuart MCA, van Grondelle R, Croce R. Light-harvesting Complexes (LHCs) Cluster Spontaneously in Membrane Environment Leading to Shortening of Their Excited State Lifetimes. J Biol Chem 2016; 291:16730-9. [PMID: 27252376 DOI: 10.1074/jbc.m116.730101] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Indexed: 11/06/2022] Open
Abstract
The light reactions of photosynthesis, which include light-harvesting and charge separation, take place in the amphiphilic environment of the thylakoid membrane. The light-harvesting complex II (LHCII) is the main responsible for light absorption in plants and green algae and is involved in photoprotective mechanisms that regulate the amount of excited states in the membrane. The dual function of LHCII has been extensively studied in detergent micelles, but recent results have indicated that the properties of this complex differ in a lipid environment. In this work we checked these suggestions by studying LHCII in liposomes. By combining bulk and single molecule measurements, we monitored the fluorescence characteristics of liposomes containing single complexes up to densely packed proteoliposomes. We show that the natural lipid environment per se does not alter the properties of LHCII, which for single complexes remain very similar to that in detergent. However, we show that LHCII has the strong tendency to cluster in the membrane and that protein interactions and the extent of crowding modulate the lifetimes of the excited state in the membrane. Finally, the presence of LHCII monomers at low concentrations of complexes per liposome is discussed.
Collapse
Affiliation(s)
- Alberto Natali
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - J Michael Gruber
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - Lars Dietzel
- Institute of Molecular Biosciences, Goethe-University Frankfurt/M, 60438 Frankfurt, Germany, and
| | - Marc C A Stuart
- Electron Microscopy, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Rienk van Grondelle
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - Roberta Croce
- From the Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands,
| |
Collapse
|
33
|
López Mora N, Hansen JS, Gao Y, Ronald AA, Kieltyka R, Malmstadt N, Kros A. Preparation of size tunable giant vesicles from cross-linked dextran(ethylene glycol) hydrogels. Chem Commun (Camb) 2014; 50:1953-5. [PMID: 24407820 DOI: 10.1039/c3cc49144g] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We present a novel chemically cross-linked dextran-poly(ethylene glycol) hydrogel substrate for the preparation of dense vesicle suspensions under physiological ionic strength conditions. These vesicles can be easily diluted for individual study. Modulating the degree of cross-linking within the hydrogel network results in tuning of the vesicle size distribution.
Collapse
Affiliation(s)
- Néstor López Mora
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands.
| | | | | | | | | | | | | |
Collapse
|
34
|
Wheaten SA, Lakshmanan A, Almeida PF. Statistical analysis of peptide-induced graded and all-or-none fluxes in giant vesicles. Biophys J 2014; 105:432-43. [PMID: 23870264 DOI: 10.1016/j.bpj.2013.05.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 05/27/2013] [Accepted: 05/31/2013] [Indexed: 10/26/2022] Open
Abstract
Antimicrobial, cytolytic, and cell-penetrating peptides induce pores or perturbations in phospholipid membranes that result in fluxes of dyes into or out of lipid vesicles. Here we examine the fluxes induced by four of these membrane-active peptides in giant unilamellar vesicles. The type of flux is determined from the modality of the distributions of vesicles as a function of their dye content using the statistical Hartigan dip test. Graded and all-or-none fluxes correspond to unimodal and bimodal distributions, respectively. To understand how these distributions arise, we perform Monte Carlo simulations of peptide-induced dye flux into vesicles using a very simple model. The modality of the distributions depends on the rate constants of pore opening and closing, and dye flux. If the rate constants of pore opening and closing are both much smaller than that of dye flux through the pore, all-or-none influx occurs. However, if one of them, especially the rate constant for pore opening, increases significantly relative to the flux rate constant, the process becomes graded. In the experiments, we find that the flux type is the same in giant and large vesicles, for all peptides except one. But this one exception indicates that the flux type cannot be used to unambiguously predict the mechanism of membrane permeabilization by the peptides.
