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Almeida D, Dias M, Teixeira B, Frazão C, Almeida M, Gonçalves G, Oliveira M, Pinto RJB. Optimized Synthesis of Poly(Lactic Acid) Nanoparticles for the Encapsulation of Flutamide. Gels 2024; 10:274. [PMID: 38667693 PMCID: PMC11049099 DOI: 10.3390/gels10040274] [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: 03/23/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Biopolymeric nanoparticles (NPs) have gained significant attention in several areas as an alternative to synthetic polymeric NPs due to growing environmental and immunological concerns. Among the most promising biopolymers is poly(lactic acid) (PLA), with a reported high degree of biocompatibility and biodegradability. In this work, PLA NPs were synthesized according to a controlled gelation process using a combination of single-emulsion and nanoprecipitation methods. This study evaluated the influence of several experimental parameters for accurate control of the PLA NPs' size distribution and aggregation. Tip sonication (as the stirring method), a PLA concentration of 10 mg/mL, a PVA concentration of 2.5 mg/mL, and low-molecular-weight PLA (Mw = 5000) were established as the best experimental conditions to obtain monodisperse PLA NPs. After gelification process optimization, flutamide (FLU) was used as a model drug to evaluate the encapsulation capability of the PLA NPs. The results showed an encapsulation efficiency of 44% for this cytostatic compound. Furthermore, preliminary cell viability tests showed that the FLU@PLA NPs allowed cell viabilities above 90% up to a concentration of 20 mg/L. The comprehensive findings showcase that the PLA NPs fabricated using this straightforward gelification method hold promise for encapsulating cytostatic compounds, offering a novel avenue for precise drug delivery in cancer therapy.
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Affiliation(s)
- Duarte Almeida
- TEMA—Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; (D.A.); (G.G.)
- Intelligent Systems Associate Laboratory (LASI), 4800-058 Guimarães, Portugal
| | - Mariana Dias
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;
| | - Beatriz Teixeira
- CESAM—Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; (B.T.); (C.F.); (M.A.)
| | - Carolina Frazão
- CESAM—Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; (B.T.); (C.F.); (M.A.)
| | - Mónica Almeida
- CESAM—Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; (B.T.); (C.F.); (M.A.)
| | - Gil Gonçalves
- TEMA—Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; (D.A.); (G.G.)
- Intelligent Systems Associate Laboratory (LASI), 4800-058 Guimarães, Portugal
| | - Miguel Oliveira
- CESAM—Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; (B.T.); (C.F.); (M.A.)
| | - Ricardo J. B. Pinto
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;
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2
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Carvalho T, Bártolo R, Pedro SN, Valente BFA, Pinto RJB, Vilela C, Shahbazi MA, Santos HA, Freire CSR. Injectable Nanocomposite Hydrogels of Gelatin-Hyaluronic Acid Reinforced with Hybrid Lysozyme Nanofibrils-Gold Nanoparticles for the Regeneration of Damaged Myocardium. ACS Appl Mater Interfaces 2023. [PMID: 37200222 DOI: 10.1021/acsami.3c03874] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Biopolymeric injectable hydrogels are promising biomaterials for myocardial regeneration applications. Besides being biocompatible, they adjust themselves, perfectly fitting the surrounding tissue. However, due to their nature, biopolymeric hydrogels usually lack desirable functionalities, such as antioxidant activity and electrical conductivity, and in some cases, mechanical performance. Protein nanofibrils (NFs), such as lysozyme nanofibrils (LNFs), are proteic nanostructures with excellent mechanical performance and antioxidant activity, which can work as nanotemplates to produce metallic nanoparticles. Here, gold nanoparticles (AuNPs) were synthesized in situ in the presence of LNFs, and the obtained hybrid AuNPs@LNFs were incorporated into gelatin-hyaluronic acid (HA) hydrogels for myocardial regeneration applications. The resulting nanocomposite hydrogels showed improved rheological properties, mechanical resilience, antioxidant activity, and electrical conductivity, especially for the hydrogels containing AuNPs@LNFs. The swelling and bioresorbability ratios of these hydrogels are favorably adjusted at lower pH levels, which correspond to the ones in inflamed tissues. These improvements were observed while maintaining important properties, namely, injectability, biocompatibility, and the ability to release a model drug. Additionally, the presence of AuNPs allowed the hydrogels to be monitorable through computer tomography. This work demonstrates that LNFs and AuNPs@LNFs are excellent functional nanostructures to formulate injectable biopolymeric nanocomposite hydrogels for myocardial regeneration applications.
