151
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Biocompatible chitin/carbon nanotubes composite hydrogels as neuronal growth substrates. Carbohydr Polym 2017; 174:830-840. [PMID: 28821138 DOI: 10.1016/j.carbpol.2017.06.101] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/28/2017] [Accepted: 06/26/2017] [Indexed: 12/20/2022]
Abstract
In the past decades, extensive studies have demonstrated that carbon nanotubes (CNTs) could promote cell adhesion, proliferation and differentiation of neuronal cells. However, the potential cytotoxicity in biological systems severely restricted the utilization of CNTs as substrates for neural growth. In this study, biocompatible chitin/carbon nanotubes (Ch/CNT) composite hydrogels were developed via blending modified CNTs with chitin solution in 11wt% NaOH/4wt% urea aqueous system, and subsequently regenerating in ethanol. As the CNTs were dispersed homogeneously in chitin matrix and combined with chitin nanofibers to form a compact and neat Ch/CNT nanofibrous network through intermolecular interactions, such as electrostatic interactions, hydrogen bonding and amphiphilic interaction, etc. The tensile strength and elongation at break of the Ch/CNT composite hydrogels were obviously enhanced, and the swelling ratio decreased. In addition, the Ch/CNT hydrogels exhibited good hemocompatibility, biodegradation in vitro and biocompatibility without cytotoxicity and neurotoxicity nature to neuronal and Schwann cells (PC12 cells and RSC96 cells). Especially, the Ch/CNT3 composite hydrogels exhibited significant enhancement of the neuronal cell adhesion, proliferation and neurite outgrowth of neuronal cells with a great increase in both the percentage and the length of neurites. Therefore, we provide a simple and efficient approach to construct the novel Ch/CNT hydrogels as neuronal growth substrates for the potential application in nerve regeneration.
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152
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Wang M, Xue H, Feng Z, Cheng B, Yang H. Increase of tensile strength and toughness of bio-based diglycidyl ether of bisphenol A with chitin nanowhiskers. PLoS One 2017; 12:e0177673. [PMID: 28604774 PMCID: PMC5467804 DOI: 10.1371/journal.pone.0177673] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 05/01/2017] [Indexed: 11/22/2022] Open
Abstract
It is challenging to reinforce and toughen thermoset epoxy resins. We describe a slurry-compounding technique to transfer a uniform dispersion of chitin nanowhiskers (CW) in ethanol into an epoxy matrix. The incorporation of the hydrophilic CW reinforces the oil-soluble diglycidyl ether of bisphenol A (DGEBA). The resultant CW/epoxy bionanocomposites were transparent and showed considerably enhanced thermal and mechanical properties with tensile strength, modulus, toughness, and elongation at break being increased by 49%, 16%, 457%, and 250%, with only 2.5 wt.% CW. This improvement in strength and toughness is rare for thermoset epoxy/rigid nanofiller systems. We hypothesize that CW with many free amine groups could function not only as a nanofiller but also as a macromolecular polyamine hardener that participates in epoxy curing. The strong covalent interaction between the filler and the matrix allowed for efficient load transfer across the interfaces, which accounted for the greater strength and toughness.
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Affiliation(s)
- Mian Wang
- School of Life Science and Technology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Han Xue
- School of Life Science and Technology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Zhiwei Feng
- School of Life Science and Technology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Binfeng Cheng
- School of Life Science and Technology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
- * E-mail: (HY); (BC)
| | - Haijie Yang
- School of Life Science and Technology, Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
- * E-mail: (HY); (BC)
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153
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Amore V, Hernández MI, Carrascal LM, Lobo JM. Exoskeleton may influence the internal body temperatures of Neotropical dung beetles (Col. Scarabaeinae). PeerJ 2017; 5:e3349. [PMID: 28533987 PMCID: PMC5438579 DOI: 10.7717/peerj.3349] [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] [Received: 12/14/2016] [Accepted: 04/24/2017] [Indexed: 11/22/2022] Open
Abstract
The insect exoskeleton is a multifunctional coat with a continuum of mechanical and structural properties constituting the barrier between electromagnetic waves and the internal body parts. This paper examines the ability of beetle exoskeleton to regulate internal body temperature considering its thermal permeability or isolation to simulated solar irradiance and infrared radiation. Seven Neotropical species of dung beetles (Coleoptera, Scarabaeinae) differing in colour, surface sculptures, size, sexual dimorphism, period of activity, guild category and altitudinal distribution were studied. Specimens were repeatedly subjected to heating trials under simulated solar irradiance and infrared radiation using a halogen neodymium bulb light with a balanced daylight spectrum and a ceramic infrared heat emitter. The volume of exoskeleton and its weight per volume unit were significantly more important for the heating rate at the beginning of the heating process than for the asymptotic maximum temperature reached at the end of the trials: larger beetles with relatively thicker exoskeletons heated more slowly. The source of radiation greatly influences the asymptotic temperature reached, but has a negligible effect in determining the rate of heat gain by beetles: they reached higher temperatures under artificial sunlight than under infrared radiation. Interspecific differences were negligible in the heating rate but had a large magnitude effect on the asymptotic temperature, only detectable under simulated sun irradiance. The fact that sun irradiance is differentially absorbed dorsally and transformed into heat among species opens the possibility that differences in dorsal exoskeleton would facilitate the heat gain under restrictive environmental temperatures below the preferred ones. The findings provided by this study support the important role played by the exoskeleton in the heating process of beetles, a cuticle able to act passively in the thermal control of body temperature without implying energetic costs and metabolic changes.
