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Harada T, Suzuki Y, Nakato T, Breu J, Kawamata J. Real-Time Monitoring of Adsorption-Induced Scrolling of Colloidal Inorganic Nanosheets. Langmuir 2024. [PMID: 38637013 DOI: 10.1021/acs.langmuir.4c00560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Inorganic nanotubes have attracted much attention due to their unique physicochemical properties. Nanotubes can be prepared by scrolling exfoliated nanosheets under ambient conditions. However, how the nanosheet scrolled in its colloidal state has not been experimentally visualized. In this paper, we directly observed the scrolling process of nanosheets upon adsorption of organic cations. Exfoliated flat nanosheets of niobate and clay in aqueous colloids were found to scroll by adding organic cations, such as exfoliation reagents, to the colloids. Employment of cationic stilbazolium dye enabled in situ observation of the dye adsorption and scrolling by optical microscopy based on changes in color and morphology of the nanosheets. The scrolling was promoted for nanosheets adsorbed with a stilbazolium dye with a longer alkyl chain, suggesting that the interaction between the hydrophobic parts of the dye cations is the driving force of the scrolling. This finding should encourage research on the formation of nanotubes from nanosheets and also provides important guidelines for the selection of appropriate exfoliation reagents when exfoliating nanosheets from layered crystals.
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Affiliation(s)
- Takumi Harada
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida, Yamaguchi 753-8512, Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida, Yamaguchi 753-8512, Japan
| | - Teruyuki Nakato
- Department of Applied Chemistry, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata, Kitakyushu, Fukuoka 804-8550, Japan
| | - Josef Breu
- Bavarian Polymer Institute and Department of Chemistry, University of Bayreuth, 95447 Bayreuth, Germany
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida, Yamaguchi 753-8512, Japan
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Suzuki Y, Koga S, Kitaura K, Kawamata J, Yano K, Hoshino N, Akutagawa T, Hayashi S. Noninvasive Three-dimensional Assessment of Single Molecular Crystals Using Multiphoton Microscopic Observation and Their Deformation-induced Emission Characteristics. Langmuir 2023; 39:11646-11652. [PMID: 37556485 DOI: 10.1021/acs.langmuir.3c01030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Distinguishing the luminescence contribution from the surface and bulk of a crystal is a long-standing challenge in crystal materials. Herein, three-dimensional, multiphoton, luminescence microscope imaging of the elastic molecular single crystal 1,4-bis(4-methylthien-2-yl)-2,3,5,6-tetrafluorobenzene, was conducted. Further, the luminescence contribution from the surface and bulk of the crystal was experimentally distinguished. Strong luminescence was observed only from the surface of the crystal, while the bulk did not emit strongly. Furthermore, the surface and bulk luminescence behavior responded well to the mechanical shape change of the crystal; i.e., strong luminescence was observed for the elongated side of the crystal.
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Affiliation(s)
- Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Satoshi Koga
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Kana Kitaura
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Keigo Yano
- School of Engineering Science, Kochi University of Technology, 185 Tosayamada Miyanokuchi, Kami, Kochi 782-8502, Japan
| | - Norihisa Hoshino
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8579, Japan
| | - Shotaro Hayashi
- School of Engineering Science, Kochi University of Technology, 185 Tosayamada Miyanokuchi, Kami, Kochi 782-8502, Japan
- Research Center for Molecular Design, Kochi University of Technology, 185 Tosayamada Miyanokuchi, Kami, Kochi 782-8502, Japan
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Kawamata J, Suenaga N, Oizumi N. Relationship between hematoma-like tissue on the footprint and structural outcome of arthroscopic rotator cuff repair with a transosseous technique. JSES Int 2023; 7:324-330. [PMID: 36911767 PMCID: PMC9998884 DOI: 10.1016/j.jseint.2022.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Background We have tried to create hematoma over the footprint site at the end of arthroscopic rotator cuff repair (ARCR) surgery, expecting to apply biochemical effects of the platelet-related factors. The purpose of this study was to investigate the presence of hematoma-like tissue (HLT) on postoperative magnetic resonance imaging, and to evaluate the relationship between the HLT and the structural outcomes of ARCR. Materials and methods Twenty-five patients were reviewed with a mean age at surgery of 69.8 years (range, 52-85 years). Postoperative magnetic resonance imaging was performed at 1 week, 6-8 weeks, and >6 months postoperatively. Structural outcomes for the repaired cuff and thickness of HLT were evaluated on coronal T2-weighted images. Signal intensity of HLT was evaluated on coronal T2-weighted fat-suppressed images as the ratio compared to supraspinatus tendon intensity (HLT/SSP ratio). Results Structural outcomes showed Sugaya type 1 in 12 shoulders, type 2 in 4, and type 3 in 9. HLT thickness was significantly thicker at 1 week and 6-8 weeks postoperatively in Sugaya type 1 patients than in type 3 patients (1 week; P = .014, 6-8 weeks; P < .001). HLT/SSP ratio gradually decreased (at 1 week; 1.9 ± 0.7, 6-8 weeks; 1.6 ± 0.6, >6 months; 1.2 ± 0.5), and differed significantly between >6 months and both 1 week and 6-8 weeks (P < .001 each).
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Affiliation(s)
- Jun Kawamata
- Department of Orthopaedic Surgery, Kaisei Hospital, Hokkaido, Japan
| | - Naoki Suenaga
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Sapporo, Hokkaido, Japan
| | - Naomi Oizumi
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Sapporo, Hokkaido, Japan
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Kawamata J, Suenaga N, Oizumi N, Matsumoto H, Kikuchi A, Inoue M. Differences in incidence rate and onset timing of undiagnosed finger symptom among shoulder surgeries related to complex regional pain syndrome. J Med Invest 2023; 70:415-422. [PMID: 37940526 DOI: 10.2152/jmi.70.415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
The purpose of this study was to clarify the difference in onset timing and incidence of undiagnosed finger symptom (UDFS) between various shoulder surgical procedures. In this study, UDFS symptoms included the following four symptoms in the fingers;edema, limited range-of-motion, skin color changes, and abnormal sensations. UDFS cases were defined as those presenting with at least one UDFS. In result, the incidence rate of UDFS cases was 7.1% overall (58/816 shoulders), 7.4% (32/432) in arthroscopic rotator cuff repair (ARCR), 9.0% (11/122) in open rotator cuff repair (ORCR), 1.4% (2/145) in arthroscopic subacromial decompression (ASD), 13.2% (5/38) in open reduction and internal fixation (ORIF), 11.1% (3/27) in humeral head replacement, 4.8% (1/21) in anatomical total shoulder arthroplasty, and 12.9% (4/31) in reverse total shoulder arthroplasty cases. The Rate was significantly higher with ARCR compared to ASD (p<.01). About onset timing in weeks postoperatively, the ORIF group had a statistically earlier symptom onset than the Rotator cuff repair (ARCR + ORCR) group (2.4 weeks vs. 6.0 weeks, p<.01). When classifying the onset timing into before and after the removal of the abduction pillow, the ORIF group showed a statistically higher rate of onset before brace removal than the Rotator cuff repair groups (p<.01). Differences in UDFS among shoulder surgeries were demonstrated in this study. J. Med. Invest. 70 : 415-422, August, 2023.