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Affiliation(s)
- Tiago Carvalho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Raquel Bártolo
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen, University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Sónia N Pedro
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Bruno F A Valente
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Ricardo J B Pinto
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Carla Vilela
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Mohammad-Ali Shahbazi
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen, University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Hélder A Santos
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands
- W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen, University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Carmen S R Freire
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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Lameirinhas NS, Teixeira MC, Carvalho JPF, Valente BFA, Pinto RJB, Oliveira H, Luís JL, Pires L, Oliveira JM, Vilela C, Freire CSR. Nanofibrillated cellulose/gellan gum hydrogel-based bioinks for 3D bioprinting of skin cells. Int J Biol Macromol 2023; 229:849-860. [PMID: 36572084 DOI: 10.1016/j.ijbiomac.2022.12.227] [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: 11/15/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022]
Abstract
The development of suitable bioinks is an important research topic in the field of three-dimensional (3D) bioprinting. Herein, novel hydrogel-based bioinks composed of nanofibrillated cellulose (NFC) and gellan gum (GG) in different NFC/GG mass proportions (90:10, 80:20, 70:30, and 60:40) were developed and characterized. The increase in the content of GG, as well as its combination with NFC, enhanced their rheological properties, increasing both storage (G') and loss (G") moduli and the G' recovery capacity of the hydrogels (from 70.05 ± 3.06 % (90:10) to 82.63 ± 1.21 % (60:40)), as well as their mechanical properties, increasing the compressive stiffness and stress from 114.02 ± 10.93 Pa (90:10) to 337.16 ± 34.03 Pa (60:40) and from 18.27 ± 1.32 kPa (90:10) to 47.17 ± 3.59 kPa (60:40), respectively. The hydrogels were non-cytotoxic against human keratinocyte cells (HaCaT), with cell viabilities above 70 % for up to 72 h. The hydrogel 60:40 was loaded with HaCaT cells (3 × 106 cells mL-1) and bioprinted. The cell viability was maintained elevated until day 7 (90 ± 3 %) after bioprinting. These results highlight that the combination of these two biopolymers was a good strategy for the development of novel hydrogel-based bioinks for extrusion 3D bioprinting applications.
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Affiliation(s)
- Nicole S Lameirinhas
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Maria C Teixeira
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - João P F Carvalho
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bruno F A Valente
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ricardo J B Pinto
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Helena Oliveira
- CESAM Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Jorge L Luís
- School of Design, Management and Production Technologies Northern Aveiro, ESAN, Portugal
| | - Liliana Pires
- School of Design, Management and Production Technologies Northern Aveiro, ESAN, Portugal
| | - José M Oliveira
- School of Design, Management and Production Technologies Northern Aveiro, ESAN, Portugal
| | - Carla Vilela
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carmen S R Freire
- CICECO Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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Silva FM, Pinto RJB, Barros-Timmons A, Freire CSR. Solventless Photopolymerizable Paper Coating Formulation for Packaging Applications. Polymers (Basel) 2023; 15:polym15051069. [PMID: 36904310 PMCID: PMC10005472 DOI: 10.3390/polym15051069] [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: 01/16/2023] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/24/2023] Open
Abstract
Nowadays, packaging applications require the use of advanced materials as well as production methods that have a low environmental impact. In this study, a solvent-free photopolymerizable paper coating was developed using two acrylic monomers (2-ethylhexyl acrylate and isobornyl methacrylate). A copolymer, with a molar ratio of 2-ethylhexyl acrylate/isobornyl methacrylate of 0.64/0.36, was prepared and used as the main component of the coating formulations (50 and 60 wt%). A mixture of the monomers with the same proportion was used as a reactive solvent, yielding formulations with 100% solids. The coated papers showed an increase in the pick-up values from 6.7 to 32 g/m2 depending on the formulation used and the number of coating layers (up to two). The coated papers maintained their mechanical properties and presented improved air barrier properties (Gurley's air resistivity of ≈25 s for the higher pick-up values). All the formulations promoted a significant increase in the paper's water contact angle (all higher than 120 °) and a remarkable decrease in their water absorption (Cobb values decrease from 108 to 11 g/m2). The results confirm the potential of these solventless formulations for fabricating hydrophobic papers with potential application in packaging, following a quick, effective, and more sustainable approach.
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Guedes G, Wang S, Fontana F, Figueiredo P, Lindén J, Correia A, Pinto RJB, Hietala S, Sousa FL, Santos HA. Dual-Crosslinked Dynamic Hydrogel Incorporating {Mo 154 } with pH and NIR Responsiveness for Chemo-Photothermal Therapy. Adv Mater 2021; 33:e2007761. [PMID: 34382257 DOI: 10.1002/adma.202007761] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 05/04/2021] [Indexed: 06/13/2023]
Abstract
Polyoxometalates are an emerging class of molecular clusters, with well-defined structures and chemical compositions that are produced through simple, low-cost, and highly reproducible methods. In particular, the wheel-shaped cluster {Mo154 } is a promising photothermal agent due to its intervalence charge transfer transitions. However, its toxicity hinders its systemic administration, being the development of a localized delivery system still incipient. Herein, an injectable and self-healing hydrogel of easy preparation and administration is developed, incorporating both {Mo154 } and doxorubicin for synergistic photothermal and chemotherapy applications. The hydrogel is composed of benzylaldehyde functionalized polyethylene glycol, poly(N-isopropylacrylamide) functionalized chitosan and {Mo154 }. The gelation occurs within 60 s at room temperature, and the dual crosslinking by Schiff base and electrostatic interactions generates a dynamic network, which enables self-healing after injection. Moreover, the hydrogel delivers chemotherapeutic drugs, with a release triggered by dual near infra-red (NIR) radiation and pH changes. This stimuli-responsive release system along with the photothermal conversion ability of the hydrogel allows the simultaneous combination of photothermal and chemotherapy. This synergic system efficiently ablates the cancer tumor in vivo with no systemic toxicity. Overall, this work paves the way for the development of novel {Mo154 }-based systems, incorporated in self-healing and injectable hydrogels for dual chemo-photothermal therapy.
