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Kuil LE, Chauhan RK, de Graaf BM, Cheng WW, Kakiailatu NJM, Lasabuda R, Verhaeghe C, Windster JD, Schriemer D, Azmani Z, Brooks AS, Edie S, Reeves RH, Eggen BJL, Shepherd IT, Burns AJ, Hofstra RMW, Melotte V, Brosens E, Alves MM. ATP5PO levels regulate enteric nervous system development in zebrafish, linking Hirschsprung disease to Down Syndrome. Biochim Biophys Acta Mol Basis Dis 2024; 1870:166991. [PMID: 38128843 DOI: 10.1016/j.bbadis.2023.166991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 12/09/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023]
Abstract
Hirschsprung disease (HSCR) is a complex genetic disorder characterized by the absence of enteric nervous system (ENS) in the distal region of the intestine. Down Syndrome (DS) patients have a >50-fold higher risk of developing HSCR than the general population, suggesting that overexpression of human chromosome 21 (Hsa21) genes contribute to HSCR etiology. However, identification of responsible genes remains challenging. Here, we describe a genetic screening of potential candidate genes located on Hsa21, using the zebrafish. Candidate genes were located in the DS-HSCR susceptibility region, expressed in the human intestine, were known potential biomarkers for DS prenatal diagnosis, and were present in the zebrafish genome. With this approach, four genes were selected: RCAN1, ITSN1, ATP5PO and SUMO3. However, only overexpression of ATP5PO, coding for a component of the mitochondrial ATPase, led to significant reduction of ENS cells. Paradoxically, in vitro studies showed that overexpression of ATP5PO led to a reduction of ATP5PO protein levels. Impaired neuronal differentiation and reduced mitochondrial ATP production, were also detected in vitro, after overexpression of ATP5PO in a neuroblastoma cell line. Finally, epistasis was observed between ATP5PO and ret, the most important HSCR gene. Taken together, our results identify ATP5PO as the gene responsible for the increased risk of HSCR in DS patients in particular if RET variants are also present, and show that a balanced expression of ATP5PO is required for normal ENS development.
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Affiliation(s)
- L E Kuil
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - R K Chauhan
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - B M de Graaf
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - W W Cheng
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - N J M Kakiailatu
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - R Lasabuda
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - C Verhaeghe
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - J D Windster
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands; Department of Pediatric Surgery, Erasmus University Medical Center Rotterdam, Sophia's Children's Hospital, Rotterdam, the Netherlands
| | - D Schriemer
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Z Azmani
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - A S Brooks
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - S Edie
- Johns Hopkins University School of Medicine, Department of Physiology and McKusick-Nathans Department of Genetic Medicine, Baltimore, MD, United States of America
| | - R H Reeves
- Johns Hopkins University School of Medicine, Department of Physiology and McKusick-Nathans Department of Genetic Medicine, Baltimore, MD, United States of America
| | - B J L Eggen
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - I T Shepherd
- Department of Biology, Emory University, Atlanta, GA, United States of America
| | - A J Burns
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands; Birth Defects Research Centre, UCL Institute of Child Health, London, United Kingdom; Gastrointestinal Drug Discovery Unit, Takeda Pharmaceuticals, Cambridge, MA, United States of America
| | - R M W Hofstra
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - V Melotte
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands; Department of Pathology, GROW-school for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - E Brosens
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands
| | - M M Alves
- Department of Clinical Genetics, Erasmus University Medical Center Rotterdam - Sophia Children's Hospital, Rotterdam, the Netherlands; Department of Pediatric Surgery, Erasmus University Medical Center Rotterdam, Sophia's Children's Hospital, Rotterdam, the Netherlands.
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Santos CF, Andrade SM, Mil-Homens D, Montemor MF, Alves MM. Antibacterial Activity of ZnO Nanoparticles in a Staphylococcus- aureus-Infected Galleria mellonella Model Is Tuned by Different Apple-Derived Phytocargos. J Funct Biomater 2023; 14:463. [PMID: 37754877 PMCID: PMC10532052 DOI: 10.3390/jfb14090463] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/24/2023] [Accepted: 09/03/2023] [Indexed: 09/28/2023] Open
Abstract
This research investigates pH changes during the green synthesis of ZnO nanoparticles (NPs) and emphasises its importance in their physicochemical, antibacterial, and biological properties. Varying the synthesis pH from 8 to 12 using "Bravo de Esmolfe" apple extracts neither affected the morphology nor crystallinity of ZnO but impacted NP phytochemical loads. This difference is because alkaline hydrolysis of phytochemicals occurred with increasing pH, resulting in BE-ZnO with distinct phytocargos. To determine the toxicity of BE-ZnO NPs, Galleria mellonella was used as an alternative to non-rodent models. These assays showed no adverse effects on larvae up to a concentration of 200 mg/kg and that NPs excess was relieved by faeces and silk fibres. This was evaluated by utilising fluorescence-lifetime imaging microscopy (FLIM) to track NPs' intrinsic fluorescence. The antibacterial efficacy against Staphylococcus aureus was higher for BE-ZnO12 than for BE-ZnO8; however, a different trend was attained in an in vivo infection model. This result may be related to NPs' residence in larvae haemocytes, modulated by their phytocargos. This research demonstrates, for the first time, the potential of green synthesis to modulate the biosafety and antibacterial activity of NPs in an advanced G. mellonella infection model. These findings support future strategies to overcome antimicrobial resistance by utilizing distinct phytocargos to modulate NPs' action over time.
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Affiliation(s)
- Catarina F. Santos
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910-761 Setúbal, Portugal
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química (DEQ), Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (S.M.A.); (M.F.M.)
| | - Suzana M. Andrade
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química (DEQ), Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (S.M.A.); (M.F.M.)
- Departamento de Engenharia Química (DEQ), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Dalila Mil-Homens
- iBB-Institute for Bioengineering and Biosciences, i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - M. Fátima Montemor
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química (DEQ), Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (S.M.A.); (M.F.M.)
- Departamento de Engenharia Química (DEQ), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Marta M. Alves
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química (DEQ), Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; (S.M.A.); (M.F.M.)
- Departamento de Engenharia Química (DEQ), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Mota J, Bravo C, Santos C, Alves PC, Rijo P, Antunes AM, Grenho L, Helena Fernandes M, Alves MM, André V. Eco-friendly fabricated multibioactive Ca(II)-antibiotic coordination framework coating on zinc towards improved bone tissue regeneration. Colloids Surf B Biointerfaces 2022; 221:113008. [DOI: 10.1016/j.colsurfb.2022.113008] [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] [Received: 09/15/2022] [Revised: 10/24/2022] [Accepted: 11/04/2022] [Indexed: 11/13/2022]
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Pinto SN, Mil-Homens D, Pires RF, Alves MM, Serafim G, Martinho N, Melo M, Fialho AM, Bonifácio VDB. Core-shell polycationic polyurea pharmadendrimers: new-generation of sustainable broad-spectrum antibiotics and antifungals. Biomater Sci 2022; 10:5197-5207. [PMID: 35880970 DOI: 10.1039/d2bm00679k] [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: 11/21/2022]
Abstract
The efficacy of conventional antimicrobials is falling to critical levels and raising alarming concerns around the globe. In this scenery, engineered nanoparticles emerged as a solid strategy to fight growing deadly infections. Here, we show the in vitro and in vivo performance of pharmadendrimers, a novel class of engineered polyurea dendrimers that are synthetic mimics of antibacterial peptides, against a collection of both Gram-positive and Gram-negative bacteria and fungi. These nanobiomaterials are stable solids prepared by low-cost and green processes, display a dense positively charged core-shell, and are biocompatible and hemocompatible drugs. Mechanistic data, corroborated by coarse-grained molecular dynamics simulations, points towards a fast-killing mechanism via membrane disruption, triggered by electrostatic interactions. Altogether this study provides strong evidence and support for the future use of polyurea pharmadendrimers in antibacterial and antifungal nanotherapeutics.
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Affiliation(s)
- Sandra N Pinto
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Dalila Mil-Homens
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Rita F Pires
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Marta M Alves
- Centro de Química Estrutural (CQE), Institute of Molecular Sciences, Instituto Superior Técnico (IST), Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Gabriel Serafim
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Nuno Martinho
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Manuel Melo
- Instituto de Tecnologia Química Biológica António Xavier, Universidade NOVA de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Arsénio M Fialho
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. .,Bioengineering Department, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Vasco D B Bonifácio
- iBB-Institute for Bioengineering and Biosciences and i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. .,Bioengineering Department, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Alves MM, Batista C, Mil-Homens D, Grenho L, Fernandes MH, Santos CF. Enhanced antibacterial activity of Rosehip extract-functionalized Mg(OH) 2 nanoparticles: An in vitro and in vivo study. Colloids Surf B Biointerfaces 2022; 217:112643. [PMID: 35759895 DOI: 10.1016/j.colsurfb.2022.112643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/07/2022] [Accepted: 06/13/2022] [Indexed: 10/18/2022]
Abstract
The development of nanoparticles as antimicrobial agents against pathogenic bacteria has emerged as one of the leading global healthcare challenges. In this study, Mg(OH)2 NPs with controlled morphology and nanometric size, using two distinct counterions, chloride or nitrate, have been synthesized using Rosehip (RH) extract that has privileges beyond conventional chemical and physical methods. Various physicochemical techniques were used to characterize the RH-functionalized Mg-based NPs. They exhibited a spherical shape with a diameter of ~10 nm, low crystallinity compared to non-functionalized NPs, high polyphenol content, and negative zeta potential in three different media (H2O, TSB, and cell medium). The resulting RH-functionalized Mg-based NPs also exhibited an increased antibacterial activity against Gram-positive (S. Epidermis and S. aureus) and Gram-negative (E. Coli) bacteria compared to those prepared in pure water (0 % RH), an effect that was well evident with low NPs contents (250 μg/mL). A preliminary attempt to elucidate their mechanism of action revealed that RH-functionalized Mg-based NPs could disrupt cellular structures (bacterial cell wall and cytoplasmic membrane) and damage the bacterial cell, as confirmed by TEM imaging. Noteworthy is that Mg-based NPs exhibited higher toxicity to bacteria than to eukaryotic cells. More significantly, was their enhanced in vivo efficacy in a Galleria mellonella invertebrate animal model, when infected with S. aureus bacteria. Overall, our findings indicate that well-engineered Rosehip magnesium-based nanoparticles can be used as a green non-cytotoxic polyphenolic source in different antibacterial applications for the biomedical industry.
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Affiliation(s)
- Marta M Alves
- Centro Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Catarina Batista
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, Setúbal 2910, Portugal
| | - Dalila Mil-Homens
- iBB - Institute for Bioengineering and Biosciences and i4HB, Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Liliana Grenho
- Faculdade de Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Universidade do Porto, Porto 4200-393, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal
| | - Maria H Fernandes
- Faculdade de Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Universidade do Porto, Porto 4200-393, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal.
| | - Catarina F Santos
- Centro Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal; EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, Setúbal 2910, Portugal.