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Affiliation(s)
- Jun Kawamata
- Department of Orthopaedic Surgery, Kaisei Hospital, Hokkaido, Japan
| | - Naoki Suenaga
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Hokkaido , Japan
| | - Naomi Oizumi
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Hokkaido , Japan
| | - Hisashi Matsumoto
- Department of Rehabilitation, Hokushin Orthopaedic Hospital, Hokkaido, Japan
| | - Akira Kikuchi
- Department of Rehabilitation, Koga Hospital, Hokkaido, Japan
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Kawamata J, Suenaga N, Oizumi N, Yoshioka C, Miyoshi N, Goya I. Glenoid wear and its impact on clinical results after humeral head replacement using a single prosthesis in cuff tear arthropathy with more than 8 years of follow-up. J Shoulder Elbow Surg 2022; 31:2586-2594. [PMID: 35716899 DOI: 10.1016/j.jse.2022.05.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/24/2022] [Accepted: 05/09/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Glenoid wear (GW) is a long-term complication after humeral head replacement (HHR) and is one of the major reasons for revision surgery. This study aimed to evaluate GW at >8 years of follow-up after HHR in patients with cuff tear arthropathy (CTA) by use of a modified classification of GW, to examine the relationship between GW and clinical outcomes, and to identify risk factors for GW progression. METHODS This retrospective case-series study included 34 shoulders that were monitored for >8 years after HHR in patients with CTA (13 men and 21 women; mean age at surgery, 70.9 years [range, 55-82 years]). Patients were monitored for a mean of 10.3 years (range, 8.1-13.2 years). GW was classified using plain radiographs as follows: grade 0, no remarkable postoperative changes; grade 1, postoperative glenohumeral joint space narrower than preoperative glenohumeral joint space; grade 2, contact between glenoid and humeral head prosthesis; and grade 3, glenoid erosion. Grade 3 cases were further classified into the following subtypes: grade 3A, partial erosion of anterior glenoid; grade 3B, partial erosion of superior glenoid; and grade 3C, concentric erosion of glenoid. Clinical outcomes including range of motion (active flexion and active external rotation) and postoperative pain (Constant score) were compared between grade 0-2 shoulders and grade 3 shoulders, as well as between the grade 3 subtypes. Age, sex, preoperative range of motion, preoperative pain, and number of ruptured tendons were analyzed as possible risk factors for progression to grade 3. RESULTS The final GW grade was grade 0 in 3 shoulders, grade 1 in 10, grade 2 in 6, and grade 3 in 15 (grade 3A in 2, grade 3B in 6, and grade 3C in 7). The grade 3 group had lower pain scores (10.7 ± 6.2 vs. 14.2 ± 1.9, P = .044) and limited active flexion (108.2° ± 42.3° vs. 140.6° ± 26.7°, P = .041) compared with the grade 0-2 group. Subtype comparison showed that the grade 3B group had lower pain scores (7.0 ± 6.7 vs. 15.0 ± 0.0, P = .007) and limited active flexion (80.0° ± 26.2° vs. 140.8° ± 27.5°, P = .010) compared with the grade 3C group. Limited preoperative active external rotation was an individual risk factor for grade 3 GW (odds ratio, 0.93; 95% confidence interval, 0.88-0.99; P = .009). CONCLUSIONS In the long term (>8 years) after HHR with tendon transfer in patients with CTA, patients with the development of grade 3C GW ultimately achieve pain relief even without revision surgery whereas grade 3B GW is associated with persistent pain and might require revision surgery.
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Affiliation(s)
- Jun Kawamata
- Department of Orthopaedic Surgery, Kaisei Hospital, Obihiro, Japan.
| | - Naoki Suenaga
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Sapporo, Japan
| | - Naomi Oizumi
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Sapporo, Japan
| | - Chika Yoshioka
- Upper Extremity Center of Joint Replacement and Endoscopic Surgery, Hokushin Orthopaedic Hospital, Sapporo, Japan
| | - Naoki Miyoshi
- Department of Orthopaedic Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Isoya Goya
- Department of Orthopaedic Surgery, Nanbu Tokusyukai Hospital, Japan
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Matsuura H, Kawakami R, Isoe M, Hoshihara M, Minami Y, Yatsuzuka K, Tsuda T, Murakami M, Suzuki Y, Kawamata J, Imamura T, Hadano S, Watanabe S, Niko Y. NIR-II-Excitable Dye-Loaded Nanoemulsions for Two-Photon Microscopy Imaging of Capillary Blood Vessels in the Entire Hippocampal CA1 Region of Living Mice. ACS Appl Mater Interfaces 2022; 14:40481-40490. [PMID: 36063083 DOI: 10.1021/acsami.2c03299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
For in vivo two-photon fluorescence microscopy (2PM) imaging, the development of techniques that can improve the observable depth and temporal resolution is an important challenge to address biological and biomedical concerns such as vascular dynamics in the deep brain (typically the hippocampal region) of living animals. Improvements have been achieved through two approaches: an optical approach using a highly tissue-penetrating excitation laser oscillating in the second near-infrared wavelength region (NIR-II, 1100-1350 nm) and a chemical approach employing fluorescent probes with high two-photon brightness (characterized by the product of the two-photon absorption cross section, σ2, and the fluorescence quantum yield, Φ). To integrate these two approaches, we developed a fluorescent dye exhibiting a sufficiently high σ2Φ value of 68 Goeppert-Mayer units at 1100 nm. When a nanoemulsion encapsulating >1000 dye molecules per particle and a 1100 nm laser were employed for 2PM imaging, capillary blood vessels in almost the entire hippocampal CA1 region of the mouse brain (approximately 1.1-1.5 mm below the surface) were clearly visualized at a frame rate of 30 frames s-1 (averaged over eight frames, practically 3.75 frames s-1). This observable depth and frame rate are much higher than those in previous reports on 2PM imaging. Furthermore, this nanoemulsion allowed for the visualization of blood vessels at a depth of 1.8 mm, corresponding to the hippocampal dentate gyrus. These results highlight the advantage of combining bright probes with NIR-II lasers. Our probe is a promising tool for studying the vascular dynamics of living animals and related diseases.
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Affiliation(s)
- Hitomi Matsuura
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
- TOSA Innovative Human Development Programs, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
| | - Ryosuke Kawakami
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Maki Isoe
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
| | - Masaharu Hoshihara
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi-shi, Yamaguchi 753-8512, Japan
| | - Yuya Minami
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi-shi, Yamaguchi 753-8512, Japan
| | - Kazuki Yatsuzuka
- Department of Dermatology, Graduate School of Medicine, Ehime University, Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Teruko Tsuda
- Department of Dermatology, Graduate School of Medicine, Ehime University, Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Masamoto Murakami
- Department of Dermatology, Graduate School of Medicine, Ehime University, Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi-shi, Yamaguchi 753-8512, Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi-shi, Yamaguchi 753-8512, Japan
| | - Takeshi Imamura
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Shitsukawa, Toon, Ehime 791-0295, Japan
| | - Shingo Hadano
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
| | - Shigeru Watanabe
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
| | - Yosuke Niko
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi 780-8520, Japan
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Suzuki Y, Nagashita T, Ikeda A, Ishii K, Iwai T, Nakato T, Kawamata J. Formation of a Giant Anisotropically Ordered Assembled Structure of Inorganic Nanosheets through an Optically Induced Stream. Langmuir 2022; 38:6647-6652. [PMID: 35579556 DOI: 10.1021/acs.langmuir.2c00528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Formation of a desirable submillimeter-scaled assembled structure of particles in the colloid is a difficult subject in colloidal chemistry. Herein, a submillimeter-scaled ordered assembled structure consisting of highly anisotropic two-dimensional plate-like particles, niobate nanosheets, was obtained through an optical manipulation technique that was assisted by a scattering-force-induced stream. A 532 nm continuous wave laser beam with a power of 400 mW was used to illuminate a liquid crystalline niobate nanosheet colloid from the bottom side of a sample cell, inducing the stream of oriented nanosheets toward the upper side of the sample cell. As a result, a 200 μm ordered assembled structure consisting of oriented nanosheets was formed. The assembled structure was also characterized by two-dimensional anisotropy, reflecting that the highly anisotropic morphologies of each nanosheet and the shape of that structure were dependent on the polarization of incident illumination. This study has revealed a new noncontact and on-demand way to obtain submillimeter-scaled ordered anisotropic colloidal assembled structures of nanosized particles such as nanosheets, contributing to fundamental materials science and expanding the utilities of nanosheets.
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Affiliation(s)
- Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Takashi Nagashita
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Akira Ikeda
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Katsuhiro Ishii
- The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu, Hamamatsu, Shizuoka 431-1202, Japan
| | - Toshiaki Iwai
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Teruyuki Nakato
- Department of Applied Chemistry, Strategic Research Unit for Innovative Multiscale Materials, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata, Kitakyu-shu, Fukuoka 804-8550, Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512, Japan
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Hisahara S, Iwahara N, Matsushita T, Suzuki S, Matsumura A, Fujikura M, Yokokawa K, Saito T, Manabe T, Kawamata J, Horio Y, Shimohama S. SIRT1 decelerates morphological processing of oligodendrocyte cell lines and regulates the expression of cytoskeleton-related oligodendrocyte proteins. Biochem Biophys Res Commun 2021; 546:7-14. [PMID: 33556638 DOI: 10.1016/j.bbrc.2021.01.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 01/28/2021] [Indexed: 10/22/2022]
Abstract
SIRT1 is involved in the regulation of a variety of biological processes such as metabolism, stress response, autophagy and differentiation. Although progenitor cells of oligodendrocytes (OPCs) express high level of SIRT1, its function on differentiation is unknown. Because we have shown that SIRT1 plays a pivotal role in differentiation of neural precursor cells, we hypothesized that SIRT1 may also participate in the differentiation of oligodendrocytes (OLGs). We examined whether SIRT1 was expressed in two human oligodendrocyte cell lines: KG-1-C and MO 3.13 OLG. Transfection of cell lines with SIRT1-siRNA and SIRT2-siRNA promoted the extension of cellular processes. SIRT1-siRNA and SIRT2-siRNA increased acetyl-α-tubulin level, conversely, over expression of SIRTs resulted in decreased the ratio of acetyl-α-tubulin to α-tubulin. We also found knockdown of SIRT1 and SIRT2 induced overexpression of βIV-tubulin and tubulin polymerization promoting protein (TPPP) (OLG-specific cytoskeleton-related molecules) that distributed widely in cell bodies. Taken together, SIRT1 may play a role in oligodenroglial differentiation and myelinogenesis.