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Affiliation(s)
- Gabriela Guedes
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
- Chemistry Department, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
- CICECO-Aveiro Institute of Materials, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Shiqi Wang
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
| | - Flavia Fontana
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
| | - Patrícia Figueiredo
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
| | - Jere Lindén
- Faculty of Veterinary Medicine, Finnish Centre for Laboratory Animal Pathology (FCLAP)/HiLIFE, University of Helsinki, Helsinki, FI-00014, Finland
| | - Alexandra Correia
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
| | - Ricardo J B Pinto
- Chemistry Department, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
- CICECO-Aveiro Institute of Materials, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Sami Hietala
- Department of Chemistry, University of Helsinki, Helsinki, FI-00014, Finland
| | - Filipa L Sousa
- Chemistry Department, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
- CICECO-Aveiro Institute of Materials, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
- Helsinki Institute of Life Science (HiLIFE), University of Helsinki, Helsinki, FI-00014, Finland
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Rosário F, Duarte IF, Pinto RJB, Santos C, Hoet PHM, Oliveira H. Biodistribution and pulmonary metabolic effects of silver nanoparticles in mice following acute intratracheal instillations. Environ Sci Pollut Res Int 2021; 28:2301-2314. [PMID: 32885333 DOI: 10.1007/s11356-020-10563-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
The respiratory tract is the route of entry for accidentally inhaled AgNPs, which can reach the lungs and redistribute to other main organs through systemic circulation. In the present work, we aimed to evaluate silver biodistribution and biological effects after 1 or 2 intratracheal instillations (IT) of two differently sized PVP-coated AgNPs (5 and 50 nm-3 mg/kg) and ionic silver (AgNO3-1 mg/kg bw) in mice. Furthermore, nuclear magnetic resonance (NMR) metabolomics was applied to unveil pulmonary metabolic variations. Animals exposed to 5 nm AgNP (AgNP5) showed higher levels of ionic silver in organs, especially in the lung, spleen, kidney and liver, while animals exposed to 50 nm AgNP (AgNP50) showed higher levels of silver in the blood. Animals exposed to AgNP50 excreted higher amounts of silver than those exposed to AgNP5, which is consistent with higher tissue accumulation of silver in animals exposed to the latter. Lung metabolic profiling revealed several Ag-induced alterations in metabolites involved in different pathways, such as glycolysis and tricarboxylic acid (TCA) cycle, amino acid and phospholipid metabolism, and antioxidant defense. Notably, most of the metabolic changes observed after 1 IT were absent in animals subjected to 2 IT of AgNO3, or reversed for AgNPs, suggesting adaptation mechanisms to cope with the initial insult and recover homeostasis. Graphical abstract.
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Affiliation(s)
- Fernanda Rosário
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Iola F Duarte
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-093, Aveiro, Portugal.
| | - Ricardo J B Pinto
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-093, Aveiro, Portugal
| | - Conceição Santos
- Department of Biology, LAQV/REQUIMTE, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal
| | - Peter H M Hoet
- Occupational and Environmental Toxicology, KU Leuven, ON1 Campus Gasthuisberg, Herestraat 49, 3000, Leuven, Belgium
| | - Helena Oliveira
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
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Fonseca DFS, Vilela C, Pinto RJB, Bastos V, Oliveira H, Catarino J, Faísca P, Rosado C, Silvestre AJD, Freire CSR. Bacterial nanocellulose-hyaluronic acid microneedle patches for skin applications: In vitro and in vivo evaluation. Mater Sci Eng C Mater Biol Appl 2020; 118:111350. [PMID: 33254971 DOI: 10.1016/j.msec.2020.111350] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/05/2020] [Accepted: 08/05/2020] [Indexed: 12/30/2022]
Abstract
The aim of the present study was to develop innovative patches for dermo-cosmetic applications based on dissolvable hyaluronic acid (HA) microneedles (MNs) combined with bacterial nanocellulose (BC) as the back layer. HA was employed as an active biomacromolecule, with hydrating and regenerative properties and volumizing effect, whereas BC was used as support for the incorporation of an additional bioactive molecule. Rutin, a natural antioxidant, was selected as the model bioactive compound to demonstrate the effectiveness of the system. The obtained HA-MNs arrays present homogenous and regular needles, with 200 μm in base width, 450 μm in height and 500 μm tip-to-tip distance, and with sufficient mechanical force to withstand skin insertion with a failure force higher than 0.15 N per needle. The antioxidant activity of rutin was neither affected by its incorporation in the MNs system nor by their storage at room temperature for 6 months. Preliminary in vivo studies in human volunteers unveiled their safety and cutaneous compatibility, as no significant changes in barrier function, stratum corneum hydration nor redness were detected. These results confirm the potentiality of this novel system for skin applications, e.g. cosmetics, taking advantage of the recognized properties of HA and the capacity of BC to control the release of bioactive molecules.
