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Li Y, Jiao H, Zhang H, Wang X, Fu Y, Wang Q, Liu H, Yong YC, Guo J, Liu J. Biosafety consideration of nanocellulose in biomedical applications: A review. Int J Biol Macromol 2024; 265:130900. [PMID: 38499126 DOI: 10.1016/j.ijbiomac.2024.130900] [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: 01/10/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/20/2024]
Abstract
Nanocellulose-based biomaterials have gained significant attention in various fields, especially in medical and pharmaceutical areas, due to their unique properties, including non-toxicity, high specific surface area, biodegradability, biocompatibility, and abundant feasible and sophisticated strategies for functional modification. The biosafety of nanocellulose itself is a prerequisite to ensure the safe and effective application of biomaterials as they interact with living cells, tissues, and organs at the nanoscale. Potential residual endogenous impurities and exogenous contaminants could lead to the failure of the intended functionalities or even serious health complications if they are not adequately removed and assessed before use. This review summarizes the sources of impurities in nanocellulose that may pose potential hazards to their biosafety, including endogenous impurities that co-exist in the cellulosic raw materials themselves and exogenous contaminants caused by external exposure. Strategies to reduce or completely remove these impurities are outlined and classified as chemical, physical, biological, and combined methods. Additionally, key points that require careful consideration in the interpretation of the biosafety evaluation outcomes were discussed to ensure the safety and effectiveness of the nanocellulose-based biomaterials in medical applications.
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Affiliation(s)
- Yan Li
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Haixin Jiao
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Hongxing Zhang
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Xiangyu Wang
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Yinyi Fu
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Qianqian Wang
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Huan Liu
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China
| | - Yang-Chun Yong
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Jiaqi Guo
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
| | - Jun Liu
- Biofuels Institute, School of Environment and Safety Engineering, c/o School of Emergency Management, Jiangsu University, Zhenjiang 212013, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
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Horie M, Fujita K, Endoh S, Sugino S, Maru J, Moriyama A, Ogura I. Contaminant microorganisms in the in vitro evaluation of cellular responses of cellulose nanofibers and their microbial inactivation using gamma irradiation. Toxicol Mech Methods 2023; 33:741-754. [PMID: 37496379 DOI: 10.1080/15376516.2023.2238061] [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: 03/17/2023] [Revised: 06/09/2023] [Accepted: 06/09/2023] [Indexed: 07/28/2023]
Abstract
Cellulose nanofibers (CNFs) are fibrous nanomaterials produced from plants. Since some nanomaterials are toxic, toxicity evaluation, including in vitro examinations using cultured cells, is essential for the effective use of CNFs. On the other hand, microorganisms in the environment can contaminate CNF suspensions. The contamination of CNF samples and the effects of contaminating microorganisms on in vitro examinations were investigated in this study. Microorganism contamination in CNF samples was examined, and microbial inactivation of CNF suspensions using gamma irradiation was evaluated. After gamma-ray irradiation at absorbed doses of 0.5, 1, 5, and 10 kGy, the cellular effects of CNF suspensions were examined using 6 types of cultured cell, HaCaT, A549, Caco-2, MeT-5A, THP-1, and NR8383 cells. CNF samples were contaminated with bacteria and CNF suspensions exhibited endotoxin activity. Gamma irradiation effectively inactivated the microorganisms contained in the CNF suspensions. When the absorbed dose was 10 kGy, the fiber length of CNF was shortened, but the effect on CNF was small at 1.0 kGy or less. CNF suspensions showed lipopolysaccharides (LPS)-like cellular responses and strongly induced interleukin-8, especially in macrophages. Absorbed doses of at least 10 kGy did not affect the LPS-like activity. In this study, it was shown that the CNF suspension may be contaminated with microorganisms. Gamma irradiation was effective for microbial inactivation of suspension for invitor toxicity evaluation of CNF. In vitro evaluation of CNFs requires attention to the effects of contaminants such as LPS.
