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Shiomi T. Bullous pemphigoid with neurofibroma-like histopathological change in two patients without neurofibromatosis type 1: Coincidence or association? Malays J Pathol 2020; 42:445-448. [PMID: 33361727] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The author reports two cases of Bullous pemphigoid (BP) with neurofibroma (NF)-like histopathological change. The two patients without neurofibromatosis type 1 (NF1) presented with several bullae on their trunk. Based on the results of positivity for anti-BP180 antibody, direct immunofluorescence, and histopathological findings, they were diagnosed with BP. Histologically, another lesion in the dermis, which was composed of spindle cells with wavy nuclei, collagen fibers, and mast cells, was located close to the bulla. Immunohistochemically, the spindle cells were diffusely positive for S-100 protein and CD34, and weakly positive for epithelial membrane antigen in certain foci. These findings were considered to be "NF-like" histopathological change. This is the first two cases of BP with NF-like histopathological change in patients without NF1.
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Affiliation(s)
- T Shiomi
- Tottori Health Service Association, Tomiyasu 2-94-4, Tottori city, Tottori Japan 680-0845.
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2
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Takamatsu S, Kagiyama N, Shiomi T, Mizobuchi M, Sone N, Tougi K, Yamauchi S, Yuri T, Fukuyama S, Shibata M, Nakazawa R, Ii N, Masutani M, Hirohata A. Impact of radial compression protocols on the compression time and radial artery occlusion. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3429] [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: 11/12/2022] Open
Abstract
Abstract
Background
Trans-radial access (TRA) has been established as a safe and established approach for invasive coronary catheter procedures. However, protocols for post-procedural hemostasis varies depending on institutes and an evidence-based protocol is lacking.
Purpose
The objective of this study was to investigate the clinical implications of procedural hemostasis.
Methods
Consecutive patients who were referred to outpatient catheter examination before and after April 2018 were treated with an old and a new protocol, respectively. In both protocols, we used the same commercially available hemostasis band with injecting an air of 16 ml for hemostasis. In the old protocol, the amount and timing of deflation were fixed, whereas the air was removed as much as possible for every 30 minutes in the new protocol. Time to complete hemostasis, the rate of major bleeding, and the rate of radial artery occlusion (RAO) at 6 months after the catheter examination were compared between the protocols.
Results
Total of 1,843 (71±10 years old, 77% male) patients was included in the study. Between patients in the old and the new protocol group (n=1,000 and 843, respectively), there was no significant difference in age, gender, body size, or systolic blood pressure. The new group had significantly higher prevalence of diabetes (47% vs 39%, p=0.002), slightly larger sheath size (4.1±0.3 vs 4.0±0.2 Fr, p<0.001), and lower rate of dual antiplatelet therapy (DAPT: 24% vs. 35%, p<0.001). Time for complete hemostasis was about one-third with the new protocol compared with the old protocol (65±32 vs. 190±16 min, p<0.001) and there was no major bleeding in either group. The rate of radial artery occlusion was 0.7% and 9.8% in the old and the new group (p<0.001). Multivariate analysis showed that the significant predictor of prolonged hemostasis time were the old protocol (odds ratio: OR 80.5, p<0.001) and the prescription of DAPT (OR 2.9, p<0.001), while the factors associated with higher risk of radial occlusion were the old protocol (OR 13.9, p<0.001), the number of previous TRA (OR 1.1, p<0.001), and smaller body size (OR 0.127 per 1 m2 increase p=0.005).
Conclusions
Our new protocol for hemostasis after TRA was strongly associated with shorter hemostasis time and a lower rate of radial artery occlusion. This approach will decrease the post-procedural hospital time with even fewer complication rates.
Study outline
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- S Takamatsu
- The Sakakibara Heart Institute of Okayama, Department of Nursing, Okayama, Japan
| | - N Kagiyama
- West Virginia University Hospital, Morgantown, United States of America
| | - T Shiomi
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - M Mizobuchi
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - N Sone
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - K Tougi
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - S Yamauchi
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - T Yuri
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - S Fukuyama
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - M Shibata
- The Sakakibara Heart Institute of Okayama, Department of Nursing, Okayama, Japan
| | - R Nakazawa
- The Sakakibara Heart Institute of Okayama, Department of Nursing, Okayama, Japan
| | - N Ii
- The Sakakibara Heart Institute of Okayama, Department of Nursing, Okayama, Japan
| | - M Masutani
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
| | - A Hirohata
- The Sakakibara Heart Institute of Okayama, Cardiovascular Medicine, Okayama, Japan
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Yurugi Y, Fujiwara W, Kidokoro Y, Hosoya K, Ohno T, Sakabe T, Kubouchi Y, Wakahara M, Takagi Y, Haruki T, Nosaka K, Miwa K, Araki K, Taniguchi Y, Shiomi T, Nakamura H, Umekita Y. P1.02-060 Podoplanin Expression in Cancer-Associated Fibroblasts Predicts Poor Prognosis in Patients with Squamous Cell Carcinoma of the Lung. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.793] [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: 11/24/2022]
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4
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Shibayama A, Sugita K, Narukawa K, Fujiwara Y, Goto H, Shiomi T, Yoshida Y, Yamamoto O. Granuloma annulare can occur on a scar, mimicking sarcoidosis. Clin Exp Dermatol 2017; 42:920-921. [PMID: 28929530 DOI: 10.1111/ced.13210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2017] [Indexed: 02/01/2023]
Affiliation(s)
- A Shibayama
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
| | - K Sugita
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
| | - K Narukawa
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
| | - Y Fujiwara
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
| | - H Goto
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
| | - T Shiomi
- Division of Organ Pathology, Department of Pathology, Tottori University Faculty of Medicine, Yonago, Japan
| | - Y Yoshida
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
| | - O Yamamoto
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Yonago, Japan
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Tsounapi P, Honda M, Dimitriadis F, Shimizu S, Shiomi T, Hikita K, Saito M, Tomita S, Sofikitis N, Takenaka A. Antioxidant treatment ameliorates diabetes-induced dysfunction of the vas deferens in a rat model. Andrologia 2017; 50. [PMID: 28224697 DOI: 10.1111/and.12795] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2016] [Indexed: 12/20/2022] Open
Abstract
Diabetes mellitus (DM) affects the male ejaculatory function. This study was designed to evaluate the role of oxidative stress in the development of diabetes-induced dysfunction of vas deferens (VD) in the rat. DM was induced by streptozotocin in 40 male Wistar rats. Subsequently, the diabetic animals were divided into three groups: DM group, DM + Eda group and DM + Tau group. These groups were administered saline, edaravone and taurine, respectively, daily for 4 weeks. Another group of ten rats served as a control group. DM was diagnosed in the 40 streptozotocin-injected rats. DM significantly reduced the VD weight. Additionally, DM induced in vitro VD hypercontractility, VD histological abnormalities and increased the serum and VD tissue concentration of malondialdehyde. VD immunohistochemistry revealed overexpression of three markers of oxidative stress. DM significantly reduced serum testosterone levels. No live birth was documented in all DM rats in mating experiments. Antioxidants significantly improved all the aforementioned parameters, except the testosterone levels. This study indicates a deleterious impact of DM-induced oxidative stress on VD histological and functional features. Antioxidant treatment may provide an adjunct tool to alleviate ejaculatory disorders for male patients with type 1 diabetes.