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Affiliation(s)
- Daniela F S Fonseca
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carla Vilela
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ricardo J B Pinto
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Verónica Bastos
- CESAM, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Helena Oliveira
- CESAM, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - José Catarino
- CBIOS - Centre for Research in Biosciences & Health Technologies, Lusófona University of Humanities and Technologies, 1740-024 Lisbon, Portugal
| | - Pedro Faísca
- CBIOS - Centre for Research in Biosciences & Health Technologies, Lusófona University of Humanities and Technologies, 1740-024 Lisbon, Portugal; Faculty of Veterinary Medicine, Lusófona University of Humanities and Technologies, Lisbon, Portugal
| | - Catarina Rosado
- CBIOS - Centre for Research in Biosciences & Health Technologies, Lusófona University of Humanities and Technologies, 1740-024 Lisbon, Portugal
| | - Armando J D Silvestre
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carmen S R Freire
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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Pinto RJB, Martins MA, Lucas JMF, Vilela C, Sales AJM, Costa LC, Marques PAAP, Freire CSR. Highly Electroconductive Nanopapers Based on Nanocellulose and Copper Nanowires: A New Generation of Flexible and Sustainable Electrical Materials. ACS Appl Mater Interfaces 2020; 12:34208-34216. [PMID: 32588615 DOI: 10.1021/acsami.0c09257] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nowadays, the development of sustainable high-performance functional nanomaterials is in the spotlight. In this work, we report the preparation of a new generation of flexible and high electroconductive nanopapers based on nanofibrillated cellulose (NFC) and copper nanowires (CuNWs). Homogeneous red brick color nanopapers (thickness 30.2-36.4 μm) were obtained by mixing different amounts of NFC aqueous suspensions and CuNWs (1, 5, 10, 20, and 50 wt %), followed by vacuum filtration and drying. scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analysis confirmed the incorporation of the different amounts of CuNWs, and their uniform and random distribution. All of the nanomaterials displayed good mechanical properties, viz., Young's modulus = 2.62-4.72 GPa, tensile strength = 30.2-70.6 MPa, and elongation at break = 2.3-4.1% for the nanopapers with 50 and 1 wt % of CuNWs mass fraction, respectively. The electrical conductivity of these materials strongly depends on the CuNW content, attaining a value of 5.43 × 104 S·m-1 for the nanopaper with a higher mass fraction. This is one of the highest values reported so far for nanocellulose-based conductive materials. Therefore, these nanopapers can be seen as an excellent inexpensive and green alternative to the current electroconductive materials for applications in electronic devices, energy storage, or sensors.
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Affiliation(s)
- Ricardo J B Pinto
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Manuel A Martins
- CICECO-Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - José M F Lucas
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carla Vilela
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Antonio J M Sales
- I3N-Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Luís C Costa
- I3N-Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Paula A A P Marques
- TEMA-Mechanical Engineering Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carmen S R Freire
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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Silva NHCS, Figueira P, Fabre E, Pinto RJB, Pereira ME, Silvestre AJD, Marrucho IM, Vilela C, Freire CSR. Dual nanofibrillar-based bio-sorbent films composed of nanocellulose and lysozyme nanofibrils for mercury removal from spring waters. Carbohydr Polym 2020; 238:116210. [PMID: 32299563 DOI: 10.1016/j.carbpol.2020.116210] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 02/06/2020] [Revised: 03/20/2020] [Accepted: 03/20/2020] [Indexed: 01/01/2023]
Abstract
The present study explores the preparation of dual nanofibrillar-based bio-sorbent films composed of cellulose nanofibrils (CNFs) and lysozyme nanofibrils (LNFs) for application in the removal of Hg(II) from aqueous solutions. The free-standing films were fabricated via simple vacuum filtration of water suspensions of CNFs and LNFs and disclose good mechanical and thermal properties. The Hg(II) removal efficiency was evaluated by atomic fluorescence spectroscopy in ultra-pure and natural spring waters contaminated with environmental realistic levels of mercury (50 μg L-1). The removal efficiency is pH-dependent reaching a maximum of 99 % after 24 h at a pH value close to the isoelectric point of the protein. Under the experimental conditions, the sorption kinetics are well described by the pseudo-second-order and Elovich models, suggesting a chemisorption mechanism. These results demonstrate the ability of the dual nanofibrillar-based films to remove Hg(II) from water samples reaching a residual concentration lower than the guideline value for water intended for human consumption (1 μg L-1). Therefore, the CNFs/LNFs bio-sorbents might be a solution to treat low-concentrated mercury-contaminated waters.