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Affiliation(s)
- Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan.
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Mai Fujikura
- Department of Neurology, Saiseikai Otaru Hospital, 10-1 Chikkou, Otaru, Hokkaido, 047-0008, Japan
| | - Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Kitasato University, 1-15-1 Kitasato Minami, Sagamihara, Kanagawa, 252-0375, Japan
| | - Yoshiyuki Horio
- Department of Pharmacology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16 Chuo-ku, Sapporo, Hokkaido, 060-8556, Japan
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Abe H, Kobayashi T, Hoshino N, Takeda T, Suzuki Y, Kawamata J, Akutagawa T. Dynamic structural reconstruction of (guanidinium+)2(benzene-1,4-disulfonate2−) host crystal by guest adsorption. CrystEngComm 2021. [DOI: 10.1039/d0ce01616k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Guanidinium (G+) and benzene-1,4-disulfonate (BDS2−) form a rigid electrostatic cation–anion crystal lattice, which undergoes an interesting dynamic structural reconstruction through guest adsorption–desorption processes.
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Affiliation(s)
- Haruka Abe
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579
- Japan
| | | | - Norihisa Hoshino
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579
- Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
| | - Takashi Takeda
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579
- Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation
- Yamaguchi University
- Yamaguchi 753-8512
- Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation
- Yamaguchi University
- Yamaguchi 753-8512
- Japan
| | - Tomoyuki Akutagawa
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579
- Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
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Yokokawa K, Iwahara N, Hisahara S, Emoto MC, Saito T, Suzuki H, Manabe T, Matsumura A, Matsushita T, Suzuki S, Kawamata J, Sato-Akaba H, Fujii HG, Shimohama S. Transplantation of Mesenchymal Stem Cells Improves Amyloid-β Pathology by Modifying Microglial Function and Suppressing Oxidative Stress. J Alzheimers Dis 2020; 72:867-884. [PMID: 31640102 PMCID: PMC6918908 DOI: 10.3233/jad-190817] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Mesenchymal stem cells (MSC) are increasingly being studied as a source of cell therapy for neurodegenerative diseases, and several groups have reported their beneficial effects on Alzheimer’s disease (AD). In this study using AD model mice (APdE9), we found that transplantation of MSC via the tail vein improved spatial memory in the Morris water maze test. Using electron paramagnetic resonance imaging to evaluate the in vivo redox state of the brain, we found that MSC transplantation suppressed oxidative stress in AD model mice. To elucidate how MSC treatment ameliorates oxidative stress, we focused on amyloid-β (Aβ) pathology and microglial function. MSC transplantation reduced Aβ deposition in the cortex and hippocampus. Transplantation of MSC also decreased Iba1-positive area in the cortex and reduced activated ameboid shaped microglia. On the other hand, MSC transplantation accelerated accumulation of microglia around Aβ deposits and prompted microglial Aβ uptake and clearance as shown by higher frequency of Aβ-containing microglia. MSC transplantation also increased CD14-positive microglia in vivo, which play a critical role in Aβ uptake. To confirm the effects of MSC on microglia, we co-cultured the mouse microglial cell line MG6 with MSC. Co-culture with MSC enhanced Aβ uptake by MG6 cells accompanied by upregulation of CD14 expression. Additionally, co-culture of MG6 cells with MSC induced microglial phenotype switching from M1 to M2 and suppressed production of proinflammatory cytokines. These data indicate that MSC treatment has the potential to ameliorate oxidative stress through modification of microglial functions, thereby improving Aβ pathology in AD model mice.
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Affiliation(s)
- Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan.,Department of Pharmacology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Miho C Emoto
- Department of Clinical Laboratory Science, School of Medical Technology, Health Sciences University of Hokkaido, Sapporo, Hokkaido, Japan
| | - Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
| | - Jun Kawamata
- Department of Neurology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Hideo Sato-Akaba
- Department of System Innovation, Graduate School of Engineering Science, Osaka University, Osaka, Japan
| | - Hirotada G Fujii
- Cancer Preventive Institute, Health Sciences University of Hokkaido, Ishikari, Hokkaido, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, Hokkaido, Japan
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11
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Miyanaga R, Hisahara S, Ohhashi I, Yamamoto D, Matsumura A, Suzuki S, Tanimoto K, Hirakawa M, Kawamata J, Kato J, Shimohama S. Hyperemesis-induced Wernicke-Korsakoff Syndrome due to Hypergastrinemia during Long-term Treatment with Proton Pump Inhibitors. Intern Med 2020; 59:2783-2787. [PMID: 32669503 PMCID: PMC7691029 DOI: 10.2169/internalmedicine.5168-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
We herein report a patient with Wernicke-Korsakoff syndrome (WKS) who had neither a history of alcoholism or of history of gastric surgery. A 56-year-old woman was transferred to our hospital because of the loss of consciousness and she was diagnosed to have Wernicke encephalopathy. She showed proton pump inhibitor-induced refractory hypergastrinemia with the subsequent development of hyperemesis and a vitamin B1 deficiency.
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Affiliation(s)
- Rei Miyanaga
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Ikkei Ohhashi
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Daisuke Yamamoto
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Katsumasa Tanimoto
- Department of Orthopedics, Chitose City Hospital, Japan
- Department of Orthopedics, School of Medicine, Sapporo Medical University, Japan
| | - Masahiro Hirakawa
- Department of Medical Oncology, Department of Hematology, School of Medicine, Sapporo Medical University, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
| | - Junji Kato
- Department of Medical Oncology, Department of Hematology, School of Medicine, Sapporo Medical University, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Japan
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12
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Affiliation(s)
- Shozo Onishi
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Japan
| | - Hikari Ano
- Research and Development Section, Showa Kako Corporation, 18-23 Yoshino-cho, Suita, Osaka 564-0054, Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Japan
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13
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Manabe T, Matsumura A, Yokokawa K, Saito T, Fujikura M, Iwahara N, Matsushita T, Suzuki S, Hisahara S, Kawamata J, Suzuki H, Emoto MC, Fujii HG, Shimohama S. Evaluation of Mitochondrial Oxidative Stress in the Brain of a Transgenic Mouse Model of Alzheimer's Disease by in vitro Electron Paramagnetic Resonance Spectroscopy. J Alzheimers Dis 2020; 67:1079-1087. [PMID: 30714961 DOI: 10.3233/jad-180985] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Alzheimer's disease (AD) is one of the most common neurodegenerative diseases responsible for progressive dementia. Deposition of amyloid-β (Aβ) in the brain is the most important pathophysiological hallmark of AD. In addition, recent evidence indicates that reactive oxygen species (ROS) derived from mitochondria contribute to progression of AD pathology. We thus hypothesized that Aβ accumulates and oxidative stress increases in the brain mitochondria of a transgenic mouse model of AD (APdE9). We measured the quantity of Aβ and the activity of the antioxidant enzyme superoxide dismutase (SOD) in brain mitochondrial fractions prepared from APdE9 and wild-type (WT) mice aged 6, 9, 15, and 18 months. We also quantified the age-related changes in redox status in the mitochondrial fractions obtained from both APdE9 and WT mouse brains by electron paramagnetic resonance (EPR) spectrometry using a paramagnetic nitroxide "Mito-Tempo" [(2-(2,2,6,6-Tetramethylpiperidin-1-oxyl-4-ylamino)-2-oxoethyl) triphenylphosphonium chloride monohydrate] as a mitochondria-targeted redox-sensitive probe. In APdE9 mice, Aβ accumulated in brain mitochondria earlier than in the non-mitochondrial fraction of the brain. Furthermore, increased oxidative stress was demonstrated in brain mitochondria of APdE9 mice by in vitro SOD assay as well as EPR spectroscopy. EPR combined with a mitochondria-targeted redox-sensitive nitroxide probe is a potentially powerful tool to elucidate the etiology of AD and facilitate the development of new therapeutic strategies for AD.