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Affiliation(s)
- Valentina Amore
- Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Malva I.M. Hernández
- Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Luis M. Carrascal
- Department of Biogeography and Global Change, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | - Jorge M. Lobo
- Department of Biogeography and Global Change, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
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154
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Biological, mechanical, optical and physicochemical properties of natural chitin films obtained from the dorsal pronotum and the wing of cockroach. Carbohydr Polym 2017; 163:162-169. [DOI: 10.1016/j.carbpol.2017.01.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/29/2016] [Accepted: 01/05/2017] [Indexed: 01/24/2023]
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155
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Hiratani T, Hamad WY, MacLachlan MJ. Transparent Depolarizing Organic and Inorganic Films for Optics and Sensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1606083. [PMID: 28128872 DOI: 10.1002/adma.201606083] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 12/09/2016] [Indexed: 06/06/2023]
Abstract
Fabrication of novel organic and inorganic depolarizing films derived from quasinematic cellulose nanocrystal (CNC) organization is demonstrated. These films convert linearly polarized and circularly polarized light into unpolarized light over the entire visible region. Patterning of the quasinematic CNCs on top of a chiral nematic film gives latent images that are revealed only upon observation through the circularly polarizing filters.
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Affiliation(s)
- Takayuki Hiratani
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Wadood Y Hamad
- FPInnovations, 2665 East Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Mark J MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
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156
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Implications of molecular diversity of chitin and its derivatives. Appl Microbiol Biotechnol 2017; 101:3513-3536. [DOI: 10.1007/s00253-017-8229-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/26/2017] [Accepted: 03/04/2017] [Indexed: 02/03/2023]
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157
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Koizumi R, Azuma K, Izawa H, Morimoto M, Ochi K, Tsuka T, Imagawa T, Osaki T, Ito N, Okamoto Y, Saimoto H, Ifuku S. Oral Administration of Surface-Deacetylated Chitin Nanofibers and Chitosan Inhibit 5-Fluorouracil-Induced Intestinal Mucositis in Mice. Int J Mol Sci 2017; 18:ijms18020279. [PMID: 28134832 PMCID: PMC5343815 DOI: 10.3390/ijms18020279] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Accepted: 01/24/2017] [Indexed: 01/27/2023] Open
Abstract
This study investigated the prophylactic effects of orally administered surface-deacetylated chitin nanofibers (SDACNFs) and chitosan against 5-fluorouracil (5-FU)-induced intestinal mucositis, which is a common side effect of 5-FU chemotherapy. SDACNFs and chitosan abolished histological abnormalities associated with intestinal mucositis and suppressed hypoproliferation and apoptosis of intestinal crypt cells. These results indicate that SDACNF and chitosan are useful agents for preventing mucositis induced by anti-cancer drugs.
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Affiliation(s)
- Ryo Koizumi
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Hironori Izawa
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Minoru Morimoto
- Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University, Tottori 680-8550, Japan.
| | - Kosuke Ochi
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Tomohiro Osaki
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan.
| | - Hiroyuki Saimoto
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
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158
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Ma X, Zhang L, Tan J, Qin Y, Chen H, He W, Yang W, Li H. Continuous manufacturing of nanofiber yarn with the assistance of suction wind and rotating collection via needleless melt electrospinning. J Appl Polym Sci 2017. [DOI: 10.1002/app.44820] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Xiaolu Ma
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Liyan Zhang
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Jing Tan
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Yongxin Qin
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Hongbo Chen
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Wanlin He
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Weimin Yang
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
| | - Haoyi Li
- College of Mechanical and Electrical Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
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159
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Wu S, Duan B, Zeng X, Lu A, Xu X, Wang Y, Ye Q, Zhang L. Construction of blood compatible lysine-immobilized chitin/carbon nanotube microspheres and potential applications for blood purified therapy. J Mater Chem B 2017; 5:2952-2963. [DOI: 10.1039/c7tb00101k] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel lysine-immobilized chitin/carbon nanotube microspheres are prepared with excellent bilirubin adsorption properties and good blood compatibility for blood purified therapy.
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Affiliation(s)
- Shuangquan Wu
- College of Chemistry & Molecule Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
- Zhongnan Hospital of Wuhan University
| | - Bo Duan
- College of Chemistry & Molecule Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Xianpeng Zeng
- Zhongnan Hospital of Wuhan University
- Institute of Hepatobiliary Diseases of Wuhan University
- Transplant Center of Wuhan University
- Hubei Key Laboratory of Medical Technology on Transplantation
- Wuhan 430071
| | - Ang Lu
- College of Chemistry & Molecule Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Xiaojuan Xu
- College of Chemistry & Molecule Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Yanfeng Wang
- Zhongnan Hospital of Wuhan University
- Institute of Hepatobiliary Diseases of Wuhan University
- Transplant Center of Wuhan University
- Hubei Key Laboratory of Medical Technology on Transplantation
- Wuhan 430071
| | - Qifa Ye
- Zhongnan Hospital of Wuhan University
- Institute of Hepatobiliary Diseases of Wuhan University
- Transplant Center of Wuhan University
- Hubei Key Laboratory of Medical Technology on Transplantation
- Wuhan 430071
| | - Lina Zhang
- College of Chemistry & Molecule Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
- School of Chemistry and Chemical Engineering
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160
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Palanisamy S, Thangavelu K, Chen SM, Velusamy V, Chen TW, Kannan RS. Preparation and characterization of a novel hybrid hydrogel composite of chitin stabilized graphite: Application for selective and simultaneous electrochemical detection of dihydroxybenzene isomers in water. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2016.12.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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161
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Anraku M, Tabuchi R, Ifuku S, Nagae T, Iohara D, Tomida H, Uekama K, Maruyama T, Miyamura S, Hirayama F, Otagiri M. An oral absorbent, surface-deacetylated chitin nano-fiber ameliorates renal injury and oxidative stress in 5/6 nephrectomized rats. Carbohydr Polym 2016; 161:21-25. [PMID: 28189231 DOI: 10.1016/j.carbpol.2016.12.057] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 12/21/2016] [Accepted: 12/22/2016] [Indexed: 12/17/2022]
Abstract
In this study, we report that surface-deacetylated chitin nano-fibers (SDACNFs) are more effective in decreasing renal injury and oxidative stress than deacetylated chitin powder (DAC) in 5/6 nephrectomized rats. An oral administration of low doses of SDACNFs (40mg/kg/day) over a 4 week period resulted in a significant decrease in serum indoxyl sulfate, creatinine and urea nitrogen levels, compared with a similar treatment with DAC or AST-120. The SDACNFs treatment also resulted in an increase in antioxidant potential, compared with that for DAC or AST-120. Immunohistochemical analyses also demonstrated that SDACNFs treated CRF rats showed a decrease in the amount of accumulated 8-OHdG compared with the CRF group. These results suggest that the ingestion of SDCH-NF results in a significant reduction in the levels of pro-oxidants, such as uremic toxins, in the gastrointestinal tract, thereby inhibiting the subsequent development of oxidative stress in the systemic circulation.