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Pinho LC, Alves MM, Colaço B, Fernandes MH, Santos C. Green-Synthesized Magnesium Hydroxide Nanoparticles Induced Osteoblastic Differentiation in Bone Co-Cultured Cells. Pharmaceuticals (Basel) 2021; 14:ph14121281. [PMID: 34959683 PMCID: PMC8704631 DOI: 10.3390/ph14121281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 01/04/2023] Open
Abstract
In this work, magnesium hydroxide NPs were synthesized using water (Mg(OH)2 NPs) or a rose hip (RH) extract (Mg(OH)2RH NPs) and tested for the bone cells’ effects in co-cultured osteoblastic and osteoclastic cells, using a Transwell® insert system, allowing reciprocal cell paracrine interactions. Behavior of each cell population was characterized for typical phenotype markers, at days 1 and 6. Cell cultures treated with osteogenic/osteoclastogenic inducers were used as positive control of cell differentiation. The NPs presented a round shape morphology with an average diameter ~90 nm (Mg(OH)2 NPs) and below 10 nm (Mg(OH)2RH NPs. Both NPs induced osteoblastic and osteoclastic behavior similarly to that observed in induced osteoblastic and osteoclastic cultures (positive controls). Differences between the two types of particles were evident at the gene expression level. Compared to Mg(OH)2 NPs, the green-synthesized NPs greatly increased the expression of osteoblastic genes coding for the early markers ALP and collagen type 1 and the later transcription factor osterix, while decreasing the expression of osteoclastogenic genes, namely the essential transcription factor NFATC1, TRAP and the genes coding for the functional markers CA2 and CTSK. Overall, a positive added effect could be hypothesized for Mg(OH)2RH NPs with potential usefulness to promote bone formation in regenerative applications.
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Affiliation(s)
- Laura Costa Pinho
- Department of Animal Science, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal;
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal;
- Correspondence: (L.C.P.); (C.S.)
| | - Marta M. Alves
- CQE Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
| | - Bruno Colaço
- Department of Animal Science, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal;
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
- CECAV—Animal and Veterinary Research Centre UTAD, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
| | - Maria Helena Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal;
- LAQV/Requimte, University of Porto, 4100-007 Porto, Portugal
| | - Catarina Santos
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910-761 Setúbal, Portugal
- Correspondence: (L.C.P.); (C.S.)
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Ntungwe E, Domínguez-Martín EM, Bangay G, Garcia C, Guerreiro I, Colombo E, Saraiva L, Díaz-Lanza AM, Rosatella A, Alves MM, Reis CP, Passarella D, Rijo P. Self-Assembly Nanoparticles of Natural Bioactive Abietane Diterpenes. Int J Mol Sci 2021; 22:ijms221910210. [PMID: 34638551 PMCID: PMC8508833 DOI: 10.3390/ijms221910210] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/10/2021] [Accepted: 09/16/2021] [Indexed: 11/16/2022] Open
Abstract
Different approaches have been reported to enhance penetration of small drugs through physiological barriers; among them is the self-assembly drug conjugates preparation that shows to be a promising approach to improve activity and penetration, as well as to reduce side effects. In recent years, the use of drug-conjugates, usually obtained by covalent coupling of a drug with biocompatible lipid moieties to form nanoparticles, has gained considerable attention. Natural products isolated from plants have been a successful source of potential drug leads with unique structural diversity. In the present work three molecules derived from natural products were employed as lead molecules for the synthesis of self-assembled nanoparticles. The first molecule is the cytotoxic royleanone 7α-acetoxy-6β-hydroxyroyleanone (Roy, 1) that has been isolated from hairy coleus (Plectranthus hadiensis (Forssk.) Schweinf). ex Sprenger leaves in a large amount. This royleanone, its hemisynthetic derivative 7α-acetoxy-6β-hydroxy-12-benzoyloxyroyleanone (12BzRoy, 2) and 6,7-dehydroroyleanone (DHR, 3), isolated from the essential oil of thicket coleus (P. madagascariensis (Pers.) Benth.) were employed in this study. The royleanones were conjugated with squalene (sq), oleic acid (OA), and/or 1-bromododecane (BD) self-assembly inducers. Roy-OA, DHR-sq, and 12BzRoy-sq conjugates were successfully synthesized and characterized. The cytotoxic effect of DHR-sq was previously assessed on three human cell lines: NCI-H460 (IC50 74.0 ± 2.2 µM), NCI-H460/R (IC50 147.3 ± 3.7 µM), and MRC-5 (IC50 127.3 ± 7.3 µM), and in this work Roy-OA NPs was assayed against Vero-E6 cells at different concentrations (0.05, 0.1, and 0.2 mg/mL). The cytotoxicity of DHR-sq NPs was lower when compared with DHR alone in these cell lines: NCI-H460 (IC50 10.3 ± 0.5 µM), NCI-H460/R (IC50 10.6 ± 0.4 µM), and MRC-5 (IC5016.9 ± 0.5 µM). The same results were observed with Roy-OA NPs against Vero-E6 cells as was found to be less cytotoxic than Roy alone in all the concentrations tested. From the obtained DLS results, 12BzRoy-sq assemblies were not in the nano range, although Roy-OA NP assemblies show a promising size (509.33 nm), Pdl (0.249), zeta potential (−46.2 mV), and spherical morphology from SEM. In addition, these NPs had a low release of Roy at physiological pH 7.4 after 24 h. These results suggest the nano assemblies can act as prodrugs for the release of cytotoxic lead molecules.
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Affiliation(s)
- Epole Ntungwe
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group, Department of Biomedical Sciences, Faculty of Pharmacy, University of Alcalá de Henares, Ctra. A2, Km 33.100–Campus Universitario, 28805 Alcalá de Henares, Spain;
| | - Eva María Domínguez-Martín
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group, Department of Biomedical Sciences, Faculty of Pharmacy, University of Alcalá de Henares, Ctra. A2, Km 33.100–Campus Universitario, 28805 Alcalá de Henares, Spain;
| | - Gabrielle Bangay
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group, Department of Biomedical Sciences, Faculty of Pharmacy, University of Alcalá de Henares, Ctra. A2, Km 33.100–Campus Universitario, 28805 Alcalá de Henares, Spain;
| | - Catarina Garcia
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group, Department of Biomedical Sciences, Faculty of Pharmacy, University of Alcalá de Henares, Ctra. A2, Km 33.100–Campus Universitario, 28805 Alcalá de Henares, Spain;
| | - Iris Guerreiro
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
| | - Eleonora Colombo
- Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milano, Italy; (E.C.); (D.P.)
| | - Lucilia Saraiva
- LAQV-Faculty of Pharmacy of University of Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal;
| | - Ana María Díaz-Lanza
- Pharmacology Area (Pharmacognosy Laboratory), New Antitumor Compounds: Toxic Action on Leukemia Cells Research Group, Department of Biomedical Sciences, Faculty of Pharmacy, University of Alcalá de Henares, Ctra. A2, Km 33.100–Campus Universitario, 28805 Alcalá de Henares, Spain;
| | - Andreia Rosatella
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
- iMed.ULisboa, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal;
| | - Marta M. Alves
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal;
| | - Catarina Pinto Reis
- iMed.ULisboa, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal;
| | - Daniele Passarella
- Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milano, Italy; (E.C.); (D.P.)
| | - Patricia Rijo
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisbon, Portugal; (E.N.); (E.M.D.-M.); (G.B.); (C.G.); (I.G.); (A.R.)
- iMed.ULisboa, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal;
- Correspondence:
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8
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Silva RM, Abreu AA, Salvador AF, Alves MM, Neves IC, Pereira MA. Zeolite addition to improve biohydrogen production from dark fermentation of C5/C6-sugars and Sargassum sp. biomass. Sci Rep 2021; 11:16350. [PMID: 34381104 PMCID: PMC8358045 DOI: 10.1038/s41598-021-95615-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/20/2021] [Indexed: 11/17/2022] Open
Abstract
Thermophilic biohydrogen production by dark fermentation from a mixture (1:1) of C5 (arabinose) and C6 (glucose) sugars, present in lignocellulosic hydrolysates, and from Sargassum sp. biomass, is studied in this work in batch assays and also in a continuous reactor experiment. Pursuing the interest of studying interactions between inorganic materials (adsorbents, conductive and others) and anaerobic bacteria, the biological processes were amended with variable amounts of a zeolite type-13X in the range of zeolite/inoculum (in VS) ratios (Z/I) of 0.065–0.26 g g−1. In the batch assays, the presence of the zeolite was beneficial to increase the hydrogen titer by 15–21% with C5 and C6-sugars as compared to the control, and an increase of 27% was observed in the batch fermentation of Sargassum sp. Hydrogen yields also increased by 10–26% with sugars in the presence of the zeolite. The rate of hydrogen production increased linearly with the Z/I ratios in the experiments with C5 and C6-sugars. In the batch assay with Sargassum sp., there was an optimum value of Z/I of 0.13 g g−1 where the H2 production rate observed was the highest, although all values were in a narrow range between 3.21 and 4.19 mmol L−1 day−1. The positive effect of the zeolite was also observed in a continuous high-rate reactor fed with C5 and C6-sugars. The increase of the organic loading rate (OLR) from 8.8 to 17.6 kg m−3 day−1 of COD led to lower hydrogen production rates but, upon zeolite addition (0.26 g g−1 VS inoculum), the hydrogen production increased significantly from 143 to 413 mL L−1 day−1. Interestingly, the presence of zeolite in the continuous operation had a remarkable impact in the microbial community and in the profile of fermentation products. The effect of zeolite could be related to several properties, including the porous structure and the associated surface area available for bacterial adhesion, potential release of trace elements, ion-exchanger capacity or ability to adsorb different compounds (i.e. protons). The observations opens novel perspectives and will stimulate further research not only in biohydrogen production, but broadly in the field of interactions between bacteria and inorganic materials.
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Affiliation(s)
- R M Silva
- CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - A A Abreu
- CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - A F Salvador
- CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - M M Alves
- CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - I C Neves
- CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.,CQUM-Centre of Chemistry, University of Minho, 4710-057, Braga, Portugal
| | - M A Pereira
- CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
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9
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Pinheiro MJF, Costa JP, Marques F, Mira NP, Carvalho MFNN, Alves MM. Bioactive Coatings with Ag-Camphorimine Complexes to Prevent Surface Colonization by the Pathogenic Yeast Candida albicans. Antibiotics (Basel) 2021; 10:antibiotics10060638. [PMID: 34073375 PMCID: PMC8227220 DOI: 10.3390/antibiotics10060638] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/22/2021] [Accepted: 05/25/2021] [Indexed: 01/08/2023] Open
Abstract
Currently there is a gap between the rate of new antifungal development and the emergence of resistance among Candida clinical strains, particularly threatened by the extreme adhesiveness of C. albicans to indwelling medical devices. Two silver camphorimine complexes, [Ag(OH){OC10H14N(C6H4)2NC10H14O}] (compound P) and [{Ag(OC10H14NC6H4CH3-p)}2(μ-O)] (compound Q), are herein demonstrated as having high inhibiting activity towards the growth of Candida albicans and Candida glabrata clinical strains resistant to azoles, the frontline antifungals used in clinical practice. Compounds P and Q were also explored as bioactive coatings to prevent colonization by C. albicans and colonize the surface of indwelling medical devices, resulting in persistent infections. Functionalization of stainless steel with polycaprolactone (PCL) matrix embedded with compounds P or Q was reported for the first time to inhibit the colonization of C. albicans by 82% and 75%, respectively. The coating of PCL loaded with Q or P did not cause cytotoxic effects in mammalian cells, demonstrating the biocompatibility of the explored approach. The identification and further exploration of new approaches for surface engineering based on new molecules that can sensitize resistant strains, as herein demonstrated for complexes P and Q, is a significant step forward to improve the successful treatment of candidiasis.
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Affiliation(s)
- M. Joana F. Pinheiro
- Department of Bioengineering, Instituto de Bioengenharia e Biociências (iBB), Instituto Superior Técnico, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal;
| | - Joana P. Costa
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares (CTN), Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal;
| | - Nuno P. Mira
- Department of Bioengineering, Instituto de Bioengenharia e Biociências (iBB), Instituto Superior Técnico, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal;
- Correspondence: (N.P.M.); (M.F.N.N.C.); (M.M.A.)
| | - M. Fernanda N. N. Carvalho
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- Correspondence: (N.P.M.); (M.F.N.N.C.); (M.M.A.)
| | - Marta M. Alves
- Centro de Química Estrutural (CQE), Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- Correspondence: (N.P.M.); (M.F.N.N.C.); (M.M.A.)
