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Hernández D, Zambra C, Astudillo C, Gabriel D, Díaz J. Evolution of physico-chemical parameters, microorganism diversity and volatile organic compound of apple pomace exposed to ambient conditions. Heliyon 2023; 9:e19770. [PMID: 37809461 PMCID: PMC10559057 DOI: 10.1016/j.heliyon.2023.e19770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 10/10/2023] Open
Abstract
In apple processing, waste material known as apple pomace amounts to 45% of production volumes. When this residue is stored in open-air for its stabilization and potential uses, Volatile Organic Compounds (VOCs) are produced, resulting in environmental and odor pollution, and must be managed to avoid their impact. This work aims to study the emission of VOCs utilizing TD-GC/MS and its relationship with changes in physico-chemical (moisture, pH, proteins, among others) and biological (bacteria and fungi using Illumina MiSeq) parameters under three environmental conditions: open-air (outdoors), under-roof (indoors) and oxygen-free. The 8-month study results showed a gradual increase in odorous VOCs and microbial diversity, a product of chemical and biological transformation processes in the samples. A 30% increase in odorant compounds responsible for the unpleasant smell was observed, especially esters, aldehydes and hydrocarbons in samples stored in oxygen-free and Open-air conditions. Increases in VOCs over time were associated with changes in physico-chemical and biological parameters, as well as fluctuations in environmental variables (temperature, relative humidity, and precipitation). The results of this research allow establishing a relationship between storage conditions and the production of VOCs. In addition, recommendations for waste storage time are provided for the most common uses of apple pomace based on the physico-chemical parameters observed, in order to avoid the generation of odorous compounds. Of all storage methods analyzed, under-roof is the most adequate in practice. This study's findings are pertinent for managing agribusiness waste and its potential environmental pollution.
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Affiliation(s)
- D. Hernández
- Institute of Chemistry of Natural Resources, University of Talca, Box 747, Talca, Chile
- Faculty of Engineering, University of Talca, Box 747, Talca, Chile
| | - C. Zambra
- Faculty of Engineering, University of Talca, Box 747, Talca, Chile
| | - C.A. Astudillo
- Faculty of Engineering, University of Talca, Box 747, Talca, Chile
| | - D. Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - J. Díaz
- Faculty of Engineering, University of Talca, Box 747, Talca, Chile
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2
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Kober J, Scalerandi M, Gabriel D. Robust determination of relaxation times spectra of long-time multirelaxation processes. Phys Rev E 2023; 107:035302. [PMID: 37073054 DOI: 10.1103/physreve.107.035302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 02/27/2023] [Indexed: 04/20/2023]
Abstract
Long-time relaxation processes occur in numerous physical systems. They are often regarded as multirelaxation processes, which are a superposition of exponential decays with a certain distribution of relaxation times. The relaxation times spectra often convey information about the underlying physics. Extracting the spectrum of relaxation times from experimental data is, however, difficult. This is partly due to the mathematical properties of the problem and partly due to experimental limitations. In this paper, we perform the inversion of time-series relaxation data into a relaxation spectrum using the singular value decomposition accompanied by the Akaike information criterion estimator. We show that this approach does not need any a priori information on the spectral shape and that it delivers a solution that consistently approximates the best one achievable for given experimental dataset. On the contrary, we show that the solution obtained imposing an optimal fit of experimental data is often far from reconstructing well the distribution of relaxation times.
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Affiliation(s)
- J Kober
- Institute of Thermomechanics of the Czech Academy of Sciences, Prague 18200, Czech Republic
| | - M Scalerandi
- DISAT, Condensed Matter Physics and Complex Systems Institute, Politecnico di Torino 10129, Italy
| | - D Gabriel
- Institute of Thermomechanics of the Czech Academy of Sciences, Prague 18200, Czech Republic
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3
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Zhou X, Fernández-Palacios E, Dorado AD, Gamisans X, Gabriel D. Assessing main process mechanism and rates of sulfate reduction by granular biomass fed with glycerol under sulfidogenic conditions. Chemosphere 2022; 286:131649. [PMID: 34325258 DOI: 10.1016/j.chemosphere.2021.131649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/16/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Sulfate-reducing bioreactors for sulfide production are the initial stage of processes targeting elemental sulfur recovery from sulfate-rich effluents. In this work, the principal reactions involved in glycerol fermentation and sulfate reduction using glycerol and its fermentation products as electron donors were assessed together with their specific consumption/production rates. A battery of batch activity tests with and without sulfate were performed with glycerol and with each fermentation product using a non-methanogenic but sulfidogenic granular sludge from an up-flow anaerobic sludge blanket (UASB) reactor operated under long-term while fed with crude glycerol. As a result, a mechanistic approach based on the experimental observations is proposed in this work. Glycerol was mainly fermented to 1,3-propanediol, ethanol, formate, propionate and acetate by fermentative bacteria. All organic intermediates were found to be further used by sulfate reducing bacteria (SRB) for sulfate reduction except for acetate. The most abundant genus detected under sulfidogenic conditions were Propionispora (15.2%), Dysgonomonas (13.2%), Desulfobulbus (11.6%) and Desulfovibrio (10.8%). The last two SRB genera accounted for 22.4% of the total amount of retrieved sequences, which were probably performing an incomplete oxidation of the carbon source in the sulfidogenic UASB reactor. As single substrates, specific sulfate reduction rates (SRRs) using low molecular weight (MW) carbon sources (formate and ethanol) were 39% higher than those using high-MW ones (propionate, 1,3-propanediol and butanol). However, SRRs in glycerol-fed tests showed that 1,3-propanediol played a major role in sulfate reduction in addition to formate and ethanol.
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Affiliation(s)
- X Zhou
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - E Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - A D Dorado
- Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08242, Manresa, Spain
| | - X Gamisans
- Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08242, Manresa, Spain
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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Guerra-Gorostegi N, González D, Puyuelo B, Ovejero J, Colón J, Gabriel D, Sánchez A, Ponsá S. Biomass fuel production from cellulosic sludge through biodrying: Aeration strategies, quality of end-products, gaseous emissions and techno-economic assessment. Waste Manag 2021; 126:487-496. [PMID: 33838388 DOI: 10.1016/j.wasman.2021.03.036] [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] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
This study assesses the technological, environmental and economic feasibility of biodrying to valorise cellulosic sludge as a renewable energy source. Specifically, three different aeration strategies were compared in terms of biodrying performance, energetic consumption, gaseous emissions, quality of end-products and techno-economic analysis. These strategies were based on different combinations of convective drying with biogenic heat produced. Two innovative biodrying performance indicators (Energetic Biodrying Index and Biodrying Performance Index) were proposed to better assess the initial and operational conditions that favour the maximum energy process efficiency and the highest end-product quality. The end-products obtained consistently presented moisture contents below 40% and lower heating values above 9.4 MJ·kg-1. However, the best values achieved were 32.6% and 10.4 MJ·kg-1 for moisture content and lower heating value, respectively. Low N2O and CH4 emissions confirmed the effective aeration of all three strategies carried out, while NH4 and tVOCs were related either to temperature or biological phenomena. A techno-economic analysis proved the economic viability and attractiveness of the biodrying technology for cellulosic sludge in all the strategies applied.
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Affiliation(s)
- N Guerra-Gorostegi
- BETA Technological Center, Science and Technology Faculty, University of Vic-Central University of Catalonia, 08500 Vic, Barcelona, Spain
| | - D González
- Composting Research Group (GICOM), Dept. of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain; Group of Biological Treatment of Liquid and Gaseous Effluents (GENOCOV), Dept. of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - B Puyuelo
- BETA Technological Center, Science and Technology Faculty, University of Vic-Central University of Catalonia, 08500 Vic, Barcelona, Spain
| | - J Ovejero
- BETA Technological Center, Science and Technology Faculty, University of Vic-Central University of Catalonia, 08500 Vic, Barcelona, Spain
| | - J Colón
- BETA Technological Center, Science and Technology Faculty, University of Vic-Central University of Catalonia, 08500 Vic, Barcelona, Spain
| | - D Gabriel
- Group of Biological Treatment of Liquid and Gaseous Effluents (GENOCOV), Dept. of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - A Sánchez
- Composting Research Group (GICOM), Dept. of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - S Ponsá
- BETA Technological Center, Science and Technology Faculty, University of Vic-Central University of Catalonia, 08500 Vic, Barcelona, Spain.
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Aguiar de Sousa D, Pereira-Santos MC, Serra-Caetano A, Lucas Neto L, Sousa AL, Gabriel D, Correia M, Gil-Gouveia R, Oliveira R, Penas S, Carvalho Dias M, Correia MA, Carvalho M, Sousa AE, Canhão P, Ferro JM. Blood biomarkers associated with inflammation predict poor prognosis in cerebral venous thrombosis:: a multicenter prospective observational study. Eur J Neurol 2020; 28:202-208. [PMID: 32918842 DOI: 10.1111/ene.14526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 08/31/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE Experimental studies suggest inflammation can contribute to blood barrier disruption and brain injury in cerebral venous thrombosis (CVT). We aimed to determine whether blood biomarkers of inflammation were associated with the evolution of brain lesions, persistent venous occlusion or functional outcome in patients with CVT. METHODS Pathophysiology of Venous Infarction-Prediction of Infarction and Recanalization in CVT (PRIORITy-CVT) was a multicenter prospective cohort study of patients with newly diagnosed CVT. Evaluation of neutrophil-to-lymphocyte ratio (NLR) and C-reactive protein (CRP) concentrations in peripheral blood samples was performed at admission in 62 patients. Additional quantification of interleukin (IL)-6 was performed at day 1, 3 and 8 in 35 patients and 22 healthy controls. Standardized magnetic resonance imaging was performed at day 1, 8 and 90. Primary outcomes were early evolution of brain lesion, early recanalization and functional outcome at 90 days. RESULTS Interleukin-6 levels were increased in patients with CVT with a peak at baseline. IL-6, NLR and CRP levels were not related with brain lesion outcomes or early recanalization but had a significant association with unfavourable functional outcome at 90 days (IL-6: OR = 1.28, 95% CI: 1.05-1.56, P = 0.046; NLR: OR = 1.39, 95% CI: 1.4-1.87, P = 0.014; CRP: OR = 1.756, 95% CI: 1.010-3.051, P = 0.029). Baseline IL-6 had the best discriminative capacity, with an area under the receiver operating characteristic curve to predict unfavourable functional outcome of 0.74 (P = 0.031). CONCLUSIONS Increased baseline levels of NLR, CRP and IL-6 may serve as new predictive markers of worse functional prognosis at 90 days in patients with CVT. No association was found between inflammatory markers and early evolution of brain lesion or venous recanalization.
