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de M de Lima TA, de Lima GG, Rouxel P, Bezerra GSN, Fehrenbach GW, Magalhães WLE, Nugent MJD. Extraction and characterization of microfibrillated cellulose (MFC) from Rhododendron ponticum isolated using cryocrush pre-treatment and its potential for mycelium cultivation. Int J Biol Macromol 2024; 279:135284. [PMID: 39233156 DOI: 10.1016/j.ijbiomac.2024.135284] [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: 03/06/2024] [Revised: 08/28/2024] [Accepted: 09/01/2024] [Indexed: 09/06/2024]
Abstract
Rhododendron ponticum (R. ponticum), a rapidly spreading invasive species in Ireland, was investigated for its potential use in creating sustainable bioproducts. This study explored the utilization of R. ponticum biomass as a source of microfibrillated cellulose (MFC) for fungal cultivation. The production of MFC was evaluated employing a novel cryocrushing treatment combined with a twin-screw extruder (TSE). The results demonstrated a significant increase in film strength, up to 332.3 MPa, with increasing TSE steps compared to 72.5 MPa in untreated samples. X-ray diffraction (XRD) analysis revealed a decrease in crystallinity from 68.93 % to 59.2 %, following cryocrushing and TSE treatment. Additionally, MFC subjected to the highest TSE treatment (12 steps) was successfully used as a substrate for cultivating Agaricus blazei mushrooms using 0.2 wt%, 0.5 wt%, and 1 wt% MFC over a period of 7 days. Fourier-transform infrared spectroscopy (FTIR) confirmed the presence of chitin/chitin glucan within the fungal fibers. This research highlights the potential for transforming the invasive R. ponticum into valuable biocomposite materials. These MFC-fungus composites hold promise for various applications, including sustainable packaging, biodegradable plastics, and eco-friendly textiles.
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Affiliation(s)
- Tielidy A de M de Lima
- PRISM Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland.
| | - Gabriel Goetten de Lima
- PRISM Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland; Universidade Estadual Paulista, 47 Engeneering Faculty, 12516-410 Guaratingueta, Sao Paulo, Brazil
| | - Pierre Rouxel
- Department of Physical, Lanyon Institute of Technology, University of Rennes, 22300 Lanyon, France
| | | | - Gustavo W Fehrenbach
- PRISM Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland
| | | | - Michael J D Nugent
- PRISM Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland.
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Sharda D, Attri K, Choudhury D. Greener healing: sustainable nanotechnology for advanced wound care. DISCOVER NANO 2024; 19:127. [PMID: 39136798 PMCID: PMC11322481 DOI: 10.1186/s11671-024-04061-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 06/29/2024] [Indexed: 08/16/2024]
Abstract
Wound healing involves a carefully regulated sequence of events, encompassing pro-inflammatory and anti-inflammatory stages, tissue regeneration, and remodeling. However, in individuals with diabetes, this process gets disrupted due to dysregulation caused by elevated glucose levels and pro-inflammatory cytokines in the bloodstream. Consequently, the pro-inflammatory stage is prolonged, while the anti-inflammatory phase is delayed, leading to impaired tissue regeneration and remodeling with extended healing time. Furthermore, the increased glucose levels in open wounds create an environment conducive to microbial growth and tissue sepsis, which can escalate to the point of limb amputation. Managing diabetic wounds requires meticulous care and monitoring due to the lack of widely available preventative and therapeutic measures. Existing clinical interventions have limitations, such as slow recovery rates, high costs, and inefficient drug delivery methods. Therefore, exploring alternative avenues to develop effective wound-healing treatments is essential. Nature offers a vast array of resources in the form of secondary metabolites, notably polyphenols, known for their antimicrobial, anti-inflammatory, antioxidant, glucose-regulating, and cell growth-promoting properties. Additionally, nanoparticles synthesized through environmentally friendly methods hold promise for wound healing applications in diabetic and non-diabetic conditions. This review provides a comprehensive discussion and summary of the potential wound-healing abilities of specific natural polyphenols and their nanoparticles. It explores the mechanisms of action underlying their efficacy and presents effective formulations for promoting wound-healing activity.
