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Portell-Buj E, González-Criollo C, López-Gavín A, Fernández-Pittol M, Busquets MA, Estelrich J, Garrigó M, Rubio M, Tudó G, Gonzalez-Martin J. Activity of Antibiotics and Potential Antibiofilm Agents against Biofilm-Producing Mycobacterium avium-intracellulare Complex Causing Chronic Pulmonary Infections. Antibiotics (Basel) 2022; 11:antibiotics11050589. [PMID: 35625233 PMCID: PMC9137467 DOI: 10.3390/antibiotics11050589] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/23/2022] [Accepted: 04/26/2022] [Indexed: 02/04/2023] Open
Abstract
Nontuberculous mycobacteria (NTM) cause lung infections in patients with underlying pulmonary diseases (PD). The Mycobacteriumavium-intracellulare complex (MAC) is the most frequently involved NTM. The MAC-PD treatment is based on the administration of several antibiotics for long periods of time. Nonetheless, treatment outcomes remain very poor. Among the factors involved is the ability of MAC isolates to form biofilm. The aim of the study was to assess the in vitro activity of different antibiotics and potential antibiofilm agents (PAAs) against MAC biofilm. Four antibiotics and six PAAs, alone and/or in combination, were tested against planktonic forms of 11 MAC clinical isolates. Biofilm was produced after 4 weeks of incubation and analyzed with the crystal violet assay. The antibiotics and PAAs were tested by measuring the absorbance (minimum biofilm inhibition concentrations, MBICs) and by performing subcultures (minimum biofilm eradication concentrations, MBECs). The clarithromycin/amikacin and clarithromycin/ethambutol combinations were synergistic, decreasing the MBECs values compared to the individual antibiotics. The amikacin/moxifloxacin combination showed indifference. The MBIC values decreased significantly when PAAs were added to the antibiotic combinations. These results suggest that antibiotic combinations should be further studied to establish their antibiofilm activity. Moreover, PAAs could act against the biofilm matrix, facilitating the activity of antibiotics.
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Affiliation(s)
- Elena Portell-Buj
- Departament de Fonaments Clínics, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, c/Casanova 143, 08036 Barcelona, Spain; (E.P.-B.); (C.G.-C.); (A.L.-G.); (M.F.-P.); (G.T.)
- ISGlobal Barcelona, Institute for Global Health, c/Rosselló 132, 08036 Barcelona, Spain
- Servei de Microbiologia, CDB, Hospital Clínic de Barcelona, c/Villarroel 170, 08036 Barcelona, Spain
| | - Cecibel González-Criollo
- Departament de Fonaments Clínics, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, c/Casanova 143, 08036 Barcelona, Spain; (E.P.-B.); (C.G.-C.); (A.L.-G.); (M.F.-P.); (G.T.)
- Unidad de Investigación en Biomedicina, Zurita & Zurita Laboratorios, Quito 170104, Ecuador
| | - Alexandre López-Gavín
- Departament de Fonaments Clínics, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, c/Casanova 143, 08036 Barcelona, Spain; (E.P.-B.); (C.G.-C.); (A.L.-G.); (M.F.-P.); (G.T.)
- ISGlobal Barcelona, Institute for Global Health, c/Rosselló 132, 08036 Barcelona, Spain
- Servei de Microbiologia, CDB, Hospital Clínic de Barcelona, c/Villarroel 170, 08036 Barcelona, Spain
| | - Mariana Fernández-Pittol
- Departament de Fonaments Clínics, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, c/Casanova 143, 08036 Barcelona, Spain; (E.P.-B.); (C.G.-C.); (A.L.-G.); (M.F.-P.); (G.T.)
- ISGlobal Barcelona, Institute for Global Health, c/Rosselló 132, 08036 Barcelona, Spain
- Servei de Microbiologia, CDB, Hospital Clínic de Barcelona, c/Villarroel 170, 08036 Barcelona, Spain
| | - Maria Antònia Busquets
- Department de Farmàcia, Tecnologia Farmacèutica i Físicoquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona, Av. Joan XXIII, 27-31, 08028 Barcelona, Spain; (M.A.B.); (J.E.)
- Institut de Nanociència i Nanotecnologia, IN2UB, Facultat de Química, Av. Diagonal 645, 08028 Barcelona, Spain
| | - Joan Estelrich
- Department de Farmàcia, Tecnologia Farmacèutica i Físicoquímica, Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona, Av. Joan XXIII, 27-31, 08028 Barcelona, Spain; (M.A.B.); (J.E.)
- Institut de Nanociència i Nanotecnologia, IN2UB, Facultat de Química, Av. Diagonal 645, 08028 Barcelona, Spain
| | - Montserrat Garrigó
- Servei de Microbiologia, Fundació de Gestió de l’Hospital de la Santa Creu i Sant Pau, c/Sant Quintí 89, 08026 Barcelona, Spain;
- Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), c/Sant Quintí 77, 08041 Barcelona, Spain;
| | - Marc Rubio
- Institut d’Investigació Biomèdica Sant Pau (IIB Sant Pau), c/Sant Quintí 77, 08041 Barcelona, Spain;
| | - Griselda Tudó
- Departament de Fonaments Clínics, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, c/Casanova 143, 08036 Barcelona, Spain; (E.P.-B.); (C.G.-C.); (A.L.-G.); (M.F.-P.); (G.T.)
- ISGlobal Barcelona, Institute for Global Health, c/Rosselló 132, 08036 Barcelona, Spain
- Servei de Microbiologia, CDB, Hospital Clínic de Barcelona, c/Villarroel 170, 08036 Barcelona, Spain
| | - Julian Gonzalez-Martin
- Departament de Fonaments Clínics, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, c/Casanova 143, 08036 Barcelona, Spain; (E.P.-B.); (C.G.-C.); (A.L.-G.); (M.F.-P.); (G.T.)
- ISGlobal Barcelona, Institute for Global Health, c/Rosselló 132, 08036 Barcelona, Spain
- Servei de Microbiologia, CDB, Hospital Clínic de Barcelona, c/Villarroel 170, 08036 Barcelona, Spain
- CIBER of Infectiuos Diseases (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence:
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Estelrich J, Busquets MA. Prussian Blue: A Nanozyme with Versatile Catalytic Properties. Int J Mol Sci 2021; 22:ijms22115993. [PMID: 34206067 PMCID: PMC8198601 DOI: 10.3390/ijms22115993] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 05/28/2021] [Accepted: 05/28/2021] [Indexed: 12/17/2022] Open
Abstract
Nanozymes, nanomaterials with enzyme-like activities, are becoming powerful competitors and potential substitutes for natural enzymes because of their excellent performance. Nanozymes offer better structural stability over their respective natural enzymes. In consequence, nanozymes exhibit promising applications in different fields such as the biomedical sector (in vivo diagnostics/and therapeutics) and the environmental sector (detection and remediation of inorganic and organic pollutants). Prussian blue nanoparticles and their analogues are metal–organic frameworks (MOF) composed of alternating ferric and ferrous irons coordinated with cyanides. Such nanoparticles benefit from excellent biocompatibility and biosafety. Besides other important properties, such as a highly porous structure, Prussian blue nanoparticles show catalytic activities due to the iron atom that acts as metal sites for the catalysis. The different states of oxidation are responsible for the multicatalytic activities of such nanoparticles, namely peroxidase-like, catalase-like, and superoxide dismutase-like activities. Depending on the catalytic performance, these nanoparticles can generate or scavenge reactive oxygen species (ROS).
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Affiliation(s)
- Joan Estelrich
- Department of Pharmacy and Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain;
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Avda. Diagonal 645, 08028 Barcelona, Catalonia, Spain
- Correspondence:
| | - M. Antònia Busquets
- Department of Pharmacy and Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain;
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Avda. Diagonal 645, 08028 Barcelona, Catalonia, Spain
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3
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Abstract
Prussian blue (PB) and PB analogues (PBA) are coordination network materials that present important similarities with zeolites concretely with their ability of adsorbing cations. Depending on the conditions of preparation, which is cheap and easy, PB can be classified into soluble PB and insoluble PB. The zeolitic-like properties are mainly inherent to insoluble form. This form presents some defects in its cubic lattice resulting in an open structure. The vacancies make PB capable of taking up and trapping ions or molecules into the lattice. Important adsorption characteristics of PB are a high specific area (370 m2 g-1 determined according the BET theory), uniform pore diameter, and large pore width. PB has numerous applications in many scientific and technological fields. PB are assembled into nanoparticles that, due to their biosafety and biocompatibility, can be used for biomedical applications. PB and PBA have been shown to be excellent sorbents of radioactive cesium and radioactive and nonradioactive thallium. Other cations adsorbed by PB are K+, Na+, NH4+, and some divalent cations. PB can also capture gaseous molecules, hydrocarbons, and even luminescent molecules such as 2-aminoanthracene. As the main adsorptive application of PB is the selective removal of cations from the environment, it is important to easily separate the sorbent of the purified solution. To facilitate this, PB is encapsulated into a polymer or coats a support, sometimes magnetic particles. Finally, is remarkable to point out that PB can be recycled and the adsorbed material can be recovered.
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Affiliation(s)
- Joan Estelrich
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda., Joan XXIII, 27–31, 08028 Barcelona, Spain;
- Institute of Nanoscience and Nanotechnology, University of Barcelona, Avda., Diagonal 645, 08028 Barcelona, Spain
| | - Maria Antònia Busquets
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda., Joan XXIII, 27–31, 08028 Barcelona, Spain;
- Institute of Nanoscience and Nanotechnology, University of Barcelona, Avda., Diagonal 645, 08028 Barcelona, Spain
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Kowalczyk J, Grapsi E, Espargaró A, Caballero AB, Juárez-Jiménez J, Busquets MA, Gamez P, Sabate R, Estelrich J. Dual Effect of Prussian Blue Nanoparticles on Aβ40 Aggregation: β-Sheet Fibril Reduction and Copper Dyshomeostasis Regulation. Biomacromolecules 2021; 22:430-440. [PMID: 33416315 DOI: 10.1021/acs.biomac.0c01290] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Alzheimer's disease (AD), affecting almost 50 million individuals worldwide, is currently the first cause of dementia. Despite the tremendous research efforts in the last decade, only four supportive or palliative drugs, namely, acetylcholinesterase (AChE) inhibitors donepezil, galantamine, and rivastigmine and the glutamate NMDA receptor antagonist memantine, are currently available. New therapeutic strategies are becoming prominent, such as the direct inhibition of amyloid formation or the regulation of metal homeostasis. In the present report, the potential use of Prussian blue (PB), a drug that is in the World Health Organization Model List of Essential Medicines, in AD treatment is demonstrated. Both in vitro and in cellulo studies indeed suggest that PB nanoparticles (PBNPs) are capable of reducing the formation of typical amyloid-β fibers (detected by thioflavin T fluorescence) and restoring the usual amyloid fibrillation pathway via chelation/sequestration of copper, which is found in high concentrations in senile plaques.
