1
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Wölk C, Shen C, Hause G, Surya W, Torres J, Harvey RD, Bello G. Membrane Condensation and Curvature Induced by SARS-CoV-2 Envelope Protein. Langmuir 2024; 40:2646-2655. [PMID: 38258382 PMCID: PMC10851660 DOI: 10.1021/acs.langmuir.3c03079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/07/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024]
Abstract
The envelope (E) protein of SARS-CoV-2 participates in virion encapsulation and budding at the membrane of the endoplasmic reticulum Golgi intermediate compartment (ERGIC). The positively curved membrane topology required to fit an 80 nm viral particle is energetically unfavorable; therefore, viral proteins must facilitate ERGIC membrane curvature alteration. To study the possible role of the E protein in this mechanism, we examined the structural modification of the host lipid membrane by the SARS-CoV-2 E protein using synchrotron-based X-ray methods. Our reflectometry results on solid-supported planar bilayers show that E protein markedly condenses the surrounding lipid bilayer. For vesicles, this condensation effect differs between the two leaflets such that the membrane becomes asymmetric and increases its curvature. The formation of such a curved and condensed membrane is consistent with the requirements to stably encapsulate a viral core and supports a role for E protein in budding during SARS-CoV-2 virion assembly.
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Affiliation(s)
- Christian Wölk
- Pharmaceutical
Technology, Medical Faculty, University
Leipzig, Eilenburger
Straße 15a, 04317 Leipzig, Germany
| | - Chen Shen
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Gerd Hause
- Biocenter, Martin-Luther University Halle-Wittenberg, Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Wahyu Surya
- School
of Biological Sciences, Nanyang Technological
University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Jaume Torres
- School
of Biological Sciences, Nanyang Technological
University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Richard D. Harvey
- Division
of Pharmaceutical Chemistry, Department of Pharmaceutical Sciences, University of Vienna, Josef-Holaubek-Platz 2, UZA 2, Vienna 1090, Austria
| | - Gianluca Bello
- Division
of Pharmaceutical Chemistry, Department of Pharmaceutical Sciences, University of Vienna, Josef-Holaubek-Platz 2, UZA 2, Vienna 1090, Austria
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2
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Schulze J, Schöne L, Ayoub AM, Librizzi D, Amin MU, Engelhardt K, Yousefi BH, Bender L, Schaefer J, Preis E, Schulz-Siegmund M, Wölk C, Bakowsky U. Modern Photodynamic Glioblastoma Therapy Using Curcumin- or Parietin-Loaded Lipid Nanoparticles in a CAM Model Study. ACS Appl Bio Mater 2023; 6:5502-5514. [PMID: 38016693 PMCID: PMC10732153 DOI: 10.1021/acsabm.3c00695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/27/2023] [Accepted: 10/30/2023] [Indexed: 11/30/2023]
Abstract
Natural photosensitizers, such as curcumin or parietin, play a vital role in photodynamic therapy (PDT), causing a light-mediated reaction that kills cancer cells. PDT is a promising treatment option for glioblastoma, especially when combined with nanoscale drug delivery systems. The curcumin- or parietin-loaded lipid nanoparticles were prepared via dual asymmetric centrifugation and subsequently characterized through physicochemical analyses including dynamic light scattering, laser Doppler velocimetry, and atomic force microscopy. The combination of PDT and lipid nanoparticles has been evaluated in vitro regarding uptake, safety, and efficacy. The extensive and well-vascularized chorioallantois membrane (CAM) of fertilized hen's eggs offers an optimal platform for three-dimensional cell culture, which has been used in this study to evaluate the photodynamic efficacy of lipid nanoparticles against glioblastoma cells. In contrast to other animal models, the CAM model lacks a mature immune system in an early stage, facilitating the growth of xenografts without rejection. Treatment of xenografted U87 glioblastoma cells on CAM was performed to assess the effects on tumor viability, growth, and angiogenesis. The xenografts and the surrounding blood vessels were targeted through topical application, and the effects of photodynamic therapy have been confirmed microscopically and via positron emission tomography and X-ray computed tomography. Finally, the excised xenografts embedded in the CAM were analyzed histologically by hematoxylin and eosin and KI67 staining.
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Affiliation(s)
- Jan Schulze
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Lisa Schöne
- Institute
of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, Eilenburger Strasse 15a, Leipzig 04317, Germany
| | - Abdallah M. Ayoub
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Damiano Librizzi
- Center
for Tumor Biology and Immunology (ZTI), Core Facility Molecular Imaging,
Department of Nuclear Medicine, University
of Marburg, Hans-Meerwein-Strasse 3, Marburg 35043, Germany
| | - Muhammad Umair Amin
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Konrad Engelhardt
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Behrooz H. Yousefi
- Center
for Tumor Biology and Immunology (ZTI), Core Facility Molecular Imaging,
Department of Nuclear Medicine, University
of Marburg, Hans-Meerwein-Strasse 3, Marburg 35043, Germany
| | - Lena Bender
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Jens Schaefer
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Eduard Preis
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
| | - Michaela Schulz-Siegmund
- Institute
of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, Eilenburger Strasse 15a, Leipzig 04317, Germany
| | - Christian Wölk
- Institute
of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, Eilenburger Strasse 15a, Leipzig 04317, Germany
| | - Udo Bakowsky
- Department
of Pharmaceutics and Biopharmaceutics, University
of Marburg, Robert-Koch-Strasse 4, Marburg 35037, Germany
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3
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Mahmoud DB, Wölk C, Schulz-Siegmund M. Fabrication of 3D Printed, Core-and-Shell Implants as Controlled Release Systems for Local siRNA Delivery. Adv Healthc Mater 2023; 12:e2301643. [PMID: 37712605 DOI: 10.1002/adhm.202301643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/21/2023] [Indexed: 09/16/2023]
Abstract
The development and clinical translation of small interfering RNA (siRNA) therapies remains challenging owing to their poor pharmacokinetics. 3D printing technology presents a great opportunity to fabricate personalized implants for local and sustained delivery of siRNA. Hydrogels can mimic the mechanical properties of tissues, avoiding the problems associated with rigid implants. Herein, a thermoresponsive composite hydrogel suitable for extrusion 3D-printing is formulated to fabricate controlled-release implants loaded with siRNA-Lipofectamine RNAiMAX complexes. A hydrogel matrix mainly composed of uncharged agarose to protect siRNA from decomplexation is selected. Additionally, pluronic F127 and gelatin are added to improve the printability, degradation, and cell adhesion to the implants. To avoid exposing siRNA to thermal stress during the printing process, a core-and-shell design is set up for the implants in which a core of siRNA-complexes loaded-pluronic F127 is printed without heat and enclosed with a shell comprising the thermoresponsive composite hydrogel. The release profile of siRNA-complexes is envisioned to be controlled by varying the printing patterns. The results reveal that the implants sustain siRNA release for one month. The intactness of the released siRNA-complexes is proven until the eighth day. Furthermore, by changing the printing patterns, the release profiles can be tailored.
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Affiliation(s)
- Dina B Mahmoud
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317, Leipzig, Germany
- Department of Pharmaceutics, Egyptian Drug Authority, Giza, 11553, Egypt
| | - Christian Wölk
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317, Leipzig, Germany
| | - Michaela Schulz-Siegmund
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317, Leipzig, Germany
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4
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Stefaniu C, Wölk C, Latza VM, Chumakov A, Brezesinski G, Schneck E. Cross-linking reactions in Langmuir monolayers of specially designed aminolipids - a toolbox for the customized production of amphiphilic nanosheets. Nanoscale Adv 2023; 5:4589-4597. [PMID: 37638167 PMCID: PMC10448339 DOI: 10.1039/d3na00244f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 08/09/2023] [Indexed: 08/29/2023]
Abstract
Synthetic amino lipids, already known as highly efficient gene therapy tool, are used in a novel way to create cross-linked stable one-molecule-thin films envisioned for future (bio)-materials applications. The films are prepared as Langmuir monolayers at the air/water interface and cross-linked 'in situ' via dynamic imine chemistry. The cross-linking process and the film characteristics are monitored by various surface-sensitive techniques such as grazing incidence X-ray diffraction, X-ray reflectivity, and infrared reflection-absorption spectroscopy. After transfer onto carbon grids, the cross-linked films are investigated by transmission and scanning electron microscopy. The obtained micrographs display mechanically self-supported nanosheets with area dimensions over several micrometers and, thus, an undeniable visual proof of successful cross-linking. The cross-linking process at the air/water interface allows to obtain Janus-faced sheets with a hydrophobic side characterized by aliphatic alkyl chains and a hydrophilic side characterized by nucleophilic groups like amines, hydroxyl groups and imine.
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Affiliation(s)
- Cristina Stefaniu
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
| | - Christian Wölk
- Pharmaceutical Technology, Faculty of Medicine, University of Leipzig Eilenburger Str. 15a 04317 Leipzig Germany
| | - Victoria M Latza
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
| | - Andrei Chumakov
- European Synchrotron Radiation Facility 71, avenue des Martyrs, CS 40220 38043 Grenoble Cedex 9 France
| | - Gerald Brezesinski
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
- Department of Physics, TU Darmstadt Hochschulstr. 8 64289 Darmstadt Germany
| | - Emanuel Schneck
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
- Department of Physics, TU Darmstadt Hochschulstr. 8 64289 Darmstadt Germany
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5
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Husteden C, Brito Barrera YA, Tegtmeyer S, Borges J, Giselbrecht J, Menzel M, Langner A, Mano JF, Schmelzer CEH, Wölk C, Groth T. Lipoplex-Functionalized Thin-Film Surface Coating Based on Extracellular Matrix Components as Local Gene Delivery System to Control Osteogenic Stem Cell Differentiation. Adv Healthc Mater 2023; 12:e2201978. [PMID: 36377486 DOI: 10.1002/adhm.202201978] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/25/2022] [Indexed: 11/16/2022]
Abstract
A gene-activated surface coating is presented as a strategy to design smart biomaterials for bone tissue engineering. The thin-film coating is based on polyelectrolyte multilayers composed of collagen I and chondroitin sulfate, two main biopolymers of the bone extracellular matrix, which are fabricated by layer-by-layer assembly. For further functionalization, DNA/lipid-nanoparticles (lipoplexes) are incorporated into the multilayers. The polyelectrolyte multilayer fabrication and lipoplex deposition are analyzed by surface sensitive analytical methods that demonstrate successful thin-film formation, fibrillar structuring of collagen, and homogenous embedding of lipoplexes. Culture of mesenchymal stem cells on the lipoplex functionalized multilayer results in excellent attachment and growth of them, and also, their ability to take up cargo like fluorescence-labelled DNA from lipoplexes. The functionalization of the multilayer with lipoplexes encapsulating DNA encoding for transient expression of bone morphogenetic protein 2 induces osteogenic differentiation of mesenchymal stem cells, which is shown by mRNA quantification for osteogenic genes and histochemical staining. In summary, the novel gene-functionalized and extracellular matrix mimicking multilayer composed of collagen I, chondroitin sulfate, and lipoplexes, represents a smart surface functionalization that holds great promise for tissue engineering constructs and implant coatings to promote regeneration of bone and other tissues.
