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Luo X, Wang Q, Liu W, Wu Y, Yang J, Chen P, Zhuang W, Zheng Y. Characterization and safety assessment of bamboo shoot shell cellulose nanofiber: Prepared by acidolysis combined with dynamic high-pressure microfluidization. Carbohydr Polym 2024; 335:122082. [PMID: 38616100 DOI: 10.1016/j.carbpol.2024.122082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/19/2024] [Accepted: 03/21/2024] [Indexed: 04/16/2024]
Abstract
The preparation of cellulose nanofiber (CNF) using traditional methods is currently facing challenges due to concerns regarding environmental pollution and safety. Herein, a novel CNF was obtained from bamboo shoot shell (BSS) by low-concentration acid and dynamic high-pressure microfluidization (DHPM) treatment. The resulting CNF was then characterized, followed by in vitro and in vivo safety assessments. Compared to insoluble dietary fiber (IDF), the diameters of HIDF (IDF after low-concentration acid hydrolysis) and CNF were significantly decreased to 167.13 nm and 70.97 nm, respectively. Meanwhile, HIDF and CNF showed a higher crystallinity index (71.32 % and 74.35 %). Structural analysis results indicated the successful removal of lignin and hemicellulose of HIDF and CNF, with CNF demonstrating improved thermostability. In vitro, a high dose of CNF (1500 μg/mL) did not show any signs of cytotoxicity on Caco-2 cells. In vivo, no death was observed in the experimental mice, and there was no significant difference between CNF (1000 mg/kg·bw) and control group in hematological index and histopathological analysis. Overall, this study presents an environmentally friendly method for preparing CNF from BSS while providing evidence regarding its safety through in vitro and in vivo assessments, laying the foundation for its potential application in food.
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Affiliation(s)
- Xianliang Luo
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Qi Wang
- Institute of Food Science and Technology, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China
| | - Wangxin Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yirui Wu
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Junyi Yang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Peng Chen
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Weijing Zhuang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Yafeng Zheng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
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Palanisamy S, Selvaraju GD, Selvakesavan RK, Venkatachalam S, Bharathi D, Lee J. Unlocking sustainable solutions: Nanocellulose innovations for enhancing the shelf life of fruits and vegetables - A comprehensive review. Int J Biol Macromol 2024; 261:129592. [PMID: 38272412 DOI: 10.1016/j.ijbiomac.2024.129592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
Regarding food security and waste reduction, preserving fruits and vegetables is a vital problem. This comprehensive study examines the innovative potential of coatings and packaging made of nanocellulose to extend the shelf life of perishable foods. The distinctive merits of nanocellulose, which is prepared from renewable sources, include exceptional gas barrier performance, moisture retention, and antibacterial activity. As a result of these merits, it is a good option for reducing food spoilage factors such as oxidation, desiccation, and microbiological contamination. Nanocellulose not only enhances food preservation but also complies with industry-wide environmental objectives. This review explores the many facets of nanocellulose technology, from its essential characteristics to its use in the preservation of fruits and vegetables. Furthermore, it deals with vital issues including scalability, cost-effectiveness, and regulatory constraints. While the use of nanocellulose in food preservation offers fascinating potential, it also wants to be cautiously careful to assure affordability, effectiveness, and safety. To fully use the potential of nanocellulose and advance the sustainability plan in the food business, collaboration between scientists, regulatory bodies, and industry stakeholders is important as we stand on the cusp of a revolutionary era in food preservation.
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Affiliation(s)
- Senthilkumar Palanisamy
- School of Biotechnology, Dr. G R Damodaran College of Science, Coimbatore, Tamilnadu, India.
| | - Gayathri Devi Selvaraju
- Department of Biotechnology, KIT - Kalaignarkarunanidhi Institute of Technology, Coimbatore, Tamil Nadu, India
| | | | | | - Devaraj Bharathi
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea.
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea
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3
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Larrañaga A, Bello-Álvarez C, Lizundia E. Cytotoxicity and Inflammatory Effects of Chitin Nanofibrils Isolated from Fungi. Biomacromolecules 2023; 24:5737-5748. [PMID: 37988418 PMCID: PMC10716858 DOI: 10.1021/acs.biomac.3c00710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 11/04/2023] [Accepted: 11/06/2023] [Indexed: 11/23/2023]
Abstract
Fungal nanochitin can assist the transition from the linear fossil-based economy to a circular biobased economy given its environmental benefits over conventional crustacean-nanochitin. Its real-world implementation requires carefully assessing its toxicity so that unwanted human health and environmental issues are avoided. Accordingly, the cytotoxicity and inflammatory effects of chitin nanofibrils (ChNFs) from white mushroom is assessed. ChNFs are few nanometers in diameter, with a 75.8% N-acetylation degree, a crystallinity of 59.1%, and present a 44:56 chitin/glucan weight ratio. Studies are conducted for aqueous colloidal ChNF dispersions (0-5 mg·mL-1) and free-standing films having physically entangled ChNFs. Aqueous dispersions of chitin nanocrystals (ChNCs) isolated via hydrochloric acid hydrolysis of α-chitin powder are also evaluated for comparison. Cytotoxicity studies conducted in human fibroblasts (MRC-5 cells) and murine brain microglia (BV-2 cells) reveal a comparatively safer behavior over related biobased nanomaterials. However, a strong inflammatory response was observed when BV-2 cells were cultured in the presence of colloidal ChNFs. These novel cytotoxicity and inflammatory studies shed light on the potential of fungal ChNFs for biomedical applications.
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Affiliation(s)
- Aitor Larrañaga
- Department
of Mining-Metallurgy Engineering and Materials Science, POLYMAT, Faculty of Engineering in Bilbao. University of the
Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Biscay, Spain
| | - Carlos Bello-Álvarez
- Department
of Mining-Metallurgy Engineering and Materials Science, POLYMAT, Faculty of Engineering in Bilbao. University of the
Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo 1, 48013 Bilbao, Biscay, Spain
| | - Erlantz Lizundia
- Life
Cycle Thinking Group, Department of Graphic Design and Engineering
Projects. University of the Basque Country
(UPV/EHU), Plaza Ingeniero
Torres Quevedo 1, 48013 Bilbao, Biscay, Spain
- BCMaterials,
Basque Center for Materials, Applications and Nanostructures, Edif. Martina Casiano, Pl. 3 Parque
Científico UPV/EHU Barrio Sarriena, 48940 Leioa, Biscay, Spain
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Seth R, Meena A, Meena R. Enzyme-based green synthesis, characterisation, and toxicity studies of cellulose nanocrystals/fibres produced from the Vetiveria zizanioides roots agro-waste. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:116984-116999. [PMID: 36484940 DOI: 10.1007/s11356-022-24455-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Vetiver zizanioides roots are considered the most useful part of the plant. It is widely used to extract oil. The aromatic oil is used in perfumery, food-flavouring and cosmetic industries. However, presently, there are no reports available for the usage of vetiver roots agro-waste after oil extraction in nano-based products. Considering the concept of value-added products and green-chemistry approaches, synthesising cellulose nanoparticles (CNPs) using enzymatic treatment from agro-waste has emerged as a viable option. CNP's non-toxicity, biodegradability, and biocompatibility have sparked the industry's interest in its production. Therefore, in the present study, 3 enzymes, cellulase, pectinase, and viscozymes, were used for the green synthesis of CNP. The characterisation of CNP was done using techniques like DLS, FTIR, TEM, SEM, AFM, and TG/DTG, and cytotoxicity of CNP was studied in human skin cell-line (HaCaT) using MTT assay. Results show that CNPs synthesised using viscozyme and pectinase were of crystalline nature (2.0-3.0 nm) and cellulase were of fibres (40-60 nm). The FTIR confirmed that CNPs were devoid of lignin/hemicellulose. The AFM pictures revealed thick and thin nanoparticles with a variety of morphologies. The thermal stability of cellulose was higher compared to CNP. All the synthesised CNPs were crystaline, with a 60-70% crystallinity index. Furthermore, CNP did not show cytotoxic effect on HaCaT cells upto 500 µg/mL concentrations. In conclusion, pectinase and viscosyme may be used for synthesing cellulose-nanocrystals and cellulase enzyme for cellulose-nanofibers from the vetiver roots agro-waste. The findings revealed that Vetiveria zizanioides agro-waste-derived CNP is a sustainable material that can be used as a reinforcing agent/nanocarrier in textile and drug-delivery systems.
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Affiliation(s)
- Richa Seth
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, Uttar Pradesh, India
| | - Abha Meena
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, Uttar Pradesh, India.
| | - Ramavatar Meena
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, Uttar Pradesh, India
- Natural Products & Green Chemistry Discipline, CSIR-Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar, 364002, India
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Mejía-Jaramillo AM, Gómez-Hoyos C, Cañas Gutierrez AI, Correa-Hincapié N, Zuluaga Gallego R, Triana-Chávez O. Tackling the cytotoxicity and genotoxicity of cellulose nanofibers from the banana rachis: A new food packaging alternative. Heliyon 2023; 9:e21560. [PMID: 37954306 PMCID: PMC10632726 DOI: 10.1016/j.heliyon.2023.e21560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/21/2023] [Accepted: 10/24/2023] [Indexed: 11/14/2023] Open
Abstract
Cellulose nanofibrils from the banana rachis are a good alternative as packaging materials, food packaging, stabilizing agents, and functional food ingredients. To address the potential effects of ingested banana rachis cellulose nanofibrils (BR-CNFs), their toxicity in vitro and in vivo was evaluated using Caco-2 intestinal cells and mice, respectively. The results showed that BR-CNFs did not cause cytotoxic effects at the concentrations evaluated on Caco-2 cells. In addition to cytotoxicity tests, genotoxicity assays using comet assay indicated that Caco-2 cells showed no DNA damage at the concentrations of CNFs tested. Finally, acute in vivo cytotoxicity assays indicated that mice showed no sign of pathogenesis or lesions in the liver, kidney, or small intestine when treated with a single dose of BR-CNFs. Moreover, when the mice were treated daily for a month with BR-CNFs no hyperplasia or hypertrophy was observed in any of the organs evaluated. Additionally, biochemical parameters such as blood chemistry, creatinine, liver enzymes, and renal function showed that the BR-CNFs do not cause organ damage. Overall, this study shows that BR-CNFs are neither cytotoxic nor genotoxic. In conclusion, these studies are essential to guarantee the safety of this high value-added product in the food industry.