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Affiliation(s)
- Makoto Anraku
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan.
| | - Ryo Tabuchi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8552, Japan
| | - Tomone Nagae
- Graduate School of Engineering, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8552, Japan
| | - Daisuke Iohara
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Hisao Tomida
- Faculty of Pharmacy and Pharmaceutical Sciences, Fukuyama University, Sanzo 1, Gakuen-cho, Fukuyama 729-0292, Japan
| | - Kaneto Uekama
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Toru Maruyama
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Shigeyuki Miyamura
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Fumitoshi Hirayama
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan.
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162
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Manabe K, Tanaka C, Moriyama Y, Tenjimbayashi M, Nakamura C, Tokura Y, Matsubayashi T, Kyung KH, Shiratori S. Chitin Nanofibers Extracted from Crab Shells in Broadband Visible Antireflection Coatings with Controlling Layer-by-Layer Deposition and the Application for Durable Antifog Surfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:31951-31958. [PMID: 27801561 DOI: 10.1021/acsami.6b11786] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Reflection from various surfaces of many optical systems, such as photovoltaics and displays, is a critical issue for their performance, and antireflection coatings play a pivotal role in a wide variety of optical technologies, reducing light reflectance loss and hence maximizing light transmission. With the current movement toward optically transparent polymeric media and coatings for antireflection technology, the need for economical and environmentally friendly materials and methods without dependence on shape or size has clearly been apparent. Herein, we demonstrate novel antireflection coatings composed of chitin nanofibers (CHINFs), extracted from crab shell as a biomass material through an aqueous-based layer-by-layer self-assembly process to control the porosity. Increasing the number of air spaces inside the membrane led low refractive index, and precise control of refractive index derived from the stacking of the CHINFs achieved the highest transmittance with investigating the surface structure and the refractive index depending on the solution pH. At a wavelength of 550 nm, the transmittance of the coatings was 96.4%, which was 4.8% higher than that of a glass substrate, and their refractive index was 1.30. Further critical properties of the films were the durability and the antifogging performance derived from the mechanical stability and hydrophilicity of CHINFs, respectively. The present study may contribute to a development of systematically designed nanofibrous films which are suitable for optical applications operating at a broadband visible wavelength with durability and antifog surfaces.
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Affiliation(s)
| | | | | | | | | | | | | | - Kyu-Hong Kyung
- SNT Co., Ltd. , 7-1 Shinkawasaki, Saiwai-ku, Kawasaki, Kanagawa 212-0032, Japan
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163
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Effect of chitin nanofiber on the morphological and physical properties of chitosan/silver nanoparticle bionanocomposite films. Int J Biol Macromol 2016; 92:461-466. [DOI: 10.1016/j.ijbiomac.2016.07.051] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/11/2016] [Accepted: 07/14/2016] [Indexed: 11/21/2022]
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164
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Ding B, Zhao D, Song J, Gao H, Xu D, Xu M, Cao X, Zhang L, Cai J. Light weight, mechanically strong and biocompatible α-chitin aerogels from different aqueous alkali hydroxide/urea solutions. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0205-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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165
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Yataka Y, Sawada T, Serizawa T. Multidimensional Self-Assembled Structures of Alkylated Cellulose Oligomers Synthesized via in Vitro Enzymatic Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10120-10125. [PMID: 27606835 DOI: 10.1021/acs.langmuir.6b02679] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The self-assembly of biomolecules into highly ordered nano-to-macroscale structures is essential in the construction of biological tissues and organs. A variety of biomolecular assemblies composed of nucleic acids, peptides, and lipids have been used as molecular building units for self-assembled materials. However, crystalline polysaccharides have rarely been utilized in self-assembled materials. In this study, we describe multidimensional self-assembled structures of alkylated cellulose oligomers synthesized via in vitro enzymatic reactions. We found that the alkyl chain length drastically affected the assembled morphologies and allomorphs of cellulose moieties. The modulation of the intermolecular interactions of cellulose oligomers by alkyl substituents was highly effective at controlling their assembly into multidimensional structures. This study proposes a new potential of crystalline oligosaccharides for structural components of molecular assemblies with controlled morphologies and crystal structures.