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Affiliation(s)
- Deepinder Sharda
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India
| | - Komal Attri
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India
- Thapar Institute of Engineering and Technology-Virginia Tech (USA) Centre of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India
| | - Diptiman Choudhury
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India.
- Thapar Institute of Engineering and Technology-Virginia Tech (USA) Centre of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India.
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3
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Lin H, Hong G, Fei M, Shen Y, Zhang X, Li J, Yang W, Li R. Micro- and nano-hybrid cellulose fibers prepared by straightforward and high-efficiency hot water soaking-assisted colloid grinding for high-performance cellulose paper. Carbohydr Polym 2024; 327:121688. [PMID: 38171695 DOI: 10.1016/j.carbpol.2023.121688] [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: 08/01/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 01/05/2024]
Abstract
Micro- and nano-hybrid cellulose fiber (MNCF) stands out as a versatile cellulosic nanomaterial with promising applications in various fields owing to its excellent intrinsic nature and outstanding characteristics. However, the inefficiency in preparing MNCF, attributed to a complex multi-step processing, hinders its widespread adoption. In this study, a straightforward and highly efficient method for MNCF preparation was developed via a hot water soaking-assisted colloid grinding strategy. Active water molecules in hot water facilitating stronger transverse shrinkage and longitudinal expansion in fiber crystallized region, and thus improving the fibrillation degree of cellulose fibers. As a result, MNCFs with a mean diameter of 37.5 ± 22.2 nm and high concentration (2 wt%) were successfully achieved though pure mechanical method. The micro and nano-hybrid structure leads to the corresponding resulting cellulose paper with micro- and nano-hybrid structure possesses a compact stacking and fewer defects, leading to extraordinary mechanical properties including tensile strength of 204.5 MPa, Young's modulus of 6.3 GPa and elongation of 10.1 %. This work achieves significant progress towards straightforward and highly efficient production of MNCFs, offering an appreciable prospect for the development of multifunctional MNCF-based materials.
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Affiliation(s)
- Huiping Lin
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China
| | - Guolong Hong
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China
| | - Mingen Fei
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China
| | - Yiqin Shen
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China
| | - Xinxiang Zhang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China
| | - Jian Li
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China; Northeast Forestry University, Haerbin 150040, China
| | - Wenbin Yang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China.
| | - Ran Li
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350100, China.
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Morais RP, de Oliveira CC, Riegel-Vidotti IC, Marino CEB. pH stimulus-responsive hybrid nanoparticles: A system designed for follicular delivery of brazilian plant-derived 5-alpha-reductase enzyme inhibitors. Int J Pharm 2024; 650:123689. [PMID: 38072149 DOI: 10.1016/j.ijpharm.2023.123689] [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: 07/06/2023] [Revised: 11/10/2023] [Accepted: 12/06/2023] [Indexed: 01/08/2024]
Abstract
The 5-alpha-reductase enzyme, present in pilosebaceous units, plays a crucial role in the appearance of cutaneous hyperandrogenism manifestations (hirsutism, acne, and androgenetic alopecia). Its inhibition is an excellent strategy to reverse these conditions. Given the limitations of existing treatments, with transient effects and delayed therapeutic response, as well as the possibility of causing undesirable side effects, this study sought to develop new drug delivery systems to overcome these limitations. In other words, innovative stimuli-responsive hybrid nanoparticles were synthesized using silica/natural polysaccharides, encapsulating 5-alpha-reductase enzyme inhibitors derived from the plant Stryphnodendron adstringens (Mart.) Coville (commonly known as 'Barbatimão'). Silica core was synthesized by the modified Stöber method. The pH responsive polysaccharides used to coat the porous silica cores were chitosan, and sodium alginate, this coating was carried out using the Layer-by-Layer technique. The hybrid nanoparticles were characterized at molecular and physical-chemical levels. Furthermore, encapsulation efficiency, pH-dependent release behavior, and cytotoxicity were evaluated. Amorphous mesoporous structure with adequate size for follicular delivery (between 300 and 600 nm) in addition to effective phytocompound loading capacity, above 80 % was obtained. Based on the release studies, it was possible to observe pH responsiveness. The ethyl acetate fraction (EAF) obtained from "Barbatimão" bark extract was released in a controlled and more efficient manner by the alginate-coated nanoparticle (SNP_EAF_SA) at pH 7.4, which corresponds to the pH at the deepest area of hair follicles. Furthermore, SNP_EAF_SA proved to be less cytotoxic compared to EAF and chitosan-coated hybrid nanoparticles (SNP_EAF_CH). Characterization, release, and cytotoxicity results indicate that SNP_EAF_SA is a promising system for on-demand follicular delivery of antiandrogenic actives contained in EAF.