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Affiliation(s)
- D Aguiar de Sousa
- Department, of Neurosciences and Mental Health (Neurology), Hospital Santa Maria/Centro Hospitalar Universitário Lisboa Norte, Lisbon.,Institute of Anatomy, Faculdade de Medicina, Universidade de Lisboa, Lisbon.,Instituto de Medicina Molecular João Lobo Antunes, Lisbon, Portugal
| | | | - A Serra-Caetano
- Instituto de Medicina Molecular João Lobo Antunes, Lisbon, Portugal
| | - L Lucas Neto
- Institute of Anatomy, Faculdade de Medicina, Universidade de Lisboa, Lisbon.,Department of Neuroradiology, Hospital de Santa Maria/Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - A L Sousa
- Department of Neurology, Centro Hospitalar de Entre Douro e Vouga, Santa Maria da Feira, Portugal
| | - D Gabriel
- Department of Neurology, Centro Hospitalar Universitário do Porto - Hospital Santo António, Porto, Portugal
| | - M Correia
- Department of Neurology, Centro Hospitalar Universitário do Porto - Hospital Santo António, Porto, Portugal
| | - R Gil-Gouveia
- Department of Neurology, Hospital da Luz, Lisbon, Portugal
| | - R Oliveira
- Department of Neurology, Hospital da Luz, Lisbon, Portugal
| | - S Penas
- Institute of Anatomy, Faculdade de Medicina, Universidade de Lisboa, Lisbon
| | - M Carvalho Dias
- Department, of Neurosciences and Mental Health (Neurology), Hospital Santa Maria/Centro Hospitalar Universitário Lisboa Norte, Lisbon
| | - M A Correia
- Department of Neuroradiology, Hospital de Santa Maria/Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - M Carvalho
- Department of Neurology, Centro Hospitalar Universitário de São João and Faculty of Medicine, University of Porto, Porto, Portugal
| | - A E Sousa
- Instituto de Medicina Molecular João Lobo Antunes, Lisbon, Portugal
| | - P Canhão
- Department, of Neurosciences and Mental Health (Neurology), Hospital Santa Maria/Centro Hospitalar Universitário Lisboa Norte, Lisbon.,Instituto de Medicina Molecular João Lobo Antunes, Lisbon, Portugal
| | - J M Ferro
- Department, of Neurosciences and Mental Health (Neurology), Hospital Santa Maria/Centro Hospitalar Universitário Lisboa Norte, Lisbon.,Instituto de Medicina Molecular João Lobo Antunes, Lisbon, Portugal
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6
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Mora M, Fernández-Palacios E, Guimerà X, Lafuente J, Gamisans X, Gabriel D. Feasibility of S-rich streams valorization through a two-step biosulfur production process. Chemosphere 2020; 253:126734. [PMID: 32302909 DOI: 10.1016/j.chemosphere.2020.126734] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/19/2020] [Accepted: 04/04/2020] [Indexed: 06/11/2023]
Abstract
A bioscrubbing process named SONOVA has been developed, tested and assessed herein to valorize flue gases containing SOx. The process consists in a first scrubbing stage, to absorb and oxidize SO2 to sulfate, followed by a two-step biological stage. It consists of (1) an up-flow anaerobic sludge (UASB) reactor to reduce sulfate to sulfide with crude glycerol and (2) a continuous stirred tank reactor (CSTR) to partially oxidize sulfide to elemental sulfur (S0). SONOVA integrates the reutilization of resources, using the effluent of the biological stage as a sorbent agent and the residual heat of flue gases to dry the product. S0 is then obtained as a value-added product, which nowadays is produced from fossil fuels. In this research, SO2 concentrations up to 4000 ppmv were absorbed in 2 s of gas contact time in the spray-scrubber with removal efficiencies above 80%. The UASB reduced up to 9.3 kg S-Sulfate m-3 d-1 with sulfide productivities of 6 kg S m-3 d-1 at an hydraulic retention time (HRT) as low as 2 h. Finally, CSTR was fed with the UASB effluent and operated at HRT ranging from 12 h to 4 h without biomass wash-out. Sulfide was fully oxidized to S0 with a productivity of 2.3 kg S m-3 d-1 at the lowest HRT tested. Overall, this research has explored not only maximum capabilities of each SONOVA stage but has also assessed the interactions between the different units, which opens up the possibility of recovering S0 from harmful SOx emissions, optimizing resources utilization and costs.
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Affiliation(s)
- M Mora
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
| | - E Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - X Guimerà
- Department of Mining Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08240, Manresa, Spain
| | - J Lafuente
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - X Gamisans
- Department of Mining Industrial and ICT Engineering, Universitat Politècnica de Catalunya, Avinguda de les Bases de Manresa 61-73, 08240, Manresa, Spain
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
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7
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Spennati F, Mora M, Bardi A, Becarelli S, Siracusa G, Di Gregorio S, Gabriel D, Mori G, Munz G. Respirometric techniques coupled with laboratory-scale tests for kinetic and stoichiometric characterisation of fungal and bacterial tannin-degrading biofilms. Water Sci Technol 2020; 81:2559-2567. [PMID: 32857743 DOI: 10.2166/wst.2020.315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In environmental biotechnology applications for wastewater treatment, bacterial-based bioprocesses are mostly implemented; on the contrary, the application of fungal-based bioprocesses, is still challenging under non-sterile conditions. In a previous laboratory-scale study, we showed that when specific tannins are used as the sole carbon source, fungi can play a key role in the microbial community, under non-sterile conditions and in the long term. In a previous study, an engineered ecosystem, based on fungal tannin biodegradation, was successfully tested in a laboratory-scale bioreactor under non-sterile conditions. In the present study, a kinetic and stoichiometric characterisation of the biomass developed therein was performed through the application of respirometric techniques applied to the biomass collected from the above-mentioned reactor. To this aim, a respirometric set-up was specifically adapted to obtain valuable information from tannin-degrading fungal biofilms. A mathematical model was also developed and applied to describe both the respirometric profiles and the experimental data collected from the laboratory-scale tests performed in the bioreactor. The microbial growth was described through a Monod-type kinetic equation as a first approach. Substrate inhibition, decay rate and tannin hydrolysis process were included to better describe the behaviour of immobilised biomass selected in the tannin-degrading bioreactor. The model was implemented in AQUASIM using the specific tool Biofilm Compartment to simulate the attached fungal biofilm. Biofilm features and transport parameters were either measured or assumed from the literature. Key kinetic and stoichiometric unknown parameters were successfully estimated, overcoming critical steps for scaling-up a novel fungal-based technology for tannins biodegradation.
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Affiliation(s)
- F Spennati
- Laboratorio Cer2co, Consorzio Cuoio-Depur S.p.A,Via Arginale Ovest, 81-S.Miniato 56020, Pisa, Italy E-mail:
| | - M Mora
- GENOCOV, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - A Bardi
- Department of Civil and Environmental Engineering, University of Florence, Via di S. Marta, 3, 50121, Firenze, Italy
| | - S Becarelli
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy
| | - G Siracusa
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy
| | - S Di Gregorio
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy
| | - D Gabriel
- GENOCOV, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - G Mori
- Laboratorio Cer2co, Consorzio Cuoio-Depur S.p.A,Via Arginale Ovest, 81-S.Miniato 56020, Pisa, Italy E-mail:
| | - G Munz
- Department of Civil and Environmental Engineering, University of Florence, Via di S. Marta, 3, 50121, Firenze, Italy
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Gabriel D, Hubert M, Coster M, Routiaux C, El Khouda S, Verbrugge AM, Joris J. Reprise alimentaire au cours du premier mois après chirurgie colorectale élective dans un protocole RAC. NUTR CLIN METAB 2020. [DOI: 10.1016/j.nupar.2020.02.374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dahmana N, Kowalczuk L, Gabriel D, Behar-Cohen F, Gurny R, Kalia YN. Ocular Biodistribution of Spironolactone after a Single Intravitreal Injection of a Biodegradable Sustained-Release Polymer in Rats. Mol Pharm 2020; 17:59-69. [PMID: 31751144 DOI: 10.1021/acs.molpharmaceut.9b00707] [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] [Indexed: 11/28/2022]
Abstract
Sustained-release formulations for ocular delivery are of increasing interest given their potential to significantly improve treatment efficacy and patient adherence. The objectives of this study were (i) to develop a sustained-release formulation of spironolactone (SPL) using a biodegradable and injectable polymer, hexyl-substituted poly-lactic acid (hexPLA) and (ii) to investigate the ocular biodistribution and tolerability of SPL and its metabolites in rats in vivo over 1 month following a single intravitreal injection (IVT inj). The concentrations of SPL and its two principal active metabolites, 7α-thiomethylspironolactone and canrenone (CAN), in the different ocular compartments were determined at different time points (3, 7, and 31 days after IVT inj) using a validated ultra-high-performance liquid chromatography-mass spectrometry method. Systemic exposure following a single IVT inj of 5% SPL-hexPLA formulation was evaluated by quantifying SPL and its metabolites in the plasma. Ocular tolerability of the formulation was evaluated using in vivo retinal imaging and histology. In vitro release studies revealed a sustained release of SPL from 5% SPL-hexPLA for up to 65 days. In vivo studies showed that SPL and its metabolites were detected in all ocular tissues at 3 and 7 days post-IVT inj. At 31 days post-IVT inj, SPL and CAN were mainly detected in the retina. These results also highlighted the clearance pathway of SPL and its metabolite involving the anterior and posterior routes in the first week (days 3 and 7), then mainly the posterior segment in the last week (day 31). This study showed that a single IVT inj of 5% SPL-hexPLA in rats enabled sustained delivery of therapeutic amounts of SPL for up to 1 month to the retina without systemic exposure. This formulation may be of interest for the local treatment of diseases involving overactivation of the mineralocorticoid receptor in the chorioretina such as chronic central serous chorioretinopathy.
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Affiliation(s)
- Naoual Dahmana
- School of Pharmaceutical Sciences , University of Geneva & University of Lausanne , CMU-Rue Michel Servet 1 , 1211 Geneva 4 , Switzerland
| | - Laura Kowalczuk
- Faculty of Biology and Medicine , University of Lausanne , Rue du Bugnon 21 , 1011 Lausanne , Switzerland.,Jules-Gonin Eye Hospital, Fondation Asile des Aveugles , Avenue de France 15 , 1004 Lausanne , Switzerland
| | - Doris Gabriel
- Apidel SA , Quai du Mont Blanc 29 , 1201 Geneva , Switzerland
| | - Francine Behar-Cohen
- Faculty of Biology and Medicine , University of Lausanne , Rue du Bugnon 21 , 1011 Lausanne , Switzerland.,Centre de Recherche des Cordeliers, Université de Paris , INSERM U1138, Team Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris , France.,Hôpital Cochin - Assistance Publique Hôpitaux de Paris , Ophtalmopole , Paris , France
| | - Robert Gurny
- School of Pharmaceutical Sciences , University of Geneva & University of Lausanne , CMU-Rue Michel Servet 1 , 1211 Geneva 4 , Switzerland.,Apidel SA , Quai du Mont Blanc 29 , 1201 Geneva , Switzerland
| | - Yogeshvar N Kalia
- School of Pharmaceutical Sciences , University of Geneva & University of Lausanne , CMU-Rue Michel Servet 1 , 1211 Geneva 4 , Switzerland
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10
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Fernández-Palacios E, Lafuente J, Mora M, Gabriel D. Exploring the performance limits of a sulfidogenic UASB during the long-term use of crude glycerol as electron donor. Sci Total Environ 2019; 688:1184-1192. [PMID: 31726549 DOI: 10.1016/j.scitotenv.2019.06.371] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 06/22/2019] [Accepted: 06/22/2019] [Indexed: 06/10/2023]
Abstract
SOx contained in flue gases and S-rich liquid effluents can be valorized to recover elemental sulfur in a two-stage bioscrubbing process. The reduction of sulfate to sulfide is the most crucial stage to be optimized. In this study, the long-term performance of an up-flow anaerobic sludge blanket (UASB) reactor using crude glycerol as electron donor was assessed. The UASB was operated for 400 days with different sulfate and organic loading rates (SLR and OLR, respectively) and a COD/S-SO42- ratio ranging from 3.8 g O2 g-1 S to 5.4 g O2 g-1 S. After inoculation with methanogenic, granular biomass, the competition between sulfate-reducing and methanogenic microorganisms determined to what extent dissolved sulfide and methane were produced. After the complete washout of methanogens, which was revealed by next-generation sequencing analysis, the highest S-EC was reached in the system. The highest average sulfate elimination capacity (S-EC = 4.3 kg S m-3d-1) was obtained at a COD/S-SO42- ratio of 5.4 g O2 g-1 S and an OLR of 24.4 kg O2 m-3d-1 with a sulfate removal efficiency of 94%. The conversion of influent COD to methane decreased from 12% to 2.5% as the SLR increased while a large fraction of acetate (35% of the initial COD) was accumulated. Our data indicate that crude glycerol can promote sulfidogenesis. However, the disappearance of methanogens in the long-term due to the out competition by sulfate reducing bacteria, lead to such large accumulation of acetate.