Collapse
Affiliation(s)
- Sterling A Wheaten
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Wilmington, North Carolina, USA
| | | | | |
Collapse
|
35
|
Takakura K, Yamamoto T, Kurihara K, Toyota T, Ohnuma K, Sugawara T. Spontaneous transformation from micelles to vesicles associated with sequential conversions of comprising amphiphiles within assemblies. Chem Commun (Camb) 2014; 50:2190-2. [PMID: 24429723 DOI: 10.1039/c3cc47786j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A morphological transformation from hybrid micelles to giant vesicles was observed in aqueous dispersion associated with formation of a double-chained amphiphile as a result of the migration of dodecylamine from the amphiphilic imine to the amphiphilic aldehyde within the hydrophobic environment of amphiphilic aggregates.
Collapse
Affiliation(s)
- Katsuto Takakura
- Department of Chemistry and Biochemistry, Suzuka National College of Technology, Shiroko-cho, Suzuka, Mie 510-0294, Japan.
| | | | | | | | | | | |
Collapse
|
36
|
Divalent Metal Cations in DNA–Phospholipid Binding. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-12-418698-9.00004-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
37
|
Mertins O, Dimova R. Insights on the interactions of chitosan with phospholipid vesicles. Part II: Membrane stiffening and pore formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14552-14559. [PMID: 24168435 DOI: 10.1021/la4032199] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The interactions between the polysaccharide chitosan and phospholipids are studied using giant unilamellar vesicles (GUVs). We explore both bare GUVs incubated in chitosan solution post vesicle formation and GUVs prepared using a reverse-phase method where the polymer is adsorbed on both sides of the membrane leaflet. The fluctuations of the vesicle membrane are significantly reduced in the presence of chitosan as characterized by the bending rigidity, which increases with chitosan concentration denoting physical restrictions imposed to the bilayer as a consequence of the interaction with the polysaccharide. In the absence of chitosan, the rigidity of the bare phosphatidylcholine vesicles is also observed to increase (about 3-fold) upon the incorporation of a small fraction (10 mol %) of phosphatidylglycerol. Pore formation caused by chitosan is evidenced by loss of optical contrast of the giant vesicles denoting exchange between internal and external solutions through the pores. Our study provides evidence for the potential of chitosan to affect the bilayer permeability and to disrupt negatively charged membranes as well as to promote adhesiveness of vesicles on glass surfaces.
Collapse
Affiliation(s)
- Omar Mertins
- Department of Theory and Bio-Systems, Max Planck Institute of Colloids and Interfaces , Science Park Golm, 14424 Potsdam, Germany
| | | |
Collapse
|
38
|
Kaszás N, Bozó T, Budai M, Gróf P. Ciprofloxacin Encapsulation Into Giant Unilamellar Vesicles: Membrane Binding and Release. J Pharm Sci 2013; 102:694-705. [DOI: 10.1002/jps.23410] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
39
|
|
40
|
Dimova R. Membrane Electroporation in High Electric Fields. ADVANCES IN ELECTROCHEMICAL SCIENCES AND ENGINEERING 2011. [DOI: 10.1002/9783527644117.ch7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
41
|
Hatakenaka R, Takagi S, Matsumoto Y. Orientation and internal flow of a vesicle in tank-treading motion in shear flow. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:026324. [PMID: 21929107 DOI: 10.1103/physreve.84.026324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Indexed: 05/31/2023]
Abstract
Deformation, orientation and internal flow of lipid bilayer vesicles in linear shear flows are investigated using phase contrast microscopy. We construct a rotating-cylinder apparatus, which can generate a linear shear flow with constant shear rates. Vesicles are prepared from 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) by the gentle hydration method. When visualizing internal flows, polystyrene tracer particles are mixed with the hydration water solution. In our observation, vesicles deform to steady ellipsoidal shapes and show constant orientations given by θ(i), which is the angle between the major axis and the flow direction. The tracer particles inside a vesicle rotate around the center of the vesicle along ellipsoidal orbits, which are homothetic to the shape of the vesicle. It is shown that the relationship between θ(i) and the swelling ratio (volume/surface ratio) S(w) agrees quantitatively with the experimental result of Abkarian et al. [Biophys. J.89, 1055 (2005)], which was obtained with vesicles in wall-bounded shear flows. It also agrees with a theoretical analysis of Keller and Skalak [J. Fluid Mech.120, 27 (1982)] and other numerical simulations. It is also shown that angular velocities of the particles near the membrane change periodically and agree quantitatively with the experimental result for the motion of a particle adhering to the membrane of a tank-treading vesicle [Kantsler and Steinberg, Phys. Rev. Lett.95, 258101 (2005)]. A statistical analysis indicates that the velocity of the internal fluid close to the membrane is not constant along the circumference, which implies the possibility of a three-dimensional flow field of the lipid molecules or an apparent stretching motion of the membrane by the effect of hidden surface area due to thermal fluctuation.
