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Takahashi T, Zhang H, Agetsuma M, Nabekura J, Otomo K, Okamura Y, Nemoto T. Large-scale cranial window for in vivo mouse brain imaging utilizing fluoropolymer nanosheet and light-curable resin. Commun Biol 2024; 7:232. [PMID: 38438546 PMCID: PMC10912766 DOI: 10.1038/s42003-024-05865-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 01/26/2024] [Indexed: 03/06/2024] Open
Abstract
Two-photon microscopy enables in vivo imaging of neuronal activity in mammalian brains at high resolution. However, two-photon imaging tools for stable, long-term, and simultaneous study of multiple brain regions in same mice are lacking. Here, we propose a method to create large cranial windows covering such as the whole parietal cortex and cerebellum in mice using fluoropolymer nanosheets covered with light-curable resin (termed the 'Nanosheet Incorporated into light-curable REsin' or NIRE method). NIRE method can produce cranial windows conforming the curved cortical and cerebellar surfaces, without motion artifacts in awake mice, and maintain transparency for >5 months. In addition, we demonstrate that NIRE method can be used for in vivo two-photon imaging of neuronal ensembles, individual neurons and subcellular structures such as dendritic spines. The NIRE method can facilitate in vivo large-scale analysis of heretofore inaccessible neural processes, such as the neuroplastic changes associated with maturation, learning and neural pathogenesis.
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Affiliation(s)
- Taiga Takahashi
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Department of Medical and Robotic Engineering Design, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, 125-8585, Japan
| | - Hong Zhang
- Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
- School of Chemical Engineering and Technology, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin, 300350, China
| | - Masakazu Agetsuma
- Division of Homeostatic Development, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
- Quantum Regenerative and Biomedical Engineering Team, Institute for Quantum Life Science, National Institutes for Quantum Science and Technology (QST), Anagawa 4-9-1, Chiba Inage-ku, Chiba, 263-8555, Japan
| | - Junichi Nabekura
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Division of Homeostatic Development, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
| | - Kohei Otomo
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Department of Biochemistry and Systems Biomedicine, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Yosuke Okamura
- Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
- Department of Applied Chemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
- Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
| | - Tomomi Nemoto
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
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Metwally WM, El-Habashy SE, El-Nekhily NA, Mahmoud HE, Eltaher HM, El-Khordagui L. Nano zinc oxide-functionalized nanofibrous microspheres: A bioactive hybrid platform with antimicrobial, regenerative and hemostatic activities. Int J Pharm 2023; 638:122920. [PMID: 37011829 DOI: 10.1016/j.ijpharm.2023.122920] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/27/2023] [Accepted: 03/31/2023] [Indexed: 04/04/2023]
Abstract
Bioactive hybrid constructs are at the cutting edge of innovative biomaterials. PLA nanofibrous microspheres (NF-MS) were functionalized with zinc oxide nanoparticles (nZnO) and DDAB-modified nZnO (D-nZnO) for developing inorganic/nano-microparticulate hybrid constructs (nZnO@NF-MS and D-nZnO@NF-MS) merging antibacterial, regenerative, and haemostatic functionalities. The hybrids appeared as three-dimensional NF-MS frameworks made-up entirely of interconnecting nanofibers embedding nZnO or D-nZnO. Both systems achieved faster release of Zn2+ than their respective nanoparticles and D-nZnO@NF-MS exhibited significantly greater surface wettability than nZnO@NF-MS. Regarding bioactivity, D-nZnO@NF-MS displayed a significantly greater and fast-killing effect against Staphylococcus aureus. Both nZnO@NF-MS and D-nZnO@NF-MS showed controllable concentration-dependent cytotoxicity to human gingival fibroblasts (HGF) compared with pristine NF-MS. They were also more effective than pristine NF-MS in promoting migration of human gingival fibroblasts (HGF) in the in vitro wound healing assay. Although D-nZnO@NF-MS showed greater in vitro hemostatic activity than nZnO@NF-MS, (blood-clotting index 22.82 ± 0.65% vs.54.67 ±2.32%) both structures exhibited instant hemostasis (0 s) with no blood loss (0 mg) in the rat-tail cutting technique. By merging the multiple therapeutic bioactivities of D-nZnO and the 3D-structural properties of NF-MS, the innovative D-nZnO@NF-MS hybrid construct provides a versatile bioactive material platform for different biomedical applications.