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Affiliation(s)
- Nuno H C S Silva
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Paula Figueira
- CESAM and LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal
| | - Elaine Fabre
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; CESAM and LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Ricardo J B Pinto
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Maria Eduarda Pereira
- CESAM and LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Armando J D Silvestre
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Isabel M Marrucho
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Carla Vilela
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carmen S R Freire
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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10
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Carvalho JPF, Silva ACQ, Bastos V, Oliveira H, Pinto RJB, Silvestre AJD, Vilela C, Freire CSR. Nanocellulose-Based Patches Loaded with Hyaluronic Acid and Diclofenac towards Aphthous Stomatitis Treatment. Nanomaterials (Basel) 2020; 10:E628. [PMID: 32231070 PMCID: PMC7221765 DOI: 10.3390/nano10040628] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/24/2020] [Accepted: 03/26/2020] [Indexed: 12/29/2022]
Abstract
Nanostructured patches composed of bacterial nanocellulose (BNC), hyaluronic acid (HA) and diclofenac (DCF) were developed, envisioning the treatment of aphthous stomatitis. Freestanding patches were prepared via diffusion of aqueous solutions of HA and DCF, with different concentrations of DCF, into the wet BNC three-dimensional porous network. The resultant dual polysaccharides-based patches with a nanostructured morphology present thermal stability up to 200 °C, as well as good dynamic mechanical properties, with a storage modulus higher than 1.0 GPa. In addition, the patches are non-cytotoxic to human keratinocytes (HaCaT cells), with a cell viability of almost 100% after 24 h. The in vitro release profile of DCF from the patches was evaluated in simulated saliva, and the data refer to a diffusion- and swelling-controlled drug-release mechanism. The attained results hint at the possibility of using these dual polysaccharides-based oral mucosal patches to target aphthous stomatitis.
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Affiliation(s)
- João P. F. Carvalho
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.P.F.C.); (A.C.Q.S.); (R.J.B.P.); (A.J.D.S.)
| | - Ana C. Q. Silva
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.P.F.C.); (A.C.Q.S.); (R.J.B.P.); (A.J.D.S.)
| | - Verónica Bastos
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; (V.B.); (H.O.)
| | - Helena Oliveira
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; (V.B.); (H.O.)
| | - Ricardo J. B. Pinto
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.P.F.C.); (A.C.Q.S.); (R.J.B.P.); (A.J.D.S.)
| | - Armando J. D. Silvestre
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.P.F.C.); (A.C.Q.S.); (R.J.B.P.); (A.J.D.S.)
| | - Carla Vilela
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.P.F.C.); (A.C.Q.S.); (R.J.B.P.); (A.J.D.S.)
| | - Carmen S. R. Freire
- CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (J.P.F.C.); (A.C.Q.S.); (R.J.B.P.); (A.J.D.S.)
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11
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Pinto RJB, Bispo D, Vilela C, Botas AMP, Ferreira RAS, Menezes AC, Campos F, Oliveira H, Abreu MH, Santos SAO, Freire CSR. One-Minute Synthesis of Size-Controlled Fucoidan-Gold Nanosystems: Antitumoral Activity and Dark Field Imaging. Materials (Basel) 2020; 13:E1076. [PMID: 32121128 PMCID: PMC7084562 DOI: 10.3390/ma13051076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 02/20/2020] [Accepted: 02/24/2020] [Indexed: 12/13/2022]
Abstract
Gold nanoparticles (AuNPs) are one of the most studied nanosystems with great potential for biomedical applications, including cancer therapy. Although some gold-based systems have been described, the use of green and faster methods that allow the control of their properties is of prime importance. Thus, the present study reports a one-minute microwave-assisted synthesis of fucoidan-coated AuNPs with controllable size and high antitumoral activity. The NPs were synthesized using a fucoidan-enriched fraction extracted from Fucus vesiculosus, as the reducing and capping agent. The ensuing monodispersed and spherical NPs exhibit tiny diameters between 5.8 and 13.4 nm for concentrations of fucoidan between 0.5 and 0.05% (w/v), respectively, as excellent colloidal stability in distinct solutions and culture media. Furthermore, the NPs present antitumoral activity against three human tumor cell lines (MNT-1, HepG2, and MG-63), and flow cytometry in combination with dark-field imaging confirmed the cellular uptake of NPs by MG-63 cell line.
