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Ishihara Y, Numano T, Ito D, Nishijo H, Takamoto K, Kikuchi J, Konuma S, Oka H. Development of a suitable vibration pad for renal MR elastography. Magn Reson Imaging 2024; 109:120-126. [PMID: 38492785 DOI: 10.1016/j.mri.2024.03.013] [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] [Received: 01/26/2024] [Revised: 03/04/2024] [Accepted: 03/13/2024] [Indexed: 03/18/2024]
Abstract
The aim of this study was to develop a vibration pad suitable for renal MR elastography (MRE). Chronic kidney disease (CKD) is a progressive condition affecting >800 million people worldwide. Renal fibrosis is a common pathological feature of CKD that causes fibrotic regions to be much stiffer than those in normal renal tissues. Therefore, MRE can be used to diagnose CKD because it can image organ stiffness. In MRE, the shear modulus is obtained from the wavelength of the shear waves. Therefore, it is highly important to propagate shear waves with sufficient vibration strength in the tissue. By using a three-dimensional (3D) printer, we created a "Flexible Pad" suitable for renal MRE. The Flexible Pad was placed under the back of the participant in the supine position and deformed in response to the participant's weight, adhering closely to the body surface. Six healthy volunteers participated in this study. Our Flexible Pad allowed for coherent shear waves (clear waves with little scattering and interference) to be efficiently transmitted to the kidney deep-lying tissues in the abdomen. The shear moduli of the kidney (n = 6) were 8.95 ± 0.84 kPa in the right kidney and 9.70 ± 0.99 kPa in the left kidney. Our results indicate that using our Flexible Pad for renal MRE can provide a more reliable measurement of renal shear modulus.
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Affiliation(s)
- Yoshito Ishihara
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
| | - Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Office of Radiation Technology, Keio University Hospital, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Hisao Nishijo
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, 2-1, Ichinomiya Gakuen-cho, Shimonoseki-shi, Yamaguchi 751-8503, Japan
| | - Koichi Takamoto
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, 2-1, Ichinomiya Gakuen-cho, Shimonoseki-shi, Yamaguchi 751-8503, Japan
| | - Jo Kikuchi
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Shota Konuma
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Hiromu Oka
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
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Ito D, Numano T, Habe T, Okuda S, Nozaki T, Jinzaki M. Fast abdominal magnetic resonance elastography with simultaneous encoding of three-dimensional displacements. Magn Reson Imaging 2024; 108:138-145. [PMID: 38360120 DOI: 10.1016/j.mri.2024.02.009] [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] [Received: 10/21/2023] [Revised: 02/07/2024] [Accepted: 02/11/2024] [Indexed: 02/17/2024]
Abstract
Three-dimensional (3D) magnetic resonance elastography (MRE) is more accurate than two-dimensional (2D) MRE; however, it requires long-term acquisition. This study aimed to reduce the acquisition time of abdominal 3D MRE using a new sample interval modulation (short-SLIM) approach that can acquire all three motions faster while reducing the prolongation of echo time and flow compensation. To this end, two types of phantom studies and an in vivo test of the liver in three healthy volunteers were performed to compare the performances of conventional spin-echo echo-planar (SE-EPI) MRE, conventional SLIM and short-SLIM. One phantom study measured the mean amplitude and shear modulus within the overall region of a homogeneous phantom by changing the mechanical vibration power to assess the robustness to the lowered phase-to-noise ratio in short-SLIM. The other measured the mean shear modulus in the stiff and background materials of a phantom with an embedded stiffer rod to assess the performance of short-SLIM for complex wave patterns with wave interference. The Spearman's rank correlation coefficient was used to assess similarity of elastograms in the rod-embedded phantom and liver between methods. The results of the phantom study changing the vibration power indicated that there was little difference between conventional MRE and short-SLIM. Moreover, the elastogram pattern and the mean shear modulus in the rod-embedded phantom in conventional SLIM and short-SLIM did not change for conventional MRE; the liver test also showed a small difference between the acquisition techniques. This study demonstrates that short-SLIM can provide MRE results comparable to those of conventional MRE. Short-SLIM can reduce the total acquisition time by a factor of 2.25 compared to conventional 3D MRE time, leading to an improvement in the accuracy of shear modulus estimation by suppressing the patient movements.
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Affiliation(s)
- Daiki Ito
- Office of Radiation Technology, Keio University Hospital, 35, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tetsushi Habe
- Office of Radiation Technology, Keio University Hospital, 35, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Shigeo Okuda
- Department of Diagnostic Radiology, National Tokyo Medical Center, 2-5-1, Higashigaoka, Meguro-ku, Tokyo 152-8902, Japan; Department of Radiology, Keio University School of Medicine, 35, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Taiki Nozaki
- Department of Radiology, Keio University School of Medicine, 35, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Masahiro Jinzaki
- Department of Radiology, Keio University School of Medicine, 35, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
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Soeda S, Ito D, Ogushi T, Sano Y, Negoro R, Fujita T, Saito R, Taniura H. Defects in early synaptic formation and neuronal function in Prader-Willi syndrome. Sci Rep 2023; 13:12053. [PMID: 37491450 PMCID: PMC10368700 DOI: 10.1038/s41598-023-39065-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/19/2023] [Indexed: 07/27/2023] Open
Abstract
Prader-Willi syndrome (PWS), which is a complex epigenetic disorder caused by the deficiency of paternally expressed genes in chromosome 15q11-q13, is associated with several psychiatric dimensions, including autism spectrum disorder. We have previously reported that iPS cells derived from PWS patients exhibited aberrant differentiation and transcriptomic dysregulation in differentiated neural stem cells (NSCs) and neurons. Here, we identified SLITRK1 as a downregulated gene in NSCs differentiated from PWS patient iPS cells by RNA sequencing analysis. Because SLITRK1 is involved in synaptogenesis, we focused on the synaptic formation and function of neurons differentiated from PWS patient iPS cells and NDN or MAGEL2 single gene defect mutant iPS cells. Although βIII tubulin expression levels in all the neurons were comparable to the level of differentiation in the control, pre- and postsynaptic markers were significantly lower in PWS and mutant neurons than in control neurons. PSD-95 puncta along βIII tubulin neurites were also decreased. Membrane potential responses were measured while exposed to high K+ stimulation. The neuronal excitabilities in PWS and mutant neurons showed significantly lower intensity than that of control neurons. These functional defects in PWS neurons may reflect phenotypes of neurodevelopmental disorders in PWS.
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Affiliation(s)
- Shuhei Soeda
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga, 525-8577, Japan.
| | - Daiki Ito
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga, 525-8577, Japan
| | - Tomoe Ogushi
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga, 525-8577, Japan
| | - Yui Sano
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga, 525-8577, Japan
| | - Ryosuke Negoro
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Takuya Fujita
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan
| | - Ryo Saito
- Mitsubishi Tanabe Pharma Corporation, Kamoshida, Aoba, Yokohama, 227-0033, Japan
| | - Hideo Taniura
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga, 525-8577, Japan
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Watanabe T, Hirai J, Sildever S, Tadokoro K, Hidaka K, Tanita I, Nishiuchi K, Iguchi N, Kasai H, Nishi N, Katakura S, Taniuchi Y, Kodama T, Tashiro S, Nakae M, Okazaki Y, Kitajima S, Sogawa S, Hasegawa T, Azumaya T, Hiroe Y, Ambe D, Setou T, Ito D, Kusaka A, Okunishi T, Tanaka T, Kuwata A, Hasegawa D, Kakehi S, Shimizu Y, Nagai S. Improving taxonomic classification of marine zooplankton by molecular approach: registration of taxonomically verified 18S and 28S rRNA gene sequences. PeerJ 2023; 11:e15427. [PMID: 37334134 PMCID: PMC10276563 DOI: 10.7717/peerj.15427] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 04/25/2023] [Indexed: 06/20/2023] Open
Abstract
Background Zooplankton plays an important role in the marine ecosystem. A high level of taxonomic expertise is necessary for accurate species identification based on morphological characteristics. As an alternative method to morphological classification, we focused on a molecular approach using 18S and 28S ribosomal RNA (rRNA) gene sequences. This study investigates how the accuracy of species identification by metabarcoding improves when taxonomically verified sequences of dominant zooplankton species are added to the public database. The improvement was tested by using natural zooplankton samples. Methods rRNA gene sequences were obtained from dominant zooplankton species from six sea areas around Japan and registered in the public database for improving the accuracy of taxonomic classifications. Two reference databases with and without newly registered sequences were created. Comparison of detected OTUs associated with single species between the two references was done using field-collected zooplankton samples from the Sea of Okhotsk for metabarcoding analysis to verify whether or not the newly registered sequences improved the accuracy of taxonomic classifications. Results A total of 166 sequences in 96 species based on the 18S marker and 165 sequences in 95 species based on the 28S marker belonging to Arthropoda (mostly Copepoda) and Chaetognatha were registered in the public database. The newly registered sequences were mainly composed of small non-calanoid copepods, such as species belonging to Oithona and Oncaea. Based on the metabarcoding analysis of field samples, a total of 18 out of 92 OTUs were identified at the species level based on newly registered sequences in the data obtained by the 18S marker. Based on the 28S marker, 42 out of 89 OTUs were classified at the species level based on taxonomically verified sequences. Thanks to the newly registered sequences, the number of OTUs associated with a single species based on the 18S marker increased by 16% in total and by 10% per sample. Based on the 28S marker, the number of OTUs associated with a single species increased by 39% in total and by 15% per sample. The improved accuracy of species identification was confirmed by comparing different sequences obtained from the same species. The newly registered sequences had higher similarity values (mean >0.003) than the pre-existing sequences based on both rRNA genes. These OTUs were identified at the species level based on sequences not only present in the Sea of Okhotsk but also in other areas. Discussion The results of the registration of new taxonomically verified sequences and the subsequent comparison of databases based on metabarcoding data of natural zooplankton samples clearly showed an increase in accuracy in species identification. Continuous registration of sequence data covering various environmental conditions is necessary for further improvement of metabarcoding analysis of zooplankton for monitoring marine ecosystems.