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Ishak MQH, Shankar P, Turabayev ME, Kondo T, Honda M, Gurbatov SO, Okamura Y, Iwamori S, Kulinich SA. Biodegradable Polymer Nanosheets Incorporated with Zn-Containing Nanoparticles for Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8101. [PMID: 36431587 PMCID: PMC9694524 DOI: 10.3390/ma15228101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/04/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
So far, poly(L-lactic acid), PLLA nanosheets proved to be promising for wound healing. Such biodegradable materials are easy to prepare, bio-friendly, cost-effective, simple to apply and were shown to protect burn wounds and facilitate their healing. At the same time, certain metal ions are known to be essential for wound healing, which is why this study was motivated by the idea of incorporating PLLA nanosheets with Zn2+ ion containing nanoparticles. Upon being applied on wound, such polymer nanosheets should release Zn2+ ions, which is expected to improve wound healing. The work thus focused on preparing PLLA nanosheets embedded with several kinds of Zn-containing nanoparticles, their characterization and ion-release behavior. ZnCl2 and ZnO nanoparticles were chosen because of their different solubility in water, with the intention to see the dynamics of their Zn2+ ion release in liquid medium with pH around 7.4. Interestingly, the prepared PLLA nanosheets demonstrated quit similar ion release rates, reaching the maximum concentration after about 10 h. This finding implies that such polymer materials can be promising as they are expected to release ions within several hours after their application on skin.
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Affiliation(s)
- M. Q. Hafzan Ishak
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
| | - Prabakaran Shankar
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Japan
| | - Marat E. Turabayev
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
| | - Takahiro Kondo
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Department of Chemistry, Gakushuin University, Toshima-ku, Tokyo 171-0031, Japan
| | - Mitsuhiro Honda
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
| | - Stanislav O. Gurbatov
- Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science, Vladivostok 690041, Russia
- School of Natural Sciences, Far Eastern Federal University, Vladivostok 690091, Russia
| | - Yosuke Okamura
- Department of Applied Chemistry, Tokai University, Hiratsuka 259-1292, Japan
| | - Satoru Iwamori
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Japan
| | - Sergei A. Kulinich
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Japan
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Hatanaka T, Ramphai K, Takimoto S, Kanda H, Motosugi N, Kimura M, Mabuchi T, Oyama M, Takeuchi T, Okamura Y. Potential UV-Protective Effect of Freestanding Biodegradable Nanosheet-Based Sunscreen Preparations in XPA-Deficient Mice. Pharmaceutics 2022; 14:pharmaceutics14020431. [PMID: 35214163 PMCID: PMC8878169 DOI: 10.3390/pharmaceutics14020431] [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: 01/17/2022] [Revised: 02/04/2022] [Accepted: 02/11/2022] [Indexed: 02/01/2023] Open
Abstract
Xeroderma pigmentosum (XP) is a rare autosomal recessive hereditary disorder. As patients with XP are deficient in nucleotide excision repair, they show severe photosensitivity symptoms. Although skin protection from ultraviolet (UV) radiation is essential to improve the life expectancy of such patients, the optimal protective effect is not achieved even with sunscreen application, owing to the low usability of the preparations. Nanosheets are two-dimensional nanostructures with a thickness in the nanometer range. The extremely large aspect ratios of the nanosheets result in high transparency, flexibility, and adhesiveness. Moreover, their high moisture permeability enables their application to any area of the skin for a long time. We fabricated preparations containing avobenzone (BMDBM) based on freestanding poly (L-lactic acid) (PLLA) nanosheets through a spin-coating process. Although monolayered PLLA nanosheets did not contain enough BMDBM to protect against UV radiation, the layered nanosheets, consisting of five discrete BMDBM nanosheets, showed high UV absorbance without lowering the adhesive strength against skin. Inflammatory reactions in XPA-deficient mice after UV radiation were completely suppressed by the application of BMDBM-layered nanosheets to the skin. Thus, the BMDBM layered nanosheet could serve as a potential sunscreen preparation to improve the quality of life of patients with XP.
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Affiliation(s)
- Tomomi Hatanaka
- School of Pharmacy, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado 350-0295, Japan; (M.O.); (T.T.)
- Faculty of Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan; (N.M.); (T.M.)