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Affiliation(s)
- E Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - J Lafuente
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - M Mora
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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11
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Gabriel D, Kojima R, Hoshiba K, Itoyama K, Nishida K, Nakadai K. 2D sound source position estimation using microphone arrays and its application to a VR-based bird song analysis system. Adv Robot 2019. [DOI: 10.1080/01691864.2019.1598491] [Citation(s) in RCA: 2] [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: 10/27/2022]
Affiliation(s)
- D. Gabriel
- Department of Systems and Control Engineering, School of Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - R. Kojima
- Department of Biomedical Data Intelligence, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - K. Hoshiba
- Department of Electrical, Electronics and Information Engineering, Faculty of Engineering, Kanagawa University, Yokohama, Japan
| | - K. Itoyama
- Department of Systems and Control Engineering, School of Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - K. Nishida
- Department of Systems and Control Engineering, School of Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - K. Nakadai
- Department of Systems and Control Engineering, School of Engineering, Tokyo Institute of Technology, Tokyo, Japan
- Honda Research Institute Japan Co., Ltd., Wako, Japan
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12
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Spennati F, Mora M, Tigini V, La China S, Di Gregorio S, Gabriel D, Munz G. Removal of Quebracho and Tara tannins in fungal bioreactors: Performance and biofilm stability analysis. J Environ Manage 2019; 231:137-145. [PMID: 30340133 DOI: 10.1016/j.jenvman.2018.10.001] [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] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 08/27/2018] [Accepted: 10/01/2018] [Indexed: 06/08/2023]
Abstract
Tannins are polyphenolic compounds produced by plants that are used in the vegetable tanning of leather at industrial scale. Quebracho tannin and Tara tannin are intensively used by the tanning industry and are two of the most recalcitrant compounds that can be found in tannery wastewaters. In this study two reactors fed with Quebracho tannin and Tara tannin, respectively, were inoculated with polyurethane foam cubes colonized with a fungal strain biofilm of Aspergillus tubingensis MUT 990. A stable biofilm was maintained in the reactor fed with Quebracho tannin during 180 days of operation. Instead, biofilm got detached from the foam cubes during the start-up of the reactor fed with Tara tannin and a bacterial-based suspended culture was developed and preserved along the operational period (226 days). Soluble chemical oxygen demand removals up to 53% and 90% and maximum elimination capacities of 9.1 g sCOD m-3 h-1 and 37.9 g sCOD m-3 h-1 of Quebracho and Tara tannins, respectively, were achieved in the reactors without the addition of co-substrates. Next generation sequencing analysis for bacteria and fungi showed that a fungal consortium was developed in the reactor fed with Quebracho tannin while fungi were outcompeted by bacteria in the reactor fed with Tara tannin. Furthermore, Quebracho and Tara tannins were successfully co-treated in a single reactor where both fungi and bacteria were preserved.
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Affiliation(s)
- F Spennati
- Department of Environmental and Civil and Environmental, University of Florence, Via Santa Marta 3, 50139, Firenze, Italy.
| | - M Mora
- GENOCOV, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - V Tigini
- Department of Life Sciences and Systems Biology, University of Turin, Viale Mattioli 25, 10125, Torino, Italy
| | - S La China
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
| | - S Di Gregorio
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
| | - D Gabriel
- GENOCOV, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - G Munz
- Department of Environmental and Civil and Environmental, University of Florence, Via Santa Marta 3, 50139, Firenze, Italy
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13
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Mora M, Lafuente J, Gabriel D. Screening of biological sulfate reduction conditions for sulfidogenesis promotion using a methanogenic granular sludge. Chemosphere 2018; 210:557-566. [PMID: 30029148 DOI: 10.1016/j.chemosphere.2018.07.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/01/2018] [Accepted: 07/05/2018] [Indexed: 06/08/2023]
Abstract
Effluents containing great amounts of oxidized sulfur compounds, such as sulfate or sulfite, can be valorized as elemental sulfur from a sequential reduction-oxidation biological process. However, the most important, challenging step to be optimized is the reduction of sulfate. The present study aimed at seeking out the optimal conditions to promote sulfidogenesis instead of methanogenesis using waste carbon sources and a methanogenic granular sludge. Crude glycerol showed better results in terms of the consumed COD/S-Sulfate ratio compared with acetate, cheese whey, pig slurry, and vinasse. Then, the screening of several conditions (T, pH, and COD/S-Sulfate ratio) and the effects of air presence and dissolved sulfide inhibition on sulfate reduction was carried out. Sulfidogenesis was promoted at 35 °C, pH = 8.5, COD/S-Sulfate ratio above 7.0 g O2 g-1 S, microaerophilic conditions, and dissolved sulfide concentrations below 250 mg S2- L-1. These conditions were tested for nearly 3 months in the startup and operation of a 2 L UASB reactor. An inlet sulfate concentration of 220 mg S L-1 and an HRT of 2 h were set. Removal efficiencies of approximately 90% were obtained with less than 20% of organic matter destined for biogas production.
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Affiliation(s)
- M Mora
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - J Lafuente
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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14
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Hernández D, Astudillo CA, Fernández-Palacios E, Cataldo F, Tenreiro C, Gabriel D. Evolution of physical-chemical parameters, microbial diversity and VOC emissions of olive oil mill waste exposed to ambient conditions in open reservoirs. Waste Manag 2018; 79:501-509. [PMID: 30343781 DOI: 10.1016/j.wasman.2018.08.022] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 08/09/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
In the olive oil extraction process, 20% olive oil is obtained. About 80% corresponds to waste, mainly alperujo and orujo. When these residues are stored in open reservoirs for later stabilization or potential reuse, odorous Volatile Organic Compounds (VOCs) are generated as products of waste decomposition. In this work, these emissions were studied by means of TD-GC/MS in relation to the changes in the physical-chemical (ashes, moisture, total phenols, pH, proteins, fibers, oils, fats) and biological parameters (bacterial and fungal diversity in Illumina platform) of waste for 6 months. The dynamics of these parameters were statistically related to the evolution of environmental variables (temperature, relative humidity, precipitation) and their effects on the most relevant physical-chemical parameters in order to evaluate their incidence in odorant VOCs emissions over time. The results showed a progressive increase in the diversity of both fungi and bacteria that were related, mainly, to a progressive decrease in the concentration of fatty acid methyl esters and the concentration of alkenes in the emissions; and to an increase of odorous compounds, mainly aldehydes, ketones and carboxylic acids, which were responsible for the unpleasant odors of waste. No significant differences were observed between the evolution of orujo characteristics compared to those of alperujo.
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Affiliation(s)
- D Hernández
- Institute of Chemistry of Natural Resources, University of Talca, Box 747, Talca, Chile; Faculty of Engineering, University of Talca, Box 747, Talca, Chile; GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - C A Astudillo
- Faculty of Engineering, University of Talca, Box 747, Talca, Chile
| | - E Fernández-Palacios
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - F Cataldo
- Institute of Chemistry of Natural Resources, University of Talca, Box 747, Talca, Chile; Faculty of Engineering, University of Talca, Box 747, Talca, Chile
| | - C Tenreiro
- Faculty of Engineering, University of Talca, Box 747, Talca, Chile
| | - D Gabriel
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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15
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Kasper M, Gabriel D, Möller M, Bauer D, Wildschütz L, Courthion H, Rodriguez-Aller M, Busch M, Böhm MRR, Loser K, Thanos S, Gurny R, Heiligenhaus A. Cyclosporine A-Loaded Nanocarriers for Topical Treatment of Murine Experimental Autoimmune Uveoretinitis. Mol Pharm 2018; 15:2539-2547. [PMID: 29912566 DOI: 10.1021/acs.molpharmaceut.8b00014] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present study, tissue distribution and the therapeutic effect of topically applied cyclosporine A (CsA)-loaded methoxy-poly(ethylene-glycol)-hexyl substituted poly(lactic acid) (mPEGhexPLA) nanocarriers (ApidSOL) on experimental autoimmune uveitis (EAU) were investigated. The CsA-loaded mPEGhexPLA nanocarrier was tolerated well locally and showed no signs of immediate toxicity after repeated topical application in mice with EAU. Upon unilateral CsA treatment, CsA accumulated predominantly in the corneal and sclera-choroidal tissue of the treated eye and in lymph nodes (LN). This regimen reduced EAU severity in treated eyes compared to PBS-treated controls. This improvement was accompanied by reduced T-cell count, T-cell proliferation, and IL-2 secretion of cells from ipsilateral LN. In conclusion, topical treatment with CsA-loaded mPEGhexPLA nanocarriers significantly improves the outcome of EAU.
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Affiliation(s)
- Maren Kasper
- Department of Ophthalmology and Ophtha-Lab , St. Franziskus Hospital , Münster 48145 , Germany
| | | | - Michael Möller
- School of Pharmaceutical Sciences, University of Geneva and University of Lausanne, Geneva 1221 , Switzerland
| | - Dirk Bauer
- Department of Ophthalmology and Ophtha-Lab , St. Franziskus Hospital , Münster 48145 , Germany
| | - Lena Wildschütz
- Department of Ophthalmology and Ophtha-Lab , St. Franziskus Hospital , Münster 48145 , Germany
| | | | - Marta Rodriguez-Aller
- School of Pharmaceutical Sciences, University of Geneva and University of Lausanne, Geneva 1221 , Switzerland
| | - Martin Busch
- Department of Ophthalmology and Ophtha-Lab , St. Franziskus Hospital , Münster 48145 , Germany
| | - Michael R R Böhm
- Department of Ophthalmology, Clinic for Diseases of the Anterior Segments of the Eyes , Essen University Hospital , Essen 45147 , Germany
| | | | | | - Robert Gurny
- Apidel SA , Geneva 1201 , Switzerland.,School of Pharmaceutical Sciences, University of Geneva and University of Lausanne, Geneva 1221 , Switzerland
| | - Arnd Heiligenhaus
- Department of Ophthalmology and Ophtha-Lab , St. Franziskus Hospital , Münster 48145 , Germany.,University of Duisburg-Essen , Essen 47057 , Germany
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16
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Dahmana N, Gabriel D, Gurny R, Kalia YN. Development and validation of a fast and sensitive UHPLC-ESI-MS method for the simultaneous quantification of spironolactone and its metabolites in ocular tissues. Biomed Chromatogr 2018; 32:e4287. [PMID: 29767448 DOI: 10.1002/bmc.4287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 04/20/2018] [Accepted: 05/04/2018] [Indexed: 11/09/2022]
Abstract
Glucocorticoids are a mainstay for the treatment of immune-mediated conditions and inflammatory diseases. However, their chronic use causes numerous side-effects including delays in corneal and cutaneous wound healing. This is attributed to off-target agonism of the mineralocorticoid receptor, which can be reduced by co-administration of a mineralocorticoid receptor antagonist such as spironolactone. The aim of this study was to develop a fast, selective and sensitive UHPLC-ESI-MS method for the simultaneous quantification of spironolactone, its active metabolites (7α-thiomethylspironolactone and canrenone), the latter's water-soluble prodrug potassium canrenoate and the synthetic glucocorticoid, dexamethasone, in corneal samples (17α-methyltestosterone served as an internal standard). A one-step extraction procedure using MeOH-H2 O (1:1) was validated and employed to recover the analytes from the corneal tissue. Extracts were centrifuged and the supernatant analyzed under isocratic conditions. Compounds were detected using selected ion recording mode. The method satisfied US Food and Drug Administration guidelines with respect to selectivity, precision and accuracy and displayed linearity from 5 to 1000 ng/mL for all of the analytes. The lower limit of quantitation of the method was 5 ng/mL, making it sufficiently sensitive for quantification of the analytes in samples from in vivo studies.
