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Simon L, Bellard E, Jouanmiqueou B, Lapinte V, Marcotte N, Devoisselle J, Lamaze C, Rols M, Golzio M, Begu S. Interactions of amphiphilic polyoxazolines formulated or not in lipid nanocapsules with biological systems: Evaluation from membrane models up to in vivo mice epidermis. Eur J Pharm Biopharm 2022; 180:308-318. [DOI: 10.1016/j.ejpb.2022.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 08/29/2022] [Accepted: 10/12/2022] [Indexed: 11/04/2022]
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2
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Kalyanram P, Puri A, Gupta A. Thermotropic effects of PEGylated lipids on the stability of HPPH-encapsulated lipid nanoparticles (LNP). JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 2021; 147:6337-6348. [PMID: 34220293 PMCID: PMC8235917 DOI: 10.1007/s10973-021-10929-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/30/2021] [Indexed: 06/13/2023]
Abstract
In this work, we demonstrate the enhanced thermal and steric stability of lipid-based formulations in the presence of encapsulated HPPH that have demonstrated potential cancer applications in previously presented in vivo studies. Differential scanning calorimeter (DSC) was used to study the phase transitions, and domain formations, and to qualify the thermodynamic properties associated with change in lipid bilayer behavior due to the presence of PEGylated at varying concentrations and sizes, and the encapsulated HPPH molecules. Thermal instability was quantified by dramatic changes in calculated enthalpy, and the shape of the melting peak or calculated half width of melting peak. This systematic study focused on understanding the effects of varying molecular mass and concentrations of PEG polymers in the photopolymerizable lipid DC8, 9PC lipid bilayer matrix for four weeks at room temperature of 25 °C. The major findings include increased thermal stability of the lipid bilayer due to the presence of PEG-2 K and the HPPH that resulted from the van der Waals forces between various molecular species, and the change in bilayer curvature confirmed via mathematical correlations. It is demonstrated that the encapsulation of therapeutics in lipid formulations can alter their overall thermal behavior, and therefore, it is imperative to consider calorimetric effects while designing lipid-based vaccines. The presented research methodologies and findings presented can predict the stability of lipid-based vaccines that are under development such as COVID-19 during their storage, transport, and distribution.
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Affiliation(s)
- Poornima Kalyanram
- Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH 43606 USA
| | - Anu Puri
- RNA Biology Laboratory, National Cancer Institute At Frederick, Frederick, MD 21702 USA
| | - Anju Gupta
- Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH 43606 USA
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3
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Banerjee A, Tam A, Dutt M. Dendronized vesicles: formation, self-organization of dendron-grafted amphiphiles and stability. NANOSCALE ADVANCES 2021; 3:725-737. [PMID: 36133832 PMCID: PMC9419559 DOI: 10.1039/d0na00773k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
Fundamental bacterial functions like quorum sensing can be targeted to replace conventional antibiotic therapies. Nanoparticles or vesicles that bind interfacially to charged biomolecules could be used to block quorum sensing pathways in bacteria. Towards this goal, dendronized vesicles (DVs) encompassing polyamidoamine dendron-grafted amphiphiles (PDAs) and dipalmitoyl-sn-glycero-3-phosphocholine lipids are investigated using the molecular dynamics simulation technique in conjunction with an explicit solvent coarse-grained force field. The key physical factors determining the stability of DVs as a function of the dendron generation and relative concentration are identified. The threshold concentration of each dendron generation that yields stable DVs is determined. Dendrons with lower generations rupture the DVs at high relative concentrations due to the electrostatic repulsions between the terminally protonated amines. Whereas, dendrons with intermediate generations demonstrate a mushroom-to-brush transition. Conformational changes in the dendrons expand the outer DV surface, resulting in instability in the DV bilayer. DVs encompassing dendrons with higher generations incur stresses on the bilayer due to their high charge density and spontaneous curvature. The self-organization of PDAs on the DV surface are examined to understand how the asymmetric stresses are minimized across the bilayer. A set of conditions are determined to be conducive for the formation of a single cluster of PDAs that decorates the DV surface like a mesh. Results from this study can potentially guide the design and synthesis of nanoparticles which target quorum sensing pathways in bacteria towards the prevention and treatment of bacterial infections. Furthermore, these nanoparticles can be used in diverse applications in biomedicine, energy or electronics that require synthetic dendronized cells or the adsorption and transport of charged species.
