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Kristensen S, Hassan K, Andersen NS, Steiniger F, Kuntsche J. Feasibility of the preparation of cochleate suspensions from naturally derived phosphatidylserines. FRONTIERS IN MEDICAL TECHNOLOGY 2023; 5:1241368. [PMID: 37745179 PMCID: PMC10512065 DOI: 10.3389/fmedt.2023.1241368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 08/17/2023] [Indexed: 09/26/2023] Open
Abstract
Introduction Cochleates are cylindrical particles composed of dehydrated phospholipid bilayers. They are typically prepared by addition of calcium ions to vesicles composed of negatively charged phospholipids such as phosphatidylserines (PS). Due to their high physical and chemical stability, they provide an interesting alternative over other lipid-based drug formulations for example to improve oral bioavailability or to obtain a parenteral sustained-release formulation. Methods In the present study, the feasibility to prepare cochleate suspensions from soy lecithin-derived phosphatidylserines (SPS) was investigated and compared to the "gold standard" dioleoyl-phosphatidylserine (DOPS) cochleates. The SPS lipids covered a large range of purities between 53 and >96% and computer-controlled mixing was evaluated for the preparation of the cochleate suspensions. Electron microscopic investigations were combined with small-angle x-ray diffraction (SAXD) and Laurdan generalized polarization (GP) analysis to characterize particle structure and lipid organization. Results Despite some differences in particle morphology, cochleate suspensions with similar internal lipid structure as DOPS cochleates could be prepared from SPS with high headgroup purity (≥96%). Suspensions prepared from SPS with lower purity still revealed a remarkably high degree of lipid dehydration and well-organized lamellar structure. However, the particle shape was less defined, and the typical cochleate cylinders could only be detected in suspensions prepared with higher amount of calcium ions. Finally, the study proves the feasibility to prepare suspensions of cochleates or cochleate-like particles directly from a calcium salt of soy-PS by dialysis.
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Affiliation(s)
- Søren Kristensen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark
| | - Khadeija Hassan
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark
| | | | - Frank Steiniger
- Center for Electron Microscopy, Jena University Hospital, Jena, Germany
| | - Judith Kuntsche
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark
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2
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Patterning-mediated supramolecular assembly of lipids into nanopalms. iScience 2022; 25:105344. [DOI: 10.1016/j.isci.2022.105344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/04/2022] [Accepted: 10/11/2022] [Indexed: 11/23/2022] Open
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3
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Shuddhodana, Judeh Z. Insights into the mechanism of formation of non-conventional cochleates and its impact on their functional properties. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Alghuthaymi MA, Hassan AA, Kalia A, Sayed El Ahl RMH, El Hamaky AAM, Oleksak P, Kuca K, Abd-Elsalam KA. Antifungal Nano-Therapy in Veterinary Medicine: Current Status and Future Prospects. J Fungi (Basel) 2021; 7:494. [PMID: 34206304 PMCID: PMC8303737 DOI: 10.3390/jof7070494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 12/15/2022] Open
Abstract
The global recognition for the potential of nanoproducts and processes in human biomedicine has given impetus for the development of novel strategies for rapid, reliable, and proficient diagnosis, prevention, and control of animal diseases. Nanomaterials exhibit significant antifungal and antimycotoxin activities against mycosis and mycotoxicosis disorders in animals, as evidenced through reports published over the recent decade and more. These nanoantifungals can be potentially utilized for the development of a variety of products of pharmaceutical and biomedical significance including the nano-scale vaccines, adjuvants, anticancer and gene therapy systems, farm disinfectants, animal husbandry, and nutritional products. This review will provide details on the therapeutic and preventative aspects of nanoantifungals against diverse fungal and mycotoxin-related diseases in animals. The predominant mechanisms of action of these nanoantifungals and their potential as antifungal and cytotoxicity-causing agents will also be illustrated. Also, the other theragnostic applications of nanoantifungals in veterinary medicine will be identified.