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Affiliation(s)
- Tsuyoshi Watanabe
- Kushiro Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Kushiro, Japan
| | - Junya Hirai
- Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
| | - Sirje Sildever
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
- Department of Marine Systems, Tallinn University of Technology, Tallinn, Estonia
| | - Kazuaki Tadokoro
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Kiyotaka Hidaka
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Iwao Tanita
- Yaeyama Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Ishigaki, Japan
| | - Koh Nishiuchi
- Nagasaki Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Nagasaki, Japan
| | - Naoki Iguchi
- Niigata Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Niigata, Japan
| | - Hiromi Kasai
- Kushiro Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Kushiro, Japan
| | | | | | - Yukiko Taniuchi
- Kushiro Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Kushiro, Japan
| | - Taketoshi Kodama
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
- Present Address: Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
| | - Satokuni Tashiro
- Yaeyama Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Ishigaki, Japan
| | - Misato Nakae
- Niigata Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Niigata, Japan
| | - Yuji Okazaki
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Satoshi Kitajima
- Nagasaki Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Nagasaki, Japan
| | - Sayaka Sogawa
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Toru Hasegawa
- Nagasaki Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Nagasaki, Japan
| | - Tomonori Azumaya
- Kushiro Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Kushiro, Japan
| | - Yutaka Hiroe
- Nagasaki Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Nagasaki, Japan
| | - Daisuke Ambe
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Takashi Setou
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Daiki Ito
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Akira Kusaka
- Yokohama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Takeshi Okunishi
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Takahiro Tanaka
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Akira Kuwata
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Daisuke Hasegawa
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Shigeho Kakehi
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Yugo Shimizu
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Satoshi Nagai
- Yokohama Field Station, Fisheries Technology Institute, Fisheries Research and Education Agency, Yokohama, Japan
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Ito D, Habe T, Numano T, Okuda S, Soga S, Jinzaki M. A Versatile MR Elastography Research Tool with a Modified Motion Signal-to-noise Ratio Approach. Magn Reson Med Sci 2023. [PMID: 37045750 DOI: 10.2463/mrms.mp.2022-0149] [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: 04/14/2023] Open
Abstract
PURPOSE This study aimed to facilitate research progress in MR elastography (MRE) by providing a versatile and convenient application for MRE reconstruction, namely the MRE research tool (MRE-rTool). It can be used for a series of MRE image analyses, including phase unwrapping, arbitrary bandpass and directional filtering, noise assessment of the wave propagation image (motion SNR), and reconstruction of the elastogram in both 2D and 3D MRE acquisitions. To reinforce the versatility of MRE-rTool, the conventional method of motion SNR was modified into a new method that reflects the effects of image filtering. METHODS MRE tests of the phantom and liver were performed using different estimation algorithms for stiffness value (algebraic inversion of the differential equation [AIDE], local frequency estimation [LFE] in MRE-rTool, and multimodel direct inversion [MMDI] in clinical reconstruction) and acquiring dimensions (2D and 3D acquisitions). This study also tested the accuracy of masking low SNR regions using modified and conventional motion SNR under various mechanical vibration powers. RESULTS The stiffness values estimated using AIDE/LFE in MRE-rTool were comparable to that of MMDI (phantom, 3.71 ± 0.74, 3.60 ± 0.32, and 3.60 ± 0.54 kPa in AIDE, LFE, and MMDI; liver, 2.26 ± 0.31, 2.74 ± 0.16, and 2.21 ± 0.26 kPa in AIDE, LFE, and MMDI). The stiffness value in 3D acquisition was independent of the direction of the motion-encoding gradient and was more accurate than that of 2D acquisition. The masking of low SNR regions using the modified motion SNR worked better than that in the conventional motion SNR for each vibration power, especially when using a directional filter. CONCLUSION The performance of MRE-rTool on test data reached the level required in clinical MRE studies. MRE-rTool has the potential to facilitate MRE research, contribute to the future development of MRE, and has been freely released online.
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Affiliation(s)
- Daiki Ito
- Office of Radiation Technology, Keio University Hospital
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Tetsushi Habe
- Office of Radiation Technology, Keio University Hospital
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
- Health Research Institute, National Institute of Advanced Industrial Science and Technology
| | - Shigeo Okuda
- Department of Radiology, Keio University School of Medicine
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Sekiguchi N, Shiozawa N, Ishikawa C, Kitagawa M, Nakayama T, Ito D. Myxoid meningioma in a dog. J Small Anim Pract 2023; 64:118. [PMID: 36428278 DOI: 10.1111/jsap.13576] [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] [Received: 04/14/2022] [Revised: 08/25/2022] [Accepted: 10/13/2022] [Indexed: 11/27/2022]
Affiliation(s)
- N Sekiguchi
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Shiozawa
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - T Nakayama
- Laboratory of Veterinary Radiology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - D Ito
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan.,Laboratory of Veterinary Radiology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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Maemoto T, Kitai Y, Takahashi R, Shoji H, Yamada S, Takei S, Ito D, Muromoto R, Kashiwakura JI, Handa H, Hashimoto A, Hashimoto S, Ose T, Oritani K, Matsuda T. A peptide derived from adaptor protein STAP-2 inhibits tumor progression by downregulating epidermal growth factor receptor signaling. J Biol Chem 2022; 299:102724. [PMID: 36410436 PMCID: PMC9800302 DOI: 10.1016/j.jbc.2022.102724] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 11/12/2022] [Accepted: 11/14/2022] [Indexed: 11/20/2022] Open
Abstract
Signal-transducing adaptor family member-2 (STAP-2) is an adaptor protein that regulates various intracellular signals. We previously demonstrated that STAP-2 binds to epidermal growth factor receptor (EGFR) and facilitates its stability and activation of EGFR signaling in prostate cancer cells. Inhibition of this interaction may be a promising direction for cancer treatment. Here, we found that 2D5 peptide, a STAP-2-derived peptide, blocked STAP-2-EGFR interactions and suppressed EGFR-mediated proliferation in several cancer cell lines. 2D5 peptide inhibited tumor growth of human prostate cancer cell line DU145 and human lung cancer cell line A549 in murine xenograft models. Additionally, we determined that EGFR signaling and its stability were decreased by 2D5 peptide treatment during EGF stimulation. In conclusion, our study shows that 2D5 peptide is a novel anticancer peptide that inhibits STAP-2-mediated activation of EGFR signaling and suppresses prostate and lung cancer progression.
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Affiliation(s)
- Taiga Maemoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuichi Kitai
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan,For correspondence: Yuichi Kitai; Tadashi Matsuda
| | - Runa Takahashi
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Haruka Shoji
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Shunsuke Yamada
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Shiho Takei
- Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Daiki Ito
- Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ryuta Muromoto
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Jun-ichi Kashiwakura
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Haruka Handa
- Department of Molecular Biology, Faculty of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ari Hashimoto
- Department of Molecular Biology, Faculty of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Shigeru Hashimoto
- Division of Molecular Psychoimmunology, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Toyoyuki Ose
- Faculty of Advanced Life Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kenji Oritani
- Department of Hematology, International University of Health and Welfare, Narita, Chiba, Japan
| | - Tadashi Matsuda
- Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Hokkaido, Japan,For correspondence: Yuichi Kitai; Tadashi Matsuda
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Ito D, Ishikawa C, Sekiguchi N, Kitagawa M. Syringomyelia fluid flow on time-spatial labeling inversion pulse (Time-SLIP) images in a dog. J Small Anim Pract 2022; 63:911. [PMID: 36096494 DOI: 10.1111/jsap.13551] [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] [Received: 05/27/2021] [Revised: 07/11/2022] [Accepted: 08/12/2022] [Indexed: 11/27/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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Habe T, Numano T, Nishijo H, Iwama Y, Takamoto K, Ito D, Mizuhara K, Osada K, Kanai M. Time-course of physical properties of the psoas major muscle after exercise as assessed by MR elastography. Magn Reson Imaging 2022; 92:133-139. [PMID: 35772585 DOI: 10.1016/j.mri.2022.06.011] [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] [Received: 01/31/2022] [Revised: 06/16/2022] [Accepted: 06/23/2022] [Indexed: 11/15/2022]
Abstract
This study aimed to analyze the time-course of the physical properties of the psoas major muscle (PM) before and after exercise using magnetic resonance elastography (MRE). Muscle stiffness is one of the important properties associated with muscle function. However, there was no research on the stiffness of the PM after exercise. In this study, we investigated time-course changes of the shear modulus of the PM after exercise. Furthermore, T2 values and apparent diffusion coefficient (ADC), as the additional information associated with muscular physical properties, were also measured simultaneously. Healthy young male volunteers were recruited in this study (n = 9) and they were required to perform a hand-to-knee isometric and unilateral exercise (left side). At each time-point before and after exercise, a set of 3 types of MR scans to measure multiple physical properties of the PM [shear modulus (MRE), T2 values, and ADC] were repeatedly taken. On day 1, a single set MR scan was taken before exercise (pre-exercise MR scan), and 6 sets MR scans were taken (5.5 to 38.0 min after exercise). After about 10-min rest (46.0 to 56.0 min after exercise), 4 sets MR scans were taken (57.5 to 77.0 min after exercise). About 10-min rest was taken again (85.0-95.0 min after exercise), 4 sets MR scans were taken (96.5 to 116.0 min after exercise). On days 2 and 7, a single set MR scan (MRE, T2 value, and ADC) was taken on each experimental day. The data were analyzed as relative changes (%) of the given parameters to the pre-exercise values. The results indicated significant decreases in PM shear modulus up to about 30 min after exercise. Then, it gradually increased and showed significant increases at about 100 min after exercise compared to that before exercise. T2 values and ADC showed significant increases up to about 65 min after exercise compared to those before exercise, and then returned to the pre-exercise values. On days 2 and 7, all values showed no significant changes compared to the pre-exercise values. This study is the first to report the time-course of the physical properties of the PM after exercise.