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Affiliation(s)
- Akash Banerjee
- Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey Piscataway NJ 08854 USA
| | - Acacia Tam
- Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey Piscataway NJ 08854 USA
| | - Meenakshi Dutt
- Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey Piscataway NJ 08854 USA
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Post EJ, Fletcher SP. Controlling the Kinetics of Self-Reproducing Micelles by Catalyst Compartmentalization in a Biphasic System. J Org Chem 2019; 84:2741-2755. [PMID: 30698970 PMCID: PMC6459585 DOI: 10.1021/acs.joc.8b03149] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Indexed: 01/24/2023]
Abstract
Compartmentalization of reactions is ubiquitous in biochemistry. Self-reproducing lipids are widely studied as chemical models of compartmentalized biological systems. Here, we explore the effect of catalyst location on copper-catalyzed azide-alkyne cycloadditions which drive the self-reproduction of micelles from phase-separated components. Tuning the hydrophilicity of the copper-ligand complex, so that hydro-phobic or -philic catalysts are used in combination with hydro-philic and -phobic coupling partners, provides a wide range of reactivity patterns. Analysis of the kinetic data shows that reactions with a hydrophobic catalyst are faster than with a hydrophilic catalyst. Diffusion-ordered spectroscopy experiments suggest compartmentalization of the hydrophobic catalyst inside micelles while the hydrophilic catalyst remains in the bulk aqueous phase. The autocatalytic effects observed can be tuned by varying reactant structure and coupling a hydrophilic alkyne and hydrophobic azide results in a more pronounced autocatalytic effect. We propose and test a model that rationalizes the observations in terms of the phase behavior of the reaction components and catalysts.
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Affiliation(s)
- Elias
A. J. Post
- Department of Chemistry,
Chemistry Research Laboratory, University
of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
| | - Stephen P. Fletcher
- Department of Chemistry,
Chemistry Research Laboratory, University
of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, U.K.
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Ahmed S, Matsumura K, Hamada T. Hydrophobic Polyampholytes and Nonfreezing Cold Temperature Stimulate Internalization of Au Nanoparticles to Zwitterionic Liposomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1740-1748. [PMID: 29936842 DOI: 10.1021/acs.langmuir.8b00920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanomedicine relies on the effective internalization of nanoparticles combined with polymeric nanocarriers into living cells. Thus, exploration of internalization is essential for improving the efficacy of nanoparticle-based strategies in clinical practice. Here, we investigated the physicochemical internalization of gold nanoparticles (AuNPs) conjugated with hydrophobic polyampholytes into cell-sized liposomes at a low but nonfrozen temperature. The hydrophobic polyampholytes localized in the disordered phase of the membrane, and internalization of AuNPs was enhanced in the presence of hydrophobic polyampholytes together with incubation at -3 °C as compared to 25 °C. These results contribute toward a mechanistic understanding for developing a model nanomaterials-driven delivery system based on hydrophobic polyampholytes and low temperature.
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Affiliation(s)
- Sana Ahmed
- School of Materials Science , Japan Advanced Institute of Science and Technology , Nomi , Ishikawa 923-1292 , Japan
| | - Kazuaki Matsumura
- School of Materials Science , Japan Advanced Institute of Science and Technology , Nomi , Ishikawa 923-1292 , Japan
| | - Tsutomu Hamada
- School of Materials Science , Japan Advanced Institute of Science and Technology , Nomi , Ishikawa 923-1292 , Japan
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Paolino D, Accolla ML, Cilurzo F, Cristiano MC, Cosco D, Castelli F, Sarpietro MG, Fresta M, Celia C. Interaction between PEG lipid and DSPE/DSPC phospholipids: An insight of PEGylation degree and kinetics of de-PEGylation. Colloids Surf B Biointerfaces 2017; 155:266-275. [PMID: 28460301 DOI: 10.1016/j.colsurfb.2017.04.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 04/06/2017] [Accepted: 04/10/2017] [Indexed: 11/27/2022]
Abstract
The degree to which liposomes are PEGylated is the feature, which most influences the length of the presence of stealth liposomes in the bloodstream. In order to thoroughly investigate the maximum amount of DSPE-PEG2000 that can be used to stabilize stealth liposomes, these were synthesized at different concentrations of DSPE-PEG2000 and their physicochemical properties were investigated by using differential scanning calorimetry (DSC). The kinetics of PEGylation and de-PEGylation were performed by incubating non-stealth liposomes in a DSPE-PEG2000 suspension at different incubation times, and then analyzing the data using DSC and dynamic light scattering (DLS) techniques. The results demonstrated that DSPE-PEG2000 was self-assembled in the phospholipid bilayers, thus forming stealth liposomes. The different amounts of DSPE-PEG2000 in the bilayer triggered a de-PEGylation phenomenon, resulting in mixed nanoaggregates, which derived from the detergent-like properties of the PEGylated phospholipids.