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Affiliation(s)
- Ricardo J. B. Pinto
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (D.B.); (C.V.); (S.A.O.S.)
| | - Daniela Bispo
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (D.B.); (C.V.); (S.A.O.S.)
| | - Carla Vilela
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (D.B.); (C.V.); (S.A.O.S.)
| | - Alexandre M. P. Botas
- Phantom-G, Department of Physics, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.P.B.); (R.A.S.F.)
| | - Rute A. S. Ferreira
- Phantom-G, Department of Physics, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.P.B.); (R.A.S.F.)
| | - Ana C. Menezes
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; (A.C.M.); (F.C.); (H.O.)
| | - Fábio Campos
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; (A.C.M.); (F.C.); (H.O.)
| | - Helena Oliveira
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; (A.C.M.); (F.C.); (H.O.)
| | - Maria H. Abreu
- ALGAplus—Prod. e Comerc. De Algas e Seus Derivados, Lda., 3830-196 Ílhavo, Portugal;
| | - Sónia A. O. Santos
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (D.B.); (C.V.); (S.A.O.S.)
| | - Carmen S. R. Freire
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal; (D.B.); (C.V.); (S.A.O.S.)
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12
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Pais ACS, Pinto CA, Ramos PAB, Pinto RJB, Rosa D, Duarte MF, Abreu MH, Rocha SM, Saraiva JA, Silvestre AJD, Santos SAO. High pressure extraction of bioactive diterpenes from the macroalgae Bifurcaria bifurcata: an efficient and environmentally friendly approach. RSC Adv 2019; 9:39893-39903. [PMID: 35541373 PMCID: PMC9076218 DOI: 10.1039/c9ra06547d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/22/2019] [Indexed: 11/21/2022] Open
Abstract
The brown macroalgae Bifurcaria bifurcata have gained special attention due to their ability to biosynthesize linear diterpenes (rarely found in other species). However, the conventional extraction methods normally used to extract these compounds involve organic solvents and often high temperatures, leading to the degradation of thermo-labile compounds. In this context, the main objective of this work was to study and optimize for the first time the extraction of diterpenes from B. bifurcata through an environmentally friendly methodology, namely, high pressure extraction (HPE) using ethanol : water. This was compared with conventional Soxhlet extraction, using dichloromethane. Box–Behnken design was employed to evaluate the linear, quadratic, and interaction effects of 3 independent variables (pressure (X1), ethanol percentage (X2), and time of extraction (X3)) on response variables (extraction yield and diterpenes content (mg g−1 of extract and mg kg−1 of dry weight)) and the optimal extraction conditions (X1: 600 MPa; X2: 80%; X3: 5 min) were estimated by response surface methodology (RSM). B. bifurcata extract obtained under HPE optimal conditions showed a diterpenes content (612.2 mg g−1 of extract) 12.2 fold higher than that obtained by conventional extraction (50.1 mg g−1 of extract). The HPE extract, obtained under optimal conditions, showed antioxidant and antibacterial (against Staphylococcus aureus) activities considerably higher than the Soxhlet extract, and also presented a promising synergic effect with antibiotics, improving the antibiotic efficacy against S. aureus. In conclusion, these results indicate that HPE is a promising methodology, compared to conventional methodologies to obtain linear diterpene rich extracts from B. bifurcata with great potential to be exploited in pharmaceutical or biomedical applications. Bioactive linear diterpenes were selectively extracted from the macroalga Bifurcaria bifurcata through optimized high-pressure extraction.![]()
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Affiliation(s)
- Adriana C S Pais
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Carlos A Pinto
- QOPNA/LAQV & REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Patrícia A B Ramos
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal .,QOPNA/LAQV & REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Ricardo J B Pinto
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Daniela Rosa
- Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL), Instituto Politécnico de Beja (IPBeja) Beja 7801-908 Portugal
| | - Maria F Duarte
- Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL), Instituto Politécnico de Beja (IPBeja) Beja 7801-908 Portugal.,Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora Pólo da Mitra 7002-554 Évora Portugal
| | - M Helena Abreu
- ALGAplus-Prod. e Comerc. De Algas e Seus Derivados, Lda. Ílhavo 3830-196 Portugal
| | - Silvia M Rocha
- QOPNA/LAQV & REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Jorge A Saraiva
- QOPNA/LAQV & REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Armando J D Silvestre
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
| | - Sónia A O Santos
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago 3810-193 Aveiro Portugal
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13
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Carrola J, Pinto RJB, Nasirpour M, Freire CSR, Gil AM, Santos C, Oliveira H, Duarte IF. NMR Metabolomics Reveals Metabolism-Mediated Protective Effects in Liver (HepG2) Cells Exposed to Subtoxic Levels of Silver Nanoparticles. J Proteome Res 2018; 17:1636-1646. [DOI: 10.1021/acs.jproteome.7b00905] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Joana Carrola
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ricardo J. B. Pinto
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Maryam Nasirpour
