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Matsumura T, Hashimoto H, Sekimizu M, Saito A, Asakura M, Kimura K, Iwata Y. VP.59 A single-arm, open-label, multicenter study of tranilast for advanced heart failure in patients with muscular dystrophy. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.253] [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: 11/07/2022]
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2
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Okumura N, Koizumi I, Iwata Y, Yoneya S, Koba R, Kondo H, Shibuya H. Cutaneous papilloma and multicentric squamous cell carcinoma in four-toed hedgehogs (Atelerix albiventris). J Vet Med Sci 2021; 83:1726-1729. [PMID: 34544958 PMCID: PMC8636867 DOI: 10.1292/jvms.21-0302] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Skin lesions possibly caused by Papillomavirus infections in two four-toed hedgehogs are described. In case 1, there was a papillary mass on the right hind limb. Histologically, the mass
was consistent with a viral papilloma. In the other case, multifocal papillary masses with erosions and ulcers were found throughout the body, mainly on the extremities. Histology showed
continuative lesions composed of acanthosis, Bowenoid in situ carcinoma, and squamous cell carcinoma, with abrupt transitions between the lesions. In both cases,
keratinocytes in the granular layer infrequently had features of koilocytes and intranuclear inclusion bodies, and immunohistochemical staining was positive for anti-human papillomavirus
antibody. To the best of the authors’ knowledge, this is the first pathological documentation of possibly papillomavirus-associated skin lesions in four-toed hedgehogs.
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Affiliation(s)
- Naka Okumura
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Iori Koizumi
- Koizumi Nest Animal Hospital, 3-24 Betto, Yahata Nishi, Kitakyushu, Fukuoka 806-0062, Japan
| | - Yuki Iwata
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Shion Yoneya
- Laboratory of Veterinary Microbiology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Ryota Koba
- Laboratory of Veterinary Microbiology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Hirotaka Kondo
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Hisashi Shibuya
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
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3
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Tanaka Y, Iwata Y, Saito K, Fukushima H, Watanabe S, Hasegawa Y, Akiyama M, Sugiura K. Cutaneous ischemia-reperfusion injury is exacerbated by IL-36 receptor antagonist deficiency. J Eur Acad Dermatol Venereol 2021; 36:295-304. [PMID: 34699104 DOI: 10.1111/jdv.17767] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/26/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND Loss-of-function homozygous or compound heterozygous mutations in IL36RN, which encodes interleukin-36 receptor antagonist (IL-36Ra), has been implicated in the pathogenesis of skin disorders. However, the pathogenic role of IL-36Ra in cutaneous ischemia-reperfusion (I/R) injury remains unclear. OBJECTIVES We investigated the role of IL36Ra in cutaneous I/R injury. METHODS We examined I/R injury in Il36rn-/- mice. The area of wounds, numbers of infiltrated cells, apoptotic cells and neutrophil extracellular trap (NET) formation were assessed. The expression levels of various genes were analysed using real-time RT-PCR. The expression of high mobility group box 1 (HMGB1), an endogenous toll-like receptor (TLR) 4 ligand, was confirmed using immunohistology, and serum HMGB1 levels were measured by ELISA. Cytokine production by stimulated cultured J774A.1 and HaCaT cells was examined. RESULTS IL-36Ra deficiency resulted in significantly delayed wound healing and increased neutrophil and macrophage infiltration into the wound tissues. Il36rn-/- mice had increased mRNA expression levels of CXCL1, CXCL2, CCL4, TNF-α, TGF-β, IL-1β, IL-6 and IL-36γ relative to wild-type mice. Apoptosis was identified in keratinocytes by TUNEL assay. HMGB1 expression in the I/R site was decreased in both keratinocytes and adnexal cells, while serum HMGB1 levels were significantly elevated after reperfusion. The mRNA levels of various cytokines, including IL-1β, were elevated in J774A.1 cells through TLR4 signalling by HMGB1 stimulation. In addition, HaCaT cells stimulated with IL-1β showed significantly increased CXCL1, TNF-α, IL-6, IL-36β and IL-36γ mRNA expression. Furthermore, NET formation was increased by IL-36Ra deficiency. Finally, either the blockade of TLR4 signalling by TAK-242 or inhibition of NET formation by Cl-amidine normalized exacerbated I/R injury in Il36rn-/- mice. CONCLUSIONS This study indicated that IL-36Ra deficiency exacerbates cutaneous I/R injury due to excessive inflammatory cell recruitment, NET formation, and excessive cytokine and chemokine production via the TLR4 pathway by HMGB1 released from epidermal apoptotic cells.
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Affiliation(s)
- Y Tanaka
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Y Iwata
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - K Saito
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Fukushima
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - S Watanabe
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Y Hasegawa
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - M Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Sugiura
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
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4
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Aoyama Y, Inagaki S, Aoshima K, Iwata Y, Nakamura S, Hara H, Shimazawa M. Involvement of endoplasmic reticulum stress in rotenone-induced leber hereditary optic neuropathy model and the discovery of new therapeutic agents. J Pharmacol Sci 2021; 147:200-207. [PMID: 34384568 DOI: 10.1016/j.jphs.2021.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 02/07/2021] [Revised: 06/15/2021] [Accepted: 07/05/2021] [Indexed: 11/18/2022] Open
Abstract
Leber hereditary optic neuropathy (LHON) is caused by mitochondrial DNA mutations and is the most common inherited mitochondrial disease. It is responsible for central vision loss in young adulthood. However, the precise mechanisms of onset are unknown. This study aimed to elucidate the mechanisms underlying LHON pathology and to discover new therapeutic agents. First, we assessed whether rotenone, a mitochondrial complex Ⅰ inhibitor, induced retinal degeneration such as that in LHON in a mouse model. Rotenone decreased the thickness of the inner retina and increased the expression levels of 8-hydroxy-2'-deoxyguanosine (8-OHdG) and immunoglobulin heavy-chain binding protein (BiP). Second, we assessed whether rotenone reproduces LHON pathologies on RGC-5, a neural progenitor cell derived from the retina. Rotenone increased the cell death rate, ROS production and the expression levels of ER stress markers. During chemical compounds screening, we used anti-oxidative compounds, ER stress inhibitors and anti-inflammatory compounds in a rotenone-induced in vitro model. We found that SUN N8075, an ER stress inhibitor, reduced mitochondrial ROS production and improved the mitochondrial membrane potential. Consequently, the ER stress response is strongly related to the pathologies of LHON, and ER stress inhibitors may have a protective effect against LHON.
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MESH Headings
- Aniline Compounds/pharmacology
- Animals
- Cells, Cultured
- DNA, Mitochondrial/genetics
- Disease Models, Animal
- Drug Discovery
- Drug Evaluation, Preclinical
- Endoplasmic Reticulum Stress/drug effects
- Endoplasmic Reticulum Stress/genetics
- Endoplasmic Reticulum Stress/physiology
- Male
- Membrane Potential, Mitochondrial/drug effects
- Membrane Potential, Mitochondrial/genetics
- Mice, Inbred C57BL
- Molecular Targeted Therapy
- Mutation
- Optic Atrophy, Hereditary, Leber/chemically induced
- Optic Atrophy, Hereditary, Leber/drug therapy
- Optic Atrophy, Hereditary, Leber/genetics
- Optic Atrophy, Hereditary, Leber/pathology
- Piperazines/pharmacology
- Reactive Oxygen Species/metabolism
- Retina/drug effects
- Retina/metabolism
- Retina/pathology
- Retinal Degeneration/chemically induced
- Retinal Degeneration/genetics
- Retinal Degeneration/pathology
- Rotenone/adverse effects
- Mice
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Affiliation(s)
- Yakumo Aoyama
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Satoshi Inagaki
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Kota Aoshima
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Yuki Iwata
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Shinsuke Nakamura
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Masamitsu Shimazawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan.