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Affiliation(s)
- P Tsounapi
- Division of Urology, Department of Surgery, Faculty of Medicine, Tottori University, Yonago, Japan
| | - M Honda
- Division of Urology, Department of Surgery, Faculty of Medicine, Tottori University, Yonago, Japan
| | - F Dimitriadis
- Department of Urology, School of Medicine, University of Ioannina, Ioannina, Greece
| | - S Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - T Shiomi
- Division of Organ Pathology, Department of Pathology, Faculty of Medicine, Tottori University, Yonago, Japan
| | - K Hikita
- Division of Urology, Department of Surgery, Faculty of Medicine, Tottori University, Yonago, Japan
| | - M Saito
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - S Tomita
- Department of Pharmacology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - N Sofikitis
- Department of Urology, School of Medicine, University of Ioannina, Ioannina, Greece
| | - A Takenaka
- Division of Urology, Department of Surgery, Faculty of Medicine, Tottori University, Yonago, Japan
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Shiomi T, Azeyanagi Y, Yamadera A, Nakamura T. Measurement of Residual Radioactivity of Machine Elements and Concrete on the Cyclotron Decommissioning. J NUCL SCI TECHNOL 2014. [DOI: 10.1080/00223131.2000.10874906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Katsube T, Mori M, Tsuji H, Shiomi T, Wang B, Liu Q, Nenoi M, Onoda M. Most hydrogen peroxide-induced histone H2AX phosphorylation is mediated by ATR and is not dependent on DNA double-strand breaks. J Biochem 2014; 156:85-95. [DOI: 10.1093/jb/mvu021] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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8
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Furuhashi A, Yamada S, Shiomi T, Sasanabe R, Aoki Y, Yamada Y, Kazaoka Y. Effective three-dimensional evaluation analysis of upper airway form during oral appliance therapy in patients with obstructive sleep apnoea. J Oral Rehabil 2013; 40:582-9. [DOI: 10.1111/joor.12059] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2013] [Indexed: 11/27/2022]
Affiliation(s)
- A. Furuhashi
- Department of Oral and Maxillofacial Surgery; Aichi Medical University; Nagakute Japan
| | - S. Yamada
- Department of Oral and Maxillofacial Surgery; Aichi Medical University; Nagakute Japan
| | - T. Shiomi
- Sleep Disorders Center; Aichi Medical University Hospital; Nagakute Japan
| | - R. Sasanabe
- Sleep Disorders Center; Aichi Medical University Hospital; Nagakute Japan
| | - Y. Aoki
- Department of Oral and Maxillofacial Surgery; Aichi Medical University; Nagakute Japan
| | - Y. Yamada
- Department of Oral and Maxillofacial Surgery; Aichi Medical University; Nagakute Japan
| | - Y. Kazaoka
- Department of Oral and Maxillofacial Surgery; Aichi Medical University; Nagakute Japan
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Tamura S, Nishii T, Shiomi T, Yamazaki Y, Murase K, Yoshikawa H, Sugano N. Three-dimensional patterns of early acetabular cartilage damage in hip dysplasia; a high-resolutional CT arthrography study. Osteoarthritis Cartilage 2012; 20:646-52. [PMID: 22469852 DOI: 10.1016/j.joca.2012.03.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [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] [Received: 07/05/2011] [Revised: 02/28/2012] [Accepted: 03/21/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The purpose of this study was to examine the three-dimensional (3D) progression patterns of early acetabular cartilage damage in hip dysplasia using high-resolutional computed tomography (CT) arthrography. DESIGN Thirty-two dysplastic hips of 26 Japanese symptomatic females including 21 hips in pre-stage of osteoarthritis (Kellgren-Lawrence (K-L) grade 0; mean patient age, 32.0 years) and 11 hips in early stage of osteoarthritis (K-L grade 1 or 2; mean patient age, 32.8 years) were examined. Isotropic high-resolutional CT arthrography with an image resolution of 0.5 mm in any orthogonal direction was performed. A 3D acetabular cartilage model was generated and we evaluated distribution of cartilage thickness in 12 zones after dividing the weight-bearing area of the hip joint in radial and lateral/medial directions. RESULTS In pre-stage of osteoarthritis, significant differences in cartilage thickness were observed between the lateral and medial zones in all radial regions, most prominently in the antero-superior region. In early stage of osteoarthritis, no significant differences in cartilage thickness were observed, except in the most posterior region. The lateral-medial (LM) ratio was defined as cartilage thickness in the lateral zone divided by that in the medial zone, and hips with the LM ratio in the antero-superior region of <1.4 had significantly more extensive involvement of labral tears than hips with the LM ratio of ≥1.4. CONCLUSIONS In hip dysplasia, acetabular cartilage damage was probably occurred in the antero-superior lateral area. The LM ratio may be a sensitive index to quantify early cartilage damage associated with extent of labral disorders.
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Affiliation(s)
- S Tamura
- Department of Orthopaedic Medical Engineering, Osaka University Medical School, Osaka, Japan
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10
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Shiomi T, Noguchi T, Nakayama H, Yoshida Y, Yamamoto O, Hayashi N, Ohara K. Clinicopathological study of invasive extramammary Paget’s disease: subgroup comparison according to invasion depth. J Eur Acad Dermatol Venereol 2012; 27:589-92. [DOI: 10.1111/j.1468-3083.2012.04489.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Takada H, Shimizu Y, Matsuura Y, Shiomi T, Miyao M. Non-linear analysis of stabilograms with alcoholic intake. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2012:4208-4211. [PMID: 23366856 DOI: 10.1109/embc.2012.6346895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Equilibrium function in the cerebellum (vestibulo-cerebellar system) can deteriorate under the influence of alcohol. In the Romberg posture, the center of gravity, which was measured every 50 ms by stabilometry, appeared to shift with alcohol ingestion. In the previous study, a locus in the center of gravity (stabilogram) was converted to values of statistical indices such as area of sway, total locus length, and locus length per unit area, although these indices could not always distinguish between the statokinesigrams sampled from seven healthy young males in sober and intoxicated states. This measurement was made with an AMTI force plate. In this study, "translation error" was estimated in a d-dimensional embedding space in order to compare statokinesigrams recorded before and after the ingestion of doubly diluted brandy in 30 s (1 ≤ d ≤ 10). We succeeded in validating a stochastic differential equation as a mathematical model of the body sway. The randomness in the model was preserved after alcohol intake and significantly increased in the medial/lateral direction. Visual information referred by the postural control system when standing might be interfered by the effects of intoxication, which was regarded as disturbance. This method is considered to be useful to diagnose the disorders of the vestibulocerebellar system.
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Affiliation(s)
- H Takada
- Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo Fukui-City, Fukui, 910-8507 Japan.