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Affiliation(s)
- Catharina Husteden
- Institute of Pharmacy, Department of Medicinal Chemistry, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Yazmin A Brito Barrera
- Institute of Pharmacy, Department of Biomedical Materials, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Str. 4, 06120, Halle (Saale), Germany
| | - Sophia Tegtmeyer
- Institute of Pharmacy, Department of Medicinal Chemistry, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - João Borges
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Julia Giselbrecht
- Institute of Pharmacy, Department of Medicinal Chemistry, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Matthias Menzel
- Department of Biological and Macromolecular Materials, Fraunhofer Institute for Microstructure of Materials and Systems (IMWS), Walter-Hülse-Str. 1, 06120, Halle (Saale), Germany
| | - Andreas Langner
- Institute of Pharmacy, Department of Medicinal Chemistry, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - João F Mano
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Christian E H Schmelzer
- Department of Biological and Macromolecular Materials, Fraunhofer Institute for Microstructure of Materials and Systems (IMWS), Walter-Hülse-Str. 1, 06120, Halle (Saale), Germany
| | - Christian Wölk
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, 04317, Leipzig, Germany
| | - Thomas Groth
- Institute of Pharmacy, Department of Biomedical Materials, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Str. 4, 06120, Halle (Saale), Germany.,Interdisciplinary Center of Materials Science, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Str. 4, 06120, Halle (Saale), Germany
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6
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Roerig J, Mitrach F, Schmid M, Hause G, Hacker MC, Wölk C, Schulz-Siegmund M. Synergistic siRNA Loading of Extracellular Vesicles Enables Functional Delivery into Cells. Small Methods 2022; 6:e2201001. [PMID: 36284470 DOI: 10.1002/smtd.202201001] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/23/2022] [Indexed: 06/16/2023]
Abstract
RNA interference opened new approaches for disease treatment but safe and efficient cell delivery remains a bottleneck. Extracellular vesicles (EVs) are known to naturally shuttle RNA. Due to their potent cell internalization and low-cost scalability, milk-derived EVs in particular are considered promising RNA delivery systems. However, low drug loading currently impedes their use. Here, innovative exogenous loading strategies for small interfering RNA (siRNA) are explored and systematically compared regarding encapsulation efficiency, loading capacity, and loading concentration. Firstly, siRNA is pre-accumulated in liposomes or stabilized calcium phosphate nanoparticles (CaP-NP). The selected systems, which exhibited neutral or negative zeta potentials, are then applied for EV loading. Secondly, EVs are concentrated and applied to protocols known for liposome loading: dehydration-rehydration of vesicles, based on freeze-drying, and mixing by dual asymmetric centrifugation (DAC) after ultracentrifugation. Additionally, DAC after EV ultracentrifugation is combined with CaP-NP leading to a synergistic loading performance. The balance between energy input for siRNA loading and EV integrity is evaluated by monitoring the EV size, marker proteins, and morphology. For the EV-based siRNA formulation via DAC plus CaP-NP, EV properties are sufficiently maintained to protect the siRNA from degradation and deliver cell-death siRNA dose-dependently in Caco-2 cells.
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Affiliation(s)
- Josepha Roerig
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, 04275, Leipzig, Germany
| | - Franziska Mitrach
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, 04275, Leipzig, Germany
| | - Maximilian Schmid
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, 04275, Leipzig, Germany
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich-Heine University, 40225, Duesseldorf, Germany
| | - Gerd Hause
- Biocenter, Martin-Luther University Halle-Wittenberg, 06099, Halle (Saale), Germany
| | - Michael C Hacker
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, 04275, Leipzig, Germany
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich-Heine University, 40225, Duesseldorf, Germany
| | - Christian Wölk
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, 04275, Leipzig, Germany
| | - Michaela Schulz-Siegmund
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, 04275, Leipzig, Germany
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7
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Giselbrecht J, Pinnapireddy SR, Alioglu F, Sami H, Sedding D, Erdmann F, Janich C, Schulz-Siegmund M, Ogris M, Bakowsky U, Langner A, Bussmann J, Wölk C. Investigating 3R In Vivo Approaches for Bio-Distribution and Efficacy Evaluation of Nucleic Acid Nanocarriers: Studies on Peptide-Mimicking Ionizable Lipid. Small 2022; 18:e2107768. [PMID: 35355412 DOI: 10.1002/smll.202107768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Formulations based on ionizable amino-lipids have been put into focus as nucleic acid delivery systems. Recently, the in vitro efficacy of the lipid formulation OH4:DOPE has been explored. However, in vitro performance of nanomedicines cannot correctly predict in vivo efficacy, thereby considerably limiting pre-clinical translation. This is further exacerbated by limited access to mammalian models. The present work proposes to close this gap by investigating in vivo nucleic acid delivery within simpler models, but which still offers physiologically complex environments and also adheres to the 3R guidelines (replace/reduce/refine) to improve animal experiments. The efficacy of OH4:DOPE as a delivery system for nucleic acids is demonstrated using in vivo approaches. It is shown that the formulation is able to transfect complex tissues using the chicken chorioallantoic membrane model. The efficacy of DNA and mRNA lipoplexes is tested extensively in the zebra fish (Danio rerio) embryo which allows the screening of biodistribution and transfection efficiency. Effective transfection of blood vessel endothelial cells is seen, especially in the endocardium. Both model systems allow an efficacy screening according to the 3R guidelines bypassing the in vitro-in vivo gap. Pilot studies in mice are performed to correlate the efficacy of in vivo transfection.
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Affiliation(s)
- Julia Giselbrecht
- Department of Medicinal Chemistry/Department of Pharmacology, Institute of Pharmacy Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037, Marburg, Germany
- CSL Behring Innovation GmbH, Emil-von-Behring-Str. 76, 35041, Marburg, Germany
| | - Fatih Alioglu
- Faculty of Life Sciences, Department of Pharmaceutical Sciences, Laboratory of MacroMolecular Cancer Therapeutics (MMCT), University of Vienna, Althanstrasse 14, Vienna, 1090, Austria
| | - Haider Sami
- Faculty of Life Sciences, Department of Pharmaceutical Sciences, Laboratory of MacroMolecular Cancer Therapeutics (MMCT), University of Vienna, Althanstrasse 14, Vienna, 1090, Austria
| | - Daniel Sedding
- Internal Medicine III, Medical Faculty of Martin Luther University Halle-Wittenberg, Ernst-Grube-Str. 40, 06120, Halle (Saale), Germany
| | - Frank Erdmann
- Department of Medicinal Chemistry/Department of Pharmacology, Institute of Pharmacy Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Christopher Janich
- Department of Medicinal Chemistry/Department of Pharmacology, Institute of Pharmacy Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Michaela Schulz-Siegmund
- Pharmaceutical Technology, Medical Faculty, University Leipzig, Eilenburger Straße 15a, 04317, Leipzig, Germany
| | - Manfred Ogris
- Faculty of Life Sciences, Department of Pharmaceutical Sciences, Laboratory of MacroMolecular Cancer Therapeutics (MMCT), University of Vienna, Althanstrasse 14, Vienna, 1090, Austria
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037, Marburg, Germany
| | - Andreas Langner
- Department of Medicinal Chemistry/Department of Pharmacology, Institute of Pharmacy Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Jeroen Bussmann
- Division of BioTherapeutics, Leiden Academic Center for Drug Research, Leiden University, Einsteinweg 55, Leiden, 2333 CC, The Netherlands
| | - Christian Wölk
- Pharmaceutical Technology, Medical Faculty, University Leipzig, Eilenburger Straße 15a, 04317, Leipzig, Germany
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8
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Hinkelmann S, Springwald AH, Starke A, Kalwa H, Wölk C, Hacker MC, Schulz-Siegmund M. Microtissues from mesenchymal stem cells and siRNA-loaded cross-linked gelatin microparticles for bone regeneration. Mater Today Bio 2022; 13:100190. [PMID: 34988418 PMCID: PMC8693629 DOI: 10.1016/j.mtbio.2021.100190] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/20/2021] [Accepted: 12/11/2021] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was the evaluation of cross-linked gelatin microparticles (cGM) as substrates for osteogenic cell culture to assemble 3D microtissues and their use as delivery system for siRNA to cells in these assemblies. In a 2D transwell cultivation system, we found that cGM are capable to accumulate calcium ions from the surrounding medium. Such a separation of cGM and SaOS-2 cells consequently led to a suppressed matrix mineral formation in the SaOS-2 culture on the well bottom of the transwell system. Thus, we decided to use cGM as component in 3D microtissues and get a close contact between calcium ion accumulating microparticles and cells to improve matrix mineralization. Gelatin microparticles were cross-linked with a N,N-diethylethylenediamine-derivatized (DEED) maleic anhydride (MA) containing oligo (pentaerythritol diacrylate monostearate-co-N-isopropylacrylamide-co-MA) (oPNMA) and aggregated with SaOS-2 or human mesenchymal stem cells (hMSC) to microtissue spheroids. We systematically varied the content of cGM in microtissues and observed cell differentiation and tissue formation. Microtissues were characterized by gene expression, ALP activity and matrix mineralization. Mineralization was detectable in microtissues with SaOS-2 cells after 7 days and with hMSC after 24–28 days in osteogenic culture. When we transfected hMSC via cGM loaded with Lipofectamine complexed chordin siRNA, we found increased ALP activity and accelerated mineral formation in microtissues in presence of BMP-2. As a model for positive paracrine effects that indicate promising in vivo effects of these microtissues, we incubated pre-differentiated microtissues with freshly seeded hMSC monolayers and found improved mineral formation all over the well in the co-culture model. These findings may support the concept of microtissues from hMSC and siRNA-loaded cGM for bone regeneration.
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Affiliation(s)
- Sandra Hinkelmann
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Germany
| | - Alexandra H Springwald
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Germany
| | - Annett Starke
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Germany
| | - Hermann Kalwa
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Faculty of Medicine, University of Leipzig, Leipzig, Germany
| | - Christian Wölk
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Germany
| | - Michael C Hacker
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Germany.,Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University, Düsseldorf, Germany
| | - Michaela Schulz-Siegmund
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Germany
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9
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Brito Barrera YA, Husteden C, Alherz J, Fuhrmann B, Wölk C, Groth T. Extracellular matrix-inspired surface coatings functionalized with dexamethasone-loaded liposomes to induce osteo- and chondrogenic differentiation of multipotent stem cells. Mater Sci Eng C Mater Biol Appl 2021; 131:112516. [PMID: 34857295 DOI: 10.1016/j.msec.2021.112516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/19/2021] [Accepted: 10/22/2021] [Indexed: 10/20/2022]
Abstract
Biomimetic surface coatings can be combined with conventional implants to mimic the extracellular matrix (ECM) of the surrounding tissue to make them more biocompatible. Layer-by-layer technique (LbL) can be used for making surface coatings by alternating adsorption of polyanions and polycations from aqueous solutions without need of chemical reactions. Here, polyelectrolyte multilayer (PEM) systems is made of hyaluronic acid (HA) as polyanion and Collagen I (Col) as polycation to mimic the ECM of connective tissue. The PEM are combined with dexamethasone (Dex)-loaded liposomes to achieve a local delivery and protection of this drug for stimulation of osteo- and chondrogenic differentiation of multipotent stem cells. The liposomes possess a positive surface charge that is required for immobilization on the PEM. The surface properties of PEM system show a positive zeta potential after liposome adsorption and a decrease in wettability, both promoting cell adhesion and spreading of C3H10T1/2 multipotent embryonic mouse fibroblasts. Differentiation of C3H10T1/2 was more prominent on the PEM system with embedded Dex-loaded liposomes compared to the basal PEM system and the use of free Dex-loaded liposomes in the supernatant. This was evident by immunohistochemical staining and an upregulation of the expression of genes, which play a key role in osteogenesis (RunX2, ALP, Osteocalcin (OCN)) and chondrogenesis (Sox9, aggrecan (ACAN), collagen type II), determined by quantitative Real-time polymerase chain reaction (qRT-PCR) after 21 days. These findings indicate that the designed liposome-loaded PEM system have high potential for use as drug delivery systems for implant coatings that can induce bone and cartilage differentiation needed for example in osteochondral implants.