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5
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Morozumi W, Aoshima K, Inagaki S, Iwata Y, Nakamura S, Hara H, Shimazawa M. Piezo 1 is involved in intraocular pressure regulation. J Pharmacol Sci 2021; 147:211-221. [PMID: 34217619 DOI: 10.1016/j.jphs.2021.06.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 02/02/2021] [Revised: 05/28/2021] [Accepted: 06/09/2021] [Indexed: 01/02/2023] Open
Abstract
Trabecular meshwork (TM) regulates the intraocular pressure (IOP) through the control of aqueous humor outflow. Previous reports show that TM cells express 11 types of mechanosensitive molecules, including Piezo 1, which sense mechanical stimuli. However, the role of Piezo 1 on TM remains unclear. Thus, in this study, we focused on the Piezo 1 and examined its role in TM cells. Immunostaining showed that Piezo 1 was expressed in mouse TM and human TM cells. Moreover, the eye drops containing Piezo 1 agonist Yoda 1 reduced the IOP in mice, and also reduced fibronectin expression level around the TM. In addition, Piezo 1 activation suppressed human TM cells migration/proliferation, and decreased fibronectin expression level. On the other hand, Piezo 1 activation increased matrix metalloproteinase (MMP)-2 expression responsible for fibronectin degradation. These findings could contribute to the development of new treatments for glaucoma.
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Affiliation(s)
- Wataru Morozumi
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Kota Aoshima
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Satoshi Inagaki
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Yuki Iwata
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Shinsuke Nakamura
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Masamitsu Shimazawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan.
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6
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Iwata Y, Thanh HT, Sun G, Ishibashi K. High Accuracy Heartbeat Detection from CW-Doppler Radar Using Singular Value Decomposition and Matched Filter. Sensors (Basel) 2021; 21:s21113588. [PMID: 34064145 PMCID: PMC8196719 DOI: 10.3390/s21113588] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/04/2021] [Accepted: 05/18/2021] [Indexed: 11/22/2022]
Abstract
Heart rate measurement using a continuous wave Doppler radar sensor (CW-DRS) has been applied to cases where non-contact detection is required, such as the monitoring of vital signs in home healthcare. However, as a CW-DRS measures the speed of movement of the chest surface, which comprises cardiac and respiratory signals by body motion, extracting cardiac information from the superimposed signal is difficult. Therefore, it is challenging to extract cardiac information from superimposed signals. Herein, we propose a novel method based on a matched filter to solve this problem. The method comprises two processes: adaptive generation of a template via singular value decomposition of a trajectory matrix formed from the measurement signals, and reconstruction by convolution of the generated template and measurement signals. The method is validated using a dataset obtained in two different experiments, i.e., experiments involving supine and seated subject postures. Absolute errors in heart rate and standard deviation of heartbeat interval with references were calculated as 1.93±1.76bpm and 57.0±28.1s for the lying posture, and 9.72±7.86bpm and 81.3±24.3s for the sitting posture.
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Affiliation(s)
- Yuki Iwata
- Graduate School of Informatics and Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan; (G.S.); (K.I.)
- Correspondence:
| | - Han Trong Thanh
- School of Electronics and Telecommunications, Hanoi University of Science and Technology (HUST), Hanoi 100000, Vietnam;
| | - Guanghao Sun
- Graduate School of Informatics and Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan; (G.S.); (K.I.)
| | - Koichiro Ishibashi
- Graduate School of Informatics and Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan; (G.S.); (K.I.)
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Abstract
An 8-year-and-1-month-old female blue tegu (Salvator merianae) was
brought to a clinician with severe cough. The patient died 11 days later despite
supportive care, and necropsy was performed by a clinician. The lumen of the distal
trachea was almost completely occluded by a milk-white, hard mass measuring 1 cm in
diameter. Histopathologically, the mass comprised spindle-shaped to polygonal cells
arranged in a loose sheet with abundant production of basophilic cartilaginous matrix,
consistent with chondrosarcoma. Reports of tracheal neoplasms in reptiles are limited, and
to the best of our knowledge this represents the first pathological documentation of
tracheal chondrosarcoma in a reptile.
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Affiliation(s)
- Yuki Iwata
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Hirotaka Kondo
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Iori Koizumi
- Koizumi Nest Animal Hospital, 3-24 Bettou, Yahata Nishi, Kitakyushu, Fukuoka 806-0062, Japan
| | - Hisashi Shibuya
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
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8
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Iwata Y, Inagaki S, Morozumi W, Nakamura S, Hara H, Shimazawa M. Treatment with GDF15, a TGFβ superfamily protein, induces protective effect on retinal ganglion cells. Exp Eye Res 2020; 202:108338. [PMID: 33157126 DOI: 10.1016/j.exer.2020.108338] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 10/12/2020] [Accepted: 10/24/2020] [Indexed: 10/23/2022]
Abstract
Growth differentiation factor 15 (GDF15) is a protein belonging to the transforming growth factor beta (TGF-β) superfamily. The precursor GDF15 is cleaved and activated as a mature GDF15 by protease. GDF15 has been detected in the aqueous humor of the primary open angle glaucoma patients, however the localization and the effect on the retinal ganglion cells (RGCs) are still unknown. Thus, the purpose of this study was to elucidate the effect of GDF15 on mouse optic nerve crush (ONC) model and primary culture of rat RGCs. Immunostaining showed that the GDF15 was in the ganglion cell layer (GCL), and colocalized with GFAP-positive cells in the GCL and the optic nerve. Western blotting analysis showed that the mature GDF15 was upregulated in the retina and the optic nerve after the ONC. Intravitreal injection of GDF15 suppressed RGCs loss of the ONC model mice in vivo. The neurites length of the primary culture of rat RGCs were increased by mature GDF15 treatment. In addition, the neurotrophic effect of GDF15 was canceled by RET inhibitor treatment. These findings indicate that GDF15 has neuroprotective effect on RGCs via GFRAL-RET pathway. Therefore, GDF15 may be one of novel therapeutic targets in RGC degenerative diseases.
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Affiliation(s)
- Yuki Iwata
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Satoshi Inagaki
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Wataru Morozumi
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Shinsuke Nakamura
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Masamitsu Shimazawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan.
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9
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Fukuzawa S, Fukuzawa S, Okino S, Ishiwaki H, Iwata Y, Kuroiwa N, Uchiyama T, Shibayama N. Cardiac amyloidosis in patients undergoing aortic valve replacement for aortic stenosis. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Transthyretin cardiac amyloidosis (ATTR) has been increasingly recognized in patients with degenerative aortic stenosis (AS). In some reports, the uptake of Tc-99m labeled bone radiotracers in cardiac amyloidosis has been documented. Tc-99m pyrophosphate (PYP) scintigraphy in the absence of evidence of a monoclonal gammopathy was diagnostic for transthyretin cardiac amyloidosis, providing a cost-effective and non-invasive technique with a specificity and positive predictive value of nearly 100%. We sought to determine the prevalence of ATTR as detected by the bone scan tracer among the patients with severe AS requiring surgical valve replacement.
Methods
We retrospectively analyzed clinical and echocardiographical data for 44 patients with severe AS requiring surgical valve replacement between Jan. 2009 and Dec. 2016. All eligible patients were offered Tc-99m PYP scintigraphy. Retention of Tc-99m PYP in the heart was assessed using both a semiquantitative visual score (range, 0 [no uptake] to 3 [uptake greater than bone]). Positive uptake was defined score 2 and 3.
Results
Myocardial deposition of Tc-99m PYP (Score 2–3) was identified in 4 of 44 patients (9%), all >70 years and 75% male. Patients with myocardial deposition of the tracer were older (78±8 years vs. 70±12 years), and had more mean interventricular septum thickness (18±3 mm vs. 14±5 mm). Both groups had at least ejection fraction and abnormal global longitudinal strain with no significant difference between groups. Pre-operative serum median NT-pro BNP level was similar between two groups, but post-operative improvement of NT-pro BNP was larger in non-deposition of the tracer group. During the post operative follow-up, survival was significantly worse if patients had amyloid deposition compared with no deposition subjects (25% vs. 7.5%).