- Correspondence: (T.H.); (Y.O.)
| | - Khampeeraphan Ramphai
- Department of Applied Chemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka 259-1292, Japan;
| | - Shun Takimoto
- Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka 259-1292, Japan; (S.T.); (H.K.)
| | - Hiromi Kanda
- Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka 259-1292, Japan; (S.T.); (H.K.)
| | - Nami Motosugi
- Faculty of Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan; (N.M.); (T.M.)
| | - Minoru Kimura
- The Institute of Medical Sciences, Tokai University, 143 Shimokasuya, Isehara 259-1193, Japan;
| | - Tomotaka Mabuchi
- Faculty of Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan; (N.M.); (T.M.)
| | - Midori Oyama
- School of Pharmacy, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado 350-0295, Japan; (M.O.); (T.T.)
| | - Tomoharu Takeuchi
- School of Pharmacy, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado 350-0295, Japan; (M.O.); (T.T.)
| | - Yosuke Okamura
- Department of Applied Chemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka 259-1292, Japan;
- Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka 259-1292, Japan; (S.T.); (H.K.)
- Correspondence: (T.H.); (Y.O.)
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Abstract
Uncontrolled bleeding is a major problem in trauma and emergency medicine. While materials for trauma applications would certainly find utility in traditional surgical settings, the unique environment of emergency medicine introduces additional design considerations, including the need for materials that are easily deployed in austere environments. Ideally, these materials would be available off the shelf, could be easily transported, and would be able to be stored at room temperature for some amount of time. Both natural and synthetic materials have been explored for the development of hemostatic materials. This review article provides an overview of classes of materials used for topical hemostats and newer developments in the area of injectable hemostats for use in emergency medicine. Expected final online publication date for the Annual Review of Biomedical Engineering, Volume 24 is June 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Aryssa Simpson
- Joint Department of Biomedical Engineering, University of North Carolina-Chapel Hill and North Carolina State University, Raleigh, North Carolina, USA; .,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
| | - Anita Shukla
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, Rhode Island, USA
| | - Ashley C Brown
- Joint Department of Biomedical Engineering, University of North Carolina-Chapel Hill and North Carolina State University, Raleigh, North Carolina, USA; .,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
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Pressure-Sensitive Nano-Sheet for Optical Pressure Measurement. SENSORS 2021; 21:s21217168. [PMID: 34770474 PMCID: PMC8588189 DOI: 10.3390/s21217168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022]
Abstract
Pressure-Sensitive Paint (PSP) is a powerful measurement technique to obtain pressure distribution on a model of interest by measuring the emission intensity of the PSP coating with a camera. Since a PSP coating is prepared by applying a solution containing an organic solvent, generally, by sprayer, the properties such as the pressure- and the temperature-sensitivity depends on the skill of the person applying it. This fabrication process is one of the barriers to use of the PSP technique because of the legal restrictions on the use of organic solvents. Thus, a sticker-like PSP coating is useful because it does not require the use of organic solvent and the applying skill. In this study, we have fabricated freestanding Pressure-Sensitive Nano-Sheet (PSNS) by a sacrificial layer process using a spin-coating method. We employed Pt(II) meso-tetra(pentafluorophenyl)porphine (PtTFPP) as a pressure-sensitive dye and poly(1-trimethylsilyl-propyne) (PTMSP) and poly(L-lactic acid) (PLLA) as a polymer binder; thus, the PSNS samples based on PTMSP and PLLA were prepared. The pressure- and the temperature-sensitivity, the lifetime of the luminescence, and the quantum yield of the fabricated PSNS have been investigated. The pressure-sensitivity of PTMSP-based PSNS is higher than that of PLLA-based PSNS. Conversely, the quantum yield of PLLA-based PSNS is higher than that of PTMSP-based PSNS.