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Affiliation(s)
- Naoual Dahmana
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Lausanne, Switzerland
| | | | - Robert Gurny
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Lausanne, Switzerland.,Apidel SA, Geneva, Switzerland
| | - Yogeshvar N Kalia
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Lausanne, Switzerland
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17
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Dahmana N, Mugnier T, Gabriel D, Kaltsatos V, Bertaim T, Behar-Cohen F, Gurny R, Kalia YN. Topical Administration of Spironolactone-Loaded Nanomicelles Prevents Glucocorticoid-Induced Delayed Corneal Wound Healing in Rabbits. Mol Pharm 2018; 15:1192-1202. [DOI: 10.1021/acs.molpharmaceut.7b01028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Naoual Dahmana
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, CMU - 1 rue Michel Servet, 1211 Geneva 4, Switzerland
| | | | - Doris Gabriel
- Apidel SA, 29 Quai du Mont Blanc, 1201 Geneva, Switzerland
| | | | - Thierry Bertaim
- CEVA Santé Animal, 10 Avenue de la Ballastière, 33500 Libourne, France
| | - Francine Behar-Cohen
- Fondation Asile des Aveugles, Hôpital Ophtalmique Jules-Gonin, 15 Avenue de France, 1004 Lausanne, Switzerland
- INSERM, UMRS 872 Team 17, Centre de Recherche des Cordeliers, 15 rue de l’Ecole de Médecine, 75006 Paris, France
| | - Robert Gurny
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, CMU - 1 rue Michel Servet, 1211 Geneva 4, Switzerland
- Apidel SA, 29 Quai du Mont Blanc, 1201 Geneva, Switzerland
| | - Yogeshvar N. Kalia
- School of Pharmaceutical Sciences, University of Geneva & University of Lausanne, CMU - 1 rue Michel Servet, 1211 Geneva 4, Switzerland
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18
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Kasper M, Gabriel D, Möller M, Bauer D, Wildschütz L, Courthion H, Böhm MRR, Busch M, Loser K, Thanos S, Gurny R, Heiligenhaus A. Novel everolimus-loaded nanocarriers for topical treatment of murine experimental autoimmune uveoretinitis (EAU). Exp Eye Res 2018; 168:49-56. [PMID: 29326066 DOI: 10.1016/j.exer.2018.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/17/2017] [Accepted: 01/05/2018] [Indexed: 01/14/2023]
Abstract
In the present study, therapeutic effect of topically applied everolimus (EV)-loaded methoxy-poly(ethylene-glycol)-hexyl substituted poly (lactic acid) (mPEGhexPLA) nanocarriers on experimental autoimmune uveoretinitis (EAU) were investigated. EAU was induced in B10.RIII mice via immunization with human interphotoreceptor retinoid-binding protein peptide 161-180 (hIRBPp161-180) in complete Freund's adjuvant. Everolimus-loaded mPEGhexPLA (EV/mPEGhexPLA) nanocarriers were prepared by using a solvent evaporation method. On days 12-21 postimmunization (p.i.), the right eyes were treated five times daily either with 10 μl of 0.5% everolimus formulation or PBS (control). The EAU score of the eyes was determined histologically. On day 21 p.i., the peripheral immune responses were measured in serum, cervical lymph nodes (LN), and spleens via hIRBPp161-180-specific serum antibodies, cytokine secretion (ELISA), lymphocyte proliferation, and FoxP3+ regulatory T cells (Treg; flow cytometry). Compared to the PBS-treated mice, unilateral topical everolimus treatment significantly reduced EAU severity in both eyes (p < .05). The treatment reduced the antigen (Ag)-specific hIRBPp161-180-induced proliferation (p < .05), IL-2, IL-17, and IFN-γ secretion from cells isolated from the left and right cervical LN (p < .05). Under everolimus treatment, IL-10 secretion and CD4+CD25+FoxP3+ Treg frequency from cervical LN were enhanced. The proliferative response and cytokine secretion as well as the frequency of splenic Treg were almost unchanged. Topical administration of an everolimus formulation improved EAU in both eyes. The effect might also be related to systemic immunosuppressive effects, as several systemic cellular immune responses were influenced.
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Affiliation(s)
- Maren Kasper
- Department of Ophthalmology and Ophtha-Lab at St. Franziskus Hospital, Muenster, Germany.
| | | | - Michael Möller
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
| | - Dirk Bauer
- Department of Ophthalmology and Ophtha-Lab at St. Franziskus Hospital, Muenster, Germany
| | - Lena Wildschütz
- Department of Ophthalmology and Ophtha-Lab at St. Franziskus Hospital, Muenster, Germany
| | | | - Michael R R Böhm
- Department of Ophthalmology, Clinic for Diseases of the Anterior Segments of the Eyes, Essen University Hospital, Essen, Germany; Institute for Experimental Ophthalmology, University of Muenster, Germany
| | - Martin Busch
- Department of Ophthalmology and Ophtha-Lab at St. Franziskus Hospital, Muenster, Germany
| | - Karin Loser
- Department of Dermatology, University of Muenster, Germany
| | - Solon Thanos
- Institute for Experimental Ophthalmology, University of Muenster, Germany
| | - Robert Gurny
- Apidel SA, Geneva, Switzerland; School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Geneva, Switzerland
| | - Arnd Heiligenhaus
- Department of Ophthalmology and Ophtha-Lab at St. Franziskus Hospital, Muenster, Germany; University of Duisburg-Essen, Essen, Germany
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19
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Santos E, Gabriel D, Braga A, Duarte S, Martins Silva A, Matos I, Freijo M, Martins J, Nadais G, Silveira F, Sousa F, Fraga C, Santos Silva R, Lopes C, Gonçalves G, Pinto C, Sousa Braga J, Leite M. MuSK myasthenia gravis and pregnancy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Courthion H, Mugnier T, Rousseaux C, Möller M, Gurny R, Gabriel D. Self-assembling polymeric nanocarriers to target inflammatory lesions in ulcerative colitis. J Control Release 2017; 275:32-39. [PMID: 28774843 DOI: 10.1016/j.jconrel.2017.07.044] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 01/10/2017] [Revised: 07/28/2017] [Accepted: 07/30/2017] [Indexed: 02/07/2023]
Abstract
We have developed a self-assembling polymeric nanocarrier to deliver the potent immunosuppressive drug Cyclosporine A (CsA) to inflammatory lesions in ulcerative colitis (UC) patients. Our nanocarrier has a high drug loading capacity and efficiently targets its CsA payload to the diseased tissue after local administration. Tissue drug levels were several orders of magnitude higher in animals suffering from a trinitrobenzene-sulfonic acid (TNBS) - induced colitis, compared to healthy control animals; no drug was detectable in the plasma, underlining the localized delivery strategy. An efficient reduction in inflammation score was obtained with a CsA dose of 1mg/mL. Therapeutic efficacy was comparable to 5-aminosalicylic acid (5-ASA), the positive control treatment in the TNBS-induced colitis model. Repetitive treatment of healthy animals with CsA nanocarriers for seven days was well tolerated with no alterations in colon histology.
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Affiliation(s)
| | | | - Christel Rousseaux
- Intestinal Biotech Development, Faculté de Médicine - Pole Recherche Amphi JK, Bd du Pr Jules Leclercq, 59045 Lille, France.
| | - Michael Möller
- Apidel SA, 29 Quai du Mont Blanc, 1201 Geneva, Switzerland
| | - Robert Gurny
- Apidel SA, 29 Quai du Mont Blanc, 1201 Geneva, Switzerland.
| | - Doris Gabriel
- Apidel SA, 29 Quai du Mont Blanc, 1201 Geneva, Switzerland.
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21
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Colón J, Ponsá S, Álvarez C, Vinot M, Lafuente FJ, Gabriel D, Sánchez A. Analysis of MSW full-scale facilities based on anaerobic digestion and/or composting using respiration indices as performance indicators. Bioresour Technol 2017; 236:87-96. [PMID: 28390281 DOI: 10.1016/j.biortech.2017.03.172] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/22/2017] [Accepted: 03/28/2017] [Indexed: 06/07/2023]
Abstract
The Landfill Directive (1999/31/EC) forces European States to reduce the amount of biodegradable municipal waste landfilled to 35% of 1995 levels. Mechanical-Biological Treatment (MBT) plants are the main alternative to waste incineration and landfilling. In this work, the waste treatment efficiency of six full-scale MBT facilities has been analysed using respiration indices (Dynamic Respiration Index and Cumulative Oxygen Consumption) to monitor plant performance. MBTs relying on anaerobic digestion plus composting achieved a high grade of stability on final compost (0.24±0.09mgO2g-1DMh-1 and 20±9mgO2g-1DM for dynamic respiration and cumulative consumption, respectively). On the contrary, MBTs relying only on composting showed a poor performance (1.3±0.2mgO2g-1DMh-1 and 104±18mgO2g-1DM for dynamic respiration and cumulative consumption, respectively). These results highlight the usefulness of respirometric balances to assess the performance of MBT full-scale plants.
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Affiliation(s)
- J Colón
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - S Ponsá
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - C Álvarez
- R+D+i Department, URBASER S.A., 28031 Madrid, Spain
| | - M Vinot
- R+D+i Department, URBASER S.A., 28031 Madrid, Spain
| | - F J Lafuente
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - D Gabriel
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
| | - A Sánchez
- Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain.
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22
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Gabriel D, Mugnier T, Courthion H, Kranidioti K, Karagianni N, Denis MC, Lapteva M, Kalia Y, Möller M, Gurny R. Improved topical delivery of tacrolimus: A novel composite hydrogel formulation for the treatment of psoriasis. J Control Release 2016; 242:16-24. [DOI: 10.1016/j.jconrel.2016.09.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 08/30/2016] [Accepted: 09/08/2016] [Indexed: 01/05/2023]
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23
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Henriques J, Gabriel D, Grigoryeva L, Haffen E, Moulin T, Aubry R, Pazart L, Ortega JP. Protocol Design Challenges in the Detection of Awareness in Aware Subjects Using EEG Signals. Clin EEG Neurosci 2016; 47:266-275. [PMID: 25488924 DOI: 10.1177/1550059414560397] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 10/27/2014] [Indexed: 11/15/2022]
Abstract
Recent studies have evidenced serious difficulties in detecting covert awareness with electroencephalography-based techniques both in unresponsive patients and in healthy control subjects. This work reproduces the protocol design in two recent mental imagery studies with a larger group comprising 20 healthy volunteers. The main goal is assessing if modifications in the signal extraction techniques, training-testing/cross-validation routines, and hypotheses evoked in the statistical analysis, can provide solutions to the serious difficulties documented in the literature. The lack of robustness in the results advises for further search of alternative protocols more suitable for machine learning classification and of better performing signal treatment techniques. Specific recommendations are made using the findings in this work.
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Affiliation(s)
- J Henriques
- Laboratoire de Mathématiques de Besançon, Besançon, France.,Cegos Deployment, Besançon, France
| | - D Gabriel
- INSERM CIC 1431, Centre d'Investigation Clinique, CHU de Besançon, France.,EA 481 Laboratoire de Neurosciences de Besançon, Besançon, France
| | - L Grigoryeva
- Laboratoire de Mathématiques de Besançon, Besançon, France
| | - E Haffen
- INSERM CIC 1431, Centre d'Investigation Clinique, CHU de Besançon, France.,EA 481 Laboratoire de Neurosciences de Besançon, Besançon, France.,Service de Psychiatrie de l'adulte, CHU de Besançon, France.,Fondation FondaMental, Créteil, France
| | - T Moulin
- INSERM CIC 1431, Centre d'Investigation Clinique, CHU de Besançon, France.,EA 481 Laboratoire de Neurosciences de Besançon, Besançon, France.,Département de Recherche en imagerie fonctionnelle, CHU de Besançon, France.,Service de neurologie, CHU de Besançon, France
| | - R Aubry
- INSERM CIC 1431, Centre d'Investigation Clinique, CHU de Besançon, France.,Espace Ethique Bourgogne/Franche-Comté, CHU de Besançon/Dijon, France.,Département douleur soins palliatifs, CHU de Besançon, France
| | - L Pazart
- INSERM CIC 1431, Centre d'Investigation Clinique, CHU de Besançon, France
| | - J-P Ortega
- Laboratoire de Mathématiques de Besançon, Besançon, France .,Centre National de la Recherche Scientifique (CNRS), Besançon, France
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Comte A, Gabriel D, Pazart L, Magnin E, Cretin E, Haffen E, Moulin T, Aubry R. On the difficulty to communicate with fMRI-based protocols used to identify covert awareness. Neuroscience 2015; 300:448-59. [DOI: 10.1016/j.neuroscience.2015.05.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/20/2015] [Accepted: 05/24/2015] [Indexed: 10/23/2022]
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Gabriel D, Henriques J, Comte A, Grigoryeva L, Ortega JP, Cretin E, Brunotte G, Haffen E, Moulin T, Aubry R, Pazart L. Substitute or complement? Defining the relative place of EEG and fMRI in the detection of voluntary brain reactions. Neuroscience 2015; 290:435-44. [DOI: 10.1016/j.neuroscience.2015.01.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 01/17/2015] [Accepted: 01/22/2015] [Indexed: 10/24/2022]
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Monteiro IP, Gabriel D, Timko BP, Hashimoto M, Karajanagi S, Tong R, Marques AP, Reis RL, Kohane DS. A two-component pre-seeded dermal-epidermal scaffold. Acta Biomater 2014; 10:4928-4938. [PMID: 25192821 DOI: 10.1016/j.actbio.2014.08.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 08/18/2014] [Accepted: 08/25/2014] [Indexed: 12/14/2022]
Abstract
We have developed a bilayered dermal-epidermal scaffold for application in the treatment of full-thickness skin defects. The dermal component gels in situ and adapts to the lesion shape, delivering human dermal fibroblasts in a matrix of fibrin and cross-linked hyaluronic acid modified with a cell adhesion-promoting peptide. Fibroblasts were able to form a tridimensional matrix due to material features such as tailored mechanical properties, presence of protease-degradable elements and cell-binding ligands. The epidermal component is a robust membrane containing cross-linked hyaluronic acid and poly-l-lysine, on which keratinocytes were able to attach and to form a monolayer. Amine-aldehyde bonding at the interface between the two components allows the formation of a tightly bound composite scaffold. Both parts of the scaffold were designed to provide cell-type-specific cues to allow for cell proliferation and form a construct that mimics the skin environment.