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Affiliation(s)
- Mousa A. Alghuthaymi
- Biology Department, Science and Humanities College, Shaqra University, Alquwayiyah 19245, Saudi Arabia;
| | - Atef A. Hassan
- Department of Mycology, Animal Health Research Institute (AHRI), Agriculture Research Center (ARC), 12611 Giza, Egypt; (A.A.H.); (R.M.H.S.E.A.); (A.A.M.E.H.)
| | - Anu Kalia
- Electron Microscopy and Nanoscience Laboratory, Department of Soil Science, College of Agriculture, Punjab Agricultural University, Ludhiana 141004, India
| | - Rasha M. H. Sayed El Ahl
- Department of Mycology, Animal Health Research Institute (AHRI), Agriculture Research Center (ARC), 12611 Giza, Egypt; (A.A.H.); (R.M.H.S.E.A.); (A.A.M.E.H.)
| | - Ahmed A. M. El Hamaky
- Department of Mycology, Animal Health Research Institute (AHRI), Agriculture Research Center (ARC), 12611 Giza, Egypt; (A.A.H.); (R.M.H.S.E.A.); (A.A.M.E.H.)
| | - Patrik Oleksak
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, 50003 Hradec Kralove, Czech Republic;
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, 50003 Hradec Kralove, Czech Republic;
| | - Kamel A. Abd-Elsalam
- Plant Pathology Research Institute, Agricultural Research Center (ARC), 9-Gamaa St., 12619 Giza, Egypt
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5
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Rahnfeld L, Luciani P. Injectable Lipid-Based Depot Formulations: Where Do We Stand? Pharmaceutics 2020; 12:E567. [PMID: 32575406 PMCID: PMC7356974 DOI: 10.3390/pharmaceutics12060567] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/13/2020] [Accepted: 06/15/2020] [Indexed: 01/18/2023] Open
Abstract
The remarkable number of new molecular entities approved per year as parenteral drugs, such as biologics and complex active pharmaceutical ingredients, calls for innovative and tunable drug delivery systems. Besides making these classes of drugs available in the body, injectable depot formulations offer the unique advantage in the parenteral world of reducing the number of required injections, thus increasing effectiveness as well as patient compliance. To date, a plethora of excipients has been proposed to formulate depot systems, and among those, lipids stand out due to their unique biocompatibility properties and safety profile. Looking at the several long-acting drug delivery systems based on lipids designed so far, a legitimate question may arise: How far away are we from an ideal depot formulation? Here, we review sustained release lipid-based platforms developed in the last 5 years, namely oil-based solutions, liposomal systems, in situ forming systems, solid particles, and implants, and we critically discuss the requirements for an ideal depot formulation with respect to the used excipients, biocompatibility, and the challenges presented by the manufacturing process. Finally, we delve into lights and shadows originating from the current setups of in vitro release assays developed with the aim of assessing the translational potential of depot injectables.
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Affiliation(s)
| | - Paola Luciani
- Pharmaceutical Technology Research Group, Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland;
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6
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Shuddhodana, Wong PWK, Judeh Z. Continuous, high-throughput production of artemisinin-loaded supramolecular cochleates using simple off-the-shelf flow focusing device. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110410. [PMID: 31923944 DOI: 10.1016/j.msec.2019.110410] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/16/2019] [Accepted: 11/07/2019] [Indexed: 02/07/2023]
Abstract
Lipid cochleates are gaining increasing interest as drug-carriers. However, their preparation relies on conventional batch processes that are complex, time consuming and lack batch-to-batch reproducibility; presenting a bottleneck for clinical translation. We report an efficient continuous preparation process for artemisinin-loaded cochleates (ART-cochleates) using inexpensive off-the-shelf flow focusing device. By carefully controlling the flow focusing parameters, we showed along with the mechanism that, ART-cochleates of uniform and tuneable size (~180 nm in width and ~1030 nm in length) were obtained with low dispersity (0.18 in width and 0.27 in length), narrow size distribution and high reproducibility compared to the batch process. The device achieved high throughput of 11.5 g/day with ART encapsulation of 64.24 ± 2.5% and loading of 83.37 ± 3.68 mg ART/g of cochleates. Art-cochleates were non-toxic and showed sustained in-vitro release of ART with effective transepithelial permeability across intestinal Caco-2 monolayer (~60% and ~25% transport for pure ART and ART-cochleates, respectively) resulting in better in-vitro bioavailability. The off-the-shelf device is envisioned to be highly promising platform for continuous and high-throughput manufacturing of drug-loaded cochleates in a controlled and reproducible manner. It has potential to enable clinical translation of drug-loaded cochleates with predicable drug release, absorption and bioavailability.
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Affiliation(s)
- Shuddhodana
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore, 62 Nanyang Drive, 637 459, Singapore.
| | - Pooi Wen Kathy Wong
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore, 62 Nanyang Drive, 637 459, Singapore.
| | - Zaher Judeh
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore, 62 Nanyang Drive, 637 459, Singapore.