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Affiliation(s)
- Masanori Horie
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Katsuhide Fujita
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Shigehisa Endoh
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Sakiko Sugino
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa, Japan
| | - Junko Maru
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Akihiro Moriyama
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Isamu Ogura
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
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Zhao J, Hou L, Zhao L, Liu L, Qi J, Wang L. An environment-friendly approach using deep eutectic solvent combined with liquid-liquid microextraction based on solidification of floating organic droplets for simultaneous determination of preservatives in beverages. RSC Adv 2023; 13:7185-7192. [PMID: 36875877 PMCID: PMC9982713 DOI: 10.1039/d2ra07145b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/22/2023] [Indexed: 03/06/2023] Open
Abstract
With the increase in environmental protection awareness, the development of strategies to reduce the use of organic solvent used during the extraction process has attracted wide attention. A simple and green ultrasound-assisted deep eutectic solvent extraction combined with liquid-liquid microextraction based on solidification of floating organic droplets method was developed and validated for the simultaneous determination of five preservatives (methyl paraben, ethyl paraben, propyl paraben, isopropyl paraben, isobutyl paraben) in beverages. Extraction conditions including the volume of DES, value of pH, and concentration of salt were statistically optimized through response surface methodology using a Box-Behnken design. Complex Green Analytical Procedure Index (ComplexGAPI) was successfully used to estimate the greenness of the developed method and compare with the previous methods. As a result, the established method was linear, precise, and accurate over the range of 0.5-20 μg mL-1. Limits of detection and limits of quantification were in the range of 0.15-0.20 μg mL-1 and 0.40-0.45 μg mL-1, respectively. The recoveries of all five preservatives ranged from 85.96% to 110.25%, with relative standard deviation less than 6.88% (intra-day) and 4.93% (inter-day). The greenness of the present method is significantly better compared with the previous reported methods. Additionally, the proposed method was successfully applied to analysis of preservatives in beverages and is a potentially promising technique for drink matrices.
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Affiliation(s)
- Jing Zhao
- School of Pharmacy, Zhejiang University 866 Yuhangtang Road 310058 Hangzhou Zhejiang Province P.R. China .,Zhejiang Weikang Pharmaceutical Company 15 Xinggong North Road 324100 Jiangshan Zhejiang Province P.R. China.,School of Pharmacy, Shenyang Pharmaceutical University 103 Wenhua Road 110016 Shenyang Liaoning Province P.R. China
| | - Lingjun Hou
- School of Pharmacy, Shenyang Pharmaceutical University 103 Wenhua Road 110016 Shenyang Liaoning Province P.R. China
| | - Longshan Zhao
- School of Pharmacy, Shenyang Pharmaceutical University 103 Wenhua Road 110016 Shenyang Liaoning Province P.R. China
| | - Liqing Liu
- Zhejiang Weikang Pharmaceutical Company 15 Xinggong North Road 324100 Jiangshan Zhejiang Province P.R. China
| | - Jianhua Qi
- School of Pharmacy, Zhejiang University 866 Yuhangtang Road 310058 Hangzhou Zhejiang Province P.R. China
| | - Longhu Wang
- School of Pharmacy, Zhejiang University 866 Yuhangtang Road 310058 Hangzhou Zhejiang Province P.R. China
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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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Aimonen K, Hartikainen M, Imani M, Suhonen S, Vales G, Moreno C, Saarelainen H, Siivola K, Vanhala E, Wolff H, Rojas OJ, Norppa H, Catalán J. Effect of Surface Modification on the Pulmonary and Systemic Toxicity of Cellulose Nanofibrils. Biomacromolecules 2022; 23:2752-2766. [PMID: 35680128 DOI: 10.1021/acs.biomac.2c00072] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cellulose nanofibrils (CNFs) have emerged as sustainable options for a wide range of applications. However, the high aspect ratio and biopersistence of CNFs raise concerns about potential health effects. Here, we evaluated the in vivo pulmonary and systemic toxicity of unmodified (U-CNF), carboxymethylated (C-CNF), and TEMPO (2,2,6,6-tetramethyl-piperidin-1-oxyl)-oxidized (T-CNF) CNFs, fibrillated in the same way and administered to mice by repeated (3×) pharyngeal aspiration (14, 28, and 56 μg/mouse/aspiration). Toxic effects were assessed up to 90 days after the last administration. Some mice were treated with T-CNF samples spiked with lipopolysaccharide (LPS; 0.02-50 ng/mouse/aspiration) to assess the role of endotoxin contamination. The CNFs induced an acute inflammatory reaction that subsided within 90 days, except for T-CNF. At 90 days post-administration, an increased DNA damage was observed in bronchoalveolar lavage and hepatic cells after exposure to T-CNF and C-CNF, respectively. Besides, LPS contamination dose-dependently increased the hepatic genotoxic effects of T-CNF.