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Affiliation(s)
- Renata Pinho Morais
- Department of Mechanical Engineering, Universidade Federal do Paraná, Curitiba, Brazil.
| | | | | | - Cláudia E B Marino
- Department of Mechanical Engineering, Universidade Federal do Paraná, Curitiba, Brazil.
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de Lima TADM, de Lima GG, Munir N, Coutinho JRT, Mitchell GR, Magalhães WLE, Nugent MJD. Nanofibrillated cellulose originated from Rhododendron ponticum to produce scaffolds using 3D printing for biomedical applications. Int J Biol Macromol 2023; 253:126556. [PMID: 37640187 DOI: 10.1016/j.ijbiomac.2023.126556] [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: 04/25/2023] [Revised: 07/28/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
Rhododendron ponticum is an invasive species that spreads rapidly and is described as one of the biggest threats to peatlands in Ireland. This study offers an innovative approach to utilizing Rhododendron waste. Initially, sawdust was submitted to a bleaching treatment and the nanofibrillated cellulose (NFC) was obtained using two different methods: ultra-fine friction grinding and twin-screw extrusion with the assistance of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) pre-treatment. The samples processed through twin-screw extrusion exhibited the presence of NFC at five intervals, as confirmed by TEM analysis. However, these samples displayed a higher diameter deviation compared to those processed through grinding alone. Notably, after 20 extrusion steps, the NFC diameter became more uniform, reaching approximately 35 nm. Sedimentation tests showed that extrusion produced more homogeneous cellulose size than the grinder method. However, FTIR characterization for the samples showed a unique band related to C-O-C glycosidic linkage. The results showed that grinding breaks these groups resulting in crystallinity values lower than extrusion, 50 % compared 60 %. Therefore, NFC with 20 steps by grinding was blended with polycaprolactone to produce a 3D scaffold using a 3D printer at different ratios of 1-5 % addition. The effect of 1 % of NFC was unique showing significant enhanced mechanical properties compared to pure polycaprolactone (PCL), additionally, the NFC does not exhibit toxicity so these materials show promise for biomedical applications.
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Affiliation(s)
- Tielidy A de M de Lima
- Materials Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland.
| | - Gabriel Goetten de Lima
- Materials Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland; Programa de Pós-Graduação em Engenharia e Ciência dos Materiais-PIPE, Universidade Federal do Paraná, Curitiba 81531-980, Brazil
| | - Nimra Munir
- Centre for Precision Engineering, Materials and Manufacturing (PEM Centre),Atlantic Technological University, ATU Sligo, Ash Lane, F91 YW50 Sligo, Ireland
| | - Joana Raquel Teixeira Coutinho
- Centre for Rapid and Sustainable Product Development, Institute Polytechnic of Leiria, 2430-082 Marinha Grande, Portugal
| | - Geoffrey Robert Mitchell
- Centre for Rapid and Sustainable Product Development, Institute Polytechnic of Leiria, 2430-082 Marinha Grande, Portugal
| | | | - Michael J D Nugent
- Materials Research Institute, Technological University of the Shannon: Midlands Midwest, N37HD68 Athlone, Ireland.