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Affiliation(s)
- Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Mai Fujikura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Miho C Emoto
- Health Sciences University of Hokkaido, Sapporo, Japan
| | | | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
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14
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Ito H, Sakai H, Suzuki Y, Kawamata J, Hasobe T. Systematic Control of Structural and Photophysical Properties of π‐Extended Mono‐ and Bis‐BODIPY Derivatives. Chemistry 2019; 26:316-325. [DOI: 10.1002/chem.201904282] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/05/2019] [Indexed: 01/31/2023]
Affiliation(s)
- Hiroaki Ito
- Department of Chemistry Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Yokohama Kanagawa 223-8522 Japan
| | - Hayato Sakai
- Department of Chemistry Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Yokohama Kanagawa 223-8522 Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation Yamaguchi University 1677-1 Yoshida Yamaguchi 753-8512 Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation Yamaguchi University 1677-1 Yoshida Yamaguchi 753-8512 Japan
| | - Taku Hasobe
- Department of Chemistry Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Yokohama Kanagawa 223-8522 Japan
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15
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Saito T, Hisahara S, Iwahara N, Emoto MC, Yokokawa K, Suzuki H, Manabe T, Matsumura A, Suzuki S, Matsushita T, Kawamata J, Sato-Akaba H, Fujii HG, Shimohama S. Early administration of galantamine from preplaque phase suppresses oxidative stress and improves cognitive behavior in APPswe/PS1dE9 mouse model of Alzheimer's disease. Free Radic Biol Med 2019; 145:20-32. [PMID: 31536772 DOI: 10.1016/j.freeradbiomed.2019.09.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/12/2019] [Accepted: 09/15/2019] [Indexed: 11/26/2022]
Abstract
Alzheimer's disease (AD) is a common neurodegenerative disease that progressively impairs memory and cognition. Deposition of amyloid-β (Aβ) peptides is the most important pathophysiological hallmark of AD. Oxidative stress induced by generation of reactive oxygen species (ROS) is a prominent phenomenon in AD and known to occur early in the course of AD. Several reports suggest a relationship between change in redox status and AD pathology including progressive Aβ deposition, glial cell activation, and inflammation. Galantamine is an acetylcholinesterase inhibitor and has been reported to have an oxidative stress inhibitory function. In the present study, galantamine was administered orally to AD model mice from before the appearance of Aβ plaques (preplaque phase), and in vivo change in redox status of the brain was measured using electron paramagnetic resonance (EPR) imaging. Administration of galantamine from the preplaque phase ameliorated memory decline in Morris water maze test and novel object recognition test. Monitoring of the redox status of the brain using EPR imaging showed that galantamine treatment improved the unbalanced redox state. Additionally, galantamine administration enhanced microglial function to promote Aβ clearance, reducing the Aβ-positive area in the cortex and amount of insoluble Aβ in the brain. In contrast, galantamine treatment from the preplaque phase suppressed the production of proinflammatory cytokines through neurotoxic microglial activity. Therefore, galantamine administration from the preplaque phase may have the potential of clinical application for the prevention of AD. In addition, our results demonstrate the usefulness of EPR imaging for speedy and quantitative evaluation of the efficacy of disease-modifying drugs for AD.
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Affiliation(s)
- Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan; Department of Pharmacology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Miho C Emoto
- Department of Clinical Laboratory Science, School of Medical Technology, Health Sciences University of Hokkaido, Sapporo, Hokkaido, 002-8072, Japan
| | - Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan
| | - Jun Kawamata
- Department of Neurology, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan
| | - Hideo Sato-Akaba
- Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Hirotada G Fujii
- Cancer Preventive Institute, Health Sciences University of Hokkaido, Ishikari, Hokkaido, 061-0293, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, 060-8556, Japan.
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16
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Morita H, Tsunashima R, Nishihara S, Inoue K, Omura Y, Suzuki Y, Kawamata J, Hoshino N, Akutagawa T. Ferroelectric Behavior of a Hexamethylenetetramine‐Based Molecular Perovskite Structure. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905087] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hagino Morita
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Ryo Tsunashima
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
- Chemistry CourseFaculty of ScienceYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Sadafumi Nishihara
- Graduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Katsuya Inoue
- Graduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Yuriko Omura
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)Tohoku University Sendai 980-8577 Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)Tohoku University Sendai 980-8577 Japan
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17
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Morita H, Tsunashima R, Nishihara S, Inoue K, Omura Y, Suzuki Y, Kawamata J, Hoshino N, Akutagawa T. Ferroelectric Behavior of a Hexamethylenetetramine‐Based Molecular Perovskite Structure. Angew Chem Int Ed Engl 2019; 58:9184-9187. [DOI: 10.1002/anie.201905087] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Hagino Morita
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Ryo Tsunashima
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
- Chemistry CourseFaculty of ScienceYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Sadafumi Nishihara
- Graduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Katsuya Inoue
- Graduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Yuriko Omura
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yoshida 1677-1 Yamaguchi 753-8512 Japan
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)Tohoku University Sendai 980-8577 Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)Tohoku University Sendai 980-8577 Japan
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18
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Nakato T, Higashi Y, Ishitobi W, Nagashita T, Tominaga M, Suzuki Y, Iwai T, Kawamata J. Microscope Observation of Morphology of Colloidally Dispersed Niobate Nanosheets Combined with Optical Trapping. Langmuir 2019; 35:5568-5573. [PMID: 30942592 DOI: 10.1021/acs.langmuir.9b00356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although inorganic nanosheets prepared by exfoliation (delamination) of layered crystals have attracted great attention as 2D nanoparticles, in situ real space observations of exfoliated nanosheets in the colloidally dispersed state have not been conducted. In the present study, colloidally dispersed inorganic nanosheets prepared by exfoliation of layered niobate are directly observed with bright-field optical microscopy, which detects large nanosheets with lateral length larger than several micrometers. The observed nanosheets are not strictly flat but rounded, undulated, or folded in many cases. Optical trapping of nanosheets by laser radiation pressure has clarified their uneven cross-sectional shapes. Their morphology is retained under the relation between Brownian motion and optical trapping.
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Affiliation(s)
| | - Yuki Higashi
- Graduate School of Sciences and Technology for Innovation , Yamaguchi University , 1677-1 Yoshida , Yamaguchi, Yamaguchi 753-8512 , Japan
| | | | - Takashi Nagashita
- Graduate School of Sciences and Technology for Innovation , Yamaguchi University , 1677-1 Yoshida , Yamaguchi, Yamaguchi 753-8512 , Japan
| | - Makoto Tominaga
- Graduate School of Sciences and Technology for Innovation , Yamaguchi University , 1677-1 Yoshida , Yamaguchi, Yamaguchi 753-8512 , Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation , Yamaguchi University , 1677-1 Yoshida , Yamaguchi, Yamaguchi 753-8512 , Japan
| | - Toshiaki Iwai
- Graduate School of Bio-Applications and Systems Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Naka-cho , Koganei , Tokyo 184-8588 , Japan
| | - Jun Kawamata
- Graduate School of Sciences and Technology for Innovation , Yamaguchi University , 1677-1 Yoshida , Yamaguchi, Yamaguchi 753-8512 , Japan
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19
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Fujikura M, Iwahara N, Hisahara S, Kawamata J, Matsumura A, Yokokawa K, Saito T, Manabe T, Matsushita T, Suzuki S, Shimohama S. CD14 and Toll-Like Receptor 4 Promote Fibrillar Aβ42 Uptake by Microglia Through A Clathrin-Mediated Pathway. J Alzheimers Dis 2019; 68:323-337. [DOI: 10.3233/jad-180904] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mai Fujikura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
- Department of Pharmacology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
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20
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Toyama Y, Kawamata J, Shimohama S. [Two cases of photosensitive seizure induced by barcode readers with red flashing lights]. Rinsho Shinkeigaku 2018; 58:626-630. [PMID: 30270339 DOI: 10.5692/clinicalneurol.cn-001185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The patient in Case 1 was a 25-year-old female nurse. While she was working at a day-care, she fell down shortly after using a barcode reader. This was followed by a tonic-clonic seizure. The seizure spontaneously stopped after approximately 5 minutes. However, consciousness impairment continued for about 30 minutes. The patient in Case 2 was a 30-year-old female nurse. During the night shift at her workplace, she found it impossible to stand up after staring at the red flashing lights from a barcode reader. The patient was also disoriented, as indicated by her inability to recall her colleague's name. The patient's condition gradually improved and she became fully conscious soon after the episode. We believe that the barcode reader led to photosensitivity in both cases. Barcode readers that emit red flashing lights are thought to have a high potential for triggering photosensitivity. A person is highly likely to display photosensitivity while using the device in a hospital ward. Therefore, special attention is required to avoid photosensitive seizures induced by barcode readers with red flashing lights.
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Affiliation(s)
- Yuichiro Toyama
- Department of Neurology, Sapporo Medical University School of Medicine
| | - Jun Kawamata
- Department of Neurology, Sapporo Medical University School of Medicine
| | - Shun Shimohama
- Department of Neurology, Sapporo Medical University School of Medicine
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21
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Suzuki Y, Onishi S, Matsumoto K, Takiyama T, Kameyama T, Torimoto T, Kawamata J. Two-photon absorption spectrum of solid solution nanocrystals of ZnS-AgInS2. CHEM LETT 2018. [DOI: 10.1246/cl.180718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yasutaka Suzuki
- Graduate School of Science and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8512
- Faculty of Science, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8512
| | - Shozo Onishi
- Graduate School of Science and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8512
| | - Kazuya Matsumoto
- Faculty of Science, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8512
| | - Takayuki Takiyama
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603
| | - Tatsuya Kameyama
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603
| | - Tsukasa Torimoto
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603
| | - Jun Kawamata
- Graduate School of Science and Technology for Innovation, Yamaguchi University, 1677-1, Yoshida, Yamaguchi 753-8512
- Faculty of Science, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, 753-8512
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22
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Takeda T, Noro SI, Nakamura T, Suzuki Y, Kawamata J, Akutagawa T. Selective MeCN/EtCN sorption and preferential inclusion of substituted benzenes in a cage structure with arylsulfonamide-armed anthraquinones. CrystEngComm 2018. [DOI: 10.1039/c7ce01752a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The titled compounds 1,4 formed low-dimensional crystal structures with selective sorption/inclusion properties.