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Chen CH, Cheng YH, Chen SH, Chuang ADC, Chen JP. Functional Hyaluronic Acid-Polylactic Acid/Silver Nanoparticles Core-Sheath Nanofiber Membranes for Prevention of Post-Operative Tendon Adhesion. Int J Mol Sci 2021; 22:ijms22168781. [PMID: 34445516 PMCID: PMC8396318 DOI: 10.3390/ijms22168781] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, we prepared core-sheath nanofiber membranes (CSNFMs) with silver nanoparticles (Ag NPs) embedding in the polylactic acid (PLA) nanofiber sheath and hyaluronic acid (HA) in the nanofiber core. The PLA/Ag NPs sheath provides mechanical support as well as anti-bacterial and anti-inflammatory properties. The controlled release of HA from the core could exert anti-adhesion effects to promote tendon sliding while reducing fibroblast attachment. From the microfibrous structural nature of CSNFMs, they function as barrier membranes to reduce fibroblast penetration without hampering nutrient transports to prevent post-operative peritendinous adhesion. As the anti-adhesion efficacy will depend on release rate of HA from the core as well as Ag NP from the sheath, we fabricated CSNFMs of comparable fiber diameter, but with thick (Tk) or thin (Tn) sheath. Similar CSNFMs with thick (Tk+) and thin (Tn+) sheath but with embedded Ag NPs in the sheath were also prepared. The physico-chemical properties of the barrier membranes were characterized in details, together with their biological response including cell penetration, cell attachment and proliferation, and cytotoxicity. Peritendinous anti-adhesion models in rabbits were used to test the efficacy of CSNFMs as anti-adhesion barriers, from gross observation, histology, and biomechanical tests. Overall, the CSNFM with thin-sheath and Ag NPs (Tn+) shows antibacterial activity with low cytotoxicity, prevents fibroblast penetration, and exerts the highest efficacy in reducing fibroblast attachment in vitro. From in vivo studies, the Tn+ membrane also shows significant improvement in preventing peritendinous adhesions as well as anti-inflammatory efficacy, compared with Tk and Tn CSNFMs and a commercial adhesion barrier film (SurgiWrap®) made from PLA.
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Affiliation(s)
- Chih-Hao Chen
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Keelung, Keelung 20401, Taiwan; (C.-H.C.); (A.D.-C.C.)
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Collage of Medicine, Chang Gung University, Kwei-San, Taoyuan 33305, Taiwan;
| | - Yuan-Hsun Cheng
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan;
| | - Shih-Heng Chen
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Collage of Medicine, Chang Gung University, Kwei-San, Taoyuan 33305, Taiwan;
| | - Andy Deng-Chi Chuang
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Keelung, Keelung 20401, Taiwan; (C.-H.C.); (A.D.-C.C.)
| | - Jyh-Ping Chen
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital at Linkou, Collage of Medicine, Chang Gung University, Kwei-San, Taoyuan 33305, Taiwan;
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan;
- Research Center for Food and Cosmetic Safety, Research Center for Chinese Herbal Medicine, Linkou Campus, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33305, Taiwan
- Department of Materials Engineering, Ming Chi University of Technology, Tai-Shan, New Taipei City 24301, Taiwan
- Correspondence: ; Tel.: +886-3-2118800
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Moreira J, Vale AC, Alves NM. Spin-coated freestanding films for biomedical applications. J Mater Chem B 2021; 9:3778-3799. [PMID: 33876170 DOI: 10.1039/d1tb00233c] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Spin-coating is a widely employed technique for the fabrication of thin-film coatings over large areas with smooth and homogeneous surfaces. In recent years, research has extended the scope of spin-coating by developing methods involving the interface of the substrate and the deposited solution to obtain self-supported films, also called freestanding films. Thereby, such structures have been developed for a wide range of areas. Biomedical applications of spin-coated freestanding films include wound dressings, drug delivery, and biosensing. This review will discuss the fundamental physical and chemical processes governing the conventional spin-coating as well as the techniques to obtain freestanding films. Furthermore, developments within this field with a primary focus on tissue engineering applications will be reviewed.