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Affiliation(s)
- Yazmin A Brito Barrera
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Strasse 4, 06120 Halle (Saale), Germany
| | - Catharina Husteden
- Medicinal Chemistry Department, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
| | - Jumanah Alherz
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Strasse 4, 06120 Halle (Saale), Germany
| | - Bodo Fuhrmann
- Interdisciplinary Center of Materials Science, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Christian Wölk
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317 Leipzig, Germany
| | - Thomas Groth
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Strasse 4, 06120 Halle (Saale), Germany; Interdisciplinary Center of Materials Science, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany; Laboratory of Biomedical Nanotechnologies, Institute of Bionic Technologies and Engineering, I.M. Sechenov First Moscow State University, 119991, Trubetskaya street 8, Moscow, Russian Federation.
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10
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Roerig J, Schiller L, Kalwa H, Hause G, Vissiennon C, Hacker MC, Wölk C, Schulz-Siegmund M. A focus on critical aspects of uptake and transport of milk-derived extracellular vesicles across the Caco-2 intestinal barrier model. Eur J Pharm Biopharm 2021; 166:61-74. [PMID: 34077790 DOI: 10.1016/j.ejpb.2021.05.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/19/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
Bovine milk-derived extracellular vesicles (EVs) hold promises as oral drug delivery systems. Since EV bioavailability studies are difficult to compare, key factors regarding EV uptake and intestinal permeability remain little understood. This work aims to critically study uptake and transport properties of milk-derived EVs across the intestinal barrier in vitro by standardization approaches. Therefore, uptake properties were directly compared to liposomes in intestinal Caco-2 cells. Reliable staining results were obtained by the choice of three distinct EV labeling sites, while non-specific dye transfer and excess dye removal were carefully controlled. A novel fluorescence correction factor was implemented to account for different labeling efficiencies. Both EV and liposome uptake occurred mainly energy dependent with the neonatal Fc receptor (FcRn) providing an exclusive active pathway for EVs. Confocal microscopy revealed higher internalization of EVs whereas liposomes rather remained attached to the cell surface. Internalization could be improved when changing the liposomal formulation to resemble the EV lipid composition. In a Caco-2/HT29-MTX co-culture liposomes and EVs showed partial mucus penetration. For transport studies across Caco-2 monolayers we further established a standardized protocol considering the distinct requirements for EVs. Especially insert pore sizes were systematically compared with 3 µm inserts found obligatory. Obtained apparent permeability coefficients (Papp) reflecting the transport rate will allow for better comparison of future bioavailability testing.
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Affiliation(s)
- Josepha Roerig
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, Germany.
| | - Laura Schiller
- Institute of Medical Physics and Biophysics, Medical Faculty, Leipzig University, Germany
| | - Hermann Kalwa
- Rudolf-Boehm-Institute of Pharmacology and Toxicology, Medical Faculty, Leipzig University, Germany
| | - Gerd Hause
- Biocenter, Martin-Luther University Halle-Wittenberg, Germany
| | - Cica Vissiennon
- Institute of Medical Physics and Biophysics, Medical Faculty, Leipzig University, Germany
| | - Michael C Hacker
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, Germany; Institute of Pharmaceutics and Biopharmaceutics, Heinrich-Heine University, Düsseldorf, Germany
| | - Christian Wölk
- Pharmaceutical Technology, Institute of Pharmacy, Medical Faculty, Leipzig University, Germany
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11
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Amin MU, Ali S, Ali MY, Tariq I, Nasrullah U, Pinnapreddy SR, Wölk C, Bakowsky U, Brüßler J. Enhanced efficacy and drug delivery with lipid coated mesoporous silica nanoparticles in cancer therapy. Eur J Pharm Biopharm 2021; 165:31-40. [PMID: 33962002 DOI: 10.1016/j.ejpb.2021.04.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 03/05/2021] [Accepted: 04/27/2021] [Indexed: 01/16/2023]
Abstract
The exposure of cancer cells to subtherapeutic drug concentrations results in multidrug resistance (MDR). The uniqueness of mesoporous silica nanoparticles (MSNPs) with larger surface area for higher drug loading can solve the issue by delivering higher amounts of chemotherapeutics to the cancer cells. However, premature drug release and lower biocompatibility remain challenging. Lipid coating of MSNPs at the same time, can enhance the stability and biocompatibility of nanocarriers. Furthermore, the lipid coating can reduce the systemic drug release and deliver higher amounts to the tumor site. Herein, lipid coated MSNPs were prepared by utilizing cationic liposomes and further investigations were made. Our studies have shown the higher entrapment of doxorubicin (Dox) to MSNPs due to availability of porous structure. Lipid coating could provide a barrier to sustain the release of drug along with reduced premature leakage. In addition, the biocompatibility and enhanced interaction of cationic liposomes to cell membranes resulted in better cellular uptake. Lipid coated silica nanoparticles have shown higher cellular toxicity as compared to non-lipid coated particles. The increase in cytotoxicity with time supports the hypothesis of sustained release of drug from lipid coated MSNPs. We propose the Lip-Dox-MSNPs as an effective approach to treat cancer by delivering and maintaining effective concentration of drugs to the tumor site without systemic side effects.
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Affiliation(s)
- Muhammad Umair Amin
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Marburg, Germany; Department of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Sajid Ali
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Marburg, Germany; Department of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Muhammad Yasir Ali
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Marburg, Germany; Faculty of Pharmaceutical Sciences, GC University Faisalabad, Faisalabad, Pakistan
| | - Imran Tariq
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Marburg, Germany; Punnjab University College of Pharmacy, University of Punjab, Lahore, Pakistan
| | - Usman Nasrullah
- Institute of General Pharmacology and Toxicology, Goethe University Frankfurt am Main, Germany
| | | | - Christian Wölk
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany; Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine Leipzig University, Leipzig, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Marburg, Germany
| | - Jana Brüßler
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Marburg, Germany.
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12
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Janich C, Ivanusic D, Giselbrecht J, Janich E, Pinnapireddy SR, Hause G, Bakowsky U, Langner A, Wölk C. Efficient Transfection of Large Plasmids Encoding HIV-1 into Human Cells-A High Potential Transfection System Based on a Peptide Mimicking Cationic Lipid. Pharmaceutics 2020; 12:pharmaceutics12090805. [PMID: 32854383 PMCID: PMC7559901 DOI: 10.3390/pharmaceutics12090805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/20/2020] [Accepted: 08/20/2020] [Indexed: 11/23/2022] Open
Abstract
One major disadvantage of nucleic acid delivery systems is the low transfection or transduction efficiency of large-sized plasmids into cells. In this communication, we demonstrate the efficient transfection of a 15.5 kb green fluorescent protein (GFP)-fused HIV-1 molecular clone with a nucleic acid delivery system prepared from the highly potent peptide-mimicking cationic lipid OH4 in a mixture with the phospholipid DOPE (co-lipid). For the transfection, liposomes were loaded using a large-sized plasmid (15.5 kb), which encodes a replication-competent HIV type 1 molecular clone that carries a Gag-internal green fluorescent protein (HIV-1 JR-FL Gag-iGFP). The particle size and charge of the generated nanocarriers with 15.5 kb were compared to those of a standardized 4.7 kb plasmid formulation. Stable, small-sized lipoplexes could be generated independently of the length of the used DNA. The transfer of fluorescently labeled pDNA-HIV1-Gag-iGFP in HEK293T cells was monitored using confocal laser scanning microscopy (cLSM). After efficient plasmid delivery, virus particles were detectable as budding structures on the plasma membrane. Moreover, we observed a randomized distribution of fluorescently labeled lipids over the plasma membrane. Obviously, a significant exchange of lipids between the drug delivery system and the cellular membranes occurs, which hints toward a fusion process. The mechanism of membrane fusion for the internalization of lipid-based drug delivery systems into cells is still a frequently discussed topic.
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Affiliation(s)
- Christopher Janich
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany; (J.G.); or (C.W.)
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany; (S.R.P.); (U.B.)
- Correspondence: (C.J.); (A.L.); Tel.: +49-3-455-52-5080 (C.J.); +49-3-419-71-1902 (A.L.)
| | - Daniel Ivanusic
- Robert Koch Institute, Division 18: HIV and Other Retroviruses, Nordufer 20, 13353 Berlin, Germany; (D.I.); (E.J.)
| | - Julia Giselbrecht
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany; (J.G.); or (C.W.)
| | - Elena Janich
- Robert Koch Institute, Division 18: HIV and Other Retroviruses, Nordufer 20, 13353 Berlin, Germany; (D.I.); (E.J.)
| | - Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany; (S.R.P.); (U.B.)
| | - Gerd Hause
- Biocenter, MLU Halle-Wittenberg, Weinbergweg 22, 06120 Halle (Saale), Germany;
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany; (S.R.P.); (U.B.)
| | - Andreas Langner
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany; (J.G.); or (C.W.)
- Correspondence: (C.J.); (A.L.); Tel.: +49-3-455-52-5080 (C.J.); +49-3-419-71-1902 (A.L.)
| | - Christian Wölk
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany; (J.G.); or (C.W.)
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, Eilenburger Strasse 15a, 04317 Leipzig, Germany
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13
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Alawak M, Mahmoud G, Dayyih AA, Duse L, Pinnapireddy SR, Engelhardt K, Awak I, Wölk C, König AM, Brüßler J, Bakowsky U. Magnetic resonance activatable thermosensitive liposomes for controlled doxorubicin delivery. Mater Sci Eng C Mater Biol Appl 2020; 115:111116. [PMID: 32600717 DOI: 10.1016/j.msec.2020.111116] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 05/19/2020] [Accepted: 05/23/2020] [Indexed: 01/10/2023]
Abstract
To limit the massive cytotoxicity of chemotherapeutic agents, it is desirable to establish an appropriate subtle blend of formulation design based on a dual-responsive strategy. In this study, a combined therapeutic platform based on magnetic thermosensitive liposomes (LipTS-GD) was developed. The incorporation of chelated-gadolinium imparted magnetic properties to thermosensitive liposomes (LipTS). The application of an ultra high field magnetic resonance imaging (UHF-MRI) induced hyperthermia, thus provided an improved chemotherapeutic effect of Doxorubicin (DOX). The paramagnetic platform demonstrated thermal sensitivity over a narrow temperature range starting at 37.8 °C, hence the release of DOX from LipTS-GD can be well triggered by inducing hyperthermia using UHF-MRI application. The prepared LipTS-GD were below 200 nm in diameter and an adequate release of DOX reaching 68% was obtained after 1 h UHF-MRI exposure. Profoundly, triple-negative breast cancer (TNBC) cells that were treated with LipTS-GD and subjected thereafter to UHF-MRI exposure for 60 min showed 36% viability. Hemocompatibility studies of LipTS-GD showed a physiological coagulation time and minimal hemolytic potential. Conclusively, LipTS-GD guided local delivery of DOX to solid tumors will potentially raise the therapeutic index, thus reducing the required dose and frequency of DOX administered systemically without influencing the adjacent tissues.