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Affiliation(s)
- Ana María Mejía-Jaramillo
- Grupo Biología y Control de Enfermedades Infecciosas - BCEI, Universidad de Antioquia, Medellín, 050010, Colombia
| | - Catalina Gómez-Hoyos
- Facultad de Ingeniería Agroindustrial, Universidad Pontificia Bolivariana, Circular 1_N_70-01, Medellín, 050031, Colombia
| | - Ana Isabel Cañas Gutierrez
- Facultad de Ingeniería Agroindustrial, Universidad Pontificia Bolivariana, Circular 1_N_70-01, Medellín, 050031, Colombia
| | - Natalia Correa-Hincapié
- Grupo Calidad, Metrología y Producción, Instituto Tecnológico Metropolitano, Medellín, 050013, Colombia
| | - Robin Zuluaga Gallego
- Facultad de Ingeniería Agroindustrial, Universidad Pontificia Bolivariana, Circular 1_N_70-01, Medellín, 050031, Colombia
| | - Omar Triana-Chávez
- Grupo Biología y Control de Enfermedades Infecciosas - BCEI, Universidad de Antioquia, Medellín, 050010, Colombia
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6
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Jamilludin MA, Dinatha IKH, Supii AI, Partini J, Kusindarta DL, Yusuf Y. Functionalized cellulose nanofibrils in carbonate-substituted hydroxyapatite nanorod-based scaffold from long-spined sea urchin ( Diadema setosum) shells reinforced with polyvinyl alcohol for alveolar bone tissue engineering. RSC Adv 2023; 13:32444-32456. [PMID: 37928842 PMCID: PMC10623659 DOI: 10.1039/d3ra06165e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023] Open
Abstract
In this study, carbonate-substituted hydroxyapatite (C-HAp) nanorods were synthesised using a dissolution-precipitation reaction on hydroxyapatite (HAp) nanorods based on long-spined sea urchin (Diadema setosum) shells. From the EDS analysis, the Ca/P molar ratio of C-HAp was 1.705, which was very close to the Ca/P of natural bone apatite of 1.71. The FTIR and XRD analyses revealed the AB-type CHAp of the C-HAp nanorods. The TEM showed the rod-like shape of nanosize C-HAp with a high aspect ratio. The antibacterial test against Pseudomonas aeruginosa and Staphylococcus aureus also showed that C-HAp had a high antibacterial activity. The C-HAp/PVA-based scaffolds were fabricated, using a freeze-drying method, for use in alveolar bone tissue engineering applications. There were various scaffolds, with no filler, with microcrystalline cellulose (MCC) filler, and with cellulose nanofibrils (CNF) filler. The physicochemical analysis showed that adding PVA and cellulose caused no chemical decomposition but decreased the scaffold crystallinity, and the lower crystallinity created more dislocations that can help cells proliferate well. The antibacterial activity showed that the CNF induced the higher antibacterial level of the scaffold. According to the SEM results, the micropores of the C-HAp/PVA/CNF can provide a place for cells to grow, and its porosity can promote cell nutrient supply. The macropores of the C-HAp/PVA/CNF were also suitable for cells and new blood vessels. Therefore, the C-HAp/PVA/CNF scaffold was examined for its cytocompatibility using the MTT assay against NIH/3T3 fibroblast cells with a 24 h incubation. The C-HAp/PVA/CNF scaffold showed a high cell viability of 90.36 ± 0.37% at a low scaffold dose of 31.25 μg mL-1. The scaffold could also facilitate NIH/3T3 cells to attach to its surface. The IC50 value had also been estimated to be 2732 μg mL-1.
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Affiliation(s)
- Muhammad Amir Jamilludin
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada Yogyakarta 55281 Indonesia
| | - I Kadek Hariscandra Dinatha
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada Yogyakarta 55281 Indonesia
| | - Apri I Supii
- Research Centre for Marine and Land Bioindustry, National Research and Innovation Agency Lombok Utara 83352 Indonesia
| | - Juliasih Partini
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada Yogyakarta 55281 Indonesia
| | - Dwi Liliek Kusindarta
- Department of Anatomy, Faculty of Veterinary Medicine, Universitas Gadjah Mada Yogyakarta 55281 Indonesia
| | - Yusril Yusuf
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada Yogyakarta 55281 Indonesia
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Ventura C, Pinto F, Lourenço AF, Pedrosa JFS, Fernandes SN, da Rosa RR, Godinho MH, Ferreira PJT, Louro H, Silva MJ. Assessing the Genotoxicity of Cellulose Nanomaterials in a Co-Culture of Human Lung Epithelial Cells and Monocyte-Derived Macrophages. Bioengineering (Basel) 2023; 10:986. [PMID: 37627871 PMCID: PMC10452089 DOI: 10.3390/bioengineering10080986] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/16/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Cellulose micro/nanomaterials (CMNMs) are innovative materials with a wide spectrum of industrial and biomedical applications. Although cellulose has been recognized as a safe material, the unique properties of its nanosized forms have raised concerns about their safety for human health. Genotoxicity is an endpoint that must be assessed to ensure that no carcinogenic risks are associated with exposure to nanomaterials. In this study, we evaluated the genotoxicity of two types of cellulose micro/nanofibrils (CMF and CNF) and one sample of cellulose nanocrystals (CNC), obtained from industrial bleached Eucalyptus globulus kraft pulp. For that, we exposed co-cultures of human alveolar epithelial A549 cells and THP-1 monocyte-derived macrophages to a concentration range of each CMNM and used the micronucleus (MN) and comet assays. Our results showed that only the lowest concentrations of the CMF sample were able to induce DNA strand breaks (FPG-comet assay). However, none of the three CMNMs produced significant chromosomal alterations (MN assay). These findings, together with results from previous in vitro studies using monocultures of A549 cells, indicate that the tested CNF and CNC are not genotoxic under the conditions tested, while the CMF display a low genotoxic potential.
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Affiliation(s)
- Célia Ventura
- Department of Human Genetics, Instituto Nacional de Saúde Doutor Ricardo Jorge, Av Padre Cruz, 1649-016 Lisbon, Portugal; (C.V.); (F.P.); (H.L.)
- ToxOmics—Centre for Toxicogenomics and Human Health, NOVA Medical School, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | - Fátima Pinto
- Department of Human Genetics, Instituto Nacional de Saúde Doutor Ricardo Jorge, Av Padre Cruz, 1649-016 Lisbon, Portugal; (C.V.); (F.P.); (H.L.)
- ToxOmics—Centre for Toxicogenomics and Human Health, NOVA Medical School, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | | | - Jorge F. S. Pedrosa
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Pólo II, R. Sílvio Lima, 3030-790 Coimbra, Portugal; (J.F.S.P.); (P.J.T.F.)
| | - Susete N. Fernandes
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Lisbon, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Rafaela R. da Rosa
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Lisbon, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Maria Helena Godinho
- i3N/CENIMAT, Department of Materials Science, NOVA School of Science and Technology, NOVA University Lisbon, Campus de Caparica, 2829-516 Lisbon, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Paulo J. T. Ferreira
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Pólo II, R. Sílvio Lima, 3030-790 Coimbra, Portugal; (J.F.S.P.); (P.J.T.F.)
| | - Henriqueta Louro
- Department of Human Genetics, Instituto Nacional de Saúde Doutor Ricardo Jorge, Av Padre Cruz, 1649-016 Lisbon, Portugal; (C.V.); (F.P.); (H.L.)
- ToxOmics—Centre for Toxicogenomics and Human Health, NOVA Medical School, NOVA University Lisbon, 1169-056 Lisbon, Portugal
| | - Maria João Silva
- Department of Human Genetics, Instituto Nacional de Saúde Doutor Ricardo Jorge, Av Padre Cruz, 1649-016 Lisbon, Portugal; (C.V.); (F.P.); (H.L.)
- ToxOmics—Centre for Toxicogenomics and Human Health, NOVA Medical School, NOVA University Lisbon, 1169-056 Lisbon, Portugal
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8
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Ghilan A, Nicu R, Ciolacu DE, Ciolacu F. Insight into the Latest Medical Applications of Nanocellulose. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4447. [PMID: 37374630 DOI: 10.3390/ma16124447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023]
Abstract
Nanocelluloses (NCs) are appealing nanomaterials that have experienced rapid development in recent years, with great potential in the biomedical field. This trend aligns with the increasing demand for sustainable materials, which will contribute both to an improvement in wellbeing and an extension of human life, and with the demand to keep up with advances in medical technology. In recent years, due to the diversity of their physical and biological properties and the possibility of tuning them according to the desired goal, these nanomaterials represent a point of maximum interest in the medical field. Applications such as tissue engineering, drug delivery, wound dressing, medical implants or those in cardiovascular health are some of the applications in which NCs have been successfully used. This review presents insight into the latest medical applications of NCs, in the forms of cellulose nanocrystals (CNCs), cellulose nanofibers (CNFs) and bacterial nanocellulose (BNC), with an emphasis on the domains that have recently experienced remarkable growth, namely wound dressing, tissue engineering and drug delivery. In order to highlight only the most recent achievements, the presented information is focused on studies from the last 3 years. Approaches to the preparation of NCs are discussed either by top-down (chemical or mechanical degradation) or by bottom-up (biosynthesis) techniques, along with their morphological characterization and unique properties, such as mechanical and biological properties. Finally, the main challenges, limitations and future research directions of NCs are identified in a sustained effort to identify their effective use in biomedical fields.
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Affiliation(s)
- Alina Ghilan
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Raluca Nicu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Diana E Ciolacu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Florin Ciolacu
- Department of Natural and Synthetic Polymers, "Gheorghe Asachi" Technical University of Iasi, 700050 Iasi, Romania
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9
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Surgical cotton microfibers loaded with proteins and apatite: A potential platform for bone tissue engineering. Int J Biol Macromol 2023; 236:123812. [PMID: 36854368 DOI: 10.1016/j.ijbiomac.2023.123812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 02/13/2023] [Accepted: 02/19/2023] [Indexed: 02/28/2023]
Abstract
Tissue engineering has emerged as the best alternative to replacing damaged tissue/organs. However, the cost of scaffold materials continues to be a significant obstacle; thus, developing inexpensive scaffolds is strongly encouraged. In this study, cellulose microfibers (C), gelatin (G), egg white (EW), and nanohydroxyapatite (nHA) were assembled into a quaternary scaffold using EDC-NHS crosslinking, followed by freeze-drying method. Cellulose microfibers as a scaffold have only received a limited amount of research due to the absence of an intrinsic three-dimensional structure. Gelatin, more likely to interact chemically with collagen, was used to provide a stable structure to the cellulose microfibers. EW was supposed to provide the scaffold with numerous cell attachment sites. nHA was chosen to enhance the scaffold's bone-bonding properties. Physico-chemical, mechanical, and biological characterization of scaffolds were studied. In-vitro using MG-63 cells and in-ovo studies revealed that all scaffolds were biocompatible. The results of the DPPH assay demonstrate the ability of CGEWnHA to reduce free radicals. The CGEWnHA scaffold exhibits the best properties with 56.84 ± 28.45 μm average pore size, 75 ± 1.4 % porosity, 39.23 % weight loss, 109.19 ± 0.98 kPa compressive modulus, and 1.72 Ca/P ratio. As a result, the constructed CGEWnHA scaffold appears to be a viable choice for BTE applications.
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10
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Encapsulation of resveratrol via spray-drying of oil-in-water emulsions produced by ultrasound or membrane emulsification. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2023.111488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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11
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Rosendahl J, Zarna C, Håkansson J, Chinga-Carrasco G. Gene-Expression Analysis of Human Fibroblasts Affected by 3D-Printed Carboxylated Nanocellulose Constructs. BIOENGINEERING (BASEL, SWITZERLAND) 2023; 10:bioengineering10010121. [PMID: 36671693 PMCID: PMC9854960 DOI: 10.3390/bioengineering10010121] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/18/2023]
Abstract
Three-dimensional (3D) printing has emerged as a highly valuable tool to manufacture porous constructs. This has major advantages in, for example, tissue engineering, in which 3D scaffolds provide a microenvironment with adequate porosity for cell growth and migration as a simulation of tissue regeneration. In this study, we assessed the suitability of three cellulose nanofibrils (CNF) that were obtained through 2,2,6,6-tetramethylpyperidine-1-oxyl (TEMPO)-mediated oxidation. The CNFs were obtained by applying three levels of carboxylation, i.e., 2.5, 3.8, and 6.0 mmol sodium hypochlorite (NaClO) per gram of cellulose. The CNFs exhibited different nanofibrillation levels, affecting the corresponding viscosity and 3D printability of the CNF gels (0.6 wt%). The scaffolds were manufactured by micro-extrusion and the nanomechanical properties were assessed with nanoindentation. Importantly, fibroblasts were grown on the scaffolds and the expression levels of the marker genes, which are relevant for wound healing and proliferation, were assessed in order to reveal the effect of the 3D-scaffold microenvironment of the cells.
