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Li J, Tiberi R, Canals P, Vargas D, Castaño O, Molina M, Tomasello A, Ribo M. Double stent-retriever as the first-line approach in mechanical thrombectomy: a randomized in vitro evaluation. J Neurointerv Surg 2023; 15:1224-1228. [PMID: 36627194 DOI: 10.1136/jnis-2022-019887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/21/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND A repeated number of passes during mechanical thrombectomy leads to worse clinical outcomes in acute ischemic stroke. Initial experiences with the simultaneous double stent-retriever (double-SR) technique as the first-line treatment showed promising safety and efficacy results. OBJECTIVE To characterize the potential benefits of using the double-SR as first-line technique as compared with the traditional single-SR approach. METHODS Three types of clot analogs (soft, moderately stiff, and stiff) were used to create terminal internal carotid artery (T-ICA=44) and middle cerebral artery (MCA=88) occlusions in an in vitro neurovascular model. Sixty-six cases were randomized into each treatment arm: single-SR or double-SR, in combination with a 0.071" distal aspiration catheter. A total of 132 in vitro thrombectomies were performed. Primary endpoints were the rate of first-pass recanalization (%FPR) and procedural-related distal emboli. RESULTS FPR was achieved in 42% of the cases. Overall, double-SR achieved a significantly higher %FPR than single-SR (52% vs 33%, P=0.035). Both techniques showed similar %FPR in T-ICA occlusions (single vs double: 23% vs 27%, P=0.728). Double-SR significantly outperformed single-SR in MCA occlusions (63% vs 38%, P=0.019), most notably in saddle occlusions (64% vs 14%, P=0.011), although no significant differences were found in single-branch occlusions (64% vs 50%, P=0.275). Double-SR reduced the maximal size of the clot fragments migrating distally (Feret diameter=1.08±0.65 mm vs 2.05±1.14 mm, P=0.038). CONCLUSIONS This randomized in vitro evaluation demonstrates that the front-line double-SR technique is more effective than single-SR in achieving FPR when treating MCA bifurcation occlusions that present saddle thrombus.
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Affiliation(s)
- Jiahui Li
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Riccardo Tiberi
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Pere Canals
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Daniel Vargas
- Department of Interventional Neuroradiology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Oscar Castaño
- Electronics and Biomedical Engineering, University of Barcelona, Barcelona, Spain
- Biomaterials for Regenerative Therapies, Institute for Bioengineering in Catalonia, Barcelona, Spain
| | - Marc Molina
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Alejandro Tomasello
- Department of Interventional Neuroradiology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Marc Ribo
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Spain
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Jurado M, Zorzano A, Castaño O. Cooperativity and oscillations: Regulatory mechanisms of K-Ras nanoclusters. Comput Biol Med 2023; 166:107455. [PMID: 37742420 DOI: 10.1016/j.compbiomed.2023.107455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 08/07/2023] [Accepted: 09/04/2023] [Indexed: 09/26/2023]
Abstract
K-Ras nanoclusters (NCs) concentrate all required molecules belonging to the extracellular signal-regulated kinase (ERK) mitogen-activated protein kinase (MAPK) pathway in a small area where signaling events take place, increasing efficiency and specificity of signaling. Such nanostructures are characterized by controlled sizes and lifetimes distributions, but there is a poor understanding of the mechanisms involved in their dynamics of growth/decay. Here, a minimum computational model is presented to analyze the behavior of K-Ras NCs as cooperative dynamic structures that self-regulate their growth and decay according to their size. Indeed, the proposed model reveals that the growth and the local production of a K-Ras nanocluster depend positively on its actual size, whilst its lifetime is inversely proportional to the root of its size. The cooperative binding between the structural constituents of the NC (K-Ras proteins) induces oscillations in the size distributions of K-Ras NCs allowing them to range within controlled values, regulating the growth/decay dynamics of these NCs. Thereby, the size of a K-Ras NC is proposed as a key factor to regulate cell signaling, opening a range of possibilities to develop strategies for use in chronic diseases and cancer.
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Affiliation(s)
- Manuel Jurado
- Faculty of Pharmacy, University of Barcelona, Barcelona, Spain
| | - Antonio Zorzano
- Institute for Research in Biomedicine (IRB), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain; CIBER of Diabetes and Associated Metabolic Diseases, Barcelona, Spain; Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Barcelona, Spain.
| | - Oscar Castaño
- Electronics and Biomedical Engineering, Universitat de Barcelona (UB), Barcelona, Spain; Nanobioengineering and Biomaterials, Institute of Nanoscience and Nanotechnology of the University of Barcelona, Barcelona, Spain
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Bilgin C, Hutar J, Li J, Castaño O, Ribo M, Kallmes DF. Catheter design primer for neurointerventionalists. J Neurointerv Surg 2023; 15:1117-1121. [PMID: 36597952 DOI: 10.1136/jnis-2022-019567] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022]
Abstract
Neurovascular catheter technology has rapidly evolved over the past decade. While performance characteristics are well known to the practitioner, the design features of these new-generation catheters and their implications on performance metrics remain a mystery to most clinicians due to the limited number of available resources. This knowledge gap hampers informed device choices and also limits collaboration between clinicians and engineers. To aid fellow neurointerventionalists, in this primer we have summarized the basic concepts of catheter design and construction.
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Affiliation(s)
- Cem Bilgin
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Jiahui Li
- Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Oscar Castaño
- Electronics and Biomedical Engineering, University of Barcelona, Barcelona, Catalunya, Spain
- Biomaterials for Regenerative Therapies, Institute for Bioengineering in Catalonia, Barcelona, Catalunya, Spain
| | - Marc Ribo
- Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
- Stroke Unit, Hospital Vall d'Hebron, Barcelona, Spain
| | - David F Kallmes
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
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Ferre-Torres J, Noguera-Monteagudo A, Lopez-Canosa A, Romero-Arias JR, Barrio R, Castaño O, Hernandez-Machado A. Modelling of chemotactic sprouting endothelial cells through an extracellular matrix. Front Bioeng Biotechnol 2023; 11:1145550. [PMID: 37362221 PMCID: PMC10285466 DOI: 10.3389/fbioe.2023.1145550] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 05/26/2023] [Indexed: 06/28/2023] Open
Abstract
Sprouting angiogenesis is a core biological process critical to vascular development. Its accurate simulation, relevant to multiple facets of human health, is of broad, interdisciplinary appeal. This study presents an in-silico model replicating a microfluidic assay where endothelial cells sprout into a biomimetic extracellular matrix, specifically, a large-pore, low-concentration fibrin-based porous hydrogel, influenced by chemotactic factors. We introduce a novel approach by incorporating the extracellular matrix and chemotactic factor effects into a unified term using a single parameter, primarily focusing on modelling sprouting dynamics and morphology. This continuous model naturally describes chemotactic-induced sprouting with no need for additional rules. In addition, we extended our base model to account for matrix sensing and degradation, crucial aspects of angiogenesis. We validate our model via a hybrid in-silico experimental method, comparing the model predictions with experimental results derived from the microfluidic setup. Our results underscore the intricate relationship between the extracellular matrix structure and angiogenic sprouting, proposing a promising method for predicting the influence of the extracellular matrix on angiogenesis.