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Affiliation(s)
- Kukka Aimonen
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Mira Hartikainen
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Monireh Imani
- Department of Bioproducts and Biosystems, Aalto University, 02150 Espoo, Finland
| | - Satu Suhonen
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Gerard Vales
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Carlos Moreno
- Department of Anatomy, Embryology and Genetics, University of Zaragoza, 50013 Zaragoza, Spain
| | - Hanna Saarelainen
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Kirsi Siivola
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Esa Vanhala
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Henrik Wolff
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Orlando J Rojas
- Department of Bioproducts and Biosystems, Aalto University, 02150 Espoo, Finland.,Bioproducts Institute, Department of Chemical and Biological Engineering, Department of Chemistry and Department of Wood Science, The University of British Columbia, Vancouver BC V6T 1Z3, Canada
| | - Hannu Norppa
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland
| | - Julia Catalán
- Finnish Institute of Occupational Health, P.O. Box 40, 00032 Helsinki, Finland.,Department of Anatomy, Embryology and Genetics, University of Zaragoza, 50013 Zaragoza, Spain
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Fujita K, Obara S, Maru J, Endoh S. Genotoxicity assessment of cellulose nanofibrils using a standard battery of in vitro and in vivo assays. Toxicol Rep 2022; 9:68-77. [PMID: 35004184 PMCID: PMC8718569 DOI: 10.1016/j.toxrep.2021.12.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 11/10/2021] [Accepted: 12/15/2021] [Indexed: 11/26/2022] Open
Abstract
CNFs did not induce bacterial reverse and in vitro mammalian cell gene mutation. CNFs did not induce chromosomal aberration in CHL/IU cells. CNFs did not increase the proportion of micronucleated polychromatic erythrocytes in rat bone marrow. Three types of CNFs with different manufacturing methods exhibited no genotoxicity.
Cellulose nanofibrils (CNFs) are identified as novel nanomaterials with many potential applications. Since CNFs are fibrous manufactured nanomaterials, their potential carcinogenic effects and mesothelial toxicity raise some concerns. In this study, we conducted a standard battery of in vitro and in vivo assays to evaluate the genotoxicity of two CNF types using different manufacturing methods and physicochemical properties. Namely, one was CNF produced via chemical modification by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation, while the other was CNF produced via mechanical defibrillation using needle bleached kraft pulp. A bacterial reverse mutation test and a mouse lymphoma TK assay revealed that CNFs at 100 μg/mL did not induce bacterial reverse mutations and in vitro mammalian cell gene mutation. Further, in vitro chromosomal aberration tests demonstrated that CNFs at 100 μg/mL did not induce chromosomal aberration in Chinese hamster lung fibroblasts. From the mammalian erythrocyte micronucleus test, no statistically significant increase was observed in the proportion of micronucleated polychromatic erythrocytes in the bone marrow cells of rats intratracheally instilled with any concentration of CNFs (0.25–1.0 mg/kg) compared with values from respective negative control groups. Therefore, this battery of in vitro and in vivo assays illustrated that the CNFs examined in this study did not induce genotoxicity, suggesting our results provide valuable insight on the future use of these materials in various industrial applications.
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Affiliation(s)
- Katsuhide Fujita
- Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8569, Japan
| | - Sawae Obara
- Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8569, Japan
| | - Junko Maru
- Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8569, Japan
| | - Shigehisa Endoh
- Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8569, Japan
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