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7
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Electrostatic shape control of a charged molecular membrane from ribbon to scroll. Proc Natl Acad Sci U S A 2019; 116:22030-22036. [PMID: 31611404 DOI: 10.1073/pnas.1913632116] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bilayers of amphiphiles can organize into spherical vesicles, nanotubes, planar, undulating, and helical nanoribbons, and scroll-like cochleates. These bilayer-related architectures interconvert under suitable conditions. Here, a charged, chiral amphiphile (palmitoyl-lysine, C16-K1) is used to elucidate the pathway for planar nanoribbon to cochleate transition induced by salt (NaCl) concentration. In situ small- and wide-angle X-ray scattering (SAXS/WAXS), atomic force and cryogenic transmission electron microscopies (AFM and cryo-TEM) tracked these transformations over angstrom to micrometer length scales. AFM reveals that the large length (L) to width (W) ratio nanoribbons (L/W > 10) convert to sheets (L/W → 1) before rolling into cochleates. A theoretical model based on electrostatic and surface energies shows that the nanoribbons convert to sheets via a first-order transition, at a critical Debye length, with 2 shallow minima of the order of thermal energy at L/W >> 1 and at L/W = 1. SAXS shows that interbilayer spacing (D) in the cochleates scales linearly with the Debye length, and ranges from 13 to 35 nm for NaCl concentrations from 100 to 5 mM. Theoretical arguments that include electrostatic and elastic energies explain the membrane rolling and the bilayer separation-Debye length relationship. These models suggest that the salt-induced ribbon to cochleate transition should be common to all charged bilayers possessing an intrinsic curvature, which in the present case originates from molecular chirality. Our studies show how electrostatic interactions can be tuned to attain and control cochleate structures, which have potential for encapsulating, and releasing macromolecules in a size-selective manner.
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Alginate-coating of artemisinin-loaded cochleates results in better control over gastro-intestinal release for effective oral delivery. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.04.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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9
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Belubbi T, Shevade S, Dhawan V, Sridhar V, Majumdar A, Nunes R, Araújo F, Sarmento B, Nagarsenker K, Steiniger F, Fahr A, Magarkar A, Bunker A, Nagarsenker M. Lipid Architectonics for Superior Oral Bioavailability of Nelfinavir Mesylate: Comparative in vitro and in vivo Assessment. AAPS PharmSciTech 2018; 19:3584-3598. [PMID: 30209788 DOI: 10.1208/s12249-018-1156-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/18/2018] [Indexed: 11/30/2022] Open
Abstract
Nelfinavir mesylate (NFV), a human immunodeficiency virus (HIV) protease inhibitor, is an integral component of highly active anti retro viral therapy (HAART) for management of AIDS. NFV possesses pH-dependent solubility and has low and variable bioavailability hampering its use in therapeutics. Lipid-based particulates have shown to improve solubility of poorly water soluble drugs and oral absorption, thereby aiding in improved bioavailability. The current study compares potential of vesicular and solid lipid nanocarriers of NFV with drug nanocrystallites and microvesicular systems like cochleates in improving bioavailability of NFV. The paper outlines investigation of systems using in vitro models like in vitro lipolysis, in vitro release, and permeation through cell lines to predict the in vivo potential of nanocarriers. Finally, in vivo pharmacokinetic study is reported which provided proof of concept in sync with results from in vitro studies. Graphical Abstract ᅟ.
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10
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Boye TL, Jeppesen JC, Maeda K, Pezeshkian W, Solovyeva V, Nylandsted J, Simonsen AC. Annexins induce curvature on free-edge membranes displaying distinct morphologies. Sci Rep 2018; 8:10309. [PMID: 29985397 PMCID: PMC6037701 DOI: 10.1038/s41598-018-28481-z] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 06/19/2018] [Indexed: 12/31/2022] Open
Abstract
Annexins are a family of proteins characterized by their ability to bind anionic membranes in response to Ca2+-activation. They are involved in a multitude of cellular functions including vesiculation and membrane repair. Here, we investigate the effect of nine annexins (ANXA1-ANXA7, ANXA11, ANXA13) on negatively charged double supported membrane patches with free edges. We find that annexin members can be classified according to the membrane morphology they induce and matching a dendrogam of the annexin family based on full amino acid sequences. ANXA1 and ANXA2 induce membrane folding and blebbing initiated from membrane structural defects inside patches while ANXA6 induces membrane folding originating both from defects and from the membrane edges. ANXA4 and ANXA5 induce cooperative roll-up of the membrane starting from free edges, producing large rolls. In contrast, ANXA3 and ANXA13 roll the membrane in a fragmented manner producing multiple thin rolls. In addition to rolling, ANXA7 and ANXA11 are characterized by their ability to form fluid lenses localized between the membrane leaflets. A shared feature necessary for generating these morphologies is the ability to induce membrane curvature on free edged anionic membranes. Consequently, induction of membrane curvature may be a significant property of the annexin protein family that is important for their function.