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Affiliation(s)
- Tetsushi Habe
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan; Office of Radiation Technology, Keio University Hospital, Tokyo, Japan
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan; Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan.
| | - Hisao Nishijo
- System Emotional Science, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Yudai Iwama
- System Emotional Science, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Kouichi Takamoto
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, Yamaguchi, Japan
| | - Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan; Office of Radiation Technology, Keio University Hospital, Tokyo, Japan
| | - Kazuyuki Mizuhara
- Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan; Department of Mechanical Engineering, Tokyo Denki University, Tokyo, Japan
| | - Kaito Osada
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Midori Kanai
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
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10
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Sekiguchi N, Ito D, Ishikawa C, Tanaka N, Kitagawa M. Heavily T2-weighted imaging findings of spinal cord swelling in dogs with intervertebral disc extrusion. J S Afr Vet Assoc 2022. [DOI: 10.36303/jsava.2022.93.1.500] [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: 02/09/2023] Open
Affiliation(s)
- N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - N Tanaka
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
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11
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Sekiguchi N, Ito D, Ishikawa C, Tanaka N, Kitagawa M. Heavily T2-weighted imaging findings of spinal cord swelling in dogs with intervertebral disc extrusion. J S Afr Vet Assoc 2022; 93:16-24. [PMID: 35950805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023] Open
Abstract
This study investigated causes of attenuation of cerebrospinal fluid (CSF) signal on heavily T2-weighted (T2W) images in dogs with thoracolumbar disc extrusion. Medical records and magnetic resonance images were retrospectively reviewed. Dogs were classified into the following grades; grade 1, non-ambulatory paraparesis; grade 2, paraplegia with deep pain perception and grade 3, paraplegia without deep pain perception. The length of intramedullary T2W hyperintensity of the spinal cord, cranial/ caudal expansion of extradural compressive materials (ECM), and the CSF signal attenuation were measured. Ratios to the second lumbar vertebra (L2) were calculated for the length of intramedullary T2W hyperintensity (T2W:L2), cranial/caudal expansion of ECM (ECML:L2), and CSF signal attenuation (CSF:L2). The dogs were classified into focal or extended T2W hyperintensity groups according to the length [focal, shorter than length of L2; extended, longer than L2]. The area of EMC and the spinal canal were measured on transverse images at the lesion deriving occupancy ratio. The correlation between CSF:L2 and other data were analysed, and CSF:L2 was compared between the grades. In dogs with intramedullary T2W hyperintensity, the locations of CSF attenuation and the hyperintensity were compared if those locations were matched. Fifty-five dogs were included, 36 of which showed intramedullary T2W hyperintensity. Twenty-two of 36 dogs were considered as match of the location of the CSF attenuation and hyperintensity. CSF:L2 was significantly correlated with T2W:L2 in dogs with extended T2W hyperintensity (p = 0.0002), while CSF:L2 was significantly correlated with ECML:L2 in dogs with focal or no T2W hyperintensity (p = 0.0103 and p = 0.0364, respectively). CSF:L2 in grade 3 was significantly greater than those in patients who were grade 1 or 2 (both p < 0.001). In conclusion, higher CSF:L2, which was frequently seen in grade 3, would be most consistent with a higher T2W:L2 which might indicate spinal cord swelling.
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Affiliation(s)
- N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - N Tanaka
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
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12
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Kanno I, Ito D. Iodine tomographic images derived from a small number of X-ray transmission measurements using material thickness distributions. J NUCL SCI TECHNOL 2022. [DOI: 10.1080/00223131.2022.2077260] [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: 10/18/2022]
Affiliation(s)
- Ikuo Kanno
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan
| | - Daiki Ito
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan
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13
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Ito D, Miura K, Saeki M, Yamasaki N, Ogata S, Koyama T, Hiroi T, Mori A, Endou H, Hayashi K, Kaminuma O. L-type amino acid transporter 1 inhibitor suppresses murine Th2 cell-mediated bronchial hyperresponsiveness independently of eosinophil accumulation. Asia Pac Allergy 2021; 11:e33. [PMID: 34386409 PMCID: PMC8331261 DOI: 10.5415/apallergy.2021.11.e33] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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] [Received: 01/25/2021] [Accepted: 07/06/2021] [Indexed: 11/23/2022] Open
Abstract
Background The activation of Th2 cells that play a pivotal role in the development of allergic eosinophilic inflammation is regulated by an L-type amino acid transporter (LAT) 1. However, the contribution of LAT1 to the pathogenesis of Th2 cell-mediated airway inflammation has not been investigated. Objective In this study, we investigated the effect of a LAT1 inhibitor, JPH203, on Th2 cell-mediated airway eosinophilic inflammation. Methods BALB/c mice were transferred with ovalbumin (OVA)-specific Th2 cell and challenged by corresponding allergen with or without administration of JPH203. Then, the infiltration of inflammatory cells including eosinophils and allergen-specific Th2 cells in the lungs and bronchial hyperresponsiveness (BHR) was assessed. Results Inflammatory responses in the lungs with massive accumulation of eosinophils and BHR were induced in Th2 cell-transferred mice upon challenge with OVA. The treatment with JPH203 significantly suppressed the allergen-induced BHR but not eosinophil infiltration. The infused Th2 cells were also accumulated in the lungs upon allergen challenge, though the response was not affected by JPH203 treatment. Conclusion JPH203 suppressed Th2 cell-mediated BHR through the mechanisms independently of the lung accumulation of eosinophils and Th2 cells.
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Affiliation(s)
- Daiki Ito
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Kento Miura
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Mayumi Saeki
- Allergy and Immunology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Norimasa Yamasaki
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Sawako Ogata
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Teidai Koyama
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Takachika Hiroi
- Allergy and Immunology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Akio Mori
- Clinical Research Center for Allergy and Rheumatology, National Hospital Organization, Sagamihara National Hospital, Sagamihara, Japan
| | | | - Keitaro Hayashi
- Department of Pharmacology and Toxicology, Dokkyo Medical University School of Medicine, Shimotsuga, Japan
| | - Osamu Kaminuma
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.,Allergy and Immunology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Clinical Research Center for Allergy and Rheumatology, National Hospital Organization, Sagamihara National Hospital, Sagamihara, Japan
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14
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Koyama T, Miura K, Yamasaki N, Ogata S, Ito D, Saeki M, Hiroi T, Mori A, Kaminuma O. Suppressive effect of dexamethasone on murine Th9 cell-mediated nasal eosinophilic inflammation. Asia Pac Allergy 2021; 11:e25. [PMID: 34386401 PMCID: PMC8331257 DOI: 10.5415/apallergy.2021.11.e25] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 07/06/2021] [Indexed: 01/05/2023] Open
Abstract
Background Th9 cells have been implicated in the development of allergic inflammation, though its contribution to allergic rhinitis and the effect of steroid on Th9 cell-mediated nasal responses are unclear. Objective In this study, allergen-induced nasal inflammatory responses and their steroid responsiveness were investigated in ovalbumin (OVA)-specific Th9 cell-transferred mice. Methods BALB/c mice were transferred with in vitro-differentiated Th9 cells and challenged by intranasal injection of OVA with or without subcutaneous administration of dexamethasone (Dex). Then, the infiltration of inflammatory cells in the nasal mucosa and nasal hyperresponsiveness (NHR) was assessed. Results The significant NHR accompanied by nasal infiltration of eosinophils as well as allergen-specific T cells was induced in Th9 cell-transferred mice upon allergen challenge. These responses were strongly suppressed by the treatment with Dex. Conclusion The participation of Th9 cells in the pathogenesis of allergic rhinitis was suggested.
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Affiliation(s)
- Teidai Koyama
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Kento Miura
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Norimasa Yamasaki
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Sawako Ogata
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Daiki Ito
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan
| | - Mayumi Saeki
- Allergy and Immunology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Takachika Hiroi
- Allergy and Immunology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Akio Mori
- Clinical Research Center for Allergy and Rheumatology, National Hospital Organization, Sagamihara National Hospital, Kanagawa, Japan
| | - Osamu Kaminuma
- Department of Disease Model, Research Institute of Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.,Allergy and Immunology Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Clinical Research Center for Allergy and Rheumatology, National Hospital Organization, Sagamihara National Hospital, Kanagawa, Japan
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15
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Ito D, Shiozawa N, Sekiguchi N, Ishikawa C, Jeffery ND. Simple ectopic left kidney in the pelvic cavity in a cat. J Small Anim Pract 2021; 62:930. [PMID: 33997982 DOI: 10.1111/jsap.13357] [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] [Received: 03/18/2021] [Revised: 04/20/2021] [Accepted: 04/29/2021] [Indexed: 11/28/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Shiozawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, 77843, USA
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16
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Chen DV, Suzuki T, Itoh Y, Maeda Y, Hirano J, Haga S, Zhang H, Ito D, Matsuura Y, Okamoto T. Deneddylation by SENP8 restricts hepatitis B virus propagation. Microbiol Immunol 2021; 65:125-135. [PMID: 33433029 DOI: 10.1111/1348-0421.12874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/05/2021] [Accepted: 01/08/2021] [Indexed: 12/15/2022]
Abstract
Proteins newly synthesized from messenger RNA undergo Posttranslational modifications (PTMs) such as phosphorylation, glycosylation, methylation, and ubiquitination. These PTMs have important roles in protein stability, localization, and conformation and have been reported to be involved in hepatitis B virus (HBV) propagation. Although ubiquitination plays an essential role in HBV life cycles, the involvement of ubiquitin-like proteins (UBLs) in HBV life cycles has been understudied. Through comprehensive gain- and loss-of-function screening of UBLs, we observed that neddylation, a PTM in which neural precursor cell, expressed developmentally downregulated 8 (NEDD8) is conjugated to substrate proteins, was required for efficient HBV propagation. We also found that overexpression of sentrin-specific protease 8 (SENP8), which cleaves conjugated NEDD8, suppressed HBV propagation. Further, the catalytic activity of SENP8 was required for the suppression of HBV propagation. These results indicated that the reduction of neddylation negatively regulated HBV propagation. In addition, we demonstrated that suppression of HBV propagation via SENP8 overexpression was independent of hepatitis B protein X (HBx) and HBV promoter activity. Therefore, our data suggested that neddylation plays an important role in the late stages of HBV life cycles.