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Affiliation(s)
- Jennifer Rosendahl
- Unit of Biological Function, Division Materials and Production, RISE Research Institutes of Sweden, P.O. Box 857, SE-50115 Borås, Sweden
| | - Chiara Zarna
- RISE PFI, Høgskoleringen 6b, 7491 Trondheim, Norway
| | - Joakim Håkansson
- Unit of Biological Function, Division Materials and Production, RISE Research Institutes of Sweden, P.O. Box 857, SE-50115 Borås, Sweden
- Department of Laboratory Medicine, Institute of Biomedicine, Gothenburg University, P.O. Box 440, SE-40530 Gothenburg, Sweden
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12
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Moriyama A, Ogura I, Fujita K. Potential issues specific to cytotoxicity tests of cellulose nanofibrils. J Appl Toxicol 2023; 43:195-207. [PMID: 36065078 PMCID: PMC10087788 DOI: 10.1002/jat.4390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/05/2022] [Accepted: 09/01/2022] [Indexed: 11/10/2022]
Abstract
Cellulose nanofibrils (also called cellulose nanofibers or nanofibrillated cellulose [CNFs]) are novel polymers derived from biomass with excellent physicochemical properties and various potential applications. However, the introduction of such new materials into the market requires thorough safety studies to be conducted. Recently, toxicity testing using cultured cells has attracted attention as a safety assessment that does not rely on experimental animals. This article reviews recent information regarding the cytotoxicity testing of CNFs and highlights the issues relevant to evaluating tests. In the literature, we found that a variety of cell lines and CNF exposure concentrations was evaluated. Furthermore, the results of cytotoxicity results tests differed and were not necessarily consistent. Numerous reports that we examined had not evaluated endotoxin/microbial contamination or the interaction of CNFs with the culture medium used in the tests. The following potential specific issues involved in CNF in vitro testing, were discussed: (1) endotoxin contamination, (2) microbial contamination, (3) adsorption of culture medium components to CNFs, and (4) changes in aggregation/agglomeration and dispersion states of CNFs resulting from culture medium components. In this review, the available measurement methods and solutions for these issues are also discussed. Addressing these points will lead to a better understanding of the cellular effects of CNFs and the development of safer CNFs.
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Affiliation(s)
- Akihiro Moriyama
- Research Institute of Science and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Isamu Ogura
- Research Institute of Science and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Katsuhide Fujita
- Research Institute of Science and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
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13
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Chu T, Li Q, Dai C, Li X, Kong X, Fan Y, Yin H, Ge J. A novel Nanocellulose-Gelatin-AS-IV external stent resists EndMT by activating autophagy to prevent restenosis of grafts. Bioact Mater 2022; 22:466-481. [PMID: 36330163 PMCID: PMC9615139 DOI: 10.1016/j.bioactmat.2022.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/16/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
Vein grafts are widely used for coronary artery bypass grafting and hemodialysis access, but restenosis remains the "Achilles' heel" of these treatments. An extravascular stent is one wrapped around the vein graft and provides mechanical strength; it can buffer high arterial pressure and secondary vascular dilation of the vein to prevent restenosis. In this study, we developed a novel Nanocellulose-gelatin hydrogel, loaded with the drug Astragaloside IV (AS-IV) as an extravascular scaffold to investigate its ability to reduce restenosis. We found that the excellent physical and chemical properties of the drug AS-IV loaded Nanocellulose-gelatin hydrogel external stent limit graft vein expansion and make the stent biocompatible. We also found it can prevent restenosis by resisting endothelial-to-mesenchymal transition (EndMT) in vitro. It does so by activating autophagy, and AS-IV can enhance this effect both in vivo and in vitro. This study has added to existing research on the mechanism of extravascular stents in preventing restenosis of grafted veins. Furthermore, we have developed a novel extravascular stent for the prevention and treatment of restenosis. This will help optimize the clinical treatment plan of external stents and improve the prognosis in patients with vein grafts. The NC-Gelatin extravascular stent has suitable physicochemical properties to prevent restenosis of the grafted veins. The NC-Gelatin extravascular stent has excellent biocompatibility, which is critical for grafting veins. The NC-Gelatin extravascular stent prevents restenosis by activating autophagy against EndMT. AS-IV can enhance the effect of the stent to activate autophagy against EndMT.
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Affiliation(s)
- Tianshu Chu
- Department of Cardiac Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China,Anhui Provincial Engineering Research Center for Cardiopulmonary and Vascular Materials, Hefei, Anhui, 230001, China
| | - Qingye Li
- College of Food Science, Sichuan Agricultural University, No.46, Xin Kang Road, Yaan, Sichuan Province, 625014, PR China
| | - Chun Dai
- Department of Cardiac Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China,Anhui Provincial Engineering Research Center for Cardiopulmonary and Vascular Materials, Hefei, Anhui, 230001, China
| | - Xiang Li
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xiang Kong
- Department of Cardiac Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China,Anhui Provincial Engineering Research Center for Cardiopulmonary and Vascular Materials, Hefei, Anhui, 230001, China
| | - Yangming Fan
- Department of Cardiac Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China,Anhui Provincial Engineering Research Center for Cardiopulmonary and Vascular Materials, Hefei, Anhui, 230001, China
| | - Hongyan Yin
- Department of Cardiac Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Jianjun Ge
- Department of Cardiac Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China,Anhui Provincial Engineering Research Center for Cardiopulmonary and Vascular Materials, Hefei, Anhui, 230001, China,Corresponding author. The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China.
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14
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Functionalized chitosan/spherical nanocellulose-based hydrogel with superior antibacterial efficiency for wound healing. Carbohydr Polym 2022; 284:119202. [DOI: 10.1016/j.carbpol.2022.119202] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/28/2022] [Accepted: 01/28/2022] [Indexed: 01/12/2023]
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15
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Ventura C, Marques C, Cadete J, Vilar M, Pedrosa JFS, Pinto F, Fernandes SN, da Rosa RR, Godinho MH, Ferreira PJT, Louro H, Silva MJ. Genotoxicity of Three Micro/Nanocelluloses with Different Physicochemical Characteristics in MG-63 and V79 Cells. J Xenobiot 2022; 12:91-108. [PMID: 35645290 PMCID: PMC9149940 DOI: 10.3390/jox12020009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/14/2022] [Accepted: 04/18/2022] [Indexed: 12/10/2022] Open
Abstract
(1) Background: Nanocellulose is an innovative engineered nanomaterial with an enormous potential for use in a wide array of industrial and biomedical applications and with fast growing economic value. The expanding production of nanocellulose is leading to an increased human exposure, raising concerns about their potential health effects. This study was aimed at assessing the potential toxic and genotoxic effects of different nanocelluloses in two mammalian cell lines; (2) Methods: Two micro/nanocelluloses, produced with a TEMPO oxidation pre-treatment (CNFs) and an enzymatic pre-treatment (CMFs), and cellulose nanocrystals (CNCs) were tested in osteoblastic-like human cells (MG-63) and Chinese hamster lung fibroblasts (V79) using the MTT and clonogenic assays to analyse cytotoxicity, and the micronucleus assay to test genotoxicity; (3) Results: cytotoxicity was observed by the clonogenic assay in V79 cells, particularly for CNCs, but not by the MTT assay; CNF induced micronuclei in both cell lines and nucleoplasmic bridges in MG-63 cells; CMF and CNC induced micronuclei and nucleoplasmic bridges in MG-63 cells, but not in V79 cells; (4) Conclusions: All nanocelluloses revealed cytotoxicity and genotoxicity, although at different concentrations, that may be related to their physicochemical differences and availability for cell uptake, and to differences in the DNA damage response of the cell model.
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Affiliation(s)
- Célia Ventura
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
| | - Catarina Marques
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
| | - João Cadete
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
| | - Madalena Vilar
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
| | - Jorge F. S. Pedrosa
- CIEPQPF, Department of Chemical Engineering, University of Coimbra, Pólo II, Rua Silvo Lima, 3030-790 Coimbra, Portugal; (J.F.S.P.); (P.J.T.F.)
| | - Fátima Pinto
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
| | - Susete Nogueira Fernandes
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), NOVA University Lisbon, Campus da Caparica, 2829-516 Caparica, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Rafaela Raupp da Rosa
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), NOVA University Lisbon, Campus da Caparica, 2829-516 Caparica, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Maria Helena Godinho
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology (FCT NOVA), NOVA University Lisbon, Campus da Caparica, 2829-516 Caparica, Portugal; (S.N.F.); (R.R.d.R.); (M.H.G.)
| | - Paulo J. T. Ferreira
- CIEPQPF, Department of Chemical Engineering, University of Coimbra, Pólo II, Rua Silvo Lima, 3030-790 Coimbra, Portugal; (J.F.S.P.); (P.J.T.F.)
| | - Henriqueta Louro
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
| | - Maria João Silva
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal; (C.M.); (J.C.); (M.V.); (F.P.); (H.L.); (M.J.S.)