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Affiliation(s)
- I P Monteiro
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, 4806-909 Taipas, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory University of Minho, Braga/Guimarães, Portugal
| | - D Gabriel
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - B P Timko
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - M Hashimoto
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - S Karajanagi
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA 02114, USA
| | - R Tong
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - A P Marques
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, 4806-909 Taipas, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory University of Minho, Braga/Guimarães, Portugal
| | - R L Reis
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, 4806-909 Taipas, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory University of Minho, Braga/Guimarães, Portugal
| | - D S Kohane
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
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27
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Gabriel D, Cohen-Karni T, Huang D, Chiang HH, Kohane DS. Photoactive electrospun fibers for inducing cell death. Adv Healthc Mater 2014; 3:494-9. [PMID: 24574265 DOI: 10.1002/adhm.201300318] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 07/31/2013] [Revised: 09/16/2013] [Indexed: 11/07/2022]
Abstract
A photoactive electrospun material producing reactive oxygen species (ROS) upon light irradiation is reported. The phototoxicity of the generated ROS is spatially restricted to the fiber-tissue interface by conjugation of the photosensitizer to a macromolecule. Photo-triggered ROS is produced on demand and repeatedly. It induces death of mammalian cells growing on the material surface with high spatial resolution.
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Affiliation(s)
- Doris Gabriel
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine; Children's Hospital Boston, Harvard Medical School; 300 Longwood Avenue Boston MA 02115 USA
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Tzahi Cohen-Karni
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine; Children's Hospital Boston, Harvard Medical School; 300 Longwood Avenue Boston MA 02115 USA
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - David Huang
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Homer H. Chiang
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine; Children's Hospital Boston, Harvard Medical School; 300 Longwood Avenue Boston MA 02115 USA
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Daniel S. Kohane
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine; Children's Hospital Boston, Harvard Medical School; 300 Longwood Avenue Boston MA 02115 USA
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
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He BJ, Nolte G, Nagata K, Takano D, Yamazaki T, Fujimaki Y, Maeda T, Satoh Y, Heckers S, George MS, Lopes da Silva F, de Munck JC, Van Houdt PJ, Verdaasdonk RM, Ossenblok P, Mullinger K, Bowtell R, Bagshaw AP, Keeser D, Karch S, Segmiller F, Hantschk I, Berman A, Padberg F, Pogarell O, Scharnowski F, Karch S, Hümmer S, Keeser D, Paolini M, Kirsch V, Koller G, Rauchmann B, Kupka M, Blautzik J, Pogarell O, Razavi N, Jann K, Koenig T, Kottlow M, Hauf M, Strik W, Dierks T, Gotman J, Vulliemoz S, Lu Y, Zhang H, Yang L, Worrell G, He B, Gruber O, Piguet C, Hubl D, Homan P, Kindler J, Dierks T, Kim K, Steinhoff U, Wakai R, Koenig T, Kottlow M, Melie-García L, Mucci A, Volpe U, Prinster A, Salvatore M, Galderisi S, Linden DEJ, Brandeis D, Schroeder CE, Kayser C, Panzeri S, Kleinschmidt A, Ritter P, Walther S, Haueisen J, Lau S, Flemming L, Sonntag H, Maess B, Knösche TR, Lanfer B, Dannhauer M, Wolters CH, Stenroos M, Haueisen J, Wolters C, Aydin U, Lanfer B, Lew S, Lucka F, Ruthotto L, Vorwerk J, Wagner S, Ramon C, Guan C, Ang KK, Chua SG, Kuah WK, Phua KS, Chew E, Zhou H, Chuang KH, Ang BT, Wang C, Zhang H, Yang H, Chin ZY, Yu H, Pan Y, Collins L, Mainsah B, Colwell K, Morton K, Ryan D, Sellers E, Caves K, Throckmorton S, Kübler A, Holz EM, Zickler C, Sellers E, Ryan D, Brown K, Colwell K, Mainsah B, Caves K, Throckmorton S, Collins L, Wennberg R, Ahlfors SP, Grova C, Chowdhury R, Hedrich T, Heers M, Zelmann R, Hall JA, Lina JM, Kobayashi E, Oostendorp T, van Dam P, Oosterhof P, Linnenbank A, Coronel R, van Dessel P, de Bakker J, Rossion B, Jacques C, Witthoft N, Weiner KS, Foster BL, Miller KJ, Hermes D, Parvizi J, Grill-Spector K, Recanzone GH, Murray MM, Haynes JD, Richiardi J, Greicius M, De Lucia M, Müller KR, Formisano E, Smieskova R, Schmidt A, Bendfeldt K, Walter A, Riecher-Rössler A, Borgwardt S, Fusar-Poli P, Eliez S, Schmidt A, Sekihara K, Nagarajan SS, Schoffelen JM, Guggisberg AG, Nolte G, Balazs S, Kermanshahi K, Kiesenhofer W, Binder H, Rattay F, Antal A, Chaieb L, Paulus W, Bodis-Wollner I, Maurer K, Fein G, Camchong J, Johnstone J, Cardenas-Nicolson V, Fiederer LDJ, Lucka F, Yang S, Vorwerk J, Dümpelmann M, Cosandier-Rimélé D, Schulze-Bonhage A, Aertsen A, Speck O, Wolters CH, Ball T, Fuchs M, Wagner M, Kastner J, Tech R, Dinh C, Haueisen J, Baumgarten D, Hämäläinen MS, Lau S, Vogrin SJ, D'Souza W, Haueisen J, Cook MJ, Custo A, Van De Ville D, Vulliemoz S, Grouiller F, Michel CM, Malmivuo J, Aydin U, Vorwerk J, Küpper P, Heers M, Kugel H, Wellmer J, Kellinghaus C, Scherg M, Rampp S, Wolters C, Storti SF, Boscolo Galazzo I, Del Felice A, Pizzini FB, Arcaro C, Formaggio E, Mai R, Manganotti P, Koessler L, Vignal J, Cecchin T, Colnat-Coulbois S, Vespignani H, Ramantani G, Maillard L, Rektor I, Kuba R, Brázdil M, Chrastina J, Rektorova I, van Mierlo P, Carrette E, Strobbe G, Montes-Restrepo V, Vonck K, Vandenberghe S, Ahmed B, Brodely C, Carlson C, Kuzniecky R, Devinsky O, French J, Thesen T, Bénis D, David O, Lachaux JP, Seigneuret E, Krack P, Fraix V, Chabardès S, Bastin J, Jann K, Gee D, Kilroy E, Cannon T, Wang DJ, Hale JR, Mayhew SD, Przezdzik I, Arvanitis TN, Bagshaw AP, Plomp G, Quairiaux C, Astolfi L, Michel CM, Mayhew SD, Mullinger KJ, Bagshaw AP, Bowtell R, Francis ST, Schouten AC, Campfens SF, van der Kooij H, Koles Z, Lind J, Flor-Henry P, Wirth M, Haase CM, Villeneuve S, Vogel J, Jagust WJ, Kambeitz-Ilankovic L, Simon-Vermot L, Gesierich B, Duering M, Ewers M, Rektorova I, Krajcovicova L, Marecek R, Mikl M, Bracht T, Horn H, Strik W, Federspiel A, Schnell S, Höfle O, Stegmayer K, Wiest R, Dierks T, Müller TJ, Walther S, Surmeli T, Ertem A, Eralp E, Kos IH, Skrandies W, Flüggen S, Klein A, Britz J, Díaz Hernàndez L, Ro T, Michel CM, Lenartowicz A, Lau E, Rodriguez C, Cohen MS, Loo SK, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, La Porta P, Verardo AR, Niolu C, Fernandez I, Siracusano A, Flor-Henry P, Lind J, Koles Z, Bollmann S, Ghisleni C, O'Gorman R, Poil SS, Klaver P, Michels L, Martin E, Ball J, Eich-Höchli D, Brandeis D, Salisbury DF, Murphy TK, Butera CD, Mathalon DH, Fryer SL, Kiehl KA, Calhoun VC, Pearlson GD, Roach BJ, Ford JM, McGlashan TH, Woods SW, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Gonzalez Andino S, Grave de Peralta Menendez R, Grave de Peralta Menendez R, Sanchez Vives M, Rebollo B, Gonzalez Andino S, Frølich L, Andersen TS, Mørup M, Belfiore P, Gargiulo P, Ramon C, Vanhatalo S, Cho JH, Vorwerk J, Wolters CH, Knösche TR, Watanabe T, Kawabata Y, Ukegawa D, Kawabata S, Adachi Y, Sekihara K, Sekihara K, Nagarajan SS, Wagner S, Aydin U, Vorwerk J, Herrmann C, Burger M, Wolters C, Lucka F, Aydin U, Vorwerk J, Burger M, Wolters C, Bauer M, Trahms L, Sander T, Faber PL, Lehmann D, Gianotti LRR, Pascual-Marqui RD, Milz P, Kochi K, Kaneko S, Yamashita S, Yana K, Kalogianni K, Vardy AN, Schouten AC, van der Helm FCT, Sorrentino A, Luria G, Aramini R, Hunold A, Funke M, Eichardt R, Haueisen J, Gómez-Aguilar F, Vázquez-Olvera S, Cordova-Fraga T, Castro-López J, Hernández-Gonzalez MA, Solorio-Meza S, Sosa-Aquino M, Bernal-Alvarado JJ, Vargas-Luna M, Vorwerk J, Magyari L, Ludewig J, Oostenveld R, Wolters CH, Vorwerk J, Engwer C, Ludewig J, Wolters C, Sato K, Nishibe T, Furuya M, Yamashiro K, Yana K, Ono T, Puthanmadam Subramaniyam N, Hyttinen J, Lau S, Güllmar D, Flemming L, Haueisen J, Sonntag H, Vorwerk J, Wolters CH, Grasedyck L, Haueisen J, Maeß B, Freitag S, Graichen U, Fiedler P, Strohmeier D, Haueisen J, Stenroos M, Hauk O, Grigutsch M, Felber M, Maess B, Herrmann B, Strobbe G, van Mierlo P, Vandenberghe S, Strobbe G, Cárdenas-Peña D, Montes-Restrepo V, van Mierlo P, Castellanos-Dominguez G, Vandenberghe S, Lanfer B, Paul-Jordanov I, Scherg M, Wolters CH, Ito Y, Sato D, Kamada K, Kobayashi T, Dalal SS, Rampp S, Willomitzer F, Arold O, Fouladi-Movahed S, Häusler