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10
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Pimenta AI, Bernardes N, Alves MM, Mil-Homens D, Fialho AM. Burkholderia cenocepacia transcriptome during the early contacts with giant plasma membrane vesicles derived from live bronchial epithelial cells. Sci Rep 2021; 11:5624. [PMID: 33707642 PMCID: PMC7970998 DOI: 10.1038/s41598-021-85222-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 02/22/2021] [Indexed: 01/31/2023] Open
Abstract
Burkholderia cenocepacia is known for its capacity of adherence and interaction with the host, causing severe opportunistic lung infections in cystic fibrosis patients. In this work we produced Giant Plasma Membrane Vesicles (GPMVs) from a bronchial epithelial cell line and validated their use as a cell-like alternative to investigate the steps involved in the adhesion process of B. cenocepacia. RNA-sequencing was performed and the analysis of the B. cenocepacia K56-2 transcriptome after the first contacts with the surface of host cells allowed the recognition of genes implicated in bacterial adaptation and virulence-associated functions. The sensing of host membranes led to a transcriptional shift that caused a cascade of metabolic and physiological adaptations to the host specific environment. Many of the differentially expressed genes encode proteins related with central metabolic pathways, transport systems, cellular processes, and virulence traits. The understanding of the changes in gene expression that occur in the early steps of infection can uncover new proteins implicated in B. cenocepacia-host cell adhesion, against which new blocking agents could be designed to control the progression of the infectious process.
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Affiliation(s)
- Andreia I. Pimenta
- iBB-Institute for Bioengineering and Biosciences, Biological Sciences Research Group, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal
| | - Nuno Bernardes
- iBB-Institute for Bioengineering and Biosciences, Biological Sciences Research Group, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal
| | - Marta M. Alves
- grid.9983.b0000 0001 2181 4263CQE Instituto Superior Técnico, Departamento de Engenharia Química, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Dalila Mil-Homens
- iBB-Institute for Bioengineering and Biosciences, Biological Sciences Research Group, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal
| | - Arsenio M. Fialho
- iBB-Institute for Bioengineering and Biosciences, Biological Sciences Research Group, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal ,grid.9983.b0000 0001 2181 4263Department of Bioengineering, Instituto Superior Técnico, University of Lisbon, Lisbon, Portugal
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11
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Babu KS, Pinheiro PF, Marques CF, Justino GC, Andrade SM, Alves MM. Flexible ZnO-mAb nanoplatforms for selective peripheral blood mononuclear cell immobilization. Sci Rep 2020; 10:15018. [PMID: 32929172 PMCID: PMC7490409 DOI: 10.1038/s41598-020-72133-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 08/25/2020] [Indexed: 11/09/2022] Open
Abstract
Cancer is the second cause of death worldwide. This devastating disease requires specific, fast, and affordable solutions to mitigate and reverse this trend. A step towards cancer-fighting lies in the isolation of natural killer (NK) cells, a set of innate immune cells, that can either be used as biomarkers of tumorigenesis or, after autologous transplantation, to fight aggressive metastatic cells. In order to specifically isolate NK cells (which express the surface NKp30 receptor) from peripheral blood mononuclear cells, a ZnO immunoaffinity-based platform was developed by electrodeposition of the metal oxide on a flexible indium tin oxide (ITO)-coated polyethylene terephthalate (PET) substrate. The resulting crystalline and well-aligned ZnO nanorods (NRs) proved their efficiency in immobilizing monoclonal anti-human NKp30 antibodies (mAb), obviating the need for additional procedures for mAb immobilization. The presence of NK cells on the peripheral blood mononuclear cell (PBMCs) fraction was evaluated by the response to their natural ligand (B7-H6) using an acridine orange (AO)-based assay. The successful selection of NK cells from PBMCs by our nanoplatform was assessed by the photoluminescent properties of AO. This easy and straightforward ZnO-mAb nanoplatform paves the way for the design of biosensors for clinic diagnosis, and, due to its inherent biocompatibility, for the initial selection of NK cells for autotransplantation immunotherapies.
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Affiliation(s)
- K Sowri Babu
- Division of Physics, Dept. Of Science and Humanities, Vignan's Foundation for Science, Technology & Research (Deemed To Be University), Vadlamudi, Guntur, AP, 522213, India
| | - Pedro F Pinheiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Cátia F Marques
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Gonçalo C Justino
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
| | - Suzana M Andrade
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
| | - Marta M Alves
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
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12
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Fernandes MH, Alves MM, Cebotarenco M, Ribeiro IAC, Grenho L, Gomes PS, Carmezim MJ, Santos CF. Citrate zinc hydroxyapatite nanorods with enhanced cytocompatibility and osteogenesis for bone regeneration. Mater Sci Eng C Mater Biol Appl 2020; 115:111147. [PMID: 32600733 DOI: 10.1016/j.msec.2020.111147] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 05/14/2020] [Accepted: 05/31/2020] [Indexed: 12/13/2022]
Abstract
The development of biomaterials that mimicking the hydroxyapatite nanoparticles existent in the immature bone tissue is crucial, especially to accelerate the bone remodeling and regeneration. In this work, it was developed for the first time, hydroxyapatite nanoparticles (NPs) incorporating citrate and zinc (cit-Zn-Hap) in their composition towards a one-step hydrothermal procedure. For comparison purposes, hydroxyapatite NPs incorporating only zinc (Zn-Hap) or citrate (cit-Hap), as well as hydroxyapatite without any of these elements (Hap) were synthesised. The physicochemical characterization was carried out reveling that, the presence of zinc on hydroxyapatite (cit-Zn-Hap), reduced the size of nanoparticles, changed the phosphate environment and decreased the surface charge when compared with cit-Hap nanoparticles. The osteogenic potential of cit-Zn-Hap NPs was analysed in human bone marrow-derived stromal cells (BMSCs), in the absence of osteoinductive factors. NPs were internalized by endocytosis appearing trapped in endosomes and lysosomes scattered through the cytoplasm. Exposure to these NPs resulted in a significant induction of ALP activity, extracellular matrix mineralization, and gene expression of early and later osteogenic transcription factors, as well as of osteoblastic markers. The osteoinductive effect might be regulated, at least in part, by the increased signalling through the canonical WNT pathway. Evaluation of the cell behaviour following exposure to Zn-Hap and cit-Hap strongly suggested a synergistic effect of citrate and Zn in cit-Zn-Hap NPs towards the induction of the osteogenic commitment and functionality of BMSCs. These findings will allow the design of new biomimetic hydroxyapatite nanoparticles with great potential for bone regeneration.
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Affiliation(s)
- Maria H Fernandes
- Faculdade de Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Universidade do Porto, Porto 4200-393, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal.
| | - Marta M Alves
- Centro Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Mariana Cebotarenco
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal
| | - Isabel A C Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Liliana Grenho
- Faculdade de Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Universidade do Porto, Porto 4200-393, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal
| | - Pedro S Gomes
- Faculdade de Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Universidade do Porto, Porto 4200-393, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal
| | - Maria J Carmezim
- Centro Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal
| | - Catarina F Santos
- Centro Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal.
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13
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Souza JAS, Alves MM, Barbosa DB, Lopes MM, Pinto E, Figueiral MH, Delbem ACB, Mira NP. Study of the activity of Punica granatum-mediated silver nanoparticles against Candida albicans and Candida glabrata, alone or in combination with azoles or polyenes. Med Mycol 2020; 58:564-567. [PMID: 31509195 DOI: 10.1093/mmy/myz094] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/21/2019] [Accepted: 09/04/2019] [Indexed: 01/28/2023] Open
Abstract
The continuous emergence of Candida strains resistant to currently used antifungals demands the development of new alternatives that could reduce the burden of candidiasis. In this work silver nanoparticles synthesized using a green route are efficiently used, alone or in combination with fluconazole, amphotericin B or nystatine, to inhibit growth of C. albicans and C. glabrata oral clinical strains, including in strains showing resistance to fluconazole. A potent inhibitory effect over biofilm formation prompted by the two Candida species was also observed, including in mature biofilm cells. These results foster the use of phytotherapeutics as effective treatments in oral candidiasis.
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Affiliation(s)
- José António Santos Souza
- São Paulo State University (UNESP), School of Dentistry Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba, São Paulo, Brazil
| | - Marta M Alves
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - Debora Barros Barbosa
- São Paulo State University (UNESP), School of Dentistry Araçatuba, Department of Dental Materials and Prosthodontics, São Paulo, Brazil
| | - Maria Manuel Lopes
- Faculdade de Farmácia da Universidade de Lisboa, Departamento de Microbiologia e Imunologia, Av. Prof. Gama Pinto, 1649-003 Lisbon
| | - Eugénia Pinto
- Laboratory of Microbiology, Biological Sciences Department, Faculty of Pharmacy of University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.,Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208 Matosinhos, Portugal
| | - Maria Helena Figueiral
- Faculty of Dentistry, Porto University, Rua Manuel Pereira da Silva, 4200-392 Porto, Portugal
| | - Alberto Carlos B Delbem
- São Paulo State University (UNESP), School of Dentistry Araçatuba, Department of Pediatric Dentistry and Public Health, Araçatuba, São Paulo, Brazil
| | - Nuno Pereira Mira
- iBB, Institute for Bioengineering and Biosciences, Instituto Superior Técnico - Department of Bioengineering, Universidade de Lisboa, Lisbon, Portugal
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14
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Arrés M, Salama M, Rechena D, Paradiso P, Reis L, Alves MM, Botelho do Rego AM, Carmezim MJ, Vaz MF, Deus AM, Santos C. Surface and mechanical properties of a nanostructured citrate hydroxyapatite coating on pure titanium. J Mech Behav Biomed Mater 2020; 108:103794. [PMID: 32469718 DOI: 10.1016/j.jmbbm.2020.103794] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 04/02/2020] [Accepted: 04/12/2020] [Indexed: 01/13/2023]
Abstract
The presence of a biomimetic HAP coating on titanium surface, which reduces the structural stiffness, is essential to improve implants biocompatibility and osteointegration. In this study, new citrate-HAP (cHAP) coatings were produced by a simple hydrothermal method on pure titanium (Ti) surface, without requiring any additional pretreatment on this metal surface. The formed cHAP coatings consisting of nanorod-like hydroxyapatite particles, conferred nanoroughness and wettability able to endow improved biological responses. Indeed, the presence of citrate species in the precipitate medium seems to be responsible for controlling the morphology of the new coatings. The presence of citrate groups on the surface of cHAP coatings, identified by chemical composition analysis, due to their implication in bone metabolism can additionally bring an add-value for bone implant applications. From a mechanical point of view, the Finite Element algorithm showing that cHAP coatings tend to decrease the mechanical stress at pure Ti, further favors these new coatings applicability. Overall, the simple and expedite strategy used to developed new biomimetic coatings of citrate-HAP resulted in improved physicochemical, morphological and mechanical properties of Ti, which can endeavor improved implantable materials in bone healing surgical procedures.
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Affiliation(s)
- Mar Arrés
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Mariana Salama
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Diogo Rechena
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Patrizia Paradiso
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Luis Reis
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Marta M Alves
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Ana M Botelho do Rego
- CQFM (IN) and BSIRG (iBB), Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Maria J Carmezim
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; ESTSetubal, CDP2T, Instituto Politécnico de Setúbal, Setúbal, Portugal
| | - Maria Fátima Vaz
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Augusto M Deus
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Catarina Santos
- CQE, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal; ESTSetubal, CDP2T, Instituto Politécnico de Setúbal, Setúbal, Portugal.