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Affiliation(s)
- Joanna Kowalczyk
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain
| | - Ettore Grapsi
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain
| | - Alba Espargaró
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain
| | - Ana B Caballero
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain.,NanoBIC, Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain
| | - Jordi Juárez-Jiménez
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain
| | - Maria A Busquets
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain
| | - Patrick Gamez
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain.,NanoBIC, Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain.,Catalan Institution for Research and Advanced Studies, Passeig Lluís Companys 23, 08010 Barcelona, Catalonia, Spain
| | - Raimon Sabate
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain
| | - Joan Estelrich
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31 Barcelona, Catalonia, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Catalonia, Spain
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5
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Busquets MA, Estelrich J. Prussian blue nanoparticles: synthesis, surface modification, and biomedical applications. Drug Discov Today 2020; 25:1431-1443. [PMID: 32492486 DOI: 10.1016/j.drudis.2020.05.014] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/30/2020] [Accepted: 05/21/2020] [Indexed: 01/02/2023]
Abstract
Prussian blue nanoparticles (PBNPs) are a nanomaterial that presents unique properties and an excellent biocompatibility. They can be synthesized in mild conditions and can be derivatized with polymers and/or biomolecules. PBNPs are used in biomedicine as therapy and diagnostic agents. In biomedical imaging, PBNPs constitute contrast agents in photoacoustic and magnetic resonance imaging (MRI). They are a good adsorbent to be used as antidotes for poisoning with cesium and/or thallium ions. Moreover, the ability to convert energy into heat makes them useful photothermal agents (PAs) in photothermal therapy (PTT) or as nonantibiotic substances with antibacterial properties. Finally, PBNPs can be both reduced to Prussian white and oxidized to Prussian green. A large window of redox potential exists between reduction and oxidation, which result in the enzyme-like characteristics of these NPs.
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Affiliation(s)
- Maria Antònia Busquets
- Pharmacy and Pharmaceutical Technology and Physical Chemistry Department, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain; Institute of Nanoscience and Nanotechnology, IN2UB, Diagonal 645, 08028 Barcelona, Catalonia, Spain
| | - Joan Estelrich
- Pharmacy and Pharmaceutical Technology and Physical Chemistry Department, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain; Institute of Nanoscience and Nanotechnology, IN2UB, Diagonal 645, 08028 Barcelona, Catalonia, Spain.
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6
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Busquets MA, Novella-Xicoy A, Guzmán V, Estelrich J. Facile Synthesis of Novel Prussian Blue-Lipid Nanocomplexes. Molecules 2019; 24:E4137. [PMID: 31731679 PMCID: PMC6891449 DOI: 10.3390/molecules24224137] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/08/2019] [Accepted: 11/11/2019] [Indexed: 12/19/2022] Open
Abstract
Prussian blue (PB) is known for its multiple applications ranging from fine arts to therapeutics. More recently, PB nanoparticles have been pointed to as appealing photothermal agents (PA) when irradiated with wavelengths corresponding to the biological windows, namely regions located in the near infrared (NIR) zone. In addition, the combination of PB with other components such as phospholipids boosts their therapeutical potential by facilitating, for instance, the incorporation of drugs becoming suitable drug delivery systems. The novelty of the research relies on the synthesis procedure and characterization of hybrid lipid-PB nanoparticles with a high yield in a friendly environment suitable for photothermal therapy. This goal was achieved by first obtaining insoluble PB coated with oleylamine (OA) to facilitate its combination with lipids. The resulting lipid-PB complex showed a monomodal distribution of sizes with an overall size of around 100 nm and a polydispersity index of about 0.200. It highlights one critical step in the synthesis procedure that is the shaking time of the mixture of PB-OA nanoparticles with the lipid, which was found to be 48 h. This time assured homogeneous preparation without the need of further separation stages. Samples were stable for more than three months under several storage conditions.
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Affiliation(s)
- Maria Antònia Busquets
- Pharmacy and Pharmaceutical Technology and, Physical Chemistry Department, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain; (M.A.B.); (A.N.-X.)
- Institute of Nanoscience and Nanotechnology, INUB, Diagonal 645, 08028 Barcelona, Catalonia, Spain
| | - Ariadna Novella-Xicoy
- Pharmacy and Pharmaceutical Technology and, Physical Chemistry Department, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain; (M.A.B.); (A.N.-X.)
| | - Valeria Guzmán
- Department of Biotechnology, Polytechnic University of Sinaloa, Carretera Municipal Libre Mazatlán Higueras Km 3, 82199 Mazatlán, Sinaloa, Mexico;
| | - Joan Estelrich
- Pharmacy and Pharmaceutical Technology and, Physical Chemistry Department, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Catalonia, Spain; (M.A.B.); (A.N.-X.)
- Institute of Nanoscience and Nanotechnology, INUB, Diagonal 645, 08028 Barcelona, Catalonia, Spain
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7
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Caballero AB, Espargaró A, Pont C, Busquets MA, Estelrich J, Muñoz-Torrero D, Gamez P, Sabate R. Bacterial Inclusion Bodies for Anti-Amyloid Drug Discovery: Current and Future Screening Methods. Curr Protein Pept Sci 2019; 20:563-576. [PMID: 30924417 DOI: 10.2174/1389203720666190329120007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 10/16/2018] [Revised: 03/20/2019] [Accepted: 03/22/2019] [Indexed: 11/22/2022]
Abstract
Amyloid aggregation is linked to an increasing number of human disorders from nonneurological pathologies such as type-2 diabetes to neurodegenerative ones such as Alzheimer or Parkinson's diseases. Thirty-six human proteins have shown the capacity to aggregate into pathological amyloid structures. To date, it is widely accepted that amyloid folding/aggregation is a universal process present in eukaryotic and prokaryotic cells. In the last decade, several studies have unequivocally demonstrated that bacterial inclusion bodies - insoluble protein aggregates usually formed during heterologous protein overexpression in bacteria - are mainly composed of overexpressed proteins in amyloid conformation. This fact shows that amyloid-prone proteins display a similar aggregation propensity in humans and bacteria, opening the possibility to use bacteria as simple models to study amyloid aggregation process and the potential effect of both anti-amyloid drugs and pro-aggregative compounds. Under these considerations, several in vitro and in cellulo methods, which exploit the amyloid properties of bacterial inclusion bodies, have been proposed in the last few years. Since these new methods are fast, simple, inexpensive, highly reproducible, and tunable, they have aroused great interest as preliminary screening tools in the search for anti-amyloid (beta-blocker) drugs for conformational diseases. The aim of this mini-review is to compile recently developed methods aimed at tracking amyloid aggregation in bacteria, discussing their advantages and limitations, and the future potential applications of inclusion bodies in anti-amyloid drug discovery.
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Affiliation(s)
- Ana B Caballero
- Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, E-08028 Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, E-08028 Barcelona, Spain
| | - Alba Espargaró
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, E-08028 Barcelona, Spain.,Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, E-08028 Barcelona, Spain
| | - Caterina Pont
- Laboratory of Pharmaceutical Chemistry (CSIC Associated Unit), Faculty of Pharmacy and Food Sciences, University of Barcelona, E-08028 Barcelona, Spain.,Institute of Biomedicine (IBUB), University of Barcelona, E-08028 Barcelona, Spain
| | - Maria Antònia Busquets
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, E-08028 Barcelona, Spain.,Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, E-08028 Barcelona, Spain
| | - Joan Estelrich
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, E-08028 Barcelona, Spain.,Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, E-08028 Barcelona, Spain
| | - Diego Muñoz-Torrero
- Laboratory of Pharmaceutical Chemistry (CSIC Associated Unit), Faculty of Pharmacy and Food Sciences, University of Barcelona, E-08028 Barcelona, Spain.,Institute of Biomedicine (IBUB), University of Barcelona, E-08028 Barcelona, Spain
| | - Patrick Gamez
- Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, E-08028 Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, E-08028 Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | - Raimon Sabate
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, E-08028 Barcelona, Spain.,Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, E-08028 Barcelona, Spain
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8
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Abstract
Photothermal therapy is a kind of therapy based on increasing the temperature of tumoral cells above 42 °C. To this aim, cells must be illuminated with a laser, and the energy of the radiation is transformed in heat. Usually, the employed radiation belongs to the near-infrared radiation range. At this range, the absorption and scattering of the radiation by the body is minimal. Thus, tissues are almost transparent. To improve the efficacy and selectivity of the energy-to-heat transduction, a light-absorbing material, the photothermal agent, must be introduced into the tumor. At present, a vast array of compounds are available as photothermal agents. Among the substances used as photothermal agents, gold-based compounds are one of the most employed. However, the undefined toxicity of this metal hinders their clinical investigations in the long run. Magnetic nanoparticles are a good alternative for use as a photothermal agent in the treatment of tumors. Such nanoparticles, especially those formed by iron oxides, can be used in combination with other substances or used themselves as photothermal agents. The combination of magnetic nanoparticles with other photothermal agents adds more capabilities to the therapeutic system: the nanoparticles can be directed magnetically to the site of interest (the tumor) and their distribution in tumors and other organs can be imaged. When used alone, magnetic nanoparticles present, in theory, an important limitation: their molar absorption coefficient in the near infrared region is low. The controlled clustering of the nanoparticles can solve this drawback. In such conditions, the absorption of the indicated radiation is higher and the conversion of energy in heat is more efficient than in individual nanoparticles. On the other hand, it can be designed as a therapeutic system, in which the heat generated by magnetic nanoparticles after irradiation with infrared light can release a drug attached to the nanoparticles in a controlled manner. This form of targeted drug delivery seems to be a promising tool of chemo-phototherapy. Finally, the heating efficiency of iron oxide nanoparticles can be increased if the infrared radiation is combined with an alternating magnetic field.
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Affiliation(s)
- Joan Estelrich
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda., Joan XXIII, 27⁻31, 08028 Barcelona, Catalonia, Spain.
- Nstitut de Nanociència i Nanotecnologia, IN2UB, Facultat de Química, Diagonal 645, 08028 Barcelona, Catalonia, Spain.
| | - Maria Antònia Busquets
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda., Joan XXIII, 27⁻31, 08028 Barcelona, Catalonia, Spain.
- Nstitut de Nanociència i Nanotecnologia, IN2UB, Facultat de Química, Diagonal 645, 08028 Barcelona, Catalonia, Spain.