G, Stefan H, Ettl S, Zhang S, Zhang Y, Li H, Kong X, Montes-Restrepo V, Strobbe G, van Mierlo P, Vandenberghe S, Wong DDE, Bidet-Caulet A, Knight RT, Crone NE, Dalal SS, Birot G, Spinelli L, Vulliémoz S, Seeck M, Michel CM, Emory H, Wells C, Mizrahi N, Vogrin SJ, Lau S, Cook MJ, Karahanoglu FI, Grouiller F, Caballero-Gaudes C, Seeck M, Vulliemoz S, Van De Ville D, Spinelli L, Megevand P, Genetti M, Schaller K, Michel C, Vulliemoz S, Seeck M, Genetti M, Tyrand R, Grouiller F, Vulliemoz S, Spinelli L, Seeck M, Schaller K, Michel CM, Grouiller F, Heinzer S, Delattre B, Lazeyras F, Spinelli L, Pittau F, Seeck M, Ratib O, Vargas M, Garibotto V, Vulliemoz S, Vogrin SJ, Bailey CA, Kean M, Warren AE, Davidson A, Seal M, Harvey AS, Archer JS, Papadopoulou M, Leite M, van Mierlo P, Vonck K, Boon P, Friston K, Marinazzo D, Ramon C, Holmes M, Koessler L, Rikir E, Gavaret M, Bartolomei F, Vignal JP, Vespignani H, Maillard L, Centeno M, Perani S, Pier K, Lemieux L, Clayden J, Clark C, Pressler R, Cross H, Carmichael DW, Spring A, Bessemer R, Pittman D, Aghakhani Y, Federico P, Pittau F, Grouiller F, Vulliémoz S, Gotman J, Badier JM, Bénar CG, Bartolomei F, Cruto C, Chauvel P, Gavaret M, Brodbeck V, van Leeuwen T, Tagliazzuchi E, Melloni L, Laufs H, Griskova-Bulanova I, Dapsys K, Klein C, Hänggi J, Jäncke L, Ehinger BV, Fischer P, Gert AL, Kaufhold L, Weber F, Marchante Fernandez M, Pipa G, König P, Sekihara K, Hiyama E, Koga R, Iannilli E, Michel CM, Bartmuss AL, Gupta N, Hummel T, Boecker R, Holz N, Buchmann AF, Blomeyer D, Plichta MM, Wolf I, Baumeister S, Meyer-Lindenberg A, Banaschewski T, Brandeis D, Laucht M, Natahara S, Ueno M, Kobayashi T, Kottlow M, Bänninger A, Koenig T, Schwab S, Koenig T, Federspiel A, Dierks T, Jann K, Natsukawa H, Kobayashi T, Tüshaus L, Koenig T, Kottlow M, Achermann P, Wilson RS, Mayhew SD, Assecondi S, Arvanitis TN, Bagshaw AP, Darque A, Rihs TA, Grouiller F, Lazeyras F, Ha-Vinh Leuchter R, Caballero C, Michel CM, Hüppi PS, Hauser TU, Hunt LT, Iannaccone R, Stämpfli P, Brandeis D, Dolan RJ, Walitza S, Brem S, Graichen U, Eichardt R, Fiedler P, Strohmeier D, Freitag S, Zanow F, Haueisen J, Lordier L, Grouiller F, Van de Ville D, Sancho Rossignol A, Cordero I, Lazeyras F, Ansermet F, Hüppi P, Schläpfer A, Rubia K, Brandeis D, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Giannoudas I, Verardo AR, La Porta P, Niolu C, Fernandez I, Siracusano A, Tamura K, Karube C, Mizuba T, Matsufuji M, Takashima S, Iramina K, Assecondi S, Ostwald D, Bagshaw AP, Marecek R, Brazdil M, Lamos M, Slavícek T, Marecek R, Jan J, Meier NM, Perrig W, Koenig T, Minami T, Noritake Y, Nakauchi S, Azuma K, Minami T, Nakauchi S, Rodriguez C, Lenartowicz A, Cohen MS, Rodriguez C, Lenartowicz A, Cohen MS, Iramina K, Kinoshita H, Tamura K, Karube C, Kaneko M, Ide J, Noguchi Y, Cohen MS, Douglas PK, Rodriguez CM, Xia HJ, Zimmerman EM, Konopka CJ, Epstein PS, Konopka LM, Giezendanner S, Fisler M, Soravia L, Andreotti J, Wiest R, Dierks T, Federspiel A, Razavi N, Federspiel A, Dierks T, Hauf M, Jann K, Kamada K, Sato D, Ito Y, Okano K, Mizutani N, Kobayashi T, Thelen A, Murray M, Pastena L, Formaggio E, Storti SF, Faralli F, Melucci M, Gagliardi R, Ricciardi L, Ruffino G, Coito A, Macku P, Tyrand R, Astolfi L, He B, Wiest R, Seeck M, Michel C, Plomp G, Vulliemoz S, Fischmeister FPS, Glaser J, Schöpf V, Bauer H, Beisteiner R, Deligianni F, Centeno M, Carmichael DW, Clayden J, Mingoia G, Langbein K, Dietzek M, Wagner G, Smesny S, Scherpiet S, Maitra R, Gaser C, Sauer H, Nenadic I, Dürschmid S, Zaehle T, Pannek H, Chang HF, Voges J, Rieger J, Knight RT, Heinze HJ, Hinrichs H, Tsatsishvili V, Cong F, Puoliväli T, Alluri V, Toiviainen P, Nandi AK, Brattico E, Ristaniemi T, Grieder M, Crinelli RM, Jann K, Federspiel A, Wirth M, Koenig T, Stein M, Wahlund LO, Dierks T, Atsumori H, Yamaguchi R, Okano Y, Sato H, Funane T, Sakamoto K, Kiguchi M, Tränkner A, Schindler S, Schmidt F, Strauß M, Trampel R, Hegerl U, Turner R, Geyer S, Schönknecht P, Kebets V, van Assche M, Goldstein R, van der Meulen M, Vuilleumier P, Richiardi J, Van De Ville D, Assal F, Wozniak-Kwasniewska A, Szekely D, Harquel S, Bougerol T, David O, Bracht T, Jones DK, Horn H, Müller TJ, Walther S, Sos P, Klirova M, Novak T, Brunovsky M, Horacek J, Bares M, Hoschl C C, Fellhauer I, Zöllner FG, Schröder J, Kong L, Essig M, Schad LR, Arrubla J, Neuner I, Hahn D, Boers F, Shah NJ, Neuner I, Arrubla J, Hahn D, Boers F, Jon Shah N, Suriya Prakash M, Sharma R, Kawaguchi H, Kobayashi T, Fiedler P, Griebel S, Biller S, Fonseca C, Vaz F, Zentner L, Zanow F, Haueisen J, Rochas V, Rihs T, Thut G, Rosenberg N, Landis T, Michel C, Moliadze V, Schmanke T, Lyzhko E, Bassüner S, Freitag C, Siniatchkin M, Thézé R, Guggisberg AG, Nahum L, Schnider A, Meier L, Friedrich H, Jann K, Landis B, Wiest R, Federspiel A, Strik W, Dierks T, Witte M, Kober SE, Neuper C, Wood G, König R, Matysiak A, Kordecki W, Sieluzycki C, Zacharias N, Heil P, Wyss C, Boers F, Arrubla J, Dammers J, Kawohl W, Neuner I, Shah NJ, Braboszcz C, Cahn RB, Levy J, Fernandez M, Delorme A, Rosas-Martinez L, Milne E, Zheng Y, Urakami Y, Kawamura K, Washizawa Y, Hiyoshi K, Cichocki A, Giroud N, Dellwo V, Meyer M, Rufener KS, Liem F, Dellwo V, Meyer M, Jones-Rounds JD, Raizada R, Staljanssens W, Strobbe G, van Mierlo P, Van Holen R, Vandenberghe S, Pefkou M, Becker R, Michel C, Hervais-Adelman A, He W, Brock J, Johnson B, Ohla K, Hitz K, Heekeren K, Obermann C, Huber T, Juckel G, Kawohl W, Gabriel D, Comte A, Henriques J, Magnin E, Grigoryeva L, Ortega JP, Haffen E, Moulin T, Pazart L, Aubry R, Kukleta M, Baris Turak B, Louvel J, Crespo-Garcia M, Cantero JL, Atienza M, Connell S, Kilborn K, Damborská A, Brázdil M, Rektor I, Kukleta M, Koberda JL, Bienkiewicz A, Koberda I, Koberda P, Moses A, Tomescu M, Rihs T, Britz J, Custo A, Grouiller F, Schneider M, Debbané M, Eliez S, Michel C, Wang GY, Kydd R, Wouldes TA, Jensen M, Russell BR, Dissanayaka N, Au T, Angwin A, O'Sullivan J, Byrne G, Silburn P, Marsh R, Mellic G, Copland D, Bänninger A, Kottlow M, Díaz Hernàndez L, Koenig T, Díaz Hernàndez L, Bänninger A, Koenig T, Hauser TU, Iannaccone R, Mathys C, Ball J, Drechsler R, Brandeis D, Walitza S, Brem S, Boeijinga PH, Pang EW, Valica T, Macdonald MJ, Oh A, Lerch JP, Anagnostou E, Di Lorenzo G, Pagani M, Monaco L, Daverio A, Verardo AR, Giannoudas I, La Porta P, Niolu C, Fernandez I, Siracusano A, Shimada T, Matsuda Y, Monkawa A, Monkawa T, Hashimoto R, Watanabe K, Kawasaki Y, Matsuda Y, Shimada T, Monkawa T, Monkawa A, Watanabe K, Kawasaki Y, Stegmayer K, Horn H, Federspiel A, Razavi N, Bracht T, Laimböck K, Strik W, Dierks T, Wiest R, Müller TJ, Walther S, Koorenhof LJ, Swithenby SJ, Martins-Mourao A, Rihs TA, Tomescu M, Song KW, Custo A, Knebel JF, Murray M, Eliez S, Michel CM, Volpe U, Merlotti E, Vignapiano A, Montefusco V, Plescia GM, Gallo O, Romano P, Mucci A, Galderisi S, Laimboeck K, Jann K, Walther S, Federspiel A, Wiest R, Strik W, Horn H. Abstracts of Presentations at the International Conference on Basic and Clinical Multimodal Imaging (BaCI), a Joint Conference of the International Society for Neuroimaging in Psychiatry (ISNIP), the International Society for Functional Source Imaging (ISFSI), the International Society for Bioelectromagnetism (ISBEM), the International Society for Brain Electromagnetic Topography (ISBET), and the EEG and Clinical Neuroscience Society (ECNS), in Geneva, Switzerland, September 5-8, 2013. Clin EEG Neurosci 2013; 44:1550059413507209. [PMID: 24368763 DOI: 10.1177/1550059413507209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- B J He
- National Institutes of Health, Bethesda, MD, USA
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Gabriel D, Monteiro IP, Huang D, Langer R, Kohane DS. A photo-triggered layered surface coating producing reactive oxygen species. Biomaterials 2013; 34:9763-9. [PMID: 24074838 DOI: 10.1016/j.biomaterials.2013.09.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 07/21/2013] [Accepted: 09/05/2013] [Indexed: 01/15/2023]
Abstract
We report a photoactive surface coating which produces cytotoxic reactive oxygen species (ROS) upon irradiation with near infrared (NIR) light. The coating is assembled layer-by-layer, and consists of cross-linked hyaluronic acid (HA) and poly-l-lysine (PLL) modified with the photoactive molecule pheophorbide a. Pheophorbide a loading can be fine-tuned by varying the number of bilayers, yielding stable materials with the capacity to generate repeated and/or prolonged light-triggered ROS release. Light irradiation of the photoactive surface coatings provides a versatile platform for the spatiotemporal control of events at the material-tissue interface, such as bacterial colonization, platelet adhesion, and mammalian cell attachment.