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15
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Soliman MMA, Alegria ECBA, Ribeiro APC, Alves MM, Saraiva MS, Fátima Montemor M, Pombeiro AJL. Green synthesis of zinc oxide particles with apple-derived compounds and their application as catalysts in the transesterification of methyl benzoates. Dalton Trans 2020; 49:6488-6494. [PMID: 32364212 DOI: 10.1039/d0dt01069c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
ZnO nanoparticles (ZnONPs) were successfully synthesized using bravo-de-esmolfe apple extract in aqueous medium at room temperature. ZnO microparticles, prepared with a pure apple phytochemical, quercetin (ZnOq), or without phytochemicals (ZnO) were studied for comparative purposes. The re-use of apple waste for highly efficient catalyst production, based on green synthetic routes, can be added to the concept of a circular economy. The synthesized ZnO particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N2 adsorption/desorption Brunauer-Emmett-Teller (BET) theory. The XRD patterns indicated the formation of a hexagonal wurtzite phase with high purity and SEM and TEM analyses revealed the morphology of the particles. The apple extract produced spherical ZnONPs composed of round lamina-like structures, similar to the micro sized lamina-like shape of ZnOq and dissimilar to the flower-like shape of ZnO. The green synthesized ZnO nanoparticles (ZnONPs) led to a high product yield of ca. 96% within 24 h of reaction time in the transesterification reaction of different carboxylic esters.
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Affiliation(s)
- Mohamed M A Soliman
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Portugal. and Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Elisabete C B A Alegria
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Portugal. and Área Departamental de Engenharia Química, ISEL, Instituto Politécnico de Lisboa, Portugal.
| | - Ana P C Ribeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Portugal.
| | - Marta M Alves
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Portugal.
| | - Marta S Saraiva
- Centro de Química e Bioquímica, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal and BioISI - Biosystems & Integrative Science Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Lisboa, Portugal
| | - M Fátima Montemor
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Portugal.
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Portugal.
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16
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Alves MM, Mil-Homens D, Pinto S, Santos CF, Montemor MF. Antagonist biocompatibilities of Zn-based materials functionalized with physiological active metal oxides. Colloids Surf B Biointerfaces 2020; 191:110990. [PMID: 32240920 DOI: 10.1016/j.colsurfb.2020.110990] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/04/2020] [Accepted: 03/23/2020] [Indexed: 01/05/2023]
Abstract
Zinc coated with nanostructured ZnO flowers has received increasing attention as a versatile biomaterial for medical applications. Whatsoever, the potential of these materials to meet specific medical requirements must be explored. Despite in its infancy, surface functionalization is the key strategy to achieve this goal. The functionalization, successfully achieved with cooper (Cu), iron (Fe) or manganese (Mn) oxides (Ox), was highly dependent on the presence of the flowered structures, with the deep physicochemical characterization of these new surfaces revealing specific metal oxide distributions. The functionalization with these metal oxides resulted in distinct biological and in vitro behaviours. The biological response, assessed by fibroblast viability, hemocompatibility, and chick chorioallantoic membrane (CAM), further supported by the in vitro degradation studies, evaluated by immersion and electrochemical techniques, revealed that the deleterious role of CuOx functionalization brought potential for anti-cancer applications; with an antagonist behaviour, the functionalization with MnOx, and in a less extent with FeOx, can be used to favour wound healing in traumatic processes. Despite the possible correlation between biocompatibility and hydroxyapatite precipitation, no correlation could be drawn with the corrosion activity of these surfaces. Overall, the minor addition of relevant physiological as Cu, Fe or Mn oxides resulted in antagonist in vitro responses that can be used as expedite strategies to modulate the behaviour of Zn-based materials, contributing in this way for the design of anti-cancer or wound healing therapies.
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Affiliation(s)
- Marta M Alves
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
| | - Dalila Mil-Homens
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Sandra Pinto
- iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal; Centro de Química-Física Molecular e IN, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Catarina F Santos
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal; EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal
| | - M F Montemor
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
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Ziadi I, Alves MM, Taryba M, El-Bassi L, Hassairi H, Bousselmi L, Montemor MF, Akrout H. Microbiologically influenced corrosion mechanism of 304L stainless steel in treated urban wastewater and protective effect of silane-TiO 2 coating. Bioelectrochemistry 2019; 132:107413. [PMID: 31816578 DOI: 10.1016/j.bioelechem.2019.107413] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 11/08/2019] [Accepted: 11/08/2019] [Indexed: 12/14/2022]
Abstract
Microbiologically influenced corrosion (MIC) of bare and silane-TiO2 sol-gel coated stainless steel (SS) was studied in treated urban wastewater (TUWW). Combining the electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET) showed that SS surface colonization occurs, at earlier stages, by iron-oxidizing bacteria (IOB), and later by sulphate-reducing bacteria (SRB). The SVET results showed that chemical corrosion process and bacterial respiration led to the depletion of dissolved oxygen, creating a differential aeration cell and thus a localized corrosion phenomenon. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) showed that the growth of a bacterial biofilm on 304L SS was a dynamic process, stimulating the localized oxidation of SS. To improve corrosion protection, a silane-TiO2 sol-gel coating for SS is proposed. SEM showed that the coating reduced bacterial adhesion and EIS study demonstrated that the coating improved the barrier properties and corrosion resistance of 304L SS in TUWW over a short period of immersion.
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Affiliation(s)
- I Ziadi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia; National Institute of Applied Science and Technology (INSAT), Carthage University, Tunis, Tunisia
| | - M M Alves
- CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - M Taryba
- CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - L El-Bassi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia
| | - H Hassairi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia
| | - L Bousselmi
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia
| | - M F Montemor
- CQE, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - H Akrout
- Laboratory for Wastewaters and Environment, Centre of Water Researches and Technologies (CERTE) Technopark of Borj Cedria PB 273, Soliman 8020, Tunisia. @gmail.com
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Alves MM, Andrade SM, Grenho L, Fernandes MH, Santos C, Montemor MF. Influence of apple phytochemicals in ZnO nanoparticles formation, photoluminescence and biocompatibility for biomedical applications. Materials Science and Engineering: C 2019; 101:76-87. [DOI: 10.1016/j.msec.2019.03.084] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 03/21/2019] [Accepted: 03/24/2019] [Indexed: 12/11/2022]
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Abreu AA, Tavares F, Alves MM, Cavaleiro AJ, Pereira MA. Garden and food waste co-fermentation for biohydrogen and biomethane production in a two-step hyperthermophilic-mesophilic process. Bioresour Technol 2019; 278:180-186. [PMID: 30703635 DOI: 10.1016/j.biortech.2019.01.085] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [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: 11/09/2018] [Revised: 01/15/2019] [Accepted: 01/19/2019] [Indexed: 06/09/2023]
Abstract
Co-fermentation of garden waste (GW) and food waste (FW) was assessed in a two-stage process coupling hyperthermophilic dark-fermentation and mesophilic anaerobic digestion (AD). In the first stage, biohydrogen production from individual substrates was tested at different volatile solids (VS) concentrations, using a pure culture of Caldicellulosiruptor saccharolyticus as inoculum. FW concentrations (in VS) above 2.9 g L-1 caused a lag phase of 5 days on biohydrogen production. No lag phase was observed for GW concentrations up to 25.6 g L-1. In the co-fermentation experiments, the highest hydrogen yield (46 ± 1 L kg-1) was achieved for GW:FW 90:10% (w/w). In the second stage, a biomethane yield of 682 ± 14 L kg-1 was obtained using the end-products of GW:FW 90:10% co-fermentation. The energy generation predictable from co-fermentation and AD of GW:FW 90:10% is 0.5 MJ kg-1 and 24.4 MJ kg-1, respectively, which represents an interesting alternative for valorisation of wastes produced locally in communities.
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Affiliation(s)
- A A Abreu
- Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - F Tavares
- Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - M M Alves
- Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
| | - A J Cavaleiro
- Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
| | - M A Pereira
- Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
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20
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Martin V, Ribeiro IA, Alves MM, Gonçalves L, Claudio RA, Grenho L, Fernandes MH, Gomes P, Santos CF, Bettencourt AF. Engineering a multifunctional 3D-printed PLA-collagen-minocycline-nanoHydroxyapatite scaffold with combined antimicrobial and osteogenic effects for bone regeneration. Mater Sci Eng C Mater Biol Appl 2019; 101:15-26. [PMID: 31029308 DOI: 10.1016/j.msec.2019.03.056] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/22/2019] [Accepted: 03/17/2019] [Indexed: 01/06/2023]
Abstract
3D-printing and additive manufacturing can be powerful techniques to design customized structures and produce synthetic bone grafts with multifunctional effects suitable for bone repair. In our work we aimed the development of novel multifunctionalized 3D printed poly(lactic acid) (PLA) scaffolds with bioinspired surface coatings able to reduce bacterial biofilm formation while favoring human bone marrow-derived mesenchymal stem cells (hMSCs) activity. For that purpose, 3D printing was used to prepare PLA scaffolds that were further multifunctionalized with collagen (Col), minocycline (MH) and bioinspired citrate- hydroxyapatite nanoparticles (cHA). PLA-Col-MH-cHA scaffolds provide a closer structural support approximation to native bone architecture with uniform macroporous, adequate wettability and an excellent compressive strength. The addition of MH resulted in an adequate antibiotic release profile that by being compatible with local drug delivery therapy was translated into antibacterial activities against Staphylococcus aureus, a main pathogen associated to bone-related infections. Subsequently, the hMSCs response to these scaffolds revealed that the incorporation of cHA significantly stimulated the adhesion, proliferation and osteogenesis-related gene expression (RUNX2, OCN and OPN) of hMSCs. Furthermore, the association of a bioinspired material (cHA) with the antibiotic MH resulted in a combined effect of an enhanced osteogenic activity. These findings, together with the antibiofilm activity depicted strengthen the appropriateness of this 3D-printed PLA-Col-MH-cHA scaffold for future use in bone repair. By targeting bone repair while mitigating the typical infections associated to bone implants, our 3D scaffolds deliver an integrated strategy with the combined effects further envisaging an increase in the success rate of bone-implanted devices.
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Affiliation(s)
- Victor Martin
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Isabel A Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Marta M Alves
- CQE Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
| | - Lídia Gonçalves
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Ricardo A Claudio
- EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal; IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Liliana Grenho
- Laboratory for Bone Metabolism and Regeneration - Faculty of Dental Medicine, U. Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal
| | - Maria H Fernandes
- Laboratory for Bone Metabolism and Regeneration - Faculty of Dental Medicine, U. Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal
| | - Pedro Gomes
- Laboratory for Bone Metabolism and Regeneration - Faculty of Dental Medicine, U. Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal; LAQV/REQUIMTE, U. Porto, Porto 4160-007, Portugal
| | - Catarina F Santos
- CQE Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal; EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal.
| | - Ana F Bettencourt
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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Marques LM, Alves MM, Eugénio S, Salazar SB, Pedro N, Grenho L, Mira NP, Fernandes MH, Montemor MF. Potential anti-cancer and anti-Candida activity of Zn-derived foams. J Mater Chem B 2018; 6:2821-2830. [PMID: 32254235 DOI: 10.1039/c7tb02726e] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc (Zn)-derived foams have been prepared from an alkaline electrolyte solution by galvanostatic electrodeposition under different conditions. A detailed physico-chemical characterization was performed by Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). A pioneer application of these foams in medical implant-related applications was investigated. The in vitro behaviour of these Zn-derived foams in simulated physiological conditions was studied. The results revealed that the presence of zinc oxide was important enough to change the in vitro behaviour of these materials. The potential of these Zn-derived foams in inhibiting bone cancer cell proliferation - osteoscarcoma cells - and important pathogenic fungi responsible for implant-related infections -Candida albicans- was examined. Furthermore, the foams were evaluated for cytocompatibility with normal human osteoblasts. The results obtained allowed us to conclude that Zn-derived foams have an interesting potential for anti-cancer and anti-Candida activity, targeted for bone-related implant applications, suggesting that this novel material may have potential for further clinical studies.