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Affiliation(s)
- Theresa Louise Boye
- Membrane Integrity Group, Unit for Cell Death and Metabolism, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100, Copenhagen, Denmark
| | - Jonas Camillus Jeppesen
- University of Southern Denmark (SDU), Campusvej 55, DK-5230, Odense M, Denmark.,Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark
| | - Kenji Maeda
- Membrane Integrity Group, Unit for Cell Death and Metabolism, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100, Copenhagen, Denmark
| | - Weria Pezeshkian
- University of Southern Denmark (SDU), Campusvej 55, DK-5230, Odense M, Denmark.,Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark
| | - Vita Solovyeva
- University of Southern Denmark (SDU), Campusvej 55, DK-5230, Odense M, Denmark.,Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Jesper Nylandsted
- Membrane Integrity Group, Unit for Cell Death and Metabolism, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100, Copenhagen, Denmark.,Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200, Copenhagen N, Denmark
| | - Adam Cohen Simonsen
- University of Southern Denmark (SDU), Campusvej 55, DK-5230, Odense M, Denmark. .,Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark.
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11
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Nagarsekar K, Ashtikar M, Steiniger F, Thamm J, Schacher FH, Fahr A. Micro-spherical cochleate composites: method development for monodispersed cochleate system. J Liposome Res 2016; 27:32-40. [DOI: 10.3109/08982104.2016.1149865] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Kalpa Nagarsekar
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Jena, Germany,
| | - Mukul Ashtikar
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Jena, Germany,
| | - Frank Steiniger
- Elektronenmikroskopisches Zentrum, Universitätsklinikum Jena, Jena, Germany,
| | - Jana Thamm
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Jena, Germany,
| | - Felix H. Schacher
- Institut für Organische Chemie und Makromolekulare Chemie, Friedrich-Schiller-Universität Jena, Jena, Germany, and
- Jena Center for Soft Matter, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Alfred Fahr
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Jena, Germany,
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12
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Nagarsekar K, Ashtikar M, Steiniger F, Thamm J, Schacher F, Fahr A. Understanding cochleate formation: insights into structural development. SOFT MATTER 2016; 12:3797-3809. [PMID: 26997365 DOI: 10.1039/c5sm01469g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Understanding the structure and the self-assembly process of cochleates has become increasingly necessary considering the advances of this drug delivery system towards the pharmaceutical industry. It is well known that the addition of cations like calcium to a dispersion of anionic lipids such as phosphatidylserines results in stable, multilamellar cochleates through a spontaneous assembly. In the current investigation we have studied the intermediate structures generated during this self-assembly of cochleates. To achieve this, we have varied the process temperature for altering the rate of cochleate formation. Our findings from electron microscopy studies showed the formation of ribbonlike structures, which with proceeding interaction associate to form lipid stacks, networks and eventually cochleates. We also observed that the variation in lipid acyl chains did not make a remarkable difference to the type of structure evolved during the formation of cochleates. More generally, our observations provide a new insight into the self-assembly process of cochleates based on which we have proposed a pathway for cochleate formation from phosphatidylserine and calcium. This knowledge could be employed in using cochleates for a variety of possible biomedical applications in the future.
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Affiliation(s)
- Kalpa Nagarsekar
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Mukul Ashtikar
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Frank Steiniger
- Elektronenmikroskopisches Zentrum, Universitätsklinikum Jena, Ziegelmühlenweg 1, 07743 Jena, Germany
| | - Jana Thamm
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Felix Schacher
- Institut für Organische Chemie und Makromolekulare Chemie Friedrich-Schiller-Universität Jena, Lessingstraße 8, 07743 Jena, Germany and Jena Center for Soft Matter, Friedrich-Schiller-Universität Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Alfred Fahr
- Lehrstuhl für Pharmazeutische Technologie, Institut für Pharmazie, Friedrich-Schiller-Universität Jena, Lessingstraße 8, 07743 Jena, Germany.