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Affiliation(s)
- Mohamad Alawak
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Gihan Mahmoud
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Helwan University, Ain Helwan, 11795 Cairo, Egypt
| | - Alice Abu Dayyih
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Lili Duse
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | | | - Konrad Engelhardt
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | | | - Christian Wölk
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, 06120 Halle, Germany
| | - Alexander M König
- Department of Diagnostic and Interventional Radiology, University of Marburg, 35032 Marburg, Germany
| | - Jana Brüßler
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany.
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14
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Brito Barrera Y, Hause G, Menzel M, Schmelzer C, Lehner E, Mäder K, Wölk C, Groth T. Engineering osteogenic microenvironments by combination of multilayers from collagen type I and chondroitin sulfate with novel cationic liposomes. Mater Today Bio 2020; 7:100071. [PMID: 32924006 PMCID: PMC7476072 DOI: 10.1016/j.mtbio.2020.100071] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 11/28/2022] Open
Abstract
Cationic liposomes composed of a novel lipid (N-{6-amino-1-[N-(9Z) -octadec9-enylamino] -1-oxohexan-(2S) -2-yl} -N'- {2- [N, N-bis(2-aminoethyl) amino] ethyl} -2-hexadecylpropandiamide) (OO4) and dioleoylphosphatidylethanolamine (DOPE) possess high amounts of amino groups and are promising systems for lipofection. Moreover, these cationic liposomes can also be used as a polycationic entity in multilayer formation using layer-by-layer technique (LbL), which is a method to fabricate surface coatings by alternating adsorption of polyanions and polycations. Since liposomes are suitable for endocytosis by or fusion with cells, controlled release of their cargo on site is possible. Here, a polyelectrolyte multilayer (PEM) system was designed of chondroitin sulfate (CS) and collagen type I (Col I) by LbL technique with OO4/DOPE liposomes embedded in the terminal layers to create an osteogenic microenvironment. Both, the composition of PEM and cargo of the liposomes were used to promote osteogenic differentiation of C2C12 myoblasts as in vitro model. The internalization of cargo-loaded liposomes from the PEM into C2C12 cells was studied using lipophilic (Rhodamine-DOPE conjugate) and hydrophilic (Texas Red-labeled dextran) model compounds. Besides, the use of Col I and CS should mimic the extracellular matrix of bone for future applications such as bone replacement therapies. Physicochemical studies of PEM were done to characterize the layer growth, thickness, and topography. The adhesion of myoblast cells was also evaluated whereby the benefit of a cover layer of CS and finally Col I above the liposome layer was demonstrated. As proof of concept, OO4/DOPE liposomes were loaded with dexamethasone, a compound that can induce osteogenic differentiation. A successful induction of osteogenic differentiation of C2C12 cells with the novel designed liposome-loaded PEM system was shown. These findings indicate that designed OH4/DOPE loaded PEMs have a high potential to be used as drug delivery or transfection system for implant coating in the field of bone regeneration and other applications.
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Key Words
- AFM, Atomic force microscopy
- C2C12 myoblasts
- CLSM, Confocal Laser Scanning Microscopy
- CS, chondroitin sulfate
- Col I, Collagen I
- DLS, Dynamic light scattering
- DMEM, Dulbecco’s modified Eagle’s medium
- DOPE, dioleoylphosphatidylethanolamine
- Dex, Dexamethasone
- ECM, Extracellular matrix
- GAG, Glycosaminoglycan
- LbL, Layer-by-Layer technique
- OO4, (N-{6-amino-1-[N-(9Z) -octadec9-enylamino] -1-oxohexan-(2S) -2-yl} -N’- {2- [N, N-bis(2-aminoethyl) amino] ethyl} -2-hexadecylpropandiamide)
- PBS, Phosphate-buffered saline
- PEI, Polyethylenimine
- PEM, Polyelectrolyte multilayer
- SEM, Scanning electron microscopy
- SPR, Surface plasmon resonance
- TEM, Transmission electron microscopy
- WCA, Water contact angle
- cationic lipids
- chondroitin sulfate
- collagen I
- internalization
- osteogenic differentiation
- polyelectrolyte multilayer system
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Affiliation(s)
- Y.A. Brito Barrera
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle−Wittenberg, Heinrich Damerow Strasse 4, 06120, Halle (Saale), Germany
| | - G. Hause
- Martin Luther University Halle-Wittenberg, Biocenter, Weinbergweg 22, 06120, Halle (Saale), Germany
| | - M. Menzel
- Department of Biological and Macromolecular Materials, Fraunhofer Institute for Microstructure of Materials and Systems (IMWS), Walter-Hülse-Strasse 1, 06120, Halle (Saale), Germany
| | - C.E.H. Schmelzer
- Department of Biological and Macromolecular Materials, Fraunhofer Institute for Microstructure of Materials and Systems (IMWS), Walter-Hülse-Strasse 1, 06120, Halle (Saale), Germany
| | - E. Lehner
- Department Pharmaceutical Technology, Institute of Pharmacy, Martin Luther University Halle−Wittenberg, Kurt-Mothes Straße 3, 06120, Halle (Saale), Germany
| | - K. Mäder
- Department Pharmaceutical Technology, Institute of Pharmacy, Martin Luther University Halle−Wittenberg, Kurt-Mothes Straße 3, 06120, Halle (Saale), Germany
| | - C. Wölk
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317, Leipzig, Germany
| | - T. Groth
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle−Wittenberg, Heinrich Damerow Strasse 4, 06120, Halle (Saale), Germany
- Interdisciplinary Center of Materials Science, Martin Luther University Halle-Wittenberg, D-06099, Halle (Saale), Germany
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15
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Schüer JJ, Arndt A, Wölk C, Pinnapireddy SR, Bakowsky U. Establishment of a Synthetic In Vitro Lung Surfactant Model for Particle Interaction Studies on a Langmuir Film Balance. Langmuir 2020; 36:4808-4819. [PMID: 32306733 DOI: 10.1021/acs.langmuir.9b03712] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
With the intention to provide a robust and economical model that can be used for predicting particle interactions with the pulmonary surfactant, this study was aimed to find an artificial surfactant model that perfectly mimics the properties of the natural pulmonary surfactant. A surfactant model should be reproducible, robust, and able to predict interactions between the pulmonary surfactant and exogenous influences from air and the aqueous site. We compared three synthetic models with the natural bovine surfactant Alveofact. The lung conditions were simulated by spreading the surfactants at the air/aqueous interface on a Langmuir trough with movable barriers. All three artificial surfactant models showed properties very similar to that of Alveofact. Visualization of the monolayers by atomic force microscopy revealed very similar structures with domain formation. The Tanaka lipid mixture has already shown good results in vitro and in vivo in previous studies. The 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC)-1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) model has large conformations in the surface pressure isotherms and showed a biomimetic exclusion plateau, indicative of an effective lung surfactant formulation. Also, the equilibrium spreading pressure was similar. DPPC-1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-1'-rac-glycerol (POPG) had the greatest similarities with Alveofact in the hysteresis areas. The kinetic constants of the relaxation experiments during desorption showed that the PCPG model (at 30 mN/m) had almost identical diffusion and dissolution values as Alveofact. As a proof of concept, the interaction of the models with PLGA nanoparticles showed promising results in all experiments for all the three surfactant models. The results show that the choice of components in a model play a crucial role in obtaining reproducible results. The selected models can be used for further studies as synthetic in vitro lung models.
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Affiliation(s)
- Julia J Schüer
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Alexej Arndt
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Christian Wölk
- Institute of Pharmacy, Martin Luther University, Wolfgang-Langenbeck-Straße 4, 06210 Halle (Saale), Germany
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, 04317 Leipzig, Germany
| | - Shashank R Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
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16
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Wölk C, Youssef H, Guttenberg T, Marbach H, Vizcay‐Barrena G, Shen C, Brezesinski G, Harvey RD. Phase Diagram for a Lysyl-Phosphatidylglycerol Analogue in Biomimetic Mixed Monolayers with Phosphatidylglycerol: Insights into the Tunable Properties of Bacterial Membranes. Chemphyschem 2020; 21:702-706. [PMID: 32065707 PMCID: PMC7216935 DOI: 10.1002/cphc.202000026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/12/2020] [Indexed: 12/13/2022]
Abstract
Ion pairing between the major phospholipids of the Staphylococcus aureus plasma membrane (phosphatidylglycerol - PG and lysyl-phosphatidylglycerol - LPG) confers resistance to antimicrobial peptides and other antibiotics. We developed 3adLPG, a stable synthetic analogue which can substitute for the highy-labile native LPG, in biophysical experiments examining the membrane-protecting role of lipid ion pairing, in S. aureus and other important bacteria. Here we examine the surface charge and lipid packing characteristics of synthetic biomimetic mixtures of DPPG and DP3adLPG in Langmuir monolayers, using a combination of complementary surface-probing techniques such as infrared reflection-absorption spectroscopy and grazing-incidence x-ray diffraction. The resultant phase diagram for the ion paired lipids sheds light on the mixing behavior of lipids in monolayer models of resistant phenotype bacterial membranes, and provides a platform for future biophysical studies.
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Affiliation(s)
- Christian Wölk
- Institute of PharmacyLeipzig UniversityBrüderstraße 3404103LeipzigGermany
| | - Hala Youssef
- Department of Chemistry and BiochemistryConcordia University7141 Sherbrooke Street WestMontrealCanada
| | - Thomas Guttenberg
- Institute of PharmacyMartin-Luther-University Halle-WittenbergKurt-Mothes-Str. 306120Halle (Saale)Germany
| | - Helene Marbach
- Institute of MicrobiologyUniversity of Veterinary MedicineVeterinärplatz 11210ViennaAustria
| | - Gema Vizcay‐Barrena
- Centre for Ultrastructural ImagingKing's College LondonGuy's CampusLondonSE1 1ULUK
| | - Chen Shen
- DESY Photon Science22607HamburgGermany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and InterfacesAm Mühlenberg 114476PotsdamGermany
| | - Richard D. Harvey
- Institute of PharmacyMartin-Luther-University Halle-WittenbergKurt-Mothes-Str. 306120Halle (Saale)Germany
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17
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Husteden C, Doberenz F, Goergen N, Pinnapireddy SR, Janich C, Langner A, Syrowatka F, Repanas A, Erdmann F, Jedelská J, Bakowsky U, Groth T, Wölk C. Contact-Triggered Lipofection from Multilayer Films Designed as Surfaces for in Situ Transfection Strategies in Tissue Engineering. ACS Appl Mater Interfaces 2020; 12:8963-8977. [PMID: 32003972 DOI: 10.1021/acsami.9b18968] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Biomaterials, which release active compounds after implantation, are an essential tool for targeted regenerative medicine. In this study, thin multilayer films loaded with lipid/DNA complexes (lipoplexes) were designed as surface coatings for in situ transfection applicable in tissue engineering and regenerative medicine. The film production and embedding of lipoplexes were based on the layer-by-layer (LbL) deposition technique. Hyaluronic acid (HA) and chitosan (CHI) were used as the polyelectrolyte components. The embedded plasmid DNA was complexed using a new designed cationic lipid formulation, namely, OH4/DOPE 1/1, the advantageous characteristics of which have been proven already. Three different methods were tested regarding its efficiency of lipid and DNA deposition. Therefore, several surface specific analytics were used to characterize the LbL formation, the lipid DNA embedding, and the surface characteristics of the multilayer films, such as fluorescence microscopy, surface plasmon resonance spectroscopy, ellipsometry, zeta potential measurements, atomic force microscopy, and scanning electron microscopy. Interaction studies were conducted for optimized lipoplex-loaded polyelectrolyte multilayers (PEMs) that showed an efficient attachment of C2C12 cells on the surface. Furthermore, no acute toxic effects were found in cell culture studies, demonstrating biocompatibility. Cell culture experiments with C2C12 cells, a cell line which is hard to transfect, demonstrated efficient transfection of the reporter gene encoding for green fluorescent protein. In vivo experiments using the chicken embryo chorion allantois membrane animal replacement model showed efficient gene-transferring rates in living complex tissues, although the DNA-loaded films were stored over 6 days under wet and dried conditions. Based on these findings, it can be concluded that OH4/DOPE 1/1 lipoplex-loaded PEMs composed of HA and CHI can be an efficient tool for in situ transfection in regenerative medicine.