Conclusion
Incidental transthyretin cardiac amyroidosis had a prevelance of 9% among patients undergoing surgical aortic valve replacement and was associated with a poor outcome.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - H Ishiwaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Shibayama
- Funabashi Municipal Medical Center, Funabashi, Japan
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10
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Iwata Y, Ishibashi K, Sun G, Luu MH, Han TT, Nguyen LT, Do TT. Contactless Heartbeat Detection from CW-Doppler Radar using Windowed-Singular Spectrum Analysis .. Annu Int Conf IEEE Eng Med Biol Soc 2020; 2020:477-480. [PMID: 33018031 DOI: 10.1109/embc44109.2020.9175441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The continuous-wave Doppler radar measures the movement of a chest surface including of cardiac and breathing signals and the body movement. The challenges associated with extracting cardiac information in the presence of respiration and body movement have not been addressed thus far. This paper presents a novel method based on the windowed-singular spectrum analysis (WSSA) for solving this issue. The algorithm consists of two processes: signal decomposition via WSSA followed by the reconstruction of decomposed heartbeat signals through convolution. An experiment was conducted to collect chest signals in 212 people by Doppler radar. In order to confirm the effect of reducing the large noise by the proposed method, we evaluated 136 signals that were considered to contain respiration body movements from the collected signals. When comparing to the performance of a band-pass filter, the proposed analysis achieves improved beat count accuracy. The results indicate its applicability to contactless heartbeat estimation under involving respiration and body movements.
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11
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Maseki H, Kinoshita T, Matsui A, Iwata Y, Harada H, Sasahara M, Ichimura Y, Murata Y, Urakami S, Seki S, Oishi T, Isobe Y. The effect of Scalp-Cooling System on the prevention of alopecia after chemotherapy. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)30666-3] [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: 11/16/2022]
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12
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Nishiuchi M, Sakaki H, Dover NP, Miyahara T, Shiokawa K, Manabe S, Miyatake T, Kondo K, Kondo K, Iwata Y, Watanabe Y, Kondo K. Ion species discrimination method by linear energy transfer measurement in Fujifilm BAS-SR imaging plate. Rev Sci Instrum 2020; 91:093305. [PMID: 33003787 DOI: 10.1063/5.0016515] [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: 06/05/2020] [Accepted: 09/04/2020] [Indexed: 06/11/2023]
Abstract
We have developed a novel discrimination methodology to identify ions in multispecies beams with similar charge-to-mass ratios, but different atomic numbers. After an initial separation by charge-to-mass ratios using co-linear electric and magnetic fields, individual ions can be discriminated by considering the linear energy transfer of ions irradiating a stimulable phosphor plate (Fujifilm imaging plate) by comparison with the Monte Carlo calculation. We apply the method to energetic multispecies laser-driven ion beams and use it to identify silver ions produced by the interaction between a high contrast, high intensity laser pulse; and a sub-micrometer silver foil target. We also show that this method can be used to calibrate the imaging plate for arbitrary ion species in the range of Z ≥ 6 with dE/dx > 0.1 MeV/μm without requiring individual calibration.
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Affiliation(s)
- M Nishiuchi
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - H Sakaki
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - N P Dover
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - T Miyahara
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - K Shiokawa
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - S Manabe
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - T Miyatake
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - Ko Kondo
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
| | - Ke Kondo
- Research Group for Radiation Materials Engineering, Nuclear Science and Engineering Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai-mura, Ibaraki 319-1195, Japan
| | - Y Iwata
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - Y Watanabe
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Ki Kondo
- Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
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13
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Mizushima K, Iwata Y, Muramatsu M, Lee SH, Shirai T. Experimental study on monitoring system of clinical beam purity in multiple-ion beam operation for heavy-ion radiotherapy. Rev Sci Instrum 2020; 91:023309. [PMID: 32113412 DOI: 10.1063/1.5127537] [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] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
The National Institute of Radiological Sciences has investigated multiple-ion therapy using energetic beams of helium, carbon, oxygen, and neon ions, to improve treatment outcomes of refractory cancer. For this therapy, it is necessary to ensure the helium-ion beam purity to avoid irradiation by unwanted ions. Here, we develop a measurement method for monitoring beam purity. This method can measure the charge number of the ions in a high-purity beam using an ionization chamber and Faraday cup. In addition, it can be used to detect the contamination of the clinical helium-ion beam. We perform beam experiments to evaluate our beam-purity monitoring method and predict that our method is capable of detecting contamination below 1%.
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Affiliation(s)
- K Mizushima
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Y Iwata
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - M Muramatsu
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - S H Lee
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - T Shirai
- Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
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14
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Morozumi W, Inagaki S, Iwata Y, Nakamura S, Hara H, Shimazawa M. Piezo channel plays a part in retinal ganglion cell damage. Exp Eye Res 2019; 191:107900. [PMID: 31874142 DOI: 10.1016/j.exer.2019.107900] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/27/2019] [Accepted: 12/20/2019] [Indexed: 01/09/2023]
Abstract
Piezo channel is one of the mechanosensitive channels that senses pressure and shearing stress. Previous reports show that Piezo channel is expressed in many tissues such as skin and lung and they have many important roles. In addition, the mRNA of Piezo has been detected in astrocytes in the optic nerve head of mice. However, it is not yet clear where Piezo channel localize in eye and what kind of effects it have. Thus, the purpose of this study was to determine the expression sites of Piezo channel in mouse eyes and effect of Piezo channel on retinal ganglion cells. Immunostaining analysis showed that the Piezo 1/2 were expressed in the cornea, trabecular meshwork of the anterior ocular segment, lens epithelial cells, and on the retinal ganglion cell layer. The expression of retinal Piezo 2 was increased in retinal disorder model mouse caused by high IOP. Piezo 1 agonist Yoda 1 suppressed neurite outgrowth in retinal ganglion cells. On the other hand, Piezo antagonist GsMTx4 promoted neurite outgrowth in retinal ganglion cells. These findings indicate that Piezo channel may contribute to diseases relating the IOP such as glaucoma.
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Affiliation(s)
- Wataru Morozumi
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Satoshi Inagaki
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Yuki Iwata
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Shinsuke Nakamura
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan
| | - Masamitsu Shimazawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan.
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15
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Fukuzawa S, Okino S, Ishiwaki H, Iwata Y, Uchiyama T, Kuroiwa N, Oka M, Furihata S, Shibayama N, Inagaki M. P2725Transthyretin cardiac amyloidosis in heart failure with preserved ejection fraction: Imaging by Tc-99m bone scan. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.1042] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Heart failure with preserved ejection fraction (HFpEF) is a heterogeneous clinical syndrome with multiple underlying causes. Transthyretin amyloidosis (ATTR) is an underdiagnosed cause of HFpEF. Extraosseous uptake, in particular, myocardial uptake, was observed in a number of ATTR patients examined with the bone scan tracers.
Objectives
We sought to determine the prevalence of ATTR as detected by the bone scan among the patients admitted due to HFpEF.
Methods
We screened all consecutive patients ≥60 years old admitted due to HFpEF (left ventricular ejection fraction ≥50%). All eligible patients were offered an echocardiogram and a bone scan (a 99mTc-DPD/MDP/HMDP scintigraphy). Echocardiographic and clinical variables were gathered in all the subjects. The intensity of the myocardial uptake was graded according to a visual scale ranging from 0 to 3 points, in which the absence of uptake was assigned a score of 0 points; uptake less than that of bone (referred to as the adjacent rib), 1 point; uptake similar to that of bone, 2 points; and uptake greater than that of bone, 3 points. The distribution of the uptake in myocardium was defined as focal uptake, diffuse uptake, uptake in a ventricular wall segment, diffuse ventricular uptake, or diffuse biventricular uptake.