- Center for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School-FCM, UNL, Rua Câmara Pestana, 6 Ed. CEDOC II, 1150-082 Lisbon, Portugal
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16
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Zanette RDSS, Fayer L, de Oliveira ER, Almeida CG, Oliveira CR, de Oliveira LFC, Maranduba CMC, Alvarenga ÉC, Brandão HM, Munk M. Cytocompatibility and osteogenic differentiation of stem cells from human exfoliated deciduous teeth with cotton cellulose nanofibers for tissue engineering and regenerative medicine. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022; 33:627-650. [PMID: 34807809 DOI: 10.1080/09205063.2021.2008787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cellulose nanofibers (CNFs) are natural polymers with physical-chemical properties that make them very attractive for modulating stem cell differentiation, a crucial step in tissue engineering and regenerative medicine. Although cellulose is cytocompatible, when materials are in nanoscale, they become more reactive, needing to evaluate its potential toxic effect to ensure safe application. This study aimed to investigate the cytocompatibility of cotton CNF and its differentiation capacity induction on stem cells from human exfoliated deciduous teeth. First, the cotton CNF was characterized. Then, the cytocompatibility and the osteogenic differentiation induced by cotton CNF were examined. The results revealed that cotton CNFs have about 6-18 nm diameters, and the zeta potential was -10 mV. Despite gene expression alteration, the cotton CNF shows good cytocompatibility. The cotton CNF induced an increase in phosphatase alkaline activity and extracellular matrix mineralization. The results indicate that cotton CNF has good cytocompatibility and can promote cell differentiation without using chemical inducers, showing great potential as a new differentiation inductor for tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Rafaella de S S Zanette
- Laboratory of Nanobiotechnology and Nanotoxicology, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Leonara Fayer
- Laboratory of Nanobiotechnology and Nanotoxicology, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Eduarda R de Oliveira
- Laboratory of Nanobiotechnology and Nanotoxicology, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Camila G Almeida
- Laboratory of Applied Nanotechnology for Animal Production and Health, Brazilian Agricultural Research Corporation (EMBRAPA), Juiz de Fora, Brazil
| | - Cauê R Oliveira
- National Laboratory of Nanotechnology for Agriculture, Embrapa Instrumentation, São Carlos, Brazil
| | - Luiz F C de Oliveira
- Nucleus of Spectroscopy and Molecular Structure, Department of Chemistry, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Carlos M C Maranduba
- Laboratory of Human Genetics and Cell Therapy, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | - Érika C Alvarenga
- Department of Natural Sciences, Federal University of São João Del Rei, São João del Rei, Brazil
| | - Humberto M Brandão
- Laboratory of Applied Nanotechnology for Animal Production and Health, Brazilian Agricultural Research Corporation (EMBRAPA), Juiz de Fora, Brazil
| | - Michele Munk
- Laboratory of Nanobiotechnology and Nanotoxicology, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
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17
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de Oliveira GR, de Andrade C, Sotomaior CS, Costa LB. Advances in nanotechnology and the benefits of using cellulose nanofibers in animal nutrition. Vet World 2022; 14:2843-2850. [PMID: 35017829 PMCID: PMC8743779 DOI: 10.14202/vetworld.2021.2843-2850] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 09/22/2021] [Indexed: 11/16/2022] Open
Abstract
The production of cellulose nanofibers promotes the utilization of plant residues that are generated in agro-industries during food processing. The utilization of these plant by-products reduces environmental contamination. Cellulose nanofibers are used in several sectors, including the drug, food, and animal nutrition industries. Many sources of nanofibers used in animal diets can be used as potential fiber substitutes after being processed to improve efficiency. For instance, including nanometric particles of plant fibers (<100 nm) in animal feed may provide excellent physical properties such as high reactivity, a large surface area, and improved nutrient absorption from the diet. Nanotechnology improves the characteristics of fibers that are important for gastrointestinal transit and their utilization as energy sources and substrates for microbial fermentation in the digestive tract of animals. Nanofibers can improve the synthesis of volatile fatty acids and the blood lipid profile, with positive effects on the intestinal health of animals. Moreover, in vitro and in vivo studies have demonstrated promising effects in reducing blood glucose levels without toxic effects on the body. Supplying nanofibers in the diet improve animal performance, increase productivity, and work toward a more sustainable economic development of agribusinesses. The quality of animal products such as meat, milk, and eggs is also reported to be improved with the inclusion of nanominerals in the feed. Overall, the application of nanotechnology to harness the by-products of agro-industries can increase economic viability and sustainability in animal production systems. Therefore, this review presents a current survey on the main research and advances in the utilization of nanotechnology, focusing on cellulose nanofibers in animal feed to improve animal performance.
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Affiliation(s)
- Geovane Rosa de Oliveira
- Graduate Program in Animal Science, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, PUCPR, Curitiba - PR, Brazil
| | - Carla de Andrade
- Graduate Program in Animal Science, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, PUCPR, Curitiba - PR, Brazil
| | - Cristina Santos Sotomaior
- Graduate Program in Animal Science, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, PUCPR, Curitiba - PR, Brazil
| | - Leandro Batista Costa
- Graduate Program in Animal Science, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, PUCPR, Curitiba - PR, Brazil
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18
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Insuasti‐Cruz E, Suárez‐Jaramillo V, Mena Urresta KA, Pila‐Varela KO, Fiallos‐Ayala X, Dahoumane SA, Alexis F. Natural Biomaterials from Biodiversity for Healthcare Applications. Adv Healthc Mater 2022; 11:e2101389. [PMID: 34643331 DOI: 10.1002/adhm.202101389] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 09/20/2021] [Indexed: 12/22/2022]
Abstract
Natural biomaterials originating during the growth cycles of all living organisms have been used for many applications. They span from bioinert to bioactive materials including bioinspired ones. As they exhibit an increasing degree of sophistication, natural biomaterials have proven suitable to address the needs of the healthcare sector. Here the different natural healthcare biomaterials, their biodiversity sources, properties, and promising healthcare applications are reviewed. The variability of their properties as a result of considered species and their habitat is also discussed. Finally, some limitations of natural biomaterials are discussed and possible future developments are provided as more natural biomaterials are yet to be discovered and studied.
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Affiliation(s)
- Erick Insuasti‐Cruz
- School of Biological Sciences & Engineering Yachay Tech University Urcuquí 100119 Ecuador
| | | | | | - Kevin O. Pila‐Varela
- School of Biological Sciences & Engineering Yachay Tech University Urcuquí 100119 Ecuador
| | - Xiomira Fiallos‐Ayala
- School of Biological Sciences & Engineering Yachay Tech University Urcuquí 100119 Ecuador
| | - Si Amar Dahoumane
- Department of Chemical Engineering Polytech Montreal Montreal Quebec H3C 3A7 Canada
- Center for Advances in Water and Air Quality (CAWAQ) Lamar University Beaumont TX 77710 USA
| | - Frank Alexis
- School of Biological Sciences & Engineering Yachay Tech University Urcuquí 100119 Ecuador
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Casanova F, Pereira CF, Ribeiro AB, Freixo R, Costa E, E. Pintado M, Fernandes JC, Ramos ÓL. Novel Micro- and Nanocellulose-Based Delivery Systems for Liposoluble Compounds. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2593. [PMID: 34685034 PMCID: PMC8540299 DOI: 10.3390/nano11102593] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/20/2021] [Accepted: 09/27/2021] [Indexed: 12/13/2022]
Abstract
Poor aqueous solubility of bioactive compounds is becoming a pronounced challenge in the development of bioactive formulations. Numerous liposoluble compounds have very interesting biological activities, but their low water solubility, stability, and bioavailability restrict their applications. To overcome these limitations there is a need to use enabling delivering strategies, which often demand new carrier materials. Cellulose and its micro- and nanostructures are promising carriers with unique features. In this context, this review describes the fast-growing field of micro- and nanocellulose based delivery systems with a focus on the release of liposoluble bioactive compounds. The state of research on this field is reviewed in this article, which also covers the chemistry, preparation, properties, and applications of micro- and nanocellulose based delivery systems. Although there are promising perspectives for introducing these materials into various fields, aspects of safety and toxicity must be revealed and are discussed in this review. The impact of gastrointestinal conditions on the systems and on the bioavailability of the bioactive compounds are also addressed in this review. This article helps to unveil the whole panorama of micro- and nanocellulose as delivery systems for liposoluble compounds, showing that these represent a great promise in a wide range of applications.
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Affiliation(s)
| | - Carla F. Pereira
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (F.C.); (A.B.R.); (R.F.); (E.C.); (M.E.P.); (J.C.F.)
| | | | | | | | | | | | - Óscar L. Ramos
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (F.C.); (A.B.R.); (R.F.); (E.C.); (M.E.P.); (J.C.F.)
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20
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Ravanbakhsh H, Bao G, Luo Z, Mongeau LG, Zhang YS. Composite Inks for Extrusion Printing of Biological and Biomedical Constructs. ACS Biomater Sci Eng 2021; 7:4009-4026. [PMID: 34510905 DOI: 10.1021/acsbiomaterials.0c01158] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Extrusion-based three-dimensional (3D) printing is an emerging technology for the fabrication of complex structures with various biological and biomedical applications. The method is based on the layer-by-layer construction of the product using a printable ink. The material used as the ink should possess proper rheological properties and desirable performances. Composite materials, which are extensively used in 3D printing applications, can improve the printability and offer superior performances for the printed constructs. Herein, we review composite inks with a focus on composite hydrogels. The properties of different additives including fibers and nanoparticles are discussed. The performances of various composite inks in biological and biomedical systems are delineated through analyzing the synergistic effects between the composite ink components. Different applications, including tissue engineering, tissue model engineering, soft robotics, and four-dimensional printing, are selected to demonstrate how 3D-printable composite inks are exploited to achieve various desired functionality. This review finally presents an outlook of future perspectives on the design of composite inks.
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Affiliation(s)
- Hossein Ravanbakhsh
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States.,Department of Mechanical Engineering, McGill University, Montreal, QC H3A0C3, Canada
| | - Guangyu Bao
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A0C3, Canada
| | - Zeyu Luo
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States.,Department of Orthopedics, West China Hospital, West China School of Medicine, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Luc G Mongeau
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A0C3, Canada
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States
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21
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Kumari P, Meena A. Application of enzyme-mediated cellulose nanofibers from lemongrass waste for the controlled release of anticancer drugs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:46343-46355. [PMID: 32215793 DOI: 10.1007/s11356-020-08358-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
In the present study, an application of cellulose nanofibers has been established for the controlled release of an anticancer drug, i.e., camptothecin. The camptothecin is known for its antitumor activity. However, it has certain limitations like instability, low solubility in aqueous solution, and biological fluids. Firstly, the camptothecin was encapsulated into the cellulose nanofiber complex by adjusting the composition ratio of cellulose nanofibers-camptothecin, i.e., 10:3, 10:5, and 10:7. In the 10:3 composition ratio of cellulose nanofibers, camptothecin showed the highest encapsulation efficiency, i.e., 65.28%. The binding of camptothecin with cellulose nanofibers was confirmed by FT-IR analysis. Also, the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm studies demonstrate physical adsorption of camptothecin onto the homogeneous as well as the heterogeneous surface of cellulose nanofibers. Further, the controlled and extended-release profile was observed at different physiological pH, and different kinetics models were used to understand the drug release mechanism. The highest correlation in all pH conditions was obtained in Korsmeyer-Peppas with R2 value = 0.93 (pH 1.2), 0.89 (pH 6.8), and 0.97 (pH 7.4), whereas in Higuchi model, R2 value = 0.89 (pH 1.2), 0.91 (pH 6.8), and 0.98 (pH 7.4), suggesting the release of a drug via a diffusion mechanism. Hence, the results established that enzyme-mediated cellulose nanofibers may also be an optimal carrier for the controlled drug release formulation without any chemical excipients.
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Affiliation(s)
- Priyanka Kumari
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, 226015, India
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Abha Meena
- Molecular Bioprospection Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, Uttar Pradesh, 226015, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India.
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22
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Souza E, Gottschalk L, Freitas-Silva O. Overview of Nanocellulose in Food Packaging. Recent Pat Food Nutr Agric 2021; 11:154-167. [PMID: 31322079 DOI: 10.2174/2212798410666190715153715] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 05/07/2019] [Accepted: 06/01/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND The rising concern with environmental preservation has led to increasing interest in biodegradable polymer composites from renewable sources, such as cellulose and its derivatives. The use of nanocellulose is an innovative food packaging trend. DISCUSSION This paper presents an overview and discusses the state of the art of different nanocellulose materials used in food and food packaging, and identifies important patents related to them. It is important to consider that before marketing, new products must be proven safe for consumers and the environment. CONCLUSION Several packaging materials using nanocellulose have been developed and shown to be promising for use as active and intelligent materials for food packaging. Other nanocellulose products are under investigation for packaging and may enter the market in the near future. Many countries have been adjusting their regulatory frameworks to deal with nanotechnologies, including nanocellulose packaging.