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Shiomi T, Nishii T, Tanaka H, Yamazaki Y, Murase K, Myoui A, Yoshikawa H, Sugano N. Loading and knee alignment have significant influence on cartilage MRI T2 in porcine knee joints. Osteoarthritis Cartilage 2010; 18:902-8. [PMID: 20472084 DOI: 10.1016/j.joca.2010.05.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [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] [Received: 10/14/2009] [Revised: 04/27/2010] [Accepted: 05/03/2010] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Physiological magnetic resonance imaging (MRI) under loading or knee malalignment conditions has not been thoroughly investigated. We assessed the influence of static loading and knee alignment on T2 (transverse relaxation time) mapping of the knee femoral cartilage of porcine knee joints using a non-metallic pressure device. METHODS Ten porcine knee joints were harvested en bloc with intact capsules and surrounding muscles and imaged using a custom-made pressure device and 3.0-T MRI system. Sagittal T2 maps were obtained (1) at knee neutral alignment without external loading (no loading), (2) under mechanical compression of 140 N (neutral loading), and (3) under the same loading conditions as in (2) with the knee at 10 degrees varus alignment (varus loading). T2 values of deep, intermediate, and superficial zones of the medial and lateral femoral cartilages at the weight-bearing area were compared among these conditions using custom-made software. Cartilage contact pressure between the femoral and tibial cartilages, measured by a pressure-sensitive film, was correlated with cartilage T2 measurements. RESULTS In the medial cartilage, mean T2 values of the deep, intermediate, and superficial zones decreased by 1.4%, 13.0%, and 6.0% under neutral loading. They further decreased by 4.3%, 19.3%, and 17.2% under varus loading compared to no loading. In the lateral cartilage, these mean T2 values decreased by 3.9%, 7.7%, and 4.2% under neutral loading, but increased by 1.6%, 9.6%, and 7.2% under varus loading. There was a significant decrease in T2 values in the intermediate zone of the medial cartilage under both neutral and varus loading, and in the superficial zone of the medial cartilage under varus loading (P<0.05). Total contact pressure values under neutral loading and varus loading conditions significantly correlated with T2 values in the superficial and intermediate zones of the medial cartilages. CONCLUSIONS The response of T2 to change in static loading or alignment varied between the medial and lateral cartilages, and among the deep, intermediate, and superficial zones. These T2 changes were significantly related to the contact pressure measurements. Our results indicate that T2 mapping under loading allows non-invasive, biomechanical assessment of site-specific stress distribution in the cartilage.
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Affiliation(s)
- T Shiomi
- Department of Orthopaedic Surgery, Osaka University Medical School, Suita, Osaka, Japan
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Okamoto N, Tanioka M, Yamamoto T, Shiomi T, Miyachi Y, Utani A. Intralymphatic histiocytosis associated with rheumatoid arthritis. Clin Exp Dermatol 2008; 33:516-8. [DOI: 10.1111/j.1365-2230.2008.02735.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shiraishi Y, Asano K, Niimi K, Wakaki M, Kagyo J, Takihara T, Sayama K, Nakajima T, Oguma T, Suzuki Y, Shiomi T, Ikeda E, Ishizaka A. The Influence of Eosinophilic Airway Inflammation in Response to Double-Stranded RNA Instillation. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.1247] [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: 10/24/2022]
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Niimi K, Asano K, Shiraishi Y, Takihara T, Kagyo J, Wakaki M, Nakajima T, Suzuki Y, Shiomi T, Oguma T, Ishizaka A. Toll-like Receptor 3 and Chemokine Synthesis in Human Bronchial Smooth Muscle Cells. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.1244] [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: 11/26/2022]
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Shiraishi Y, Asano K, Nakajima T, Niimi K, Suzuki Y, Shiomi T, Sayama K, Oguma T, Ikeda E, Hirai H, Yamaguchi K, Ishizaka A. Prostaglandin D2-induced eosinophilic airway inflammation is mediated by CRTH2 receptor. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Niimi K, Asano K, Shiraishi Y, Wakaki M, Nakajima T, Kagyo J, Suzuki Y, Shiomi T, Oguma T, Sayama K, Yamaguchi K, Ishizaka A. Double-stranded RNA-induced CC chemokine synthesis in human bronchial smooth muscle cells and toll-like receptor 3. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.1088] [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: 11/24/2022]
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Nakajima T, Asano K, Shiraishi Y, Niimi K, Wakaki M, Suzuki Y, Shiomi T, Oguma T, Ishizaka A. Expression of PGD2 receptor CRTH2 (DP2) on human lung fibroblasts. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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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Asano K, Suzuki Y, Shiomi T, Nakajima T, Kudoh H, Matsuzaki T, Yamada W, Hiraoka R, Yamaguchi K, Nagabukuro A, Harada Y. Airway responsiveness to beta-agonist and beta2-adrenoceptor gene polymorphisms. J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)80964-8] [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: 10/24/2022]
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Inoue S, Shiomi T, Furuya H. Severe bradycardia in a patient with myasthenia gravis during transurethral ureterolithotripsic procedure under spinal anaesthesia. Anaesth Intensive Care 2002; 30:387. [PMID: 12075657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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Rasolonjatovo AHD, Shiomi T, Nakamura T, Nishizawa H, Tsudaka Y, Fujiwara H, Araki H, Matsuo K. Development of a gamma ray monitor using a CdZnTe semiconductor detector. Radiat Prot Dosimetry 2002; 101:77-80. [PMID: 12382709 DOI: 10.1093/oxfordjournals.rpd.a006063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of this study was to develop a new X ray and gamma ray monitor using the CdZnTe semiconductor detector, which has high sensitivity at room temperature. The pulse height spectra and the detection efficiencies of a 10 mm x 10 mm by 2 mm thick CdZnTe detector were measured in the energy range of 10 keV to 1.8 MeV by using monoenergetic X ray and gamma ray sources. The measured results showed very good agreement with the results calculated using the EGS4 Monte Carlo code taking into account the charge collection efficiency in the detector. By using two CZT detectors of 10 mm x 10 mm x 2 mm and 3 mm x 3 mm x 2 mm coupled with a filter, the weighted sum of a few energy channels with different cut-off energies was finally found to achieve a flat energy response with an equivalent dose (counts per microSv) within +/-30% or +/- 10% deviation.
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Affiliation(s)
- A H D Rasolonjatovo
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai, Miyagi, Japan.
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Abstract
Cells isolated from Xpg (the mouse counterpart of XPG)-disrupted mice underwent premature senescence and showed early onset of immortalization, suggesting that Xpg might be involved in genetic stability. Recent studies showed that human XPG, in addition to its function in the nucleotide excision repair (NER), was involved in the repair of oxidative base damages such as thymine glycol (Tg) and 8-oxo-guanine (8-oxoG), and this may explain the genetic instability observed in Xpg-deficient cells. To clarify this point, we determined spontaneous mutation frequencies and the type of spontaneous base substitution mutations in cells obtained from normal and Xpg-deficient mice using the supF shuttle vector (pNY200) for mutation assay. The spontaneous mutation frequency of the supF gene in pNY200 propagated in the Xpg-deficient cells was about three times higher than that in normal cells, indicating the importance of Xpg in reducing the frequency of spontaneous mutations. The frequency of spontaneous base substitution mutations at A:T sites, particularly that of the A:T to C:G transversion, increased markedly in the Xpg-deficient cells.