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Affiliation(s)
- Joana Moreira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - A Catarina Vale
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Natália M Alves
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
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9
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Takahashi T, Zhang H, Kawakami R, Yarinome K, Agetsuma M, Nabekura J, Otomo K, Okamura Y, Nemoto T. PEO-CYTOP Fluoropolymer Nanosheets as a Novel Open-Skull Window for Imaging of the Living Mouse Brain. iScience 2020; 23:101579. [PMID: 33083745 PMCID: PMC7554658 DOI: 10.1016/j.isci.2020.101579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/20/2020] [Accepted: 09/15/2020] [Indexed: 01/30/2023] Open
Abstract
In vivo two-photon deep imaging with a broad field of view has revealed functional connectivity among brain regions. Here, we developed a novel observation method that utilizes a polyethylene-oxide-coated CYTOP (PEO-CYTOP) nanosheet with a thickness of ∼130 nm that exhibited a water retention effect and a hydrophilized adhesive surface. PEO-CYTOP nanosheets firmly adhered to brain surfaces, which suppressed bleeding from superficial veins. By taking advantage of the excellent optical properties of PEO-CYTOP nanosheets, we performed in vivo deep imaging in mouse brains at high resolution. Moreover, PEO-CYTOP nanosheets enabled to prepare large cranial windows, achieving in vivo imaging of neural structure and Ca2+ elevation in a large field of view. Furthermore, the PEO-CYTOP nanosheets functioned as a sealing material, even after the removal of the dura. These results indicate that this method would be suitable for the investigation of neural functions that are composed of interactions among multiple regions. PEO-CYTOP nanosheet enables in vivo deep brain imaging in a vast field of view The 130 nm thickness and the hydrophilized surface realize the strong adhesiveness Suppressions of bleeding from the surface and inflammation in long-term are achieved The vast and transparent cranial window with natural curvature of the surface
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Affiliation(s)
- Taiga Takahashi
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Research Institute for Electronic Science, Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan.,Graduate School of Information Science and Technology Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan
| | - Hong Zhang
- Department of Applied Chemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan.,Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan
| | - Ryosuke Kawakami
- Research Institute for Electronic Science, Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan.,Graduate School of Information Science and Technology Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan.,Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine Ehime University, Shitsukawa 454, Toon, Ehime 791-0295, Japan
| | - Kenji Yarinome
- Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan
| | - Masakazu Agetsuma
- Division of Homeostatic Development, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
| | - Junichi Nabekura
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Division of Homeostatic Development, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
| | - Kohei Otomo
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Research Institute for Electronic Science, Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan.,Graduate School of Information Science and Technology Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan
| | - Yosuke Okamura
- Department of Applied Chemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan.,Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan.,Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan
| | - Tomomi Nemoto
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Research Institute for Electronic Science, Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan.,Graduate School of Information Science and Technology Hokkaido University, Hokkaido, Kita 20 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan
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10
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Athanasoulia I, Giachalis K, Korres D, Todorova N, Giannakopoulou T, Tarantili PA, Trapalis C. Study of thermomechanical, structural and antibacterial properties of poly(lactic acid) reinforced with graphene oxide nanoparticles via melt mixing. POLYM INT 2020. [DOI: 10.1002/pi.6054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ioanna‐Georgia Athanasoulia
- Polymer Technology Laboratory, School of Chemical Engineering National Technical University of Athens Athens Greece
| | - Konstantinos Giachalis
- Polymer Technology Laboratory, School of Chemical Engineering National Technical University of Athens Athens Greece
| | - Dimitrios Korres
- Polymer Technology Laboratory, School of Chemical Engineering National Technical University of Athens Athens Greece
| | - Nadia Todorova
- Institute for Nanoscience and Nanotechnology National Center for Scientific Research ‘Demokritos’ Athens Greece
| | - Tatiana Giannakopoulou
- Institute for Nanoscience and Nanotechnology National Center for Scientific Research ‘Demokritos’ Athens Greece
| | - Petroula A Tarantili
- Polymer Technology Laboratory, School of Chemical Engineering National Technical University of Athens Athens Greece
| | - Christos Trapalis
- Institute for Nanoscience and Nanotechnology National Center for Scientific Research ‘Demokritos’ Athens Greece
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11
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Decellularized liver matrix as substrates for rescue of acute hepatocytes toxicity. J Biomed Mater Res B Appl Biomater 2020; 108:1592-1602. [DOI: 10.1002/jbm.b.34506] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/16/2019] [Accepted: 09/22/2019] [Indexed: 12/11/2022]
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12
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Otomo A, Ueda MT, Fujie T, Hasebe A, Suematsu Y, Okamura Y, Takeoka S, Hadano S, Nakagawa S. Efficient differentiation and polarization of primary cultured neurons on poly(lactic acid) scaffolds with microgrooved structures. Sci Rep 2020; 10:6716. [PMID: 32317746 PMCID: PMC7174324 DOI: 10.1038/s41598-020-63537-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 03/30/2020] [Indexed: 11/08/2022] Open
Abstract
Synthetic biodegradable polymers including poly(lactic acid) (PLA) are attractive cell culture substrates because their surfaces can be micropatterned to support cell adhesion. The cell adhesion properties of a scaffold mainly depend on its surface chemical and structural features; however, it remains unclear how these characteristics affect the growth and differentiation of cultured cells or their gene expression. In this study, we fabricated two differently structured PLA nanosheets: flat and microgrooved. We assessed the growth and differentiation of mouse primary cultured cortical neurons on these two types of nanosheets after pre-coating with poly-D-lysine and vitronectin. Interestingly, prominent neurite bundles were formed along the grooves on the microgrooved nanosheets, whereas thin and randomly extended neurites were only observed on the flat nanosheets. Comparative RNA sequencing analyses revealed that the expression of genes related to postsynaptic density, dendritic shafts, and asymmetric synapses was significantly and consistently up-regulated in cells cultured on the microgrooved nanosheets when compared with those cultured on the flat nanosheets. These results indicate that microgrooved PLA nanosheets can provide a powerful means of establishing a culture system for the efficient and reproducible differentiation of neurons, which will facilitate future investigations of the molecular mechanisms underlying the pathogenesis of neurological disorders.