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Affiliation(s)
- Erika Souza
- Embrapa Food Agroindustry. Av. Das Americas, 29501, 23020-470, Rio de Janeiro, Brazil
| | - Leda Gottschalk
- Embrapa Food Agroindustry. Av. Das Americas, 29501, 23020-470, Rio de Janeiro, Brazil
| | - Otniel Freitas-Silva
- Embrapa Food Agroindustry. Av. Das Americas, 29501, 23020-470, Rio de Janeiro, Brazil
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23
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Recent Advances in the Synthesis of Nanocellulose Functionalized–Hybrid Membranes and Application in Water Quality Improvement. Processes (Basel) 2021. [DOI: 10.3390/pr9040611] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The increasing discharge of voluminous non or partially treated wastewaters characterized by complex contaminants poses significant ecological and health risks. Particularly, this practice impacts negatively on socio-economic, technological, industrial, and agricultural development. Therefore, effective control of water pollution is imperative. Over the past decade, membrane filtration has been established as an effective and commercially attractive technology for the separation and purification of water. The performance of membrane-based technologies relies on the intrinsic properties of the membrane barrier itself. As a result, the development of innovative techniques for the preparation of highly efficient membranes has received remarkable attention. Moreover, growing concerns related to cost-effective and greener technologies have induced the need for eco-friendly, renewable, biodegradable, and sustainable source materials for membrane fabrication. Recently, advances in nanotechnology have led to the development of new high-tech nanomaterials from natural polymers (e.g., cellulose) for the preparation of environmentally benign nanocomposite membranes. The synthesis of nanocomposite membranes using nanocelluloses (NCs) has become a prominent research field. This is attributed to the exceptional characteristics of these nanomaterials (NMs) namely; excellent and tuneable surface chemistry, high mechanical strength, low-cost, biodegradability, biocompatibility, and renewability. For this purpose, the current paper opens with a comprehensive yet concise description of the various types of NCs and their most broadly utilized production techniques. This is closely followed by a critical review of how NC substrates and their surface-modified versions affect the performance of the fabricated NC-based membranes in various filtration processes. Finally, the most recent processing technologies for the preparation of functionalized NCs-based composite membranes are discussed in detail and their hybrid characteristics relevant to membrane filtration processes are highlighted.
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Grego EA, Siddoway AC, Uz M, Liu L, Christiansen JC, Ross KA, Kelly SM, Mallapragada SK, Wannemuehler MJ, Narasimhan B. Polymeric Nanoparticle-Based Vaccine Adjuvants and Delivery Vehicles. Curr Top Microbiol Immunol 2021; 433:29-76. [PMID: 33165869 PMCID: PMC8107186 DOI: 10.1007/82_2020_226] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
As vaccine formulations have progressed from including live or attenuated strains of pathogenic components for enhanced safety, developing new adjuvants to more effectively generate adaptive immune responses has become necessary. In this context, polymeric nanoparticles have emerged as a promising platform with multiple advantages, including the dual capability of adjuvant and delivery vehicle, administration via multiple routes, induction of rapid and long-lived immunity, greater shelf-life at elevated temperatures, and enhanced patient compliance. This comprehensive review describes advances in nanoparticle-based vaccines (i.e., nanovaccines) with a particular focus on polymeric particles as adjuvants and delivery vehicles. Examples of the nanovaccine approach in respiratory infections, biodefense, and cancer are discussed.
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Affiliation(s)
- Elizabeth A Grego
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Alaric C Siddoway
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Metin Uz
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
- Departments of Nanovaccine Institute, Iowa State University, Ames, IA, 50011, USA
| | - Luman Liu
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - John C Christiansen
- Departments of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA, 50011, USA
| | - Kathleen A Ross
- Departments of Nanovaccine Institute, Iowa State University, Ames, IA, 50011, USA
| | - Sean M Kelly
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Surya K Mallapragada
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA
- Departments of Nanovaccine Institute, Iowa State University, Ames, IA, 50011, USA
| | - Michael J Wannemuehler
- Departments of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA, 50011, USA
- Departments of Nanovaccine Institute, Iowa State University, Ames, IA, 50011, USA
| | - Balaji Narasimhan
- Departments of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, USA.
- Departments of Nanovaccine Institute, Iowa State University, Ames, IA, 50011, USA.
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25
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Tortorella S, Vetri Buratti V, Maturi M, Sambri L, Comes Franchini M, Locatelli E. Surface-Modified Nanocellulose for Application in Biomedical Engineering and Nanomedicine: A Review. Int J Nanomedicine 2020; 15:9909-9937. [PMID: 33335392 PMCID: PMC7737557 DOI: 10.2147/ijn.s266103] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/07/2020] [Indexed: 01/22/2023] Open
Abstract
Presently, a plenty of concerns related to the environment are due to the overuse of petroleum-based chemicals and products; the synthesis of functional materials, starting from the natural sources, is the current trend in research. The interest for nanocellulose has recently increased in a huge range of fields, from the material science to the biomedical engineering. Nanocellulose gained this leading role because of several reasons: its natural abundance on this planet, the excellent mechanical and optical features, the good biocompatibility and the attractive capability of undergoing surface chemical modifications. Nanocellulose surface tuning techniques are adopted by the high reactivity of the hydroxyl groups available; the chemical modifications are mainly performed to introduce either charged or hydrophobic moieties that include amination, esterification, oxidation, silylation, carboxymethylation, epoxidation, sulfonation, thiol- and azido-functional capability. Despite the several already published papers regarding nanocellulose, the aim of this review involves discussing the surface chemical functional capability of nanocellulose and the subsequent applications in the main areas of nanocellulose research, such as drug delivery, biosensing/bioimaging, tissue regeneration and bioprinting, according to these modifications. The final goal of this review is to provide a novel and unusual overview on this topic that is continuously under expansion for its intrinsic sophisticated properties.
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Affiliation(s)
- Silvia Tortorella
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Bologna40136, Italy
| | - Veronica Vetri Buratti
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Bologna40136, Italy
| | - Mirko Maturi
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Bologna40136, Italy
| | - Letizia Sambri
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Bologna40136, Italy
| | - Mauro Comes Franchini
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Bologna40136, Italy
| | - Erica Locatelli
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum – University of Bologna, Bologna40136, Italy
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Joseph B, K SV, Sabu C, Kalarikkal N, Thomas S. Cellulose nanocomposites: Fabrication and biomedical applications. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2020. [DOI: 10.1016/j.jobab.2020.10.001] [Citation(s) in RCA: 123] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Nehra P, Chauhan RP. Eco-friendly nanocellulose and its biomedical applications: current status and future prospect. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 32:112-149. [PMID: 32892717 DOI: 10.1080/09205063.2020.1817706] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cellulose is the earth's leading natural polymer. It is known for its properties like biocompatibility, high mechanical strength, cost-effectiveness and lightweight. Nanocellulose displays better properties as compared to the native cellulose fibre. The nanocellulose is very remunerative in the arenas of routine application especially in health care, food industry, sanitary products and many more. In the biomedical area, cellulose-based products are utilized in applications like wound healing, dental applications, drug delivery, antimicrobial material, etc. Nanocellulose biomaterials have been commercialised, representing the material of new generation. With the objective to comprehend the contribution of nanocellulose in the current status and future development in biomedical utilisations, the review is focused on cellulose, nanocellulose, types and sources of nanocellulose, its preparation, characteristics, constraints related to its composites through the analysis of certain scientific reports.
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Affiliation(s)
- Poonam Nehra
- School of Biomedical Engineering, National Institute of Technology, Kurukshetra, India
| | - R P Chauhan
- Department of Physics, National Institute of Technology, Kurukshetra, India
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28
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Stoudmann N, Schmutz M, Hirsch C, Nowack B, Som C. Human hazard potential of nanocellulose: quantitative insights from the literature. Nanotoxicology 2020; 14:1241-1257. [DOI: 10.1080/17435390.2020.1814440] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Natasha Stoudmann
- Technology and Society, Swiss Federal Laboratories for Materials Science and Technology (Empa), St.Gallen, Switzerland
| | - Mélanie Schmutz
- Technology and Society, Swiss Federal Laboratories for Materials Science and Technology (Empa), St.Gallen, Switzerland
| | - Cordula Hirsch
- Particles-Biology Interations, Swiss Federal Laboratories for Materials Science and Technology (Empa), St.Gallen, Switzerland
| | - Bernd Nowack
- Technology and Society, Swiss Federal Laboratories for Materials Science and Technology (Empa), St.Gallen, Switzerland
| | - Claudia Som
- Technology and Society, Swiss Federal Laboratories for Materials Science and Technology (Empa), St.Gallen, Switzerland
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29
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Abdul Khalil H, Adnan A, Yahya EB, Olaiya N, Safrida S, Hossain MS, Balakrishnan V, Gopakumar DA, Abdullah C, Oyekanmi A, Pasquini D. A Review on Plant Cellulose Nanofibre-Based Aerogels for Biomedical Applications. Polymers (Basel) 2020; 12:E1759. [PMID: 32781602 PMCID: PMC7465206 DOI: 10.3390/polym12081759] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/01/2020] [Accepted: 08/03/2020] [Indexed: 01/18/2023] Open
Abstract
Cellulose nanomaterials from plant fibre provide various potential applications (i.e., biomedical, automotive, packaging, etc.). The biomedical application of nanocellulose isolated from plant fibre, which is a carbohydrate-based source, is very viable in the 21st century. The essential characteristics of plant fibre-based nanocellulose, which include its molecular, tensile and mechanical properties, as well as its biodegradability potential, have been widely explored for functional materials in the preparation of aerogel. Plant cellulose nano fibre (CNF)-based aerogels are novel functional materials that have attracted remarkable interest. In recent years, CNF aerogel has been extensively used in the biomedical field due to its biocompatibility, renewability and biodegradability. The effective surface area of CNFs influences broad applications in biological and medical studies such as sustainable antibiotic delivery for wound healing, the preparation of scaffolds for tissue cultures, the development of drug delivery systems, biosensing and an antimicrobial film for wound healing. Many researchers have a growing interest in using CNF-based aerogels in the mentioned applications. The application of cellulose-based materials is widely reported in the literature. However, only a few studies discuss the potential of cellulose nanofibre aerogel in detail. The potential applications of CNF aerogel include composites, organic-inorganic hybrids, gels, foams, aerogels/xerogels, coatings and nano-paper, bioactive and wound dressing materials and bioconversion. The potential applications of CNF have rarely been a subject of extensive review. Thus, extensive studies to develop materials with cheaper and better properties, high prospects and effectiveness for many applications are the focus of the present work. The present review focuses on the evolution of aerogels via characterisation studies on the isolation of CNF-based aerogels. The study concludes with a description of the potential and challenges of developing sustainable materials for biomedical applications.