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Affiliation(s)
- David Virya Chen
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Tatsuya Suzuki
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Yumi Itoh
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Yusuke Maeda
- Department of Molecular Virology, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Junki Hirano
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Saori Haga
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - He Zhang
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Daiki Ito
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Yoshiharu Matsuura
- Department of Molecular Virology, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Toru Okamoto
- Institute for Advanced Co-Creation Studies, Research, Institute for Microbial Diseases, Osaka University, Suita, Japan
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17
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Saito A, Shinjo S, Ito D, Doi Y, Sato A, Wakabayashi Y, Honda J, Arai Y, Maeda T, Ohyama T, Higuchi K. Enhancement of Photosynthetic Iron-Use Efficiency Is an Important Trait of Hordeum vulgare for Adaptation of Photosystems to Iron Deficiency. Plants (Basel) 2021; 10:plants10020234. [PMID: 33504088 PMCID: PMC7911540 DOI: 10.3390/plants10020234] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/12/2021] [Accepted: 01/18/2021] [Indexed: 05/28/2023]
Abstract
Leaf iron (Fe) contents in Fe-deficiency-tolerant plants are not necessarily higher than that in Fe-deficiency-susceptible ones, suggesting an unknown mechanism involved in saving and allowing the efficient use of minimal Fe. To quantitatively evaluate the difference in Fe economy for photosynthesis, we compared the ratio of CO2 assimilation rate to Fe content in newly developed leaves as a novel index of photosynthetic iron-use efficiency (PIUE) among 23 different barley (Hordeum vulgare L.) varieties. Notably, varieties originating from areas with alkaline soil increased PIUE in response to Fe-deficiency, suggesting that PIUE enhancement is a crucial and genetically inherent trait for acclimation to Fe-deficient environments. Multivariate analyses revealed that the ability to increase PIUE was correlated with photochemical quenching (qP), which is a coefficient of light energy used in photosynthesis. Nevertheless, the maximal quantum yield of photosystem II (PSII) photochemistry, non-photochemical quenching, and quantum yield of carbon assimilation showed a relatively low correlation with PIUE. This result suggests that the ability of Fe-deficiency-tolerant varieties of barley to increase PIUE is related to optimizing the electron flow downstream of PSII, including cytochrome b6f and photosystem I.
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18
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Uemura K, Ito D, Pirillo J, Hijikata Y, Saeki A. Modulation of Band Gaps toward Varying Conductivities in Heterometallic One-Dimensional Chains by Ligand Alteration and Third Metal Insertion. ACS Omega 2020; 5:30502-30518. [PMID: 33283099 PMCID: PMC7711699 DOI: 10.1021/acsomega.0c04317] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 11/02/2020] [Indexed: 06/12/2023]
Abstract
A heterometallic one-dimensional (1-D) chain consisting of multiple kinds of metals, Rh, Pt, and Pd, with direct metal-metal bonds was successfully obtained by mixing a Rh dinuclear complex and Pt-Pd-Pt trinuclear complex. The Pt-Pd-Pt trinuclear complex can be reversibly one-electron-oxidized or -reduced, where the electron paramagnetic resonance spectrum of the one-electron-oxidized one shows an axially symmetric signal with hyperfine splitting by two Pt and Pd, indicating that an unpaired electron is delocalized to the d z 2 orbital of Pt-Pd-Pt. Utilized with the highest occupied molecular orbital and lowest unoccupied molecular orbital interaction at the d z 2 orbital, simple mixing of the Pt-Pd-Pt trinuclear complex and Rh dinuclear complex in adequate solvents afforded heterometallic 1-D chains, which are aligned as -Rh-Rh-Pt-Pd-Pt-. Several physical measurements revealed that the metal oxidation state is +2. Diffuse reflectance spectra and theoretical calculations show that heterometallic 1-D chains have σ-type conduction and valence bands where π*(Rh2) are lying between them, whose gaps become narrower than the prototype chains aligned as -Rh-Rh-Pt-Pt-Pt-Pt-. The narrower band gaps are induced by destabilization of the σ-type valence bands and accompanied by insertion of Pd ions because the d-orbital energy level of Pd is closer in value to Rh compared with Pt. Flash-photolysis time-resolved microwave conductivity measurements exhibited an increase in the product of charge carrier mobility and its generation efficiency (8.1 × 10-5 to 4.6 × 10-4 cm2 V-1 s-1) with narrowing the band gaps, suggesting that the better conductivity is attributed to shorter metal-metal distances in 1-D chains. These results imply the possibilities of controlling band gap with ligand modification and third metal insertion in heterometallic 1-D chains to show various conductivities.
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Affiliation(s)
- Kazuhiro Uemura
- Department
of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Daiki Ito
- Department
of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan
| | - Jenny Pirillo
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Yuh Hijikata
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Akinori Saeki
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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19
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Ito D, Ishikawa C, Sekiguchi N, Jeffery ND, Kitagawa M. Utility of "MR myelography" in diagnosis of a presumed spinal subarachnoid diverticulum. J Small Anim Pract 2020; 61:782. [PMID: 33045762 DOI: 10.1111/jsap.13208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 12/01/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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20
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Ito D, Shirasawa R, Iino Y, Tomiya S, Tanaka G. Estimation and prediction of ellipsoidal molecular shapes in organic crystals based on ellipsoid packing. PLoS One 2020; 15:e0239933. [PMID: 32997718 PMCID: PMC7526905 DOI: 10.1371/journal.pone.0239933] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 09/16/2020] [Indexed: 11/19/2022] Open
Abstract
Crystal structure prediction has been one of the fundamental and challenging problems in materials science. It is computationally exhaustive to identify molecular conformations and arrangements in organic molecular crystals due to complexity in intra- and inter-molecular interactions. From a geometrical viewpoint, specific types of organic crystal structures can be characterized by ellipsoid packing. In particular, we focus on aromatic systems which are important for organic semiconductor materials. In this study, we aim to estimate the ellipsoidal molecular shapes of such crystals and predict them from single molecular descriptors. First, we identify the molecular crystals with molecular centroid arrangements that correspond to affine transformations of four basic cubic lattices, through topological analysis of the dataset of crystalline polycyclic aromatic molecules. The novelty of our method is that the topological data analysis is applied to arrangements of molecular centroids intead of those of atoms. For each of the identified crystals, we estimate the intracrystalline molecular shape based on the ellipsoid packing assumption. Then, we show that the ellipsoidal shape can be predicted from single molecular descriptors using a machine learning method. The results suggest that topological characterization of molecular arrangements is useful for structure prediction of organic semiconductor materials.