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Affiliation(s)
- N Shiomi
- The Genome Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
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Tsutsui H, Ide T, Shiomi T, Kang D, Hayashidani S, Suematsu N, Wen J, Utsumi H, Hamasaki N, Takeshita A. 8-oxo-dGTPase, which prevents oxidative stress-induced DNA damage, increases in the mitochondria from failing hearts. Circulation 2001; 104:2883-5. [PMID: 11739300 DOI: 10.1161/hc4901.101347] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [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] [Indexed: 11/16/2022]
Abstract
BACKGROUND Reactive oxygen species (ROS) can cause an oxidative modification of nucleotides, such as 8-oxo-7,8-dihydrodeoxyguanosine triphosphate (8-oxo-dGTP), which can lead to defects in DNA replication. The misincorporation of 8-oxo-dGTP into DNA is prevented by 8-oxo-dGTPase, which hydrolyzes 8-oxo-dGTP into 8-oxo-dGMP. The changes in this defensive system have not yet been examined in failing hearts, in which the generation of ROS increases. METHODS AND RESULTS Myocardial infarction (MI) was created in mice by ligating the left coronary artery. Four weeks later, the left ventricle was dilated and contractility was diminished on echocardiography. The generation of ROS, as measured by electron spin resonance spectroscopy with 4-hydroxy-2,2,6,6-tetramethyl-piperidine-N-oxyl, increased in the noninfarcted left ventricle from MI mice. The formation of thiobarbituric acid-reactive substances also increased in the mitochondria from MI mice. 8-Oxo-dGTPase was detected in the mitochondrial fractions isolated from MI mice using a Western blot analysis with an antibody to its human homologue (hMTH1). Immunohistochemistry showed positive staining for hMTH1 was localized in the cardiac myocytes. CONCLUSIONS The level of 8-oxo-dGTPase increased in the mitochondria isolated from post-MI hearts as oxidative stress increased, thus suggesting that a preventive mechanism is activated against ROS-induced DNA damage. As a result, 8-oxo-dGTPase is considered a useful marker of mitochondrial oxidative stress in heart failure.
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Affiliation(s)
- H Tsutsui
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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25
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Asano K, Nakamura M, Oguma T, Fukunaga K, Matsubara H, Shiomi T, Ishizaka A, Yamaguchi K, Kanazawa M. Differential expression of CCR3 ligand mRNA in guinea pig lungs during allergen-induced inflammation. Inflamm Res 2001; 50:625-30. [PMID: 11822789 DOI: 10.1007/pl00000244] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE AND DESIGN The gene expression profile of CCR3 ligands, eotaxin, RANTES, and monocyte chemoattractant protein-3 (MCP-3), was examined in normal and inflamed guinea pig lungs. MATERIAL Male Hartley guinea pigs (n = 49). METHODS Pulmonary mRNA was obtained from naive animals, animals treated with intravenous lipopolysaccharide administration, and animals repeatedly exposed to aerosolized allergen (ovalbumin). Northern analysis was performed to quantify pulmonary expression of eotaxin, RANTES, and MCP-3 mRNA. Pulmonary eosinophil peroxidase (EPO) activity was measured to quantify eosinophil accumulation. RESULTS Eotaxin and RANTES mRNAs, but not MCP-3 mRNA, were constitutively expressed in guinea pig lungs. Lipopolysaccharide treatment increased MCP-3 mRNA expression, but not eotaxin or RANTES mRNA. In contrast, allergen exposure in sensitized animals caused an increase in eotaxin mRNA, which demonstrated good temporal and quantitative correlation with pulmonary EPO activity, but not in MCP-3 or RANTES mRNA. CONCLUSIONS Guinea pig CCR3 ligands demonstrated different gene expression profiles in normal and inflamed airways, suggesting that they play different physiological and pathophysiological roles in the airway.
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Affiliation(s)
- K Asano
- Cardiopulmonary Division, Department of Medicine, Keio University School of Medicine, Tokyo, Japan.
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Fukunaga K, Ishii S, Asano K, Yokomizo T, Shiomi T, Shimizu T, Yamaguchi K. Single nucleotide polymorphism of human platelet-activating factor receptor impairs G-protein activation. J Biol Chem 2001; 276:43025-30. [PMID: 11560941 DOI: 10.1074/jbc.m108288200] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Various proinflammatory and vasoactive actions of platelet-activating factor (PAF) are mediated through a specific G-protein-coupled PAF receptor (PAFR). We identified a novel DNA variant in the human PAFR gene, which substitutes an aspartic acid for an alanine residue at position 224 (A224D) in the putative third cytoplasmic loop. This mutation was observed in a Japanese population at an allele frequency of 7.8%. To delineate the functional consequences of this structural alteration, Chinese hamster ovary cells were stably transfected with constructs encoding either wild-type or A224D mutated PAFR. No significant difference was observed in the expression level of the receptor or the affinity to PAF or to an antagonist, WEB2086, between the cells transfected with wild-type and mutant PAFR. Chinese hamster ovary cells expressing A224D mutant PAFR displayed partial but significant reduction of PAF-induced intracellular signals such as calcium mobilization, inositol phosphate production, inhibition of adenylyl cyclase, and chemotaxis. These findings suggest that this variant receptor produced by a naturally occurring mutation exhibits impaired coupling to G-proteins and may be a basis for interindividual variation in PAF-related physiological responses, disease predisposition or phenotypes, and drug responsiveness.
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Affiliation(s)
- K Fukunaga
- Department of Medicine, Keio University School of Medicine, Tokyo 160-8582, Japan
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27
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Oshima K, Shiomi T, Kuboyama T, Sawayanagi T, Nishigawa H, Kakizawa S, Miyata S, Ugaki M, Namba S. Isolation and Characterization of Derivative Lines of the Onion Yellows Phytoplasma that Do Not Cause Stunting or Phloem Hyperplasia. Phytopathology 2001; 91:1024-1029. [PMID: 18943436 DOI: 10.1094/phyto.2001.91.11.1024] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
ABSTRACT Two lines of onion yellows phytoplasma producing milder symptoms were isolated from the original line (OY-W). One has an additional characteristic, non-insect-transmissibility (OY-NIM), compared with the other (OY-M). OY-M was established after maintaining OY-W for 11 years on a plant host (Chrysanthemum coronarium) with an insect vector (Macrosteles striifrons), and OY-NIM was isolated after subsequent maintenance of OY-M in plants by periodic grafting. Polymerase chain analysis suggested that OY-NIM cannot traverse the gut or survive in the hemolymph of the leafhopper. OY-W results in witches'-broom formation and stunted growth in the host plant. In contrast, OY-M and OY-NIM do not cause stunting in the host plant, although they result in witches'-broom. Histopathological analysis of these lines revealed that the hyperplastic phloem tissue and severe phloem necrosis seen in OY-W did not exist in OY-M and OY-NIM. This was attributed to a reduction in the population of phytoplasma in tissues in both OY-M- and OY-NIM-infected plants. The results suggest that the cause of stunting and phloem hyperplasia may be genetically different from the cause of witches'-broom. Pulsed field gel electrophoresis analysis showed that OY-M had a smaller genome size ( approximately 870 kbp) than OY-W ( approximately 1,000 kbp). Thus, some of the OY-W genes responsible for pathogenicity may not be present in OY-M.