Results
The study included 62 HFpEF patients (52% women, 73±9 years). The bone scintigraphic analysis revealed relatively intense myocardial uptake in 7 of 62 patients (11.2%). 7 patients had intense Tc-99m uptake (score of 2–3) in the cardiac region, showing deposition in both right and left ventricles in every case. Patients with amyloid deposition were older (78±6 vs. 70±12 years, p<0.05), had a lower systolic blood pressure (118±23 vs. 148±28 mmHg, p<0.05), and left ventricular ejection fraction (52±11 vs. 58±6%, p<0.05). Both groups had at least moderate left ventricular hypertrophy and abnormal global longitudinal strain with no significant difference between groups. In 6 all the cases, the final diagnosis of amyloidosis was based on the results of abdominal fat aspiration biopsy.
Conclusion
ATTR is an underdiagnosed disease that accounts for a significant number (11.2%) of HFpEF cases. These findings create an opportunity for further investigation in the targeted therapy of patients with HFpEF.
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Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - H Ishiwaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Oka
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Furihata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Shibayama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Inagaki
- Funabashi Municipal Medical Center, Funabashi, Japan
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16
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Fukuzawa S, Okino S, Ishiwaki H, Iwata Y, Uchiyama T, Kuroiwa N, Oka M, Furuhata S, Shibayama N, Inagaki M. 29Cardiac amyloidosis revealed by bone scintigraphy in heart failure with preserved ejection fraction. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez142.005] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - H Ishiwaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Oka
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Furuhata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Shibayama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Inagaki
- Funabashi Municipal Medical Center, Funabashi, Japan
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17
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Fukuzawa S, Okino S, Iwata Y, Kuroiwa N, Uchiyama T, Inagaki M. P4701The elusive role of myocardial perfusion imaging for the patients with insufficient fractional flow reserve after drug eluting stent implantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4701] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Inagaki
- Funabashi Municipal Medical Center, Funabashi, Japan
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18
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Iwata Y, Tanaka Y, Kubosaki S, Morita T, Yoshimi Y. A strategy for generating aryl radicals from arylborates through organic photoredox catalysis: photo-Meerwein type arylation of electron-deficient alkenes. Chem Commun (Camb) 2018; 54:1257-1260. [DOI: 10.1039/c7cc09140k] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Generation of a variety of aryl radicals from arylboronic acids through metal-free photoredox catalysis under mild conditions.
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Affiliation(s)
- Y. Iwata
- Department of Applied Chemistry and Biotechnology
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Y. Tanaka
- Department of Applied Chemistry and Biotechnology
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - S. Kubosaki
- Department of Applied Chemistry and Biotechnology
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - T. Morita
- Department of Applied Chemistry and Biotechnology
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
| | - Y. Yoshimi
- Department of Applied Chemistry and Biotechnology
- Graduate School of Engineering
- University of Fukui
- Fukui 910-8507
- Japan
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19
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Fukuzawa S, Okino S, Kuroiwa N, Iwata Y, Uchiyama T, Yamanaka K, Inagaki M. 4779Myocardial uptake of bone scintigraphic agents associated with cardiac amyloidosis in daily practice. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.4779] [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: 11/14/2022] Open
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20
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Takayama S, Koyanagi K, Miyazaki H, Takami S, Orikasa T, Ishii Y, Kurusu T, Iwata Y, Noda K, Obana T, Suzuki K, Ogitsu T, Amemiya N. Design and Test Results of Superconducting Magnet for Heavy-Ion Rotating Gantry. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/871/1/012083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Heilbronn L, Zeitlin CJ, Iwata Y, Murakami T, Nakamura T, Yonai S, Ronningen RM, Iwase H. Neutron-Production Yields from 400 MeV/Nucleon Iron Stopping in Carbon, Aluminum, Copper, and Lead Targets. NUCL SCI ENG 2017. [DOI: 10.13182/nse10-112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- L. Heilbronn
- University of Tennessee, 214 Pasqua Engineering Building Knoxville, Tennessee 37996
| | - C. J. Zeitlin
- Southwest Research Institute, 1050 Walnut Street, Boulder, Colorado 80302
| | - Y. Iwata
- National Institute of Radiological Sciences, Department of Accelerator Physics and Engineering 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - T. Murakami
- National Institute of Radiological Sciences, Department of Accelerator Physics and Engineering 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - T. Nakamura
- Tohoku University, Cyclotron and Radioisotope Center Aoba, Aramaki, Sendai 980-8578, Japan
| | - S. Yonai
- Tohoku University, Cyclotron and Radioisotope Center Aoba, Aramaki, Sendai 980-8578, Japan
| | - R. M. Ronningen
- Michigan State University, National Superconducting Cyclotron Laboratory East Lansing, Michigan 48824-1321
| | - H. Iwase
- KEK, Radiation Science Center, Oho 1, Tsukuba 305-0801, Japan
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22
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Heilbronn L, Zeitlin CJ, Iwata Y, Murakami T, Iwase H, Nakamura T, Nunomiya T, Sato H, Yashima H, Ronningen RM, Ieki K. Secondary Neutron-Production Cross Sections from Heavy-Ion Interactions between 230 and 600 MeV/Nucleon. NUCL SCI ENG 2017. [DOI: 10.13182/nse07-a2719] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- L. Heilbronn
- Lawrence Berkeley National Laboratory, MS 74-197, Berkeley, California 94720
| | - C. J. Zeitlin
- Lawrence Berkeley National Laboratory, MS 74-197, Berkeley, California 94720
| | - Y. Iwata
- National Institute of Radiological Sciences, Department of Accelerator Physics and Engineering 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - T. Murakami
- National Institute of Radiological Sciences, Department of Accelerator Physics and Engineering 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - H. Iwase
- Tohoku University, Cyclotron and Radioisotope Center, Aoba, Aramaki, Sendai 980-8578, Japan
| | - T. Nakamura
- Tohoku University, Cyclotron and Radioisotope Center, Aoba, Aramaki, Sendai 980-8578, Japan
| | - T. Nunomiya
- Tohoku University, Cyclotron and Radioisotope Center, Aoba, Aramaki, Sendai 980-8578, Japan
| | - H. Sato
- Tohoku University, Cyclotron and Radioisotope Center, Aoba, Aramaki, Sendai 980-8578, Japan
| | - H. Yashima
- Tohoku University, Cyclotron and Radioisotope Center, Aoba, Aramaki, Sendai 980-8578, Japan
| | - R. M. Ronningen
- Michigan State University, National Superconducting Cyclotron Laboratory East Lansing, Michigan 48824-1321
| | - K. Ieki
- Rikkyo University, Department of Physics, 3-34-1 Nishi Ikebukuro Toshima, Tokyo 171-8501, Japan
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23
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Iwata Y, Kobayashi T, Kuroda M, Mizoguchi Y, Arima M, Numata S, Watanabe S, Yagami A, Matsunaga K, Sugiura K. Case report of multiple pustules of the bilateral lower limbs caused by a granulocyte colony-stimulating factor-producing solid pseudopapillary tumour of the pancreas. Br J Dermatol 2016; 177:1122-1126. [PMID: 27925156 DOI: 10.1111/bjd.15219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/23/2016] [Indexed: 11/29/2022]
Abstract
Here we report a rare case of neutrophilic dermatoses related to a granulocyte colony-stimulating factor (G-CSF)-producing solid pseudopapillary tumour (SPT). The patient was a 39-year-old woman presenting with scattered pustules and crusts of the palms, heels and thighs and plaques of the bilateral lower legs. The skin biopsy revealed dense neutrophil infiltration in the epidermis to the dermis. A pancreatic head tumour was detected using computed tomography. A pathological examination of the resected specimen suggested an SPT. As the skin eruption promptly disappeared after SPT resection, we hypothesized that SPT secretes growth factors including epidermal growth factor (EGF) and G-CSF. The SPT cells stained positive for both EGF and G-CSF tumour cells. The serum levels of interleukin (IL)-6 and IL-10 and tumour necrosis factor-α were within normal limits before and after the SPT resection. In contrast, the serum IL-8, EGF and G-CSF levels decreased after the SPT resection. This is a rare case of neutrophilic dermatoses related to a G-CSF-producing SPT. The present case suggests that physicians should be aware that a G-CSF-producing tumour is a differential diagnosis to consider in patients with unusual aseptic pustulosis.