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Affiliation(s)
- Catharina Husteden
- Institute of Pharmacy, Department of Medicinal Chemistry , Martin Luther University Halle-Wittenberg , Wolfgang-Langenbeck-Str. 4 , 06120 Halle (Saale) , Germany
| | - Falko Doberenz
- Institute of Pharmacy, Department Biomedical Materials , Martin Luther University Halle-Wittenberg , Heinrich-Damerow-Str. 4 , 06120 Halle (Saale) , Germany
| | - Nathalie Goergen
- Department of Pharmaceutics and Biopharmaceutics , University of Marburg , Robert-Koch-Str. 4 , 35037 Marburg , Germany
| | - Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics , University of Marburg , Robert-Koch-Str. 4 , 35037 Marburg , Germany
| | - Christopher Janich
- Institute of Pharmacy, Department of Medicinal Chemistry , Martin Luther University Halle-Wittenberg , Wolfgang-Langenbeck-Str. 4 , 06120 Halle (Saale) , Germany
| | - Andreas Langner
- Institute of Pharmacy, Department of Medicinal Chemistry , Martin Luther University Halle-Wittenberg , Wolfgang-Langenbeck-Str. 4 , 06120 Halle (Saale) , Germany
| | - Frank Syrowatka
- Interdisciplinary Center of Materials Science , Martin-Luther-University Halle-Wittenberg , Heinrich-Damerow-Str. 4 , 06120 Halle (Saale) , Germany
| | - Alexandros Repanas
- Institute of Pharmacy, Department Biomedical Materials , Martin Luther University Halle-Wittenberg , Heinrich-Damerow-Str. 4 , 06120 Halle (Saale) , Germany
| | - Frank Erdmann
- Institute of Pharmacy, Department of Pharmacology , Martin Luther University Halle-Wittenberg , Wolfgang-Langenbeck-Str. 4 , 06120 Halle (Saale) , Germany
| | - Jarmila Jedelská
- Department of Pharmaceutics and Biopharmaceutics , University of Marburg , Robert-Koch-Str. 4 , 35037 Marburg , Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics , University of Marburg , Robert-Koch-Str. 4 , 35037 Marburg , Germany
| | - Thomas Groth
- Institute of Pharmacy, Department Biomedical Materials , Martin Luther University Halle-Wittenberg , Heinrich-Damerow-Str. 4 , 06120 Halle (Saale) , Germany
- Interdisciplinary Center of Materials Science , Martin-Luther-University Halle-Wittenberg , Heinrich-Damerow-Str. 4 , 06120 Halle (Saale) , Germany
- Laboratory of Biomedical Nanotechnologies, Institute of Bionic Technologies and Engineering , I.M. Sechenov First Moscow State University , Trubetskaya Street 8 , 119991 Moscow , Russian Federation
| | - Christian Wölk
- Institute of Pharmacy, Department of Medicinal Chemistry , Martin Luther University Halle-Wittenberg , Wolfgang-Langenbeck-Str. 4 , 06120 Halle (Saale) , Germany
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine , Leipzig University , 04317 Leipzig , Germany
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18
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Schüer JJ, Wölk C, Bakowsky U, Pinnapireddy SR. Comparison of Tanaka lipid mixture with natural surfactant Alveofact to study nanoparticle interactions on Langmuir film balance. Colloids Surf B Biointerfaces 2019; 188:110750. [PMID: 31884081 DOI: 10.1016/j.colsurfb.2019.110750] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 12/03/2019] [Accepted: 12/20/2019] [Indexed: 12/26/2022]
Abstract
Upon inhalation, nanoparticles enter the lungs where the pulmonary surfactant forms the first point of contact and plays a pivotal role for the subsequent absorption into the body. This can lead to interactions that alter the biophysical function of the surfactant monolayer. Therefore, a reliable prediction of the interaction is desired. In this study, we compared the behaviour of an artificial surfactant model with that of a natural surfactant upon exposure to chitosan nanoparticles. To simulate the physiology of the lungs, the surfactant monolayers were placed at an air/aqueous interface of a Langmuir film balance. Based on the data obtained from the experiments, the chitosan nanoparticles first integrated into the monolayer of the natural surfactant and then interact strongly with its compounds thereby moving out of the monolayer. The topographic changes in the monolayer were determined by atomic force microscopy analysis. Using this technique, the nanoparticle localisation on the monolayer could be studied. No visible interaction was observed with the artificial surfactant from surface pressure-time isotherms and atomic force microscopy analysis. Incomplete miscibility lead to instability of the artificial surfactant which left behind a DPPC rich monolayer after nanoparticle interaction. It was not stable enough to see a possible interaction (i.e. change in surface pressure) with the nanoparticles directly. These results should help understand the interactions of lipids among themselves and with the nanoparticles. Furthermore, it should help generate an efficient artificial surfactant model and to understand the underlying mechanisms of the nanoparticle interaction with the monolayer.
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Affiliation(s)
- Julia Janina Schüer
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Christian Wölk
- Institute of Pharmacy, Martin Luther University, Wolfgang-Langenbeck-Straße 4, 06210 Halle (Saale), Germany; Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, Leipzig University, Eilenburger Strasse 15a, Leipzig, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany.
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19
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Pinnapireddy SR, Giselbrecht J, Strehlow B, Janich C, Husteden C, Meister A, Loppnow H, Sedding D, Erdmann F, Hause G, Brezesinski G, Groth T, Langner A, Bakowsky U, Wölk C. A triple chain polycationic peptide-mimicking amphiphile - efficient DNA-transfer without co-lipids. Biomater Sci 2019; 8:232-249. [PMID: 31681923 DOI: 10.1039/c9bm01093a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Non-viral gene delivery in its current form is largely dependent upon the ability of a delivery vehicle to protect its cargo in the extracellular environment and release it efficiently inside the target cell. Also a simple delivery system is required to simplify a GMP conform production if a marketing authorization is striven for. This work addresses these problems. We have developed a synthetic polycationic peptide-mimicking amphiphile, namely DiTT4, which shows efficient transfection rates and good biocompatibility without the use of a co-lipid in the formulation. The lipid-nucleic acid complex (lipoplex) was characterized at the structural (electron microscopy), physical (laser Doppler velocimetry and atomic force microscopy) and molecular levels (X-ray scattering). Stability studies of the lipoplexes in the presence of serum and heparin indicated a stable formation capable of protecting the cargo against the extracellular milieu. Hemocompatibility studies (hemolysis, complement activation and erythrocyte aggregation) demonstrated the biocompatibility of the formulation for systemic administration. The transfection efficiency was assessed in vitro using the GFP assay and confocal laser scanning microscopy studies. With the chorioallantoic membrane model, an animal replacement model according to the 3R strategy (replacement, refinement, and reduction), initial in vivo experiments were performed which demonstrate fast and efficient transfection in complex tissues and excellent biocompatibility.
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Affiliation(s)
- Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037, Marburg, Germany.
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20
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Wölk C, Hause G, Gutowski O, Harvey RD, Brezesinski G. Enhanced chain packing achieved via putative headgroup ion-triplet formation in binary anionic lipid/cationic surfactant mixed monolayers. Chem Phys Lipids 2019; 225:104827. [DOI: 10.1016/j.chemphyslip.2019.104827] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/16/2019] [Accepted: 09/17/2019] [Indexed: 11/25/2022]
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21
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Stefaniu C, Wölk C, Brezesinski G, Schneck E. Relationship between structure and molecular interactions in monolayers of specially designed aminolipids. Nanoscale Adv 2019; 1:3529-3536. [PMID: 36133531 PMCID: PMC9418614 DOI: 10.1039/c9na00355j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 07/23/2019] [Indexed: 05/05/2023]
Abstract
Artificial cationic lipids are already recognized as highly efficient gene therapy tools. Here, we focus on another potential use of aminolipids, in their electrically-uncharged state, for the formation of covalently cross-linked, one-molecule-thin films at interfaces. Such films are envisioned for future (bio-)materials applications. To this end, Langmuir monolayers of structurally different aminolipids are comprehensively characterized with the help of highly sensitive surface characterization techniques. Pressure-area isotherms, Brewster angle microscopy, grazing-incidence X-ray diffraction and infrared reflection-absorption spectrometry experiments provide a detailed, comparative molecular picture of the formed monolayers. This physico-chemical study highlights the relationship between chemical structures and intermolecular interactions, which can serve as a basis for the rational design of cross-linked thin films with precisely controlled properties.
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Affiliation(s)
- Cristina Stefaniu
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
| | - Christian Wölk
- Institute of Pharmacy, Research Group Biochemical Pharmacy, Martin-Luther-University Wolfgang-Langenbeck-Strasse 4 06120 Halle (Saale) Germany
| | - Gerald Brezesinski
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
| | - Emanuel Schneck
- Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
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22
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Pawlowska D, Janich C, Langner A, Dobner B, Wölk C, Brezesinski G. The Impact of Alkyl-Chain Purity on Lipid-Based Nucleic Acid Delivery Systems - Is the Utilization of Lipid Components with Technical Grade Justified? Chemphyschem 2019; 20:2110-2121. [PMID: 31265754 PMCID: PMC6771585 DOI: 10.1002/cphc.201900480] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/29/2019] [Indexed: 11/17/2022]
Abstract
The physicochemical properties and transfection efficacies of two samples of a cationic lipid have been investigated and compared in 2D (monolayers at the air/liquid interface) and 3D (aqueous bulk dispersions) model systems using different techniques. The samples differ only in their chain composition due to the purity of the oleylamine (chain precursor). Lipid 8 (using the oleylamine of technical grade for cost-efficient synthesis) shows lateral phase separation in the Langmuir layers. However, the amount of attached DNA, determined by IRRAS, is for both samples the same. In 3D systems, lipid 8 p forms cubic phases, which disappear after addition of DNA. At physiological temperatures, both lipids (alone and in mixture with cholesterol) assemble to lamellar aggregates and exhibit comparable DNA delivery efficiency. This study demonstrates that non-lamellar structures are not compulsory for high transfection rates. The results legitimate the utilization of oleyl chains of technical grade in the synthesis of cationic transfection lipids.