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Affiliation(s)
- Daiki Ito
- Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Raku Shirasawa
- Materials Analysis Center, Fundamental Technology Research and Development Division 2, R&D Center, Sony Corporation, Atsugi, Japan
| | - Yoichiro Iino
- Materials Analysis Center, Fundamental Technology Research and Development Division 2, R&D Center, Sony Corporation, Atsugi, Japan
| | - Shigetaka Tomiya
- Materials Analysis Center, Fundamental Technology Research and Development Division 2, R&D Center, Sony Corporation, Atsugi, Japan
| | - Gouhei Tanaka
- Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
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21
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Ito D, Ishikawa C, Jeffery ND, Kitagawa M. Intraventricular carcinoma in a dog. J Small Anim Pract 2020; 62:234. [PMID: 32989762 DOI: 10.1111/jsap.13228] [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] [Received: 07/21/2020] [Revised: 08/18/2020] [Accepted: 08/26/2020] [Indexed: 11/29/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan
| | - N D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, Texas, 77843, USA
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan
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22
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Hoshiba Y, Sugimoto A, Doi S, Sawada T, Tamiya S, Ito D, Iseki H. Discontinuation of Cardiac Resynchronization Therapy for Heart Failure Due to Dilated Cardiomyopathy in a 61-Year-Old Female "-Super-Responder" with Return of a Reduced Left Ventricular Ejection Fraction to Normal. Am J Case Rep 2020; 21:e926704. [PMID: 32986689 PMCID: PMC7532525 DOI: 10.12659/ajcr.926704] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Patient: Female, 61-year-old Final Diagnosis: Dilated cardiomyopathy Symptoms: Dyspnea on exertion Medication:— Clinical Procedure: Medications and CRT Specialty: Cardiology
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Affiliation(s)
- Yasunari Hoshiba
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
| | - Atsuhiko Sugimoto
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
| | - Shoko Doi
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
| | - Tomokazu Sawada
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
| | - Seiji Tamiya
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
| | - Daiki Ito
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
| | - Harukazu Iseki
- Department of Cardiovascular Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan
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23
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Nagata Y, Sawada R, Sasaki S, Sugano H, Nishimura T, Noguchi M, Yatabe S, Takeda Y, Ito D, Ohkuma M, Nagasaki E, Kosuge M, Amano K, Eto K, Saruta M. P-207 Impact of renal function on CAPOX / FOLFOX adjuvant chemotherapy in colon cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.289] [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] Open
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24
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Ito D, Numano T, Ueki T, Habe T, Maeno T, Takamoto K, Igarashi K, Maharjan S, Mizuhara K, Nishijo H. Magnetic resonance elastography of the supraspinatus muscle: A preliminary study on test-retest repeatability and wave quality with different frequencies and image filtering. Magn Reson Imaging 2020; 71:27-36. [PMID: 32325234 DOI: 10.1016/j.mri.2020.04.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 04/13/2020] [Accepted: 04/13/2020] [Indexed: 12/17/2022]
Abstract
The purpose of this study was to determine an optimal condition (vibration frequency and image filtering) for stiffness estimation with high accuracy and stiffness measurement with high repeatability in magnetic resonance elastography (MRE) of the supraspinatus muscle. Nine healthy volunteers underwent two MRE exams separated by at least a 30 min break, on the same day. MRE acquisitions were performed with a gradient-echo type multi-echo MR sequence at 75, 100, and 125 Hz pneumatic vibration. Wave images were processed by a bandpass filter or filter combining bandpass and directional filters (bandpass-directional filter). An observer specified the region of interest (ROI) on clear wave propagation in the supraspinatus muscle, within which the observer measured the stiffness. This study assessed wave image quality according to two indices, as a substitute for the assessment of the accuracy of the stiffness estimation. One is the size of the clear wave propagation area (ROI size used to measure the stiffness) and the other is the qualitative stiffness resolution score in that area. These measurements made by the observer were repeated twice at least one month apart after each MRE exam. This study assessed the intra-examiner and observer repeatability of the stiffness value, ROI size and resolution score in each combination of vibration frequency and image filter. Repeatability of the data was analyzed using the intraclass correlation coefficient (ICC) and 95% limits-of-agreement (LOA) in Bland-Altman analysis. The analyses on intra-examiner and observer repeatability of stiffness indicated that the ICC and 95% LOA were not varied greatly depending on vibration frequency and image filter (intra-examiner repeatability, ICC range, 0.79 to 0.88; 95% LOA range, ±23.95 to ±32.42%, intra-observer repeatability, ICC range, 0.98 to 1.00; 95% LOA range, ±5.10 to ±10.99%). In the analyses on intra-examiner repeatability of ROI size, ICCs were rather low (ranging from: 0.03 to 0.69) while 95% LOA was large in all the combinations of vibration frequency and image filter (ranging from: ±62.66 to ±83.33%). In the analyses on intra-observer repeatability of ROI size, ICCs were sufficiently high in the total combination of vibration frequency and image filter (ranging from 0.80 to 0.87) while the 95% LOAs were better (lower) in the bandpass-directional filter than the bandpass filter (bandpass directional filter vs. bandpass filter, ±28.81 vs. ±54.83% at 75 Hz; ±25.63 vs. ±37.83% at 100 Hz; ±34.51 vs. ±43.36% at 125 Hz). In the analyses on intra-examiner and observer repeatability of resolution score, the mean difference (bias) between the two exams (or observations) was significantly low and there was almost no difference across all the combinations of vibration frequency and image filter (range of bias: -0.11-0.11 and -0.17-0.00, respectively). Additionally, effects of vibration frequency and image filter on wave image quality (ROI size and resolution score) were assessed separately in each exam. Both mean ROI size and resolution score in the bandpass-directional filter were larger than those in the bandpass filter. Among the data in the bandpass-directional filter, mean ROI size was larger at 75 and 100 Hz, and mean resolution score was larger at 100 and 125 Hz. Taking into consideration with the results of repeatability and wave image quality, the present results suggest that optimal vibration frequency and image filter for MRE of the supraspinatus muscles is 100 Hz and bandpass-directional filter, respectively.
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Affiliation(s)
- Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Office of Radiation Technology, Keio University Hospital, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan.
| | - Takamichi Ueki
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Tetsushi Habe
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Office of Radiation Technology, Keio University Hospital, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Toshiki Maeno
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Kouichi Takamoto
- Department of Sport and Health Sciences, Faculty of Human Sciences, University of East Asia, 2-1, Ichinomiyagakuen-cho, Shimonoseki-shi, Yamaguchi 751-8503, Japan; System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630, Sugitani, Toyama 930-0194, Japan
| | - Keisuke Igarashi
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Surendra Maharjan
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Kazuyuki Mizuhara
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan; Department of Mechanical Engineering, Tokyo Denki University, 5, Senju Asahicho, Adachi-ku, Tokyo 120-8551, Japan
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630, Sugitani, Toyama 930-0194, Japan
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Sonnenschein V, Tsuji Y, Kokuryu S, Kubo W, Suzuki S, Tomita H, Kiyanagi Y, Iguchi T, Matsushita T, Wada N, Kitaguchi M, Shimizu HM, Hirota K, Shinohara T, Hiroi K, Hayashida H, Guo W, Ito D, Saito Y. An experimental setup for creating and imaging 4He 2 * excimer cluster tracers in superfluid helium-4 via neutron- 3He absorption reaction. Rev Sci Instrum 2020; 91:033318. [PMID: 32259963 DOI: 10.1063/1.5130919] [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] [Received: 10/08/2019] [Accepted: 02/29/2020] [Indexed: 06/11/2023]
Abstract
For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer 4He2 * are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + 3He → 3T + p. This reaction is induced by neutron irradiation of the 3He fraction contained in natural isotopic abundance liquid helium with neutron beams either from the Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility (JPARC)/Materials and Life Science Experimental Facility or from the Kyoto University Institute for Integrated Radiation and Nuclear Science. These 4He2 * clusters are expected to be ideal tracers of the normal-fluid component in superfluid helium with several advantageous properties. Evidence of the excimer generation is inferred by detection of laser induced fluorescence emitted from the 4He2 * clusters excited by a purpose-built short pulse gain-switched titanium:sapphire (Ti:sa) laser operating at a wavelength of 905 nm. The setup and performance characteristics of the laser system including the Ti:sa and two continuous wave re-pumping lasers are described. Detection at the fluorescence wavelength of 640 nm is performed by using optical bandpass filtered photomultiplier tubes (PMT). Electrical noise in the PMT acquisition traces could successfully be suppressed by post-processing with a simple algorithm. Despite other laser-related backgrounds, the excimer was clearly identified by its fluorescence decay characteristics. Production of the excimer was found to be proportional to the neutron flux, adjusted via insertion of different collimators into the neutron beam. These observations suggest that the apparatus we constructed does function in the expected manner and, therefore, has the potential for groundbreaking turbulence research with superfluid helium.
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Affiliation(s)
- V Sonnenschein
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Y Tsuji
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - S Kokuryu
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - W Kubo
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - S Suzuki
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - H Tomita
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Y Kiyanagi
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - T Iguchi
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - T Matsushita
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - N Wada
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - M Kitaguchi
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - H M Shimizu
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hirota
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - T Shinohara
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hiroi
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - H Hayashida
- Comprehensive Research Organization for Science and Society, Tokai, Ibaraki 319-1106, Japan
| | - W Guo
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
| | - D Ito
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - Y Saito
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
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26
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Ito D, Ishikawa C, Jeffery ND, Oshima A, Nakayama T, Kitagawa M. 'T-SLIP' MRI imaging of cerebrospinal fluid flow through the mesencephalic aqueduct. J Small Anim Pract 2020; 61:206-207. [PMID: 31930501 DOI: 10.1111/jsap.13106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/12/2019] [Accepted: 11/25/2019] [Indexed: 11/26/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - A Oshima
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - T Nakayama
- Laboratory of Veterinary Radiology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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27
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Cserne Szappanos H, Ito D, Dixon R, Hool L. 125 Increased Arrhythmic Activity is associated With Altered Ion Channel Expression, Localisation and Function in AMHC403/+ Hypertrophic Hearts. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.132] [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: 10/23/2022]
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28
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Ito D, Kimura Y, Takenaka M, Ouchi M, Terashima T. Single-chain crosslinked polymers via the transesterification of folded polymers: from efficient synthesis to crystallinity control. Polym Chem 2020. [DOI: 10.1039/d0py00758g] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report efficient synthetic systems of single-chain crosslinked polymers via the intramolecular transesterification of folded random copolymers in organic media and the unique crystallization behavior of their crosslinked polymers.
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Affiliation(s)
- Daiki Ito
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Yoshihiko Kimura
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Mikihito Takenaka
- Institute for Chemical Research
- Kyoto University
- Uji
- Japan
- RIKEN Spring-8 Center
| | - Makoto Ouchi
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Takaya Terashima
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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29
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Roy A, Profant J, Morris S, Menno D, Ito D, Epstein J, Bae C. Sodium oxybate prescribing adjustments by physicians in a real world clinical setting. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.921] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Numano T, Habe T, Ito D, Onishi T, Takamoto K, Mizuhara K, Nishijo H, Igarashi K, Ueki T. A new technique for motion encoding gradient-less MR elastography of the psoas major muscle: A gradient-echo type multi-echo sequence. Magn Reson Imaging 2019; 63:85-92. [PMID: 31425804 DOI: 10.1016/j.mri.2019.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 07/29/2019] [Accepted: 08/15/2019] [Indexed: 11/29/2022]
Abstract
The present study aimed to develop vibration techniques for magnetic resonance (MR) elastography (MRE) of the psoas major muscle (PM). Seven healthy volunteers were included. MRE was performed with motion-encoding gradient (MEG)-less multi-echo MRE sequence, which allows clinicians to perform MRE using conventional MR imaging. In order to transmit mechanical vibration of the pneumatic type to the PM, a long narrow vibration pad was designed using a 3D printer, and the optimum vibration techniques were verified. The vibration pad was placed under the lower back, with the volunteers in the supine position. The results indicated that the PM vibrated well through the transmitted vibration from the lumbar spine, which suggests that the placement of a narrow vibration pad under the supine body, along the lumbar spine, allows the vibration of the PM. The shear modulus of the PM (n = 7) was 1.23 ± 0.09 kPa (mean ± SEM) on the right side and 1.22 ± 0.15 kPa on the left side, with no significant difference (t-test, P > 0.05). Increased stiffness of the muscle due to continuous local contraction may be an important cause of non-specific low back pain (LBP). The present vibration techniques for MRE of the PM provide a quantitative diagnostic tool for changes in muscle stiffness associated with non-specific LBP.