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Affiliation(s)
- Yusuke Yataka
- Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshiki Sawada
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Takeshi Serizawa
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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166
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Preparation and characterization of chitosan based injectable hydrogels enhanced by chitin nano-whiskers. J Mech Behav Biomed Mater 2016; 65:466-477. [PMID: 27665082 DOI: 10.1016/j.jmbbm.2016.09.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 09/06/2016] [Accepted: 09/07/2016] [Indexed: 11/20/2022]
Abstract
The objective of current study was to prepare an injectable hydrogel with great mechanical properties and biological compatibility, which could be more suitable to be applied as tissue engineering scaffold. Chitin nano-whiskers (CNWs) were introduced into chitosan/β-glycerophosphate disodium salt (CS/GP) injectable hydrogel. The effects of CNWs contents and gelation temperatures on gelation speed and mechanical properties of the composite hydrogels were characterized and discussed. The maximum values of tensile strength and elongation at break were both more than 4 times larger than that of neat CS/GP hydrogel. The gelation time of injectable hydrogel with 5% CNWs content (formed at 37°C) was 25 seconds, which was much shorter than that (6038 seconds) of the neat CS/GP hydrogel. In combination with results of Fourier transform infrared spectroscopy (FT-IR), it was proved that CNWs functioned as a cross-linker through hydrogen bond interaction in the gel formation process, which might be the main reason for mechanical enhancement. Meanwhile, gels formed with higher CNWs content and gelation temperature had lower equilibrium swelling ratio and drug release rate. Cytotoxicity of hydrogel in vitro was studied by MTT method with a result of indicating a good biocompatibility of CNWs enhanced hydrogel.
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167
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Ling S, Li C, Jin K, Kaplan DL, Buehler MJ. Liquid Exfoliated Natural Silk Nanofibrils: Applications in Optical and Electrical Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:7783-90. [PMID: 27352291 DOI: 10.1002/adma.201601783] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 05/17/2016] [Indexed: 05/02/2023]
Abstract
A method to directly extract silk nanofibrils from native silk fibers at the single nanofibrils scale is reported. The resulting silk nanofibrils, which retain structural features and physical properties of native silk fibers, show potential utility in optical and electronic devices.
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Affiliation(s)
- Shengjie Ling
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Chunmei Li
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Kai Jin
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA.
| | - Markus J Buehler
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
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168
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Araki J, Iida M. Surface carboxylation of cellulose nanowhiskers using mPEG-TEMPO: its recovery and recycling. Polym J 2016. [DOI: 10.1038/pj.2016.65] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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169
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Tabuchi R, Azuma K, Izumi R, Tanou T, Okamoto Y, Nagae T, Iohara D, Uekama K, Otagiri M, Hirayama F, Ifuku S, Anraku M. Biomaterials based on freeze dried surface-deacetylated chitin nanofibers reinforced with sulfobutyl ether β-cyclodextrin gel in wound dressing applications. Int J Pharm 2016; 511:1080-7. [PMID: 27521704 DOI: 10.1016/j.ijpharm.2016.08.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/05/2016] [Accepted: 08/08/2016] [Indexed: 12/15/2022]
Abstract
A freeze-dried gel composed of surface-deacetylated chitin nanofibers (SDACNFs), reinforced with an anionic cyclodextrin, sulfobutyl ether β-cyclodextrin (SBE-β-CD) was evaluated for treating wounds in a rat model, and the results were compared with a SDACNFs gel without SBE-β-CD. The incorporation of prednisolone (PD), a poorly water-soluble drug, in both types of gels and its release from the gels were also compared. In both cases, wound areas were decreased and their effect was higher than that of commercially available wound dressings. The rate of release of PD from the freeze-dried SDACNFs/SBE-β-CD was much faster than that form SDACNFs alone without SBE-β-CD, due to fact that the PD is more soluble in the amorphous SBE-β-CD complex compared to the other preparations. The findings indicate that the freeze-dried SDACNFs/SBE-β-CD gel would be beneficial as a new biomaterial for the treatment of wounds and for preparing homogeneous high-content gels that contain poorly water-soluble drugs.
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Affiliation(s)
- Ryo Tabuchi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan
| | - Ryotaro Izumi
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan
| | - Tsubasa Tanou
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan
| | - Tomone Nagae
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan
| | - Daisuke Iohara
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Kaneto Uekama
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Fumitoshi Hirayama
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan.
| | - Makoto Anraku
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan; DDS Research Institute, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan.
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170
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Effects of chitin nano-whiskers on the antibacterial and physicochemical properties of maize starch films. Carbohydr Polym 2016; 147:372-378. [DOI: 10.1016/j.carbpol.2016.03.095] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 03/28/2016] [Accepted: 03/29/2016] [Indexed: 11/23/2022]
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171
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Araki J, Moriguchi Y. Facile preparation of chitin nanowhisker-gold nanocluster hybrids: effect of feeding ratio and surface amino group contents on gold absorption amount. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3860] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun Araki
- Faculty of Textile Science and Technology; Shinshu University; Tokida 3-15-1 Ueda Nagano Prefecture 386-8567 Japan
- Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER); Shinshu University; Tokida 3-15-1 Ueda Nagano Prefecture 386-8567 Japan
| | - Yuki Moriguchi
- Graduate School of Science and Technology; Shinshu University; Tokida 3-15-1 Ueda Nagano Prefecture 386-8567 Japan
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172
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Jin J, Lee D, Im HG, Han YC, Jeong EG, Rolandi M, Choi KC, Bae BS. Chitin Nanofiber Transparent Paper for Flexible Green Electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5169-75. [PMID: 27146562 DOI: 10.1002/adma.201600336] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 03/03/2016] [Indexed: 05/05/2023]
Abstract
A transparent paper made of chitin nanofibers (ChNF) is introduced and its utilization as a substrate for flexible organic light-emitting diodes is demonstrated. Given its promising macroscopic properties, biofriendly characteristics, and availability of the raw material, the utilization of the ChNF transparent paper as a structural platform for flexible green electronics is envisaged.