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Affiliation(s)
- Dorota Pawlowska
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-GolmAm Mühlenberg 114476PotsdamGermany
- Warsaw University of Technology, Faculty of ChemistryInstitute of Biotechnologyul. Noakowskiego 300-664WarsawPoland
| | - Christopher Janich
- Martin Luther University Halle-WittenbergInstitute of Pharmacy, Research Group Biochemical PharmacyWolfgang-Langenbeck-Str. 406120 Halle (Saale)Germany
| | - Andreas Langner
- Martin Luther University Halle-WittenbergInstitute of Pharmacy, Research Group Biochemical PharmacyWolfgang-Langenbeck-Str. 406120 Halle (Saale)Germany
| | - Bodo Dobner
- Martin Luther University Halle-WittenbergInstitute of Pharmacy, Research Group Biochemical PharmacyWolfgang-Langenbeck-Str. 406120 Halle (Saale)Germany
| | - Christian Wölk
- Martin Luther University Halle-WittenbergInstitute of Pharmacy, Research Group Biochemical PharmacyWolfgang-Langenbeck-Str. 406120 Halle (Saale)Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-GolmAm Mühlenberg 114476PotsdamGermany
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23
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Tassler S, Pawlowska D, Janich C, Giselbrecht J, Drescher S, Langner A, Wölk C, Brezesinski G. Lysine-based amino-functionalized lipids for gene transfection: 3D phase behaviour and transfection performance. Phys Chem Chem Phys 2019; 20:17393-17405. [PMID: 29911233 DOI: 10.1039/c8cp01922c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on previous work, the influence of the chain composition on the physical-chemical properties of five new transfection lipids (TH10, TT10, OH10, OT10 and OO10) containing the same lysine-based head group has been investigated in aqueous dispersions. For this purpose, the chain composition has been gradually varied from saturated tetradecyl (T, C14:0) and hexadecyl (H, C16:0) chains to longer but unsaturated oleyl (O, C18:1) chains with double bonds in the cis configuration. In this work, the lipid dispersions have been investigated in the absence and presence of the helper lipid DOPE and calf thymus DNA by small-angle and wide-angle X-ray scattering (SAXS/WAXS) supplemented by differential scanning calorimetry (DSC), attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and Fourier-transform Raman spectroscopy (FTRS). Lamellar and inverted hexagonal mesophases have been observed in single-component systems. In the binary mixtures, the aggregation behaviour changes with an increasing amount of DOPE from lamellar to cubic. The lipid mixtures with DNA show a panoply of mesophases. Interestingly, TT10 and OT10 form cubic lipoplexes, whereas OO10 complexes the DNA sandwich-like between lipid bilayers in a lamellar lipoplex. Surprisingly, the latter is the most effective lipoplex.
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Affiliation(s)
- Stephanie Tassler
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany.
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24
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Tassler S, Dobner B, Lampp L, Ziółkowski R, Malinowska E, Wölk C, Brezesinski G. DNA Delivery Systems Based on Peptide-Mimicking Cationic Lipids-The Effect of the Co-Lipid on the Structure and DNA Binding Capacity. Langmuir 2019; 35:4613-4625. [PMID: 30840475 PMCID: PMC6727600 DOI: 10.1021/acs.langmuir.8b04139] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/27/2019] [Indexed: 06/09/2023]
Abstract
In continuation of previous work, we present a new promising DNA carrier, OO4, a highly effective peptide-mimicking lysine-based cationic lipid. The structural characteristics of the polynucleotide carrier system OO4 mixed with the commonly used co-lipid DOPE and the saturated phospholipid DPPE have been studied in two-dimensional and three-dimensional model systems to understand their influence on the physical-chemical properties. The phase behavior of pure OO4 and its mixtures with DOPE and DPPE was studied at the air-water interface using a Langmuir film balance combined with infrared reflection-absorption spectroscopy. In bulk, the self-assembling structures in the presence and absence of DNA were determined by small-angle and wide-angle X-ray scattering. The amount of adsorbed DNA to cationic lipid bilayers was measured using a quartz crystal microbalance. The choice of the co-lipid has an enormous influence on the structure and capability of binding DNA. DOPE promotes the formation of nonlamellar lipoplexes (cubic and hexagonal structures), whereas DPPE promotes the formation of lamellar lipoplexes. The correlation of the observed structures with the transfection efficiency and serum stability indicates that OO4/DOPE 1:3 lipoplexes with a DNA-containing cubic phase encapsulated in multilamellar structures seem to be most promising.
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Affiliation(s)
- Stephanie Tassler
- Max
Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg
1, 14476 Potsdam, Germany
| | - Bodo Dobner
- Institute
of Pharmacy, Martin-Luther-University (MLU)
Halle-Wittenberg, Wolfgang-Langenbeck-Straße
4, 06120 Halle (Saale), Germany
| | - Lisa Lampp
- Institute
of Pharmacy, Martin-Luther-University (MLU)
Halle-Wittenberg, Wolfgang-Langenbeck-Straße
4, 06120 Halle (Saale), Germany
| | - Robert Ziółkowski
- Faculty
of Chemistry, Department of Microbioanalytics, The Chair of Medical
Biotechnology, Warsaw University of Technology, ul. Noakowskiego 3, 00-664 Warszawa, Poland
| | - Elżbieta Malinowska
- Faculty
of Chemistry, Department of Microbioanalytics, The Chair of Medical
Biotechnology, Warsaw University of Technology, ul. Noakowskiego 3, 00-664 Warszawa, Poland
| | - Christian Wölk
- Institute
of Pharmacy, Martin-Luther-University (MLU)
Halle-Wittenberg, Wolfgang-Langenbeck-Straße
4, 06120 Halle (Saale), Germany
| | - Gerald Brezesinski
- Max
Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg
1, 14476 Potsdam, Germany
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25
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Tassler S, Pawlowska D, Janich C, Dobner B, Wölk C, Brezesinski G. Lysine-based amino-functionalized lipids for gene transfection: the influence of the chain composition on 2D properties. Phys Chem Chem Phys 2018; 20:6936-6944. [PMID: 29464262 DOI: 10.1039/c8cp00047f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The influence of the chain composition on the physical-chemical properties will be discussed for five transfection lipids containing the same lysine-based head group. For this purpose, the chain composition will be gradually varied from saturated tetradecyl (C14:0) and hexadecyl (C16:0) chains to longer but unsaturated oleyl (C18:1) chains with double bonds in the cis configuration. In this work, we investigated the lipids as Langmuir monolayers at the air-water-interface in the absence and presence of calf thymus DNA applying different techniques such as infrared reflection absorption spectroscopy (IRRAS) and grazing incidence X-ray diffraction (GIXD). The replacement of saturated tetradecyl (C14:0) and hexadecyl (C16:0) chains by unsaturated oleyl (C18:1) chains increases the fluidity of the lipid monolayer: TH10 < TT10 < OH10 < OT10 < OO10 resulting in a smaller packing density. TH10 forms the stiffest and OO10 the most fluid monolayer in this structure-property study. OO10 has a higher protonation degree compared to the saturated lipids TT10 and TH10 as well as to the hybrids OT10 and OH10 because of a better accessibility of the amine groups. Depending on the bulk pH, different scenarios of DNA coupling to the lipid monolayers have been proposed.
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Affiliation(s)
- Stephanie Tassler
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany.
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26
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Abstract
Colloidal nucleic acid carrier systems based on cationic lipids are a promising pharmaceutical tool in the implementation of gene therapeutic strategies. This study demonstrates the complex behavior of DNA at the lipid-solvent interface facilitating structural changes of the lyotropic liquid-crystalline phases. For this study, the structural properties of six malonic acid based cationic lipids were determined using small- and wide-angle X-ray scattering (SAXS and WAXS) as well as differential scanning calorimetry (DSC). Selected lipids (lipid 3 and lipid 6) with high nucleic acid transfer activity have been investigated in detail because of the strong influence of the zwitterionic helper lipid 1,2-di(9 Z-octadecenoyl)- sn-glycero-3-phosphoethanolamine (DOPE) on the structural properties as well as of the complex formation of lipid-DNA complexes (lipoplexes). In the case of lipid 3, DNA stabilizes a metastable cubic mesophase with Im3 m symmetry and an Im3 m Qαc lipoplex is formed, which is rarely described for DNA lipoplexes in literature. In the case of lipid 6, a cubic mesophase with Im3 m symmetry turns into a fluid lamellar phase while mixing with DOPE and complexing DNA.
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Affiliation(s)
- Matthias Dittrich
- Max Planck Institute of Colloids and Interfaces , Science Park Potsdam-Golm, Am Mühlenberg 1 , 14476 Potsdam , Germany
| | - Chris Brauer
- Max Planck Institute of Colloids and Interfaces , Science Park Potsdam-Golm, Am Mühlenberg 1 , 14476 Potsdam , Germany
| | - Sergio S Funari
- Photon Science - DESY , Notkestrasse 85 , 22607 Hamburg , Germany
| | - Bodo Dobner
- Institute of Pharmacy, Research Group Biochemical Pharmacy , Martin-Luther-University , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces , Science Park Potsdam-Golm, Am Mühlenberg 1 , 14476 Potsdam , Germany
| | - Christian Wölk
- Institute of Pharmacy, Research Group Biochemical Pharmacy , Martin-Luther-University , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
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27
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Giselbrecht J, Janich C, Pinnapireddy SR, Hause G, Bakowsky U, Wölk C, Langner A. Overcoming the polycation dilemma - Explorative studies to characterise the efficiency and biocompatibility of newly designed lipofection reagents. Int J Pharm 2018; 541:81-92. [PMID: 29462683 DOI: 10.1016/j.ijpharm.2018.02.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 02/05/2018] [Accepted: 02/16/2018] [Indexed: 01/05/2023]
Abstract
In this explorative study of the novel cationic lipid OO4 in two different formulations the complex formation with DNA, the biopharmaceutical stability of the lipid/DNA complexes in physiological media, and the transfection efficiency were analysed. We investigated liposomes composed of two binary mixtures of OO4 with either DOPE or DPPE as co-lipids in the molar ratio of 1:3. These formulations were compared with regard to their ability to bind the DNA using gel retardation electrophoresis, ethidium bromide exclusion and zeta potential measurements. Colloidal stability of the lipoplexes in foetal bovine serum (FBS) and the protective effect against degradation by endonucleases were studied. Furthermore, the influence of different salt concentrations on the complex formation with DNA was examined. The DOPE mixture was markedly superior compared to the DPPE mixture. Finally, haemocompatibility studies and gene silencing experiments were performed on OO4:DOPE 1:3 (n:n). The experiments demonstrate that the lipoplex formulation OO4:DOPE 1:3 (n:n) at N/P 4 is a promising candidate for systemic application because of the high colloidal stability in serum without PEGylated lipids, high transfection efficiency, superior resistance against nucleases, reproducible complexation independent of ionic effects, and haemocompatibility.