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Affiliation(s)
- L M Marques
- CQE, Instituto Superior Técnico, Departamento de Engenharia Química, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001, Lisboa, Portugal.
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22
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Alves MM, Bouchami O, Tavares A, Córdoba L, Santos CF, Miragaia M, de Fátima Montemor M. New Insights into Antibiofilm Effect of a Nanosized ZnO Coating against the Pathogenic Methicillin Resistant Staphylococcus aureus. ACS Appl Mater Interfaces 2017; 9:28157-28167. [PMID: 28782933 DOI: 10.1021/acsami.7b02320] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
ZnO nanoparticles (NPs) are arising as promising novel antibiotics toward device-related infections. The surface functionalization of Zn, a novel resorbable biomaterial, with ZnO NPs could present an effective solution to overcome such a threat. In this sense, the antibacterial and antibiofilm activity of nano- and microsized ZnO coatings was studied against clinically relevant bacteria, methicillin resistant Staphylococcus aureus (MRSA). The bacterial viability of planktonic and biofilm cells together with the corresponding biofilm structures revealed that only the nanosized ZnO coating had an antibiofilm effect. To elucidate this effect, a novel approach was taken: preconditioning of bacteria with this ZnO coating followed by exposure to subinhibitory concentrations of antibiotics with well-known modes of actions. This approached revealed (i) a decreased biofilm formation in combination with gentamycin, targeting protein synthesis, and (ii) an increased biofilm formation in the presence of rifampicin and vancomycin, acting on RNA and cell wall biosynthesis, respectively. The increased bacteria resistance to these two antibiotics gave new insights into the antibiofilm effect of this nanosized ZnO coating. The synergistic effect observed for gentamycin opened new perspectives for the design of effective solutions against implant-related infections. During the in vitro degradation of this nanosized ZnO-coated Zn, a specific corrosion product, hopeite [Zn3(PO4)2], was depicted. Interestingly, the increased deposition of hopeite-derived compounds on MRSA cells surface seemed to be related to unhealthy and dead bacterial cells. This observation suggested that hopeite may well play a key role in this antibiofilm activity. The results obtained herein shed light on the possible antibacterial effect of a nanosized ZnO coating, and strengthened its antimicrobial (antibacterial and antifungal) potential, therefore providing a potentially effective material to overcome the growing trend of implant-related infections.
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Affiliation(s)
- Marta M Alves
- CQE, DEQ Instituto Superior Técnico, Universidade de Lisboa , Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Ons Bouchami
- Laboratory of Bacterial Evolution and Molecular Epidemiology, Instituto de Tecnologia Química e Biológica António Xavier, Nova University (ITQB-NOVA) , 2780 Oeiras, Portugal
| | - Ana Tavares
- Laboratory of Bacterial Evolution and Molecular Epidemiology, Instituto de Tecnologia Química e Biológica António Xavier, Nova University (ITQB-NOVA) , 2780 Oeiras, Portugal
| | - Laura Córdoba
- CQE, DEQ Instituto Superior Técnico, Universidade de Lisboa , Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Catarina F Santos
- CQE, DEQ Instituto Superior Técnico, Universidade de Lisboa , Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- EST Setúbal, DEM, Instituto Politécnico de Setúbal , Campus IPS, 2910 Setúbal, Portugal
| | - Maria Miragaia
- Laboratory of Bacterial Evolution and Molecular Epidemiology, Instituto de Tecnologia Química e Biológica António Xavier, Nova University (ITQB-NOVA) , 2780 Oeiras, Portugal
| | - Maria de Fátima Montemor
- CQE, DEQ Instituto Superior Técnico, Universidade de Lisboa , Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Cardoso JMS, Guerreiro SI, Lourenço A, Alves MM, Montemor MF, Mira NP, Leitão JH, Carvalho MFNN. Ag(I) camphorimine complexes with antimicrobial activity towards clinically important bacteria and species of the Candida genus. PLoS One 2017; 12:e0177355. [PMID: 28486529 PMCID: PMC5423651 DOI: 10.1371/journal.pone.0177355] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/26/2017] [Indexed: 01/26/2023] Open
Abstract
The present work follows a previous report describing the antibacterial activity of silver camphorimine complexes of general formula [Ag(NO3)L]. The synthesis and demonstration of the antifungal and antibacterial activity of three novel [Ag(NO3)L] complexes (named 1, 2 and 3) is herein demonstrated. This work also shows for the first time that the previously studied complexes (named 4 to 8) also exert antifungal activity. The antibacterial activity of complexes was evaluated against Staphylococcus aureus, Pseudomonas aeruginosa, Burkholderia contaminans and Escherichia coli strains, while antifungal activity was tested against the Candida species C. albicans, C. glabrata, C. parapsilosis and C. tropicalis. The antimicrobial activity of the complexes ranged from very high (complex 4) to moderate (complex 6) or low (complex 8), depending on the structural and electronic characteristics of the camphorimine ligands. Notably, the highest antibacterial and anti-Candida activities do not coincide in the same complex and in some cases they were even opposite, as is the case of complex 4 which exhibits a high anti-bacterial and low antifungal activity. These distinct results suggest that the complexes may have different mechanisms against prokaryotic and eukaryotic cells. The antifungal activity of the Ag(I) camphorimine complexes (in particular of complex 1) was found to be very high (MIC = 2 μg/mL) against C. parapsilosis, being also registered a prominent activity against C. tropicalis and C. glabrata. None of the tested compounds inhibited C. albicans growth, being this attributed to the ability of these yeast cells to mediate the formation of less toxic Ag nanoparticles, as confirmed by Scanning Electron Microscopy images. The high antibacterial and anti-Candida activities of the here studied camphorimine complexes, especially of complexes 1 and 7, suggests a potential therapeutic application for these compounds.
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Affiliation(s)
- João M. S. Cardoso
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais Lisboa, Portugal
| | - Soraia I. Guerreiro
- iBB—Institute for Bioengineering and Biosciences and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa, Portugal
| | - Andreia Lourenço
- iBB—Institute for Bioengineering and Biosciences and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa, Portugal
| | - Marta M. Alves
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais Lisboa, Portugal
| | - M. Fátima Montemor
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais Lisboa, Portugal
| | - Nuno P. Mira
- iBB—Institute for Bioengineering and Biosciences and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa, Portugal
- * E-mail: (MC); (NM); (JL)
| | - Jorge H. Leitão
- iBB—Institute for Bioengineering and Biosciences and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa, Portugal
- * E-mail: (MC); (NM); (JL)
| | - M. Fernanda N. N. Carvalho
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais Lisboa, Portugal
- * E-mail: (MC); (NM); (JL)
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Alves MM, Prosek T, Santos CF, Montemor MF. In vitro degradation of ZnO flowered coated Zn-Mg alloys in simulated physiological conditions. Materials Science and Engineering: C 2017; 70:112-120. [DOI: 10.1016/j.msec.2016.08.071] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/22/2016] [Accepted: 08/26/2016] [Indexed: 10/21/2022]
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Abstract
Primary reactions occurring upon Zn-derived materials insertion inside an organism are of utmost importance as chemical species resulting from the degradation of resorbable biomaterials are crucial for the interaction with the surrounding tissues.
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Affiliation(s)
- Marta M. Alves
- CQE
- DEQ
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisboa
| | - Tomáš Prošek
- Technopark Kralupy
- The University of Chemistry and Technology in Prague
- 278 01 Kralupy nad Vltavou
- Czech Republic
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Pereira RA, Salvador AF, Dias P, Pereira MFR, Alves MM, Pereira L. Perspectives on carbon materials as powerful catalysts in continuous anaerobic bioreactors. Water Res 2016; 101:441-447. [PMID: 27295618 DOI: 10.1016/j.watres.2016.06.004] [Citation(s) in RCA: 6] [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: 03/17/2016] [Revised: 05/16/2016] [Accepted: 06/02/2016] [Indexed: 06/06/2023]
Abstract
The catalytic effect of commercial microporous activated carbon (AC) and macroporous carbon nanotubes (CNT) is investigated in reductive bioreactions in continuous high rate anaerobic reactors, using the azo dye Acid Orange 10 (AO10) as model compound as electron acceptor and a mixture of VFA as electron donor. Size and concentration of carbon materials (CM) and hydraulic retention time (HRT) are assessed. CM increased the biological reduction rate of AO10, resulting in significantly higher colour removal, as compared to the control reactors. The highest efficiency, 98%, was achieved with a CNT diameter (d) lower than 0.25 mm, at a CNT concentration of 0.12 g per g of volatile solids (VS), a HRT of 10 h and resulted in a chemical oxygen demand (COD) removal of 85%. Reducing the HRT to 5 h, colour and COD removal in CM-mediated bioreactors were above 90% and 80%, respectively. In the control reactor, thought similar COD removal was achieved, AO10 decolourisation was just approximately 20%, demonstrating the ability of CM to significantly accelerate the reduction reactions in continuous bioreactors. AO10 reduction to the correspondent aromatic amines was proved by high performance liquid chromatography (HPLC). Colour decrease in the reactor treating a real effluent with CNT was the double comparatively to the reactor operated without CNT. The presence of AC in the reactor did not affect the microbial diversity, as compared to the control reactor, evidencing that the efficient reduction of AO10 was mainly due to AC rather than attributed to changes in the composition of the microbial communities.
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Affiliation(s)
- R A Pereira
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - A F Salvador
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - P Dias
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - M F R Pereira
- Laboratório de Catálise e Materiais (LCM), Laboratório Associado LSRE/LCM, Departamento de Engenharia Química, Faculdade Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - M M Alves
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - L Pereira
- Centro de Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Alves MM, Cunha DV, Santos CF, Mira NP, Montemor MF. In vitro corrosion behaviour and anti-Candida spp. activity of Zn coated with ZnO-nanostructured 'Anastacia' flowers. J Mater Chem B 2016; 4:4754-4761. [PMID: 32263249 DOI: 10.1039/c6tb00797j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Rejection and colonization by microbes are two problematic issues that often require the surgical removal of medical implants with increased risks for patients. In this work it is shown that functionalization of Zn surfaces with ZnO-nanostructured 'Anastacia' flowers (NAF) resulted in improved biomaterials that can potentially overcome these important drawbacks, which can further boost the use of Zn in biomedical implants. The in vitro degradation of NAF-coated Zn under simulated physiological conditions resulted in the formation of a biomimetic corrosion layer rich in a hydroxyapatite analogue that, being an important bone component, may potentially decrease implant rejection. Colonization of the NAF-coated Zn surface by Candida parapsilosis and Candida albicans, two of the more relevant microbial species colonizing medical devices, was significantly reduced on the NAF-coated Zn surface. The mechanism by which this colonization inhibition occurred was distinct since for C. parapsilosis cells this was attributed to reduced cell viability, while for C. albicans the reduced colonization was related to impaired biofilm formation. This ZnO-derived coating is an expeditious strategy to improve the resilience of Zn-based resorbable biomaterials towards Candida spp. colonization, paving the way for the design of bioactive ZnO-derived coatings with potential for clinical applications on bone.
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Affiliation(s)
- Marta M Alves
- CQE Instituto Superior Técnico, Departamento de Engenharia Química, Universidade de Lisboa, Av. Rovisco Pais 1049-001, Lisboa, Portugal.