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Affiliation(s)
- Y Iwata
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - T Kobayashi
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - M Kuroda
- Department of Diagnostic Pathology and, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Y Mizoguchi
- Department of Integrative Medical Science for Allergic Disease, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - M Arima
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - S Numata
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - S Watanabe
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - A Yagami
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - K Matsunaga
- Department of Diagnostic Pathology, Nishichita General Hospital, Tokai, Aichi, 477-8522, Japan
| | - K Sugiura
- Department of Dermatology, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
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24
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Nishikawa H, Enomoto H, Iwata Y, Kishino K, Shimono Y, Hasegawa K, Nakano C, Takata R, Nishimura T, Yoh K, Ishii A, Aizawa N, Sakai Y, Ikeda N, Takashima T, Iijima H, Nishiguchi S. Serum Wisteria floribunda agglutinin-positive Mac-2-binding protein for patients with chronic hepatitis B and C: a comparative study. J Viral Hepat 2016; 23:977-984. [PMID: 27476460 DOI: 10.1111/jvh.12575] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 07/07/2016] [Indexed: 12/12/2022]
Abstract
We compared Wisteria floribunda agglutinin-positive Mac-2-binding protein (WFA+ -M2BP) levels between patients with chronic hepatitis B (n=249) and chronic hepatitis C (n=386) based on the degree of liver fibrosis. We examined WFA+ -M2BP levels in patients with F4 (cirrhosis), F3 or more (advanced fibrosis) and F2 or more (significant fibrosis) in the two groups. We further examined the relationship between five fibrosis markers and the degree of fibrosis. The WFA+ -M2BP values ranged from 0.25 cut-off index (COI) to 12.9 COI in patients with hepatitis B and 0.34-20.0 COI in patients with hepatitis C (P<.0001). The median WFA+ -M2BP values in F4 in the two groups were 2.83 COI in patients with hepatitis B and 5.03 COI in patients with hepatitis C (P=.0046). The median WFA+ -M2BP values in F3 or more in the two groups were 1.79 COI in patients with hepatitis B and 3.79 COI in patients with hepatitis C (P<.0001). The median WFA+ -M2BP values in F2 or more in the two groups were 1.49 COI in the hepatitis B cohort and 3.19 COI in the hepatitis C group (P<.0001). Among five liver fibrosis markers, WFA+ -M2BP had the highest correlation coefficient (rs =.629) in terms of correlation with the degree of fibrosis in the patients with hepatitis C and had the second highest rs value (.415) in the hepatitis B group. Although WFA+ -M2BP could be a useful indicator of liver fibrosis, WFA+ -M2BP levels in the two groups significantly differed even in the same degree of fibrosis. Individual cut-off values in each aetiology for the degree of fibrosis should be determined.
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Affiliation(s)
- H Nishikawa
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - H Enomoto
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - Y Iwata
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - K Kishino
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - Y Shimono
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - K Hasegawa
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - C Nakano
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - R Takata
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - T Nishimura
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - K Yoh
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - A Ishii
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - N Aizawa
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - Y Sakai
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - N Ikeda
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - T Takashima
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - H Iijima
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
| | - S Nishiguchi
- Division of Hepatobiliary and Pancreatic Disease, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
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25
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Iwata Y, Shimizu N, Otsuka T, Utsuno Y, Menéndez J, Honma M, Abe T. Erratum: Large-Scale Shell-Model Analysis of the Neutrinoless ββ Decay of ^{48}Ca [Phys. Rev. Lett. 116, 112502 (2016)]. Phys Rev Lett 2016; 117:179902. [PMID: 27824452 DOI: 10.1103/physrevlett.117.179902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Indexed: 06/06/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.116.112502.
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26
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Matsumura T, Matsui M, Iwata Y, Asakura M, Saito T, Fujimura H, Sakoda S. TRPV2 inhibition therapy can be effective for cardiomyopathy of muscular dystrophy. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.429] [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: 10/21/2022]
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27
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Abstract
We conducted a retrospective review of 11 patients with bilateral Kienböck’s disease from our series of 251 patients with Kienböck’s disease. There were no significant differences in radiographic parameters, including ulnar variance and carpal bone angle, between those with unilateral and those with bilateral Kienböck’s disease. None of the patients with bilateral disease had been treated with corticosteroids or had a systemic disease that predisposed to osteonecrosis. Thus, this study failed to demonstrate any risk factor for bilateral, as opposed to unilateral Kienböck’s disease.
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Affiliation(s)
- N Yazaki
- Department of Hand Surgery, Graduate School of Medicine, Nagoya University, Nagoya, Japan.
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28
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Takahashi K, Suzuki M, Iwata Y, Shigeta S, Yamanishi K, De Clercq E. Selective Activity of Various Nucleoside and Nucleotide Analogues against Human Herpesvirus 6 and 7. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029700800102] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We have developed a new sensitive enzyme immunoassay (EIA) and MTT (tetrazolium salt) assay for screening compounds against two variants of human herpesvirus 6 (HHV-6A, HHV-6B) and human herpesvirus 7 (HHV-7) and evaluated the anti-HHV-6 and HHV-7 activity of a series of anti-herpesvirus compounds and acyclic nucleoside phosphonate analogues. The results indicate that the pattern of activity of these compounds against these betaherpesviruses is similar to that for human cytomegalovirus (HCMV). The highest potency and selectivity against the two variants of HHV-6 and HHV-7 was demonstrated by S2242 (N7-isomer of 6-deoxy-ganciclovir). Also, ganciclovir (GCV), foscarnet, (phosphonoformic acid; PFA) and the acyclic nucleoside phosphonate analogues such as cidofovir (HPMPC) exhibited selective inhibitory activity against these viruses. Thymidine kinase (TK)-dependent drugs (acyclovir, ACV; brivudin, BVDU; and sorivudine, BVaraU) showed little, if any, activity. These results suggest a structural homology of the DNA polymerase and a lack of TK gene among these three betaherpesviruses (HHV-6, HHV-7 and HCMV). The finding that HHV-7 was highly sensitive to GCV also suggests that HHV-7 may have an HCMV-UL97-homologue gene for the phosphorylation of GCV. The present EIA method is more rapid and sensitive than the previously reported procedures and could be useful for the large-scale screening of compounds against HHV-6 and HHV-7.
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Affiliation(s)
- K Takahashi
- Department of Microbiology, Fukushima Medical College, 1 Hikarigaoka, Fukushima, 960-1 2, Japan
| | - M Suzuki
- Department of Microbiology, Fukushima Medical College, 1 Hikarigaoka, Fukushima, 960-1 2, Japan
| | - Y Iwata
- Department of Microbiology, Fukushima Medical College, 1 Hikarigaoka, Fukushima, 960-1 2, Japan
| | - S Shigeta
- Department of Microbiology, Fukushima Medical College, 1 Hikarigaoka, Fukushima, 960-1 2, Japan
| | - K Yamanishi
- Department of Microbiology, Osaka University School of Medicine, Osaka, Japan
| | - E De Clercq
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium
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Abstract
This study reports a novel stress radiography technique to evaluate an avulsion fracture at the lateral malleolus in children. Radiographs in the stress anteroposterior view or the Haraguchi calcaneofibular ligament or anterior tarofibular ligament (ATFL) projection could not detect any fracture; only manual inversion stress radiography in the Haraguchi ATFL projection could identify the avulsion fracture.