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Affiliation(s)
- Josep Ferre-Torres
- Department of Condensed Matter Physics, University of Barcelona (UB), Barcelona, Spain
| | | | - Adrian Lopez-Canosa
- Electronics and Biomedical Engineering, University of Barcelona (UB), Barcelona, Spain
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Spain
| | - J. Roberto Romero-Arias
- Institute for Research in Applied Mathematics and Systems, National Autonomous University of Mexico , Mexico City, Mexico
| | - Rafael Barrio
- Institute of Physics, National Autonomous University of Mexico, Mexico City, Mexico
| | - Oscar Castaño
- Electronics and Biomedical Engineering, University of Barcelona (UB), Barcelona, Spain
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona (UB), Barcelona, Spain
| | - Aurora Hernandez-Machado
- Department of Condensed Matter Physics, University of Barcelona (UB), Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona (UB), Barcelona, Spain
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Gholami S, Rezvani A, Vatanpour V, Khoshravesh SH, Llacuna JL, Engel E, Castaño O, Cortina JL. Chlorine resistance property improvement of polyamide reverse osmosis membranes through cross-linking degree increment. Sci Total Environ 2023; 889:164283. [PMID: 37209732 DOI: 10.1016/j.scitotenv.2023.164283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 05/14/2023] [Accepted: 05/15/2023] [Indexed: 05/22/2023]
Abstract
Highly permeable polyamide reverse osmosis (RO) membranes are desirable for reducing the energy burden and ensuring future water resources in arid and semiarid regions. One notable drawback of thin film composite (TFC) polyamide RO/NF membranes is the polyamide's sensitivity to degradation by free chlorine, the most used biocide in water purification trains. This investigation demonstrated a significant increase in the crosslinking-degree parameter by the m-phenylenediamine (MPD) chemical structure extending in the thin film nanocomposite (TFN) membrane without adding extra MPD monomers to enhance the chlorine resistance and performance. Membrane modification was carried out according to monomer ratio changes and Nanoparticle embedding into the PA layer approaches. A new class of TFN-RO membranes incorporating novel aromatic amine functionalized (AAF)-MWCNTs embedded into the polyamide (PA) layer was introduced. A purposeful strategy was carried out to use cyanuric chloride (2,4,6-trichloro-1,3,5-triazine) as an intermediate functional group in the AAF-MWCNTs. Thus, amidic nitrogen, connected to benzene rings and carbonyl groups, assembles a structure similar to the standard PA, consisting of MPD and trimesoyl chloride. The resulting AAF-MWCNTs were mixed in the aqueous phase during the interfacial polymerization to increase the susceptible positions to chlorine attack and improve the crosslinking degree in the PA network. The characterization and performance results of the membrane demonstrated an increase in ion selectivity and water flux, impressive stability of salt rejection after chlorine exposure, and improved antifouling performance. This purposeful modification resulted in overthrowing two tradeoffs; i) high crosslink density-water flux and ii) salt rejection-permeability. The modified membrane demonstrated ameliorative chlorine resistance relative to the pristine one, with twice the increase in crosslinking degree, more than four times the enhancement of the oxidation resistance, negligible reduction in the salt rejection (0.83 %), and only 5 L/m2.h flux loss following a rigorous static chlorine exposure of 500 ppm.h under acidic conditions. The excellent performance of new chlorine resistant TNF RO membranes fabricated via AAF-MWCNTs together with the facile membrane manufacturing process offered the possibility of postulating them in the desalination field, which could eventually help the current freshwater supply challenge.
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Affiliation(s)
- Sina Gholami
- Department of Applied Chemistry, Faculty of Science, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran; University of Barcelona, Faculty of Chemistry, Department of Chemical Engineering and Analytical Chemistry, Martí i Franquès Street 1, 6th Floor, 08028 Barcelona, Spain; OdirLab Co, Loreto, 44, 08029 Barcelona, Spain.
| | - Alireza Rezvani
- Department of Applied Chemistry, Faculty of Science, University of Sistan and Baluchestan, P.O. Box 98135-674, Zahedan, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911 Tehran, Iran; Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul 34469, Turkey
| | | | - Joan Llorens Llacuna
- University of Barcelona, Faculty of Chemistry, Department of Chemical Engineering and Analytical Chemistry, Martí i Franquès Street 1, 6th Floor, 08028 Barcelona, Spain
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Oscar Castaño
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Jose Luis Cortina
- Chemical Engineering Department and Barcelona Research Center for Multiscale Science and Engineering, UPC-BarcelonaTECH, C/ Eduard Maristany, 10-14, 08930 Barcelona, Spain; Water Technology Center, Ctra. Esplugues 75, 08940 Cornellà de Llobregat, Spain.
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Palma-Florez S, López-Canosa A, Moralez-Zavala F, Castaño O, Kogan MJ, Samitier J, Lagunas A, Mir M. BBB-on-a-chip with integrated micro-TEER for permeability evaluation of multi-functionalized gold nanorods against Alzheimer's disease. J Nanobiotechnology 2023; 21:115. [PMID: 36978078 PMCID: PMC10053726 DOI: 10.1186/s12951-023-01798-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/27/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND The lack of predictive models that mimic the blood-brain barrier (BBB) hinders the development of effective drugs for neurodegenerative diseases. Animal models behave differently from humans, are expensive and have ethical constraints. Organ-on-a-chip (OoC) platforms offer several advantages to resembling physiological and pathological conditions in a versatile, reproducible, and animal-free manner. In addition, OoC give us the possibility to incorporate sensors to determine cell culture features such as trans-endothelial electrical resistance (TEER). Here, we developed a BBB-on-a-chip (BBB-oC) platform with a TEER measurement system in close distance to the barrier used for the first time for the evaluation of the permeability performance of targeted gold nanorods for theranostics of Alzheimer's disease. GNR-PEG-Ang2/D1 is a therapeutic nanosystem previously developed by us consisting of gold nanorods (GNR) functionalized with polyethylene glycol (PEG), angiopep-2 peptide (Ang2) to overcome the BBB and the D1 peptide as beta amyloid fibrillation inhibitor, finally obtaining GNR-PEG-Ang2/D1 which showed to be useful for disaggregation of the amyloid in in vitro and in vivo models. In this work, we evaluated its cytotoxicity, permeability, and some indications of its impact on the brain endothelium by employing an animal-free device based on neurovascular human cells. RESULTS In this work, we fabricated a BBB-oC with human astrocytes, pericytes and endothelial cells and a TEER measuring system (TEER-BBB-oC) integrated at a micrometric distance of the endothelial barrier. The characterization displayed a neurovascular network and the expression of tight junctions in the endothelium. We produced GNR-PEG-Ang2/D1 and determined its non-cytotoxic range (0.05-0.4 nM) for plated cells included in the BBB-oC and confirmed its harmless effect at the highest concentration (0.4 nM) in the microfluidic device. The permeability assays revealed that GNR-PEG-Ang2/D1 cross the BBB and this entry is facilitated by Ang2 peptide. Parallel to the permeability analysis of GNR-PEG-Ang2/D1, an interesting behavior of the TJs expression was observed after its administration probably related to the ligands on the nanoparticle surface. CONCLUSIONS BBB-oC with a novel TEER integrated setup which allow a correct read-out and cell imaging monitoring was proven as a functional and throughput platform to evaluate the brain permeability performance of nanotherapeutics in a physiological environment with human cells, putting forward a viable alternative to animal experimentation.
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Affiliation(s)
- Sujey Palma-Florez
- Nanobioengineering group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028, Barcelona, Spain
| | - Adrián López-Canosa
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
- Biomaterials for Regenerative Therapies Group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028, Barcelona, Spain
| | - Francisco Moralez-Zavala
- Department of Pharmacology and Toxicology, Faculty of Chemistry and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, 8380494, Santiago, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Sergio Livingstone 1007, Santiago, Chile
| | - Oscar Castaño
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
- Biomaterials for Regenerative Therapies Group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028, Barcelona, Spain
| | - Marcelo J Kogan
- Department of Pharmacology and Toxicology, Faculty of Chemistry and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, 8380494, Santiago, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Sergio Livingstone 1007, Santiago, Chile
| | - Josep Samitier
- Nanobioengineering group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Barcelona, Spain
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
| | - Anna Lagunas
- Nanobioengineering group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028, Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Barcelona, Spain.
| | - Mònica Mir
- Nanobioengineering group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028, Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Barcelona, Spain.
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain.
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Li J, Tomasello A, Requena M, Canals P, Tiberi R, Galve I, Engel E, Kallmes DF, Castaño O, Ribo M. Trackability of distal access catheters: an in vitro quantitative evaluation of navigation strategies. J Neurointerv Surg 2022; 15:496-501. [PMID: 35450927 DOI: 10.1136/neurintsurg-2022-018889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 04/08/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND In mechanical thrombectomy (MT), distal access catheters (DACs) are tracked through the vascular anatomy to reach the occlusion site. The inability of DACs to reach the occlusion site has been reported as a predictor of unsuccessful recanalization. This study aims to provide insight into how to navigate devices through the vascular anatomy with minimal track forces, since higher forces may imply more risk of vascular injuries. METHODS We designed an experimental setup to monitor DAC track forces when navigating through an in vitro anatomical model. Experiments were recorded to study mechanical behaviors such as tension buildup against vessel walls, DAC buckling, and abrupt advancements. A multiple regression analysis was performed to predict track forces from the catheters' design specifications. RESULTS DACs were successfully delivered to the target M1 in 60 of 63 in vitro experiments (95.2%). Compared to navigation with unsupported DAC, the concomitant coaxial use of a microcatheter/microguidewire and microcatheter/stent retriever anchoring significantly reduced the track forces by about 63% and 77%, respectively (p<0.01). The presence of the braid pattern in the reinforcement significantly reduced the track forces regardless of the technique used (p<0.05). Combined coil and braid reinforcement configuration, as compared with coil alone, and a thinner distal wall were predictors of lower track force when navigating with unsupported DAC. CONCLUSIONS The use of microcatheter and stent retriever facilitate smooth navigation of DACs through the vascular tortuosity to reach the occlusion site, which in turn improves the reliability of tracking when positioning the DAC closer to the thrombus interface.