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Affiliation(s)
- Doris Gabriel
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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Abstract
INTRODUCTION Growth factors and other bioactive molecules play a crucial role in the creation of functional engineered tissues from dissociated cells. AREAS COVERED This review discusses the delivery of bioactive molecules - particularly growth factors - to affect cellular function in the context of tissue engineering. We discuss the primary biological themes that are addressed by delivering bioactives, the types of molecules that are to be delivered, the major materials used in producing scaffolds and/or drug delivery systems, and the principal drug delivery strategies. EXPERT OPINION Drug delivery systems have allowed the sustained release of bioactive molecules to engineered tissues, with marked effects on tissue function. Sophisticated drug delivery techniques will allow precise recapitulation of developmental milestones by providing temporally distinct patterns of release of multiple bioactives. High-resolution patterning techniques will allow tissue constructs to be designed with precisely defined areas where bioactives can act. New biological discoveries, just as the development of small molecules with potent effects on cell differentiation, will likely have a marked impact on the field.
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Affiliation(s)
- Doris Gabriel
- Children's Hospital Boston, Harvard Medical School, Division of Critical Care Medicine, Department of Anesthesiology, Laboratory for Biomaterials and Drug Delivery, 300 Longwood Avenue, Boston, MA 02115, USA
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Hernández J, Lafuente J, Prado OJ, Gabriel D. Startup and long-term performance of biotrickling filters packed with polyurethane foam and poplar wood chips treating a mixture of ethylmercaptan, H2S, and NH3. J Air Waste Manag Assoc 2013; 63:462-471. [PMID: 23687731 DOI: 10.1080/10962247.2013.763305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
UNLABELLED Treatment of a mixture of NH3, H2S, and ethylmercaptan (EM) was investigated for more than 15 months in two biotrickling filters packed with poplar wood chips and polyurethane foam. Inlet loads ranging from 5 to 10 g N-NH3 m-3 hr-1, from 5 to 16 g S-H2S m-3 hr-1, and from 0 to 5 g EM m-3 hr-1 were applied. During startup, the biotrickling filter packed with polyurethane foam was re-inoculated due to reduced biomass retention as well as a stronger effect of nitrogen compounds inhibition compared with the biotrickling filter packed with poplar wood. Accurate pH control between 7 and 7.5 favored pollutants abatement. In the long run, complete NH3 removal in the gas phase was achieved in both reactors, while H2S removal efficiencies exceeded 90%. EM abatement was significantly different in both reactors. A systematically lower elimination capacity was found in the polyurethane foam bioreactor. N fractions in the liquid phase proved that high nitrification rates were reached throughout steady-state operation in both bioreactors. CO2 production showed the extent of the organic packing material degradation, which allowed estimating its service lifetime in around 2 years. In the long run, the bioreactor packed with the organic packing material had a lower stability. However, an economic analysis indicated that poplar wood chips are a competitive alternative to inorganic packing materials in biotrickling filters. IMPLICATIONS We provide new insights in the use of organic packing materials in biotrickling filters for the treatment of H2S, NH3, and mercaptans and compare them with polyurethane foam, a packing commonly used in biotrickling filters. We found interesting features related with the startup of the reactors and parameterized both the performance under steady-state conditions and the influence of the gas contact time. We provide relevant conclusions in the profitability of organic packing materials under a biotrickling filter configuration, which is infrequent but proven reliable from our research results. The report is useful to designers and users of this technology.
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Affiliation(s)
- J Hernández
- Department of Chemical Engineering, Universitat Autònoma de Barcelona, Barcelona, Spain
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Rodriguez G, Dorado AD, Bonsfills A, Gabriel D, Gamisans X. Optimization of Oxygen Transfer through Membrane Diffusers for Biological Sweetening of Biogas. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Zuluaga MF, Sekkat N, Gabriel D, van den Bergh H, Lange N. Selective Photodetection and Photodynamic Therapy for Prostate Cancer through Targeting of Proteolytic Activity. Mol Cancer Ther 2012; 12:306-13. [DOI: 10.1158/1535-7163.mct-12-0780] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gabriel D, Gaudrain E, Lebrun-Guillaud G, Sheppard F, Tomescu IM, Schnider A. Do irrelevant sounds impair the maintenance of all characteristics of speech in memory? J Psycholinguist Res 2012; 41:475-486. [PMID: 22411591 DOI: 10.1007/s10936-012-9204-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Several studies have shown that maintaining in memory some attributes of speech, such as the content or pitch of an interlocutor's message, is markedly reduced in the presence of background sounds made of spectrotemporal variations. However, experimental paradigms showing this interference have only focused on one attribute of speech at a time, and thus differ from real-life situations in which several attributes have to be memorized and maintained simultaneously. It is possible that the interference is even greater in such a case and can occur for a broader range of background sounds. We developed a paradigm in which participants had to maintain the content, pitch and speaker size of auditorily presented speech information and used various auditory distractors to generate interference. We found that only distractors with spectrotemporal variations impaired the detection, which shows that similar interference mechanisms occur whether there are one or more speech attributes to maintain in memory. A high percentage of false alarms was observed with these distractors, suggesting that spectrotemporal variations not only weaken but also modify the information maintained in memory. Lastly, we found that participants were unaware of the interference. These results are similar to those observed in the visual modality.
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Affiliation(s)
- D Gabriel
- Division of Neurorehabilitation, Department of Clinical Neurosciences, Geneva University Hospitals, 1211 Geneva 14, Switzerland.
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Abstract
Prodrugs combining macromolecular delivery systems with site-selective drug release represent a powerful strategy to increase selectivity of anticancer agents. We have adapted this strategy to develop new polymeric photosensitizer prodrugs (PPP) sensitive to urokinase-like plasminogen activator (uPA). In these compounds (to be referred to as uPA-PPPs) multiple copies of pheophorbide a are attached to a polymeric carrier via peptide linkers that can be cleaved by uPA, a protease overexpressed in prostate cancer (PCa). uPA-PPPs are non-phototoxic in their native state but become fluorescent and produce singlet oxygen after uPA-mediated activation. In the present work, we studied the influence of side-chain modifications, molecular weight, and overall charge on the photoactivity and pharmacokinetics of uPA-PPPs. An in vitro promising candidate with convertible phototoxicity was then further investigated in vivo. Systemic administration resulted in a selective accumulation and activation of the prodrug in luciferase transfected PC-3 xenografts, resulting in a 4-fold increase in fluorescence emission over time. Irradiation of fluorescent tumors induced immediate tumor cell eradication as shown by whole animal bioluminescence imaging. PDT with uPA-PPP could therefore provide a more selective treatment of localized PCa and reduce side effects associated with current radical treatments.
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Affiliation(s)
- Maria-Fernanda Zuluaga
- Department of Pharmaceutics and Biopharmaceutics, School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
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Walko C, Ivanova A, Whitley J, Rao K, Gabriel D, Serody J, Comeau T, Coghill J, Armistead P, Sarantopoulos S, Wood W, Shea T. Beneficial Effect of High-Dose Iv Busulfan (Bu) Delivered by Prolonged Continuous Infusion (CI) on Relapse Rate and Overall Survival (OS) in Matched Related and Unrelated Allogeneic Transplant Patients with Hematologic Malignancies. Biol Blood Marrow Transplant 2012. [DOI: 10.1016/j.bbmt.2011.12.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dorado AD, Lafuente J, Gabriel D, Gamisans X. Interaction between sorption and biodegradation in a biofilter packed with activated carbon. Water Sci Technol 2012; 66:1743-1750. [PMID: 22907460 DOI: 10.2166/wst.2012.384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The main objective of this study is to evaluate qualitatively and quantitatively the effect of starvation periods in the biodegradation capacity of microorganisms when the support media is a material with high sorption capacity. Pollutant sorption and biodegradation, which occur simultaneously in the biofilter, describe the overall behavior of the air treatment system during normal operation and during starvation periods. Results obtained in the present study demonstrate that sorption capacity of the material not only plays an important role during the start-up of operation, but it is also important during steady operation. Simultaneously, as biomass grows on the support, biodegradation becomes more decisive in the performance. It was found that zones of packing material with low moisture content are controlled by the sorption mechanism, at the expense of biodegradation, and they are essential as a pollutant reservoir during starvation periods. In the present study a significant decrease in the biodegradation capacity of microorganisms immobilized on activated carbon was not observed as a consequence of continuous load interruptions.
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Affiliation(s)
- A D Dorado
- Department of Mining Engineering and Natural Resources, Universitat Politècnica de Catalunya, Manresa, Spain
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Gabriel D, Zuluaga MF, van den Bergh H, Gurny R, Lange N. It is all about proteases: from drug delivery to in vivo imaging and photomedicine. Curr Med Chem 2011; 18:1785-805. [PMID: 21466472 DOI: 10.2174/092986711795496782] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2010] [Accepted: 03/24/2011] [Indexed: 11/22/2022]
Abstract
Clinical studies provide overwhelming evidence for the importance of proteolytic imbalance and the upregulation of diverse protease classes in diseases such as cancer and arthritis. While the complex nature of proteolytic networks has hampered the development of protease inhibitors for these indications, aberrant enzyme activity could be successfully exploited for the development of proteasesensitive drug delivery systems and fluorescent in vivo imaging agents. More recently, these concepts have also been translated into photomedical applications to develop dual modality prodrugs for the simultaneous treatment and imaging of disease. After an introductory overview of proteases and their role in cancer, we present and discuss different strategies to exploit upregulated protease activity for the development of drug delivery systems, fluorescent in vivo reporter probes, and photosensitizer-prodrugs with respect to their potential and limitations. The main approaches used for targeting proteases in all three areas can be roughly divided into peptide-based and macromolecular strategies. Both involve the use of a short, peptide-based protease substrate, which is either directly tagged to the therapeutic agent or dye/quencher pair, or alternatively, serves as a linker between the polymeric carrier and a functional unit. In the latter case, the pharmacokinetic properties of peptide-based protease-sensitive prodrugs and imaging probes can be further ameliorated by the passive targeting capacity of macromolecular drug delivery systems for neoplastic and inflammatory lesions.
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Affiliation(s)
- D Gabriel
- Section of Pharmaceutical Sciences, University of Lausanne, University of Geneva, Geneva, Switzerland
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Wahlen A, Nahum L, Gabriel D, Schnider A. Fake or Fantasy: Rapid Dissociation between Strategic Content Monitoring and Reality Filtering in Human Memory. Cereb Cortex 2011; 21:2589-98. [DOI: 10.1093/cercor/bhr049] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Gabriel D, Zuluaga MF, Lange N. On the cutting edge: protease-sensitive prodrugs for the delivery of photoactive compounds. Photochem Photobiol Sci 2011; 10:689-703. [DOI: 10.1039/c0pp00341g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Maestre JP, Rovira R, Alvarez-Hornos FJ, Fortuny M, Lafuente J, Gamisans X, Gabriel D. Bacterial community analysis of a gas-phase biotrickling filter for biogas mimics desulfurization through the rRNA approach. Chemosphere 2010; 80:872-880. [PMID: 20554311 DOI: 10.1016/j.chemosphere.2010.05.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 05/13/2010] [Accepted: 05/17/2010] [Indexed: 05/29/2023]
Abstract
The bacterial composition of a lab-scale biotrickling filter (BTF) treating high loads of H(2)S was investigated by the rRNA approach. Two 16S rRNA gene clone libraries were established 42 and 189 d after reactor startup, while fluorescent in-situ hybridization (FISH) with DNA probes was performed throughout 260d of reactor operation. Diversity, community structure and metamorphosis were studied from reactor startup to fully-established pseudo-steady state operation at near neutral pH and at an inlet H(2)S concentration of 2000 ppmv (load of 55.6g H(2)S m(-3)h(-1)). In addition, FISH was used for assessing the spatial distribution of sulfur-oxidizing bacteria (SOB) along the length of the reactor under pseudo-steady state operation. A major shift in the diversity of the community was observed with the operating time, from a well-diverse community at startup to pseudo-steady state operation with a majority of retrieved sequences affiliated to SOB of the sulfur cycle including Thiothrix spp., Thiobacillus spp., and Sulfurimonas denitrificans. Although aerobic species were predominant along the BTF, a vertical stratification was encountered, in which facultative anaerobes had a major relative abundance in the inlet part of the BTF, where the sulfide to oxygen ratio was higher. The observed changes were related to the trophic properties of the community, the DO concentration, the accumulation of elemental sulfur and the operation at neutral pH.