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Affiliation(s)
- Jungho Jin
- School of Materials Science and Engineering, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan, 44610, Republic of Korea
| | - Daewon Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyeon-Gyun Im
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Yun Cheol Han
- Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Eun Gyo Jeong
- Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Marco Rolandi
- Department of Electrical Engineering, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA, 95064, USA
| | - Kyung Cheol Choi
- Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Byeong-Soo Bae
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
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173
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Abstract
AbstractChitin (β-(1-4)-poly-N-acetyl-D-glucosamine) is widely distributed in nature. A method for the preparation of chitin nanofibers (CNFs) is reported. CNFs are considered to have several potential applications because they have useful properties such as high specific surface area and porosity. More recently, beneficial effects of CNF as functional foods were reported. First, the anti-inflammatory effect of oral administration of chitin CNFs was demonstrated in a mouse model of inflammatory bowel disease (IBD). It was found that CNFs improved clinical symptoms and suppressed IBD. CNFs decreased the areas with nuclear factor-κB (NF-κB) staining in colon tissue. Second, the anti-obesity effects of surface-deacetylated chitin nanofibers (SDACNF) in a mouse model of high-fat diet-induced obesity was evaluated. SDACNFs suppressed the increase in body weight produced by the high-fat diet; however, CNFs did not suppress such weight gain. SDACNFs decreased serum levels of leptin. These results suggest that CNF and SDACNF are promising functional foods for patients with IBD or obesity.
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Affiliation(s)
- Kazuo Azuma
- 1Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8553, Japan, Tel./Fax: +81-857-31-5433
| | - Shinsuke Ifuku
- 2Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan
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174
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A Review on Grafting of Biofibers for Biocomposites. MATERIALS 2016; 9:ma9040303. [PMID: 28773429 PMCID: PMC5502996 DOI: 10.3390/ma9040303] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/14/2016] [Accepted: 04/18/2016] [Indexed: 12/18/2022]
Abstract
A recent increase in the use of biofibers as low-cost and renewable reinforcement for the polymer biocomposites has been seen globally. Biofibers are classified into: lignocellulosic fibers (i.e., cellulose, wood and natural fibers), nanocellulose (i.e., cellulose nanocrystals and cellulose nanofibrils), and bacterial cellulose, while polymer matrix materials can be petroleum based or bio-based. Green biocomposites can be produced using both biobased fibers and polymers. Incompatibility between the hydrophilic biofibers and hydrophobic polymer matrix can cause performance failure of resulting biocomposites. Diverse efforts have focused on the modification of biofibers in order to improve the performances of biocomposites. “Grafting” copolymerization strategy can render the advantages of biofiber and impart polymer properties onto it and the performance of biocomposites can be tuned through changing grafting parameters. This review presents a short overview of various “grafting” methods which can be directly or potentially employed to enhance the interaction between biofibers and a polymer matrix for biocomposites. Major grafting techniques, including ring opening polymerization, grafting via coupling agent and free radical induced grafting, have been discussed. Improved properties such as mechanical, thermal, and water resistance have provided grafted biocomposites with new opportunities for applications in specific industries.
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175
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Guo H, Jeong JH, Kim JC. Electrospun thermo-responsive nanofibers of poly(hydroxyethylacrylate-co-coumaryl acrylate-co-ethylmethacrylate). Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.01.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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176
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Izumi R, Azuma K, Izawa H, Morimoto M, Nagashima M, Osaki T, Tsuka T, Imagawa T, Ito N, Okamoto Y, Saimoto H, Ifuku S. Chitin nanofibrils suppress skin inflammation in atopic dermatitis-like skin lesions in NC/Nga mice. Carbohydr Polym 2016; 146:320-7. [PMID: 27112880 DOI: 10.1016/j.carbpol.2016.03.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 03/19/2016] [Accepted: 03/22/2016] [Indexed: 12/11/2022]
Abstract
We evaluated the effect of chitin nanofibril (CNF) application via skin swabs on an experimental atopic dermatitis (AD) model. AD scores were lower, and hypertrophy and hyperkeratosis of the epidermis were suppressed after CNF treatment. Furthermore, inflammatory cell infiltration in both the epidermis and dermis was inhibited. CNFs also attenuated histological scores. The suppressive effects of CNFs were equal to those of corticosteroid application; however, chitin did not show these effects. CNF application might have anti-infllammatory effects via suppression of the activation of nuclear factor-kappa B, cyclooxygenase-2, and inducible nitric oxide synthase. In an early-stage model of experimental AD, CNFs suppressed AD progression to the same extent as corticosteroids. They also suppressed skin inflammation and IgE serum levels. Our findings indicate that CNF application could aid in the prevention or treatment of AD skin lesions.
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Affiliation(s)
- Ryotaro Izumi
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan.
| | - Kazuo Azuma
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan.
| | - Hironori Izawa
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan.
| | - Minoru Morimoto
- Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University, Tottori 680-8550, Japan.
| | - Masaaki Nagashima
- Regional Industrial Academic Cooperation, Tottori University, Tottori 680-0833, Japan.
| | - Tomohiro Osaki
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan.
| | - Takeshi Tsuka
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Imagawa
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan.
| | - Norihiko Ito
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan.
| | - Yoshiharu Okamoto
- Department of Veterinary Clinical Medicine, Tottori University, Tottori 680-8533, Japan.
| | - Hiroyuki Saimoto
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8533, Japan.
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177
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Singh BK, Dutta PK. Chitin, Chitosan, and Silk Fibroin Electrospun Nanofibrous Scaffolds: A Prospective Approach for Regenerative Medicine. SPRINGER SERIES ON POLYMER AND COMPOSITE MATERIALS 2016. [DOI: 10.1007/978-81-322-2511-9_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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178
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Gong T, Xie J, Liao J, Zhang T, Lin S, Lin Y. Nanomaterials and bone regeneration. Bone Res 2015; 3:15029. [PMID: 26558141 PMCID: PMC4639780 DOI: 10.1038/boneres.2015.29] [Citation(s) in RCA: 288] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 08/20/2015] [Accepted: 08/26/2015] [Indexed: 02/05/2023] Open
Abstract
The worldwide incidence of bone disorders and conditions has been increasing. Bone is a nanomaterials composed of organic (mainly collagen) and inorganic (mainly nano-hydroxyapatite) components, with a hierarchical structure ranging from nanoscale to macroscale. In consideration of the serious limitation in traditional therapies, nanomaterials provide some new strategy in bone regeneration. Nanostructured scaffolds provide a closer structural support approximation to native bone architecture for the cells and regulate cell proliferation, differentiation, and migration, which results in the formation of functional tissues. In this article, we focused on reviewing the classification and design of nanostructured materials and nanocarrier materials for bone regeneration, their cell interaction properties, and their application in bone tissue engineering and regeneration. Furthermore, some new challenges about the future research on the application of nanomaterials for bone regeneration are described in the conclusion and perspectives part.