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Tadokoro M, Shiomi T, Isobe K, Nakasuji K. Cesium(I)-mediated 3-D superstructures by one-pot self-organization of hydrogen-bonded nickel complexes. Inorg Chem 2001; 40:5476-8. [PMID: 11599939 DOI: 10.1021/ic010331s] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M Tadokoro
- Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
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29
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Inoue S, Shiomi T, Furuya H. Bradycardia during spinal anaesthesia for transurethral ureterolithotripsy. Anaesth Intensive Care 2001; 29:556-7. [PMID: 11669448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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Abstract
Ku proteins play an important role in DNA double-strand break (DSB) repair, chromosome maintenance, and growth regulation. To understand the fundamental characteristics of Ku proteins, we examined the electrophoretic mobility and expression of hamster Ku70 and Ku80 and determined the chromosome locations of their genes. The electrophoretic mobility of hamster Ku proteins are different from that of human Ku proteins. No significant changes in the quantity of Ku proteins were observed in CHO-K1 cells treated with 10 Gy of ionizing radiation, suggesting that both proteins are expressed constitutively in amounts adequate to repair DNA DSBs. The chromosome locations of the Ku genes were determined by direct R-banding fluorescence in situ hybridization. The Ku70 gene was localized to Syrian hamster chromosome 4qa4.1--> qa4.2 and Chinese hamster chromosome 2p3.1, and the Ku80 gene was localized to Syrian hamster chromosome 4qb5--> qb6.1 and Chinese hamster chromosome 2p3.5-->p3.6. These results provide clues to the biological functions of Ku, as well as useful information for constructing comparative chromosome maps between hamsters and other mammalian species, including human, mouse, and rat.
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Affiliation(s)
- M Koike
- Genome Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
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31
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Tsutsui H, Ide T, Hayashidani S, Suematsu N, Shiomi T, Wen J, Ichikawa K, Utsumi H, Takeshita A. Enhanced generation of reactive oxygen species in the limb skeletal muscles from a murine infarct model of heart failure. Circulation 2001; 104:134-6. [PMID: 11447074 DOI: 10.1161/01.cir.104.2.134] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.9] [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] [Indexed: 11/16/2022]
Abstract
BACKGROUND The generation of reactive oxygen species (ROS) is enhanced in the failing myocardium. We hypothesized that ROS were also increased in the limb skeletal muscles in heart failure. Methods and Results-- Myocardial infarction (MI) was created in mice by ligating the left coronary artery. After 4 weeks, the left ventricle was dilated and contractility was diminished by echocardiography. Left ventricular end-diastolic pressure was elevated after MI in association with an increase in lung weight/body weight and the presence of pleural effusion. The generation of ROS in the limb muscles, including the soleus and gastrocnemius muscles, which were excised after MI, was measured by electron spin resonance spectroscopy with 4-hydroxy-2,2,6,6-tetramethyl-piperidine-N-oxyl (hydroxy-TEMPO). Overall, generation was increased, but it was attenuated in the presence of dimethylthiourea or 4,5-dihydroxy-1,2-benzenedisulfonic disodium salt in the reaction mixture, indicating increased generation of hydroxyl radicals originating from superoxide anion. Thiobarbituric acid-reactive substance formation was also increased in muscles after MI. Mitochondrial complex I and III activities were both decreased after MI, which may have caused the functional uncoupling of the respiratory chain and ROS production. Antioxidant enzyme activities, including superoxide dismutase, catalase, and glutathione peroxidase, were comparable between groups. CONCLUSIONS Skeletal muscle in post-MI heart failure expressed an increased amount of ROS in association with ROS-mediated lipid peroxidation. This supports the hypothesis that oxidative stress may cause (at least in part) skeletal muscle dysfunction in heart failure.
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Affiliation(s)
- H Tsutsui
- Departments of Cardiovascular Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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32
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Banno K, Shiomi T, Sasanabe R, Hasegawa R, Otake K, Yamakawa H, Kobayashi T, Horiba K, Nishino S. Narcolepsy and other non-SAS hypersomnia in sleep breathing disorders clinic. Psychiatry Clin Neurosci 2001; 55:203-4. [PMID: 11422842 DOI: 10.1046/j.1440-1819.2001.00826.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Four of the 708 snorers (0.56%), referred to our sleep breathing disorders clinic for the past 2 years were diagnosed as having narcolepsy-cataplexy. Detecting HLA DRB1*1501/DQB1*0602 positive was informative for differentiating genuine narcolepsy from non-sleep apnea syndrome (non-SAS) hypersomnia in our clinic. A non-SAS obese boy, diagnosed as having essential hypersomnia syndrome, was found to be HLA DRB1*1502/DQB1*0601 positive. His hypocretin concentration was 206 pg/mL in the cerebrospinal fluid.
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Affiliation(s)
- K Banno
- The Third Department of Internal Medicine, Sleep Disorders Center, Aichi Medical University School of Medicine, Aichi, Japan.
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Kato I, Shiomi T, Sasanabe R, Hasegawa R, Otake K, Banno K, Yamakawa H, Mizutani N, Kobayashi T. Effects of physiological cardiac pacing on sleep-disordered breathing in patients with chronic bradydysrhythmias. Psychiatry Clin Neurosci 2001; 55:257-8. [PMID: 11422865 DOI: 10.1046/j.1440-1819.2001.00849.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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] [Indexed: 11/20/2022]
Abstract
In six patients with chronic bradydysrhythmias, polysomnographies were performed before cardiac pacemaker implantation and over the week following implantation. A patient with third-degree atrioventricular block (AVB) and two patients with sinus node dysfunction (SND) were associated with sleep-disordered breathing (SDB). Their cardiac pacemaker therapies, with the increase in the average heart rate, led to a reduction of apnea-hypopnea index and/or an improvement of Cheyne-Stokes breathing. It seems that chronic bradydysrhythmia is one of the causative factors leading to SDB.
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Affiliation(s)
- I Kato
- The Third Department of Internal Medicine, Aichi Medical University School of Medicine, Aichi, Japan
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34
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Shiomi T. [Function of XPG gene and symptoms caused by its defect]. Tanpakushitsu Kakusan Koso 2001; 46:902-7. [PMID: 11436315] [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: 02/20/2023]
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35
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Abstract
Laboratory mice carrying the nonfunctional xeroderma pigmentosum group G gene (the mouse counterpart of the human XPG gene) alleles have been generated by using gene-targeting and embryonic stem cell technology. Homozygote animals of this autosomal recessive disease exhibited signs and symptoms, such as postnatal growth retardation, reduced levels of activity, progressive ataxia and premature death, similar to the clinical manifestations of Cockayne syndrome (CS). Histological analysis of the cerebellum revealed multiple pyknotic cells in the Purkinje cell layer of the xpg homozygotes, which had atrophic cell bodies and shrunken nuclei. Further examination by an immunohistochemistry for calbindin-D 28k (CaBP) showed that a large number of immunoreactive Purkinje cells were atrophic and their dendritic trees were smaller and shorter than in wild-type littermates. These results indicated a marked degeneration of Purkinje cells in the xpg mutant cerebellum. Study by in situ detection of DNA fragmentation in the cerebellar cortex demonstrated that some deoxynucleotidyl transferase (TdT)-mediated dUTP-biotin in situ nick labeling (TUNEL)-positive cells appeared in the granule layer of the mutant mice, but few cell deaths were confirmed in the Purkinje layer. These results suggested Purkinje cell degeneration in the mutant cerebellum was underway, in which much Purkinje cell death had not appeared, and the appearance of some abnormal cerebellar symptoms in the xpg-deficient mice was not only due to a marked Purkinje cell degeneration, but also to damage of other cells.