Collapse
Affiliation(s)
- Ryuta Hatakenaka
- Dept. of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | | | | |
Collapse
|
42
|
Lengyel A, Uhríková D, Klacsová M, Balgavý P. DNA condensation and its thermal stability influenced by phospholipid bilayer and divalent cations. Colloids Surf B Biointerfaces 2011; 86:212-7. [DOI: 10.1016/j.colsurfb.2011.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 03/30/2011] [Accepted: 04/01/2011] [Indexed: 10/18/2022]
|
43
|
Szekely O, Steiner A, Szekely P, Amit E, Asor R, Tamburu C, Raviv U. The structure of ions and zwitterionic lipids regulates the charge of dipolar membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7419-7438. [PMID: 21598965 DOI: 10.1021/la200264s] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In pure water, zwitterionic lipids form lamellar phases with an equilibrium water gap on the order of 2 to 3 nm as a result of the dominating van der Waals attraction between dipolar bilayers. Monovalent ions can swell those neutral lamellae by a small amount. Divalent ions can adsorb onto dipolar membranes and charge them. Using solution X-ray scattering, we studied how the structure of ions and zwitterionic lipids regulates the charge of dipolar membranes. We found that unlike monovalent ions that weakly interact with all of the examined dipolar membranes, divalent and trivalent ions adsorb onto membranes containing lipids with saturated tails, with an association constant on the order of ∼10 M(-1). One double bond in the lipid tail is sufficient to prevent divalent ion adsorption. We suggest that this behavior is due to the relatively loose packing of lipids with unsaturated tails that increases the area per lipid headgroup, enabling their free rotation. Divalent ion adsorption links two lipids and limits their free rotation. The ion-dipole interaction gained by the adsorption of the ions onto unsaturated membranes is insufficient to compensate for the loss of headgroup free-rotational entropy. The ion-dipole interaction is stronger for cations with a higher valence. Nevertheless, polyamines behave as monovalent ions near dipolar interfaces in the sense that they interact weakly with the membrane surface, whereas in the bulk their behavior is similar to that of multivalent cations. Advanced data analysis and comparison with theory provide insight into the structure and interactions between ion-induced regulated charged interfaces. This study models biologically relevant interactions between cell membranes and various ions and the manner in which the lipid structure governs those interactions. The ability to monitor these interactions creates a tool for probing systems that are more complex and forms the basis for controlling the interactions between dipolar membranes and charged proteins or biopolymers for encapsulation and delivery applications.