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Affiliation(s)
- Jiahui Li
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain.,Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Catalunya, Spain
| | - Alejandro Tomasello
- Neuroradiology, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain
| | - Manuel Requena
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain.,Neuroradiology, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain
| | - Pere Canals
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain.,Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Riccardo Tiberi
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain.,Materials Science and Engineering, Universitat Politecnica de Catalunya, Barcelona, Catalunya, Spain
| | - Iñaki Galve
- Department of Research and Development, Anaconda Biomed, Barcelona, Spain
| | - Elisabeth Engel
- Materials Science and Engineering, Universitat Politecnica de Catalunya, Barcelona, Catalunya, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER, Madrid, Comunidad de Madrid, Spain
| | - David F Kallmes
- Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Oscar Castaño
- Electronics and Biomedical Engineering, University of Barcelona, Barcelona, Catalunya, Spain.,Biomaterials for Regenerative Therapies, Institute for Bioengineering in Catalonia, Barcelona, Catalunya, Spain
| | - Marc Ribo
- Stroke Unit, Vall d'Hebron University Hospital, Barcelona, Catalunya, Spain .,Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Catalunya, Spain
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Li J, Castaño O, Ribo M. Response to letter: How much will a catheter tip expand in aspiration thrombectomy? J Neurointerv Surg 2021; 14:neurintsurg-2021-017919. [PMID: 34233946 DOI: 10.1136/neurintsurg-2021-017919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 06/26/2021] [Indexed: 11/04/2022]
Affiliation(s)
- Jiahui Li
- Stroke Research, Vall d'Hebron Research Institute, Barcelona, Barcelona, Spain.,Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Oscar Castaño
- Electronics and Biomedical Engineering, University of Barcelona, Barcelona, Catalunya, Spain.,Biomaterials for Regenerative Therapies, Institute for Bioengineering in Catalonia, Barcelona, Catalunya, Spain
| | - Marc Ribo
- Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain .,Stroke Unit, Neurology, Hospital Vall d'Hebron, Barcelona, Spain
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López-Canosa A, Perez-Amodio S, Yanac-Huertas E, Ordoño J, Rodriguez-Trujillo R, Samitier J, Castaño O, Engel E. A microphysiological system combining electrospun fibers and electrical stimulation for the maturation of highly anisotropic cardiac tissue. Biofabrication 2021; 13. [PMID: 33962409 DOI: 10.1088/1758-5090/abff12] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 05/07/2021] [Indexed: 12/28/2022]
Abstract
The creation of cardiac tissue models for preclinical testing is still a non-solved problem in drug discovery, due to the limitations related to thein vitroreplication of cardiac tissue complexity. Among these limitations, the difficulty of mimicking the functional properties of the myocardium due to the immaturity of the used cells hampers the obtention of reliable results that could be translated into human patients.In vivomodels are the current gold standard to test new treatments, although it is widely acknowledged that the used animals are unable to fully recapitulate human physiology, which often leads to failures during clinical trials. In the present work, we present a microfluidic platform that aims to provide a range of signaling cues to immature cardiac cells to drive them towards an adult phenotype. The device combines topographical electrospun nanofibers with electrical stimulation in a microfabricated system. We validated our platform using a co-culture of neonatal mouse cardiomyocytes and cardiac fibroblasts, showing that it allows us to control the degree of anisotropy of the cardiac tissue inside the microdevice in a cost-effective way. Moreover, a 3D computational model of the electrical field was created and validated to demonstrate that our platform is able to closely match the distribution obtained with the gold standard (planar electrode technology) using inexpensive rod-shaped biocompatible stainless-steel electrodes. The functionality of the electrical stimulation was shown to induce a higher expression of the tight junction protein Cx-43, as well as the upregulation of several key genes involved in conductive and structural cardiac properties. These results validate our platform as a powerful tool for the tissue engineering community due to its low cost, high imaging compatibility, versatility, and high-throughput configuration capabilities.
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Affiliation(s)
- Adrián López-Canosa
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, 08028 Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Electronics and Biomedical Engineering, Universitat de Barcelona (UB), 08028 Barcelona, Spain
| | - Soledad Perez-Amodio
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, 08028 Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,IMEM-BRT Group, Department Materials Science and Engineering, EEBE, Technical University of Catalonia (UPC), 08019 Barcelona, Spain
| | - Eduardo Yanac-Huertas
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, 08028 Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Jesús Ordoño
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, 08028 Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Romen Rodriguez-Trujillo
- Electronics and Biomedical Engineering, Universitat de Barcelona (UB), 08028 Barcelona, Spain.,Nanobioengineering group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri i Reixac 15-21, 08028 Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, Universitat de Barcelona (UB), 08028 Barcelona, Spain
| | - Josep Samitier
- CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Electronics and Biomedical Engineering, Universitat de Barcelona (UB), 08028 Barcelona, Spain.,Nanobioengineering group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri i Reixac 15-21, 08028 Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, Universitat de Barcelona (UB), 08028 Barcelona, Spain
| | - Oscar Castaño
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, 08028 Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Electronics and Biomedical Engineering, Universitat de Barcelona (UB), 08028 Barcelona, Spain.,Institute of Nanoscience and Nanotechnology, Universitat de Barcelona (UB), 08028 Barcelona, Spain
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, 08028 Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,IMEM-BRT Group, Department Materials Science and Engineering, EEBE, Technical University of Catalonia (UPC), 08019 Barcelona, Spain
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10
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Perez-Amodio S, Rubio N, Vila OF, Navarro-Requena C, Castaño O, Sanchez-Ferrero A, Marti-Munoz J, Alsina-Giber M, Blanco J, Engel E. Polymeric Composite Dressings Containing Calcium-Releasing Nanoparticles Accelerate Wound Healing in Diabetic Mice. Adv Wound Care (New Rochelle) 2021; 10:301-316. [PMID: 32602814 DOI: 10.1089/wound.2020.1206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Objective: Wound healing is a complex process that involves the interaction between different cell types and bioactive factors. Impaired wound healing is characterized by a loss in synchronization of these interactions, resulting in nonhealing chronic wounds. Chronic wounds are a socioeconomic burden, one of the most prominent clinical manifestations of diabetes, however, they lack satisfactory treatment options. The objective of this study was to develop polymeric composites that deliver ions having wound healing properties and evaluate its performance using a pressure ulcer model in diabetic mice. Approach: To develop a polymeric composite wound dressing containing ion-releasing nanoparticles for chronic wound healing. This composite was chemically and physically characterized and evaluated using a pressure ulcer wound model in diabetic (db/db) mice to explore their potential as novel wound dressing. Results: This dressing exhibits a controlled ion release and a good in vitro bioactivity. The polymeric composite dressing treatment stimulates angiogenesis, collagen synthesis, granulation tissue formation, and accelerates wound closure of ischemic wounds created in diabetic mice. In addition, the performance of the newly designed composite is remarkably better than a commercially available dressing frequently used for the treatment of low-exuding chronic wounds. Innovation: The developed nanoplatforms are cell- and growth factor free and control the host microenvironment resulting in enhanced wound healing. These nanoplatforms are available by cost-effective synthesis with a defined composition, offering an additional advantage in potential clinical application. Conclusion: Based on the obtained results, these polymeric composites offer an optimum approach for chronic wound healing without adding cells or external biological factors.