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13
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Losensky L, Goldenbogen B, Holland G, Laue M, Petran A, Liebscher J, Scheidt HA, Vogel A, Huster D, Klipp E, Arbuzova A. Micro- and nano-tubules built from loosely and tightly rolled up thin sheets. Phys Chem Chem Phys 2016; 18:1292-301. [PMID: 26659839 DOI: 10.1039/c5cp06084b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tubular structures built from amphiphilic molecules are of interest for nano-sensing, drug delivery, and structuring of oils. In this study, we characterized the tubules built in aqueous suspensions of a cholesteryl nucleoside conjugate, cholesterylaminouridine (CholAU) and phosphatidylcholines (PCs). In mixtures with unsaturated PCs having chain lengths comparable to the length of CholAU, two different types of tubular structures were observed; nano- and micro-tubules had average diameters in the ranges 50-300 nm and 2-3 μm, respectively. Using cryo scanning electron microscopy (cryo-SEM) we found that nano- and micro-tubules differed in their morphology: the nano-tubules were densely packed, whereas micro-tubules consisted of loosely rolled undulated lamellas. Atomic force microscopy (AFM) revealed that the nano-tubules were built from 4 to 5 nm thick CholAU-rich bilayers, which were in the crystalline state. Solid-state (2)H NMR spectroscopy also confirmed that about 25% of the total CholAU, being about the fraction of CholAU composing the tubules, formed the rigid crystalline phase. We found that CholAU/PC tubules can be functionalized by molecules inserted into lipid bilayers and fluorescently labeled PCs and lipophilic nucleic acids inserted spontaneously into the outer layer of the tubules. The tubular structures could be loaded and cross-linked, e.g. by DNA hybrids, and, therefore, are of interest for further development, e.g. as a depot scaffold for tissue regeneration.
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Affiliation(s)
- Luisa Losensky
- Molecular Biophysics, Institute of Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany.
| | - Björn Goldenbogen
- Theoretical Biophysics, Institute of Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany
| | - Gudrun Holland
- Robert Koch Institute, ZBS 4, Seestr. 10, 13353 Berlin, Germany
| | - Michael Laue
- Robert Koch Institute, ZBS 4, Seestr. 10, 13353 Berlin, Germany
| | - Anca Petran
- National Institute of Research and Development for Isotopic and Molecular Technologies, Donat 67-103, RO-400293 Cluj-Napoca, Romania
| | - Jürgen Liebscher
- National Institute of Research and Development for Isotopic and Molecular Technologies, Donat 67-103, RO-400293 Cluj-Napoca, Romania
| | - Holger A Scheidt
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Alexander Vogel
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Daniel Huster
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Edda Klipp
- Theoretical Biophysics, Institute of Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany
| | - Anna Arbuzova
- Molecular Biophysics, Institute of Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115 Berlin, Germany.
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Hollander A, Danino D. Cochleate characterization by cryogenic electron microscopy methods: Cryo-TEM and Cryo-SEM. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Bozó T, Brecska R, Gróf P, Kellermayer MSZ. Extreme resilience in cochleate nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:839-845. [PMID: 25521248 DOI: 10.1021/la504428x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cochleates, prospective nanoscale drug delivery vehicles, are rolls of negatively charged phospholipid membrane layers. The membrane layers are held together by calcium ions; however, neither the magnitude of membrane interaction forces nor the overall mechanical properties of cochleates have been known. Here, we manipulated individual nanoparticles with atomic force microscopy to characterize their nanomechanical behavior. Their stiffness (4.2-12.5 N/m) and membrane-rupture forces (45.3-278 nN) are orders of magnitude greater than those of the tough viral nanoshells. Even though the fundamental building material of cochleates is a fluid membrane, the combination of supramolecular geometry, the cross-linking action of calcium, and the tight packing of the ions apparently lead to extreme mechanical resilience. The supramolecular design of cochleates may provide efficient protection for encapsulated materials and give clues to understanding biomolecular structures of similar design, such as the myelinated axon.
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Affiliation(s)
- Tamás Bozó
- Department of Biophysics and Radiation Biology, and ‡MTA-SE Molecular Biophysics Research Group, Semmelweis University , Tűzoltó utca 37-47, Budapest 1094, Hungary
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