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9
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Estelrich J, Busquets MA, del Carmen Morán M. Effect of PEGylation on Ligand-Targeted Magnetoliposomes: A Missed Goal. ACS Omega 2017; 2:6544-6555. [PMID: 30023523 PMCID: PMC6044770 DOI: 10.1021/acsomega.7b00778] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 07/31/2017] [Indexed: 05/30/2023]
Abstract
We tested the targeting efficiency of magnetoliposomes (MLPs) labeled with tripeptide arginine-glycine-aspartic acid (RGD) on two types of cells: HeLa cells expressing RGD receptors and 3T3 cells lacking RGD receptors. The targeting ability of RGD-MLPs was compared to that of bare MLPs and MLPs stabilized with poly(ethylene glycol) (PEG). Cellular internalization of these liposomes was determined by flow cytometry and confocal microscopy, which showed that both types of cells took up more nontargeting MLPs than targeting RGD-MLPs or PEG-MLPs, with PEG-MLPs showing the lowest degree of internalization. The presence of specific receptors on HeLa cells did not facilitate the binding of RGD-MLPs, probably due to the presence of PEG chains on the liposomal surface. The polymer increases the circulation time of the liposomes in the organism but reduces their interactions with cells. Despite the localization of the RGD peptide on the tip of PEG in RGD-MLPs, the interaction between the liposome and cell was still limited. To avoid this drawback, targeting drug delivery systems can be prepared with two types of PEG: one of a short length to enable biocompatibility and the other of a longer chain to carry the ligand.
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Affiliation(s)
- Joan Estelrich
- Secció
de Fisicoquímica; Departament de Farmàcia,
Tecnologia Farmacèutica i Fisicoquímica; Facultat de
Farmàcia i Ciències de l’Alimentació, Secció de
Fisiologia; Departament de Bioquímica i Fisiologia; Facultat
de Farmàcia i Ciències de l’Alimentació, and Institut de Nanociència
i Nanotecnologia UB (IN2UB), Universitat
de Barcelona; Avda. Joan
XXIII, 27-31, 08028 Barcelona, Catalonia, Spain
| | - Maria Antònia Busquets
- Secció
de Fisicoquímica; Departament de Farmàcia,
Tecnologia Farmacèutica i Fisicoquímica; Facultat de
Farmàcia i Ciències de l’Alimentació, Secció de
Fisiologia; Departament de Bioquímica i Fisiologia; Facultat
de Farmàcia i Ciències de l’Alimentació, and Institut de Nanociència
i Nanotecnologia UB (IN2UB), Universitat
de Barcelona; Avda. Joan
XXIII, 27-31, 08028 Barcelona, Catalonia, Spain
| | - María del Carmen Morán
- Secció
de Fisicoquímica; Departament de Farmàcia,
Tecnologia Farmacèutica i Fisicoquímica; Facultat de
Farmàcia i Ciències de l’Alimentació, Secció de
Fisiologia; Departament de Bioquímica i Fisiologia; Facultat
de Farmàcia i Ciències de l’Alimentació, and Institut de Nanociència
i Nanotecnologia UB (IN2UB), Universitat
de Barcelona; Avda. Joan
XXIII, 27-31, 08028 Barcelona, Catalonia, Spain
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10
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García-Jimeno S, Estelrich J, Callejas-Fernández J, Roldán-Vargas S. Reversible and irreversible aggregation of magnetic liposomes. Nanoscale 2017; 9:15131-15143. [PMID: 28972615 DOI: 10.1039/c7nr05301k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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
Understanding stabilization and aggregation in magnetic nanoparticle systems is crucial to optimizing the functionality of these systems in real physiological applications. Here we address this problem for a specific, yet representative, system. We present an experimental and analytical study on the aggregation of superparamagnetic liposomes in suspension in the presence of a controllable external magnetic field. We study the aggregation kinetics and report an intermediate time power law evolution and a long time stationary value for the average aggregate diffusion coefficient, both depending on the magnetic field intensity. We then show that the long time aggregate structure is fractal with a fractal dimension that decreases upon increasing the magnetic field intensity. By scaling arguments we also establish an analytical relation between the aggregate fractal dimension and the power law exponent controlling the aggregation kinetics. This relation is indeed independent on the magnetic field intensity. Despite the superparamagnetic character of our particles, we further prove the existence of a population of surviving aggregates able to maintain their integrity after switching off the external magnetic field. Finally, we suggest a schematic interaction scenario to rationalize the observed coexistence between reversible and irreversible aggregation.
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Affiliation(s)
- Sonia García-Jimeno
- Secció de Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Avda. Joan XXIII 17-31, E-08028, Barcelona, Catalonia, Spain
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11
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Rodríguez-Burneo N, Busquets MA, Estelrich J. Magnetic Nanoemulsions: Comparison between Nanoemulsions Formed by Ultrasonication and by Spontaneous Emulsification. Nanomaterials (Basel) 2017; 7:nano7070190. [PMID: 28737673 PMCID: PMC5535256 DOI: 10.3390/nano7070190] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 01/05/2023]
Abstract
Nanoemulsions are particularly suitable as a platform in the development of delivery systems. The type of nanoemulsion with a higher stability will offer an advantage in the preparation of a delivery system for lipophilic drugs. Nanoemulsions can be fabricated by different processing methods, which are usually categorized as either high- or low-energy methods. In this study, a comparison between two methods of preparing magnetic oil-in-water (O/W) nanoemulsions is described. The nanoemulsions were formed by sonication (the high-energy method) or by spontaneous emulsification (the low-energy method). In both cases, the oil phase was olive oil, and a phospholipid and a pegylated phospholipid were used as emulsifiers. To favor the comparison, the amounts of the components were the same in both kinds of nanoemulsions. Moreover, nanoemulsions were loaded with hydrophobic superparamagnetic nanoparticles and indomethacin. In vitro, releases studies indicated a short drug burst period followed by a prolonged phase of dissolutive drug release. The Korsmeyer-Peppas model can fit the associated kinetics. The results showed that such nanoemulsions are suitable as a platform in the development of delivering systems for lipophilic drugs. The long-term stability was also examined at different temperatures, as well as the interaction with plasma proteins. Nanoemulsion obtained by the low-energy method showed a great stability at 4 °C and at ambient temperature. Its size and polydispersity did not change over more than two months. The spontaneous emulsification method therefore has great potential for forming nanoemulsion-based delivery systems.
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Affiliation(s)
- Nathalia Rodríguez-Burneo
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Maria Antònia Busquets
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
- Nanoscience and Nanotechnology Institute (IN2UB), Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Joan Estelrich
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
- Nanoscience and Nanotechnology Institute (IN2UB), Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
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12
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Espargaró A, Ginex T, Vadell MDM, Busquets MA, Estelrich J, Muñoz-Torrero D, Luque FJ, Sabate R. Combined in Vitro Cell-Based/in Silico Screening of Naturally Occurring Flavonoids and Phenolic Compounds as Potential Anti-Alzheimer Drugs. J Nat Prod 2017; 80:278-289. [PMID: 28128562 DOI: 10.1021/acs.jnatprod.6b00643] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Alzheimer's disease (AD) is the main cause of dementia in people over 65 years. One of the major culprits in AD is the self-aggregation of amyloid-β peptide (Aβ), which has stimulated the search for small molecules able to inhibit Aβ aggregation. In this context, we recently reported a simple, but effective in vitro cell-based assay to evaluate the potential antiaggregation activity of putative Aβ aggregation inhibitors. In this work this assay was used together with docking and molecular dynamics simulations to analyze the anti-Aβ aggregation activity of several naturally occurring flavonoids and phenolic compounds. The results showed that rosmarinic acid, melatonin, and o-vanillin displayed zero or low inhibitory capacity, curcumin was found to have an intermediate inhibitory potency, and apigenin and quercetin showed potent antiaggregation activity. Finally, the suitability of the combined in vitro cell-based/in silico approach to distinguish between active and inactive compounds was further assessed for an additional set of flavonols and dihydroflavonols.
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Affiliation(s)
- Alba Espargaró
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, School of Pharmacy, and Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona , E-08028, Barcelona, Spain
| | - Tiziana Ginex
- Department of Nutrition, Food Sciences, and Gastronomy, School of Pharmacy and Institute of Biomedicine, Campus Torribera, University of Barcelona , Prat de la Riba 171, E-08921, Santa Coloma de Gramenet, Spain
| | - Maria Del Mar Vadell
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, School of Pharmacy, and Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona , E-08028, Barcelona, Spain
| | - Maria A Busquets
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, School of Pharmacy, and Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona , E-08028, Barcelona, Spain
| | - Joan Estelrich
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, School of Pharmacy, and Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona , E-08028, Barcelona, Spain
| | - Diego Muñoz-Torrero
- Laboratory of Pharmaceutical Chemistry (CSIC Associated Unit), School of Pharmacy, and Institute of Biomedicine (IBUB), University of Barcelona , E-08028, Barcelona, Spain
| | - F Javier Luque
- Department of Nutrition, Food Sciences, and Gastronomy, School of Pharmacy and Institute of Biomedicine, Campus Torribera, University of Barcelona , Prat de la Riba 171, E-08921, Santa Coloma de Gramenet, Spain
| | - Raimon Sabate
- Department of Pharmacy and Pharmaceutical Technology and Physical-Chemistry, School of Pharmacy, and Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona , E-08028, Barcelona, Spain
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13
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Sangrà M, Estelrich J, Sabaté R, Espargaró A, Busquets MA. Evidence of Protein Adsorption in Pegylated Liposomes: Influence of Liposomal Decoration. Nanomaterials (Basel) 2017; 7:E37. [PMID: 28336870 PMCID: PMC5333022 DOI: 10.3390/nano7020037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 01/24/2017] [Accepted: 02/03/2017] [Indexed: 12/31/2022]
Abstract
In order to contribute to a better knowledge of the events involved in the formation of the protein corona when nanoparticles (NPs) come in contact with proteins, we report a study about the changes on the physicochemical properties of pristine, PEGylated and Cyclic Arginine-Glycine-Aspartate peptide (RGD)-functionalized large unilamelar liposomes (LUVs) or magnetoliposomes (MLs) upon incubation with Bovine Serum Albumin (BSA). The main phospholipid component of both LUVs and MLs was l-α-phosphatydylcholine (PC) or 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) with 20% of cholesterol. The most obvious indication of the interaction of BSA-nanosystems is given by changes in the hydrodynamic diameter of the particles but other evidence is needed to corroborate the process. Our findings indicate that size modification is a process that is accomplished in few hours and that is strongly dependent not only on the surface decoration but also of the lipid composition of both LUVs and MLs. Fluorescence quenching experiments as well as cryogenic transmission electron microscopy (Cryo-TEM) images assessed these changes and confirmed that although each system has to be studied in a particular way, we can establish three distinctive features that turn into more reactive systems: (a) compositions containing PC compared with their DMPC counterparts; (b) the presence of PEG and/or RGD compared to the pristine counterparts; and (c) the presence of SPIONs: MLs show higher interaction than LUVs of the same lipid composition. Consequently, PEGylation (that is supposed to make stealth NPs) actually fails in preventing complete protein binding.