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Affiliation(s)
- Soledad Perez-Amodio
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Materials Science and Metallurgical Engineering, Polytechnic University of Catalonia (UPC), Barcelona, Spain
| | - Nuria Rubio
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Catalonian Institute for Advanced Chemistry (IQAC-CSIC), Barcelona, Spain
| | - Olaia F Vila
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Catalonian Institute for Advanced Chemistry (IQAC-CSIC), Barcelona, Spain
| | - Claudia Navarro-Requena
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Oscar Castaño
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Electronics and Biomedical Engineering, Universitat de Barcelona (UB), Barcelona, Spain
- Bioelectronics Unit and Nanobioengineering Lab., Institute for Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
| | - Aitor Sanchez-Ferrero
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Joan Marti-Munoz
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Mercè Alsina-Giber
- Department of Dermatology, Hospital Clinic de Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Jeronimo Blanco
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Catalonian Institute for Advanced Chemistry (IQAC-CSIC), Barcelona, Spain
| | - Elisabeth Engel
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine (CIBER-BBN), Madrid, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Materials Science and Metallurgical Engineering, Polytechnic University of Catalonia (UPC), Barcelona, Spain
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11
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Blanco-Fernandez B, Castaño O, Mateos-Timoneda MÁ, Engel E, Pérez-Amodio S. Nanotechnology Approaches in Chronic Wound Healing. Adv Wound Care (New Rochelle) 2021; 10:234-256. [PMID: 32320364 PMCID: PMC8035922 DOI: 10.1089/wound.2019.1094] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 03/04/2020] [Indexed: 12/28/2022] Open
Abstract
Significance: The incidence of chronic wounds is increasing due to our aging population and the augment of people afflicted with diabetes. With the extended knowledge on the biological mechanisms underlying these diseases, there is a novel influx of medical technologies into the conventional wound care market. Recent Advances: Several nanotechnologies have been developed demonstrating unique characteristics that address specific problems related to wound repair mechanisms. In this review, we focus on the most recently developed nanotechnology-based therapeutic agents and evaluate the efficacy of each treatment in in vivo diabetic models of chronic wound healing. Critical Issues: Despite the development of potential biomaterials and nanotechnology-based applications for wound healing, this scientific knowledge is not translated into an increase of commercially available wound healing products containing nanomaterials. Future Directions: Further studies are critical to provide insights into how scientific evidences from nanotechnology-based therapies can be applied in the clinical setting.
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Affiliation(s)
- Barbara Blanco-Fernandez
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Oscar Castaño
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Electronics and Biomedical Engineering, Universitat de Barcelona (UB), Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
- Bioelectronics Unit and Nanobioengineering Lab, Institute for Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
| | - Miguel Ángel Mateos-Timoneda
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
- Materials Science and Metallurgical Engineering, Polytechnic University of Catalonia (UPC), Barcelona, Spain
| | - Elisabeth Engel
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
- Materials Science and Metallurgical Engineering, Polytechnic University of Catalonia (UPC), Barcelona, Spain
| | - Soledad Pérez-Amodio
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
- Materials Science and Metallurgical Engineering, Polytechnic University of Catalonia (UPC), Barcelona, Spain
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12
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Li J, Castaño O, Tomasello A, de Dios Lascuevas M, Canals P, Engel E, Ribo M. Catheter tip distensibility substantially influences the aspiration force of thrombectomy devices. J Neurointerv Surg 2021; 14:neurintsurg-2021-017487. [PMID: 33858973 DOI: 10.1136/neurintsurg-2021-017487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/30/2021] [Accepted: 04/01/2021] [Indexed: 11/04/2022]
Abstract
BACKGROUND A direct aspiration first pass thrombectomy (ADAPT) is a fast-growing technique for which a broad catalog of catheters that provide a wide range of aspiration forces can be used. We aimed to characterize different catheters' aspiration performance on stiff clots in an in vitro vascular model. We hypothesized that labeled catheter inner diameter (labeled-ID) is not the only parameter that affects the aspiration force (asp-F) and that thrombus-catheter tip interaction and distensibility also play a major role. METHODS We designed an experimental setup consisting of a 3D-printed carotid artery immersed in a water deposit. We measured asp-F and distensibility of catheter tips when performing ADAPT on a stiff clot analog larger than catheter labeled-ID. Correlations between asp-F, catheter ID, and tip distensibility were statistically assessed. RESULTS Experimental asp-F and catheter labeled-ID were correlated (r=0.9601; P<0.01). The relative difference between experimental and theoretical asp-F (obtained by the product of the tip's section area by the vacuum pressure) correlated with tip's distensibility (r=0.9050; P<0.01), evidencing that ADAPT performance is highly influenced by catheter tip shape-adaptability to the clot and that the effective ID (eff-ID) may differ from the labeled-ID specified by manufacturers. Eff-ID showed the highest correlation with experimental asp-F (r=0.9944; P<0.01), confirming that eff-ID rather than labeled-ID should be considered to better estimate the device efficiency. CONCLUSIONS Catheter tip distensibility can induce a significant impact on ADAPT performance when retrieving a stiff clot larger than the device ID. Our findings might contribute to optimizing thrombectomy strategies and the design of novel aspiration catheters.
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Affiliation(s)
- Jiahui Li
- Stroke Unit, Neurology, Hospital Vall d'Hebron, Barcelona, Spain.,Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Oscar Castaño
- Electronics and Biomedical Engineering, University of Barcelona, Barcelona, Spain.,Biomaterials for Regenerative Therapies, Institute for Bioengineering in Catalonia, Barcelona, Spain
| | | | | | - Pere Canals
- Stroke Unit, Neurology, Hospital Vall d'Hebron, Barcelona, Spain.,Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Elisabeth Engel
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER, Madrid, Spain.,Materials Science and Engineering, Technical University of Catalonia, Barcelona, Spain
| | - Marc Ribo
- Stroke Unit, Neurology, Hospital Vall d'Hebron, Barcelona, Spain .,Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
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13
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Castaño O, López-Mengual A, Reginensi D, Matamoros-Angles A, Engel E, Del Rio JA. Chemotactic TEG3 Cells' Guiding Platforms Based on PLA Fibers Functionalized With the SDF-1α/CXCL12 Chemokine for Neural Regeneration Therapy. Front Bioeng Biotechnol 2021; 9:627805. [PMID: 33829009 PMCID: PMC8019790 DOI: 10.3389/fbioe.2021.627805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 11/10/2020] [Accepted: 03/01/2021] [Indexed: 12/14/2022] Open
Abstract
(Following spinal cord injury, olfactory ensheathing cell (OEC) transplantation is a promising therapeutic approach in promoting functional improvement. Some studies report that the migratory properties of OECs are compromised by inhibitory molecules and potentiated by chemical concentration differences. Here we compare the attachment, morphology, and directionality of an OEC-derived cell line, TEG3 cells, seeded on functionalized nanoscale meshes of Poly(l/dl-lactic acid; PLA) nanofibers. The size of the nanofibers has a strong effect on TEG3 cell adhesion and migration, with the PLA nanofibers having a 950 nm diameter being the ones that show the best results. TEG3 cells are capable of adopting a bipolar morphology on 950 nm fiber surfaces, as well as a highly dynamic behavior in migratory terms. Finally, we observe that functionalized nanofibers, with a chemical concentration increment of SDF-1α/CXCL12, strongly enhance the migratory characteristics of TEG3 cells over inhibitory substrates.