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Affiliation(s)
- Donatella Paolino
- Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy; IRC-FSH-Interregional Research Center for Food Safety & Health, University of Catanzaro "Magna Græcia", Building of BioSciences, V.le Europa, I- 88100 Germaneto, Catanzaro, CZ, Italy
| | - Maria Lorena Accolla
- Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy; Department of Drug Sciences, University of Catania, V.le A. Doria 6, I - 95125 Catania, Italy
| | - Felisa Cilurzo
- Department of Pharmacy, University of Chieti - Pescara "G. d'Annunzio", Via dei Vestini 31, I - 66100 Chieti, Italy
| | - Maria Chiara Cristiano
- Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy
| | - Donato Cosco
- IRC-FSH-Interregional Research Center for Food Safety & Health, University of Catanzaro "Magna Græcia", Building of BioSciences, V.le Europa, I- 88100 Germaneto, Catanzaro, CZ, Italy; Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy
| | - Francesco Castelli
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, I - 95125 Catania, Italy
| | - Maria Grazia Sarpietro
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, I - 95125 Catania, Italy
| | - Massimo Fresta
- IRC-FSH-Interregional Research Center for Food Safety & Health, University of Catanzaro "Magna Græcia", Building of BioSciences, V.le Europa, I- 88100 Germaneto, Catanzaro, CZ, Italy; Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy
| | - Christian Celia
- Department of Pharmacy, University of Chieti - Pescara "G. d'Annunzio", Via dei Vestini 31, I - 66100 Chieti, Italy; Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, TX 77030, USA.
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Hayashi M, Nishiyama M, Kazayama Y, Toyota T, Harada Y, Takiguchi K. Reversible Morphological Control of Tubulin-Encapsulating Giant Liposomes by Hydrostatic Pressure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3794-3802. [PMID: 27023063 DOI: 10.1021/acs.langmuir.6b00799] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Liposomes encapsulating cytoskeletons have drawn much recent attention to develop an artificial cell-like chemical-machinery; however, as far as we know, there has been no report showing isothermally reversible morphological changes of liposomes containing cytoskeletons because the sets of various regulatory factors, that is, their interacting proteins, are required to control the state of every reaction system of cytoskeletons. Here we focused on hydrostatic pressure to control the polymerization state of microtubules (MTs) within cell-sized giant liposomes (diameters ∼10 μm). MT is the cytoskeleton formed by the polymerization of tubulin, and cytoskeletal systems consisting of MTs are very dynamic and play many important roles in living cells, such as the morphogenesis of nerve cells and formation of the spindle apparatus during mitosis. Using real-time imaging with a high-pressure microscope, we examined the effects of hydrostatic pressure on the morphology of tubulin-encapsulating giant liposomes. At ambient pressure (0.1 MPa), many liposomes formed protrusions due to tubulin polymerization within them. When high pressure (60 MPa) was applied, the protrusions shrank within several tens of seconds. This process was repeatedly inducible (around three times), and after the pressure was released, the protrusions regenerated within several minutes. These deformation rates of the liposomes are close to the velocities of migrating or shape-changing living cells rather than the shortening and elongation rates of the single MTs, which have been previously measured. These results demonstrate that the elongation and shortening of protrusions of giant liposomes is repeatedly controllable by regulating the polymerization state of MTs within them by applying and releasing hydrostatic pressure.
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Affiliation(s)
- Masahito Hayashi
- Division of Biological Science, Graduate School of Science, Nagoya University , Nagoya 464-8602, Japan
| | | | | | | | | | - Kingo Takiguchi
- Division of Biological Science, Graduate School of Science, Nagoya University , Nagoya 464-8602, Japan
- Structural Biology Research Center, Nagoya University , Nagoya 464-8601, Japan
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