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Affiliation(s)
- Tomokazu Numano
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Japan; Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Japan.
| | - Tetsushi Habe
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Japan
| | - Daiki Ito
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Japan; Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Japan; Office of Radiation Technology, Keio University Hospital, Japan
| | - Takaaki Onishi
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Japan
| | - Koichi Takamoto
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Japan
| | | | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Japan
| | - Keisuke Igarashi
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Japan
| | - Takamichi Ueki
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Japan
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31
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Sasaki T, Ito D, Sonoda T, Morita Y, Wakabayashi Y, Yamamura T, Okamura H, Oishi S, Noguchi T, Fujii N, Uenoyama Y, Tsukamura H, Maeda KI, Matsuda F, Ohkura S. Peripheral administration of κ-opioid receptor antagonist stimulates gonadotropin-releasing hormone pulse generator activity in ovariectomized, estrogen-treated female goats. Domest Anim Endocrinol 2019; 68:83-91. [PMID: 30908995 DOI: 10.1016/j.domaniend.2018.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 06/26/2018] [Revised: 11/19/2018] [Accepted: 12/29/2018] [Indexed: 11/26/2022]
Abstract
Pulsatile gonadotropin-releasing hormone (GnRH) secretion is indispensable for reproduction in mammals. Kisspeptin neurons in the hypothalamic arcuate nucleus (ARC), referred to as KNDy neurons because of the coexpression of neurokinin B and dynorphin A, are considered as components of the GnRH pulse generator that produces rhythmic GnRH secretion. The present study aimed to investigate if peripheral administration of PF-4455242, a κ-opioid receptor (KOR, a dynorphin A receptor) antagonist, facilitates pulsatile luteinizing hormone (LH) secretion and GnRH pulse generator activity in estrogen-treated ovariectomized Shiba goats to determine the possibility of using KOR antagonists to artificially control ovarian activities. PF-4455242 was intravenously infused for 4 h (1 or 10 μmol/kg body weight/4 h) or as a single subcutaneous injection (1 or 10 μmol/kg body weight). In a separate experiment, the same KOR antagonist (10 μmol/kg body weight/4 h) was intravenously infused during the recording of multiple unit activity (MUA) in the ARC that reflects the activity of the GnRH pulse generator to test the effects of KOR antagonist administration on GnRH pulse generator activity. Intravenous infusion and single subcutaneous injection of the KOR antagonist significantly increased the frequency of LH pulses compared with controls. Intravenous infusion of KOR antagonist also significantly increased the frequency of episodic bursts in the MUA. The present study demonstrates that peripherally administered KOR antagonist stimulates pulsatile LH secretion by acting on the GnRH pulse generator, and peripheral administration of PF-4455242 can be used to facilitate pulsatile LH secretion, which in turn facilitates ovarian activities in farm animals.
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Affiliation(s)
- T Sasaki
- Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - D Ito
- Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - T Sonoda
- Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Y Morita
- Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Y Wakabayashi
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Tsukuba 305-0901, Japan
| | - T Yamamura
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Tsukuba 305-0901, Japan
| | - H Okamura
- Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Tsukuba 305-0901, Japan
| | - S Oishi
- Laboratory of Bioorganic Medical Chemistry and Chemogenomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - T Noguchi
- Laboratory of Bioorganic Medical Chemistry and Chemogenomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - N Fujii
- Laboratory of Bioorganic Medical Chemistry and Chemogenomics, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Y Uenoyama
- Laboratory of Reproductive Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - H Tsukamura
- Laboratory of Reproductive Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - K I Maeda
- Laboratory of Theriogenology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - F Matsuda
- Laboratory of Theriogenology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - S Ohkura
- Laboratory of Animal Production Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan.
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32
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Tanaka M, Numano T, Habe T, Ito D, Maeno T, Ueki T, Igarashi K, Mizuhara K. [Influence of Vibration Waveform on MR Elastography]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2019; 75:239-246. [PMID: 30890671 DOI: 10.6009/jjrt.2019_jsrt_75.3.239] [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: 06/09/2023]
Abstract
The purpose of this study was to investigate an influence of vibration waveform on magnetic resonance elastography (MRE). MRE is an innovative imaging technique for the non-invasive quantification of the elasticity of soft tissues through the direct visualization of propagating shear waves in vivo using a special phase-contrast magnetic resonance imaging sequence. Since the elasticity of soft tissue calculates from the wavelength of propagating shear waves, it is necessary to propagate sine-wave-shape shear wave at the target soft tissue. However, due to the various factors; i.e. overload of vibration generator, poor contact between imaging object and vibration pad, etc.; it may be difficult to generate a simple sine wave. This work was focused on change vibration waveforms; i.e. square wave, triangle wave, saw-tooth wave; which is induced by the various factors. Phantom experimental results demonstrated that when square and saw-tooth waveforms of 25 Hz vibration frequency, into the phantom, the waveform of propagating wave was not similar to sine waveform. It may influence on the MRE that in case of the waveforms has low frequency and square or saw-tooth like waveforms.
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Affiliation(s)
- Michitaka Tanaka
- Department of Radiological Sciences, Faculty of Health Sciences, Tokyo Metropolitan University (Current address: Department of Radiology, Dokkyo Medical University Saitama Medical Center)
| | - Tomokazu Numano
- Department of Radiological Sciences, Faculty of Health Sciences, Tokyo Metropolitan University
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Tetsushi Habe
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Toshiki Maeno
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Takamichi Ueki
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Keisuke Igarashi
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Kazuyuki Mizuhara
- Department of Mechanical Engineering, School of Engineering, Tokyo Denki University
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33
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Yamada M, Kimura Y, Ishiyama D, Nishio N, Otobe Y, Tanaka T, Ohji S, Koyama S, Sato A, Suzuki M, Ogawa H, Ichikawa T, Ito D, Arai H. Phase Angle Is a Useful indicator for Muscle Function in Older Adults. J Nutr Health Aging 2019; 23:251-255. [PMID: 30820513 DOI: 10.1007/s12603-018-1151-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [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: 12/14/2022]
Abstract
AIM Phase angle (PhA) can be determined through bioelectrical impedance analysis and is a unique variable for skeletal muscle. The objective of this study was to evaluate the relationship between PhA and muscle mass/quality in older adults. In addition, we attempted to determine the cutoff value of PhA for poor muscle function. METHODS Community-dwelling Japanese older men (n=285, 81.1±7.1 years) and women (n=724, 80.4±6.8 years) participated in this study and were classified into four groups based on the Asian Working Group for Sarcopenia (normal, presarcopenia, dynapenia, and sarcopenia). We measured PhA using bioelectrical impedance analysis, muscle quantity and quality indicators using ultrasonography, muscle strength, and physical performance and compared them in four groups. We also tried to determine the cutoff value of PhA for poor muscle function. RESULTS We found a significant difference in PhA among the four groups in men (P<0.05), and the dynapenia (3.61±0.75°) and sarcopenia groups (3.40±0.74°) showed significantly lower values than the normal group (4.50±0.86°) (P<0.05), but not the presarcopenia group (4.12±0.85°). In women, a significant difference was also observed among the four groups (P<0.05), and the dynapenia (3.41±0.65°) and sarcopenia groups (3.31±0.66°) showed significantly lower measures than the normal group (4.14±0.71°) (P<0.05), but not the presarcopenia group (4.07±0.51°). The receiver-operating characteristic curve analysis indicated the best cutoff value of PhA (men: 4.05°, women: 3.55°) to discriminate sarcopenia and dynapenia from normal and presarcopenia. CONCLUSION These findings suggest that PhA is a useful indicator for muscle function.
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Affiliation(s)
- M Yamada
- Minoru Yamada, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, JapanTel: +81-3-3942-6863, Fax: +81-3-3942-6895, Email address:
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Kimura Y, Yamada M, Ishiyama D, Nishio N, Kunieda Y, Koyama S, Sato A, Otobe Y, Ohji S, Suzuki M, Ogawa H, Ito D, Ichikawa T, Hamanaka K, Tanaka N, Muroh Y. Impact of unilateral spatial neglect with or without other cognitive impairments on independent gait recovery in stroke survivors. J Rehabil Med 2019; 51:26-31. [DOI: 10.2340/16501977-2503] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Ito D, Numano T, Takamoto K, Ueki T, Habe T, Igarashi K, Mizuhara K, Nishijo H. Simultaneous acquisition of magnetic resonance elastography of the supraspinatus and the trapezius muscles. Magn Reson Imaging 2018; 57:95-102. [PMID: 30465866 DOI: 10.1016/j.mri.2018.11.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/21/2018] [Accepted: 11/17/2018] [Indexed: 01/13/2023]
Abstract
We developed a Magnetic Resonance elastography (MRE) technique using a conventional magnetic resonance imaging (MRI), which allows a simultaneous elastography of the supraspinatus and trapezius muscles, by designing a new wave transducer (vibration pad) and optimizing the mechanical vibration frequency. Five healthy volunteers underwent an MRE. In order to transmit the mechanical vibration (pneumatic vibration) to the supraspinatus and trapezius muscles, a new vibration pad was designed using a three-dimensional (3D) printer. The vibration pad was placed on the skin 2 cm medial and 2 cm cephalad the deltoid tubercle. MRE acquisition was performed with a multi-slice gradient-echo type multi-echo MR sequence, which allows MREs even in a conventional MRI; two oblique axial images of the supraspinatus and trapezius muscles were obtained simultaneously. Vibration frequencies were set at 50-150 Hz, with a 25 Hz step. Wave image quality in each frequency was analyzed using a phase-to-noise ratio (PNR) and clarity of propagating wave that was assessed by two readers qualitatively. In the supraspinatus muscle, the wave images were of good quality especially at frequencies >75 Hz. In the trapezius muscle, the wave images were of better quality at low frequencies (50 and 75 Hz) compared with high frequencies (100-150 Hz). The PNR of both muscles were higher at low frequencies. The mean stiffness in the trapezius muscle (7.26 ± 2.13 kPa at 75 Hz) was larger than those in the supraspinatus muscle (4.16 ± 0.50 kPa at 75 Hz). The results demonstrated that our MRE technique allows simultaneous assessment of the stiffness in the supraspinatus and trapezius muscles using a conventional MRI, and that optimal vibration frequency for simultaneous MRE of these muscles is 75 Hz. This technique provides a new means for early detection of abnormality in the shoulder.