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Torroglosa A, Alves MM, Fernández RM, Antiñolo G, Hofstra RM, Borrego S. Epigenetics in ENS development and Hirschsprung disease. Dev Biol 2016; 417:209-16. [PMID: 27321561 DOI: 10.1016/j.ydbio.2016.06.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [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: 03/27/2016] [Revised: 06/10/2016] [Accepted: 06/13/2016] [Indexed: 12/18/2022]
Abstract
Hirschsprung disease (HSCR, OMIM 142623) is a neurocristopathy caused by a failure of the enteric nervous system (ENS) progenitors derived from neural crest cells (NCCs), to migrate, proliferate, differentiate or survive to and within the gastrointestinal tract, resulting in aganglionosis in the distal colon. The formation of the ENS is a complex process, which is regulated by a large range of molecules and signalling pathways involving both the NCCs and the intestinal environment. This tightly regulated process needs correct regulation of the expression of ENS specific genes. Alterations in the expression of these genes can have dramatic consequences. Several mechanisms that control the expression of genes have been described, such as DNA modification (epigenetic mechanisms), regulation of transcription (transcription factor, enhancers, repressors and silencers), post-transcriptional regulation (3'UTR and miRNAs) and regulation of translation. In this review, we focus on the epigenetic DNA modifications that have been described so far in the context of the ENS development. Moreover we describe the changes that are found in relation to the onset of HSCR.
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Affiliation(s)
- A Torroglosa
- Department of Genetics, Reproduction and Fetal Medicine, Institute of Biomedicine of Seville (IBIS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain; Centre for Biomedical Network Research on Rare Diseases (CIBERER), Seville, Spain
| | - M M Alves
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - R M Fernández
- Department of Genetics, Reproduction and Fetal Medicine, Institute of Biomedicine of Seville (IBIS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain; Centre for Biomedical Network Research on Rare Diseases (CIBERER), Seville, Spain
| | - G Antiñolo
- Department of Genetics, Reproduction and Fetal Medicine, Institute of Biomedicine of Seville (IBIS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain; Centre for Biomedical Network Research on Rare Diseases (CIBERER), Seville, Spain
| | - R M Hofstra
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands; Stem Cells and Regenerative Medicine, Birth Defects Research Centre UCL Institute of Child Health, London, UK
| | - S Borrego
- Department of Genetics, Reproduction and Fetal Medicine, Institute of Biomedicine of Seville (IBIS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain; Centre for Biomedical Network Research on Rare Diseases (CIBERER), Seville, Spain.
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Oliveira JV, Alves MM, Costa JC. Optimization of biogas production from Sargassum sp. using a design of experiments to assess the co-digestion with glycerol and waste frying oil. Bioresour Technol 2015; 175:480-5. [PMID: 25459858 DOI: 10.1016/j.biortech.2014.10.121] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/21/2014] [Accepted: 10/24/2014] [Indexed: 06/04/2023]
Abstract
A design of experiments was adopted to assess the optimal conditions for methane production from the macroalgae Sargassum sp. co-digested with glycerol (Gly) and waste frying oil (WFO). Three variables were tested: % total solids of algae (%TSSargassumsp.), co-substrate concentration (gGly/WFOL(-1)), and co-substrate type (Gly or WFO). The biochemical methane potential (BMP) of Sargassum sp. was 181±1L CH4kg(-1) COD. The co-digestion with Gly and WFO increased the BMP by 56% and 46%, respectively. The methane production rate (k), showed similar behaviour as the BMP, increasing 38% and 19% with Gly and WFO, respectively. The higher BMP (283±18L CH4kg(-1) COD) and k (65.9±2.1L CH4kg(-1) CODd(-1)) was obtained in the assay with 0.5% TS and 3.0gGlyL(-1). Co-digestion with glycerol or WFO is a promising process to enhance the BMP from the macroalgae Sargassum sp.
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Affiliation(s)
- J V Oliveira
- CEB-Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - M M Alves
- CEB-Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
| | - J C Costa
- CEB-Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
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Oliveira JV, Alves MM, Costa JC. Design of experiments to assess pre-treatment and co-digestion strategies that optimize biogas production from macroalgae Gracilaria vermiculophylla. Bioresour Technol 2014; 162:323-30. [PMID: 24762762 DOI: 10.1016/j.biortech.2014.03.155] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/21/2014] [Accepted: 03/28/2014] [Indexed: 05/18/2023]
Abstract
A design of experiments was applied to evaluate different strategies to enhance the methane yield of macroalgae Gracilaria vermiculophylla. Biochemical Methane Potential (BMP) of G. vermiculophylla after physical pre-treatment (washing and maceration) reached 481±9 L CH4 kg(-1) VS, corresponding to a methane yield of 79±2%. No significant effects were achieved in the BMP after thermochemical pre-treatment, although the seaweeds solubilisation increased up to 44%. Co-digestion with glycerol or sewage sludge has proved to be effective for increasing the methane production. Addition of 2% glycerol (w:w) increased the BMP by 18%, achieving almost complete methanation of the substrate (96±3%). Co-digestion of seaweed and secondary sludge (15:85%, TS/TS) increased the BMP by 25% (605±4 L CH4 kg(-1) VS) compared to the seaweed individual digestion.
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Affiliation(s)
- J V Oliveira
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - M M Alves
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - J C Costa
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
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Gallardo R, Faria C, Rodrigues LR, Pereira MA, Alves MM. Anaerobic granular sludge as a biocatalyst for 1,3-propanediol production from glycerol in continuous bioreactors. Bioresour Technol 2014; 155:28-33. [PMID: 24413479 DOI: 10.1016/j.biortech.2013.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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: 10/12/2013] [Revised: 11/29/2013] [Accepted: 12/03/2013] [Indexed: 05/07/2023]
Abstract
1,3-Propanediol (1,3-PDO) was produced from glycerol in three parallel Expanded Granular Sludge Blanket (EGSB) reactors inoculated with granular sludge (control reactor-R1), heat-treated granular sludge (R2) and disrupted granular sludge (R3) at hydraulic retention times (HRT) between 3 and 24h. Maximum 1,3-PDO yield (0.52molmol(-1)) and productivity (57gL(-1)d(-1)) were achieved in R1 at HRTs of 12 and 3h, respectively. DGGE profiling of PCR-amplified 16S rRNA gene fragments showed that variations in the HRT had a critical impact in the dominant community of microorganisms. However, no appreciable differences in the bacterial population were observed between R2 and R3 at low HRTs. Production of H2 was observed at the beginning of the operation, but no methane production was observed. This study proves the feasibility of 1,3-PDO production in EGSB reactors and represents a novel strategy to valorise glycerol generated in the biodiesel industry.
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Affiliation(s)
- R Gallardo
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - C Faria
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - L R Rodrigues
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - M A Pereira
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - M M Alves
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
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Costa JC, Mesquita DP, Amaral AL, Alves MM, Ferreira EC. Quantitative image analysis for the characterization of microbial aggregates in biological wastewater treatment: a review. Environ Sci Pollut Res Int 2013; 20:5887-5912. [PMID: 23716077 DOI: 10.1007/s11356-013-1824-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 05/13/2013] [Indexed: 06/02/2023]
Abstract
Quantitative image analysis techniques have gained an undeniable role in several fields of research during the last decade. In the field of biological wastewater treatment (WWT) processes, several computer applications have been developed for monitoring microbial entities, either as individual cells or in different types of aggregates. New descriptors have been defined that are more reliable, objective, and useful than the subjective and time-consuming parameters classically used to monitor biological WWT processes. Examples of this application include the objective prediction of filamentous bulking, known to be one of the most problematic phenomena occurring in activated sludge technology. It also demonstrated its usefulness in classifying protozoa and metazoa populations. In high-rate anaerobic processes, based on granular sludge, aggregation times and fragmentation phenomena could be detected during critical events, e.g., toxic and organic overloads. Currently, the major efforts and needs are in the development of quantitative image analysis techniques focusing on its application coupled with stained samples, either by classical or fluorescent-based techniques. The use of quantitative morphological parameters in process control and online applications is also being investigated. This work reviews the major advances of quantitative image analysis applied to biological WWT processes.
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Affiliation(s)
- J C Costa
- Institute for Biotechnology and Bioengineering (IBB), Centre of Biological Engineering, Universidade do Minho, 4710-057, Braga, Portugal
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Zonta Z, Alves MM, Flotats X, Palatsi J. Modelling inhibitory effects of long chain fatty acids in the anaerobic digestion process. Water Res 2013; 47:1369-80. [PMID: 23276428 DOI: 10.1016/j.watres.2012.12.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 12/03/2012] [Accepted: 12/05/2012] [Indexed: 05/26/2023]
Abstract
Mathematical modelling of anaerobic digestion process has been used to give new insights regarding dynamics of the long chain fatty acids (LCFA) inhibition. Previously published experimental data, including batch tests with clay mineral bentonite additions, were used for parameter identification. New kinetics were considered to describe the bio-physics of the inhibitory process, including: i) adsorption of LCFA over granular biomass and ii) specific LCFA substrate (saturated/unsaturated) and LCFA-degrading populations. Furthermore, iii) a new variable was introduced to describe the state of damage of the acetoclastic methanogens in order to account for the loss of cell-functionality (inhibition) induced by the adsorbed LCFAs. The proposed model modifications are state compatible and easy to be integrated into the International Water Association's Anaerobic Digestion Model N°1 (ADM1) framework. Practical identifiability of model parameters was assessed with a global sensitivity analysis, while calibration and model structure validation were performed on independent data sets. A reliable simulation of the LCFA-inhibition process can be achieved, if the model includes the description of the adsorptive nature of the LCFAs and the LCFA-damage over specific biomass. The importance of microbial population structure (saturated/unsaturated LCFA-degraders) and the high sensitivity of acetoclastic population to LCFA are evidenced, providing a plausible explanation of experimental based hypothesis.
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Affiliation(s)
- Z Zonta
- IRTA, GIRO Joint Research Unit IRTA-UPC, Torre Marimon, E-08140 Caldes de Montbui, Barcelona, Spain
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Cavaleiro AJ, Ferreira T, Pereira F, Tommaso G, Alves MM. Biochemical methane potential of raw and pre-treated meat-processing wastes. Bioresour Technol 2013; 129:519-525. [PMID: 23266854 DOI: 10.1016/j.biortech.2012.11.083] [Citation(s) in RCA: 8] [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: 06/25/2012] [Revised: 11/17/2012] [Accepted: 11/19/2012] [Indexed: 06/01/2023]
Abstract
Raw and pre-treated greaves and rinds, two meat-processing wastes, were assessed for biochemical methane potential (BMP). Combinations of temperature (25, 55, 70 and 120 °C), NaOH (0.3 g g(-1) waste volatile solids) and lipase from Candida rugosa (10 U g(-1) fat) were applied to promote wastes hydrolysis, and the effect on BMP was evaluated. COD solubilisation was higher (66% for greaves; 55% for rinds) when greaves were pre-treated with NaOH at 55 °C and lipase was added to rinds after autoclaving. Maximum fat hydrolysis (52-54%) resulted from NaOH addition, at 55 °C for greaves and 25 °C for rinds. BMP of raw greaves and rinds was 707±46 and 756±56 L CH4 (at standard temperature and pressure) kg(-1)VS, respectively. BMP of rinds improved 25% by exposure to 70 °C; all other strategies tested had no positive effect on BMP of both wastes, and anaerobic biodegradability was even reduced by the combined action of base and temperature.