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Affiliation(s)
- Asako Otomo
- Micro/Nano Technology Center, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan.
- Department of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan.
| | - Mahoko Takahashi Ueda
- Micro/Nano Technology Center, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan
- Department of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan
| | - Toshinori Fujie
- School of Life Science and Technology, Tokyo Institute of Technology, B-50, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-850, Japan
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi-shi, Saitama, 332-0012, Japan
| | - Arihiro Hasebe
- Graduate School of Advanced Science and Engineering, Waseda University, TWIns, 2-2, Sinjuku-ku, Tokyo, 162-8480, Japan
| | - Yoshitaka Suematsu
- Graduate School of Advanced Science and Engineering, Waseda University, TWIns, 2-2, Sinjuku-ku, Tokyo, 162-8480, Japan
| | - Yosuke Okamura
- Micro/Nano Technology Center, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan
- Department of Applied Chemistry, School of Engineering, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan
| | - Shinji Takeoka
- Graduate School of Advanced Science and Engineering, Waseda University, TWIns, 2-2, Sinjuku-ku, Tokyo, 162-8480, Japan
- Waseda Research Institute for Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Shinji Hadano
- Department of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan
| | - So Nakagawa
- Micro/Nano Technology Center, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan.
- Department of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan.
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13
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Zhang H, Yarinome K, Kawakami R, Otomo K, Nemoto T, Okamura Y. Nanosheet wrapping-assisted coverslip-free imaging for looking deeper into a tissue at high resolution. PLoS One 2020; 15:e0227650. [PMID: 31923215 PMCID: PMC6953877 DOI: 10.1371/journal.pone.0227650] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/22/2019] [Indexed: 12/19/2022] Open
Abstract
In order to achieve deep tissue imaging, a number of optical clearing agents have been developed. However, in a conventional microscopy setup, an objective lens can only be moved until it is in contact with a coverslip, which restricts the maximum focusing depth into a cleared tissue specimen. Until now, it is still a fact that the working distance of a high magnification objective lens with a high numerical aperture is always about 100 μm. In this study, a polymer thin film (also called as nanosheet) composed of fluoropolymer with a thickness of 130 nm, less than one-thousandth that of a 170 μm thick coverslip, is employed to replace the coverslip. Owing to its excellent characteristics, such as high optical transparency, mechanical robustness, chemical resistance, and water retention ability, nanosheet is uniquely capable of providing a coverslip-free imaging. By wrapping the tissue specimen with a nanosheet, an extra distance of 170 μm for the movement of objective lens is obtained. Results show an equivalently high resolution imaging can be obtained if a homogenous refractive index between immersion liquid and mounting media is adjusted. This method will facilitate a variety of imaging tasks with off-the-shelf high magnification objectives.