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Affiliation(s)
- Marc Sangrà
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Joan Estelrich
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
- Nanoscience and Nanotechnology Institute (IN2UB), Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Raimon Sabaté
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
- Nanoscience and Nanotechnology Institute (IN2UB), Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Alba Espargaró
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
- Nanoscience and Nanotechnology Institute (IN2UB), Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Maria Antònia Busquets
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
- Nanoscience and Nanotechnology Institute (IN2UB), Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain.
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14
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Martínez-González R, Estelrich J, Busquets MA. Liposomes Loaded with Hydrophobic Iron Oxide Nanoparticles: Suitable T₂ Contrast Agents for MRI. Int J Mol Sci 2016; 17:ijms17081209. [PMID: 27472319 PMCID: PMC5000607 DOI: 10.3390/ijms17081209] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 07/19/2016] [Accepted: 07/20/2016] [Indexed: 11/16/2022] Open
Abstract
There has been a recent surge of interest in the use of superparamagnetic iron oxide nanoparticles (SPIONs) as contrast agents (CAs) for magnetic resonance imaging (MRI), due to their tunable properties and their low toxicity compared with other CAs such as gadolinium. SPIONs exert a strong influence on spin-spin T2 relaxation times by decreasing the MR signal in the regions to which they are delivered, consequently yielding darker images or negative contrast. Given the potential of these nanoparticles to enhance detection of alterations in soft tissues, we studied the MRI response of hydrophobic or hydrophilic SPIONs loaded into liposomes (magnetoliposomes) of different lipid composition obtained by sonication. These hybrid nanostructures were characterized by measuring several parameters such as size and polydispersity, and number of SPIONs encapsulated or embedded into the lipid systems. We then studied the influence of acyl chain length as well as its unsaturation, charge, and presence of cholesterol in the lipid bilayer at high field strength (7 T) to mimic the conditions used in preclinical assays. Our results showed a high variability depending on the nature of the magnetic particles. Focusing on the hydrophobic SPIONs, the cholesterol-containing samples showed a slight reduction in r2, while unsaturation of the lipid acyl chain and inclusion of a negatively charged lipid into the bilayer appeared to yield a marked increase in negative contrast, thus rendering these magnetoliposomes suitable candidates as CAs, especially as a liver CA.
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Affiliation(s)
- Raquel Martínez-González
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, IN²UB, Faculty of Pharmacy, Avda Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Joan Estelrich
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, IN²UB, Faculty of Pharmacy, Avda Joan XXIII, 27-31, 08028 Barcelona, Spain.
| | - Maria Antònia Busquets
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, IN²UB, Faculty of Pharmacy, Avda Joan XXIII, 27-31, 08028 Barcelona, Spain.
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15
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Espargaró A, Busquets MA, Estelrich J, Sabate R. Key Points Concerning Amyloid Infectivity and Prion-Like Neuronal Invasion. Front Mol Neurosci 2016; 9:29. [PMID: 27147962 PMCID: PMC4840800 DOI: 10.3389/fnmol.2016.00029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 11/30/2015] [Accepted: 04/06/2016] [Indexed: 11/18/2022] Open
Abstract
Amyloid aggregation has been related to an increasing number of human illnesses, from Alzheimer’s and Parkinson’s diseases (AD/PD) to Creutzfeldt-Jakob disease. Commonly, only prions have been considered as infectious agents with a high capacity of propagation. However, recent publications have shown that many amyloid proteins, including amyloid β-peptide, α-synuclein (α-syn) and tau protein, also propagate in a “prion-like” manner. Meanwhile, no link between propagation of pathological proteins and neurotoxicity has been demonstrated. The extremely low infectivity under natural conditions of most non-prion amyloids is far below the capacity to spread exhibited by prions. Nonetheless, it is important to elucidate the key factors that cause non-prion amyloids to become infectious agents. In recent years, important advances in our understanding of the amyloid processes of amyloid-like proteins and unrelated prions (i.e., yeast and fungal prions) have yielded essential information that can shed light on the prion phenomenon in mammals and humans. As shown in this review, recent evidence suggests that there are key factors that could dramatically modulate the prion capacity of proteins in the amyloid conformation. The concentration of nuclei, the presence of oligomers, and the toxicity, resistance and localization of these aggregates could all be key factors affecting their spread. In short, those factors that favor the high concentration of extracellular nuclei or oligomers, characterized by small size, with a low toxicity could dramatically increase prion propensity; whereas low concentrations of highly toxic intracellular amyloids, with a large size, would effectively prevent infectivity.
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Affiliation(s)
- Alba Espargaró
- Faculty of Pharmacy, Laboratory of Conformational Diseases, Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology, University of Barcelona Barcelona, Spain
| | - Maria Antònia Busquets
- Faculty of Pharmacy, Laboratory of Conformational Diseases, Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology, University of Barcelona Barcelona, Spain
| | - Joan Estelrich
- Faculty of Pharmacy, Laboratory of Conformational Diseases, Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology, University of Barcelona Barcelona, Spain
| | - Raimon Sabate
- Faculty of Pharmacy, Laboratory of Conformational Diseases, Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology, University of Barcelona Barcelona, Spain
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16
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Busquets MA, Espargaró A, Sabaté R, Estelrich J. Magnetic Nanoparticles Cross the Blood-Brain Barrier: When Physics Rises to a Challenge. Nanomaterials (Basel) 2015; 5:2231-2248. [PMID: 28347118 PMCID: PMC5304810 DOI: 10.3390/nano5042231] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 11/25/2015] [Accepted: 12/08/2015] [Indexed: 12/21/2022]
Abstract
The blood-brain barrier is a physical and physiological barrier that protects the brain from toxic substances within the bloodstream and helps maintain brain homeostasis. It also represents the main obstacle in the treatment of many diseases of the central nervous system. Among the different approaches employed to overcome this barrier, the use of nanoparticles as a tool to enhance delivery of therapeutic molecules to the brain is particularly promising. There is special interest in the use of magnetic nanoparticles, as their physical characteristics endow them with additional potentially useful properties. Following systemic administration, a magnetic field applied externally can mediate the capacity of magnetic nanoparticles to permeate the blood-brain barrier. Meanwhile, thermal energy released by magnetic nanoparticles under the influence of radiofrequency radiation can modulate blood-brain barrier integrity, increasing its permeability. In this review, we present the strategies that use magnetic nanoparticles, specifically iron oxide nanoparticles, to enhance drug delivery to the brain.
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Affiliation(s)
- Maria Antònia Busquets
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona and Institute of Nanoscience and Nanotechnology (IN2UB), Avda. Joan XXIII, 08028 Barcelona, Spain.
| | - Alba Espargaró
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona and Institute of Nanoscience and Nanotechnology (IN2UB), Avda. Joan XXIII, 08028 Barcelona, Spain.
| | - Raimon Sabaté
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona and Institute of Nanoscience and Nanotechnology (IN2UB), Avda. Joan XXIII, 08028 Barcelona, Spain.
| | - Joan Estelrich
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona and Institute of Nanoscience and Nanotechnology (IN2UB), Avda. Joan XXIII, 08028 Barcelona, Spain.
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17
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Espargaró A, Busquets MA, Estelrich J, Sabate R. Amyloids in solid-state nuclear magnetic resonance: potential causes of the usually low resolution. Int J Nanomedicine 2015; 10:6975-83. [PMID: 26635473 PMCID: PMC4646584 DOI: 10.2147/ijn.s89385] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Amyloids are non-crystalline and insoluble, which imply that the classical structural biology tools, ie, X-ray crystallography and solution nuclear magnetic resonance (NMR), are not suitable for their analysis. In the last years, solid-state NMR (ssNMR) has emerged as an alternative tool to decrypt the structural signatures of amyloid fibrils, providing major contributions to our understanding of molecular structures of amyloids such as β-amyloid peptide associated with Alzheimer’s disease or fungal prions, among others. Despite this, the wide majority of amyloid fibrils display low resolution by ssNMR. Usually, this low resolution has been attributed to a high disorder or polymorphism of the fibrils, suggesting the existence of diverse elementary β-sheet structures. Here, we propose that a single β-sheet structure could be responsible for the broadening of the line widths in the ssNMR spectra. Although the fibrils and fibers consist of a single elementary structure, the angle of twist of each individual fibril in the mature fiber depends on the number of individual fibrils as well as the fibril arrangement in the final mature fiber. Thus, a wide range of angles of twist could be observed in the same amyloid sample. These twist variations involve changes in amino acid alignments that could be enough to limit the ssNMR resolution.
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Affiliation(s)
- Alba Espargaró
- Department of Physical Chemistry, School of Pharmacy, Institute of Nanoscience and Nanotechnology (IN UB), University of Barcelona, Barcelona, Spain
| | - Maria Antònia Busquets
- Department of Physical Chemistry, School of Pharmacy, Institute of Nanoscience and Nanotechnology (IN UB), University of Barcelona, Barcelona, Spain
| | - Joan Estelrich
- Department of Physical Chemistry, School of Pharmacy, Institute of Nanoscience and Nanotechnology (IN UB), University of Barcelona, Barcelona, Spain
| | - Raimon Sabate
- Department of Physical Chemistry, School of Pharmacy, Institute of Nanoscience and Nanotechnology (IN UB), University of Barcelona, Barcelona, Spain
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18
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Espargaró A, Busquets MA, Estelrich J, Sabate R. Predicting the aggregation propensity of prion sequences. Virus Res 2015; 207:127-35. [PMID: 25747492 DOI: 10.1016/j.virusres.2015.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 06/27/2014] [Revised: 02/19/2015] [Accepted: 03/02/2015] [Indexed: 11/19/2022]
Abstract
The presence of prions can result in debilitating and neurodegenerative diseases in mammals and protein-based genetic elements in fungi. Prions are defined as a subclass of amyloids in which the self-aggregation process becomes self-perpetuating and infectious. Like all amyloids, prions polymerize into fibres with a common core formed of β-sheet structures oriented perpendicular to the fibril axes which form a structure known as a cross-β structure. The intermolecular β-sheet propensity, a characteristic of the amyloid pattern, as well as other key parameters of amyloid fibril formation can be predicted. Mathematical algorithms have been proposed to predict both amyloid and prion propensities. However, it has been shown that the presence of amyloid-prone regions in a polypeptide sequence could be insufficient for amyloid formation. It has also often been stated that the formation of amyloid fibrils does not imply that these are prions. Despite these limitations, in silico prediction of amyloid and prion propensities should help detect potential new prion sequences in mammals. In addition, the determination of amyloid-prone regions in prion sequences could be very useful in understanding the effect of sporadic mutations and polymorphisms as well as in the search for therapeutic targets.