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Affiliation(s)
- Juan P Maestre
- Department of Chemical Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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Dorado AD, Lafuente FJ, Gabriel D, Gamisans X. A comparative study based on physical characteristics of suitable packing materials in biofiltration. Environ Technol 2010; 31:193-204. [PMID: 20391804 DOI: 10.1080/09593330903426687] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In the present work, 10 packing materials commonly used as support media in biofiltration are analysed and compared to evaluate their suitability according to physical characteristics. The nature of the packing material in biofilters is an important factor for the success in their construction and operation. Different packing materials have been used in biofiltration without a global agreement about which ones are the most adequate for biofiltration success. The materials studied were chosen according to previous works in the field of biofiltration including both organic and inorganic (or synthetic) materials. A set of nine different parameters were selected to cope with well-established factors, such as a material-specific surface area, pressure drop, nutrient supply, water retentivity, sorption capacity, and purchase cost. One ranking of packing materials was established for each parameter studied in order to define a relative suitability degree. Since biofiltration success generally depends on a combination of the ranked parameters, a procedure was defined to compare packing materials suitability under common situations in biofiltration. The selected scenarios, such as biofiltration of intermittent loads of pollutants and biofiltration of waste gases with low relative humidity, were investigated. The results indicate that, out of the packing materials studied, activated carbons were ranked top of several parameter rankings and were shown to be a significantly better packing material when parameters were combined to assess such selected scenarios.
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Affiliation(s)
- A D Dorado
- Department of Mining Engineering and Natural Resources, EPSEM, Universitat Politècnica de Catalunya, Manresa, Spain
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Dorado AD, RodrÃguez G, Ribera G, Bonsfills A, Gabriel D, Lafuente J, Gamisans X. Evaluation of Mass Transfer Coefficients in Biotrickling Filters: Experimental Determination and Comparison to Correlations. Chem Eng Technol 2009. [DOI: 10.1002/ceat.200900275] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
RESUMO O presente trabalho objetivou avaliar linhagensde algodoeiro com características morfológicas mutantes quanto à infestação pelo bicudo Anthonomus grandis Boheman e suas produções. O experimento foi conduzido em campo, com a cultivar IAC-24 (testemunha), IAC-04/227 (planta vermelha) e IAC-04/489 (folha “okra”). A infestação foi avaliada contando os botões florais perfurados para a alimentação e oviposição do bicudo. A produção foi avaliada pelo do rendimento de algodão. A linhagem IAC-04/227 diferiu da cultivar IAC-24 e da linhagem IAC04/489 até 85 dias após a emergência das plântulas, apresentando menor porcentual de botões florais perfurados pelo bicudo. Este fato indica que a coloração vermelha das plantas é um caráter importante no manejo da resistência do algodoeiro ao bicudo. Não houve diferença significativa, entre os genótipos, para o rendimento de algodão, mas para a massa de 100 sementes, a cultivar IAC-24 diferiu da linhagem IAC-04/227, apresentando a maior média.
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Prado OJ, Gabriel D, Lafuente J. Economical assessment of the design, construction and operation of open-bed biofilters for waste gas treatment. J Environ Manage 2009; 90:2515-23. [PMID: 19249150 DOI: 10.1016/j.jenvman.2009.01.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Revised: 09/25/2008] [Accepted: 01/21/2009] [Indexed: 05/20/2023]
Abstract
A protocol was developed with the purpose of assessing the main costs implied in the set-up, operation and maintenance of a waste gas-treating conventional biofilter. The main operating parameters considered in the protocol were the empty bed residence time and the gas flow rate. A wide variety of investment and operating costs were considered. In order to check its reliability, the protocol was applied to a number of scenarios, with biofilter volumes ranging from 8.3 to 4000 m(3). Results show that total annualized costs were between 20,000 and 220,000 euro/year and directly dependent, among other factors, on the size of the system. Total investment and operating costs for average-size compost biofilters were around 60,000 euro and 20,000 euro/year, respectively, which are concordant with actual costs. Also, a sensitivity analysis was performed in order to assess the relative influence of a series of selected costs. Results prove that operating costs are those that influence the total annual costs to a higher extent. Also, packing material replacement costs contribute significantly to the total yearly costs in biofilters with a volume higher than 800 m(3). Among operating costs, the electricity consumption is the main influencing factor in biofilters with a gas flow rate above 50,000 m(3)/h, while labor costs are critical at lower gas flow rates. In addition, the use of a variety of packing materials commonly employed in biofiltration was assessed. According to the results obtained, special attention should be paid to the packing material selected, as it is the main parameter influencing the medium replacement costs, and one of the main factors affecting investment costs.
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Affiliation(s)
- O J Prado
- Chemical Engineering Department, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain.
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Foster MC, Christensen R, Egan J, Whitley J, Chiu WK, Serody J, Gabriel D, Ivanova A, Dunphy CH, Shea TC. Prognostic impact of bone marrow CD138 immunohistochemistry (IHC) prior to autologous stem cell transplant (ASCT) for multiple myeloma (MM). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.8600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
8600 Background: Low bone marrow plasma cell (BMPC) burden prior to ASCT for MM is associated with favorable outcomes, but is usually determined by morphologic evaluation of marrow aspirates, a method subject to variability in sampling and interpretation. It is unknown if CD138 IHC, a more sensitive measure of BMPC, predicts progression-free survival (PFS), overall survival (OS) or post-ASCT response. Methods: Consecutive patients (n=93) who underwent single ASCT for MM from 2001 to 2008 and had available, stainable bone marrow core biopsies (BMB) obtained <90 days prior to ASCT were included in this single-center retrospective cohort study. BMB and/or clot CD138 IHC staining were reviewed by blinded hematopathologists. Post-ASCT response, PFS, and OS were determined using the International Myeloma Working Group uniform response criteria. Results: Patients were highly cytoreduced prior to ASCT, with 50.5% of pts having 0–5%, 21.5% having 6–10%, 20.4% having 11–20%, and 7.5% having >20% BMPC by CD138 analysis. BMPC% by CD138 IHC correlated with aspirate BMPC% [Pearson correlation coefficient=0.48, 95%CI (0.30, 0.63)]. In 12.6% of patients, BMPC% by CD138 IHC was ≥10% more than the aspirate count. Patients with ≤5% BMPC were more likely to achieve or maintain a CR or VGPR at initial post-ASCT restaging than those with >5% BMPC: Odds Ratio (95% CI) 6.91 (2.12, 22.57), p=. 0005 (chi-squared). With median follow up of 15.4 months for the ≤5% BMPC group and 19.3 months for the >5% BMPC group, 34/93 patients have progressed or died, with no difference between groups. By Kaplan-Meier analysis, PFS was similar regardless of BMPC [3 year estimated PFS (95%CI): ≤5%BMPC, 49.9% (29.4, 70.4) vs. >5%BMPC, 45.5% (26.7, 64.3); HR=1.24 (0.62, 2.49), p=.55, log-rank]. There was no difference in OS [3 year estimated OS (95%CI): ≤5%BMPC, 71.0% (49.7, 92.3) vs. >5%BMPC, 81.8% (66.2, 97.4); HR=0.61 (0.21, 1.78), p=.36, log-rank]. Conclusions: Detection of ≤5% BMPC by CD138 IHC prior to ASCT predicts attainment or maintenance of post-transplant CR/VGPR and correlates with plasma cell morphology. Differences in PFS or OS may emerge with additional follow-up, or if more patients with a higher content of residual plasma cells were transplanted. [Table: see text]
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Affiliation(s)
- M. C. Foster
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - R. Christensen
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - J. Egan
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - J. Whitley
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - W. K. Chiu
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - J. Serody
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - D. Gabriel
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - A. Ivanova
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - C. H. Dunphy
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
| | - T. C. Shea
- University of North Carolina School of Medicine, Chapel Hill, NC; Clinical Pathology Associates Laboratory, Louisville, KY; UNC Lineberger Comprehensive Cancer Center, Chapel Hill, NC; University of North Carolina School of Public Health, Chapel Hill, NC
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Gabriel D, Busso N, So A, van den Bergh H, Gurny R, Lange N. Thrombin-sensitive photodynamic agents: a novel strategy for selective synovectomy in rheumatoid arthritis. J Control Release 2009; 138:225-34. [PMID: 19445983 DOI: 10.1016/j.jconrel.2009.05.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 05/07/2009] [Accepted: 05/08/2009] [Indexed: 11/26/2022]
Abstract
Protease-sensitive macromolecular prodrugs have attracted interest for bio-responsive drug delivery to sites with up-regulated proteolytic activities such as inflammatory or cancerous lesions. Here we report the development of a novel polymeric photosensitizer prodrug (T-PS) to target thrombin, a protease up-regulated in synovial tissues of rheumatoid arthritis (RA) patients, for minimally invasive photodynamic synovectomy. In T-PS, multiple photosensitizer units are tethered to a polymeric backbone via short, thrombin-cleavable peptide linkers. Photoactivity of the prodrug is efficiently impaired due to energy transfer between neighbouring photosensitizer units. T-PS activation by exogenous and endogenous thrombin induced an increase in fluorescence emission by a factor of 16 after in vitro digestion and a selective fluorescence enhancement in arthritic lesions in vivo, in a collagen-induced arthritis mouse model. In vitro studies on primary human synoviocytes showed a phototoxic effect only after enzymatic digestion of the prodrug and light irradiation, thus demonstrating the functionality of T-PS induced PDT. The developed photosensitizer prodrugs combine the passive targeting capacity of macromolecular drug delivery systems with site-selective photosensitizer release and activation. They illuminate lesions with pathologically enhanced proteolytic activity and induce cell death, subsequent to irradiation.
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Affiliation(s)
- Doris Gabriel
- Laboratory of Pharmaceutics and Biopharmaceutics, Section of Pharmaceutical Sciences, University of Lausanne, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
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Kleijn D, Kohler F, Báldi A, Batáry P, Concepción ED, Clough Y, Díaz M, Gabriel D, Holzschuh A, Knop E, Kovács A, Marshall EJP, Tscharntke T, Verhulst J. On the relationship between farmland biodiversity and land-use intensity in Europe. Proc Biol Sci 2009; 276:903-9. [PMID: 19019785 DOI: 10.1098/rspb.2008.1509] [Citation(s) in RCA: 218] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Worldwide agriculture is one of the main drivers of biodiversity decline. Effective conservation strategies depend on the type of relationship between biodiversity and land-use intensity, but to date the shape of this relationship is unknown. We linked plant species richness with nitrogen (N) input as an indicator of land-use intensity on 130 grasslands and 141 arable fields in six European countries. Using Poisson regression, we found that plant species richness was significantly negatively related to N input on both field types after the effects of confounding environmental factors had been accounted for. Subsequent analyses showed that exponentially declining relationships provided a better fit than linear or unimodal relationships and that this was largely the result of the response of rare species (relative cover less than 1%). Our results indicate that conservation benefits are disproportionally more costly on high-intensity than on low-intensity farmland. For example, reducing N inputs from 75 to 0 and 400 to 60kgha-1yr-1 resulted in about the same estimated species gain for arable plants. Conservation initiatives are most (cost-)effective if they are preferentially implemented in extensively farmed areas that still support high levels of biodiversity.
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Affiliation(s)
- D Kleijn
- Alterra, Centre for Ecosystem Studies, Droevendaalsesteeg 3, Wageningen, The Netherlands.
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Gabriel D, Zuluaga MF, Martinez MN, Campo M, Lange N. Urokinase-plasminogen-activator sensitive polymeric photosensitizer prodrugs: design, synthesis and in vitro evaluation. J Drug Deliv Sci Technol 2009. [DOI: 10.1016/s1773-2247(09)50002-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Walko CM, Patel N, Revollo J, Whitley J, Serody J, Gabriel D, Comeau T, McLeod H, Shea TC. Influence of glutathione S-transferase A1 genotype on intravenous busulfan pharmacokinetics. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.14635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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