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Affiliation(s)
- Hong Zhang
- Department of Applied Chemistry, School of Engineering, Tokai University, Kanagawa, Japan
- Micro/Nano Technology Center, Tokai University, Kanagawa, Japan
| | - Kenji Yarinome
- Course of Applied Science, Graduate School of Engineering, Tokai University, Kanagawa, Japan
| | - Ryosuke Kawakami
- Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
- Department of Molecular Medicine for Pathogenesis, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kohei Otomo
- Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
- Exploratory Research Center on Life and Living Systems, National Institute of Natural Sciences, Aichi, Japan
- National Institute for Physiological Sciences, Aichi, Japan
- The Graduate University for Advanced Studies (SOKENDAI), Aichi, Japan
| | - Tomomi Nemoto
- Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
- Exploratory Research Center on Life and Living Systems, National Institute of Natural Sciences, Aichi, Japan
- National Institute for Physiological Sciences, Aichi, Japan
- The Graduate University for Advanced Studies (SOKENDAI), Aichi, Japan
| | - Yosuke Okamura
- Department of Applied Chemistry, School of Engineering, Tokai University, Kanagawa, Japan
- Micro/Nano Technology Center, Tokai University, Kanagawa, Japan
- Course of Applied Science, Graduate School of Engineering, Tokai University, Kanagawa, Japan
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14
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Ruano G, Alemán C, Torras J. Study on the control of porosity in films of polythiophene derivatives. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Hatanaka T, Saito T, Fukushima T, Todo H, Sugibayashi K, Umehara S, Takeuchi T, Okamura Y. Potential of biocompatible polymeric ultra-thin films, nanosheets, as topical and transdermal drug delivery devices. Int J Pharm 2019; 565:41-49. [DOI: 10.1016/j.ijpharm.2019.04.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 03/16/2019] [Accepted: 04/19/2019] [Indexed: 01/19/2023]
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16
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Tan W, Zhang L, Shen W. Low-Cost Chemical-Responsive Adhesive Sensing Chips. ACS APPLIED MATERIALS & INTERFACES 2017; 9:42366-42371. [PMID: 29115817 DOI: 10.1021/acsami.7b14122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chemical-responsive adhesive sensing chip is a new low-cost analytical platform that uses adhesive tape loaded with indicator reagents to detect or quantify the target analytes by directly sticking the tape to the samples of interest. The chemical-responsive adhesive sensing chips can be used with paper to analyze aqueous samples; they can also be used to detect and quantify solid, particulate, and powder analytes. The colorimetric indicators become immediately visible as the contact between the functionalized adhesives and target samples is made. The chemical-responsive adhesive sensing chip expands the capability of paper-based analytical devices to analyze solid, particulate, or powder materials via one-step operation. It is also a simpler alternative way, to the covalent chemical modification of paper, to eliminate indicator leaching from the dipstick-style paper sensors. Chemical-responsive adhesive chips can display analytical results in the form of colorimetric dot patterns, symbols, and texts, enabling clear understanding of assay results by even nonprofessional users. In this work, we demonstrate the analyses of heavy metal salts in silica powder matrix, heavy metal ions in water, and bovine serum albumin in an aqueous solution. The detection is one-step, specific, sensitive, and easy-to-operate.
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Affiliation(s)
- Weirui Tan
- Department of Chemical Engineering, Monash University , Wellington Road, Clayton, VIC 3800, Australia
| | - Liyuan Zhang
- Department of Chemical Engineering, Monash University , Wellington Road, Clayton, VIC 3800, Australia
| | - Wei Shen
- Department of Chemical Engineering, Monash University , Wellington Road, Clayton, VIC 3800, Australia
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17
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Dyer M, Haldeman S, Gutierrez A, Kohut L, Sen Gupta A, Neal MD. Uncontrolled Hemorrhagic Shock Modeled via Liver Laceration in Mice with Real Time Hemodynamic Monitoring. J Vis Exp 2017. [PMID: 28570538 DOI: 10.3791/55554] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Uncontrolled hemorrhage is an important cause of preventable deaths among trauma patients. We have developed a murine model of uncontrolled hemorrhage via a liver laceration that results in consistent blood loss, hemodynamic alterations, and survival. Mice undergo a standardized resection of the left-middle lobe of the liver. They are allowed to bleed without mechanical intervention. Hemostatic agents can be administered as pre-treatment or rescue therapy depending on the interest of the investigator. During the time of hemorrhage, real-time hemodynamic monitoring via a left femoral arterial line is performed. Mice are then sacrificed, blood loss is quantified, blood is collected for further analysis, and organs are harvested for analysis of injury. Experimental design is described to allow for simultaneous testing of multiple animals. Liver hemorrhage as a model of uncontrolled hemorrhage exists in the literature, primarily in rat and porcine models. Some of these models utilize hemodynamic monitoring or quantify blood loss but lack consistency. The present model incorporates quantification of blood loss, real-time hemodynamic monitoring in a murine model that offers the advantage of using transgenic lines and a high-throughput mechanism to further investigate the pathophysiologic mechanisms in uncontrolled hemorrhage.
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Affiliation(s)
| | | | | | | | - Anirban Sen Gupta
- Department of Biomedical Engineering, Case Western Reserve University
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