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Affiliation(s)
- Alba Espargaró
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Avda. Joan XXIII 27-31, E-08028 Barcelona, Spain; Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN(2)UB), Spain
| | - Maria Antònia Busquets
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Avda. Joan XXIII 27-31, E-08028 Barcelona, Spain; Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN(2)UB), Spain
| | - Joan Estelrich
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Avda. Joan XXIII 27-31, E-08028 Barcelona, Spain; Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN(2)UB), Spain
| | - Raimon Sabate
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Avda. Joan XXIII 27-31, E-08028 Barcelona, Spain; Institute of Nanoscience and Nanotechnology of the University of Barcelona (IN(2)UB), Spain.
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19
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Abstract
Magnetic resonance imaging (MRI) has become one of the most widely used and powerful tools for noninvasive clinical diagnosis owing to its high degree of soft tissue contrast, spatial resolution, and depth of penetration. MRI signal intensity is related to the relaxation times (T1, spin–lattice relaxation and T2, spin–spin relaxation) of in vivo water protons. To increase contrast, various inorganic nanoparticles and complexes (the so-called contrast agents) are administered prior to the scanning. Shortening T1 and T2 increases the corresponding relaxation rates, 1/T1 and 1/T2, producing hyperintense and hypointense signals respectively in shorter times. Moreover, the signal-to-noise ratio can be improved with the acquisition of a large number of measurements. The contrast agents used are generally based on either iron oxide nanoparticles or ferrites, providing negative contrast in T2-weighted images; or complexes of lanthanide metals (mostly containing gadolinium ions), providing positive contrast in T1-weighted images. Recently, lanthanide complexes have been immobilized in nanostructured materials in order to develop a new class of contrast agents with functions including blood-pool and organ (or tumor) targeting. Meanwhile, to overcome the limitations of individual imaging modalities, multimodal imaging techniques have been developed. An important challenge is to design all-in-one contrast agents that can be detected by multimodal techniques. Magnetoliposomes are efficient multimodal contrast agents. They can simultaneously bear both kinds of contrast and can, furthermore, incorporate targeting ligands and chains of polyethylene glycol to enhance the accumulation of nanoparticles at the site of interest and the bioavailability, respectively. Here, we review the most important characteristics of the nanoparticles or complexes used as MRI contrast agents.
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Affiliation(s)
- Joan Estelrich
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Barcelona, Catalonia, Spain ; Institut de Nanociència I Nanotecnologia (IN UB), Barcelona, Catalonia, Spain
| | - María Jesús Sánchez-Martín
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Maria Antònia Busquets
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Barcelona, Catalonia, Spain ; Institut de Nanociència I Nanotecnologia (IN UB), Barcelona, Catalonia, Spain
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20
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Castelló J, Gallardo M, Busquets MA, Estelrich J. Chitosan (or alginate)-coated iron oxide nanoparticles: A comparative study. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.12.031] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Tapia MJ, Monteserín M, Burrows HD, Almeida JAS, Pais AACC, Pina J, Seixas de Melo JS, Jarmelo S, Estelrich J. From molecular modelling to photophysics of neutral oligo- and polyfluorenes incorporated into phospholipid bilayers. Soft Matter 2015; 11:303-317. [PMID: 25411076 DOI: 10.1039/c4sm02145b] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The combination of various experimental techniques with theoretical simulations has allowed elucidation of the mode of incorporation of fluorene based derivatives into phospholipid bilayers. Molecular dynamics (MD) simulations on a fully hydrated 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine (DMPC) bilayer, with benzene (B), biphenyl (BP), fluorene (F) and tri-(9,9-di-n-octylfluorenyl-2,7-diyl), TF, have provided insights into the topography of these molecules when they are present in the phospholipid bilayer, and suggest marked differences between the behavior of the small molecules and the oligomer. Further information on the interaction of neutral fluorenes within the phospholipid bilayer was obtained by an infrared (IR) spectroscopic study of films of DMPC and of the phospholipid with PFO deuterated specifically on its alkyl chains (DMPC-PFO-d34). This was complemented by measurements of the effect of F, TF and two neutral polymers: polyfluorene poly(9,9-di-n-octylfluorenyl-2,7-diyl), PFO, and poly(9,9-di-n-dodecylfluorenyl-2,7-diyl), PFD, on the phospholipid phase transition temperature using differential scanning calorimetry (DSC). Changes in liposome size upon addition of F and PFO were followed by dynamic light scattering. In addition, the spectroscopic properties of F, TF, PFO and PFD solubilised in DMPC liposomes (absorption, steady-state and time-resolved fluorescence) were compared with those of the same probes in typical organic solvents (chloroform, cyclohexane and ethanol). Combining the insight from MD simulations with the results at the molecular level from the various experimental techniques suggests that while the small molecules have a tendency to be located in the phospholipid head group region, the polymers are incorporated within the lipid bilayers, with the backbone predominantly orthogonal to the phospholipid alkyl chains and with interdigitation of them and the PFO alkyl chains.
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Affiliation(s)
- M J Tapia
- Departamento de Química, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
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Busquets MA, Sabaté R, Estelrich J. Potential applications of magnetic particles to detect and treat Alzheimer's disease. Nanoscale Res Lett 2014; 9:538. [PMID: 25288921 PMCID: PMC4185209 DOI: 10.1186/1556-276x-9-538] [Citation(s) in RCA: 27] [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] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 09/20/2014] [Indexed: 05/10/2023]
Abstract
Nanotechnology is an exciting and promising scientific discipline. At the nanoscale, a material displays novel physical properties that offer many new and beneficial products and applications. In particular, magnetic nanoparticles - a core/shell nanoparticle - present considerable diagnostic and therapeutic potentials, and superparamagnetic iron oxide nanoparticles (SPIONs) are considered promising theranostic tools. Alzheimer's disease (AD) is a neurodegenerative disorder that predominantly affects people over 65 years of age. The disease is characterized by the presence of extracellular plaques in the brain which are formed by interwoven fibrils composed of variants of the β-amyloid peptide. Medication can temporarily retard worsening of symptoms, but only in the first stages of the disease; early detection is thus of crucial importance. This minireview covers the progress made in research on the use of magnetic nanoparticles for ex vivo and/or in vivo detection and diagnosis of AD by means of magnetic resonance imaging (MRI), or to label peptides and fibrils. Of particular importance is the use of these nanoparticles to detect AD biomarkers in biological fluids. A description is given of the bio-barcode amplification assay using functionalized magnetic particles, as well as the use of such nanoparticles as a system for inhibiting or delaying the assembly of peptide monomers into oligomers and fibrils. Lastly, a brief overview is given of possible future lines of research in this.
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Affiliation(s)
- Maria Antònia Busquets
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Catalonia, Spain
- Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, C/ Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain
| | - Raimon Sabaté
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Catalonia, Spain
- Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, C/ Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain
| | - Joan Estelrich
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Catalonia, Spain
- Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, C/ Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain
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Barbosa-Barros L, García-Jimeno S, Estelrich J. Formation and characterization of biobased magnetic nanoparticles double coated with dextran and chitosan by layer-by-layer deposition. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.03.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Estelrich J, Quesada-Pérez M, Forcada J, Callejas-Fernández J. CHAPTER 1. Introductory Aspects of Soft Nanoparticles. Soft Nanoparticles for Biomedical Applications 2014. [DOI: 10.1039/9781782625216-00001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Tapia MJ, Monteserín M, Burrows HD, Seixas de Melo JS, Estelrich J. Effect of the Phospholipid Chain Length and Head Group on Beta-Phase Formation of Poly(9,9-dioctylfluorene) Enclosed in Liposomes. Photochem Photobiol 2013; 89:1471-8. [DOI: 10.1111/php.12143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 07/15/2013] [Indexed: 11/29/2022]
Affiliation(s)
- María J. Tapia
- Departamento de Química; Universidad de Burgos; Burgos Spain
| | | | - Hugh D. Burrows
- Department of Chemistry; University of Coimbra; Coimbra Portugal
| | | | - Joan Estelrich
- Departament de Fisicoquímica; Facultat de Farmàcia; Universitat de Barcelona Avda; Barcelona Catalonia Spain
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García-Jimeno S, Escribano E, Queralt J, Estelrich J. External magnetic field-induced selective biodistribution of magnetoliposomes in mice. Nanoscale Res Lett 2012; 7:452. [PMID: 22883385 PMCID: PMC3479069 DOI: 10.1186/1556-276x-7-452] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Accepted: 07/27/2012] [Indexed: 05/25/2023]
Abstract
This study looked at the effect of an external magnet on the biodistribution of magnetoliposomes intravenously administrated in mice (8 mg iron/kg) with and without induced acute inflammation. Our results showed that due to enhanced vascular permeability, magnetoliposomes accumulated at the site of inflammation in the absence of an external magnetic field, but the amount of iron present increased under the effect of a magnet located at the inflammation zone. This increase was dependent on the time (20 or 60 min) of exposure of the external magnetic field. It was also observed that the presence of the magnet was associated with lower amounts of iron in the liver, spleen, and plasma than was found in mice in which a magnet had not been applied. The results of this study confirm that it is possible to target drugs encapsulated in magnetic particles by means of an external magnet.