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Liu X, Sun H, Leng X. Coffee Silverskin Cellulose-Based Composite Film with Natural Pigments for Food Packaging: Physicochemical and Sensory Abilities. Foods 2023; 12:2839. [PMID: 37569108 PMCID: PMC10417091 DOI: 10.3390/foods12152839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/16/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023] Open
Abstract
To promote a circular economy, the use of agricultural by-products as food packaging material has steadily increased. However, designing food packaging films that meet consumers' preferences and requirements is still a challenge. In this work, cellulose extracted from coffee silverskin (a by-product of coffee roasting) and chitosan were combined with different natural pigments (curcumin, phycocyanin, and lycopene) to generate a variety of composite films with different colors for food packaging. The physicochemical and sensory properties of the films were evaluated. The cellulose/chitosan film showed favorable mechanical properties and water sensitivity. Addition of natural pigments resulted in different film colors, and significantly affected the optical properties and improved the UV-barrier, swelling degree, and water vapor permeability (WVP), but there were also slight decreases in the mechanical properties. The various colored films can influence the perceived features and evoke different emotions from consumers, resulting in films receiving different attraction and liking scores. This work provides a comprehensive evaluation strategy for coffee silverskin cellulose-based composite films with incorporated pigments, and a new perspective on the consideration of the hedonic ratings of consumers regarding bio-based films when designing food packaging.
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Affiliation(s)
- Xinnan Liu
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (H.S.)
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Hongbo Sun
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (H.S.)
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Xiaojing Leng
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (X.L.); (H.S.)
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, China Agricultural University, Beijing 100083, China
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7
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Xie X, Chen X, Wang Y, Zhang M, Fan Y, Yang X. High-loading Cu single-atom nanozymes supported by carbon nitride with peroxidase-like activity for the colorimetric detection of tannic acid. Talanta 2023; 257:124387. [PMID: 36841014 DOI: 10.1016/j.talanta.2023.124387] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 02/07/2023] [Accepted: 02/18/2023] [Indexed: 02/23/2023]
Abstract
The design of nanozymes with high metal atom loading is of great significance to improve enzyme activity and is also the key to furthering the construction of highly sensitive colorimetric sensors. In this work, a colorimetric sensor for the quantitative analysis of tannic acid (TA) was developed based on two-dimensional carbon nanosheet carbon nitride (CN)-supported Cu single-atom nanozymes (Cu/CN). Cu/CN was synthesized by supramolecular preorganization and calcination, with an ultrathin nanosheet structure and a high density of Cu active sites, with a Cu loading of up to 14.3 wt%. Benefiting from the above characteristics, Cu/CN exhibits peroxidase-mimicking activity and excellent catalytic performance. Therefore, a colorimetric sensor was constructed for the fast and sensitive quantitative analysis of TA with good linearity in the range of 0.09-3.2 μM and a low detection limit of 30 nM. Furthermore, the sensor was successfully applied to the analysis of TA in tea samples of different varieties. This work sheds new light on the design of nanozymes with a high density of active sites and the analysis of TA in real environments.
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Affiliation(s)
- Xiaoyi Xie
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China
| | - Xiaofang Chen
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China
| | - Yaohui Wang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China
| | - Maosen Zhang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China
| | - Yuxiu Fan
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China
| | - Xiupei Yang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, 637000, China.