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Affiliation(s)
- H.P.S. Abdul Khalil
- School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia; (E.B.Y.); (M.S.H.); (D.A.G.); (C.K.A.); (A.A.O.)
| | - A.S. Adnan
- Management Science University Medical Centre, University Drive, Off Persiaran Olahraga, Section 13, Shah Alam Selangor 40100, Malaysia
| | - Esam Bashir Yahya
- School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia; (E.B.Y.); (M.S.H.); (D.A.G.); (C.K.A.); (A.A.O.)
| | - N.G. Olaiya
- Department of Industrial and Production Engineering, Federal University of Technology, Akure 340271, Nigeria;
| | - Safrida Safrida
- Department of Biology Education, Faculty of Teacher Training and Education, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia;
| | - Md. Sohrab Hossain
- School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia; (E.B.Y.); (M.S.H.); (D.A.G.); (C.K.A.); (A.A.O.)
| | - Venugopal Balakrishnan
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, Penang 11800, Malaysia;
| | - Deepu A. Gopakumar
- School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia; (E.B.Y.); (M.S.H.); (D.A.G.); (C.K.A.); (A.A.O.)
| | - C.K. Abdullah
- School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia; (E.B.Y.); (M.S.H.); (D.A.G.); (C.K.A.); (A.A.O.)
| | - A.A. Oyekanmi
- School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia; (E.B.Y.); (M.S.H.); (D.A.G.); (C.K.A.); (A.A.O.)
| | - Daniel Pasquini
- Chemistry Institute, Federal University of Uberlandia-UFU, Campus Santa Monica-Bloco1D-CP 593, Uberlandia 38400-902, Brazil;
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Čolić M, Tomić S, Bekić M. Immunological aspects of nanocellulose. Immunol Lett 2020; 222:80-89. [PMID: 32278785 DOI: 10.1016/j.imlet.2020.04.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/21/2020] [Accepted: 04/04/2020] [Indexed: 12/31/2022]
Abstract
Cellulose is the most abundant natural polymer in the world. Nanoscale forms of cellulose, including cellulose nanofibers (CNF), cellulose nanocrystals (CNC) and bacterial nanocellulose (BC), are very attractive in industry, medicine and pharmacy. Biomedical applications of nanocellulose in tissue engineering, regenerative medicine, and controlled drug delivery are the most promising. Nanocellulose is considered a biocompatible nanomaterial and relatively safe for biomedical applications. However, more studies are needed to prove this hypothesis, especially those related to chronic exposure to nanocellulose. Besides toxicity, the response of the immune system is of particular importance in this sense. This paper provides a comprehensive and critical review of the current-state knowledge of the impact of nanocellulose on the immune system, especially on macrophages and dendritic cells (DC), as the central immunoregulatory cells, which has not been addressed in the literature sufficiently. Nanocellulose, especially CNC, can induce the inflammatory response upon the internalization by macrophages, but this reaction may be significantly modulated by introducing different functional groups on their surface. Our original results showed that nanocellulose has a potent immunotolerogenic potential. Native CNF potentiated the capacity of DC to induce conventional Tregs. When carboxyl groups were introduced on the CNF surface, the tolerogenic potential of DC was shifted towards the induction of regulatory CD8+ T cells, whereas the introduction of phosphonates on CNF surface potentiated DCs' capacity to induce both regulatory CD8+ T cells and Type 1 regulatory (Tr-1) cells. These results are extremely important when considering the application of nanocellulose in vivo, especially for tissue regeneration and wound healing.
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Affiliation(s)
- Miodrag Čolić
- Institute for the Application of Nuclear Energy, University of Belgrade, Serbia; University of East Sarajevo, Medical Faculty Foča, R.Srpska, BiH; Serbian Academy of Sciences and Arts, Belgrade, Serbia.
| | - Sergej Tomić
- Institute for the Application of Nuclear Energy, University of Belgrade, Serbia
| | - Marina Bekić
- Institute for the Application of Nuclear Energy, University of Belgrade, Serbia
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Singh S, Dutt D, Kaur P, Singh H, Mishra NC. Microfibrous paper scaffold for tissue engineering application. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:1091-1106. [DOI: 10.1080/09205063.2020.1740965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Sandhya Singh
- Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee, India
| | - Dharam Dutt
- Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee, India
| | - Parminder Kaur
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Hemant Singh
- Department of Polymer & Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Narayan Chand Mishra
- Department of Polymer & Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
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Bacterial cellulose sponges obtained with green cross-linkers for tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110740. [PMID: 32204048 DOI: 10.1016/j.msec.2020.110740] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 12/20/2019] [Accepted: 02/09/2020] [Indexed: 01/31/2023]
Abstract
Three-dimensional (3D) porous structures with controlled pore size and interconnected pores, good mechanical properties and biocompatibility are of great interest for tissue engineering. In this work we propose a new strategy to obtain highly porous 3D structures with improved properties using bacterial cellulose (BC) and eco-friendly additives and processes. Glucose, vanillin and citric acid were used as non-toxic and cheap cross-linkers and γ-aminopropyltriethoxysilane was used to partially replace the surface OH groups of cellulose with amino groups. The efficiency of grafting and cross-linking reactions was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The morphological investigation of BC sponges revealed a multi-hierarchical organization after functionalization and cross-linking. Micro-computed tomography analysis showed 80-90% open porosity in modified BC sponges. The thermal and mechanical properties of the sponges were influenced by the cross-linker type and concentration. The strength-to-weight ratio of BC sponges cross-linked with glucose and citric acid was 150% and 120% higher compared to that of unmodified BC sponge. In vitro assays revealed that the modified BC sponges are non-cytotoxic and do not trigger an inflammatory response in macrophages. This study provides a simple and green method to obtain highly porous cellulose sponges with hierarchical design, biocompatibility and good mechanical properties.
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Kumari P, Pathak G, Gupta R, Sharma D, Meena A. Cellulose nanofibers from lignocellulosic biomass of lemongrass using enzymatic hydrolysis: characterization and cytotoxicity assessment. ACTA ACUST UNITED AC 2019; 27:683-693. [PMID: 31654377 DOI: 10.1007/s40199-019-00303-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 09/23/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND The lemongrass (LG) leaves could be a useful source of cellulose after its oil extraction, which is still either dumped or burned, not considered as a cost-effective approach. The synthesis of cellulose nanofibers (CNF) from LG waste has emerged as a beneficial alternative in the value-added applications. The non-toxicity, biodegradability, and biocompatibility of CNF have raised the interest in its manufacturing. METHOD In the present study, we have isolated and characterized CNFs using enzymatic hydrolysis. We also explored the cytotoxic properties of the final material. The obtained products were characterized using dynamic light scattering (DLS), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), and thermogravimetric/differential thermal gravimetric analysis (TG/DTG). The cytotoxicity of CNF was assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay against three different cancer cell lines NCIH460, PA1, and L132 cells. RESULTS The FT-IR results showed that the resulting sample was of cellulose species, and CNF was found free from the non-cellulosic components like lignin and hemicellulose. The SEM micrographs of the cellulose showed a bundle like structure. The TEM micrographs of CNF showed diverse long fibers structure with 105.7 nm particle size analysed using DLS. The TGA analysis revealed that the thermal stability was slightly lower, compared to cellulose. Additionally, CNF did not show the cytotoxic effect at the tested concentrations (~10-1000 μg/ml) in any of the cell lines. CONCLUSION Overall, the results concluded that LG waste-derived CNF is a potential sustainable material and could be employed as a favourable reinforcing agent or nanocarriers in diverse areas, mainly in food and drug delivery sectors. Graphical abstract Systematic representation of the synthesis of the cellulose nanofibers: The lignocellulosic waste of lemongrass (after oil extraction) was pretreated for the isolation of raw cellulose, followed by enzyme hydrolysis for the synthesis of pure cellulose nanofibers.
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Affiliation(s)
- Priyanka Kumari
- Molecular Bioprospection Department, Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow, Uttar Pradesh, 226 015, India.,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Gauri Pathak
- Molecular Bioprospection Department, Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow, Uttar Pradesh, 226 015, India
| | - Ruby Gupta
- Institute of Nano Science and Technology, Habitat Centre, Sector-64, Phase-X, Mohali, Punjab, 160062, India
| | - Deepika Sharma
- Institute of Nano Science and Technology, Habitat Centre, Sector-64, Phase-X, Mohali, Punjab, 160062, India
| | - Abha Meena
- Molecular Bioprospection Department, Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow, Uttar Pradesh, 226 015, India. .,Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Torres FG, Troncoso OP, Pisani A, Gatto F, Bardi G. Natural Polysaccharide Nanomaterials: An Overview of Their Immunological Properties. Int J Mol Sci 2019; 20:E5092. [PMID: 31615111 PMCID: PMC6834193 DOI: 10.3390/ijms20205092] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/08/2019] [Accepted: 10/12/2019] [Indexed: 12/20/2022] Open
Abstract
Natural occurring polymers, or biopolymers, represent a huge part of our planet biomass. They are formed by long chains of monomers of the same type or a combination of different ones. Polysaccharides are biopolymers characterized by complex secondary structures performing several roles in plants, animals, and microorganisms. Because of their versatility and biodegradability, some of them are extensively used for packaging, food, pharmaceutical, and biomedical industries as sustainable and renewable materials. In the recent years, their manipulation at the nanometric scale enormously increased the range of potential applications, boosting an interdisciplinary research attempt to exploit all the potential advantages of nanostructured polysaccharides. Biomedical investigation mainly focused on nano-objects aimed at drug delivery, tissue repair, and vaccine adjuvants. The achievement of all these applications requires the deep knowledge of polysaccharide nanomaterials' interactions with the immune system, which orchestrates the biological response to any foreign substance entering the body. In the present manuscript we focused on natural polysaccharides of high commercial importance, namely, starch, cellulose, chitin, and its deacetylated form chitosan, as well as the seaweed-derived carrageenan and alginate. We reviewed the available information on their biocompatibility, highlighting the importance of their physicochemical feature at the nanoscale for the modulation of the immune system.
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Affiliation(s)
- Fernando G Torres
- Department of Mechanical Engineering, Pontificia Universidad Catolica del Peru, Av. Universitaria 1801, Lima 32, Peru.
| | - Omar P Troncoso
- Department of Mechanical Engineering, Pontificia Universidad Catolica del Peru, Av. Universitaria 1801, Lima 32, Peru.
| | - Anissa Pisani
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31,16146 Genova, Italy.
| | - Francesca Gatto
- Drug Discovery and Development Department, Istituto Italiano di Tecnologia, Via Morego, 30, 16163 Genova, Italy.
| | - Giuseppe Bardi
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
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Zanette RSS, de Almeida LBF, Souza NLGD, de Almeida CG, de Oliveira LFC, de Matos EM, Gern JC, Brandão HM, Munk M. Cotton cellulose nanofiber/chitosan nanocomposite: characterization and evaluation of cytocompatibility. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:1489-1504. [DOI: 10.1080/09205063.2019.1646627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | | | - Nelson L. G. D. Souza
- Department of Exact Sciences and Biotechnology, Federal University of Tocantins, Chácaras, Brazil
| | | | | | - Elyabe M. de Matos
- Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | | | | | - Michele Munk
- Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Brazil
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Ngwabebhoh FA, Yildiz U. Nature‐derived fibrous nanomaterial toward biomedicine and environmental remediation: Today's state and future prospects. J Appl Polym Sci 2019. [DOI: 10.1002/app.47878] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Fahanwi Asabuwa Ngwabebhoh
- Department of ChemistryKocaeli University Umuttepe Campus, 41380 Kocaeli Turkey
- Centre of Polymer SystemsUniversity Institute, Tomas Bata University in Zlin Tr. T. Bati 5678, 76001 Zlin Czech Republic
| | - Ufuk Yildiz
- Department of ChemistryKocaeli University Umuttepe Campus, 41380 Kocaeli Turkey
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De France KJ, Badv M, Dorogin J, Siebers E, Panchal V, Babi M, Moran-Mirabal J, Lawlor M, Cranston ED, Hoare T. Tissue Response and Biodistribution of Injectable Cellulose Nanocrystal Composite Hydrogels. ACS Biomater Sci Eng 2019; 5:2235-2246. [PMID: 33405775 DOI: 10.1021/acsbiomaterials.9b00522] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interest in cellulose nanocrystal (CNC)-based hydrogels for drug delivery, tissue engineering, and other biomedical applications has rapidly expanded despite the minimal in vivo research reported to date. Herein, we assess both in vitro protein adsorption and cell adhesion as well as in vivo subcutaneous tissue responses and CNC biodistribution of injectable CNC-poly(oligoethylene glycol methacrylate) (POEGMA) hydrogels. Hydrogels with different PEG side chain lengths, CNC loadings, and with or without in situ magnetic alignment of the CNCs are compared. CNC loading has a minimal impact on protein adsorption but significantly increases cell adhesion. In vivo, both CNC-only and CNC-POEGMA injections largely stay at their subcutaneous injection site over one month, with minimal bioaccumulation of CNCs in any typical clearance organ. CNC-POEGMA hydrogels exhibit mild acute and chronic inflammatory responses, although significant fibroblast penetration was observed with the magnetically aligned hydrogels. Collectively, these results suggest that CNC-POEGMA hydrogels offer promise in practical biomedical applications.