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Affiliation(s)
- Tao Gong
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, P.R. China
| | - Jing Xie
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, P.R. China
| | - Jinfeng Liao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, P.R. China
| | - Tao Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, P.R. China
| | - Shiyu Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, P.R. China
| | - Yunfeng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu 610041, P.R. China
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179
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Doubly curved nanofiber-reinforced optically transparent composites. Sci Rep 2015; 5:16421. [PMID: 26552990 PMCID: PMC4639763 DOI: 10.1038/srep16421] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 10/12/2015] [Indexed: 11/08/2022] Open
Abstract
Doubly curved nanofiber-reinforced optically transparent composites with low thermal expansion of 15 ppm/k are prepared by hot pressing vacuum-filtered Pickering emulsions of hydrophobic acrylic resin monomer, hydrophilic chitin nanofibers and water. The coalescence of acrylic monomer droplets in the emulsion is prevented by the chitin nanofibers network. This transparent composite has 3D shape moldability, making it attractive for optical precision parts.
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180
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Shibakami M, Tsubouchi G, Sohma M, Hayashi M. Preparation of transparent self-standing thin films made from acetylated euglenoid β-1,3-glucans. Carbohydr Polym 2015; 133:421-8. [DOI: 10.1016/j.carbpol.2015.06.104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/26/2015] [Accepted: 06/27/2015] [Indexed: 10/23/2022]
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181
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Anraku M, Tabuchi R, Ifuku S, Ishiguro T, Iohara D, Hirayama F. Surface-Deacetylated Chitin Nano-Fiber/Hyaluronic Acid Composites as Potential Antioxidative Compounds for Use in Extended-Release Matrix Tablets. Int J Mol Sci 2015; 16:24707-17. [PMID: 26501272 PMCID: PMC4632772 DOI: 10.3390/ijms161024707] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 10/09/2015] [Accepted: 10/10/2015] [Indexed: 01/08/2023] Open
Abstract
In this study, we examined a possible use of a surface-deacetylated chitin nano-fiber (SDCH-NF) and hyaluronic acid (HA) interpolymer complex (IPC) tablet as a potential antioxidative compound in extended-release matrix tablets. The antioxidant properties of untreated chitin (UCH), SDCH-NF, and HA were examined using N-centered radicals derived from 1,1'-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). SDCH-NF and HA had acceptable scavenging abilities and were relatively efficient radical scavengers, but UCH was much less effective. The results suggest that SDCH-NF and HA could serve as scavengers of compounds related to the development of oxidative stress. An SDCH-NF/HA IPC tablet was prepared and evaluated as an extended-release tablet matrix using famotidine (FMT) as a model drug. The release of FMT from the IPC tablet (DCF-NF:HA=1:1) was slower than that from a SDCH-NF only tablet. Turbidity measurements and X-ray diffraction (XRD) data also indicated that the optimum complexation ratio for IPC between SDCH-NF/HA is 1/1, resulting in a good relationship between turbidity or XRD of the complex and the release ratio of FMT. These results suggest that an SDCH-NF/HA tablet has the potential for use in an extended-release IPC tablet with a high antioxidant activity.
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Affiliation(s)
- Makoto Anraku
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
- DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
| | - Ryo Tabuchi
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8552, Japan.
| | - Takako Ishiguro
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
| | - Daisuke Iohara
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
| | - Fumitoshi Hirayama
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
- DDS Research Institute, Sojo University, 4-22-1 Ikeda, Nishi-Ku, Kumamoto 860-0082, Japan.
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182
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Azuma K, Izumi R, Kawata M, Nagae T, Osaki T, Murahata Y, Tsuka T, Imagawa T, Ito N, Okamoto Y, Morimoto M, Izawa H, Saimoto H, Ifuku S. Effects of Oral Administration of Chitin Nanofiber on Plasma Metabolites and Gut Microorganisms. Int J Mol Sci 2015; 16:21931-49. [PMID: 26378523 PMCID: PMC4613289 DOI: 10.3390/ijms160921931] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 09/05/2015] [Accepted: 09/07/2015] [Indexed: 12/29/2022] Open
Abstract
The aim of this study was to examine the effects of oral administration of chitin nanofibers (CNFs) and surface-deacetylated (SDA) CNFs on plasma metabolites using metabolome analysis. Furthermore, we determined the changes in gut microbiota and fecal organic acid concentrations following oral administrations of CNFs and SDACNFs. Healthy female mice (six-week-old) were fed a normal diet and administered tap water with 0.1% (v/v) CNFs or SDACNFs for 28 days. Oral administration of CNFs increased plasma levels of adenosine triphosphate (ATP), adenosine diphosphate (ADP), and serotonin (5-hydroxytryptamine, 5-HT). Oral administration of SDACNFs affected the metabolisms of acyl-carnitines and fatty acids. The fecal organic level analysis indicated that oral administration of CNFs stimulated and activated the functions of microbiota. These results indicate that oral administration of CNFs increases plasma levels of ATP and 5-HT via activation of gut microbiota.