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de Andrade Arruda Fernandes I, Ribeiro IS, Maciel GM, Pedro AC, Bortolini DG, Ribeiro VR, Barros L, Haminiuk CWI. Biosorption of bioactive compounds in bacterial nanocellulose: Mechanisms and physical-chemical properties. Int J Biol Macromol 2023; 240:124349. [PMID: 37054855 DOI: 10.1016/j.ijbiomac.2023.124349] [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: 12/06/2022] [Revised: 03/14/2023] [Accepted: 04/03/2023] [Indexed: 04/15/2023]
Abstract
Bacterial cellulose (BC) is a biomaterial produced by Gluconacetobacter xylinus, with wide applicability in different areas, such as biomedical, pharmaceutical, and food. BC production is usually carried out in a medium containing phenolic compounds (PC), such as teas, however, the purification process leads to the loss of such bioactive. Thus, the innovation of this research consists of the reincorporation of PC after the purification of the BC matrices through the biosorption process. In this context, the effects of the biosorption process in BC were evaluated to maximize the incorporation of phenolic compounds from a ternary mixture of hibiscus (Hibiscus sabdariffa), white tea (Camellia sinensis), and grape pomace (Vitis labrusca). The biosorbed membrane (BC-Bio) showed a great concentration of total phenolic compounds (TPC = 64.89 mg L-1) and high antioxidant capacity through different assays (FRAP: 130.7 mg L-1, DPPH: 83.4 mg L-1, ABTS: 158.6 mg L-1, TBARS: 234.2 mg L-1). The physical tests also indicated that the biosorbed membrane presented high water absorption capacity, thermal stability, low permeability to water vapor and improved mechanical properties compared to BC-control. These results index that the biosorption of phenolic compounds in BC efficiently increases bioactive content and improves physical membrane characteristics. Also, PC release in a buffered solution suggests that BC-Bio can be used as a polyphenol delivery system. Therefore, BC-Bio is a polymer with wide application in different industrial segments.
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Affiliation(s)
| | - Isabela Sampaio Ribeiro
- Programa de Pós-Graduação em Engenharia de Alimentos (PPGEAL), Universidade Federal do Paraná (UFPR), 81531-980 Curitiba, Paraná, Brazil
| | - Giselle Maria Maciel
- Laboratório de Biotecnologia, Universidade Tecnológica Federal do Paraná (UTFPR), 81280-340 Curitiba, Paraná, Brazil
| | - Alessandra Cristina Pedro
- Programa de Pós-Graduação em Engenharia de Alimentos (PPGEAL), Universidade Federal do Paraná (UFPR), 81531-980 Curitiba, Paraná, Brazil
| | - Débora Gonçalves Bortolini
- Programa de Pós-Graduação em Engenharia de Alimentos (PPGEAL), Universidade Federal do Paraná (UFPR), 81531-980 Curitiba, Paraná, Brazil
| | - Valéria Rampazzo Ribeiro
- Programa de Pós-Graduação em Engenharia de Alimentos (PPGEAL), Universidade Federal do Paraná (UFPR), 81531-980 Curitiba, Paraná, Brazil
| | - Lillian Barros
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Bragança, Portugal; Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Bragança, Portugal.
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Masood S, Gulnar L, Chandio AD, Arshad H, Rehman W, Atique A. Preparation and optical characterization of poly (vinyl alcohol) and starch (native and modified) blend films. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03332-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Cheng C, Peng X, Xi L, Wan C, Shi S, Wang Y, Yu X. An agar-polyvinyl alcohol hydrogel loaded with tannic acid with efficient hemostatic and antibacterial capacity for wound dressing. Food Funct 2022; 13:9622-9634. [PMID: 36004684 DOI: 10.1039/d2fo02251f] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rapid hemostasis, antibacterial effect and promotion of wound healing are the most important functions that wound dressings need to have. In this work, we designed and prepared a hydrogel with antibacterial effect, hemostatic ability and wound healing promotion using agar, polyvinyl alcohol (PVA) and tannic acid (TA). We performed a series of tests to characterize the structure and properties of AGAR@PVA-TA hydrogels. The results showed that the AGAR@PVA-TA hydrogels had good mechanical properties and excellent antibacterial ability as well as good hemocompatibility. The cytotoxicity results showed that the AGAR@PVA-TA hydrogels had good cytocompatibility. And the TA loaded hydrogels also presented some good performances in animal studies. In the liver hemostasis model, the AGAR@PVA-TA hydrogel showed good hemostatic ability. Also, the AGAR@PVA-TA hydrogel was able to promote wound healing in an S. aureus-infected rat wound model. More importantly, our research results demonstrated that compared to other polyphenols (such as proanthocyanidins), TA could better improve the mechanical properties, antibacterial ability and rapid hemostasis of hydrogels, which illustrated the uniqueness of TA. Therefore, the TA loaded hydrogel (AGAR@PVA-TA hydrogel) has the potential to be applied as a wound dressing.