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Affiliation(s)
| | | | | | - Emily Siebers
- Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226, United States
| | | | | | | | - Michael Lawlor
- Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226, United States
| | - Emily D Cranston
- Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada.,Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbus V6T 1Z3, Canada
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Boda SK, Almoshari Y, Wang H, Wang X, Reinhardt RA, Duan B, Wang D, Xie J. Mineralized nanofiber segments coupled with calcium-binding BMP-2 peptides for alveolar bone regeneration. Acta Biomater 2019; 85:282-293. [PMID: 30605770 PMCID: PMC6679595 DOI: 10.1016/j.actbio.2018.12.051] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/19/2018] [Accepted: 12/29/2018] [Indexed: 01/08/2023]
Abstract
Bone loss around tooth extraction sites can occur, thus making future placement of dental implants difficult. Alveolar bone regeneration can be guided by the application of a nanofibrous bone graft coupled with osteoinductive proteins/peptides, following tooth loss or tooth extraction. In the present study, we demonstrate the potential of mineralized nanofiber segments coupled with calcium-binding bone morphogenetic protein 2 (BMP-2) mimicking peptides for periodontal bone regeneration. Thin electrospun nanofiber membranes of PLGA-collagen-gelatin (2:1:1 wt ratios) were mineralized in 10× modified simulated body fluid (10× mSBF) and cryocut to segments of 20 µm. For predetermined weights of the mineralized nanofiber segments, it was possible to load various amounts of heptaglutamate E7-domain-conjugated BMP-2 peptide. Mineralized short fiber grafts (2 mg), with and without E7-BMP-2 peptides, were implanted into 2 mm × 2 mm (diameter × depth) critical-sized socket defects created in rat maxillae, following extraction of the first molar teeth. A sustained release profile of E7-BMP-2 from the mineralized nanofiber segments was recorded over 4 weeks. X-ray microcomputed tomography (µ-CT) analysis of peptide-loaded nanofiber graft filled defects revealed ∼3 times greater new bone volume and bone mineral density over 4 weeks in comparison to unfilled control defects. Further, histopathology data confirmed the formation of greater new osseous tissue in the BMP2 peptide-loaded, mineralized nanofiber segment group than that of fibrous connective tissue in the unfilled defect group. Altogether, the mineralized nanofiber segments coupled with E7-BMP-2 peptides may be an effective treatment option for alveolar bone loss and defects. STATEMENT OF SIGNIFICANCE: With the high incidence of dental implants/fixtures for missing teeth, the success of the surgical procedures in restorative dentistry is dictated by the quality and quantity of the supporting alveolar bone. To address the problem of alveolar bone loss and defects due to tumor, periodontitis, or even postextraction remodeling, the present study is the first report on the application of mineralized nanofiber fragments coupled with calcium-binding osteoinductive BMP-2 peptides as a synthetic graft material for oral bone regeneration. The ease of fabrication and application of cryocut mineralized nanofiber fragments as maxillofacial bone defect fillers present a promising alternative to the current dental bone graft formulations. Furthermore, the nanofiber segments may also be utilized for several biomedical applications including hemostasis, soft tissue engineering, and wound healing.
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Affiliation(s)
- Sunil Kumar Boda
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Yosif Almoshari
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Hongjun Wang
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Xiaoyan Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Richard A Reinhardt
- Department of Surgical Specialties, College of Dentistry, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Bin Duan
- Division of Cardiology, Department of Internal Medicine and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198 United States
| | - Dong Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States.
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Sheikhi A, Hayashi J, Eichenbaum J, Gutin M, Kuntjoro N, Khorsandi D, Khademhosseini A. Recent advances in nanoengineering cellulose for cargo delivery. J Control Release 2019; 294:53-76. [PMID: 30500355 PMCID: PMC6385607 DOI: 10.1016/j.jconrel.2018.11.024] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/16/2018] [Accepted: 11/25/2018] [Indexed: 12/26/2022]
Abstract
The recent decade has witnessed a growing demand to substitute synthetic materials with naturally-derived platforms for minimizing their undesirable footprints in biomedicine, environment, and ecosystems. Among the natural materials, cellulose, the most abundant biopolymer in the world with key properties, such as biocompatibility, biorenewability, and sustainability has drawn significant attention. The hierarchical structure of cellulose fibers, one of the main constituents of plant cell walls, has been nanoengineered and broken down to nanoscale building blocks, providing an infrastructure for nanomedicine. Microorganisms, such as certain types of bacteria, are another source of nanocelluloses known as bacterial nanocellulose (BNC), which benefit from high purity and crystallinity. Chemical and mechanical treatments of cellulose fibrils made up of alternating crystalline and amorphous regions have yielded cellulose nanocrystals (CNC), hairy CNC (HCNC), and cellulose nanofibrils (CNF) with dimensions spanning from a few nanometers up to several microns. Cellulose nanocrystals and nanofibrils may readily bind drugs, proteins, and nanoparticles through physical interactions or be chemically modified to covalently accommodate cargos. Engineering surface properties, such as chemical functionality, charge, area, crystallinity, and hydrophilicity, plays a pivotal role in controlling the cargo loading/releasing capacity and rate, stability, toxicity, immunogenicity, and biodegradation of nanocellulose-based delivery platforms. This review provides insights into the recent advances in nanoengineering cellulose crystals and fibrils to develop vehicles, encompassing colloidal nanoparticles, hydrogels, aerogels, films, coatings, capsules, and membranes, for the delivery of a broad range of bioactive cargos, such as chemotherapeutic drugs, anti-inflammatory agents, antibacterial compounds, and probiotics. SYNOPSIS: Engineering certain types of microorganisms as well as the hierarchical structure of cellulose fibers, one of the main building blocks of plant cell walls, has yielded unique families of cellulose-based nanomaterials, which have leveraged the effective delivery of bioactive molecules.
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Affiliation(s)
- Amir Sheikhi
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Joel Hayashi
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - James Eichenbaum
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Mark Gutin
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Nicole Kuntjoro
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Danial Khorsandi
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Ali Khademhosseini
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; Department of Radiological Sciences, David Geffen School of Medicine, University of California - Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90095, USA; Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, 5531 Boelter Hall, Los Angeles, CA 90095, USA; Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Seoul 143-701, Republic of Korea.
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40
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Tibolla H, Pelissari FM, Martins JT, Lanzoni EM, Vicente AA, Menegalli FC, Cunha RL. Banana starch nanocomposite with cellulose nanofibers isolated from banana peel by enzymatic treatment: In vitro cytotoxicity assessment. Carbohydr Polym 2018; 207:169-179. [PMID: 30599996 DOI: 10.1016/j.carbpol.2018.11.079] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 11/20/2018] [Accepted: 11/23/2018] [Indexed: 10/27/2022]
Abstract
The potential use of cellulose nanofibers (CNFs) as a reinforcing agent in banana starch-based nanocomposite films was investigated. CNFs were isolated from banana peel (Musa paradisiaca) by enzymatic hydrolysis. Banana starch-based nanocomposite films were prepared with CNFs using the casting method. CNFs effect on cell viability and on nanocomposite films properties' was investigated. The cytotoxicity of CNFs was assessed on Caco-2 cell line. CNFs were not cytotoxic at 50-2000 μg/mL. However, CNFs above 2000 μg/mL significantly decreased cell viability. Topography analysis showed that the incorporation of CNFs modified the film structure. The nanocomposites exhibited a complex structure due to strong interactions between CNFs and starch matrix, promoting a remarkable improvement on mechanical and water barrier properties, opacity and UV light barrier compared to the control film. CNFs can offer a great potential as reinforcing material for starch-based nanocomposite films, producing a value-added food packaging from a waste material.
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Affiliation(s)
- H Tibolla
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, CEP 13083-862, Brazil.
| | - F M Pelissari
- Institute of Science and Technology, Food Engineering, University of Jequitinhonha and Mucuri, Diamantina, MG, CEP 39100-000, Brazil
| | - J T Martins
- CEB - Centre of Biological Engineering, University of Minho, 4710-057, Braga, Portugal
| | - E M Lanzoni
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970, Campinas, SP, Brazil; São Paulo State University (UNESP), Institute of Science and Technology, Sorocaba, Brazil
| | - A A Vicente
- CEB - Centre of Biological Engineering, University of Minho, 4710-057, Braga, Portugal
| | - F C Menegalli
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, CEP 13083-862, Brazil
| | - R L Cunha
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, SP, CEP 13083-862, Brazil
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41
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Silva CR, Babo PS, Gulino M, Costa L, Oliveira JM, Silva-Correia J, Domingues RM, Reis RL, Gomes ME. Injectable and tunable hyaluronic acid hydrogels releasing chemotactic and angiogenic growth factors for endodontic regeneration. Acta Biomater 2018; 77:155-171. [PMID: 30031163 DOI: 10.1016/j.actbio.2018.07.035] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/13/2018] [Accepted: 07/17/2018] [Indexed: 12/25/2022]
Abstract
Bioengineered soft tissues on any meaningful scale or complexity must incorporate aspects of the functional tissue, namely a vasculature, providing cells oxygen and nutrients critical for their survival. However, the ability of tissue engineering strategies to promote a fast revascularization is critically limited. Particularly in endodontic regenerative therapies, the complicated anatomy of the root canal system, and the narrow apical access limit the supply of new blood vessels and pulp tissue ingrowth. Here we characterize the viscoelastic and microstructural properties of a class of injectable hyaluronic acid (HA) hydrogels formed in situ, reinforced with cellulose nanocrystals (CNCs) and enriched with platelet lysate (PL), and test its ability to promote cells recruitment and proangiogenic activity in vitro. The incorporation of CNCs enhanced the stability of the materials against hydrolytic and enzymatic degradation. Moreover, the release of the chemotactic and pro-angiogenic growth factors (GFs) (PDGF and VEGF) from the PL-laden hydrogels showed an improved sustained profile proportional to the amount of incorporated CNCs. The PL-laden hydrogels exhibited preferential supportive properties of encapsulated human dental pulp cells (hDPCs) in in vitro culture conditions. Finally, PL-laden hydrogels stimulated chemotactic and pro-angiogenic activity by promoting hDPCs recruitment and cell sprouting in hDPCs/human umbilical vein endothelial cell co-cultures in vitro, and in an ex vivo model. These results support the use of the combined system as a scaffold for GFs delivery and cells recruitment, thereby exhibiting great clinical potential in treating injuries in vascularized tissues. STATEMENT OF SIGNIFICANCE Innovative strategies for improved chemotactic and pro-angiogenic features of TE constructs are needed. In this study, we developed an injectable HA/CNC/PL hydrogel with improved structural and biologic properties, that not only provide a sustained release of chemotactic and proangiogenic GFs from PL but also enhance the cells' viability and angiogenic activity. As a result of their unique traits, the developed hydrogels are ideally suited to simultaneously act as a GFs controlled delivery system and as a supportive matrix for cell culture, recruitment, and revascularization induction, holding great potential for the regeneration of vascularized soft tissues, such as the dentin-pulp complex.