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Affiliation(s)
- Takashi Takeda
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai
- Japan
| | - Shin-ichiro Noro
- Research Institute of Electronic Science
- Hokkaido University
- Sapporo
- Japan
| | | | - Yasutaka Suzuki
- Graduate School of Medicine
- Yamaguchi University
- Yamaguchi
- Japan
| | - Jun Kawamata
- Graduate School of Medicine
- Yamaguchi University
- Yamaguchi
- Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai
- Japan
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23
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Seki H, Onishi S, Asamura N, Suzuki Y, Kawamata J, Kaneno D, Hadano S, Watanabe S, Niko Y. Bright and two-photon active red fluorescent dyes that selectively move back and forth between the mitochondria and nucleus upon changing the mitochondrial membrane potential. J Mater Chem B 2018; 6:7396-7401. [DOI: 10.1039/c8tb02415d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pyrene-based two-photon active and bright red emitters that localize between the mitochondria and nucleus in response to changes in the mitochondrial membrane potential.
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Affiliation(s)
- Hitomi Seki
- Research and Education Faculty
- Multidisciplinary Science Cluster
- Interdisciplinary Science Unit
- Kochi University
- Kochi
| | - Shozo Onishi
- Graduate School of Medicine
- Yamaguchi University
- Yoshida
- Japan
| | - Naoya Asamura
- Graduate School of Medicine
- Yamaguchi University
- Yoshida
- Japan
| | | | - Jun Kawamata
- Graduate School of Medicine
- Yamaguchi University
- Yoshida
- Japan
| | - Daisuke Kaneno
- Department of Applied Science
- Graduate School of Integrated Arts and Sciences
- Kochi University
- Nankoku City
- Japan
| | - Shingo Hadano
- Research and Education Faculty
- Multidisciplinary Science Cluster
- Interdisciplinary Science Unit
- Kochi University
- Kochi
| | - Shigeru Watanabe
- Research and Education Faculty
- Multidisciplinary Science Cluster
- Interdisciplinary Science Unit
- Kochi University
- Kochi
| | - Yosuke Niko
- Research and Education Faculty
- Multidisciplinary Science Cluster
- Interdisciplinary Science Unit
- Kochi University
- Kochi
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24
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Yamamoto D, Imai T, Tsuda E, Hozuki T, Yamauchi R, Hisahara S, Kawamata J, Shimohama S. Effect of local cooling on excitation-contraction coupling in myasthenic muscle: Another mechanism of ice-pack test in myasthenia gravis. Clin Neurophysiol 2017; 128:2309-2317. [DOI: 10.1016/j.clinph.2017.08.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 08/17/2017] [Accepted: 08/28/2017] [Indexed: 10/18/2022]
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25
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Suzuki S, Suzuki H, Yokokawa K, Saitou T, Fujikura M, Manabe T, Iwahara N, Matsumura A, Matsushita T, Hisahara S, Kawamata J, Shimohama S. The optimal preconditioning for bone marrow transplantation to establish 6-OHDA-lesioned GFP bone marrow chimeric PD model rat. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Fujikura M, Iwahara N, Yokokawa K, Saito T, Manabe T, Matsushita T, Matsumura A, Suzuki S, Hisahara S, Kawamata J, Shimohama S. Stimulation of nicotinic acetylcholine receptor suppresses expression of CD14 in microglia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Hisahara S, Iwahara N, Manabe T, Fujikura M, Saito T, Yokokawa K, Matsumura A, Suzuki S, Kawamata J, Shimohama S. Deacetylase SIRTs regulate differentiation of oligodendrocyte and modulate distribution of oligodendrocyte-specific cytoskeleton-related molecules. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Manabe T, Yokokawa K, Saito T, Fujikura M, Iwahara N, Suzuki H, Matsumura A, Suzuki S, Matsushita T, Hisahara S, Kawamata J, Shimohama S. Early Aβ accumulation in the mitochondria produces oxidative stress and induces neurodegeneration in APdE9 mice. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Takeda T, Suzuki Y, Kawamata J, Noro SI, Nakamura T, Akutagawa T. The emergent intramolecular hydrogen bonding effect on the electronic structures of organic electron acceptors. Phys Chem Chem Phys 2017; 19:23905-23909. [PMID: 28825426 DOI: 10.1039/c7cp04402j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new strategy for controlling the electron-accepting ability of an anthraquinone (AQ)-based π-molecular system is proposed to take advantage of intramolecular hydrogen bonding interactions. The electron-accepting properties of AQ are enhanced by the introduction of bulky arylsulfonamide groups into AQ derivatives due to the formation of effective intramolecular N-HO hydrogen bonding interaction and stabilization of the anion radical state even in solution.
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Affiliation(s)
- Takashi Takeda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan.
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30
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Iwahara N, Hisahara S, Kawamata J, Matsumura A, Yokokawa K, Saito T, Fujikura M, Manabe T, Suzuki H, Matsushita T, Suzuki S, Shimohama S. Role of Suppressor of Cytokine Signaling 3 (SOCS3) in Altering Activated Microglia Phenotype in APPswe/PS1dE9 Mice. J Alzheimers Dis 2017; 55:1235-1247. [PMID: 27814300 DOI: 10.3233/jad-160887] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In response to changes of the central nervous system environment, microglia are capable of acquiring diverse phenotypes for cytotoxic or immune regulation and resolution of injury. Alzheimer's disease (AD) pathology also induces several microglial activations, resulting in production of pro-inflammatory cytokines and reactive oxygen species or clearance of amyloid-β (Aβ) through phagocytosis. We previously demonstrated that microglial activation and increase in oxidative stress started from the middle age in APPswe/PS1dE9 mice, and hypothesized that M1 activation occurs in middle-aged AD mice by Aβ stimulation. In the present study, we analyzed in vivo expressions of pro-inflammatory cytokines (M1 microglial markers), M2 microglial markers, and suppressor of cytokine signaling (SOCS) family, and examined the microglial phenotypic profile in APPswe/PS1dE9 mice. Then we compared the in vitro gene expression patterns of Aβ- and lipopolysaccharide (LPS)-stimulated primary-cultured microglia. Microglia in APPswe/PS1dE9 mice exhibited an M1-like phenotype, expressing tumor necrosis factor α (TNFα) but not interleukin 6 (IL6). Aβ-stimulated primary-cultured microglia also expressed TNFα but not IL6, whereas LPS-stimulated primary-cultured microglia expressed both pro-inflammatory cytokines. Furthermore, both microglia in APPswe/PS1dE9 mice and Aβ-stimulated primary-cultured microglia expressed SOCS3. Reduction of SOCS3 expression in Aβ-challenged primary-cultured microglia resulted in upregulation of IL6 expression. Our findings indicate that SOCS3 suppresses complete polarization to M1 phenotype through blocking IL6 production, and Aβ-challenged primary-cultured microglia replicate the in vivo gene expression pattern of microglia in APPswe/PS1dE9 mice. Aβ may induce the M1-like phenotype through blocking of IL6 by SOCS3.
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Affiliation(s)
- Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Mai Fujikura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan.,Department of Pharmacology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Hokkaido, Japan
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31
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Wada S, Ito N, Watanabe M, Kakizaki T, Natsuhori M, Kawamata J, Urayama Y. Whole-Body Counter Evaluation of Internal Radioactive Cesium in Dogs and Cats Exposed to the Fukushima Nuclear Disaster. PLoS One 2017; 12:e0169365. [PMID: 28099476 PMCID: PMC5242420 DOI: 10.1371/journal.pone.0169365] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 12/15/2016] [Indexed: 11/19/2022] Open
Abstract
As a result of the 2011 nuclear incident that occurred at the Fukushima Nuclear Power Plant, a large number of abandoned dogs and cats were left within the disaster zone. A small number of these animals were rescued and cared for at shelters. Prior to the dispersal of these animals to their owners or fosterers, we evaluated the degree of internal radiocesium contamination using a specially designed whole-body counter. We conducted 863 non-invasive measurements of gamma rays due to internal radioactive cesium for 68 dogs and 120 cats at one shelter. After plotting graphs of 137Cs density we generated exponential functions of decay from seven dogs and six cats. From the regression formulae, we were able to determine the biological half-lives as 38.2 days for dogs and 30.8 days for cats. We found that in dogs there was a correlation between the biological half-life of radioactive cesium and age. Using our data, we estimated whole-body densities for each cat and dog at the time when they were rescued. We found that there were deviations in the data distributions among the different species, likely due to the timing of rescue, or living habits prior to rescue. A significant correlation was found when extracted feline reproductive organs were analyzed; the coefficients for the estimation of whole-body densities were approximately 7-fold higher than those based on the extracted feline reproductive organs. This may be due to the fact that majority of the radioactive cesium accumulates within muscular tissue with less distribution in other organs. It is possible to plan the appropriate management period in an animal shelter based on the use of the biological half-life of radioactive cesium calculated in this study. We believe that the correlations we uncovered in this work would be of great use for the management of companion animals in the event of a future nuclear accident.