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Affiliation(s)
- X Z Sun
- The 4th Research Group, National Institute of Radiological Sciences, Chiba, Japan
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36
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Hirayama A, Ono T, Kawata Y, Hirata N, Yamamoto M, Momose H, Yamada K, Shiomi T. [Le Duc-Camey procedure as a method of ureteroileal implantation on augmentation cystoplasty in patients with myelodysplasia]. Nihon Hinyokika Gakkai Zasshi 2001; 92:520-5. [PMID: 11449703 DOI: 10.5980/jpnjurol1989.92.520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
PURPOSE We investigated the results of Le Duc-Camey procedure as a method of ureteroileal implantation on augmentation cystoplasty in patients with myelodysplasia. MATERIALS AND METHODS A total of 14 patients (25 renal units) underwent ureteroileal implantation with Le Duc-Camey procedure on augmentation cystoplasty. The possible causes of complications concerning ureteroileal implantation that developed during the postoperative observation were classified as preoperative factors and postoperative factors.: The preoperative factors were the causative disease required ureteroneostomy, the grade of preoperative VUR, and the ureteral diameter at the anastomosis with the ileum.: The postoperative factors were the volume, and the compliance of the urinary bladder, and the maximum intravesical pressureled by the peristalsis of the utilized intestine. RESULTS With the mean observation period of 31.6 months, no complications developed but VUR observed in 4 renal units of 4 patients. The patients with VUR had a larger ureteral diameter at the anastomosis site to the ileum among the preoperative factors and a significantly larger maximum intravesical pressure led by the intestinal peristalsis among the postoperative factors when compared with the patients without VUR. CONCLUSION Regarding ureteroileal implantation with Le Duc-Camey procedure on augmentation cystoplasty in patients with myelodysplasia. It seems necessary to consider some countermeasures for the dilated ureters and for the unexpected 2 elevation of intravesical pressure due to the peristalsis of the utilized intestine.
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Affiliation(s)
- A Hirayama
- Department of Urology, Hoshigaoka Koseinenkin Hospital
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37
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Abstract
Ku, a heterodimer of Ku70 and Ku80, plays a key role in multiple nuclear processes, e.g. DNA repair, chromosome maintenance, and transcription regulation. Heterodimerization is essential for Ku-dependent DNA repair in vivo, although its role is poorly understood. Some lines of evidence suggest that heterodimerization is required for the stabilization of Ku70 and Ku80. Here we show that the heterodimerization of these Ku subunits is important for their nuclear entry. When transfected into Ku-deficient xrs-6 cells, exogenous Ku70 and Ku80 tagged with green fluorescent protein accumulated into the nucleus, whereas each nuclear localization signal (NLS)-dysfunctional mutant was undetectable in the nucleus, supporting the idea that each Ku can translocate to the nucleus through its own NLS. On the other hand, the nuclear accumulation of each NLS-dysfunctional mutant was markedly enhanced by the presence of an exogenous wild-type counterpart. In Ku-expressing HeLa cells, each NLS-dysfunctional mutant, as well as wild-type Ku70 and Ku80, was still detectable in the nucleus, whereas the double mutant of each Ku subunit with decreased functions of both nuclear targeting and dimerization was undetectable in the nucleus. Our results indicate that each Ku subunit can translocate to the nucleus not only through its own NLS but also through heterodimerization with each other.
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Affiliation(s)
- M Koike
- Genome Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
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Abstract
By immobilizing fructose-modified dendrimers on a polystyrene culture plate, the number of initially adhered hepatocytes on it was increased. Moreover, increasing the number of generations of fructose-modified dendrimer (fructose-dendrimer) increased the number. Urea synthesis per unit area also was increased, corresponding to the increase in the number of initially adhered hepatocytes. This result suggests that the fructose-dendrimers do not cause a decline in cell function. On the other hand, apoptosis of hepatocytes occurs during cultivation, and results in a decrease in the number of adhered cells and a decline in cell function. Fructose-dendrimers were found to suppress apoptosis of hepatocytes. This characteristic is considered to be responsible for the increase in the number of initially adhered hepatocytes without a decline in cell function. Fructose-dendrimers are shown to be very suitable scaffolds for use in a high-performance bioartificial liver support system.
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Affiliation(s)
- M Kawase
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan
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Fukunaga K, Asano K, Mao XQ, Gao PS, Roberts MH, Oguma T, Shiomi T, Kanazawa M, Adra CN, Shirakawa T, Hopkin JM, Yamaguchi K. Genetic polymorphisms of CC chemokine receptor 3 in Japanese and British asthmatics. Eur Respir J 2001; 17:59-63. [PMID: 11307756 DOI: 10.1183/09031936.01.17100590] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Whole genome scan analyses have revealed that chromosomal region 3p21-24, which contains a gene cluster of CC chemokine receptors such as CCR3, is possibly linked to asthma. Because CCR3 ligands play a pivotal role in the selective recruitment and activation of inflammatory cells in the asthmatic airway, the authors examined whether there is any association between asthma and the CCR3 gene polymorphisms. Three polymorphisms were identified using the single stranded conformational polymorphism method in Japanese (Asian) and British (Caucasian) subjects; one silent mutation T51C and two missense mutations G824A and T971C. These polymorphisms were examined in 391 Japanese subjects (210 asthmatics and 181 nonasthmatic controls) and 234 British subjects (142 asthmatics and 92 nonasthmatic controls). Asthma diagnosis was based on episodic symptoms, documented wheeze, and the presence of reversible airflow limitation. CCR3 T51C demonstrated a significant association with the diagnosis of asthma in the British population (odds ratio 2.35, p<0.01), but not in the Japanese population. Multiple logistic regression analysis also showed that CCR3 T51C was associated with asthma (odds ratio 2.83, p < 0.02), independent of atopic phenotypes such as high levels of total or house dust mite-specific immunoglobulin-E in serum. In conclusion, a significant association between asthma and CCR3 T51C polymorphism localized on chromosome 3p21 was found.
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Affiliation(s)
- K Fukunaga
- Dept of Medicine, Keio University School of Medicine, Tokyo, Japan
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Abstract
Ku plays an important role in multiple nuclear processes, e.g., DNA repair, chromosome maintenance, and transcriptional regulation. Although some evidence suggests that the nuclear translocation of Ku plays a key role in regulating the function of Ku, the mechanism is poorly understood. Using the site-directed mutagenesis technique, we demonstrate here that Ku70 can translocate to the nucleus without heterodimerization with Ku80. The nuclear accumulation of Ku70 mutants of the nuclear localization signal, which retained their binding ability with Ku80, was diminished. On the other hand, Ku70 mutants which lacked the ability to bind with Ku80 could translocate to the nuclei. Human Ku70, when transfected, accumulated within the nuclei of hamster xrs-6 cells which had undetectable DNA-PK activity and Ku80. Ku70 and Ku80 mutants of DNA-PK phosphorylation sites showed normal heterodimerization and nuclear translocation. These findings also support the idea that Ku70 can translocate to the nucleus independent of DNA-PK autophosphorylation.
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Affiliation(s)
- M Koike
- Genome Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan.