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42
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Ventura C, Lourenço AF, Sousa-Uva A, Ferreira PJ, Silva MJ. Evaluating the genotoxicity of cellulose nanofibrils in a co-culture of human lung epithelial cells and monocyte-derived macrophages. Toxicol Lett 2018; 291:173-183. [PMID: 29679712 DOI: 10.1016/j.toxlet.2018.04.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 04/12/2018] [Accepted: 04/14/2018] [Indexed: 02/08/2023]
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43
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Ilves M, Vilske S, Aimonen K, Lindberg HK, Pesonen S, Wedin I, Nuopponen M, Vanhala E, Højgaard C, Winther JR, Willemoës M, Vogel U, Wolff H, Norppa H, Savolainen K, Alenius H. Nanofibrillated cellulose causes acute pulmonary inflammation that subsides within a month. Nanotoxicology 2018; 12:729-746. [DOI: 10.1080/17435390.2018.1472312] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Marit Ilves
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Sara Vilske
- Finnish Institute of Occupational Health, Helsinki, Finland
| | - Kukka Aimonen
- Finnish Institute of Occupational Health, Helsinki, Finland
| | | | - Saila Pesonen
- Finnish Institute of Occupational Health, Helsinki, Finland
| | | | | | - Esa Vanhala
- Finnish Institute of Occupational Health, Helsinki, Finland
| | - Casper Højgaard
- Liderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Jakob R. Winther
- Liderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Martin Willemoës
- Liderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Henrik Wolff
- Finnish Institute of Occupational Health, Helsinki, Finland
| | - Hannu Norppa
- Finnish Institute of Occupational Health, Helsinki, Finland
| | - Kai Savolainen
- Finnish Institute of Occupational Health, Helsinki, Finland
| | - Harri Alenius
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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44
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Tibolla H, Pelissari F, Martins J, Vicente A, Menegalli F. Cellulose nanofibers produced from banana peel by chemical and mechanical treatments: Characterization and cytotoxicity assessment. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2017.08.027] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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45
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Islam MS, Chen L, Sisler J, Tam KC. Cellulose nanocrystal (CNC)–inorganic hybrid systems: synthesis, properties and applications. J Mater Chem B 2018; 6:864-883. [DOI: 10.1039/c7tb03016a] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cellulose nanocrystal (CNC), a class of sustainable nanomaterial derived from forest and agro-biomass can serve as nature's storage for carbon dioxide.
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Affiliation(s)
- M. S. Islam
- Department of Chemical Engineering
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - L. Chen
- Department of Chemical Engineering
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - J. Sisler
- Department of Chemical Engineering
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - K. C. Tam
- Department of Chemical Engineering
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
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46
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Jimenez AS, Jaramillo F, Hemraz UD, Boluk Y, Ckless K, Sunasee R. Effect of surface organic coatings of cellulose nanocrystals on the viability of mammalian cell lines. Nanotechnol Sci Appl 2017; 10:123-136. [PMID: 29033558 PMCID: PMC5628661 DOI: 10.2147/nsa.s145891] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Cellulose nanocrystals (CNCs) have emerged as promising candidates for a number of bio-applications. Surface modification of CNCs continues to gain significant research interest as it imparts new properties to the surface of the nanocrystals for the design of multifunctional CNCs-based materials. A small chemical surface modification can potentially lead to drastic behavioral changes of cell-material interactions thereby affecting the intended bio-application. In this work, unmodified CNCs were covalently decorated with four different organic moieties such as a diaminobutane fragment, a cyclic oligosaccharide (β-cyclodextrin), a thermoresponsive polymer (poly[N-isopropylacrylamide]), and a cationic aminomethacrylamide-based polymer using different synthetic covalent methods. The effect of surface coatings of CNCs and the respective dose-response of the above organic moieties on the cell viability were evaluated on mammalian cell cultures (J774A.1 and MFC-7), using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphe-nyltetrazolium bromide and lactate dehydrogenase assays. Overall, the results indicated that cells exposed to surface-coated CNCs for 24 h did not display major changes in cell viability, membrane permeability as well as cell morphology. However, with longer exposure, all these parameters were somewhat affected, which appears not to be correlated with either anionic or cationic surface coatings of CNCs used in this study.
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Affiliation(s)
- Ambar S Jimenez
- Department of Chemistry, State University of New York at Plattsburgh, Plattsburgh, NY, USA
| | - Francesca Jaramillo
- Department of Chemistry, State University of New York at Plattsburgh, Plattsburgh, NY, USA
| | | | - Yaman Boluk
- Department of Civil & Environmental Engineering, University of Alberta and National Institute for Nanotechnology, National Research Council, Edmonton, AB, Canada
| | - Karina Ckless
- Department of Chemistry, State University of New York at Plattsburgh, Plattsburgh, NY, USA
| | - Rajesh Sunasee
- Department of Chemistry, State University of New York at Plattsburgh, Plattsburgh, NY, USA
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47
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Iavicoli I, Leso V, Beezhold DH, Shvedova AA. Nanotechnology in agriculture: Opportunities, toxicological implications, and occupational risks. Toxicol Appl Pharmacol 2017; 329:96-111. [PMID: 28554660 PMCID: PMC6380358 DOI: 10.1016/j.taap.2017.05.025] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/17/2017] [Accepted: 05/22/2017] [Indexed: 12/18/2022]
Abstract
Nanotechnology has the potential to make a beneficial impact on several agricultural, forestry, and environmental challenges, such as urbanization, energy constraints, and sustainable use of resources. However, new environmental and human health hazards may emerge from nano-enhanced applications. This raises concerns for agricultural workers who may become primarily exposed to such xenobiotics during their job tasks. The aim of this review is to discuss promising solutions that nanotechnology may provide in agricultural activities, with a specific focus on critical aspects, challenging issues, and research needs for occupational risk assessment and management in this emerging field. Eco-toxicological aspects were not the focus of the review. Nano-fertilizers, (nano-sized nutrients, nano-coated fertilizers, or engineered metal-oxide or carbon-based nanomaterials per se), and nano-pesticides, (nano-formulations of traditional active ingredients or inorganic nanomaterials), may provide a targeted/controlled release of agrochemicals, aimed to obtain their fullest biological efficacy without over-dosage. Nano-sensors and nano-remediation methods may detect and remove environmental contaminants. However, limited knowledge concerning nanomaterial biosafety, adverse effects, fate, and acquired biological reactivity once dispersed into the environment, requires further scientific efforts to assess possible nano-agricultural risks. In this perspective, toxicological research should be aimed to define nanomaterial hazards and levels of exposure along the life-cycle of nano-enabled products, and to assess those physico-chemical features affecting nanomaterial toxicity, possible interactions with agro-system co-formulants, and stressors. Overall, this review highlights the importance to define adequate risk management strategies for workers, occupational safety practices and policies, as well as to develop a responsible regulatory consensus on nanotechnology in agriculture.
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Affiliation(s)
- Ivo Iavicoli
- Department of Public Health, Division of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy.
| | - Veruscka Leso
- Department of Public Health, Division of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
| | - Donald H Beezhold
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Rd., Morgantown, WV, United States
| | - Anna A Shvedova
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Rd., Morgantown, WV, United States; Department of Physiology and Pharmacology, School of Medicine, West Virginia University, Robert C. Byrd Health Sciences Center, P.O. Box 9229, Morgantown, WV, United States
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48
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Bierhalz AC, Moraes ÂM. Composite membranes of alginate and chitosan reinforced with cotton or linen fibers incorporating epidermal growth factor. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:287-294. [DOI: 10.1016/j.msec.2017.03.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 12/13/2016] [Accepted: 03/02/2017] [Indexed: 01/16/2023]
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49
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Afrin S, Karim Z. Isolation and Surface Modification of Nanocellulose: Necessity of Enzymes over Chemicals. CHEMBIOENG REVIEWS 2017. [DOI: 10.1002/cben.201600001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Sadaf Afrin
- Aligarh Muslim University; Faculty of Science; Department of Chemistry; 202002 Aligarh India
| | - Zoheb Karim
- MoRe Research Örnsköldsvik AB; Box 70 891 22 Örnsköldsvik Sweden
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50
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Menas AL, Yanamala N, Farcas MT, Russo M, Friend S, Fournier PM, Star A, Iavicoli I, Shurin GV, Vogel UB, Fadeel B, Beezhold D, Kisin ER, Shvedova AA. Fibrillar vs crystalline nanocellulose pulmonary epithelial cell responses: Cytotoxicity or inflammation? CHEMOSPHERE 2017; 171:671-680. [PMID: 28061425 PMCID: PMC5459363 DOI: 10.1016/j.chemosphere.2016.12.105] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 12/12/2016] [Accepted: 12/20/2016] [Indexed: 05/20/2023]
Abstract
Nanocellulose (NC) is emerging as a highly promising nanomaterial for a wide range of applications. Moreover, many types of NC are produced, each exhibiting a slightly different shape, size, and chemistry. The main objective of this study was to compare cytotoxic effects of cellulose nanocrystals (CNC) and nanofibrillated cellulose (NCF). The human lung epithelial cells (A549) were exposed for 24 h and 72 h to five different NC particles to determine how variations in properties contribute to cellular outcomes, including cytotoxicity, oxidative stress, and cytokine secretion. Our results showed that NCF were more toxic compared to CNC particles with respect to cytotoxicity and oxidative stress responses. However, exposure to CNC caused an inflammatory response with significantly elevated inflammatory cytokines/chemokines compared to NCF. Interestingly, cellulose staining indicated that CNC particles, but not NCF, were taken up by the cells. Furthermore, clustering analysis of the inflammatory cytokines revealed a similarity of NCF to the carbon nanofibers response and CNC to the chitin, a known immune modulator and innate cell activator. Taken together, the present study has revealed distinct differences between fibrillar and crystalline nanocellulose and demonstrated that physicochemical properties of NC are critical in determining their toxicity.
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Affiliation(s)
- Autumn L Menas
- Exposure Assessment Branch/NIOSH/CDC, Morgantown, WV, USA
| | | | | | - Maria Russo
- Institute of Public Health, Section of Occupational Medicine, Catholic University of the Sacred Heart, Rome, Italy
| | - Sherri Friend
- Pathology & Physiology Research Branch/NIOSH/CDC, Morgantown, WV, USA
| | - Philip M Fournier
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Alexander Star
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ivo Iavicoli
- Department of Public Health, Division of Occupational Medicine, University of Naples Federico II, Naples, Italy
| | - Galina V Shurin
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Ulla B Vogel
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Bengt Fadeel
- Division of Molecular Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Donald Beezhold
- Health Effects Laboratory Division/NIOSH/CDC, Morgantown, WV, USA
| | - Elena R Kisin
- Exposure Assessment Branch/NIOSH/CDC, Morgantown, WV, USA
| | - Anna A Shvedova
- Exposure Assessment Branch/NIOSH/CDC, Morgantown, WV, USA; Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA.
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