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carmen S. R. Freire
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ana M. Gil
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Conceição Santos
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Helena Oliveira
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- CESAM & Laboratory of Biotechnology and Cytomics, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Iola F. Duarte
- CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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14
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Silva S, Craveiro SC, Oliveira H, Calado AJ, Pinto RJB, Silva AMS, Santos C. Wheat chronic exposure to TiO 2-nanoparticles: Cyto- and genotoxic approach. Plant Physiol Biochem 2017; 121:89-98. [PMID: 29096177 DOI: 10.1016/j.plaphy.2017.10.013] [Citation(s) in RCA: 10] [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: 07/17/2017] [Revised: 10/16/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
This study investigates the phytotoxicity of chronic exposure (up to 20 d) of different TiO2 nanoparticles (TiO2-NP) concentrations (5, 50, 150 mg L-1) in Triticum aestivum. Germination was not affected by TiO2-NP exposure and seedling shoot length (3 d) was enhanced. Contrarily, plants' shoot growth (20 d) was impaired. Effects on membrane permeability and total antioxidant capacity in TiO2-NP chronic exposure were organ dependent: increased in leaves and decreased in roots. Roots also showed lower levels of lipid peroxidation. Flow cytometry revealed no changes in ploidy levels as well as in the cell cycle dynamics for both organs. However, TiO2-NP induced clastogenic effects in roots with increases in micronucleated cells in root tips in a dose dependent manner. Also, increases of DNA single/double strand breaks were found in leaves, and effects were similar to all doses. Ti uptake and translocation to leaves were confirmed by ICP-MS, which was dependent on NP concentration. Overall, these data indicate that TiO2-NP phytotoxicity is more severe after longer exposure periods, higher doses and more severe for shoots than roots. The observed effects are a result of both direct and indirect (oxidative stress and/or water imbalances) action of TiO2-NP. Additionally, results highlight the negative impact that TiO2-NP may have on crop growth and production and to the risk of trophic transfer.
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Affiliation(s)
- Sónia Silva
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal; CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Sandra C Craveiro
- Department of Biology and GeoBioTec Research Unit, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Helena Oliveira
- CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; Department of Biology and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - António J Calado
- Department of Biology and GeoBioTec Research Unit, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Ricardo J B Pinto
- Department of Chemistry and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Artur M S Silva
- Department of Chemistry and QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Conceição Santos
- Department of Chemistry and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal; Department of Biology and LAQV/REQUIMTE, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007 Porto, Portugal.
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15
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Barata JFB, Pinto RJB, Vaz Serra VIRC, Silvestre AJD, Trindade T, Neves MGPMS, Cavaleiro JAS, Daina S, Sadocco P, Freire CSR. Fluorescent Bioactive Corrole Grafted-Chitosan Films. Biomacromolecules 2016; 17:1395-403. [DOI: 10.1021/acs.biomac.6b00006] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Sara Daina
- INNOVHUB
−
Divisione Carta, Piazza Leonardo Da
Vinci, 16, 20133 Milan, Italy
| | - Patrizia Sadocco
- INNOVHUB
−
Divisione Carta, Piazza Leonardo Da
Vinci, 16, 20133 Milan, Italy
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16
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Santos SAO, Pinto RJB, Rocha SM, Marques PAAP, Pascoal Neto C, Silvestre AJD, Freire CSR. Unveiling the chemistry behind the green synthesis of metal nanoparticles. ChemSusChem 2014; 7:2704-2711. [PMID: 25088383 DOI: 10.1002/cssc.201402126] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Indexed: 06/03/2023]
Abstract
Nanobiotechnology has emerged as a fundamental domain in modern science, and metallic nanoparticles (NPs) are one of the largest classes of NPs studied because of their wide spectrum of possible applications in several fields. The use of plant extracts as reducing and stabilizing agents in their synthesis is an interesting and reliable alternative to conventional methodologies. However, the role of the different components of such extracts in the reduction/stabilization of metal ions has not yet been understood clearly. Here we studied the behavior of the main components of a Eucalyptus globulus Labill. bark aqueous extract during metal-ion reduction followed by advanced chromatographic techniques, which allowed us to establish their specific role in the process. The obtained results showed that phenolic compounds, particularly galloyl derivatives, are mainly responsible for the metal-ion reduction, whereas sugars are essentially involved in the stabilization of the NPs.
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Affiliation(s)
- Sónia A O Santos
- Department of Chemistry-CICECO, University of Aveiro, 3810-193 Aveiro (Portugal), Fax: (+351) 234-401-470.