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Affiliation(s)
- Oscar Castaño
- Electronics and Biomedical Engineering, Universitat de Barcelona, Barcelona, Spain.,Biomaterials for Regenerative Therapies, Institute of Bioengineering of Catalonia, Parc Cientific de Barcelona, Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain.,Bioelectronics Unit and Nanobioeneering Laboratory, Institute for Nanoscience and Nanotechnology of the University of Barcelona, Barcelona, Spain
| | - Ana López-Mengual
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia, Parc Cientific de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Spain.,Institute of Neurosciences, University of Barcelona, Barcelona, Spain
| | - Diego Reginensi
- School of Medicine, Universidad de Panamá, Panama City, Panama.,Biomedical Engineering Program, Universidad Latina de Panamá, Panama City, Panama
| | - Andreu Matamoros-Angles
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia, Parc Cientific de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Spain.,Institute of Neurosciences, University of Barcelona, Barcelona, Spain
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies, Institute of Bioengineering of Catalonia, Parc Cientific de Barcelona, Barcelona, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain.,IMEM-BRT Group, Department of Materials Science, EEBE, Technical University of Catalonia (UPC), Barcelona, Spain
| | - José Antonio Del Rio
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia, Parc Cientific de Barcelona, Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Spain.,Institute of Neurosciences, University of Barcelona, Barcelona, Spain
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14
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Paoli R, Bulwan M, Castaño O, Engel E, Rodriguez-Cabello JC, Homs-Corbera A, Samitier J. Layer-by-layer modification effects on a nanopore's inner surface of polycarbonate track-etched membranes. RSC Adv 2020; 10:35930-35940. [PMID: 35517089 PMCID: PMC9056999 DOI: 10.1039/d0ra05322h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/17/2020] [Indexed: 11/21/2022] Open
Abstract
The control of the morphology, as well as the physical and chemical properties, of nanopores is a key issue for many applications. Reducing pore size is important in nanopore-based sensing applications as it helps to increase sensitivity. Changes of other physical properties such as surface net charge can also modify transport selectivity of the pores. We have studied how polyelectrolyte layer-by-layer (LBL) surface modification can be used to change the characteristics of nanoporous membranes. Studies were performed with a custom made three-dimensional multilayer microfluidic device able to fit membrane samples. The device allowed us to efficiently control LBL film deposition over blank low-cost commercially available polycarbonate track-etched (PCTE) membranes. We have demonstrated pore diameter reduction and deposition of the layers inside the pores through confocal and SEM images. Posterior impedance measurement studies served to evaluate experimentally the effect of the LBL deposition on the net inner nanopore surface charge and diameter. Measurements using direct current (DC) and alternative current (AC) voltages have demonstrated contrasted behaviors depending on the number and parity of deposited opposite charge layers. PCTE membranes are originally negatively charged and results evidenced higher impedance increases for paired charge LBL depositions. Impedance decreased when an unpaired positive layer was added. These results showed a different influence on the overall ion motility due to the effect of different surface charges. Results have been fit into a model that suggested a strong dependence of nanopores' impedance module to surface charge on conductive buffers, such as Phosphate Buffer Saline (PBS), even on relatively large nanopores. In AC significant differences between paired and unpaired charged LBL depositions tended to disappear as the total number of layers increased. The control of the morphology, as well as the physical and chemical properties, of nanopores is a key issue for many applications.![]()
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Affiliation(s)
- Roberto Paoli
- Nanobioengineering Group
- Institute for Bioengineering of Catalonia (IBEC)
- Barcelona Institute of Science and Technology (BIST)
- Barcelona 08028
- Spain
| | - Maria Bulwan
- Nanobioengineering Group
- Institute for Bioengineering of Catalonia (IBEC)
- Barcelona Institute of Science and Technology (BIST)
- Barcelona 08028
- Spain
| | - Oscar Castaño
- Department of Electronics and Biomedical Engineering
- University of Barcelona
- 08028 Barcelona
- Spain
- Biomaterials for Regenerative Therapies Group
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies Group
- Institute for Bioengineering of Catalonia (IBEC)
- Barcelona Institute of Science and Technology (BIST)
- Barcelona 08028
- Spain
| | - J. C. Rodriguez-Cabello
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
- 28029 Madrid
- Spain
- Bioforge Lab
- University of Valladolid
| | - Antoni Homs-Corbera
- Nanobioengineering Group
- Institute for Bioengineering of Catalonia (IBEC)
- Barcelona Institute of Science and Technology (BIST)
- Barcelona 08028
- Spain
| | - Josep Samitier
- Nanobioengineering Group
- Institute for Bioengineering of Catalonia (IBEC)
- Barcelona Institute of Science and Technology (BIST)
- Barcelona 08028
- Spain
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15
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Rey-Vinolas S, Castaño O, Ruiz-Macarrilla L, Llorens X, Mora JM, Engel E, Mateos-Timoneda MA. Development of a novel automatable fabrication method based on electrospinning co electrospraying for rotator cuff augmentation patches. PLoS One 2019; 14:e0224661. [PMID: 31725745 PMCID: PMC6855444 DOI: 10.1371/journal.pone.0224661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 10/18/2019] [Indexed: 01/02/2023] Open
Abstract
Rotator cuff tear is one of the most common shoulder diseases. Rotator cuff augmentation (RCA) is trying to solve the high retear failure percentage after the surgery procedures (20-90%). The ideal augmentation patch must provide a temporal mechanical support during the healing process. In this work, we proposed a simple method for the fabrication of synthetic RCA patches. This method combines the use of electrospraying to produce poly-L-lactic-co-ε-caprolactone (PLC) films in an organogel form and electrospinning to produce poly(lactic) acid (PLA) nanofibers. The device consists in a combination of layers, creating a multilayered construct, enabling the possibility of tuning its mechanical properties and thickness. Besides, both techniques are simple to escalate for industrial production. A complete characterization has been performed to optimize the involved number of layers and production time of PLC films and PLA nanofibers fabrication, obtaining a final optimal configuration for RCA devices. Structural, mechanical and suture properties were evaluated. Also, the possibility of surface functionalization to improve the bioactivity of the scaffold was studied, adding aligned electrospun PLA nanofibers on the surface of the device to mimic the natural tendon topography. Surface modification was characterized by culturing adult normal human dermal fibroblasts. Lack of toxicity was detected for material presented, and cell alignment shape orientation guided by aligned fibers, mimicking tendon structure, was obtained. Cell proliferation and protein production were also evaluated.
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Affiliation(s)
- Sergi Rey-Vinolas
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
| | - Oscar Castaño
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
- Serra Hunter Fellow, Electronics and Biomedical Engineering Department, University of Barcelona (UB), Barcelona, Spain
- Bioelectronics Unit and Nanobioengineering Lab., Institute for Nanoscience and Nanotechnology of the University of Barcelona (IN2UB), Barcelona, Spain
| | | | - Xavier Llorens
- Fundació Joan Costa Roma, Consorci Sanitari de Terrassa, Terrassa, Spain
- Servei de C.O.T., Hospital de Terrassa, Consorci Sanitari de Terrassa, Terrassa, Spain
| | - José M. Mora
- Fundació Joan Costa Roma, Consorci Sanitari de Terrassa, Terrassa, Spain
- Servei de C.O.T., Hospital de Terrassa, Consorci Sanitari de Terrassa, Terrassa, Spain
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
- Department of Materials Science and Metallurgical Engineering, EEBE campus, Technical University of Catalonia (UPC), Barcelona, Spain
| | - Miguel A. Mateos-Timoneda
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
- Department of Materials Science and Metallurgical Engineering, EEBE campus, Technical University of Catalonia (UPC), Barcelona, Spain
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16
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Marti-Muñoz J, Xuriguera E, Layton JW, Planell JA, Rankin SE, Engel E, Castaño O. Feasible and pure P 2O 5-CaO nanoglasses: An in-depth NMR study of synthesis for the modulation of the bioactive ion release. Acta Biomater 2019; 94:574-584. [PMID: 31141734 DOI: 10.1016/j.actbio.2019.05.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/19/2019] [Accepted: 05/24/2019] [Indexed: 12/12/2022]
Abstract
The use of bioactive glasses (e.g. silicates, phosphates, borates) has demonstrated to be an effective therapy for the restoration of bone fractures, wound healing and vascularization. Their partial dissolution towards the surrounding tissue has shown to trigger positive bioactive responses, without the necessity of using growth factors or cell therapy, which reduces money-costs, side effects and increases their translation to the clinics. However, bioactive glasses often need from stabilizers (e.g. SiO44-, Ti4+, Co2+, etc.) that are not highly abundant in the body and which metabolization is not fully understood. In this study, we were focused on synthesizing pure calcium phosphate glasses without the presence of such stabilizers. We combined a mixture of ethylphosphate and calcium 2-methoxyethoxide to synthesize nanoparticles with different compositions and degradability. Synthesis was followed by an in-depth nuclear magnetic resonance characterization, complemented with other techniques that helped us to correlate the chemical structure of the glasses with their physiochemical properties and reaction mechanism. After synthesis, the organically modified xerogel (i.e. calcium monoethylphosphate) was treated at 200 or 350 °C and its solubility was maintained and controlled due to the elimination of organics, increase of phosphate-calcium interactions and phosphate polycondensation. To the best of our knowledge, we are reporting the first sol-gel synthesis of binary (P2O5-CaO) calcium phosphate glass nanoparticles in terms of continuous polycondensated phosphate chains structure without the addition of extra ions. The main goal is to straightforward the synthesis, to get a safer metabolization and to modulate the bioactive ion release. Additionally, we shed light on the chemical structure, reaction mechanism and properties of calcium phosphate glasses with high calcium contents, which nowadays are poorly understood. STATEMENT OF SIGNIFICANCE: The use of bioactive inorganic materials (i.e. bioactive ceramics, glass-ceramics and glasses) for biomedical applications is attractive due to their good integration with the host tissue without the necessity of adding exogenous cells or growth factors. In particular, degradable calcium phosphate glasses are completely resorbable, avoiding the retention in the body of the highly stable silica network of silicate glasses, and inducing a more controllable degradability than bioactive ceramics. However, most calcium phosphate glasses include the presence of stabilizers (e.g. Ti4+, Na+, Co2+), which metabolization is not fully understood and complicates their synthesis. The development of binary calcium phosphate glasses with controlled degradability reduces these limitations, offering a simple and completely metabolizable material with higher transfer to the clinics.