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Affiliation(s)
- Sonia García-Jimeno
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII, Barcelona, Catalonia, 08028, Spain
| | - Elvira Escribano
- Departament de Farmàcia i Tecnologia Farmacèutica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII, Barcelona, Catalonia, 08028, Spain
- Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona (IN2UB), Barcelona, Catalonia, 08028, Spain
| | - Josep Queralt
- Departament de Fisiologia, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII, Barcelona, Catalonia, 08028, Spain
- Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona (IN2UB), Barcelona, Catalonia, 08028, Spain
| | - Joan Estelrich
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII, Barcelona, Catalonia, 08028, Spain
- Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona (IN2UB), Barcelona, Catalonia, 08028, Spain
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Hernández MR, Urbán P, Casals E, Estelrich J, Escolar G, Galán AM. Liposomes bearing fibrinogen could potentially interfere with platelet interaction and procoagulant activity. Int J Nanomedicine 2012; 7:2339-47. [PMID: 22654514 PMCID: PMC3363953 DOI: 10.2147/ijn.s28542] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background The contribution of fibrinogen (FBN) to hemostasis acting on platelet aggregation and clot formation is well established. It has been suggested that FBN-coated liposomes could be useful in restoring hemostasis. In the present study, we evaluated the modifications induced by multilamellar raw liposomes (MLV) or fibrinogen-coated liposomes (MLV-FBN) on hemostatic parameters. Materials and methods Different experimental settings using whole blood or thrombocy-topenic blood were used. Thromboelastometry, aggregation studies, platelet function analyzer (PFA-100®) tests and studies under flow conditions were applied to detect the effect of MLV-FBN on hemostatic parameters. Results The presence of MLV-FBN in whole blood modified its viscoelastic properties, prolonging clot formation time (CFT) (226.5 ± 26.1 mm versus 124.1 ± 9.4 mm; P < 0.01) but reducing clot firmness (45.4 ± 1.8 mm versus 35.5 ± 2.3 mm; P < 0.05). Under thrombocy-topenic conditions, FIBTEM analysis revealed that MLV-FBN shortened clotting time (CT) compared to MLV (153.3 ± 2.8 s versus 128.0 ± 4.6 s; P < 0.05). Addition of either liposome decreased fibrin formation on the subendothelium (MLV 8.1% ± 4.7% and MLV-FBN 0.8% ± 0.5% versus control 36.4% ± 6.7%; P < 0.01), whereas only MLV-FBN significantly reduced fibrin deposition in thrombocytopenic blood (14.4% ± 6.3% versus control 34.5% ± 5.2%; P < 0.05). MLV-FBN inhibited aggregation induced by arachidonic acid (52.1% ± 8.1% versus 88.0% ± 2.1% in control; P < 0.01) and ristocetin (40.3% ± 8.8% versus 94.3% ± 1.1%; P < 0.005), but it did not modify closure times in PFA-100® studies. In perfusion experiments using whole blood, MLV and MLV-FBN decreased the covered surface (13.25% ± 2.4% and 9.85% ± 2.41%, respectively, versus control 22.0% ± 2.0%; P < 0.01) and the percentage of large aggregates (8.4% ± 2.3% and 3.3% ± 1.01%, respectively, versus control 14.6% ± 1.8%; P < 0.01). Conclusion Our results reveal that, in addition to the main contribution of fibrinogen to hemostasis, MLV-FBN inhibits platelet-mediated hemostasis and coagulation mechanisms.
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Affiliation(s)
- M Rosa Hernández
- Department of Hemotherapy and Hemostasis, Hospital Clinic, CDB, IDIBAPS, UB, Barcelona, Spain
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Peláez-Fernández M, Moncho-Jordá A, García-Jimeno S, Estelrich J, Callejas-Fernández J. Role of the electrostatic depletion attraction on the structure of charged liposome-polymer mixtures. Phys Rev E Stat Nonlin Soft Matter Phys 2012; 85:051405. [PMID: 23004759 DOI: 10.1103/physreve.85.051405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Revised: 12/14/2011] [Indexed: 06/01/2023]
Abstract
The effect of adding charged nonadsorbing polymers to electrostatically structured suspensions of charged liposomes has been experimentally studied by means of light scattering techniques. The static structure factor of the mixtures is analyzed using two polymers of different sizes. As the polymer concentration increases, the main peak of the structure factor decreases and shows an important shift to larger values of the scattering vector. Such displacement is the consequence of the electrostatic-enhanced depletion attraction induced by the polymers that counteracts the electrostatic repulsion. For the shorter polymer, the system remains stable for all studied polymer concentrations. However, for the long polymer chains, the effective attraction induced at the highest polymer density studied is strong enough to destabilize the mixture. In this case, the aggregation of the liposomes leads to clusters of nearly linear morphology. The PRISM theory is employed to calculate the effective pair potential between liposomes. The theoretical predictions are able to support the experimental observations, and provide an explanation of the interplay between the electrostatic repulsive interaction and the depletion attraction. In particular, they show that the depletion attraction is especially long ranged, and is dominated by electrostatic effects rather than entropic.
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Affiliation(s)
- M Peláez-Fernández
- Grupo de Física de Fluidos y Biocoloides, Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
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Barbosa-Barros L, Rodríguez G, Barba C, Cócera M, Rubio L, Estelrich J, López-Iglesias C, de la Maza A, López O. Bicelles: lipid nanostructured platforms with potential dermal applications. Small 2012; 8:807-818. [PMID: 22114051 DOI: 10.1002/smll.201101545] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 09/26/2011] [Indexed: 05/31/2023]
Abstract
Bicelles emerge as promising membrane models, and because of their attractive combination of lipid composition, small size and morphological versatility, they become new targets in skin research. Bicelles are able to modify skin biophysical parameters and modulate the skin's barrier function, acting to enhance drug penetration. Because of their nanostructured assemblies, bicelles have the ability to penetrate through the narrow intercellular spaces of the stratum corneum of the skin to reinforce its lipid lamellae. The bicelle structure also allows for the incorporation of different molecules that can be carried through the skin layers. All of these characteristics can be modulated by varying the lipid composition and experimental conditions. The remarkable versatility of bicelles is their most important characteristic, which makes their use possible in various fields. This system represents a platform for dermal applications. In this review, an overview of the main properties of bicelles and their effects on the skin are presented.
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Affiliation(s)
- Lucyanna Barbosa-Barros
- Dept. of Chemical Technology and Surfactants, Institut de Química Avançada de Catalunya-I.Q.A.C., Consejo Superior de Investigaciones Científicas-C.S.I.C., C/Jordi Girona 18-26, 08034 Barcelona, Spain.
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García-Jimeno S, Ortega-Palacios R, Cepeda-Rubio M, Vera A, Leija L, Estelrich J. IMPROVED THERMAL ABLATION EFFICACY USING MAGNETIC NANOPARTICLES: A STUDY IN TUMOR PHANTOMS. ACTA ACUST UNITED AC 2012. [DOI: 10.2528/pier12020108] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Urbán P, Estelrich J, Adeva A, Cortés A, Fernàndez-Busquets X. Study of the efficacy of antimalarial drugs delivered inside targeted immunoliposomal nanovectors. Nanoscale Res Lett 2011; 6:620. [PMID: 22151840 PMCID: PMC3285703 DOI: 10.1186/1556-276x-6-620] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 12/07/2011] [Indexed: 05/24/2023]
Abstract
Paul Ehrlich's dream of a 'magic bullet' that would specifically destroy invading microbes is now a major aspect of clinical medicine. However, a century later, the implementation of this medical holy grail continues being a challenge in three main fronts: identifying the right molecular or cellular targets for a particular disease, having a drug that is effective against it, and finding a strategy for the efficient delivery of sufficient amounts of the drug in an active state exclusively to the selected targets. In a previous work, we engineered an immunoliposomal nanovector for the targeted delivery of its contents exclusively to Plasmodium falciparum-infected red blood cells [pRBCs]. In preliminary assays, the antimalarial drug chloroquine showed improved efficacy when delivered inside immunoliposomes targeted with the pRBC-specific monoclonal antibody BM1234. Because difficulties in determining the exact concentration of the drug due to its low amounts prevented an accurate estimation of the nanovector performance, here, we have developed an HPLC-based method for the precise determination of the concentrations in the liposomal preparations of chloroquine and of a second antimalarial drug, fosmidomycin. The results obtained indicate that immunoliposome encapsulation of chloroquine and fosmidomycin improves by tenfold the efficacy of antimalarial drugs. The targeting antibody used binds preferentially to pRBCs containing late maturation stages of the parasite. In accordance with this observation, the best performing immunoliposomes are those added to Plasmodium cultures having a larger number of late form-containing pRBCs. An average of five antibody molecules per liposome significantly improves in cell cultures the performance of immunoliposomes over non-functionalized liposomes as drug delivery vessels. Increasing the number of antibodies on the liposome surface correspondingly increases performance, with a reduction of 50% parasitemia achieved with immunoliposomes encapsulating 4 nM chloroquine and bearing an estimated 250 BM1234 units. The nanovector prototype described here can be a valuable platform amenable to modification and improvement with the objective of designing a nanostructure adequate to enter the preclinical pipeline as a new antimalarial therapy.
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Affiliation(s)
- Patricia Urbán
- Nanobioengineering Group, Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona, E08028, Spain
- Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona (UB), Martí i Franquès 1, Barcelona, E08028, Spain
- Barcelona Centre for International Health Research (CRESIB), Hospital Clínic-Universitat de Barcelona, Rosselló 132, Barcelona, E08036, Spain
| | - Joan Estelrich
- Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona (UB), Martí i Franquès 1, Barcelona, E08028, Spain
- Departament de Fisicoquímica, Facultat de Farmàcia, University of Barcelona, Av. Joan XXIII, s/n, Barcelona, E08028, Spain
| | - Alberto Adeva
- Scientific and Technological Centres, University of Barcelona, Baldiri Reixac 10-12, Barcelona, E08028, Spain
| | - Alfred Cortés
- Barcelona Centre for International Health Research (CRESIB), Hospital Clínic-Universitat de Barcelona, Rosselló 132, Barcelona, E08036, Spain
- Institute for Research in Biomedicine, Barcelona Science Park, Baldiri Reixac 10-12, Barcelona, E08028, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, Barcelona, E08018, Spain
| | - Xavier Fernàndez-Busquets
- Nanobioengineering Group, Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona, E08028, Spain
- Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona (UB), Martí i Franquès 1, Barcelona, E08028, Spain
- Barcelona Centre for International Health Research (CRESIB), Hospital Clínic-Universitat de Barcelona, Rosselló 132, Barcelona, E08036, Spain
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Tapia MJ, Monteserín M, Burrows HD, Seixas de Melo JS, Pina J, Castro RAE, García S, Estelrich J. β-Phase Formation of Poly(9,9-dioctylfluorene) Induced by Liposome Phospholipid Bilayers. J Phys Chem B 2011; 115:5794-800. [DOI: 10.1021/jp2010666] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- María José Tapia
- Departamento de Química, Universidad de Burgos, Plaza Misael Bañuelos, Burgos 09001, Spain
| | - María Monteserín
- Departamento de Química, Universidad de Burgos, Plaza Misael Bañuelos, Burgos 09001, Spain
| | - Hugh D. Burrows
- Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal
| | | | - João Pina
- Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal
| | | | - Sonia García
- Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n 08028 Barcelona, Catalonia, Spain
| | - Joan Estelrich
- Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n 08028 Barcelona, Catalonia, Spain
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Flores-Morales P, Diema C, Vilaseca M, Estelrich J, Luque FJ, Gutiérrez-Oliva S, Toro-Labbé A, Silva E. Enhanced reactivity of Lys182 explains the limited efficacy of biogenic amines in preventing the inactivation of glucose-6-phosphate dehydrogenase by methylglyoxal. Bioorg Med Chem 2011; 19:1613-22. [DOI: 10.1016/j.bmc.2011.01.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 01/14/2011] [Accepted: 01/21/2011] [Indexed: 11/25/2022]
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Urbán P, Estelrich J, Cortés A, Fernàndez-Busquets X. A nanovector with complete discrimination for targeted delivery to Plasmodium falciparum-infected versus non-infected red blood cells in vitro. J Control Release 2011; 151:202-11. [PMID: 21223986 DOI: 10.1016/j.jconrel.2011.01.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 12/22/2010] [Accepted: 01/04/2011] [Indexed: 12/22/2022]
Abstract
Current administration methods of antimalarial drugs deliver the free compound in the blood stream, where it can be unspecifically taken up by all cells, and not only by Plasmodium-infected red blood cells (pRBCs). Nanosized carriers have been receiving special attention with the aim of minimizing the side effects of malaria therapy by increasing drug bioavailability and selectivity. Liposome encapsulation has been assayed for the delivery of compounds against murine malaria, but there is a lack of cellular studies on the performance of targeted liposomes in specific cell recognition and on the efficacy of cargo delivery, and very little data on liposome-driven antimalarial drug targeting to human-infecting parasites. We have used fluorescence microscopy to assess in vitro the efficiency of liposomal nanocarriers for the targeted delivery of their contents to pRBCs. 200-nm liposomes loaded with quantum dots were covalently functionalized with oriented, specific half-antibodies against P. falciparum late form-infected pRBCs. In less than 90min, liposomes dock to pRBC plasma membranes and release their cargo to the cell. 100.0% of late form-containing pRBCs and 0.0% of non-infected RBCs in P. falciparum cultures are recognized and permeated by the content of targeted immunoliposomes. Liposomes not functionalized with antibodies are also specifically directed to pRBCs, although with less affinity than immunoliposomes. In preliminary assays, the antimalarial drug chloroquine at a concentration of 2nM, ≥10 times below its IC(50) in solution, cleared 26.7±1.8% of pRBCs when delivered inside targeted immunoliposomes.