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Affiliation(s)
- Seiichi Wada
- Laboratory of Veterinary Radiology and Radiation Biology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Nobuhiko Ito
- Laboratory of Veterinary Radiology and Radiation Biology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | | | - Takehiko Kakizaki
- Laboratory of Veterinary Radiology and Radiation Biology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Masahiro Natsuhori
- Laboratory of Veterinary Radiology and Radiation Biology, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Jun Kawamata
- Fukushima Veterinary Medical Association, Fukushima, Japan
| | - Yoshio Urayama
- Fukushima Headquarters for Animal Rescue, Fukushima, Fukushima, Japan
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32
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Fumoto N, Matsumoto R, Kawamata J, Koyasu S, Kondo T, Kitamura A, Koshiba Y, Kinoshita M, Kawasaki J, Yamashita H, Takahashi R, Ikeda A. Novel
LGI
1
mutation in a Japanese autosomal dominant lateral temporal lobe epilepsy family. ACTA ACUST UNITED AC 2016. [DOI: 10.1111/ncn3.12105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Naohiro Fumoto
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
- Department of Neurology Minami‐Okayama Medical Center HayashimaJapan
| | - Riki Matsumoto
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
| | - Jun Kawamata
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
- Department of Neurology Sapporo Medical University SapporoJapan
- Department of Diagnostic Imaging and Nuclear Medicine Kyoto University Graduate School of Medicine KyotoJapan
| | - Sho Koyasu
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
- Department of Diagnostic Imaging and Nuclear Medicine Kyoto University Graduate School of Medicine KyotoJapan
- Department of Cell Growth and Differentiation Laboratory of Stem Cell Medicine Kyoto University KyotoJapan
| | - Takayuki Kondo
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
- Department of Cell Growth and Differentiation Laboratory of Stem Cell Medicine Kyoto University KyotoJapan
- Department of Neurology Kanazawa Medical University KanazawaJapan
| | - Akihiro Kitamura
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
- Department of Neurology Kanazawa Medical University KanazawaJapan
- Department of Neurology Kyoto City Hospital KyotoJapan
| | - Yasushi Koshiba
- Department of Neurology Kyoto City Hospital KyotoJapan
- Department of Biological Repair Field of Clinical Application Institute for Frontier Medical Sciences Kyoto University KyotoJapan
- Department of Neurology Utano National Hospital Kyoto Japan
| | - Masako Kinoshita
- Department of Neurology Utano National Hospital Kyoto Japan
- Kawasaki Clinic Kyoto Japan
| | - Jun Kawasaki
- Kawasaki Clinic Kyoto Japan
- Department of Epilepsy Movement Disorders and Physiology Kyoto University Graduate School ofMedicine Kyoto Japan
| | - Hirofumi Yamashita
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
| | - Ryosuke Takahashi
- Department of Neurology Kyoto University Graduate School of Medicine KyotoJapan
| | - Akio Ikeda
- Department of Neurology Sapporo Medical University SapporoJapan
- Department of Epilepsy Movement Disorders and Physiology Kyoto University Graduate School ofMedicine Kyoto Japan
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33
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Koide T, Takesue M, Murafuji T, Satomi K, Suzuki Y, Kawamata J, Terai K, Suzuki M, Yamada H, Shiota Y, Yoshizawa K, Tani F. An Azulene‐Fused Tetracene Diimide with a Small HOMO–LUMO Gap. Chempluschem 2016; 82:1010-1014. [DOI: 10.1002/cplu.201600356] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Taro Koide
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Moritaka Takesue
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Toshihiro Murafuji
- Graduate School of Medicine Yamaguchi University Yamaguchi 753-8512 Japan
| | - Koichiro Satomi
- Graduate School of Medicine Yamaguchi University Yamaguchi 753-8512 Japan
| | - Yasutaka Suzuki
- Graduate School of Medicine Yamaguchi University Yamaguchi 753-8512 Japan
| | - Jun Kawamata
- Graduate School of Medicine Yamaguchi University Yamaguchi 753-8512 Japan
| | - Kengo Terai
- Graduate School of Materials Science Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Mitsuharu Suzuki
- Graduate School of Materials Science Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Hiroko Yamada
- Graduate School of Materials Science Nara Institute of Science and Technology (NAIST) 8916-5 Takayama-cho, Ikoma Nara 630-0192 Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Fumito Tani
- Institute for Materials Chemistry and Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
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34
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Hisahara S, Yamada M, Matsuura Y, Tsuda E, Akiyama Y, Saitoh M, Kawamata J, Mikuni N, Shimohama S. ANCA-negative granulomatosis with polyangiitis presenting with orbital apex syndrome and recurrent pachymeningitis: A case report. J Neurol Sci 2016; 368:175-7. [PMID: 27538627 DOI: 10.1016/j.jns.2016.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 07/08/2016] [Indexed: 11/27/2022]
Affiliation(s)
- Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Minoru Yamada
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Yousuke Matsuura
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Emiko Tsuda
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Yukinori Akiyama
- Department of Neurosurgery, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Masaki Saitoh
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Nobuhiro Mikuni
- Department of Neurosurgery, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1, West 17, Chuo-ku, Sapporo 060-8543, Japan.
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35
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Suzuki Y, Moritomo H, Fuji A, Satomi K, Kawamata J, Yamamoto M, Hasegawa Y. Three-photon-induced Luminescence of Europium Acetylacetonate-type Complexes. CHEM LETT 2016. [DOI: 10.1246/cl.160126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Akinari Fuji
- Graduate School of Medicine, Yamaguchi University
| | | | - Jun Kawamata
- Graduate School of Medicine, Yamaguchi University
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36
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Takahashi K, Hoshino N, Takeda T, Satomi K, Suzuki Y, Noro SI, Nakamura T, Kawamata J, Akutagawa T. The crystal design of polar one-dimensional hydrogen-bonded copper coordination complexes. Dalton Trans 2016; 45:3398-406. [PMID: 26791265 DOI: 10.1039/c5dt04865f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polar crystals exhibiting second-order harmonic generation (SHG) were designed by adjusting the intermolecular interactions of mononuclear Cu(ii) complexes in which one H2O, two pyridines (py), and two p-substituted benzoate (p-RBA) ligands (R = F, Cl, Br, I, CH3, and OCH3) were coordinated to a Cu(ii) ion, forming a penta-coordinated asymmetric [Cu(ii)(p-RBA)2(py)2(H2O)] mononuclear structure with a permanent dipole moment along the direction of the Cu-OH2 coordination axis. Each asymmetric [Cu(ii)(p-RBA)2(py)2(H2O)] complex formed a polar one-dimensional hydrogen-bonded chain, [Cu(ii)(p-RBA)2(py)2(H2O)]∞, between the non-coordinated carboxylate oxygen atom of the p-RBA ligand and the hydrogen atom of the H2O molecule. The formation of a polar crystal depended on the arrangement of polar hydrogen-bonded chains; the parallel arrangement of each polar chain resulted in a polar crystal. The chemical design of the R group in the p-RBA ligand enabled tuning of the magnitude of the interchain interactions and crystal polarity; polar crystals were obtained using p-RBA ligands with R = Cl, Br, I, and OCH3. In contrast, apolar crystals were grown from complexes containing p-RBA ligands with R = F and CH3. In all crystals, a polar two-dimensional (2D) layer constructed from the parallel polar [Cu(ii)(p-RBA)2(py)2(H2O)]∞ chain arrangement was formed based on weak van der Waals C-H...(-)O- interactions between the hydrogen atom of py and the carboxylate oxygen atom of the p-RBA ligand. Weak interlayer halogen (X)...π and multipoint C-H...π interactions played important roles in forming parallel arrangements of polar 2D layers and polar crystals, but there were no effective intermolecular interactions between the polar 2D layers in apolar [Cu(ii)(p-FBA)2(py)2(H2O)] and [Cu(ii)(p-CH3BA)2(py)2(H2O)] crystals. The magnitudes of the interlayer interactions in the polar crystals were larger than those in the apolar ones because of the effective intermolecular interactions. The SHG intensities of the four polar crystals were approximately 0.7 times larger than that of sucrose.