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Affiliation(s)
- Can Cheng
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
| | - Xu Peng
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China. .,Experimental and Research Animal Institute, Sichuan University, Chengdu 610065, P. R. China
| | - Linjie Xi
- Western Theater Command Air Force Hospital, Department of Oncology Hematology, No. 137 Jiuyanqiao Shunjiang Road, Chengdu, Sichuan Province, 610021, P. R. China
| | - Chang Wan
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
| | - Shubin Shi
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
| | - Yuhang Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
| | - Xixun Yu
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
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Characterization of Gels and Films Produced from Pinhão Seed Coat Nanocellulose as a Potential Use for Wound Healing Dressings and Screening of Its Compounds towards Antitumour Effects. Polymers (Basel) 2022; 14:polym14142776. [PMID: 35890552 PMCID: PMC9315714 DOI: 10.3390/polym14142776] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
The reuse of agro-industrial waste assumes great importance today. Pinhão is the seed of Araucaria angustifolia, which is native to the mountains of southern Brazil, Paraguay, and Argentina. The coat is a by-product of this seed and is rich in phenolic compounds. The present study aimed to use the residue as a precursor material for the production of nanocellulose through the mechanical defibrillation process and perform the characterization of the films and the gel to investigate the effect on the physical and regenerative properties when incorporated with polyvinyl alcohol (PVA). The modulus of elasticity was higher when the MFC of pinhão was added to the PVA. Film and gel had their cytotoxicity tested by MTT assay using 3T3 fibroblast and Schwann cancer cells, and a migration assay was also performed using the scratch test on HaCat keratinocyte cells. For the scratch test, film and gel samples with low concentration presented a complete scratch closure in 72 h. Molecular docking was performed and quercetin had the ideal interaction score values, so it was used with the PACAP protein which presented a slightly moderate interaction with the protein synthesis of Schwann cells, presenting compactness of the compound after 14 ns.
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12
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Lamei E, Hasanzadeh M. Fabrication of chitosan nanofibrous scaffolds based on tannic acid and metal-organic frameworks for hemostatic wound dressing applications. Int J Biol Macromol 2022; 208:409-420. [PMID: 35339500 DOI: 10.1016/j.ijbiomac.2022.03.117] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 03/10/2022] [Accepted: 03/17/2022] [Indexed: 12/14/2022]
Abstract
Here, we developed chitosan (CS)-based nanofibrous scaffold consisting of tannic acid (TA) and zinc-based metal-organic framework (MOF) as a novel antibacterial and hemostatic wound dressing. The effect of MOF content and its incorporation within and onto CS/PVA-TA nanofibrous scaffolds were studied. The morphological characterization of fabricated nanofibrous scaffolds revealed the formation of uniform and bead-free nanofibers with an average diameter between 120 and 150 nm. The uniform and continuous decoration of MOF crystals on nanofibrous scaffold surfaces were confirmed by FESEM. The developed nanofibrous scaffolds exhibit appropriate physicochemical characteristics such as chemical and crystalline structure, surface wettability and swelling, and mechanical properties. It is shown that the incorporation of TA and MOFs greatly enhanced the hemostatic performance of the CS/PVA nanofibrous scaffold by providing rapid liquid absorbability and accelerating the aggregation of coagulation factors and platelets. Furthermore, the results of the MTT assay suggested the good biocompatibility of nanofibrous scaffolds containing MOF nanoparticles. The nanofibrous scaffolds exhibited excellent antibacterial activity against Escherichia coli and Staphylococcus aureus. The disk diffusion antibacterial assay showed that the nanofibrous scaffolds containing TA and MOF could protect wound from bacterial infection. The findings provide new insights to develop a MOF-modified nanofibrous structure with great potential for hemostatic wound dressing application.
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Affiliation(s)
- Elnaz Lamei
- Department of Textile Engineering, Yazd University, P.O. Box 89195-741, Yazd, Iran
| | - Mahdi Hasanzadeh
- Department of Textile Engineering, Yazd University, P.O. Box 89195-741, Yazd, Iran.
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