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Kawase M, Wang R, Shiomi T, Saijo R, Yagi K. Antioxidative activity of (-)-epigallocatechin-3-(3''-O-methyl)gallate isolated from fresh tea leaf and preliminary results on its biological activity. Biosci Biotechnol Biochem 2000; 64:2218-20. [PMID: 11129598 DOI: 10.1271/bbb.64.2218] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Antioxidative activity of (-)-epigallocatechin-3-(3''-O-methyl)gallate (catechin e) was examined. Catechin e showed a strong antioxidative activity. A preliminary test using rat cancer cells suggests that catechin e also has a strong cytotoxic activity. Among tested catechins, only catechin e has strong activity for both.
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Affiliation(s)
- M Kawase
- Faculty of Agriculture, Kagawa University, Takamatsu, Japan
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Muratani H, Kimura Y, Fukiyama K, Kawano Y, Fujii J, Abe K, Kuwajima I, Ishii M, Shiomi T, Mikami H, Ibayashi S, Omae T. Control of blood pressure and lifestyle-related risk factors in elderly Japanese hypertensive subjects. Hypertens Res 2000; 23:441-9. [PMID: 11016798 DOI: 10.1291/hypres.23.441] [Citation(s) in RCA: 12] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study was to analyze the treatment of elderly hypertensive patients by Japanese physicians specializing in hypertension. We enrolled 939 patients with hypertension who were treated in the outpatient clinics of 11 hospitals in 1995; 793 of these patients (388 men and 405 women; mean age, 66.6+/-9.0 years) received follow-up examinations in 1996, and the data on these patients was used for the present analysis. Blood pressure (BP), body mass index, lifestyle, and laboratory data were analyzed in all patients. The average BP was 143+/-16/81+/-10 mmHg in 1995 and 142+/-15/80+/-10 mmHg in 1996. The patients whose baseline BP was at the level of Grade 2 or 3 in the WHO-ISH classification (n=117) were characterized by a higher women-to-men ratio, higher age, a higher serum total cholesterol concentration, and higher QRS voltage. In these patients, from 1995 to 1996, the average BP significantly decreased, whereas fasting plasma glucose, serum total cholesterol and serum creatinine concentrations showed only negligible changes. In 220 patients (28%), BP was <140/<90 mmHg at both the initial and the follow-up examinations, whereas 351 patients (44%) were hypertensive in both 1995 and 1996. Thirty-three percent of the patients were smokers. More smokers than nonsmokers had had prior cardiovascular events, diabetes mellitus, or overt proteinuria. In conclusion, the average BP level among the patients treated by Japanese physicians specializing in hypertension was somewhat higher than that recommended by WHO-ISH Guidelines (1999). Patient education to control lifestyle-related risk factors, particularly to stop smoking, should be emphasized.
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Affiliation(s)
- H Muratani
- Third Department of Internal Medicine, University of the Ryukyus School of Medicine, Okinawa, Japan
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Shiomi T, Guilleminault C, Sasanabe R, Oki Y, Hasegawa R, Otake K, Banno K, Usui K, Maekawa M, Kanayama H, Takahashi R, Kobayashi T. Primary pulmonary hypertension with central sleep apnea: sudden death after bilevel positive airway pressure therapy. Jpn Circ J 2000; 64:723-6. [PMID: 10981861 DOI: 10.1253/jcj.64.723] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An obese 23-year-old man with sleep-disordered breathing and primary pulmonary hypertension (PPH) had been administered oral beraprost sodium, anticoagulant warfarin, and home oxygen therapy, at another hospital as treatment for the PPH, but he had not experienced any symptomatic improvement. The patient had a body mass index of 32.4kg/m2, and complained of fatigue, shortness of breath on exertion, excessive daytime sleepiness, and snoring. Arterial blood gas analysis showed a PaO2 and a PaCO2 of 70.9 and 31.2mmHg, respectively. A polysomnographic study revealed central sleep apnea with an apnea-hypopnea index (AHI) of 29.7episodes/h. The patient showed improvement of daytime sleepiness after starting nocturnal nasal bilevel positive airway pressure (BiPAP) therapy for the central sleep apnea, but his pulmonary hypertension, measured in the daytime, worsened. The patient died suddenly while walking to the bathroom in the morning 1 month after initiation of BiPAP therapy. It is necessary to consider the possibility of sudden death when nasal BiPAP therapy is given to a PPH patient with central sleep apnea.
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Affiliation(s)
- T Shiomi
- The Third Department of Internal Medicine, Aichi Medical University School of Medicine, Japan
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Shiomi T. [Telemedicine and lifestyle modifications in obstructive sleep apnea patients]. Nihon Rinsho 2000; 58:1689-92. [PMID: 10944936] [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] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The recent advent of information technology(IT) has led to the application of telemedicine to the diagnosis of sleep-disordered breathing(SDB) such as obstructive sleep apnea(OSA). Trials with automatic SDB analyzers(Night Watch and Alice 4) are investigating the use of home SDB testing via telephone circuits or the internet, home continuous positive airway pressure(CPAP) titration via remote-control, and super-remote polysomnographic monitoring using the time difference between Japan and the United States. In 1994, we developed a computer-controlled lifestyle improvement support system(AILIFE) using a telephone circuit. The support system is expected to heighten the effectiveness of treatments for OSA with CPAP, prosthetic mandibular advancement, or uvulopalatopharyngoplasty by improving the lifestyle of OSA patients through the provision of home-based guidance on nutrition and exercise via telecare.
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Affiliation(s)
- T Shiomi
- Third Department of Internal Medicine, Aichi Medical University School of Medicine
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Maekawa M, Shiomi T. [Sleep apnea syndrome (SAS) and ischemic heart disease (IHD)]. Nihon Rinsho 2000; 58:1702-6. [PMID: 10944939] [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] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Several epidemiological studies have suggested that sleep-disordered breathing is a risk factor for cardiovascular disease, particularly hypertension, stroke and IHD. The relative risk for IHD among obstructive SAS(OSAS) patients is 1.2 to 6.9 higher compared with the general population. The prevalence of SAS with an apnea-hypopnea index(AHI) of 10 and over was 35 to 40% in IHD, while 23.8% of SAS patients had IHD. These evidence suggests that IHD is an important prognostic factor in SAS patients. Characteristic pathophysiological conditions such as sleep apnea-induced hypoxemia and sympathetic activation may play an important role in the genesis of nocturnal angina pectoris. Most patients with OSAS are obese, and the complication of non-insulin dependent diabetes mellitus is quite a few. Insulin resistance is also attracting great attention as a cause of the cardiovascular complication of SAS.
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Affiliation(s)
- M Maekawa
- Third Department of Internal Medicine, Aichi Medical University School of Medicine
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Hasegawa R, Shiomi T, Sasanabe R, Otake K, Banno K, Oki Y, Maekawa M, Kobayashi T, Ito A, Taniguchi A, Ozeki K. Sleep apnea syndrome in patients with pulmonary thromboembolism. Psychiatry Clin Neurosci 2000; 54:342-3. [PMID: 11186105 DOI: 10.1046/j.1440-1819.2000.00706.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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] [Indexed: 11/20/2022]
Abstract
Seven patients (one man and six women) with a diagnosis of pulmonary thromboembolism (PTE) were examined by polysomnography in order to clarify the relationship between sleep-related breathing disorders and PTE. In the chronic stage of PTE, sleep apnea syndrome (SAS) was recognized in two patients (a man and a woman) among the subjects. Four of the five patients without SAS showed nocturnal hypoxemia. The female predominance was different from ordinary SAS without the disease background of PTE even though PTE is accompanied by hypoxemia and pulmonary hypertension like SAS. A pathophysiological relationship between PTE and SAS was not found in this study.