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Affiliation(s)
- Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Office of Radiation Technology, Keio University Hospital, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan.
| | - Koichi Takamoto
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani 2630, Toyama 930-0194, Japan
| | - Takamichi Ueki
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Tetsushi Habe
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Keisuke Igarashi
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan
| | - Kazuyuki Mizuhara
- Department of Mechanical Engineering, Tokyo Denki University, 5, Senju Asahicho, Adachi-ku, Tokyo 120-8551, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani 2630, Toyama 930-0194, Japan
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Itaya Y, Ito D, Kobayashi N, Tsubai Y. Heat Transfer of Insulator Panels in Outdoor Examination of Modeled Henhouse. KAGAKU KOGAKU RONBUN 2018. [DOI: 10.1252/kakoronbunshu.44.308] [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: 11/11/2022]
Affiliation(s)
- Yoshinori Itaya
- Environmental and Renewable Energy System Division, Gifu University
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Ito D, Numano T, Mizuhara K, Washio T, Misawa M, Nitta N. Development of a robust diffusion-MR elastography (dMRE) technique to mitigate intravoxel phase dispersion. Magn Reson Imaging 2018; 54:160-170. [PMID: 30171999 DOI: 10.1016/j.mri.2018.08.016] [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] [Received: 01/25/2018] [Revised: 08/21/2018] [Accepted: 08/27/2018] [Indexed: 10/28/2022]
Abstract
Diffusion-magnetic resonance elastography (dMRE) is an emerging practical technique that can acquire diffusion magnetic resonance imaging and MRE simultaneously. However, a signal loss attributable to intravoxel phase dispersion (IVPD) interferes with the calculation of the apparent diffusion coefficient (ADC). This study presents an approach to dMRE that reduces the influence of IVPD by introducing a new pulse sequence. The existing and proposed techniques were performed using a phantom comprising five rods with different elasticities at 60 Hz vibration to investigate the accuracy of previous and proposed dMRE techniques. The measures of ADC and stiffness, obtained by using both dMRE techniques, were compared with conventional spin-echo (SE) diffusion and SE-MRE. Then, we evaluated those differences by using the mean of absolute differences (MAD) in each rod within the phantom. The results of the MAD of the stiffness from both dMRE techniques showed almost no difference. In contrast, the value of the ADC MAD (MAD ≒ 0.16 × 10-3 mm2/s), obtained in the soft region within the phantom with the previous dMRE technique, was large. This value was about 2.7 times that of the value produced by the proposed dMRE technique. This difference must reflect the degree of influence of IVPD in both techniques. These results demonstrate that our dMRE technique is a robust method for addressing the signal loss attributable to IVPD.
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Affiliation(s)
- Daiki Ito
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan; Office of Radiation Technology, Keio University Hospital, Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Tomokazu Numano
- Department of Radiological Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 7-2-10, Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan.
| | - Kazuyuki Mizuhara
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan; Department of Mechanical Engineering, Tokyo Denki University, 5, Senju Asahicho, Adachi-ku, Tokyo 120-8551, Japan
| | - Toshikatsu Washio
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Masaki Misawa
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Naotaka Nitta
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1, Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
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Ito D, Ogura Y, Sawamoto M, Terashima T. Acrylate-Selective Transesterification of Methacrylate/Acrylate Copolymers: Postfunctionalization with Common Acrylates and Alcohols. ACS Macro Lett 2018; 7:997-1002. [PMID: 35650952 DOI: 10.1021/acsmacrolett.8b00502] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Acrylate-selective transesterification of methacrylate/acrylate copolymers with alcohols was developed for a site-selective postfunctionalization technique of polymers without using specific monomers. Importantly, a common methyl acrylate efficiently works as a selective modification unit via transesterification coupled with a titanium alkoxide catalyst. The acrylate-selective transesterification is achieved owing to less steric hindrance of the carbonyl groups that are attached to the main chain without an α-methyl group. Typically, the acrylate pendants of dodecyl methacrylate/methyl acrylate (MA) random copolymers were selectively transesterified with benzyl alcohol (BzOH). The conversion of the pendent esters into benzyl esters proportionally increased with MA contents. Additionally, various alcohols were applicable to this MA-selective transesterification system.
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Affiliation(s)
- Daiki Ito
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yusuke Ogura
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Institute of Science and Technology Research, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Takaya Terashima
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Iwai M, Ito D, Asano H, Adachi S, Okada K, Kimura M, Usami E, Matsuo K, Yoshimura T, Teramachi H. Evaluation of the safety of ramucirumab in Japanese patients with advanced gastric cancer. Pharmazie 2018; 73:309-312. [PMID: 29724300 DOI: 10.1691/ph.2018.7355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
As a result of the RAINBOW trial, ramucirumab plus paclitaxel was established as a second-line treatment of advanced gastric cancer. Regarding the safety of ramucirumab plus paclitaxel in the Japanese, a subgroup analysis of the RAINBOW trial was conducted. The incidence of neutropenia was higher in Japanese patients. However, information is lacking concerning the safety of ramucirumab after marketing in Japanese patients. Therefore, the aim of this study was to evaluate the safety of ramucirumab in Japanese patients with advanced gastric cancer. The inclusion criteria were patients diagnosed with advanced gastric cancer who had commenced treatment with ramucirumab plus paclitaxel or paclitaxel only at Ogaki Municipal Hospital (Gifu, Japan) between January 2015 and December 2016. There were 26 patients in the ramucirumab plus paclitaxel group and 22 patients in the paclitaxel only group. Treatment-related adverse events were documented in 100.0% of the patients in the ramucirumab plus paclitaxel group (Grade 3-4, 73.1%) and 90.9 % of the patients in the paclitaxel only group (Grade 3-4, 45.5 %). The most frequently observed adverse event in both treatment groups was anemia. The second common adverse event was neutropenia. The incidence of neutropenia of Grade ≥3 was significantly higher in the ramucirumab plus paclitaxel group than in the paclitaxel only group. In conclusion, the incidence of neutropenia is high. However, we believe that ramucirumab plus paclitaxel can be safely administered.
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Ohkusu-Tsukada K, Ito D, Takahashi K. The Role of Proteasome Inhibitor MG132 in 2,4-Dinitrofluorobenzene-Induced Atopic Dermatitis in NC/Nga Mice. Int Arch Allergy Immunol 2018; 176:91-100. [PMID: 29669333 DOI: 10.1159/000488155] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 03/05/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Although immunosuppressants for therapy of atopic dermatitis (AD) are still being sought, proteasome inhibitors are also potential candidates for the treatment of AD. Proteasome inhibitors exert various effects by blocking proteasomal degradation and help regulate processes such as apoptosis induction via caspase-9, cell cycle progression via cyclins, NF-κB inactivation via IκB, and downregulation of antigen cross-presentation. The cells targeted by proteasome inhibitors are therefore activated cells undergoing proliferation or differentiation, and antigen-presenting cells carrying out protein degradation. OBJECTIVES This study investigated the therapeutic effects and side effects of a proteasome inhibitor, MG132, on the treatment of AD. METHODS AD-like disease in NC/Nga mice housed under specific pathogen-free conditions was induced by repeated application of 2,4-dinitrofluorobenzene (DNFB). Disease progression was evaluated by inflammation score, histopathology, and serum IgE level, and the effects of systemic MG132 administration were investigated. The percentages and absolute numbers for each population of Th1, Th2, and Th17 cells in the axillary lymph nodes were analyzed by flow cytometry. RESULTS DNFB application increased the expression of a unique major histocompatibility complex class I mutant molecule D/Ldm7 in dendritic cells (DCs), and increased Th1 and Th17 cells in NC/Nga mice. In vivo MG132 administration to NC/Nga mice with DNFB-induced dermatitis reduced Th17 cells but maintained the level of Th1 cells, resulting in the alleviation of dermatitis lesions by decreasing both serum IgE hyperproduction and mast cell migration. To understand the mechanisms maintaining Th1 cell levels following in vivo MG132-administration, we focused on the role of proteasomes regulating D/Ldm7 expression. Interestingly, 20S proteasome activity was higher in NC/Nga DCs than in BALB/c DCs. In vitro MG132 administration partially increased D/Ldm7 expression in a dose-dependent manner during DC maturation, and induced IFN-γ production from autoreactive CD8+ T cells but not from CD4+ T cells following coculturing with D/Ldm7-upregulated DCs. CONCLUSION Although MG132 administration temporarily alleviated AD pathogenesis in NC/Nga mice, prolonged MG132 treatment may result in immunopathogenesis leading to chronic AD due to its side effect of maintaining Th1 levels via autoreactive CD8+ T cells.