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Affiliation(s)
- Y Iwata
- Iwata Orthopedics and Rheumatology Clinic, Japan
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30
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Iwata Y, Shimizu N, Otsuka T, Utsuno Y, Menéndez J, Honma M, Abe T. Large-Scale Shell-Model Analysis of the Neutrinoless ββ Decay of ^{48}Ca. Phys Rev Lett 2016; 116:112502. [PMID: 27035297 DOI: 10.1103/physrevlett.116.112502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Indexed: 06/05/2023]
Abstract
We present the nuclear matrix element for the neutrinoless double-beta decay of ^{48}Ca based on large-scale shell-model calculations including two harmonic oscillator shells (sd and pf shells). The excitation spectra of ^{48}Ca and ^{48}Ti, and the two-neutrino double-beta decay of ^{48}Ca are reproduced in good agreement to the experimental data. We find that the neutrinoless double-beta decay nuclear matrix element is enhanced by about 30% compared to pf-shell calculations. This reduces the decay lifetime by almost a factor of 2. The matrix-element increase is mostly due to pairing correlations associated with cross-shell sd-pf excitations. We also investigate possible implications for heavier neutrinoless double-beta decay candidates.
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Affiliation(s)
- Y Iwata
- Center for Nuclear Study, The University of Tokyo, 113-0033 Tokyo, Japan
| | - N Shimizu
- Center for Nuclear Study, The University of Tokyo, 113-0033 Tokyo, Japan
| | - T Otsuka
- Center for Nuclear Study, The University of Tokyo, 113-0033 Tokyo, Japan
- Department of Physics, The University of Tokyo, 113-0033 Tokyo, Japan
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | - Y Utsuno
- Center for Nuclear Study, The University of Tokyo, 113-0033 Tokyo, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, 319-1195 Ibaraki, Japan
| | - J Menéndez
- Department of Physics, The University of Tokyo, 113-0033 Tokyo, Japan
| | - M Honma
- Center for Mathematical Sciences, University of Aizu, 965-8580 Fukushima, Japan
| | - T Abe
- Department of Physics, The University of Tokyo, 113-0033 Tokyo, Japan
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31
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Muramatsu M, Hojo S, Iwata Y, Katagiri K, Sakamoto Y, Takahashi N, Sasaki N, Fukushima K, Takahashi K, Suzuki T, Sasano T, Uchida T, Yoshida Y, Hagino S, Nishiokada T, Kato Y, Kitagawa A. Development of a compact ECR ion source for various ion production. Rev Sci Instrum 2016; 87:02C110. [PMID: 26932120 DOI: 10.1063/1.4935221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
There is a desire that a carbon-ion radiotherapy facility will produce various ion species for fundamental research. Although the present Kei2-type ion sources are dedicated for the carbon-ion production, a future ion source is expected that could provide: (1) carbon-ion production for medical use, (2) various ions with a charge-to-mass ratio of 1/3 for the existing Linac injector, and (3) low cost for modification. A prototype compact electron cyclotron resonance (ECR) ion source, named Kei3, based on the Kei series has been developed to correspond to the Kei2 type and to produce these various ions at the National Institute of Radiological Sciences (NIRS). The Kei3 has an outer diameter of 280 mm and a length of 1120 mm. The magnetic field is formed by the same permanent magnet as Kei2. The movable extraction electrode has been installed in order to optimize the beam extraction with various current densities. The gas-injection side of the vacuum chamber has enough space for an oven system. We measured dependence of microwave frequency, extraction voltage, and puller position. Charge state distributions of helium, carbon, nitrogen, oxygen, and neon were also measured.
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Affiliation(s)
- M Muramatsu
- National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - S Hojo
- National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - Y Iwata
- National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - K Katagiri
- National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - Y Sakamoto
- National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
| | - N Takahashi
- Sumitomo Heavy Industries, Ltd., 19 Natsushima, Yokosuka, Kanagawa 237-8555, Japan
| | - N Sasaki
- Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan
| | - K Fukushima
- Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan
| | - K Takahashi
- Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan
| | - T Suzuki
- Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan
| | - T Sasano
- Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan
| | - T Uchida
- Bio-Nano Electronics Research Centre, Toyo University, 2100 Kujirai, Kawagoe-shi, Saitama 350-8585, Japan
| | - Y Yoshida
- Bio-Nano Electronics Research Centre, Toyo University, 2100 Kujirai, Kawagoe-shi, Saitama 350-8585, Japan
| | - S Hagino
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan
| | - T Nishiokada
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan
| | - Y Kato
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan
| | - A Kitagawa
- National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan
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Ishikura T, Iwata Y, Hatano T, Yamato T. Energy exchange network of inter-residue interactions within a thermally fluctuating protein molecule: A computational study. J Comput Chem 2015; 36:1709-18. [PMID: 26147235 DOI: 10.1002/jcc.23989] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [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: 02/25/2015] [Revised: 05/25/2015] [Accepted: 06/09/2015] [Indexed: 12/14/2022]
Abstract
Protein function is regulated not only by the structure but also by physical dynamics and thermal fluctuations. We have developed the computer program, CURrent calculation for proteins (CURP), for the flow analysis of physical quantities within thermally fluctuating protein media. The CURP program was used to calculate the energy flow within the third PDZ domain of the neuronal protein PSD-95, and the results were used to illustrate the energy exchange network of inter-residue interactions based on atomistic molecular dynamics simulations. The removal of the α3 helix is known to decrease ligand affinity by 21-fold without changing the overall protein structure; nevertheless, we demonstrated that the helix constitutes an essential part of the network graph.
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Affiliation(s)
- Takakazu Ishikura
- Graduate School of Science, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku Nagoya, 464-8602, Japan
| | - Yuki Iwata
- Graduate School of Science, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku Nagoya, 464-8602, Japan
| | - Tatsuro Hatano
- Graduate School of Science, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku Nagoya, 464-8602, Japan
| | - Takahisa Yamato
- Graduate School of Science, Division of Material Science, Nagoya University, Furo-cho, Chikusa-ku Nagoya, 464-8602, Japan
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33
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Suga K, Kanzaki H, Fukushima S, Iwata Y, Inoue K, Urayama I. Effects of wearing insoles on biomechanical injury risks for patients who have undergone ACL reconstruction: emphasizing the sagittal plane. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1418] [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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34
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Sekiya A, Kodera M, Yamaoka T, Iwata Y, Usuda T, Ohzono A, Yasukochi A, Koga H, Ishii N, Hashimoto T. A case of lichen planus pemphigoides with autoantibodies to the NC16a and C-terminal domains of BP180 and to desmoglein-1. Br J Dermatol 2014; 171:1230-5. [PMID: 24813536 DOI: 10.1111/bjd.13097] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2014] [Indexed: 11/29/2022]
Abstract
Lichen planus pemphigoides (LPP) is a rare autoimmune blistering disease that occurs in association with lichen planus (LP). This report describes a 59-year-old Japanese female patient with LPP. The patient first showed LP lesions on her hands, and subsequently developed bullae on her extremities and erosions of the oral mucosa. The patient's serum was positive for IgG autoantibodies against the BP180 NC16a domain, the BP180 C-terminal domain and desmoglein-1. However, a serum sampled one and a half years before the diagnosis of LPP was negative for autoantibodies against BP180 NC16a and BP180 C-terminal domains. These findings strongly suggest that the damage to the basal cells in the LP lesions exposed a sequestered antigen or formed neoantigens, leading to the production of pathogenic autoantibodies for LPP. Most of the previous cases of LPP have produced autoantibodies to the NC16a domain of BP180. This is the first case in which autoantibodies to the C-terminal domain of BP180 were detected. The oral mucosal symptoms in this case may have been caused by autoantibodies to the BP180 C-terminal domain.