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Affiliation(s)
- Kiyonori Takahashi
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
| | - Norihisa Hoshino
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan. and Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Takashi Takeda
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan. and Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Koichiro Satomi
- Graduate School of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Yasutaka Suzuki
- Graduate School of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Shin-ichiro Noro
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan
| | - Takayoshi Nakamura
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan
| | - Jun Kawamata
- Graduate School of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Tomoyuki Akutagawa
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan. and Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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37
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Yamamoto D, Imai T, Tsuda E, Hozuki T, Yamauchi R, Hisahara S, Kawamata J, Shimohama S. Impaired post-tetanic potentiation of muscle twitch in myasthenia gravis. Clin Neurophysiol 2015; 127:1689-1693. [PMID: 26547355 DOI: 10.1016/j.clinph.2015.10.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 10/06/2015] [Accepted: 10/10/2015] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate post-tetanic potentiation of muscle twitch in myasthenia gravis (MG). METHODS Post-tetanic potentiation was evaluated by recording the compound muscle action potential (CMAP) of abductor pollicis brevis and movement-related potential (MRP) of the thumb using an accelerometer after tetanic stimulation of the median nerve at the wrist. After baseline recording, tetanic stimulation was delivered to the median nerve at a frequency of 10 Hz for 10s. The CMAP and MRP were successively recorded at baseline and at 5, 10, 30, 60, 90 and 120 s after tetanic stimulation. The chronological changes of CMAPs and MRPs were recorded bilaterally in 11 patients with MG, 9 patients with myopathies (disease controls), and 25 healthy control subjects. RESULTS Maximal acceleration of MRP was significantly elevated during 10s after tetanic stimulation without any CMAP changes in all groups. However, statistical analysis detected a significant decrease in post-tetanic potentiation of maximal acceleration of MRP in MG patients only compared to healthy controls, but not in myopathy patients, which may imply impairment of excitation-contraction coupling in MG. CONCLUSIONS Post-tetanic potentiation of muscle twitch is significantly diminished in MG, suggesting impaired excitation-contraction coupling. SIGNIFICANCE Measurement of post-tetanic potentiation using an accelerometer is a simple and sensitive method to detect impairment of excitation-contraction coupling in MG.
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Affiliation(s)
- Daisuke Yamamoto
- Department of Neurology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tomihiro Imai
- Department of Occupational Therapy, Sapporo Medical University School of Health Sciences, Sapporo, Japan.
| | - Emiko Tsuda
- Department of Neurology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | | | - Rika Yamauchi
- Department of Neurology, Sunagawa City Medical Center, Sunagawa, Japan
| | - Shin Hisahara
- Department of Neurology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Jun Kawamata
- Department of Neurology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Shun Shimohama
- Department of Neurology, Sapporo Medical University School of Medicine, Sapporo, Japan
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Matsumura A, Emoto MC, Suzuki S, Iwahara N, Hisahara S, Kawamata J, Suzuki H, Yamauchi A, Sato-Akaba H, Fujii HG, Shimohama S. Evaluation of oxidative stress in the brain of a transgenic mouse model of Alzheimer disease by in vivo electron paramagnetic resonance imaging. Free Radic Biol Med 2015; 85:165-73. [PMID: 25912481 DOI: 10.1016/j.freeradbiomed.2015.04.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/04/2015] [Accepted: 04/12/2015] [Indexed: 10/23/2022]
Abstract
Alzheimer disease (AD) is a neurodegenerative disease clinically characterized by progressive cognitive dysfunction. Deposition of amyloid-β (Aβ) peptides is the most important pathophysiological hallmark of AD. Oxidative stress induced by reactive oxygen species is prominent in AD, and several reports suggest the relationship between a change in redox status and AD pathology containing progressive Aβ deposition, the activation of glial cells, and mitochondrial dysfunction. Therefore, we performed immunohistochemical analysis using a transgenic mouse model of AD (APdE9) and evaluated the activity of superoxide dismutase in brain tissue homogenates of APdE9 mice in vitro. Together with those analyses, in vivo changes in redox status with age in both wild-type (WT) and APdE9 mouse brains were measured noninvasively by three-dimensional electron paramagnetic resonance (EPR) imaging using nitroxide (3-methoxycarbonyl-2,2,5,5-tetramethylpyrrolidine-1-yloxy) as a redox-sensitive probe. Both methods found similar changes in redox status with age, and in particular a significant change in redox status in the hippocampus was observed noninvasively by EPR imaging between APdE9 mice and age-matched WT mice from 9 to 18 months of age. EPR imaging clearly visualized the accelerated change in redox status of APdE9 mouse brain compared with WT. The evaluation of the redox status in the brain of AD model rodents by EPR imaging should be useful for diagnostic study of AD.
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Affiliation(s)
- Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Miho C Emoto
- Center for Medical Education, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Ayano Yamauchi
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Hideo Sato-Akaba
- Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Hirotada G Fujii
- Center for Medical Education, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo 060-8543, Japan.
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Kawamata J, Yamanouchi T. Protection against biohazards in animal laboratories. Bibl Haematol 2015:779-82. [PMID: 1174317 DOI: 10.1159/000397603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An outline of the animal facilities known as the "Quarters for Experimentally Infected Animals" of the Research Institute for Microbial Diseases, Osaka University, is presented as one example of the approaches used for protecting against biohazards in animal laboratories. The quarters are contained in a 2-story building which is in the form of small cubicles for housing the experimentally infected animals. Each cubicle is equipped with specially designed cabinet compartments in which the animal cages are placed. The anterior surface of the compartments consists of an outward inclining door. Vigorous air-mixing between compartments and the interiors of the cubicles can be avoided by this arrangement. The air for ventilation is sucked through a gap between the edge of the door and the wall of each compartment and the collected air is finally filtered through Cambridge "Aerosolve" and "Absolute" filters before being exhausted into the atmosphere. In the central corridor connecting each cubicle the air pressure is maintained at a higher level than that in the cubicle but lower than that outdoors. Thus, the air stream is always kept flowing from the outside to the inside of the cubicle and from the inside of the cubicle to the compartments but never vice versa. Each cubicle is equipped with an individual, pass-through autoclave. All soiled materials are sterilized before being removed from the cubicle. The drained water from each cubicle is chlorinated in a tank by chloride of lime. In these facilities experimentally infected animals can be handled with little danger of accidental contamination of personnel, other animals, or the external environment. The authors emphasize the importance of complete adherence to the rules in such animal facilities.
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Iwahara N, Hisahara S, Hayashi T, Kawamata J, Shimohama S. A novel lamin A/C gene mutation causing spinal muscular atrophy phenotype with cardiac involvement: report of one case. BMC Neurol 2015; 15:13. [PMID: 25886484 PMCID: PMC4342086 DOI: 10.1186/s12883-015-0269-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 02/11/2015] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Mutations of the lamin A/C gene have been associated with several diseases such as Emery-Dreifuss muscular dystrophy, dilated cardiomyopathy and Charcot-Marie-Tooth disease, referred to as laminopathies. Only one report of spinal muscular atrophy and cardiomyopathy phenotype with lamin A/C gene mutations has been published. The concept that lamin A/C gene mutations cause spinal muscular atrophy has not been established. CASE PRESENTATION We report a man aged 65 years who presented with amyotrophy of lower limbs, arrhythmia and cardiac hypofunction. He showed gait disturbance since childhood, and his family showed similar symptoms. Neurological and electrophysiological findings suggested spinal muscular atrophy type 3. Gene analysis of lamin A/C gene showed a novel nonsense mutation p.Q353X (c.1057C > T). Further investigations revealed that he and his family members had cardiac diseases including atrioventricular block. CONCLUSIONS We report the first Japanese case of spinal muscular atrophy phenotype associated with lamin A/C mutation. When a patient presents a spinal muscular atrophy phenotype and unexplained cardiac disease, especially when the family history is positive, gene analysis of lamin A/C gene should be considered.
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Affiliation(s)
- Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16, Chuo-ku, Sapporo, 060-8543, Japan.
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16, Chuo-ku, Sapporo, 060-8543, Japan.
| | - Takashi Hayashi
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16, Chuo-ku, Sapporo, 060-8543, Japan. .,Department of Pharmacology, School of Medicine, Sapporo Medical University, South 1 West 16, Chuo-ku, Sapporo, 060-8543, Japan.
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16, Chuo-ku, Sapporo, 060-8543, Japan.
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, South 1 West 16, Chuo-ku, Sapporo, 060-8543, Japan.