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Ito D, Ishikawa C, Jeffery ND, Ono K, Tsuboi M, Uchida K, Yamato O, Kitagawa M. Two-Year Follow-Up Magnetic Resonance Imaging and Spectroscopy Findings and Cerebrospinal Fluid Analysis of a Dog with Sandhoff's Disease. J Vet Intern Med 2018; 32:797-804. [PMID: 29478290 PMCID: PMC5867010 DOI: 10.1111/jvim.15041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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] [Received: 11/06/2017] [Revised: 12/07/2017] [Accepted: 12/14/2017] [Indexed: 11/30/2022] Open
Abstract
A 13‐month‐old female Toy Poodle was presented for progressive ataxia and intention tremors of head movement. The diagnosis of Sandhoff's disease (GM2 gangliosidosis) was confirmed by deficient β‐N‐acetylhexosaminidase A and B activity in circulating leukocytes and identification of the homozygous mutation (HEXB: c.283delG). White matter in the cerebrum and cerebellum was hyperintense on T2‐weighted and fluid‐attenuated inversion recovery magnetic resonance images. Over the next 2 years, the white matter lesions expanded, and bilateral lesions appeared in the cerebellum and thalamus, associated with clinical deterioration. Magnetic resonance spectroscopy showed progressive decrease in brain N‐acetylaspartate, and glycine‐myo‐inositol and lactate‐alanine were increased in the terminal clinical stage. The concentrations of myelin basic protein and neuron specific enolase in cerebrospinal fluid were persistently increased. Imaging and spectroscopic appearance correlated with histopathological findings of severe myelin loss in cerebral and cerebellar white matter and destruction of the majority of cerebral and cerebellar neurons.
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Affiliation(s)
- D Ito
- School of Veterinary Medicine, Nihon University, Kanagawa, Japan
| | - C Ishikawa
- School of Veterinary Medicine, Nihon University, Kanagawa, Japan
| | - N D Jeffery
- Veterinary Medicine and Biomedical Sciences, Texas A&M University, TX
| | - K Ono
- School of Veterinary Medicine, Nihon University, Kanagawa, Japan
| | - M Tsuboi
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - K Uchida
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - O Yamato
- Laboratory of Clinical Pathology of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - M Kitagawa
- School of Veterinary Medicine, Nihon University, Kanagawa, Japan
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Yamada M, Kimura Y, Ishiyama D, Nishio N, Tanaka T, Ohji S, Otobe Y, Koyama S, Sato A, Suzuki M, Ogawa H, Ichikawa T, Ito D, Arai H. Plasma Amino Acid Concentrations Are Associated with Muscle Function in Older Japanese Women. J Nutr Health Aging 2018; 22:819-823. [PMID: 30080226 DOI: 10.1007/s12603-018-1014-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 02/07/2023]
Abstract
BACKGROUND Although several previous studies have found benefits for amino acid supplementation in terms of muscle function, the role of plasma amino acid concentrations on sarcopenia are not well addressed yet. OBJECTIVE The aim of this study was to compare the amino acid concentrations at each stage of sarcopenia (normal, pre-sarcopenia, dynapenia, and sarcopenia) in community-dwelling older Japanese adults. SETTING AND SUBJECTS Community-dwelling older Japanese women (n=232, 79.4±7.0 years) participated in this study. MEASUREMENTS We measured plasma amino acid concentrations, 5-m walking speed, grip strength, and skeletal muscle mass using a bioelectrical impedance data acquisition system and compared them among participants at each stage of sarcopenia. RESULTS The proportions of normal, pre-sarcopenia, dynapenia, and sarcopenia patients were 40.5% (n=94), 12.1% (n=28), 26.3% (n=61), and 21.1% (n=49), respectively. Significant differences were observed for concentrations of leucine, branched-chain amino acid (BCAAs), and essential amino acid (EAAs) among the four groups (p<0.05), and the dynapenia and sarcopenia groups showed significantly lower concentrations of leucine than the normal group (p<0.05). CONCLUSIONS This study indicated a positive relationship between plasma leucine, BCAA and EAA concentrations and muscle function. A longitudinal study is needed to determine the causal relationship between leucine/BCAA concentrations and muscle function.
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Affiliation(s)
- M Yamada
- Minoru Yamada, PT, PhD, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo 112-0012, Japan, Tel.: +81-3-3942-6863, Fax: +81-3-3942-6895, E-mail address:
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Niibori M, Ito D, Kamada M. Real-time web-cast system by multihop WebRTC communications. IJGUC 2018. [DOI: 10.1504/ijguc.2018.10016124] [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: 11/21/2022]
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Yamada S, Hashizume A, Hijikata Y, Inagaki T, Ito D, Nakamura T, Katsuno M. The impact of cold exposure in spinal and bulbar muscular atrophy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3058] [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: 11/27/2022]
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Itagaki H, Koshino T, Ito T, Sano T, Ito D, Sugimura H. Volume Phase Transition of Chemically Cross-linked Curdlan Hydrogels Dependent on pH. ACS Biomater Sci Eng 2016; 2:752-757. [DOI: 10.1021/acsbiomaterials.5b00503] [Citation(s) in RCA: 4] [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: 11/28/2022]
Affiliation(s)
- Hideyuki Itagaki
- Department of Chemistry, Graduate School of Science and Technology, and ‡Department of
Chemistry, School of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Takatsugu Koshino
- Department of Chemistry, Graduate School of Science and Technology, and ‡Department of
Chemistry, School of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Taiki Ito
- Department of Chemistry, Graduate School of Science and Technology, and ‡Department of
Chemistry, School of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Takumi Sano
- Department of Chemistry, Graduate School of Science and Technology, and ‡Department of
Chemistry, School of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Daiki Ito
- Department of Chemistry, Graduate School of Science and Technology, and ‡Department of
Chemistry, School of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Haruki Sugimura
- Department of Chemistry, Graduate School of Science and Technology, and ‡Department of
Chemistry, School of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
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Kimura M, Go M, Iwai M, Ito D, Asano H, Usami E, Teramachi H, Yoshimura T. Safety of an oral anticancer agent (trifluridine/tipiracil combination tablet) in patients with advanced and recurrent colorectal cancer. Pharmazie 2016; 71:218-221. [PMID: 27209703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We retrospectively studied the safety of trifluridine/tipiracil combination tablet (TAS-102) monotherapy in patients with advanced and recurrent colorectal cancer. Adverse events to TAS-102 monotherapy were observed in 22 out of 23 cases (95.7%). The most frequent adverse events were neutropenia (69.6%), nausea (53.2%), and malaise (30.4%). Treatment was postponed in 54 (59.3%) out of 91 courses, and in 34 (66.7%) of these 54 courses, the delay in treatment was due to bone marrow suppression. Seven patients with peritoneal metastases suffered from nausea, whilst none of the patients without peritoneal metastases had nausea (p = 0.0139). Nausea and vomiting during a previous chemotherapy cycle was significantly associated with nausea after TAS-102 treatment (p = 0.0007), and the treatment cycles were significantly longer in patients with grade 3 or 4 neutropenia (p = 0.0061). Our results suggest that the incidence of nausea was higher in patients treated with TAS-102. Therefore, it is important to inform patients of the risk of these toxicities and to provide enhanced supportive care. Moreover, we recommend that, for patients with repeated treatment postponement due to neutropenia, the dosage should be fixed based on therapeutic efficacy and prognosis.
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Ito D, Numano T, Mizuhara K, Takamoto K, Onishi T, Nishijo H. [The Development of Vibration System for Applying Magnetic Resonance Elastography (MRE) to the Supraspinatus Muscle]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2016; 72:1222-1229. [PMID: 28003609 DOI: 10.6009/jjrt.2016_jsrt_72.12.1222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Palpation is a standard clinical tool to diagnose abnormal stiffness changes in soft tissues. However, it is difficult to palpate the supraspinatus muscle because it locates under the trapezius muscle. The magnetic resonance elastography (MRE) uses harmonic mechanical excitation to quantitatively measure the stiffness (shear modulus) of both the superficial and deep tissues. The purpose of this study was to build a vibration system for applying the MRE to the supraspinatus muscle. In this study, a power amplifier and a pneumatic pressure generator were used to supply vibrations to a vibration pad. Six healthy volunteers underwent MRE. We investigated the effects of position (the head of the humerus and the trapezius muscle) of the vibration pad on the patterns of wave propagation (wave image). When the vibration pad was placed in the trapezius muscle, the wave images represented clear wave propagation. On the other hand, when the vibration pad was placed in the head of the humerus, the wave images represented unclear wave propagation. This result might be caused by wave interferences resulting from the vibrations from bones and an intramuscular tendon of the supraspinatus muscle. The mean shear modulus also was 8.12 ± 1.83 (mean ± SD) kPa, when the vibration pad was placed in the trapezius muscle. Our results demonstrated that the vibration pad should be placed in the trapezius muscle in the MRE of the supraspinatus muscle.
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Affiliation(s)
- Daiki Ito
- Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University
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49
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Kamada K, Ito D, Soh N. Visible-Light-Induced Activity Control of Peroxidase Bound to Fe-Doped Titanate Nanosheets with Nanometric Lateral Dimensions. Bioconjug Chem 2015; 26:2161-6. [DOI: 10.1021/acs.bioconjchem.5b00464] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kai Kamada
- Department
of Chemistry and Materials Engineering, Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan
| | - Daiki Ito
- Department
of Chemistry and Materials Engineering, Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan
| | - Nobuaki Soh
- Faculty
of Agriculture, Saga University, Saga 840-8502, Japan
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50
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Oladapo AO, Epstein JD, Williams E, Ito D, Gringeri A, Valentino LA. Health-related quality of life assessment in haemophilia patients on prophylaxis therapy: a systematic review of results from prospective clinical trials. Haemophilia 2015; 21:e344-58. [DOI: 10.1111/hae.12759] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2015] [Indexed: 01/06/2023]
Affiliation(s)
| | | | | | - D. Ito
- Baxalta US Inc; Cambridge MA USA
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