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Conrado TV, Scapim CA, Bignotto LS, Pinto RJB, Freitas ILJ, Amaral AT, Pinheiro AC. Diallel analysis of corn for special use as corn grits: determining the main genetic effects for corn gritting ability. Genet Mol Res 2014; 13:6548-56. [PMID: 25177935 DOI: 10.4238/2014.august.26.5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Corn grits are used for various purposes such as flakes, snacks, livestock feed, hominy, extruded products, beer, etc. The grit size proportion varies according to the hybrid, and thus, once the use of the grits is linked to the particle size, determining the genetic effects is essential to develop hybrids for any specific use. For this purpose a complete diallel series of crosses, involving eight parents, was performed near Maringá, PR, Brazil. The objective of this study was to evaluate the general (GCA) and specific (SCA) combining abilities of 28 progeny for selection of hybrids for breeding programs and extraction of inbred lines for hybrid development. The response variables, such as plant height, ear insertion height, crop stand, grain yield, and grits, small grits and bran production, were gauged and appraised for each of the 28 progeny. The trait effects and GCA were significant for all response variables, while for SCA, only grain yield and crop stand showed significance (P < 0.05), according to Griffing (1955) analysis. A significant weak negative partial correlation was found between grain yield and grits conversion. In relation to the hybrid selection for breeding programs, the parent IAC Nelore was highly recommended for recurrent selection and the hybrids IPR 119 x HT 392 and IAC Nelore x HD 332 for the extraction of pure lines for hybrid development.
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Affiliation(s)
- T V Conrado
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, Brasil
| | - C A Scapim
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, Brasil
| | - L S Bignotto
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, Brasil
| | - R J B Pinto
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, Brasil
| | - I L J Freitas
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil
| | - A T Amaral
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil
| | - A C Pinheiro
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, Brasil
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18
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Affiliation(s)
- Ricardo J. B. Pinto
- Department of Chemistry, CICECO; University of Aveiro; 3810-193 Aveiro Portugal
| | - Luís D. Carlos
- Department of Physics, CICECO; University of Aveiro; 3810-193 Aveiro Portugal
| | - Paula A. A. P. Marques
- Department of Mechanical Engineering, TEMA; University of Aveiro; 3810-193 Aveiro Portugal
| | | | - Carmen S. R. Freire
- Department of Chemistry, CICECO; University of Aveiro; 3810-193 Aveiro Portugal
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Pinto RJB, Granadeiro CM, Freire CSR, Silvestre AJD, Neto CP, Ferreira RAS, Carlos LD, Cavaleiro AMV, Trindade T, Nogueira HIS. Luminescent Transparent Composite Films Based on Lanthanopolyoxometalates and Filmogenic Polysaccharides. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201174] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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21
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Moterle LM, Braccini AL, Scapim CA, Pinto RJB, Gonçalves LSA, do Amaral Júnior AT, Silva TRC. Combining ability of tropical maize lines for seed quality and agronomic traits. Genet Mol Res 2011; 10:2268-78. [PMID: 21968766 DOI: 10.4238/vol10-3gmr1129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Studies of genetic effects of early selection of maize based on seed quality traits are rare, especially those that use materials from different heterotic groups. These studies are also useful in tropical environments and for the advancement of sustainable agriculture with cropping during seasons not commonly used for cultivation. We estimated, through diallel crosses, the predominant genetic effects on the expression of agronomic traits and seed quality and on the general combining ability of nine maize lines from commercial hybrids and the specific combining ability of hybrid combinations among them. In the evaluation of seed quality, seven tests were used: first count and final count of seed germination, seedling vigor classification, cold tolerance, seedling emergence rate in a sand seedbed, speed of emergence in a sand seedbed, and speed of emergence index. Plant height, first ear height and grain yield were the estimated agronomic traits. In the diallel analysis, method 3 (model I) proposed by Griffing was used. There was a greater significance of non-additive genetic effects in the genetic control of seed quality of the various lines. The Flash, Dekalb 350 and P 30F80 lines combined high seed quality and high grain yield. For growth during the normal planting season, the combinations CD 3121-1 x P 30F80, Speed x CD 3121-2, Dow 8330 x AG 8080 and Dekalb 350 x CD 3121-2 were the most promising for both seed quality and agronomic traits.
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Affiliation(s)
- L M Moterle
- Universidade Estadual de Maringá, Maringá, PR, Brasil
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Pinto RJB, Marques PAAP, Martins MA, Neto CP, Trindade T. Electrostatic assembly and growth of gold nanoparticles in cellulosic fibres. J Colloid Interface Sci 2007; 312:506-12. [PMID: 17459404 DOI: 10.1016/j.jcis.2007.03.043] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2006] [Revised: 02/02/2007] [Accepted: 03/17/2007] [Indexed: 11/15/2022]
Abstract
Synthetic studies of nanocomposites containing gold nanoparticles attached onto wood or bacterial cellulosic fibres have been performed in situ in the presence of the fibres or by polyelectrolyte-assisted deposition. The optical properties of the final nanocomposites could be tailored not only by the starting Au nanoparticles characteristics but also by the preparative method associated to the type of cellulosic fibres used as the substrate. Thus, gold nanoparticles assembled or generated in situ within cellulosic fibres, are excellent components for long term optical and chemically stable nanocomposites, which appear particularly interesting for security paper applications.
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Affiliation(s)
- Ricardo J B Pinto
- Chemistry Department, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
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