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Affiliation(s)
- A J Cavaleiro
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Pozdniakova TA, Costa JC, Santos RJ, Alves MM, Boaventura RAR. Anaerobic biodegradability of Category 2 animal by-products: methane potential and inoculum source. Bioresour Technol 2012; 124:276-282. [PMID: 22989655 DOI: 10.1016/j.biortech.2012.08.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 08/03/2012] [Accepted: 08/06/2012] [Indexed: 06/01/2023]
Abstract
Category 2 animal by-products that need to be sterilized with steam pressure according Regulation (EC) 1774/2002 are studied. In this work, 2 sets of experiments were performed in mesophilic conditions: (i) biomethane potential determination testing 0.5%, 2.0% and 5.0% total solids (TS), using sludge from the anaerobic digester of a wastewater treatment plant as inoculum; (ii) biodegradability tests at a constant TS concentration of 2.0% and different inoculum sources (digested sludge from a wastewater treatment plant; granular sludge from an upflow anaerobic sludge blanket reactor; leachate from a municipal solid waste landfill; and sludge from the slaughterhouse wastewater treatment anaerobic lagoon) to select the more adapted inoculum to the substrate in study. The higher specific methane production was of 317 mL CH(4)g(-1) VS(substrate) for 2.0% TS. The digested sludge from the wastewater treatment plant led to the lowest lag-phase period and higher methane potential rate.
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Affiliation(s)
- Tatiana A Pozdniakova
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
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Palatsi J, Affes R, Fernandez B, Pereira MA, Alves MM, Flotats X. Influence of adsorption and anaerobic granular sludge characteristics on long chain fatty acids inhibition process. Water Res 2012; 46:5268-5278. [PMID: 22841596 DOI: 10.1016/j.watres.2012.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 07/04/2012] [Accepted: 07/06/2012] [Indexed: 06/01/2023]
Abstract
The impact of LCFA adsorption on the methanogenic activity was evaluated in batch assays for two anaerobic granular sludges in the presence and absence of bentonite as synthetic adsorbent. A clear inhibitory effect at an oleate (C18:1) concentration of 0.5 g(C18:1) L(-1) was observed for both sludges. Palmitate (C16:0) was confirmed to be the main intermediate of C18:1 degradation in not adapted sludge and its accumulation was further evidenced by fluorescence staining and microscopy techniques. LCFA inhibition could be decreased by the addition of bentonite, reducing the lag-phase and accelerating the kinetics of LCFA degradation, concluding in the importance of the adsorptive nature of the LCFA inhibitory process. Granule morphology and molecular profiling of predominant microorganisms revealed that biomass adaptation to LCFA could modify the intermediates accumulation profiles and process rates.
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Affiliation(s)
- J Palatsi
- IRTA, GIRO Joint Research Unit IRTA-UPC, Torre Marimon, E-08140 Caldes de Montbui, Barcelona, Spain.
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Eiroa M, Costa JC, Alves MM, Kennes C, Veiga MC. Evaluation of the biomethane potential of solid fish waste. Waste Manag 2012; 32:1347-1352. [PMID: 22520161 DOI: 10.1016/j.wasman.2012.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 03/15/2012] [Accepted: 03/21/2012] [Indexed: 05/31/2023]
Abstract
Manufacturing processes in fish canning industries generate a considerable amount of solid waste that can be digested anaerobically. The aim of this research was to study the biochemical methane potential of different solid fish waste. For tuna, sardine and needle fish waste, around 0.47g COD-CH(4)/g COD(added) was obtained in batch experiments with 1%TS; whereas for mackerel waste, the methane production attained 0.59g COD-CH(4)/g COD(added). The increase in the waste/inoculum ratio, from 1.1-1.3 to 2.8-3.3g VS(waste)/g VS(inoculum), led to overload due to VFA and LCFA accumulation. Afterward, co-digestion assays of fish waste with gorse were undertaken but the biochemical methane potential did not improve.
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Affiliation(s)
- M Eiroa
- Chemical Engineering Laboratory, Faculty of Sciences, University of A Coruña, Rúa da Fraga n°. 10, 15008 A Coruña, Spain
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Costa JC, Gonçalves PR, Nobre A, Alves MM. Biomethanation potential of macroalgae Ulva spp. and Gracilaria spp. and in co-digestion with waste activated sludge. Bioresour Technol 2012; 114:320-326. [PMID: 22459959 DOI: 10.1016/j.biortech.2012.03.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 03/02/2012] [Accepted: 03/02/2012] [Indexed: 05/31/2023]
Abstract
Biochemical methane potential of four species of Ulva and Gracilaria genus was assessed in batch assays at mesophilic temperature. The results indicate a higher specific methane production (per volatile solids) for one of the Ulva sp. compared with other macroalgae and for tests running with 2.5% of total solids (196±9 L CH(4) kg(-1)VS). Considering that macroalgae can potentially be a post treatment of municipal wastewater for nutrients removal, co-digestion of macroalgae with waste activated sludge (WAS) was assessed. The co-digestion of macroalgae (15%) with WAS (85%) is feasible at a rate of methane production 26% higher than WAS alone without decreasing the overall biodegradability of the substrate (42-45% methane yield). The use of anoxic marine sediment as inoculum had no positive effect on the methane production in batch assays. The limiting step of the overall anaerobic digestion process was the hydrolysis.
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Affiliation(s)
- J C Costa
- IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, 4710-057 Braga, Portugal.
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Costa JC, Barbosa SG, Alves MM, Sousa DZ. Thermochemical pre- and biological co-treatments to improve hydrolysis and methane production from poultry litter. Bioresour Technol 2012; 111:141-147. [PMID: 22391589 DOI: 10.1016/j.biortech.2012.02.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 02/06/2012] [Accepted: 02/10/2012] [Indexed: 05/31/2023]
Abstract
The biochemical methane potential (BMP) of raw poultry litter waste was assessed in batch assays. Biological co-treatment with Clostridium cellulolyticum, Caldicellulosiruptor saccharolyticum and Clostridium thermocellum as bioaugmentation strains, and thermochemical pre-treatments with lime and sodium hydroxide performed at different temperatures and pressures were applied as strategies to improve the BMP by favouring the hydrolysis of the cellulolytic material in the waste. Anaerobic digestion of the raw waste allowed a specific methane production of 145 ± 14 LCH(4)kg(-1)VS, with 1% total solids and 0.72 g VS(inoculum)g(-1)VS(waste). The pre- and co-treatments contributed to a significant increase (up to 74%) in the waste solubilisation when using C. saccharolyticum, but methane production did not improve considerably. Therefore, the conversion of soluble organic matter to methane was the limiting step of the anaerobic digestion process of poultry litter waste.
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Affiliation(s)
- J C Costa
- Institute for Biotechnology and Bioengineering (IBB), Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
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Gonçalves MR, Costa JC, Marques IP, Alves MM. Strategies for lipids and phenolics degradation in the anaerobic treatment of olive mill wastewater. Water Res 2012; 46:1684-1692. [PMID: 22244970 DOI: 10.1016/j.watres.2011.12.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 12/18/2011] [Accepted: 12/19/2011] [Indexed: 05/31/2023]
Abstract
Strategies are proposed for the anaerobic treatment of lipid and phenolic-rich effluents, specifically the raw olive mill wastewater (OMW). Two reactors were operated under OMW influent concentrations from 5 to 48 g COD L(-1) and Hydraulic Retention Time between 10 and 5 days. An intermittent feeding was applied whenever the reactors showed a severe decay in the methane yield. This strategy improved the mineralization of oleate and palmitate, which were the main accumulated Long-Chain Fatty Acids (LCFA), and also promoted the removal of resilient phenolic compounds, reaching remarkable removal efficiencies of 60% and 81% for two parallel reactors at the end of a feed-less period. A maximum biogas production of 1.4m(3)m(-3)d(-1) at an Organic Loading Rate of 4.8 kg COD m(-3)d(-1) was obtained. Patterns of individual LCFA oxidation during the OMW anaerobic digestion are presented and discussed for the first time. The supplementation of a nitrogen source boosted immediately the methane yield from 21 and 18 to 76 and 93% in both reactors. The typical problems of sludge flotation and washout during the anaerobic treatment of this oily wastewater were overcome by biomass retention, according to the Inverted Anaerobic Sludge Blanket (IASB) reactor concepts. This work demonstrates that it is possible to avoid a previous detoxification step by implementing adequate operational strategies to the anaerobic treatment of OMW.
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Affiliation(s)
- M R Gonçalves
- Institute for Biotechnology and Bioengineering (IBB), University of Minho, 4710-057 Braga, Portugal
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Pereira L, Pereira R, Pereira MFR, van der Zee FP, Cervantes FJ, Alves MM. Thermal modification of activated carbon surface chemistry improves its capacity as redox mediator for azo dye reduction. J Hazard Mater 2010; 183:931-9. [PMID: 20800966 DOI: 10.1016/j.jhazmat.2010.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 07/20/2010] [Accepted: 08/02/2010] [Indexed: 05/05/2023]
Abstract
The surface chemistry of a commercial AC (AC(0)) was selectively modified, without changing significantly its textural properties, by chemical oxidation with HNO(3) (AC(HNO3)) and O(2) (AC(O2)), and thermal treatments under H(2) (AC(H2)) or N(2) (AC(N2)) flow. The effect of modified AC on anaerobic chemical dye reduction was assayed with sulphide at different pH values 5, 7 and 9. Four dyes were tested: Acid Orange 7, Reactive Red 2, Mordant Yellow 10 and Direct Blue 71. Batch experiments with low amounts of AC (0.1 g L(-1)) demonstrated an increase of the first-order reduction rate constants, up to 9-fold, as compared with assays without AC. Optimum rates were obtained at pH 5 except for MY10, higher at pH 7. In general, rates increased with increasing the pH of point zero charge (pH(pzc)), following the trend AC(HNO3) < AC(O2) < AC(0) < AC(N2) < AC(H2). The highest reduction rate was obtained for MY10 with AC(H2) at pH 7, which corresponded to the double, as compared with non-modified AC. In a biological system using granular biomass, AC(H2) also duplicated and increase 4.5-fold the decolourisation rates of MY10 and RR2, respectively. In this last experiment, reaction rate was independent of AC concentration in the tested range 0.1-0.6 g L(-1).
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Affiliation(s)
- L Pereira
- Instituto Biotecnologia e Bioengenharia, Centro Engenharia Biológica, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Cavaleiro AJ, Sousa DZ, Alves MM. Methane production from oleate: assessing the bioaugmentation potential of Syntrophomonas zehnderi. Water Res 2010; 44:4940-4947. [PMID: 20696454 DOI: 10.1016/j.watres.2010.07.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 07/02/2010] [Accepted: 07/13/2010] [Indexed: 05/29/2023]
Abstract
The potential for improving long-chain fatty acids (LCFA) conversion to methane was evaluated by bioaugmenting a non-acclimated anaerobic granular sludge with Syntrophomonas zehnderi. Batch bioaugmentation assays were performed with and without the solid microcarrier sepiolite, using 1 mM oleate as sole carbon and energy source. When S. zehnderi was added to the anaerobic sludge methane production from oleate was faster. High methane yields, i.e. 89 ± 5% and 72 ± 1%, were observed in bioaugmented assays in the absence and presence of sepiolite, respectively. Sepiolite stimulated a faster methane production from oleate and prevented the accumulation of acetate. Acetoclastic activity was affected by oleate in the absence of sepiolite, where methane production rate was 26% lower than in assays with microcarrier.