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Affiliation(s)
- A Sekiya
- Department of Dermatology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Syouwa-ku, Nagoya, Aichi, 4668550, Japan
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35
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Nishio S, Kohno Y, Iwata Y, Arai M, Okumura H, Oshima K, Nadano D, Matsuda T. Glycosylated Chicken ZP2 Accumulates in the Egg Coat of Immature Oocytes and Remains Localized to the Germinal Disc Region of Mature Eggs1. Biol Reprod 2014; 91:107. [DOI: 10.1095/biolreprod.114.119826] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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36
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Iwata Y, Fujimoto Y, Miura K, Harada J, Miyayama T, Morino T, Sugimoto K, Kadohira T, Kobayashi Y. No harmful effect of stem cell mobilization by granulocyte-colony stimulating factor on non-culprit coronary plaques after sirolimus-eluting stent implantation. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1252] [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: 11/13/2022] Open
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37
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Sakakibara M, Deura C, Minabe S, Iwata Y, Uenoyama Y, Maeda KI, Tsukamura H. Different critical perinatal periods and hypothalamic sites of oestradiol action in the defeminisation of luteinising hormone surge and lordosis capacity in the rat. J Neuroendocrinol 2013; 25:251-9. [PMID: 22994299 DOI: 10.1111/j.1365-2826.2012.02389.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Revised: 08/22/2012] [Accepted: 09/16/2012] [Indexed: 11/28/2022]
Abstract
Female rats show a gonadotrophin-releasing hormone (GnRH)/luteinising hormone (LH) surge in the presence of a preovulatory level of oestrogen, whereas males do not because of brain defeminisation during the developmental period by perinatal oestrogen converted from androgen. The present study aimed to identify the site(s) of oestrogen action and the critical period for defeminising the mechanism regulating the GnRH/LH surge. Animals given perinatal treatments, such as steroidal manipulations, brain local implantation of oestradiol (E(2) ) or administration of an NMDA antagonist, were examined for their ability to show an E(2) -induced LH surge at adulthood. Lordosis behaviour was examined to compare the mechanisms defeminising the GnRH/LH surge and sexual behaviour. A single s.c. oestradiol-benzoate administration on either the day before birth (E21), the day of birth (D0) or day 5 (D5) postpartum completely abolished the E(2) -induced LH surge at adulthood in female rats, although the same treatment did not inhibit lordosis. Perinatal castration on E21 or D0 partially rescued the E2-induced LH surge in genetically male rats, whereas castration from E21 to D5 totally rescued lordosis. Neonatal E(2) implantation in the anterior hypothalamus including the anteroventral periventricular nucleus (AVPV)/preoptic area (POA) abolished the E(2) -induced LH surge in female rats, whereas E(2) implantation in the mid and posterior hypothalamic regions had no inhibitory effect on the LH surge. Lordosis was not affected by neonatal E(2) implantation in any hypothalamic regions. In male rats, neonatal NMDA antagonist treatment rescued lordosis but not the LH surge. Taken together, these results suggest that an anterior hypothalamic region such as the AVPV/POA region is a perinatal site of oestrogen action where the GnRH/LH regulating system is defeminised to abolish the oestrogen-induced surge. The mechanism for defeminisation of the GnRH/LH surge system might be different from that of sexual behaviour, in terms of the site(s) of oestrogen action and critical period, as well as the neurotransmitter system involved.
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Affiliation(s)
- M Sakakibara
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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38
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Matsuda F, Torii Y, Enomoto H, Kuga C, Aizawa N, Iwata Y, Saito M, Imanishi H, Shimomura S, Nakamura H, Tanaka H, Iijima H, Tsutsui H, Tanaka Y, Nishiguchi S. Anti-interferon-α neutralizing antibody is associated with nonresponse to pegylated interferon-α plus ribavirin in chronic hepatitis C. J Viral Hepat 2012; 19:694-703. [PMID: 22967100 DOI: 10.1111/j.1365-2893.2012.01598.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pegylated interferon-α (PEG-IFN-α) plus ribavirin (RBV) treatment fails to achieve a sustained virological response (SVR) in approximately 20-50% of patients with chronic hepatitis C virus (HCV) infection. We assessed the contribution of an anti-IFN-α neutralizing antibody (NAb) on the nonresponse to treatment. NAbs were detected using an antiviral assay that assessed the neutralizing effects of serum samples against IFN. Serum samples were obtained at the end of the treatment and evaluated for the presence of NAbs using recombinant IFN-α as a standard. We studied 129 PEG-IFN-α/RBV-treated patients. In the 82 end-of-treatment responders, no NAbs were detected. Of the 47 patients who did not respond, seven (15%) were positive for NAbs. We also examined an additional 83 patients who had not responded to PEG-IFN-α treatment, and detected 12 with NAbs. Patients with good IFN-responsive characteristics, including HCV genotype 2/3 and major allele homozygotes for interleukin-28B, were included in the 19 patients with NAbs. No NAbs interfered with the antiviral activity of natural human IFN-β (nIFN-β) and re-treatement of patients with NAbs with nIFN-β/RBV achieved SVR. Our analyses revealed that the emergence of anti-IFN-α NAbs was a candidate causal factor of PEG-IFN-α-treatment failure. Therefore, these antibodies should be assayed in patients who do not respond to PEG-IFN-α therapy, and if detected, other effective treatments, i.e., medications that are not neutralized by anti-IFN-α NAbs, should be considered.
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Affiliation(s)
- F Matsuda
- Division of Hepatobiliary and Pancreatic Diseases, Department of Internal Medicine, Hyogo College of Medicine, Hyogo, Japan
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Okada K, Takayoshi H, Mizuhara R, Iwata Y, Yamaguchi S. 2.017 RELATIONSHIP BETWEEN VISUAL HALLUCINATIONS AND CEREBRAL BLOOD FLOW ABNORMALITY IN PARKINSON'S DISEASE. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70450-3] [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: 11/26/2022]
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40
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Iwata O, Iwata Y. [Illusion or reality? Acute cerebral injury and advanced magnetic resonance]. No To Hattatsu 2011; 43:195-199. [PMID: 21638902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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41
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Iwata Y, Kawara T, Yagishita A, Higuchi K, Tanaka Y, Sasano T, Kawabata M, Hachiya H, Hirano K, Isobe M. Digital Assessment of Endothelial Function in Atrial Fibrillation and Short-Term Results of Pulmonary Vein Isolation. J Arrhythm 2011. [DOI: 10.4020/jhrs.27.pj2_014] [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: 11/11/2022] Open
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42
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Iwata Y, Wakabayashi S. P3.39 Ca2+-permeable channel TRPV2 as a promising therapeutic target for muscular dystrophy and cardiomyopathy. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.181] [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: 11/16/2022]
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43
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Yoshizaki A, Yanaba K, Iwata Y, Komura K, Ogawa A, Muroi E, Ogawa F, Takenaka M, Shimizu K, Hasegawa M, Fujimoto M, Sato S. Elevated serum interleukin-27 levels in patients with systemic sclerosis: association with T cell, B cell and fibroblast activation. Ann Rheum Dis 2010; 70:194-200. [DOI: 10.1136/ard.2009.121053] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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44
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Iwata Y, Otsuka T, Maruhn J, Itagaki N. Two different modes associated with the composite nucleus- the charge and mass distributions for exotic nuclear synthesis -. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100213002] [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: 11/14/2022] Open
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45
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Fukumura A, Tsujii H, Kamada T, Baba M, Tsuji H, Kato H, Kato S, Yamada S, Yasuda S, Yanagi T, Kato H, Hara R, Yamamoto N, Mizoe J, Akahane K, Fukuda S, Furusawa Y, Iwata Y, Kanai T, Kanematsu N, Kitagawa A, Matsufuji N, Minohara S, Miyahara N, Mizuno H, Murakami T, Nishizawa K, Noda K, Takada E, Yonai S. Carbon-ion radiotherapy: clinical aspects and related dosimetry. Radiat Prot Dosimetry 2009; 137:149-155. [PMID: 19812127 DOI: 10.1093/rpd/ncp188] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The features of relativistic carbon-ion beams are attractive from the viewpoint of radiotherapy. They exhibit not only a superior physical dose distribution but also an increase in biological efficiency with depth, because energy loss of the beams increases as they penetrate the body. This paper reviews clinical aspects of carbon-beam radiotherapy using the experience at the National Institute of Radiological Sciences. The paper also outlines the dosimetry related to carbon-beam radiotherapy, including absolute dosimetry of the carbon beam, neutron measurements and radiation protection measurements.