Collapse
Affiliation(s)
- Or Szekely
- The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, 91904 Jerusalem, Israel
| | | | | | | | | | | | | |
Collapse
|
44
|
Heider EC, Barhoum M, Edwards K, Gericke KH, Harris JM. Structural Characterization of Individual Vesicles using Fluorescence Microscopy. Anal Chem 2011; 83:4909-15. [DOI: 10.1021/ac200632h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Emily C. Heider
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Moussa Barhoum
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Kyle Edwards
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Karl-Heinz Gericke
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Joel M. Harris
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| |
Collapse
|
45
|
Gözen I, Dommersnes P, Czolkos I, Jesorka A, Lobovkina T, Orwar O. Fractal avalanche ruptures in biological membranes. NATURE MATERIALS 2010; 9:908-912. [PMID: 20935656 DOI: 10.1038/nmat2854] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Accepted: 08/11/2010] [Indexed: 05/30/2023]
Abstract
Bilayer membranes envelope cells as well as organelles, and constitute the most ubiquitous biological material found in all branches of the phylogenetic tree. Cell membrane rupture is an important biological process, and substantial rupture rates are found in skeletal and cardiac muscle cells under a mechanical load. Rupture can also be induced by processes such as cell death, and active cell membrane repair mechanisms are essential to preserve cell integrity. Pore formation in cell membranes is also at the heart of many biomedical applications such as in drug, gene and short interfering RNA delivery. Membrane rupture dynamics has been studied in bilayer vesicles under tensile stress, which consistently produce circular pores. We observed very different rupture mechanics in bilayer membranes spreading on solid supports: in one instance fingering instabilities were seen resulting in floral-like pores and in another, the rupture proceeded in a series of rapid avalanches causing fractal membrane fragmentation. The intermittent character of rupture evolution and the broad distribution in avalanche sizes is consistent with crackling-noise dynamics. Such noisy dynamics appear in fracture of solid disordered materials, in dislocation avalanches in plastic deformations and domain wall magnetization avalanches. We also observed similar fractal rupture mechanics in spreading cell membranes.
Collapse
Affiliation(s)
- Irep Gözen
- Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
| | | | | | | | | | | |
Collapse
|
46
|
Vesicles with charged domains. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1338-47. [DOI: 10.1016/j.bbamem.2009.12.023] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2009] [Revised: 12/15/2009] [Accepted: 12/22/2009] [Indexed: 01/29/2023]
|
47
|
Shaklee PM, Semrau S, Malkus M, Kubick S, Dogterom M, Schmidt T. Protein incorporation in giant lipid vesicles under physiological conditions. Chembiochem 2010; 11:175-9. [PMID: 20013981 DOI: 10.1002/cbic.200900669] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Paige M Shaklee
- Physics of Life Processes, Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA, Leiden, The Netherlands.
| | | | | | | | | | | |
Collapse
|
48
|
Messina PV, Ruso JM, Prieto G, Fernández-Leyes MD, Schulz PC, Sarmiento F. Ca2+- and Mg2+-induced molecular interactions in a dehydrocholic acid/didodecyldimethylammonium bromide mixed monolayer. Colloid Polym Sci 2010. [DOI: 10.1007/s00396-009-2170-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
49
|
Gillmor SD, Heetderks JJ, Weiss PS. Temperature-Dependent Vesicle Response to Surface Topography. J Phys Chem B 2009; 113:11490-5. [DOI: 10.1021/jp901428c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Susan D. Gillmor
- Department of Chemistry, George Washington University, 725 21st Street, N.W., Washington, DC 20052, Departments of Chemistry and Physics, The Pennsylvania State University, 104 Davey Laboratory, University Park, Pennsylvania 16802-6300
| | - Julia J. Heetderks
- Department of Chemistry, George Washington University, 725 21st Street, N.W., Washington, DC 20052, Departments of Chemistry and Physics, The Pennsylvania State University, 104 Davey Laboratory, University Park, Pennsylvania 16802-6300
| | - Paul S. Weiss
- Department of Chemistry, George Washington University, 725 21st Street, N.W., Washington, DC 20052, Departments of Chemistry and Physics, The Pennsylvania State University, 104 Davey Laboratory, University Park, Pennsylvania 16802-6300
| |
Collapse
|
50
|
Affiliation(s)
- Stefan Balaz
- Department of Pharmaceutical Sciences, College of Pharmacy, North Dakota State University, Fargo, North Dakota 58105, USA.
| |
Collapse
|