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Affiliation(s)
- Julia Giselbrecht
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Christopher Janich
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Shashank Reddy Pinnapireddy
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Strasse 4, 35037 Marburg, Germany
| | - Gerd Hause
- Martin Luther University Halle-Wittenberg, Biocenter, Weinbergweg 22, 06120 Halle, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Strasse 4, 35037 Marburg, Germany
| | - Christian Wölk
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany.
| | - Andreas Langner
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
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28
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Tassler S, Wölk C, Janich C, Dobner B, Brezesinski G. Lysine-based amino-functionalized lipids for gene transfection: the protonation state in monolayers at the air-liquid interface. Phys Chem Chem Phys 2018; 19:20271-20280. [PMID: 28726909 DOI: 10.1039/c7cp03107f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Cationic lipids are considered as non-viral carriers for genetic material used in gene therapy. They have no carcinogenic potential and cause low immune response compared to existing viral systems. The protonation degree of these cationic lipids is a crucial parameter for the binding behavior of polynucleotides (e.g., DNA). Newly synthesized peptide-mimic lysine-based amino-functionalized lipids have been investigated in 2D models as monolayers at the air-liquid interface. Standard surface pressure - area isotherms have been measured to prove the layer stability. Total reflection X-ray fluorescence (TRXF) has been used as a surface sensitive analytical method to estimate the amount of counterions at the head groups. Using a standard sample as a reference, the protonation degree of these cationic lipids can be quantified on buffers with different pH values. It is found that the protonation degree depends linearly on the packing density of the lipid monolayer.
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Affiliation(s)
- Stephanie Tassler
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany.
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29
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Janich C, Hädicke A, Bakowsky U, Brezesinski G, Wölk C. Interaction of DNA with Cationic Lipid Mixtures-Investigation at Langmuir Lipid Monolayers. Langmuir 2017; 33:10172-10183. [PMID: 28873311 DOI: 10.1021/acs.langmuir.7b02014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Four different binary lipid mixtures composed of a cationic lipid and the zwitterionic colipids DOPE or DPPC, which show different DNA transfer activities in cell culture models, were investigated at the soft air/water interface to identify transfection efficiency determining characteristics. Langmuir films are useful models to investigate the interaction between DNA and lipid mixtures in a two-dimensional model system by using different surface sensitive techniques, namely, epifluorescence microscopy and infrared reflection-absorption spectroscopy. Especially, the effect of adsorbed DNA on the properties of the lipid mixtures has been examined. Distinct differences between the lipid composites were found which are caused by the different colipids of the mixtures. DOPE containing lipid mixtures form fluid monolayers with a uniform distribution of the fluorescent probe in the presence and absence of DNA at physiologically relevant surface pressures. Only at high nonphysiological pressures, the lipid monolayer collapses and phase separation was observed if DNA was present in the subphase. In contrast, DPPC containing lipid mixtures show domains in the liquid condensed phase state in the presence and absence of DNA in the subphase. The adsorption of DNA at the positively charged mixed lipid monolayer induces phase separation which is expressed in the morphology and the point of appearance of these domains.
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Affiliation(s)
- Christopher Janich
- Martin Luther University Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - André Hädicke
- CUO-Recherche, Hôpital du Saint-Sacrement, Centre de recherche du CHU de Québec and Département d'ophtalmologie, Faculté de médecine, and Regroupement stratégique PROTEO, Université Laval , Québec, Québec, Canada
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University Marburg , Ketzerbach 63, 35037 Marburg, Germany
| | - Gerald Brezesinski
- Max-Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm , Am Muehlenberg 1, 14476 Potsdam, Germany
| | - Christian Wölk
- Martin Luther University Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
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Wölk C, Janich C, Bakowsky U, Langner A, Brezesinski G. Malonic acid based cationic lipids - The way to highly efficient DNA-carriers. Adv Colloid Interface Sci 2017; 248:20-34. [PMID: 28842122 DOI: 10.1016/j.cis.2017.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 08/10/2017] [Accepted: 08/10/2017] [Indexed: 01/21/2023]
Abstract
Cationic lipids play an important role as non-viral nucleic acid carriers in gene therapy since 3 decades. This review will introduce malonic acid derived cationic lipids as nucleic acid carriers which appeared in the literature dealing with lipofection 10years ago. The family of amino-functionalized branched fatty acid amides will be presented as well as different generations of malonic acid diamides. Both groups of cationic lipids yield lipid mixtures with highly efficient nucleic acid transfer activities in in-vitro cell culture models. The DNA transfer screening of lipid libraries with directed structural variations in the lipophilic as well as in the hydrophilic part of the amphiphiles yields structure/activity relationships. Furthermore, the detailed characterizations of selected lipid composites at the air/water interface and in bulk systems are summarized with regard to transfection determining physical-chemical properties. The findings are also discussed in comparison to results obtained with other families of cationic lipids.
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Affiliation(s)
- Christian Wölk
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle, Saale, Germany.
| | - Christopher Janich
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle, Saale, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University Marburg, Robert-Koch-Straße 4, 35037 Marburg, Germany
| | - Andreas Langner
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle, Saale, Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany.
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Janich C, Taßler S, Meister A, Hause G, Schäfer J, Bakowsky U, Brezesinski G, Wölk C. Structures of malonic acid diamide/phospholipid composites and their lipoplexes. Soft Matter 2016; 12:5854-66. [PMID: 27328379 DOI: 10.1039/c6sm00807k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
As a continuation of previous work, the self-assembly process of cationic lipid formulations in the presence and absence of DNA was investigated with respect to binary lipid mixtures suitable as polynucleotide carrier systems. The lipid blends consist of one malonic-acid-based cationic lipid with a varying alkyl chain pattern, either N-{6-amino-1-[N-(9Z)-octadec-9-enylamino]-1-oxohexan-(2S)-2-yl}-N'-{2-[N,N-bis(2-aminoethyl)amino]ethyl}-2-hexadecylpropandiamide () or N-[6-amino-1-oxo-1-(N-tetradecylamino)hexan-(2S)-2-yl]-N'-{2-[N,N-bis(2-aminoethyl)amino]ethyl}-2-hexadecylpropandiamide (), and one neutral co-lipid, either 1,2-di-[(9Z)-octadec-9-enoyl]-sn-glycero-3-phosphocholine (DOPE) or 1,2-di-(hexadecanoyl)-sn-glycero-3-phosphocholine (DPPC). Although the cationic lipids exhibit only slight differences in their structure, the DNA transfer efficiency varies drastically. Therefore, self-assembly was studied in 3D systems by small- and wide-angle X-ray scattering (SAXS and WAXS) and transmission electron microscopy (TEM) as well as in 2D systems by infrared reflection-absorption spectroscopy (IRRAS) on Langmuir films. The investigated lipid mixtures show quite different self-assembly in the absence of DNA, with varying structures from vesicles (/DOPE; /DOPE) and tubes (/DOPE) to discoid structures (/DPPC; /DPPC). Twisted ribbons and sheets, which were stabilized due to hydrogen-bond networks, were found in all investigated lipid mixtures in the absence of DNA. The addition of DNA leads to the formation of lamellar lipoplexes for all the investigated lipid compositions. The lipoplexes differ in crucial parameters, such as the lamellar repeat distance and the spacing between the DNA strands, indicating differences in the binding strength between DNA and the lipid composition. The formation of associates with an ideal charge density might emerge as a key parameter for efficient DNA transfer. Furthermore, the structures observed for the different lipid compositions in the absence of DNA prepare the way for other applications besides gene therapy.
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Affiliation(s)
- Christopher Janich
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle, Saale, Germany. and Philipps University Marburg, Department of Pharmaceutical Technology and Biopharmacy, Ketzerbach 63, 35037 Marburg, Germany
| | - Stephanie Taßler
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Annette Meister
- Martin Luther University Halle-Wittenberg, Institute of Chemistry, Physical Chemistry and Institute of Biochemistry and Biotechnology, von-Danckelmann-Platz 4, 06120 Halle, Saale, Germany
| | - Gerd Hause
- Martin Luther University Halle-Wittenberg, Biocenter, Weinbergweg 22, 06120 Halle, Saale, Germany
| | - Jens Schäfer
- Philipps University Marburg, Department of Pharmaceutical Technology and Biopharmacy, Ketzerbach 63, 35037 Marburg, Germany
| | - Udo Bakowsky
- Philipps University Marburg, Department of Pharmaceutical Technology and Biopharmacy, Ketzerbach 63, 35037 Marburg, Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Christian Wölk
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle, Saale, Germany.
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Wölk C, Janich C, Meister A, Drescher S, Langner A, Brezesinski G, Bakowsky U. Investigation of Binary Lipid Mixtures of a Three-Chain Cationic Lipid with Phospholipids Suitable for Gene Delivery. Bioconjug Chem 2015; 26:2461-73. [PMID: 26471337 DOI: 10.1021/acs.bioconjchem.5b00505] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the present work, we characterize binary lipid mixtures consisting of a three-chain amino-functionalized cationic lipid (DiTT4) with different phospholipids, namely, 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE), 1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine (DMPE), or 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC). The mixing behavior was investigated by differential scanning calorimetry (DSC). Additionally, aqueous dispersions of the binary mixtures were characterized by means of dynamic light scattering (DLS), laser Doppler electrophoresis, and transmission electron microscopy (TEM) to get further information about particle size, charge, and shape. The complex formation between different binary lipid mixtures and plasmid DNA (pDNA) was investigated by zeta-(ζ)-potential (laser Doppler electrophoresis) and DLS measurements, and the lipid/DNA complexes (lipoplexes) were screened for efficient DNA transfer (transfection) in cell culture. Finally, efficient lipid compositions were investigated with respect to serum stability. This work provides a detailed characterization of the cationic lipid mixtures as foundation for further research. Efficient gene transfer in the presence of serum was demonstrated for selected lipoplexes showing their capability to be used as high-potency gene delivery vehicles.
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Affiliation(s)
- Christian Wölk
- Philipps University Marburg , Department of Pharmaceutical Technology and Biopharmaceutics, Ketzerbach 63, 35037 Marburg, Germany.,Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Christopher Janich
- Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Annette Meister
- MLU Halle-Wittenberg , Center for Structure and Dynamics of Proteins (MZP), Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Simon Drescher
- Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Andreas Langner
- Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces , Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Udo Bakowsky
- Philipps University Marburg , Department of Pharmaceutical Technology and Biopharmaceutics, Ketzerbach 63, 35037 Marburg, Germany
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Erdmann N, Wölk C, Schulze I, Janich C, Folz M, Drescher S, Dittrich M, Meister A, Vogel J, Groth T, Dobner B, Langner A. Tris(2-aminoethyl)amine-based α-branched fatty acid amides - Synthesis of lipids and comparative study of transfection efficiency of their lipid formulations. Eur J Pharm Biopharm 2015; 96:349-62. [PMID: 26325061 DOI: 10.1016/j.ejpb.2015.08.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 08/21/2015] [Accepted: 08/24/2015] [Indexed: 12/13/2022]
Abstract
The synthesis of a new class of cationic lipids, tris(2-aminoethyl)amine-based α-branched fatty acid amides, is described resulting in a series of lipids with specific variations in the lipophilic as well as the hydrophilic part of the lipids. In-vitro structure/transfection relationships were established by application of complexes of these lipids with plasmid DNA (pDNA) to different cell lines. The α-branched fatty acid amide bearing two tetradecyl chains and two lysine molecules (T14diLys) in mixture with the co-lipid 1,2-di-[(9Z)-octadec-9-enoyl]-sn-glycero-3-phosphoethanolamine (DOPE) (1/2, n/n) exhibits effective pDNA transfer in three different cell lines, namely Hep-G2, A549, and COS-7. The presence of 10% serum during lipoplex incubation of the cells did not affect the transfection efficiency. Based on that, detailed investigations of the complexation of pDNA with the lipid formulation T14diLys/DOPE 1/2 (n/n) were carried out with respect to particle size and charge using dynamic light scattering (DLS), ζ-potential measurements, and transmission electron microscopy (TEM). Additionally, the lipoplex uptake was investigated by confocal laser scanning microscopy (CLSM). Overall, lipoplexes prepared from T14diLys/DOPE 1/2 (n/n) offer large potential as lipid-based polynucleotide carriers and further justify advanced examinations.