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Affiliation(s)
- Joan Marti-Muñoz
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain; CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Elena Xuriguera
- Materials Science and Physical Chemistry Department, University of Barcelona (UB), 08028 Barcelona, Spain
| | - John W Layton
- Department of Chemistry, University of Kentucky (UKY), Lexington, KY 40506-0053, USA
| | - Josep A Planell
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain; CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Stephen E Rankin
- Chemical and Materials Engineering Department, University of Kentucky (UKY), Lexington, KY 40506-0053, USA
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain; CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain; Materials Science and Metallurgy Department (EEBE), Technical University of Catalonia (UPC), 08019 Barcelona, Spain.
| | - Oscar Castaño
- Serra Hunter Fellow, Electronics and Biomedical Engineering Department, University of Barcelona (UB), 08028 Barcelona, Spain; Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain; CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain; Institute of Nanoscience and Nanotechnology Department, University of Barcelona (UB), 08028 Barcelona, Spain.
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17
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Navarro-Requena C, Pérez-Amodio S, Castaño O, Engel E. Wound healing-promoting effects stimulated by extracellular calcium and calcium-releasing nanoparticles on dermal fibroblasts. Nanotechnology 2018; 29:395102. [PMID: 30039802 DOI: 10.1088/1361-6528/aad01f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Extracellular calcium has been proved to influence the healing process of injuries and could be used as a novel therapy for skin wound healing. However, a better understanding of its effect, together with a system to obtain a controlled release is needed. In this study, we examined whether the ionic dissolution of the calcium-phosphate-based ormoglass nanoparticles coded SG5 may produce a similar stimulating effect as extracellular calcium (from CaCl2) on rat dermal fibroblast in vitro. Cells were cultured in the presence of medium containing different calcium concentrations, normally ranging from 0.1 to 3.5 mM Ca2+. A concentration of 3.5 mM of CaCl2 increased metabolic activity, in vitro wound closure, matrix metalloproteinases (MMP) activity, collagen synthesis and cytokine expression, and reduced cell contraction capacity. Interestingly, the levels of migration and contraction capacity measured followed a dose-dependent behavior. In addition, media conditioned with SG5 stimulated the same activities as media conditioned with CaCl2, but undesired effects in chronic wound healing such as inflammatory factor expression and MMP activity were reduced compared to the equivalent CaCl2 concentration. In summary, calcium-releasing particles such as SG5 are potential biological-free biostimulators to be applied in dressings for chronic wound healing.
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Affiliation(s)
- Claudia Navarro-Requena
- Biomaterials for Regenerative Therapies. Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, E-08028 Barcelona Spain. Centro de Investigación Biomédica en Red en Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN) E-28029 Madrid, Spain. Materials Science and Metallurgical Engineering, EEBE, Universitat Politècnica de Catalunya (UPC), C/ Eduard Maristany 10-14, 08019 Barcelona, Spain
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Sachot N, Roguska A, Planell JA, Lewandowska M, Engel E, Castaño O. Fast-degrading PLA/ORMOGLASS fibrous composite scaffold leads to a calcium-rich angiogenic environment. Int J Nanomedicine 2017; 12:4901-4919. [PMID: 28744124 PMCID: PMC5513849 DOI: 10.2147/ijn.s135806] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The success of scaffold implantation in acellular tissue engineering approaches relies on the ability of the material to interact properly with the biological environment. This behavior mainly depends on the design of the graft surface and, more precisely, on its capacity to biodegrade in a well-defined manner (nature of ions released, surface-to-volume ratio, dissolution profile of this release, rate of material resorption, and preservation of mechanical properties). The assessment of the biological behavior of temporary templates is therefore very important in tissue engineering, especially for composites, which usually exhibit complicated degradation behavior. Here, blended polylactic acid (PLA) calcium phosphate ORMOGLASS (organically modified glass) nanofibrous mats have been incubated up to 4 weeks in physiological simulated conditions, and their morphological, topographical, and chemical changes have been investigated. The results showed that a significant loss of inorganic phase occurred at the beginning of the immersion and the ORMOGLASS maintained a stable composition afterward throughout the degradation period. As a whole, the nanostructured scaffolds underwent fast and heterogeneous degradation. This study reveals that an angiogenic calcium-rich environment can be achieved through fast-degrading ORMOGLASS/PLA blended fibers, which seems to be an excellent alternative for guided bone regeneration.
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Affiliation(s)
- Nadège Sachot
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), Barcelona
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Zaragoza, Spain
| | - Agata Roguska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Josep Anton Planell
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), Barcelona
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Zaragoza, Spain
| | - Malgorzata Lewandowska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Elisabeth Engel
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), Barcelona
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Zaragoza, Spain
- Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC)
| | - Oscar Castaño
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), Barcelona
- CIBER en Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Zaragoza, Spain
- Department of Materials Science and Physical Chemistry, Universitat de Barcelona (UB)
- Department of Engineerings: Electronics, Universitat de Barcelona, Barcelona, Spain
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Echalier C, Levato R, Mateos-Timoneda MA, Castaño O, Déjean S, Garric X, Pinese C, Noël D, Engel E, Martinez J, Mehdi A, Subra G. Modular bioink for 3D printing of biocompatible hydrogels: sol–gel polymerization of hybrid peptides and polymers. RSC Adv 2017. [DOI: 10.1039/c6ra28540f] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Inorganic polymerization as a cross-linking method for 3D printing of PEG–peptide hydrogels.
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Sachot N, Castaño O, Oliveira H, Martí-Muñoz J, Roguska A, Amedee J, Lewandowska M, Planell JA, Engel E. A novel hybrid nanofibrous strategy to target progenitor cells for cost-effective in situ angiogenesis. J Mater Chem B 2016; 4:6967-6978. [DOI: 10.1039/c6tb02162j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ti-doped calcium phosphate ormoglasses combined with biodegradable PLA promote an efficient and low-cost angiogenesis by the generation of high Ca2+concentrated interfaces that induce a high yield of tubulogenesis, with the gain in interface–cell interaction and instructivity.
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Affiliation(s)
- N. Sachot
- Biomaterials for Regenerative Therapies
- Institute for Bioengineering of Catalonia (IBEC)
- 08028 Barcelona
- Spain
- CIBER en Bioingeniería
| | - O. Castaño
- Biomaterials for Regenerative Therapies
- Institute for Bioengineering of Catalonia (IBEC)
- 08028 Barcelona
- Spain
- CIBER en Bioingeniería
| | - H. Oliveira
- Inserm U1026
- Tissue Bioengineering
- University of Bordeaux
- 33076 Bordeaux
- France
| | - J. Martí-Muñoz
- Biomaterials for Regenerative Therapies
- Institute for Bioengineering of Catalonia (IBEC)
- 08028 Barcelona
- Spain
- CIBER en Bioingeniería
| | - A. Roguska
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - J. Amedee
- Inserm U1026
- Tissue Bioengineering
- University of Bordeaux
- 33076 Bordeaux
- France
| | - M. Lewandowska
- Faculty of Materials Science and Engineering
- Warsaw University of Technology
- 02-507 Warsaw
- Poland
| | - J. A. Planell
- Biomaterials for Regenerative Therapies
- Institute for Bioengineering of Catalonia (IBEC)
- 08028 Barcelona
- Spain
- CIBER en Bioingeniería
| | - E. Engel
- Biomaterials for Regenerative Therapies
- Institute for Bioengineering of Catalonia (IBEC)
- 08028 Barcelona
- Spain
- CIBER en Bioingeniería
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Sachot N, Mateos-Timoneda MA, Planell JA, Velders AH, Lewandowska M, Engel E, Castaño O. Towards 4th generation biomaterials: a covalent hybrid polymer-ormoglass architecture. Nanoscale 2015; 7:15349-15361. [PMID: 26332471 DOI: 10.1039/c5nr04275e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Hybrid materials are being extensively investigated with the aim of mimicking the ECM microenvironment to develop effective solutions for bone tissue engineering. However, the common drawbacks of a hybrid material are the lack of interactions between the scaffold's constituents and the masking of its bioactive phase. Conventional hybrids often degrade in a non-homogeneous manner and the biological response is far from optimal. We have developed a novel material with strong interactions between constituents. The bioactive phase is directly exposed on its surface mimicking the structure of the ECM of bone. Here, polylactic acid electrospun fibers have been successfully and reproducibly coated with a bioactive organically modified glass (ormoglass, Si-Ca-P2 system) covalently. In comparison with the pure polymeric mats, the fibers obtained showed improved hydrophilicity and mechanical properties, bioactive ion release, exhibited a nanoroughness and enabled good cell adhesion and spreading after just one day of culture (rMSCs and rEPCs). The fibers were coated with different ormoglass compositions to tailor their surface properties (roughness, stiffness, and morphology) by modifying the experimental parameters. Knowing that cells modulate their behavior according to the exposed physical and chemical signals, the development of this instructive material is a valuable advance in the design of functional regenerative biomaterials.