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Affiliation(s)
- Kazuo Azuma
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Ryotaro Izumi
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Mari Kawata
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Tomone Nagae
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Tomohiro Osaki
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Yusuke Murahata
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Takeshi Tsuka
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Imagawa
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Norihiko Ito
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Yoshiharu Okamoto
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Minoru Morimoto
- Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University, Tottori 680-8550, Japan.
| | - Hironori Izawa
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Hiroyuki Saimoto
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
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183
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Koshy RR, Mary SK, Thomas S, Pothan LA. Environment friendly green composites based on soy protein isolate – A review. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2015.04.023] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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184
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Azuma K, Nagae T, Nagai T, Izawa H, Morimoto M, Murahata Y, Osaki T, Tsuka T, Imagawa T, Ito N, Okamoto Y, Saimoto H, Ifuku S. Effects of Surface-Deacetylated Chitin Nanofibers in an Experimental Model of Hypercholesterolemia. Int J Mol Sci 2015; 16:17445-55. [PMID: 26263969 PMCID: PMC4581201 DOI: 10.3390/ijms160817445] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 07/23/2015] [Accepted: 07/23/2015] [Indexed: 01/05/2023] Open
Abstract
This study evaluated the effects of oral administration of surface-deacetylated chitin nanofibers (SDACNFs) on hypercholesterolemia using an experimental model. All rats were fed a high cholesterol diet with 1% w/w cholesterol and 0.5% w/w cholic acid for 28 days. Rats were divided equally into four groups: the control group was administered 0.05% acetic acid dissolved in tap water, and the SDACNF, chitosan (CS), and cellulose nanofiber (CLNF) groups were administered 0.1% CNF, CS, or CLNF dissolved in the tap water, respectively, during the experimental period. Changes in body weight, intake of food and water, and organ weight were measured. Serum blood chemistry and histopathological examination of the liver were performed. Administration of SDACNF did not affect body weight change, food and water intake, or organ weights. Administration of SDACNF and CS decreased the diet-induced increase in serum total cholesterol, chylomicron, very-low-density lipoprotein, and phospholipid levels on day 14. Moreover, oral administration of SDACNFs suppressed the increase of alanine transaminase levels on day 29 and suppressed vacuolar degeneration and accumulation of lipid droplets in liver tissue. These data indicate that SDACNF has potential as a functional food for patients with hypercholesterolemia.
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Affiliation(s)
- Kazuo Azuma
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomone Nagae
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Takeshi Nagai
- Japan Food Research Laboratories, Tama 206-0025, Japan.
| | - Hironori Izawa
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Minoru Morimoto
- Division of Instrumental Analysis, Research Center for Bioscience and Technology, Tottori University, Tottori 680-8550, Japan.
| | - Yusuke Murahata
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Osaki
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Takeshi Tsuka
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Tomohiro Imagawa
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Norihiko Ito
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Yoshiharu Okamoto
- Department of Clinical Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan.
| | - Hiroyuki Saimoto
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
| | - Shinsuke Ifuku
- Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan.
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185
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186
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Izumi R, Komada S, Ochi K, Karasawa L, Osaki T, Murahata Y, Tsuka T, Imagawa T, Itoh N, Okamoto Y, Izawa H, Morimoto M, Saimoto H, Azuma K, Ifuku S. Favorable effects of superficially deacetylated chitin nanofibrils on the wound healing process. Carbohydr Polym 2015; 123:461-7. [DOI: 10.1016/j.carbpol.2015.02.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 10/24/2022]
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187
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Salaberria AM, Diaz RH, Labidi J, Fernandes SC. Preparing valuable renewable nanocomposite films based exclusively on oceanic biomass – Chitin nanofillers and chitosan. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2015.03.003] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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188
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Qin A, Li X, Zhao X, Liu D, He C. Preparation and characterization of nano-chitin whisker reinforced PVDF membrane with excellent antifouling property. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.01.035] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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189
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Role of chitin nanocrystals and nanofibers on physical, mechanical and functional properties in thermoplastic starch films. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2014.12.016] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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190
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Anraku M, Iohara D, Hiraga A, Uekama K, Ifuku S, Pipkin JD, Hirayama F. Formation of Elastic Gels from Deacetylated Chitin Nanofibers Reinforced with Sulfobutyl Ether β-Cyclodextrin. CHEM LETT 2015. [DOI: 10.1246/cl.141004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | - Ayumu Hiraga
- Faculty of Pharmaceutical Sciences, Sojo University
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191
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Facile preparation of silver nanoparticles immobilized on chitin nanofiber surfaces to endow antifungal activities. Carbohydr Polym 2015; 117:813-817. [DOI: 10.1016/j.carbpol.2014.10.042] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 10/14/2014] [Accepted: 10/17/2014] [Indexed: 11/22/2022]
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192
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Xiao S, Gao R, Lu Y, Li J, Sun Q. Fabrication and characterization of nanofibrillated cellulose and its aerogels from natural pine needles. Carbohydr Polym 2015; 119:202-9. [DOI: 10.1016/j.carbpol.2014.11.041] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 11/11/2014] [Accepted: 11/19/2014] [Indexed: 10/24/2022]
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193
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Duan B, Zheng X, Xia Z, Fan X, Guo L, Liu J, Wang Y, Ye Q, Zhang L. Highly biocompatible nanofibrous microspheres self-assembled from chitin in NaOH/urea aqueous solution as cell carriers. Angew Chem Int Ed Engl 2015; 54:5152-6. [PMID: 25712796 DOI: 10.1002/anie.201412129] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 01/22/2015] [Indexed: 12/29/2022]
Abstract
In this work, chitin microspheres (NCM) having a nanofibrous architecture were constructed using a "bottom-up" fabrication pathway. The chitin chains rapidly self-assembled into nanofibers in NaOH/urea aqueous solution by a thermally induced method and subsequently formed weaved microspheres. The diameter of the chitin nanofibers and the size of the NCM were tunable by controlling the temperature and the processing parameters to be in the range from 26 to 55 nm and 3 to 130 μm, respectively. As a result of the nanofibrous surface and the inherent biocompatibility of chitin, cells could adhere to the chitin microspheres and showed a high attachment efficiency, indicating the great potential of the NCM for 3D cell microcarriers.