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Affiliation(s)
- A Fukumura
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba-shi 263-8555, Japan
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Abstract
BACKGROUND AND OBJECTIVE We have previously reported that administration of aprotinin at a single dose protects the cerebral microcirculation. The current study was designed to identify the optimal dose for protecting the cerebral microcirculation with assessment of neurological and behavioral recovery as well as renal function after circulatory arrest and ultra-low-flow bypass. METHODS Twenty-four piglets were randomly assigned to three bypass groups at risk for postoperative cerebral and renal dysfunction. Cerebral microcirculation was assessed by intravital microscopy. Rhodamine-stained leukocytes were observed for adhesion and rolling. Animals were randomized to one of four aprotinin doses. Neurological deficit score, histological score, creatinine and blood urea nitrogen were analyzed, both independently for this study as well as in combination with 50 animals who were studied with the same protocol and near-infrared spectroscopy. RESULTS There was a dose-dependent relationship, resulting in fewer activated rolling leukocytes with a higher aprotinin dose. Aprotinin dose was an independent predictor of more rapid recovery of neurological and behavioral outcome. We present a linear regression model where aprotinin dose predicts neurological score. Aprotinin had no impact on renal function. CONCLUSIONS Aprotinin reduces cerebral leukocyte activation and accelerates neurologic recovery in a dose-dependent fashion. Aprotinin has no measurable impact on standard indices of renal function in young piglets. The current lack of availability of aprotinin is a serious disadvantage for pediatric patients undergoing cardiopulmonary bypass.
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Affiliation(s)
- N Ishibashi
- Department of Cardiac Surgery, Children's National Medical Center, Washington, DC 20010-2970, USA
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47
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Akiyama Y, Ogawa F, Iwata Y, Komura K, Hara T, Muroi E, Bae SJ, Takenaka M, Shimizu K, Hasegawa M, Fujimoto M, Sato S. Autoantibody against activating transcription factor-2 in patients with systemic sclerosis. Clin Exp Rheumatol 2009; 27:751-757. [PMID: 19917156] [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: 05/28/2023]
Abstract
OBJECTIVES To determine the prevalence and clinical correlation of autoantibody to activating transcription factor (ATF)-2, a transcription factor of ATF/CREB family, in patients with systemic sclerosis (SSc). METHODS Anti-ATF-2 Ab was examined by ELISA and immunoblotting using human recombinant ATF-2. ATF-2 activity to bind target DNA was evaluated by ELISA using a plate coated with oligonucleotide containing the consensus binding site for ATF-2. RESULTS IgG anti-ATF-2 Ab levels in SSc patients (n=69) were significantly higher than those in normal controls (n=26). SSc patients positive for IgG anti-ATF-2 Ab had significantly longer disease duration, more frequent presence of decreased %VC and %DLco, and elevated levels of serum IgG, serum IgA, and erythrocyte sedimentation rates than those negative. More-over, IgG anti-ATF-2 Ab levels correlated inversely with %VC or %DLco. The presence of anti-ATF-2 Ab in SSc patients was confirmed by immunoblotting analysis. IgG isolated from serum samples of SSc patients positive for IgG anti-ATF-2 Ab by ELISA slightly but significantly inhibited ATF-2 activity compared with normal controls. CONCLUSIONS These results suggest that anti-ATF-2 Ab is a new autoantibody in SSc and that it serves as a novel serological marker for inflammation and lung involvement in SSc.
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Affiliation(s)
- Y Akiyama
- Department of Dermatology, Nagasaki University Graduate School of Biomedical Sciences, Japan
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Li Q, Wang Z, Zhu D, Xu M, Chen X, Peng D, Iwata Y, Xie P. Detection and analysis of Borna disease virus in Chinese patients with neurological disorders. Eur J Neurol 2009; 16:399-403. [PMID: 19364367 DOI: 10.1111/j.1468-1331.2008.02516.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND PURPOSE Borna disease virus (BDV) is a neurotropic RNA virus that is known to cause neurological disturbances in various animal species, potentially even humans. However, the association between BDV infection and human neurological disorders remains unclear. METHODS Between August 2005 and March 2006, 65 patients with neurological disorders were enrolled into our study. The presence of BDV p24 RNA from peripheral blood mononuclear cells (PBMCs) was investigated by using nested reverse transcriptase PCR (RT-PCR) assay. RESULTS Borna disease virus p24 RNA was detected from PBMCs in six patients with viral encephalitis by using nested RT-PCR assay. However, BDV p24 RNA was not detected in patients with multiple sclerosis or peripheral nerve diseases. CONCLUSION There might be possible associations between BDV infection and human viral encephalitis.
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Affiliation(s)
- Q Li
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
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49
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Okamura T, Ishibashi N, Iwata Y, Zurakowski D, Jonas RA. Aprotinin concentration varies significantly according to cardiopulmonary bypass conditions. Perfusion 2009; 23:355-60. [PMID: 19454564 DOI: 10.1177/0267659109105080] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Although aprotinin is partially excreted unchanged in the urine, its primary site of metabolism is in the renal lysosomes following proximal tubule resorption. This study tested the hypothesis that plasma aprotinin concentration varies with cardiopulmonary bypass conditions. Thirty-two piglets (weight 13.2 +/- 1.9 kg) received an aprotinin initial dose of 30,000 KIU/kg, a maintenance infusion of 10,000 KIU/kg/h, with a cardiopulmonary bypass (CPB) prime of 30,000 KIU/kg. Aprotinin infusion was terminated at the end of CPB and stopped during hypothermic circulatory arrest (HCA). Piglets were randomized to four groups (n = 8 per group): HCA, 60-minute period at 15 degrees C; low-flow (LF), 10 mL/kg/min low-flow CPB at 25 degrees C; full flow (FF), full flow CPB at 37 degrees C; control at 37 degrees C without CPB. Blood samples were collected at 7 time points: after induction of anesthesia (baseline), after initial dose, 10, 50 and 115 min after start of CPB, just before end of CPB and 30 min after CPB. Plasma aprotinin levels were determined by modified functional assays. Aprotinin levels in the control group were significantly lower at each point after start of CPB than all groups with CPB (p < .001). In particular, during the reperfusion period, aprotinin levels were higher in HCA and LF groups than FF group (p < .05). Throughout CPB, aprotinin levels in the HCA group remained unchanged (p > .40). Bypass conditions affect plasma aprotinin concentration. Recently reported renal and neurological complications with aprotinin use during CPB may reflect excessive dosing and point to the need for real-time monitoring.
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Affiliation(s)
- T Okamura
- Children's National Heart Institute, Children's National Medical Center, Washington, DC 20010, USA
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Miller J, Taylor L, Zeitlin C, Heilbronn L, Guetersloh S, DiGiuseppe M, Iwata Y, Murakami T. Lunar soil as shielding against space radiation. RADIAT MEAS 2009. [DOI: 10.1016/j.radmeas.2009.01.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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