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Affiliation(s)
- R Hasegawa
- Third Department of Internal Medicine, Aichi Medical University, Japan
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47
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Soejima K, Yamaguchi K, Kohda E, Takeshita K, Ito Y, Mastubara H, Oguma T, Inoue T, Okubo Y, Amakawa K, Tateno H, Shiomi T. Longitudinal follow-up study of smoking-induced lung density changes by high-resolution computed tomography. Am J Respir Crit Care Med 2000; 161:1264-73. [PMID: 10764322 DOI: 10.1164/ajrccm.161.4.9905040] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
To evaluate the ability of high-resolution computed tomography (HRCT) to detect longitudinal changes in structural abnormalities caused by smoking, HRCT and pulmonary function tests were used to examine nonsmokers, current smokers, and past smokers annually for 5 yr. Inspiratory HRCT was taken for the upper, middle, and lower lung fields, while expiratory images were obtained for the upper and lower lung fields only. We estimated the three quantitative CT parameters including MLD (mean CT value), HIST (CT value with the most frequent appearance), and %LAA (relative area of low attenuation with CT values less than -912 HU). Most of the pulmonary function tests, excepting FEV(1), did not change annually, whereas many of the inspiratory HRCT parameters did. In nonsmokers, only %LAA in the middle or lower lung fields exhibited an annual increase. In current smokers, %LAA in the upper lung field was augmented, while inspiratory MLD or HIST in the middle or lower lung field became more positive. In past smokers, %LAA in any lung field examined increased. The annual change in %LAA in the upper lung field was larger for past smokers than nonsmokers, with little difference between past and current smokers. Expiratory CT parameters showed few annual changes in all groups. In conclusion, (1) aging increases airspace abnormalities, mainly in the lower lung field; (2) although continuous smoking worsens airspace abnormalities mainly in the upper portion of the lung, this trend does not seem to slow down even after smoking cessation; and (3) inspiratory HRCT images are superior to expiratory images for longitudinal estimation of structural abnormalities caused by aging and smoking.
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Affiliation(s)
- K Soejima
- Department of Medicine, School of Medicine, Keio University, Tokyo, Japan
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Kawase M, Kurikawa N, Miura N, Shiomi T, Ozawa C, Higashiyama S, Mizoguchi T, Yagi K. Immobilization of ligand-modified polyamidoamine dendrimer for cultivation of hepatoma cells. Artif Organs 2000; 24:18-22. [PMID: 10677152 DOI: 10.1046/j.1525-1594.2000.06443.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cationic polyamidoamine dendrimers are known to be highly branched cascade polymers. The core part of these polymers, tris(2-aminoethyl)amine, was immobilized onto polystyrene plates to which animal cells do not adhere. using photoreactive 4-(3-trifluoromethylazirino) benzoyl-N-succinimide (TDBA-OSu). Cells of a rat hepatoma cell line, H4-II-E-C3, adhered to a surface immobilized with a first-generation dendrimer probably through interactions between the terminal amino groups of the dendrimer and the cell membranes. The adhered cells were viable, could proliferate, and exhibited urea synthetic activity. The modification of the terminal amino groups with fructose increased the final number of cells obtained after 5 days of cultivation. Multigeneration dendrimers were prepared by repeated linkage of tris(2-aminoethyl)amine with the amino groups. Theoretically, the number of terminal amino groups available for ligand modification is twice as much for each generation of dendrimer growth. Cells cultivated on multigeneration fructose-modified dendrimers exhibited enhanced urea synthetic activity. The use of ligand-modified dendrimers is, therefore, considered to be very promising for the construction of bioartificial organs based on cultivation of the animal cells.
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Affiliation(s)
- M Kawase
- Faculty of Agriculture, Kagawa University, Takamatsu, Japan
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Koike M, Ikuta T, Miyasaka T, Shiomi T. Ku80 can translocate to the nucleus independent of the translocation of Ku70 using its own nuclear localization signal. Oncogene 1999; 18:7495-505. [PMID: 10602508 DOI: 10.1038/sj.onc.1203247] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ku antigen is a complex of Ku70 and Ku80 subunits and plays an important role in not only DNA double-strand breaks (DSB) repair and V(D)J recombination, but also in growth regulation. Ku is generally believed to always form and function as heterodimers on the basis of in vitro observations. Here we demonstrate that the localization of Ku80 does not completely coincide with that of Ku70. Ku70 and Ku80 were colocalized in the nucleus in the interphase but not in the late telophase/early G1 phase of the cell cycle. Since the in vivo function of Ku might be partially regulated by the control of its transport, we attempted to investigate the molecular mechanisms underlying the nuclear translocation of Ku. The nuclear translocation of Ku80 started during the late telophase/early G1 phase after the nuclear envelope was formed and this was preceded by the nuclear translocation of Ku70. Furthermore, we found that the Ku80 protein was transported to the nucleus without heterodimerization with Ku70. To understand in detail the mechanism of transport of Ku80, we attempted to identify the nuclear localization signal (NLS) of Ku80 and defined to a region spanning nine amino acid residues (positions 561 - 569). The Ku80 NLS was demonstrated to be mediated to the nuclear rim by two components of PTAC58 and PTAC97. All these findings support the idea that Ku80 can translocate to the nucleus using its own NLS independent of the translocation of Ku70.
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Affiliation(s)
- M Koike
- Genome Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
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Koike M, Awaji T, Kataoka M, Tsujimoto G, Kartasova T, Koike A, Shiomi T. Differential subcellular localization of DNA-dependent protein kinase components Ku and DNA-PKcs during mitosis. J Cell Sci 1999; 112 ( Pt 22):4031-9. [PMID: 10547363 DOI: 10.1242/jcs.112.22.4031] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Ku protein is a complex of two subunits, Ku70 and Ku80. Ku plays an important role in DNA-PKcs-dependent double-strand break repair and V(D)J recombination, and in growth regulation, which is DNA-PKcs-independent. We studied the expression and the subcellular localization of Ku and DNA-PKcs throughout the cell cycle in several established human cell lines. Using immunofluorescence analysis and confocal laser scanning microscopy, we detected Ku70 and Ku80 in the nuclei in interphase cells. In mitotic cells (1) most of Ku protein was found diffused in the cytoplasm, (2) a fraction was detected at the periphery of condensed chromosomes, (3) no Ku protein was present in the chromosome interior. Association of Ku with isolated chromosomes was also observed. On the other hand, DNA-PKcs was detected in the nucleus in interphase cells and not at the periphery of condensed chromosomes during mitosis. Using indirect immunoprecipitation, we found that throughout the cell cycle, Ku70 and Ku80 were present as heterodimers, some in complex with DNA-PKcs. Our findings suggest that the localization of Ku at the periphery of metaphase chromosomes might be imperative for a novel function of Ku in the G(2)/M phase, which does not require DNA-PKcs.
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Affiliation(s)
- M Koike
- Genome Research Group, National Institute of Radiological Sciences, Inage-ku, Chiba 263-8555, Japan.
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