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Affiliation(s)
- Patricia Urbán
- Nanobioengineering Group, Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona, Spain
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Trujillo-Romero CJ, Garcia-Jimeno S, Vera A, Leija L, Estelrich J. USING NANOPARTICLES FOR ENHANCING THE FOCUSING HEATING EFFECT OF AN EXTERNAL WAVEGUIDE APPLICATOR FOR ONCOLOGY HYPERTHERMIA: EVALUATION IN MUSCLE AND TUMOR PHANTOMS. ACTA ACUST UNITED AC 2011. [DOI: 10.2528/pier11092911] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Roldán-Vargas S, de Vicente J, Barnadas-Rodríguez R, Quesada-Pérez M, Estelrich J, Callejas-Fernández J. Suspensions of repulsive colloidal particles near the glass transition: Time and frequency domain descriptions. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 82:021406. [PMID: 20866808 DOI: 10.1103/physreve.82.021406] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2009] [Revised: 03/19/2010] [Indexed: 05/29/2023]
Abstract
We study the relaxation of both spontaneous and shear-induced fluctuations in suspensions of charged-stabilized colloidal particles near the glass transition by dynamic light scattering and rheology. Both observations are here understood in terms of a common structural relaxation process under a hard-sphere mode-coupling formalism. For ergodic systems, we show that the descriptions of the relaxation dynamics in time and frequency domains are governed by a common set of dynamic parameters. It is further shown that the microscopic ergodicity break-up induces the emergence of the macroscopic glass elasticity.
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Sabín J, Prieto G, Estelrich J, Sarmiento F, Costas M. Insertion of semifluorinated diblocks on DMPC and DPPC liposomes. Influence on the gel and liquid states of the bilayer. J Colloid Interface Sci 2010; 348:388-92. [DOI: 10.1016/j.jcis.2010.04.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 04/22/2010] [Accepted: 04/23/2010] [Indexed: 10/19/2022]
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Rodríguez G, Soria G, Coll E, Rubio L, Barbosa-Barros L, López-Iglesias C, Planas AM, Estelrich J, de la Maza A, López O. Bicosomes: bicelles in dilute systems. Biophys J 2010; 99:480-8. [PMID: 20643066 PMCID: PMC2905073 DOI: 10.1016/j.bpj.2010.03.072] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 03/22/2010] [Accepted: 03/31/2010] [Indexed: 11/23/2022] Open
Abstract
Bicelles are discoidal phospholipid nanostructures at high lipid concentrations. Under dilute conditions, bicelles become larger and adopt a variety of morphologies. This work proposes a strategy to preserve the discoidal morphology of bicelles in environments with high water content. Bicelles were formed in concentrated conditions and subsequently encapsulated in liposomes. Later dilution of these new structures, called bicosomes, demonstrated that lipid vesicles were able to isolate and protect bicelles entrapped inside them from the medium. Characterization of systems before and after dilution by dynamic light-scattering spectroscopy and cryo-transmission electron microscopy showed that free bicelles changed in size and morphology, whereas encapsulated bicelles remained unaltered by the effect of dilution. Free and entrapped bicelles (containing the paramagnetic contrast agent gadodiamide) were injected into rat brain lateral ventricles. Coronal and sagittal visualization was performed by magnetic resonance imaging. Whereas rats injected with free bicelles did not survive the surgery, those injected with bicosomes did, and a hyperintensity effect due to gadodiamide was observed in the cerebrospinal fluid. These results indicate that bicosomes are a good means of preserving the morphology of bicelles under dilution conditions.
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Affiliation(s)
- Gelen Rodríguez
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Guadalupe Soria
- Departament d'Isquèmia Cerebral i Neurodegeneració, Institut d'Investigacions Biomèdiques de Barcelona, Institut d'Investigatigacions Biomèdiques Agust Pi i Sunyer, Barcelona, Spain
| | - Elisenda Coll
- Serveis Cientificotècnics, Facultad de Farmacia, Universidad de Barcelona, Barcelona, Spain
| | - Laia Rubio
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Lucyanna Barbosa-Barros
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Carmen López-Iglesias
- Serveis Cientificotècnics, Facultad de Farmacia, Universidad de Barcelona, Barcelona, Spain
| | - Anna M. Planas
- Departament d'Isquèmia Cerebral i Neurodegeneració, Institut d'Investigacions Biomèdiques de Barcelona, Institut d'Investigatigacions Biomèdiques Agust Pi i Sunyer, Barcelona, Spain
| | - Joan Estelrich
- Departamento de Fisicoquímica, Facultad de Farmacia, Universidad de Barcelona, Barcelona, Spain
| | - Alfons de la Maza
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Olga López
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avançada de Catalunya, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
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Rodríguez G, Rubio L, Cócera M, Estelrich J, Pons R, de la Maza A, López O. Application of bicellar systems on skin: diffusion and molecular organization effects. Langmuir 2010; 26:10578-10584. [PMID: 20380392 DOI: 10.1021/la100691m] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The effect of bicelles formed by dipalmitoylphosphatidylcholine (DPPC)/dihexanoylphosphatidylcholine (DHPC) on stratum corneum (SC) lipids was studied by attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy at different temperatures. Analysis of the lipid organization in terms of chain conformational order and lateral packing shows that the use of bicelles hampers the fluidification of SC lipids with temperature and leads to a lateral packing corresponding to a stable hexagonal phase. Grazing incidence small- and wide-angle X-ray scattering (GISAXS and GIWAXS) techniques confirm these results and give evidence of higher lamellar order after treatment with these bicelles. Additionally, the effects of DPPC/DHPC and dimyristoylphosphatidylcholine (DMPC)/DHPC bicelles at different SC depths were compared. The combination of ATR-FTIR spectroscopy and the tape-stripping method was very useful for this purpose.
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Affiliation(s)
- Gelen Rodríguez
- Departament de Tecnologia Química i de Tensioactius, Institut de Quimica Avançada de Catalunya, Consejo Superior de Investigaciones Científicas, C/Jordi Girona 18-26, 08034 Barcelona, Spain.
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Galera-Cortés E, Solier JDD, Estelrich J, Hidalgo-Alvarez R. Study on the correlation between lateral diffusion effect and effective charge in neutral liposomes. Langmuir 2010; 26:2665-2670. [PMID: 19886630 DOI: 10.1021/la902916y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An experimental investigation is described on the variables that affect the lateral diffusion coefficient (D(lat)) of dimyristoylphosphatidylcholine, a zwitterionic phospholipid, and the effective charge (Z(ef)) on liposomes. The lateral diffusion coefficient was obtained from the dielectric relaxation time of the zwitterionic phospholipids in the bilayer, and the effective charge on the external monolayer was estimated from microelectrophoretic mobility measurements by means of the Henry and Coulomb equations. The measurements were performed at different pH values and salt (KBr) concentrations as well as in two physical states of the phospholipid: the liquid-crystalline phase and gel phase. The Z(ef) and D(lat) values in the gel phase are always lower than those in the fluid phase. A very small change of pH (approximately 0.5 pH units) caused a pronounced variation of the effective charge and the lateral diffusion coefficient. Both variations are correlated, which demonstrates that the adsorption of the ions that determine the electrokinetic potential also controls the lateral diffusion of dipolar phospholipids in the bilayer and the effective charge on the external surface of the liposomes.
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Affiliation(s)
- Elisa Galera-Cortés
- Departamento de Física Aplicada, Universidad de Extremadura, 06071 Badajoz, Spain
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Rodríguez G, Barbosa-Barros L, Rubio L, Cócera M, Díez A, Estelrich J, Pons R, Caelles J, De la Maza A, López O. Conformational changes in stratum corneum lipids by effect of bicellar systems. Langmuir 2009; 25:10595-10603. [PMID: 19735132 DOI: 10.1021/la901410h] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy was applied to study the effects of the bicelles formed by dimyristoyl-glycero-phosphocholine (DMPC) and dihexanoyl-glycero-phosphocholine (DHPC) in porcine stratum corneum (SC) in vitro. A comparison of skin samples treated and untreated with bicelles at different temperatures was carried out. The analysis of variations after treatment in the position of the symmetric CH2 stretching, CH2 scissoring, and CH2 rocking vibrations reported important information about the effect of bicelles on the skin. Bicellar systems caused a phase transition from the gel or solid state to the liquid crystalline state in the lipid conformation of SC, reflecting the major order-disorder transition from hexagonally packed to disordered chains. Grazing incidence small and wide X-ray scattering (GISAXS and GIWAXS) techniques confirmed this effect of bicelles on the SC. These results are probably related to with the permeabilizing effect previously described for the DMPC/DHPC bicelles.