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Affiliation(s)
- N Sachot
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), Barcelona, Spain.
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Castaño O, Sachot N, Xuriguera E, Engel E, Planell JA, Park JH, Jin GZ, Kim TH, Kim JH, Kim HW. Angiogenesis in bone regeneration: tailored calcium release in hybrid fibrous scaffolds. ACS Appl Mater Interfaces 2014; 6:7512-7522. [PMID: 24754868 DOI: 10.1021/am500885v] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In bone regeneration, silicon-based calcium phosphate glasses (Bioglasses) have been widely used since the 1970s. However, they dissolve very slowly because of their high amount of Si (SiO2 > 45%). Recently, our group has found that calcium ions released by the degradation of glasses in which the job of silicon is done by just 5% of TiO2 are effective angiogenic promoters, because of their stimulation of a cell-membrane calcium sensing receptor (CaSR). Based on this, other focused tests on angiogenesis have found that Bioglasses also have the potential to be angiogenic promoters even with high contents of silicon (80%); however, their slow degradation is still a problem, as the levels of silicon cannot be decreased any lower than 45%. In this work, we propose a new generation of hybrid organically modified glasses, ormoglasses, that enable the levels of silicon to be reduced, therefore speeding up the degradation process. Using electrospinning as a faithful way to mimic the extracellular matrix (ECM), we successfully produced hybrid fibrous mats with three different contents of Si (40, 52, and 70%), and thus three different calcium ion release rates, using an ormoglass-polycaprolactone blend approach. These mats offered a good platform to evaluate different calcium release rates as osteogenic promoters in an in vivo subcutaneous environment. Complementary data were collected to complement Ca(2+) release analysis, such as stiffness evaluation by AFM, ζ-potential, morphology evaluation by FESEM, proliferation and differentiation analysis, as well as in vivo subcutaneous implantations. Material and biological characterization suggested that compositions of organic/inorganic hybrid materials with a Si content equivalent to 40%, which were also those that released more calcium, were osteogenic. They also showed a greater ability to form blood vessels. These results suggest that Si-based ormoglasses can be considered an efficient tool for calcium release modulation, which could play a key role in the angiogenic promoting process.
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Affiliation(s)
- Oscar Castaño
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC) , 08028, Barcelona, Spain
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Abstract
Surface properties of biomaterials play a major role in the governing of cell functionalities. It is well known that mechanical, chemical and nanotopographic cues, for example, influence cell proliferation and differentiation. Here, we present a novel coating protocol to produce hierarchically engineered fibrous scaffolds with tailorable surface characteristics, which mimic bone extracellular matrix. Based on the sol-gel method and a succession of surface treatments, hollow electrospun polylactic acid fibres were coated with a silicon-calcium-phosphate bioactive organic-inorganic glass. Compared with pure polymeric fibres that showed a completely smooth surface, the coated fibres exhibited a nanostructured topography and greater roughness. They also showed improved hydrophilic properties and a Young's modulus sixfold higher than non-coated ones, while remaining fully flexible and easy to handle. Rat mesenchymal stem cells cultured on these fibres showed great cellular spreading and interactions with the material. This protocol can be transferred to other structures and glasses, allowing the fabrication of various materials with well-defined features. This novel approach represents therefore a valuable improvement in the production of artificial matrices able to direct stem cell fate through physical and chemical interactions.
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Affiliation(s)
- Nadège Sachot
- Biomaterials for Regenerative Therapies, Institute for Bioengineering of Catalonia (IBEC), Baldiri Reixac 15-21, 08028 Barcelona, Spain
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Álvarez Z, Mateos-Timoneda MA, Hyroššová P, Castaño O, Planell JA, Perales JC, Engel E, Alcántara S. The effect of the composition of PLA films and lactate release on glial and neuronal maturation and the maintenance of the neuronal progenitor niche. Biomaterials 2013; 34:2221-33. [DOI: 10.1016/j.biomaterials.2012.12.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 12/09/2012] [Indexed: 12/12/2022]
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Abstract
Electrospinning is one of the most versatile and effective tools to produce nanostructured fibers in the biomedical science fields. The nanofibrous structure with diameters from tens to hundreds of nanometers largely mimics the native extracellular matrix (ECM) of many tissues. Thus far, a range of compositions including polymers and ceramics and their composites/hybrids have been successfully applied for generating electrospun nanofibers. Different processing tools in electrospinning set-ups and assemblies are currently developed to tune the morphology and properties of nanofibers. Herein, we demonstrate the electrospinning process and the electrospun biomaterials for specific use in tissue regeneration with some examples, involving different material combinations and fiber morphologies.
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Affiliation(s)
- Oscar Castaño
- Institute for Bioengineering of Catalonia, Barcelona, Spain
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Rajzer I, Castaño O, Engel E, Planell JA. Injectable and fast resorbable calcium phosphate cement for body-setting bone grafts. J Mater Sci Mater Med 2010; 21:2049-2056. [PMID: 20386961 DOI: 10.1007/s10856-010-4078-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Accepted: 03/29/2010] [Indexed: 05/29/2023]
Abstract
In this work a calcium phosphate (CPC)/polymer blend was developed with the advantage of being moldable and capable of in situ setting to form calcium deficient hydroxyapatite under physiological conditions in an aqueous environment at body temperature. The CPC paste consists in a mix of R cement, glycerol as a liquid phase carrier and a biodegradable hydrogel such as Polyvinyl alcohol, which acts as a binder. Microstructure and mechanical analysis shows that the CPC blend can be used as an injectable implant for low loaded applications and fast adsorption requirements. The storage for commercial distribution was also evaluated and the properties of the materials obtained do not significantly change during storage at -18 degrees C.
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Affiliation(s)
- I Rajzer
- Institute for Bioengineering of Catalonia (IBEC), C/Baldiri i Reixach, 4-6, Tower I, 10th floor, 08028 Barcelona, Spain
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Abstract
At present, strong requirements in orthopaedics are still to be met, both in bone and joint substitution and in the repair and regeneration of bone defects. In this framework, tremendous advances in the biomaterials field have been made in the last 50 years where materials intended for biomedical purposes have evolved through three different generations, namely first generation (bioinert materials), second generation (bioactive and biodegradable materials) and third generation (materials designed to stimulate specific responses at the molecular level). In this review, the evolution of different metals, ceramics and polymers most commonly used in orthopaedic applications is discussed, as well as the different approaches used to fulfil the challenges faced by this medical field.
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Affiliation(s)
- M Navarro
- Biomaterials, Implants and Tissue Engineering, Institute for Bioengineering of Catalonia (IBEC), CIBER-BBN, 08028 Barcelona, Spain.
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Abstract
Vegetarian diets are those diets mainly based on the consumption of vegetable product, but that also permit consumption of eggs and milk. The American Dietetic Association made a declaration on these vegetarian diets in which they stated that <<a well-planned vegetarian diet is healthy, nutritionally adequate and provides health benefits in the prevention and treatment of certain diseases>>. Some studies have shown beneficial results in obesity, cancer, Parkinson disease, hypertension, type 2 diabetes mellitus and urinary stones, compared with the omnivorous. The possible theoretical benefits in some diseases has been seen in the medical practice (diabetes mellitus, obesity, cardiovascular risk). However more studies are needed in the case of Parkinson's disease and rheumatoid arthritis.
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Affiliation(s)
- D de Luis Román
- Sección de Endocrinología y Nutrición Clínica, Unidad de Apoyo a la nvestigación, Hospital Universitario del Río Hortega, Valladolid, España.