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Affiliation(s)
- A J Cavaleiro
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Neves L, Oliveira R, Alves MM. Fate of LCFA in the co-digestion of cow manure, food waste and discontinuous addition of oil. Water Res 2009; 43:5142-5150. [PMID: 19846190 DOI: 10.1016/j.watres.2009.08.013] [Citation(s) in RCA: 10] [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: 05/26/2009] [Revised: 08/07/2009] [Accepted: 08/10/2009] [Indexed: 05/26/2023]
Abstract
Different concentrations of oily waste were added in a discontinuous mode and recurrently to anaerobic continuous stirred tank reactors fed with cow manure and food waste. Four continuous stirred tank reactors were run in parallel. A control reactor (R1) received no additional oil and R2, R3 and R4 received increasing concentrations of oil in two different experimental approaches. First, the lipids composition was forced to change suddenly, in three moments, without changing the total chemical oxygen demand (COD) fed to the reactors. The only long chain fatty acid (LCFA) detected onto the R1 solid matrix was palmitic acid (C16:0). Nevertheless in the solid matrix of R2, R3 and R4C16:0 and stearic acid were detected. For occasional increase in the oil concentration up to 7.7gCOD(oil)/L(reactor) (55% Oil(COD)/Total(COD)) no statistical differences were detected between the reactors, in terms of methane production, effluent soluble COD, effluent volatile fatty acids and total and volatile solids removal. Therefore this experiment allowed to conclude that cow manure-food waste co-digestion presents sufficient buffer capacity to endure solid-associated LCFA concentration up to 20-25gCOD-LCFA/kgTS. In a second experiment higher concentrations of oil were added, raising occasionally the concentration in the reactors to 9, 12, 15 and 18gCOD(oil)/L(reactor). All pulses had a positive effect in methane production, with the exception of the highest oil pulse concentration, that persistently impaired the reactor performance. This experiment demonstrates that threshold values for LCFA and C16:0 accumulation onto the solid matrix, of about 180-220gCOD-LCFA/kgTS and 120-150gCOD-C16:0/kgTS, should not be surpassed in order to prevent persistent reactor failure, as occurs in some full scale co-digestion plants.
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Affiliation(s)
- L Neves
- IBB - Institute for Biotechnology and Bioengineering, Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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44
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Costa JC, Moita I, Ferreira EC, Alves MM. Morphology and physiology of anaerobic granular sludge exposed to an organic solvent. J Hazard Mater 2009; 167:393-398. [PMID: 19201091 DOI: 10.1016/j.jhazmat.2008.12.130] [Citation(s) in RCA: 3] [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] [Received: 07/07/2008] [Revised: 11/25/2008] [Accepted: 12/31/2008] [Indexed: 05/27/2023]
Abstract
The use of quantitative image analysis techniques, together with physiological information might be used to monitor and detect operational problems in advance to reactor performance failure. Industrial organic solvents, such as White Spirit, are potentially harmful to granular sludge. In preliminary batch assays, 33 mg L(-1) of solvent caused 50% relative biomass activity loss. In an expanded granular sludge blanket reactor fed with 40 mg L(-1) of solvent, during 222h, the reactor performance seemed to be unaffected, presenting COD removal efficiency consistently >95%. However, in the last days of exposure, the biogas production and the methane content were inhibited. Afterwards, already during recovery phase, the COD removal efficiency decreased to 33%, probably because the reactor was underloaded and the biomass became saturated in solvent only at this stage. In the first hours of exposure the specific acetoclastic and the specific hydrogenotrophic methanogenic activities decreased 29% and 21%, respectively. The % of aggregates projected area with equivalent diameter (D(eq))>1mm decreased from 81% to 53%. The mean D(eq) of the aggregates > or =0.2mm decreased, as well as the settling velocity, showing that the granules experienced fragmentation phenomenon caused by the solvent shock load. The ratio between total filaments length and total aggregates projected area (LfA) increased 2 days before effluent volatile suspended solids, suggesting that LfA could be an early-warning indicator of washout events.
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Affiliation(s)
- J C Costa
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Braga, Portugal
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Neves L, Oliveira R, Alves MM. Co-digestion of cow manure, food waste and intermittent input of fat. Bioresour Technol 2009; 100:1957-1962. [PMID: 19046878 DOI: 10.1016/j.biortech.2008.10.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 10/15/2008] [Accepted: 10/16/2008] [Indexed: 05/27/2023]
Abstract
Pulses of oil were added to completely mixed reactors fed with dairy cow manure and food waste, after achieving a stable performance at an organic loading rate of 4.6+/-0.1gCOD/(l(reactor) day), an oily waste effluent from a canned fish processing industry was fed in the form of pulses. The oil concentration rose up to 9, 12, 15 and 18gCOD(oil)/l(reactor,) after the pulse feeding in the reactor. The highest fat concentration of 18gCOD(oil)/l(reactor) promoted a persistent inhibition in the process of the continuous reactor, although in batch assays, the reactor content evidenced a capacity to degrade more oil and to degrade the accumulated organic matter. All the other pulses had a positive effect in the methane production. From a practical point of view, this work demonstrates that controlled intermittent inputs of oil can enhance the methane production in a co-digestion of cow manure and food waste.
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Affiliation(s)
- L Neves
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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46
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Costa JC, Alves MM, Ferreira EC. Principal component analysis and quantitative image analysis to predict effects of toxics in anaerobic granular sludge. Bioresour Technol 2009; 100:1180-1185. [PMID: 18938073 DOI: 10.1016/j.biortech.2008.09.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 08/28/2008] [Accepted: 09/03/2008] [Indexed: 05/26/2023]
Abstract
Principal component analysis (PCA) was applied to datasets gathering morphological, physiological and reactor performance information, from three toxic shock loads (SL1 - 1.6 mg(detergent)/L; SL2 - 3.1mg(detergent)/L; SL3 - 40 mg(solvent)/L) applied in an expanded granular sludge bed (EGSB) reactor. The PCA allowed the visualization of the main effects caused by the toxics, by clustering the samples according to its operational phase, exposure or recovery. The aim was to investigate the variables or group of variables that mostly contribute for the early detection of operational problems. The morphological parameters showed to be sensitive enough to detect the operational problems even before the COD removal efficiency decreased. As observed by the high loadings in the plane defined by the first and second principal components. PCA defined a new latent variable t[1], gathering the most relevant variability in dataset, that showed an immediate variation after the toxics were fed to the reactors. t[1] varied 262%, 254% and 80%, respectively, in SL1, SL2 and SL3. The high loadings/weights of the morphological parameters associated with this new variable express its influence in shock load monitoring and control, and consequently in operational problems recognition.
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Affiliation(s)
- J C Costa
- Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Braga, Portugal
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47
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Neves L, Pereira MA, Mota M, Alves MM. Detection and quantification of long chain fatty acids in liquid and solid samples and its relevance to understand anaerobic digestion of lipids. Bioresour Technol 2009; 100:91-96. [PMID: 18664407 DOI: 10.1016/j.biortech.2008.06.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2007] [Revised: 06/09/2008] [Accepted: 06/10/2008] [Indexed: 05/26/2023]
Abstract
A method for long chain fatty acids (LCFA) extraction, identification and further quantification by gas chromatography was developed and its application to liquid and solid samples collected from anaerobic digesters was demonstrated. After validation, the usefulness of this method was demonstrated in a cow manure digester receiving pulses of an industrial effluent containing high lipid content. From the LCFA analysis data it was showed that the conversion of oleic acid, the main LCFA fed to the reactor, by the adapted biomass became faster and more effective along the successive pulses. Conversely, the accumulation of palmitic acid in the solid phase suggests that degradation of this LCFA, under these conditions, is less effective.
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Affiliation(s)
- L Neves
- Institute for Biotechnology and Bioengineering, Center of Biological Engineering, University of Minho, Campus de Gualtar, Braga, Portugal
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Gonçalves M, Alves MM, Correia JP, Marques IP. Electrooxidation as the anaerobic pre-treatment of fats: oleate conversion using RuO2 and IrO2 based anodes. Bioresour Technol 2008; 99:8207-8211. [PMID: 18448332 DOI: 10.1016/j.biortech.2008.03.022] [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] [Received: 09/28/2006] [Revised: 03/10/2008] [Accepted: 03/11/2008] [Indexed: 05/26/2023]
Abstract
Electrochemical treatment of oleate using RuO2 and IrO2 type dimensionally stable anodes in alkaline medium was performed to develop a feasible anaerobic pre-treatment of fatty effluents. The results showed that the pre-treated solutions over RuO2 were faster degraded by anaerobic consortium than the raw oleate solutions or the electrolysed solutions using IrO2. In batch experiments carried out with pre-treated solutions over RuO2 (100-500mg/L), no lag phases were observed before the methane production onset. On the other hand, raw oleate and pre-treated oleate over IrO2 had originated lag phases of 0-140 and 0-210h, respectively. This study demonstrated that it is advantageous to apply the electrochemical treatment carried out on the RuO2 type DSA in order to achieve a faster biodegradation of lipid-containing effluent and consequently to obtain a faster methane production.
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Affiliation(s)
- M Gonçalves
- Dept. Energias Renováveis, INETI, Est. Paço do Lumiar, 1649-038 Lisboa, Portugal.
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Harrelkas F, Paulo A, Alves MM, El Khadir L, Zahraa O, Pons MN, van der Zee FP. Photocatalytic and combined anaerobic-photocatalytic treatment of textile dyes. Chemosphere 2008; 72:1816-1822. [PMID: 18585754 DOI: 10.1016/j.chemosphere.2008.05.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Revised: 05/13/2008] [Accepted: 05/16/2008] [Indexed: 05/26/2023]
Abstract
A photocatalytic process based on immobilized titanium dioxide was used to treat crude solutions of azo, anthraquinone and phthalocyanine textile dyes. In addition, the process was applied to the treat autoxidized chemically reduced azo dyes, i.e. representatives of recalcitrant dye residues after biological sequential anaerobic-aerobic treatment. Photocatalysis was able to remove more than 90% color from crude as well as autoxidized chemically reduced dye solutions. UV-absorbance and COD were also removed but to a lower extent (50% in average). The end products of photocatalytic treatment were not toxic toward methanogenic bacteria. The results demonstrate that photocatalysis can be used as a pre- or post-treatment method to biological anaerobic treatment of dye-containing textile wastewater.
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Affiliation(s)
- F Harrelkas
- Laboratoire des Sciences du Génie Chimique, CNRS, Nancy University, INPL, 1 Rue Grandville, BP 20451, 54001 Nancy Cedex, France
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50
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Abstract
This paper reviews recent results obtained on long-chain fatty acids (LCFA) anaerobic degradation. Two LCFA were used as model substrates: oleate, a mono-unsaturated LCFA, and palmitate, a saturated LCFA, both abundant in LCFA-rich wastewaters. 16S rRNA gene analysis of sludge samples submitted to continuous oleate- and palmitate-feeding followed by batch degradation of the accumulated LCFA demonstrated that bacterial communities were dominated by members of the Clostridiaceae and Syntrophomonadaceae families. Archaeal populations were mainly comprised of hydrogen-consuming microorganisms belonging to the genus Methanobacterium, and acetate-utilizers from the genera Methanosaeta and Methanosarcina. Enrichment cultures growing on oleate and palmitate, in the absence or presence of sulfate, gave more insight into the major players involved in the degradation of unsaturated and saturated LCFA. Syntrophomonas-related species were identified as predominant microorganisms in all the enrichment cultures. Microorganisms clustering within the family Syntrophobacteraceae were identified in the methanogenic and sulfate-reducing enrichments growing on palmitate. Distinct bacterial consortia were developed in oleate and palmitate enrichments, and observed differences might be related to the different degrees of saturation of these two LCFA. A new obligately syntrophic bacterium, Syntrophomonas zehnderi, was isolated from an oleate-degrading culture and its presence in oleate-degrading sludges detected by 16S rRNA gene cloning and sequencing.
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Affiliation(s)
- D Z Sousa
- Institute for Biotechnology and Bioengineering, Center for Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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