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Affiliation(s)
- Gelen Rodríguez
- Departament de Tecnologia Química i de Tensioactius, Institut de Química Avancada de Catalunya (IQAC), Consejo Superior de Investigaciones Cientificas (CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain.
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Roldán-Vargas S, Peláez-Fernández M, Barnadas-Rodríguez R, Quesada-Pérez M, Estelrich J, Callejas-Fernández J. Nondiffusive Brownian motion of deformable particles: breakdown of the "long-time tail". Phys Rev E Stat Nonlin Soft Matter Phys 2009; 80:021403. [PMID: 19792120 DOI: 10.1103/physreve.80.021403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 07/03/2009] [Indexed: 05/28/2023]
Abstract
We study the nondiffusive Brownian motion of both rigid and deformable mesoscopic particles by cross-correlated dynamic light scattering with microsecond temporal resolution. Whereas rigid particles show the classical long-time tail prediction, the transition to diffusive motion of deformable particles presents a striking behavior not explained by the existing hydrodynamic treatments. This observation can be interpreted in terms of a damped oscillatory deformational motion on time scales of the order of the Brownian time. Finally, we show that the nondiffusive Brownian motion depends on the specific flexibility of the particles.
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Affiliation(s)
- Sándalo Roldán-Vargas
- Departamento de Física Aplicada, Grupo de Física de Fluidos y Biocoloides, Universidad de Granada, E-18071 Granada, Spain.
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Barnadas-Rodríguez R, Estelrich J. Photophysical Changes of Pyranine Induced by Surfactants: Evidence of Premicellar Aggregates. J Phys Chem B 2009; 113:1972-82. [DOI: 10.1021/jp806808u] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ramon Barnadas-Rodríguez
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028-Barcelona, Catalonia, Spain
| | - Joan Estelrich
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028-Barcelona, Catalonia, Spain
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Roldán-Vargas S, Barnadas-Rodríguez R, Quesada-Pérez M, Estelrich J, Callejas-Fernández J. Surface fractals in liposome aggregation. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 79:011905. [PMID: 19257067 DOI: 10.1103/physreve.79.011905] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Indexed: 05/17/2023]
Abstract
In this work, the aggregation of charged liposomes induced by magnesium is investigated. Static and dynamic light scattering, Fourier-transform infrared spectroscopy, and cryotransmission electron microscopy are used as experimental techniques. In particular, multiple intracluster scattering is reduced to a negligible amount using a cross-correlation light scattering scheme. The analysis of the cluster structure, probed by means of static light scattering, reveals an evolution from surface fractals to mass fractals with increasing magnesium concentration. Cryotransmission electron microscopy micrographs of the aggregates are consistent with this interpretation. In addition, a comparative analysis of these results with those previously reported in the presence of calcium suggests that the different hydration energy between lipid vesicles when these divalent cations are present plays a fundamental role in the cluster morphology. This suggestion is also supported by infrared spectroscopy data. The kinetics of the aggregation processes is also analyzed through the time evolution of the mean diffusion coefficient of the aggregates.
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Affiliation(s)
- Sándalo Roldán-Vargas
- Grupo de Física de Fluidos y Biocoloides, Departamento de Física Aplicada, Universidad de Granada, E-18071 Granada, Spain
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Prados A, Bordonaba D, Sicras A, Estelrich J, Aza M, Bordonaba D, Calderón A, Corbacho MS, González F, Lallana MJ, López-Cabañas A, Magdalena J, Oliván B, Poblador B, Poncel A. Pharmacy cost outliers in primary care; multilevel approach based on ACG in the Spanish context. BMC Health Serv Res 2008. [PMCID: PMC3313304 DOI: 10.1186/1472-6963-8-s1-a18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Sabaté R, Estelrich J. Determination of the dimerization constant of pinacyanol: role of the thermochromic effect. Spectrochim Acta A Mol Biomol Spectrosc 2008; 70:471-476. [PMID: 17964850 DOI: 10.1016/j.saa.2007.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Revised: 09/07/2007] [Accepted: 09/13/2007] [Indexed: 05/25/2023]
Abstract
Pinacyanol (PIN), as other cyanine dyes, has demonstrated a unique ability to form associates such as dimers, and H- and J-aggregates. This association is strongly favoured in water, and even at low dye concentrations, dimers and superior order aggregates are present. As a consequence, the determination of the dimerization constant involves sometimes a significant error when these aggregates are neglected. As an increase in temperature shifts the equilibrium among the different species towards the lowest order aggregates, we have obtained the spectra of PIN at several temperatures. By extrapolating some spectral characteristics at high temperatures, a spectrum of the dimer without any contribution of other aggregates was obtained. From this spectrum and that of the monomer, the dimerization constant was calculated, as well as the Gibbs energy change associated to the reaction. The enthalpy and entropy changes of the dimerization were determined from the dependence of the dimerization constants on the temperature. From these results it can be inferred that the driving force of the dimerization is of enthalpic origin.
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Affiliation(s)
- Raimon Sabaté
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII, s/n, 08028-Barcelona, Catalonia, Spain.
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Roldán-Vargas S, Barnadas-Rodríguez R, Martín-Molina A, Quesada-Pérez M, Estelrich J, Callejas-Fernández J. Growth of lipid vesicle structures: from surface fractals to mass fractals. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 78:010902. [PMID: 18763912 DOI: 10.1103/physreve.78.010902] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2007] [Indexed: 05/26/2023]
Abstract
We study fractal vesicle aggregates whose morphology is conditioned by the interaction between the lipid vesicle membranes and calcium and magnesium ions. These morphologies are probed by means of static light scattering using a cross-correlation scheme that avoids the multiple intracluster scattering. In contrast to the branched structures induced by calcium, we report a singular surface- to mass-fractal transition controlled by the magnesium concentration. From infrared spectroscopy data we conclude that the specific dehydration of the lipid membranes due to these cations plays an essential role in short-range intervesicle interactions.
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Affiliation(s)
- Sándalo Roldán-Vargas
- Grupo de Física de Fluidos y Biocoloides, Departamento de Física Aplicada, Universidad de Granada, Granada, Spain
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Camps P, Formosa X, Galdeano C, Gómez T, Muñoz-Torrero D, Scarpellini M, Viayna E, Badia A, Clos MV, Camins A, Pallàs M, Bartolini M, Mancini F, Andrisano V, Estelrich J, Lizondo M, Bidon-Chanal A, Luque FJ. Novel Donepezil-Based Inhibitors of Acetyl- and Butyrylcholinesterase and Acetylcholinesterase-Induced β-Amyloid Aggregation. J Med Chem 2008; 51:3588-98. [DOI: 10.1021/jm8001313] [Citation(s) in RCA: 159] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pelayo Camps
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Xavier Formosa
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Carles Galdeano
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Tània Gómez
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Diego Muñoz-Torrero
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Michele Scarpellini
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Elisabet Viayna
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Albert Badia
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - M. Victòria Clos
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Antoni Camins
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Mercè Pallàs
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Manuela Bartolini
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Francesca Mancini
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Vincenza Andrisano
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Joan Estelrich
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Mònica Lizondo
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - Axel Bidon-Chanal
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
| | - F. Javier Luque
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Departament de Farmacologia, de Terapèutica i de Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain, Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Universitat de Barcelona, Av. Diagonal 643, E-08028, Barcelona, Spain, Department of
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Barbosa-Barros L, de la Maza A, Estelrich J, Linares AM, Feliz M, Walther P, Pons R, López O. Penetration and growth of DPPC/DHPC bicelles inside the stratum corneum of the skin. Langmuir 2008; 24:5700-5706. [PMID: 18471002 DOI: 10.1021/la703732h] [Citation(s) in RCA: 23] [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: 05/26/2023]
Abstract
The effect of dipalmitoyl phosphatidylcholine (DPPC)/dihexanoyl phosphatidylcholine (DHPC) bicelles on the microstructure of pig stratum corneum (SC) in vitro was evaluated. The physicochemical characterization of these nanoaggregates revealed small disks with diameters around 15 nm and a thickness of 5.4 nm. Upon dilution, the bicelles grow and transform into vesicles. Cryogenic scanning electron microscopy (cryo-SEM) images of the SC pieces treated with this system showed vesicles of about 200 nm and lamellar-like structures in the intercellular lipid areas. These vesicles probably resulted from the growth and molecular rearrangement of the DPPC/DHPC bicelles after penetrating the SC. The presence of lamellar-like structures is ascribed to the interaction of the lipids from bicelles with the SC lipids. The bicellar system used is suitable to penetrate the skin SC and to reinforce the intercellular lipid areas, constituting a promising tool for skin applications.
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Affiliation(s)
- L Barbosa-Barros
- Departamento de Tecnología de Tensioactivos, Instituto de Investigaciones Químicas y Ambientales de Barcelona, Consejo Superior de Investigaciones Científicas, Calle Jordi Girona 18-26, 08034 Barcelona, Spain
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Sabaté R, Barnadas-Rodríguez R, Callejas-Fernández J, Hidalgo-Alvarez R, Estelrich J. Preparation and characterization of extruded magnetoliposomes. Int J Pharm 2007; 347:156-62. [PMID: 17692483 DOI: 10.1016/j.ijpharm.2007.06.047] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Revised: 06/21/2007] [Accepted: 06/27/2007] [Indexed: 11/24/2022]
Abstract
Phospholipid vesicles encapsulating magnetic nanoparticles (here after called magnetoliposomes) have been prepared for targeting a drug to a specific organ using a magnetic force, as well as for local hyperthermia therapy. Magnetoliposomes are also an ideal platform for use as contrast agents. We describe the preparation and characterization of liposomes containing magnetite, a ferrimagnetic material. These liposomes were obtained by extrusion. To prevent the aggregation of particles, the magnetite was treated--prior to encapsulation--with a surfactant, resulting in a stable ferrofluid suspension. Once the ferrofluid had been obtained, it was used to hydrate the phospholipid layers. Magnetoliposomes had a diameter of around 200 nm, the same pore size as the membranes used for the extrusion. The encapsulation efficiency was dependent on the initial amount of ferrofluid present at the encapsulation stage, and in the worst case was 19%. This value corresponded to 82.06 mmol of magnetite per mole of phospholipid. Although we have used a determined membrane pore to obtain the magnetoliposomes, the method described here allows to prepare magnetoliposomes of different sizes as well as of different magnetite content.
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Affiliation(s)
- Raimon Sabaté
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII, s/n, 08028-Barcelona, Catalonia, Spain
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