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Affiliation(s)
- Nicole Erdmann
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Christian Wölk
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany; Department of Pharmaceutical Technology and Biopharmaceutics, Philipps University Marburg, Ketzerbach 63, 35037 Marburg, Germany.
| | - Ingo Schulze
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Christopher Janich
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Manuela Folz
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Simon Drescher
- Centre for Innovation Competence - HALOmem, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany
| | - Matthias Dittrich
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Annette Meister
- Martin Luther University Halle-Wittenberg, Center for Structure and Dynamics of Proteins (MZP), Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Jürgen Vogel
- Institute of Pharmacy, Biomedical Materials Group, MLU Halle-Wittenberg, Heinrich-Damerow-Str. 4, 06120 Halle (Saale), Germany
| | - Thomas Groth
- Institute of Pharmacy, Biomedical Materials Group, MLU Halle-Wittenberg, Heinrich-Damerow-Str. 4, 06120 Halle (Saale), Germany
| | - Bodo Dobner
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany.
| | - Andreas Langner
- Institute of Pharmacy, Biochemical Pharmacy, Martin Luther University (MLU) Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
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Wölk C, Janich C, Pawlowska D, Drescher S, Meister A, Hause G, Dobner B, Langner A, Brezesinski G. Cover Picture: Lamellar versus Micellar Structures-Aggregation Behavior of a Three-Chain Cationic Lipid Designed for Nonviral Polynucleotide Transfer (ChemPhysChem 10/2015). Chemphyschem 2015. [DOI: 10.1002/cphc.201590051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wölk C, Janich C, Pawlowska D, Drescher S, Meister A, Hause G, Dobner B, Langner A, Brezesinski G. Lamellar versus Micellar Structures-Aggregation Behavior of a Three-Chain Cationic Lipid Designed for Nonviral Polynucleotide Transfer. Chemphyschem 2015; 16:2029. [PMID: 26129690 DOI: 10.1002/cphc.201500468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The front cover artwork is provided by the groups of Prof. Bodo Dobner, Prof. Andreas Langner, and research partners Dr. Gerd Hause, Dr. Simon Drescher, and Dr. Annette Meister (MLU Halle-Wittenberg) as well as the group of Prof. Gerald Brezesinski (MPI of Colloids and Interfaces). The image shows the space-filling model of a three-chain amino-functionalized lipid designed for gene transfer and the preferred pH-dependent aggregates (multilamellar stacks, vesicles, rod-like micelles). The background shows a Cryo-TEM image of rod-like micelles. Read the full text of the article at 10.1002/cphc.201500188.
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Affiliation(s)
- Christian Wölk
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Straße 4, 06120 Halle (Saale) (Germany).
| | - Christopher Janich
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Straße 4, 06120 Halle (Saale) (Germany)
| | - Dorota Pawlowska
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam (Germany)
| | - Simon Drescher
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Straße 4, 06120 Halle (Saale) (Germany)
| | - Annette Meister
- Martin Luther University Halle-Wittenberg, Center for Structure and Dynamics of Proteins (MZP), Weinbergweg 22, 06120 Halle (Saale) (Germany)
| | - Gerd Hause
- Martin Luther University Halle-Wittenberg, Biocenter, Weinbergweg 22, 06120 Halle (Saale) (Germany)
| | - Bodo Dobner
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Straße 4, 06120 Halle (Saale) (Germany)
| | - Andreas Langner
- Martin Luther University Halle-Wittenberg, Institute of Pharmacy, Wolfgang-Langenbeck-Straße 4, 06120 Halle (Saale) (Germany)
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam (Germany)
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Wölk C, Janich C, Pawlowska D, Drescher S, Meister A, Hause G, Dobner B, Langner A, Brezesinski G. Lamellar versus Micellar Structures-Aggregation Behavior of a Three-Chain Cationic Lipid Designed for Nonviral Polynucleotide Transfer. Chemphyschem 2015; 16:2115-26. [DOI: 10.1002/cphc.201500188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 11/06/2022]
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Janich C, Wölk C, Taßler S, Drescher S, Meister A, Brezesinski G, Dobner B, Langner A. Composites of malonic acid diamides and phospholipids - Structural parameters for optimal transfection efficiency in A549 cells. EUR J LIPID SCI TECH 2014. [DOI: 10.1002/ejlt.201300405] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Christopher Janich
- Martin Luther University (MLU) Halle-Wittenberg; Institute of Pharmacy; Halle (Saale) Germany
| | - Christian Wölk
- Martin Luther University (MLU) Halle-Wittenberg; Institute of Pharmacy; Halle (Saale) Germany
| | - Stephanie Taßler
- Max Planck Institute of Colloids and Interfaces; Potsdam Germany
| | - Simon Drescher
- Martin Luther University (MLU) Halle-Wittenberg; Institute of Pharmacy; Halle (Saale) Germany
| | - Annette Meister
- Centre for Structure and Dynamics of Proteins (MZP); MLU Halle-Wittenberg; Halle (Saale) Germany
| | | | - Bodo Dobner
- Martin Luther University (MLU) Halle-Wittenberg; Institute of Pharmacy; Halle (Saale) Germany
| | - Andreas Langner
- Martin Luther University (MLU) Halle-Wittenberg; Institute of Pharmacy; Halle (Saale) Germany
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Wölk C, Pawlowska D, Drescher S, Auerswald A, Meister A, Hause G, Blume A, Langner A, Brezesinski G, Dobner B. New micellar transfection agents. Langmuir 2014; 30:4905-4915. [PMID: 24697720 DOI: 10.1021/la404860w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Two novel micelle-forming amino-functionalized lipids (OT6 and TT6) bearing two alkyl chains connected to a large positively charged hexavalent headgroup, which might be interesting polynucleotide transferring agents with the advantage of an easy and reproducible production of micelle dispersions, have been characterized. The critical micelle concentration (cmc) of both lipids has been determined by two different methods, namely, isothermal titration calorimetry (ITC) and 1,6-diphenyl-1,3,5-hexatriene (DPH) fluorescence experiments. In addition, the lipid dispersions were studied as a function of temperature using differential scanning calorimetry (DSC), dynamic light scattering (DLS), Fourier-transform infrared (FT-IR) spectroscopy, and cryo-transmission electron microscopy (cryo-TEM). The OT6 and TT6 micelles effectively complex DNA as determined by ITC and DSC measurements. In addition, DLS and ζ-potential measurements were performed to determine lipoplex formulations that exhibit colloidal stability. Finally, the structures of OT6/DNA complexes were investigated by means of X-ray scattering and TEM.
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Affiliation(s)
- Christian Wölk
- Institute of Pharmacy, Martin-Luther-Universitaet (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
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Wölk C, Drescher S, Meister A, Blume A, Langner A, Dobner B. General Synthesis and Physicochemical Characterisation of a Series of Peptide-Mimic Lysine-Based Amino-Functionalised Lipids. Chemistry 2013; 19:12824-38. [DOI: 10.1002/chem.201204529] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 06/25/2012] [Indexed: 12/14/2022]
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Dittrich M, Heinze M, Wölk C, Funari SS, Dobner B, Möhwald H, Brezesinski G. Structure-Function Relationships of New Lipids Designed for DNA Transfection. Chemphyschem 2011; 12:2328-37. [DOI: 10.1002/cphc.201100065] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 04/29/2011] [Indexed: 11/12/2022]
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Wölk C, Heinze M, Kreideweiß P, Dittrich M, Brezesinski G, Langner A, Dobner B. Synthesis and DNA transfection properties of new head group modified malonic acid diamides. Int J Pharm 2011; 409:46-56. [DOI: 10.1016/j.ijpharm.2011.02.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 02/14/2011] [Accepted: 02/17/2011] [Indexed: 12/19/2022]
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Abstract
Sleep onset latency was substantially reduced in an experiment for 9 adults when short acoustic stimuli were given in synchrony with the heartbeat compared to a control condition in which the same stimuli were given asynchronously. By the same stimulation technique sleep quality was ameliorated in a group of 10 patients with primary insomnia.
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Affiliation(s)
- M Velden
- Fachbereich Psychologie, Universität Osnabrück, Germany
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Abstract
The interpretation of the 'cardiac cycle time effect', also named 'time-dependent primary bradycardia' by the Laceys, who first observed it, has been controversial in psychophysiology. Unconfounded evidence for the dependence of a vagal effect of psychological stimuli on time of stimulation within the cardiac cycle has been missing to date. An experiment in which the subjects could not anticipate the occurrence of the stimuli (short tones of a specific frequency that had to be counted) was performed. The data reduction procedure secured unambiguous interpretation of the data with respect to time-dependency or no time-dependency. No indication of any kind of cycle time dependency of the vagal effect was found.
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Affiliation(s)
- U Zimmermann
- Department of Psychology, University of Osnabrück, F.R.G
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Velden M, Karemaker JM, Wölk C, Schneider R. Inferring vagal effects on the heart from changes in cardiac cycle length: implications for cycle time-dependency. Int J Psychophysiol 1990; 10:85-93. [PMID: 2269652 DOI: 10.1016/0167-8760(90)90049-j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Since the now classical experiments by Brown and Eccles in 1934, the effect of a stimulation of the vagus nerve on the heart has been derived from changes in the length of cardiac periods. Based on a simple model for the genesis of heartbeats, it is shown that the procedure employed by Brown and Eccles gives a distorted picture of the actual vagal effect. A corrected procedure for inferring the vagal effect from changes in heart period length is proposed. This new procedure is applied to empirical data from animal experiments with direct stimulation of the vagus nerve. It is shown that, if the vagal effect depends on time of stimulation within the cardiac cycle (cycle time-dependency), single vagal effect curves for each time of stimulation within the cycle have to be constructed. Other data reduction procedures are reviewed with respect to their appropriateness for demonstrating cycle time-dependency.
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Abstract
Since a valid non-invasive method for continuously measuring blood pressure is available for the psychophysiological laboratory, a procedure must be found for depicting blood pressure characteristics (systolic, diastolic, pulse pressure) on a real time scale, that is not simply from one heartbeat to the next. Values for blood pressure characteristics are actualized by heartbeats and thus occur at discrete points in time only, quite like values for heart rate. It is being assumed that the conditions for the blood pressure characteristics vary continuously, however, and that a value, actualized by a heartbeat, is representative for a time interval extending halfway before and after the point in time where it occurs. For computing a value for a real time interval it is proposed to weight the blood pressure values according to the amount of time their respective time intervals extend within the real time interval.
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Affiliation(s)
- M Velden
- Department of Psychology, University of Osnabrück, F.R.G
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Abstract
Time-dependent bradycardia, a term introduced by the Laceys (Lacey and Lacey, 1980), refers to the fact that the duration of a cardiac cycle is related to when in that cycle, or the just preceding cycle, certain stimuli occur. Since stimulus effects on heart activity with very short latencies have been known for a long time, the question arises whether the effect is one in its own right, or whether it is simply a result of the new way of data reduction introduced by the Laceys. Theoretically, the effect can be explained without assuming anything beyond the well-known short latency bradycardia often observed upon stimulation. Derivation of the effect from an empirical curve of cardiac activity not related to cycle phase shows that we are not dealing with a new effect.
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