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Piñol S, Castaño O. Kinetics characterization of YBCO thin films growth on LAO (100) single crystals by the TFA-MOD reaction. ACTA ACUST UNITED AC 2006. [DOI: 10.1088/1742-6596/43/1/066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Riis L, Bellotti AC, Castaño O. In field damage of high and low cyanogenic cassava due to a generalist insect herbivore Cyrtomenus bergi (Hemiptera: Cydnidae). J Econ Entomol 2003; 96:1915-1921. [PMID: 14977133] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The hypothesis that cyanogenic potential in cassava roots deters polyphagous insects in the field is relevant to current efforts to reduce or eliminate the cyanogenic potential in cassava. To test this hypothesis, experiments were conducted in the field under natural selection pressure of the polyphagous root feeder Cyrtomenus bergi Froeschner (Hemiptera: Cydnidae). A number of cassava varieties (33) as well as 13 cassava siblings and their parental clone, each representing a determined level of cyanogenic potential (CNP), were scored for damage caused by C. bergi and related to CNP and nonglycosidic cyanogens, measured as hydrogen cyanide. Additionally, 161 low-CNP varieties (< 50 ppm hydrogen cyanide, fresh weight) from the cassava germplasm core collection at Centro Internacional de Agricultura Tropical (CIAT) were screened for resistance/tolerance to C. bergi. Low root damage scores were registered at all levels of CNP. Nevertheless, CNP and yield (or root size) partly explained the damage in cassava siblings (r2 = 0.82) and different cassava varieties (r2 = 0.42), but only when mean values of damage scores were used. This relation was only significant in one of two crop cycles. A logistic model describes the underlying negative relation between CNP and damage. An exponential model describes the underlying negative relation between root size and damage. Damage, caused by C. bergi feeding, released nonglycosidic cyanogens, and an exponential model fits the underlying positive relation. Fifteen low-CNP clones were selected for potential resistance/tolerance against C. bergi.
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Affiliation(s)
- Lisbeth Riis
- Centro International de Agricultural Tropical, Pest and Disease Management Unit, A.A. 6713 Cali, Colombia SA.
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Abboud JL, Castaño O, Dávalos J, Gomperts R. The standard enthalpies of formation of 1- and 2-Adamantyl cations and radicals. An ab initio study. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00212-3] [Citation(s) in RCA: 11] [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] [Indexed: 10/18/2022]
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Abstract
The gas-phase basicity (GB) of tetra-tert-butyltetrahedrane (tBu4THD) was determined by FT-ICR mass spectrometry and comparison with reference compounds of known basicity. Its GB, 1035+/-10 kJ x mol(-1), makes tetra-tert-butyltetrahedrane one of the strongest bases reported so far. Ab initio calculations [B3LYP/6-31G(d) and B3LYP/6-311 + G(d,p)//6-31G(d)] have been carried out in order to compare the high experimental basicity of tBu4THD with that estimated theoretically. Both B3LYP/6-31G(d) and QCISD(T) calculations were used to determine the reaction path which connects the initial tetrahedrane-ammonium complex with the final products, protonated cyclobutadiene (CBDH+) and ammonia.
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Affiliation(s)
- R Notario
- Instituto de Química Física Rocasolano, CSIC Serrano, Madrid, Spain
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Notario R, Castaño O, Abboud JLM, Gomperts R, Frutos LM, Palmeiro R. Organic Thermochemistry at High ab Initio Levels. 1. A G2(MP2) and G2 Study of Cyclic Saturated and Unsaturated Hydrocarbons (Including Aromatics). J Org Chem 1999. [DOI: 10.1021/jo990898e] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. Notario
- Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - O. Castaño
- Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - J.-L. M. Abboud
- Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Gomperts
- Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - L. M. Frutos
- Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Palmeiro
- Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
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Castaño O, Notario R, Abboud JLM, Gomperts R, Palmeiro R, Frutos LM. Organic Thermochemistry at High ab Initio Levels. 2. Meeting the Challenge: Standard Heats of Formation of Gaseous Norbornane, 2-Norbornene, 2,5-Norbornadiene, Cubane, and Adamantane at the G2 Level. J Org Chem 1999. [DOI: 10.1021/jo9908997] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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)
- O. Castaño
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Notario
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - J.-L. M. Abboud
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Gomperts
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Palmeiro
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - L.-M. Frutos
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, CSIC, Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
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Flores H, Dávalos JZ, Abboud JLM, Castaño O, Gomperts R, Jiménez P, R. Notario,* and, Roux MV. The Standard Enthalpy of Formation of the 1-Adamantyl Cation in the Gas Phase. An Experimental and ab Initio Re-assessment. J Phys Chem A 1999. [DOI: 10.1021/jp993313t] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Flores H, Dávalos, Abboud JLM, Castaño O, Gomperts R, Jiménez P, Notario R, Roux MV. The Standard Enthalpy of Formation of the 1-Adamantyl Cation in the Gas Phase. An Experimental and ab Initio Re-assessment. J Phys Chem A 1999. [DOI: 10.1021/jp991262u] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [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)
- H. Flores
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - Dávalos
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - J.-L. M. Abboud
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - O. Castaño
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - R. Gomperts
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - P. Jiménez
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - R. Notario
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
| | - M. V. Roux
- Instituto de Química Física “Rocasolano”, CSIC, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachussets 01749
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Abboud JLM, Castaño O, Herreros M, Leito I, Notario R, Sak K. Thermodynamic Stability of Trichlorocyclopropenyl Cation. An Experimental (FTICR) and Computational [G2(MP2)] Study. J Org Chem 1998. [DOI: 10.1021/jo981369y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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)
- J.-L. M. Abboud
- Instituto de Química Física “Rocasolano”, C. S. I. C., c/Serrano 119. E-28006, Madrid, Spain, and Departamento de Química Física, Universidad de Alcalá. E-28871, Alcalá de Henares, Madrid, Spain
| | - O. Castaño
- Instituto de Química Física “Rocasolano”, C. S. I. C., c/Serrano 119. E-28006, Madrid, Spain, and Departamento de Química Física, Universidad de Alcalá. E-28871, Alcalá de Henares, Madrid, Spain
| | - M. Herreros
- Instituto de Química Física “Rocasolano”, C. S. I. C., c/Serrano 119. E-28006, Madrid, Spain, and Departamento de Química Física, Universidad de Alcalá. E-28871, Alcalá de Henares, Madrid, Spain
| | - I. Leito
- Instituto de Química Física “Rocasolano”, C. S. I. C., c/Serrano 119. E-28006, Madrid, Spain, and Departamento de Química Física, Universidad de Alcalá. E-28871, Alcalá de Henares, Madrid, Spain
| | - R. Notario
- Instituto de Química Física “Rocasolano”, C. S. I. C., c/Serrano 119. E-28006, Madrid, Spain, and Departamento de Química Física, Universidad de Alcalá. E-28871, Alcalá de Henares, Madrid, Spain
| | - K. Sak
- Instituto de Química Física “Rocasolano”, C. S. I. C., c/Serrano 119. E-28006, Madrid, Spain, and Departamento de Química Física, Universidad de Alcalá. E-28871, Alcalá de Henares, Madrid, Spain
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Castaño O, Notario R, Gomperts R, Abboud JLM, Palmeiro R, Andrés JL. Heats of Formation of 1,3,5,7-Cyclooctatetraene and Bicyclo[4.2.0]octa-2,4,7-triene. A High-Level ab Initio Study. J Phys Chem A 1998. [DOI: 10.1021/jp9814303] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- O. Castaño
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Notario
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Gomperts
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - J.-L. M. Abboud
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - R. Palmeiro
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
| | - J. L. Andrés
- Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, 28006 Madrid, Spain, and Silicon Graphics, Inc., One Cabot Road, Hudson, Massachusetts 01749
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Abboud JL, Castaño O, Elguero J, Herreros M, Jagerovic N, Notario R, Sak K. Superacid chemistry in the gas phase: Dissociative proton attachment to halomethanes. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0168-1176(98)00110-4] [Citation(s) in RCA: 14] [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] [Indexed: 11/26/2022]
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Roux MV, Jiménez P, Dávalos JZ, Castaño O, Molina MT, Notario R, Herreros M, Abboud JLM. The First Direct Experimental Determination of Strain in Neutral and Protonated 2-Azetidinone. J Am Chem Soc 1996. [DOI: 10.1021/ja962792w] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [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)
- M. V. Roux
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - P. Jiménez
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - J. Z. Dávalos
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - O. Castaño
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - M. T. Molina
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - R. Notario
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - M. Herreros
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
| | - J.-L. M. Abboud
- Contribution from the Instituto de Química Física “Rocasolano”, C.S.I.C., c/Serrano 119, E-28006 Madrid, Spain, Departamento de Química Física, Universidad de Alcalá de Henares, E-28871 Alcalá de Henares (Madrid), Spain, and Instituto de Química Médica, C.S.I.C., c/Juan de la Cierva 3, E-28006 Madrid, Spain
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