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Affiliation(s)
- Bo Duan
- College of Chemistry & Molecule Science, Wuhan University, Wuhan, 430072 (China)
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194
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Duan B, Zheng X, Xia Z, Fan X, Guo L, Liu J, Wang Y, Ye Q, Zhang L. Highly Biocompatible Nanofibrous Microspheres Self-Assembled from Chitin in NaOH/Urea Aqueous Solution as Cell Carriers. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412129] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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195
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Zhang F, You X, Dou H, Liu Z, Zuo B, Zhang X. Facile fabrication of robust silk nanofibril films via direct dissolution of silk in CaCl2-formic acid solution. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3352-61. [PMID: 25603225 DOI: 10.1021/am508319h] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study, we report for the first time a novel silk fibroin (SF) nanofibrous films with robust mechanical properties that was fabricated by directly dissolving silk in CaCl2-formic acid solution. CaCl2-FA dissolved silk rapidly at room temperature, and more importantly, it disintegrated silk into nanofibrils instead of separate molecules. The morphology of nanofibrils crucially depended on CaCl2 concentrations, which resulted in different aggregation nanostructure in SF films. The SF film after drawing had maximum elastic modulus, ultimate tensile strength, and strain at break reaching 4 GPa, 106 MPa, and 29%, respectively, in dry state and 206 MPa, 28 MPa, and 188%, respectively, in wet state. Moreover, multiple yielding phenomena and substantially strain-hardening behavior was also observed in the stretched films, indicating the important role played by preparation method in regulating the mechanical properties of SF films. These exceptional and unique mechanical properties were suggested to be caused by preserving silk nanofibril during dissolution and stretching to align these nanofibrils. Furthermore, the SF films exhibit excellent biocompatibility, supporting marrow stromal cells adhesion and proliferation. The film preparation was facile, and the resulting SF films manifested enhanced mechanical properties, unique nanofibrous structures, and good biocompability.
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Affiliation(s)
- Feng Zhang
- Medical College of Soochow University, Jiangsu Province Key Laboratory of Stem Cell Research, Soochow University , Suzhou 215123, China
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196
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197
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Ifuku S, Hori T, Izawa H, Morimoto M, Saimoto H. Preparation of zwitterionically charged nanocrystals by surface TEMPO-mediated oxidation and partial deacetylation of α-chitin. Carbohydr Polym 2015; 122:1-4. [PMID: 25817635 DOI: 10.1016/j.carbpol.2014.12.060] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 12/24/2014] [Accepted: 12/27/2014] [Indexed: 11/26/2022]
Abstract
Zwitterionic nanocrystals were prepared by TEMPO-mediated oxidation, partial deacetylation, and subsequent mechanical disintegration of α-chitin. The pH dependence of the morphology, transparency, and viscosity of the nanocrystals were evaluated. After those reactions, the carboxylate and amino group contents of the chitin derivative were 0.45 and 1.26 mmol/g, respectively. After mechanical treatment, the water dispersion consisted of nanocrystals approximately 250 nm long and 10nm thick. Under acidic and basic conditions, the water dispersions were highly transparent. On the other hand, under neutral conditions, the dispersion was turbid due to the ionic interaction between the cationic and anionic groups on the nanocrystal surface. Although the surface zwitterionic nanocrystals collected from acidic and basic dispersion were randomly oriented due to electrostatic repulsions, nanocrystals formed aggregates in neutral water due to the cationic and anionic interaction between them. Nanocrystals in neutral water had higher viscosity than those in acidic and basic water, since ionic interaction caused nanocrystal networks to form in water.
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Affiliation(s)
- Shinsuke Ifuku
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan.
| | - Taishi Hori
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan
| | - Hironori Izawa
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan
| | - Minoru Morimoto
- Research Center for Bioscience and Technology, Tottori University, 4-101 Koyama-cho, Minami 680-8550, Tottori, Japan
| | - Hiroyuki Saimoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, 4-101 Koyama-cho, Minami 680-8552, Tottori, Japan
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198
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Ifuku S, Urakami T, Izawa H, Morimoto M, Saimoto H. Preparation of a protein–chitin nanofiber complex from crab shells and its application as a reinforcement filler or substrate for biomineralization. RSC Adv 2015. [DOI: 10.1039/c5ra12761k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A protein–chitin nanofiber complex was successfully prepared from crab shells by a mechanical treatment after the removal of CaCO3.
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Affiliation(s)
- Shinsuke Ifuku
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori
- Japan
| | - Takeshi Urakami
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori
- Japan
| | - Hironori Izawa
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori
- Japan
| | - Minoru Morimoto
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori
- Japan
| | - Hiroyuki Saimoto
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori
- Japan
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199
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Facile preparation of surface N -halamine chitin nanofiber to endow antibacterial and antifungal activities. Carbohydr Polym 2015; 115:342-7. [DOI: 10.1016/j.carbpol.2014.08.094] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 08/19/2014] [Accepted: 08/25/2014] [Indexed: 11/23/2022]
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200
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Kadokawa JI. Fabrication of nanostructured and microstructured chitin materials through gelation with suitable dispersion media. RSC Adv 2015. [DOI: 10.1039/c4ra15319g] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Regeneration from chitin gels with suitable dispersion media results in the efficient fabrication of nano- and microstructured materials.
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Affiliation(s)
- Jun-ichi Kadokawa
- Graduate School of Science and Engineering
- Kagoshima University
- Kagoshima 890-0065
- Japan
- Research Center for Environmentally Friendly Materials Engineering
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