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Suzuki S, Kawamata J, Iwahara N, Matsumura A, Hisahara S, Matsushita T, Sasaki M, Honmou O, Shimohama S. Corrigendum to “Intravenous mesenchymal stem cell administration exhibits therapeutic effects against 6-hydroxydopamine-induced dopaminergic neurodegeneration and glial activation in rats” [Neurosci. Lett. 584 (2015) 276–281]. Neurosci Lett 2015. [DOI: 10.1016/j.neulet.2014.12.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Matsumura A, Suzuki S, Iwahara N, Hisahara S, Kawamata J, Suzuki H, Yamauchi A, Takata K, Kitamura Y, Shimohama S. Temporal Changes of CD68 and α7 Nicotinic Acetylcholine Receptor Expression in Microglia in Alzheimer's Disease-Like Mouse Models. ACTA ACUST UNITED AC 2015; 44:409-23. [DOI: 10.3233/jad-141572] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Ayano Yamauchi
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Kazuyuki Takata
- Department of Clinical and Translational Physiology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yoshihisa Kitamura
- Department of Clinical and Translational Physiology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
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Ayaki T, Ito H, Fukushima H, Inoue T, Kondo T, Ikemoto A, Asano T, Shodai A, Fujita T, Fukui S, Morino H, Nakano S, Kusaka H, Yamashita H, Ihara M, Matsumoto R, Kawamata J, Urushitani M, Kawakami H, Takahashi R. Immunoreactivity of valosin-containing protein in sporadic amyotrophic lateral sclerosis and in a case of its novel mutant. Acta Neuropathol Commun 2014; 2:172. [PMID: 25492614 PMCID: PMC4297454 DOI: 10.1186/s40478-014-0172-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 11/27/2014] [Indexed: 12/19/2022] Open
Abstract
Background Mutations in the valosin-containing protein (VCP) gene were first found to cause inclusion- body myopathy with early-onset Paget disease and frontotemporal dementia (IBMPFD). Mutations in the VCP gene were later reported to occur in familial amyotrophic lateral sclerosis (ALS). But the role of VCP in the neurodegenerative processes that occur in ALS remains unknown. The purpose of the present study was to elucidate the role of VCP in the neurodegeneration seen in sporadic and VCP mutant ALS. Results Immunohistochemistry demonstrated that the frequency of distinct VCP-positive nuclei of spinal motor neurons of patients with sporadic ALS (SALS) and the ALS with VCP novel mutation (ALS-VCP, M158V) was increased, compared with that of the control cases. No VCP-positive inclusion bodies were observed in SALS patients, a ALS-VCP patient or in control subjects. Neuropathologic examination of the ALS-VCP case showed loss of motor neurons, the presence of Bunina bodies, and degeneration of the corticospinal tracts. Bunina bodies detected in this case were confirmed to show immunohistochemical and ultrastructural features similar to those previously described. Furthermore, neuronal intracytoplasmic inclusions immunopositive for TAR DNA-binding protein 43 kDa (TDP-43), phosphorylated TDP-43, ubiquitin (Ub), p62, and optineurin were identified in the spinal and medullary motoneurons, but not in the neocortex. Gene analysis of this ALS-VCP patient confirmed the de novo mutation of M158V, which was not found in control cases; and bioinformatics using several in silico analyses showed possible damage to the structure of VCP. Immunocytochemical study of cultured cells showed increased cytoplasmic translocation of TDP-43 in cells transfected with several mutant VCP including our patient’s compared with wild-type VCP. Conclusion These findings support the idea that VCP is associated with the pathomechanism of SALS and familial ALS with a VCP mutation, presumably acting through a dominant-negative mechanism. Electronic supplementary material The online version of this article (doi:10.1186/s40478-014-0172-0) contains supplementary material, which is available to authorized users.
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Niko Y, Moritomo H, Sugihara H, Suzuki Y, Kawamata J, Konishi GI. A novel pyrene-based two-photon active fluorescent dye efficiently excited and emitting in the 'tissue optical window (650-1100 nm)'. J Mater Chem B 2014; 3:184-190. [PMID: 32261938 DOI: 10.1039/c4tb01404a] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The development of two-photon (TP) active fluorophores remains an important issue. Dyes that can be excited and fluoresce efficiently in the 'tissue optical window' (650-1100 nm) are especially in demand to maximize the underlying performance of two-photon fluorescence microscopy (TPFM) as an advanced optical technique. Ideally, such dyes would be compatible with the 1050 nm femtosecond fibre laser, which has recently been developed as an inexpensive excitation source to make the TPFM technique universal. In this work, we designed and synthesized a novel pyrene-based acceptor-π-acceptor (A-π-A) dye, PY, which exhibited outstanding properties such as bright fluorescence (λem = 650 nm and ΦFL = 0.80) and a large two-photon absorption cross-section (1100 GM (1 GM = 10-50 cm4 per photon per molecule) at 950 nm and 380 GM at 1050 nm) in the tissue optical window. In living mitochondria, PY provided more sensitive microscopic images than current dyes and showed great potential to be a building block of TP active fluorescent probes for the 1050 nm fibre laser. We believe that the exceptional properties of PY will be extended to other fluorescent probes through further chemical modification.
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Affiliation(s)
- Yosuke Niko
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1, Ookayama, Tokyo 152-8552, Japan.
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Yoshii Y, Hoshino N, Takeda T, Moritomo H, Kawamata J, Nakamura T, Akutagawa T. The Formation of Organogels and Helical Nanofibers from Simple Organic Salts. Chemistry 2014; 20:16279-85. [DOI: 10.1002/chem.201404043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Indexed: 11/08/2022]
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Takeda T, Sugihara H, Suzuki Y, Kawamata J, Akutagawa T. Dynamic Behavior, Electrochromism, and Two-Photon Absorption of Dicyanomethylenated Quinacridone. J Org Chem 2014; 79:9669-77. [DOI: 10.1021/jo501800g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Takashi Takeda
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira
2-1-1, Sendai, Miyagi 980-8577, Japan
| | - Hiroyuki Sugihara
- Graduate
School of Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Yasutaka Suzuki
- Graduate
School of Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Jun Kawamata
- Graduate
School of Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Yamaguchi 753-8512, Japan
| | - Tomoyuki Akutagawa
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira
2-1-1, Sendai, Miyagi 980-8577, Japan
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Kobayashi K, Hitomi T, Matsumoto R, Kondo T, Kawamata J, Matsuhashi M, Hashimoto S, Ikeda H, Koide Y, Inoue Y, Takahashi R, Ikeda A. Long-term follow-up of cortical hyperexcitability in Japanese Unverricht–Lundborg disease. Seizure 2014; 23:746-50. [DOI: 10.1016/j.seizure.2014.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 05/06/2014] [Accepted: 06/03/2014] [Indexed: 10/25/2022] Open
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Tominaga M, Mochida S, Sugihara H, Satomi K, Moritomo H, Fuji A, Tomoyuki A, Suzuki Y, Kawamata J. A Red Fluorescence Two-photon Absorption Probe for Sensitive Imaging of Live Mitochondria. CHEM LETT 2014. [DOI: 10.1246/cl.140447] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Shuhei Mochida
- Graduate School of Science and Engineering, Yamaguchi University
| | | | | | | | - Akinari Fuji
- Graduate School of Medicine, Yamaguchi University
| | | | | | - Jun Kawamata
- Graduate School of Medicine, Yamaguchi University
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Miyashiro A, Matsui N, Shimatani Y, Nodera H, Izumi Y, Kuwabara S, Imai T, Baba M, Komori T, Sonoo M, Mezaki T, Kawamata J, Hitomi T, Kawamata J, Hitomi T, Kohara N, Arimura K, Hashimoto S, Arisawa K, Kusunoki S, Kaji R. Are multifocal motor neuropathy patients underdiagnosed? An epidemiological survey in Japan. Muscle Nerve 2014; 49:357-61. [PMID: 24741683 DOI: 10.1002/mus.23930] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Our objective was to do an epidemiologic survey of patients with multifocal motor neuropathy (MMN) in comparison with those with amyotrophic lateral sclerosis (ALS) in Japan. METHODS In this retrospective study, we examined 46 patients with MMN and 1,051 patients with ALS from major neuromuscular centers in Japan from 2005 to 2009. Diagnosis was based on the European Federation of Neurological Societies/Peripheral Nerve Society (EFNS/PNS) and the revised El Escorial criteria. The efficacy of intravenous immunoglobulin (IVIg) was also taken into consideration in the diagnosis of MMN. RESULTS The ratio of MMN to ALS patients (0–0.10) varied among the centers, but mostly converged to 0.05. The prevalence was estimated to be 0.29 MMN patients and 6.63 ALS patients per 100,000 population. CONCLUSIONS The frequency of MMN patients was around 1 out of 20 ALS patients, and MMN was possibly underdiagnosed in some centers.
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Moritomo H, Nakagawa K, Sugihara H, Suzuki Y, Kawamata J. Two-photon Absorption (TPA) Spectra of Tris(4,7-diphenyl-1,10-phenanthroline)metal(II) Perchlorate: Drastic Effects of Central Metal(II) Ions on TPA Cross Section. CHEM LETT 2014. [DOI: 10.1246/cl.131110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | | | | | - Jun Kawamata
- Graduate School of Medicine, Yamaguchi University
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