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Tomita K, Yamasaki A, Katou R, Ikeuchi T, Touge H, Sano H, Tohda Y. Construction of a Diagnostic Algorithm for Diagnosis of Adult Asthma Using Machine Learning with Random Forest and XGBoost. Diagnostics (Basel) 2023; 13:3069. [PMID: 37835811 PMCID: PMC10572917 DOI: 10.3390/diagnostics13193069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
An evidence-based diagnostic algorithm for adult asthma is necessary for effective treatment and management. We present a diagnostic algorithm that utilizes a random forest (RF) and an optimized eXtreme Gradient Boosting (XGBoost) classifier to diagnose adult asthma as an auxiliary tool. Data were gathered from the medical records of 566 adult outpatients who visited Kindai University Hospital with complaints of nonspecific respiratory symptoms. Specialists made a thorough diagnosis of asthma based on symptoms, physical indicators, and objective testing, including airway hyperresponsiveness. We used two decision-tree classifiers to identify the diagnostic algorithms: RF and XGBoost. Bayesian optimization was used to optimize the hyperparameters of RF and XGBoost. Accuracy and area under the curve (AUC) were used as evaluation metrics. The XGBoost classifier outperformed the RF classifier with an accuracy of 81% and an AUC of 85%. A combination of symptom-physical signs and lung function tests was successfully used to construct a diagnostic algorithm on importance features for diagnosing adult asthma. These results indicate that the proposed model can be reliably used to construct diagnostic algorithms with selected features from objective tests in different settings.
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Affiliation(s)
- Katsuyuki Tomita
- Department of Respiratory Medicine, Yonago Medical Center, National Hospital Organization, Yonago 683-0006, Japan; (R.K.); (T.I.); (H.T.)
| | - Akira Yamasaki
- Division of Respiratory Medicine and Rheumatology, Department of Multidisciplinary Internal Medicine, School of Medicine, Tottori University, Yonago 683-8503, Japan;
| | - Ryohei Katou
- Department of Respiratory Medicine, Yonago Medical Center, National Hospital Organization, Yonago 683-0006, Japan; (R.K.); (T.I.); (H.T.)
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, Yonago Medical Center, National Hospital Organization, Yonago 683-0006, Japan; (R.K.); (T.I.); (H.T.)
| | - Hirokazu Touge
- Department of Respiratory Medicine, Yonago Medical Center, National Hospital Organization, Yonago 683-0006, Japan; (R.K.); (T.I.); (H.T.)
| | - Hiroyuki Sano
- Allergy Center, Kindai University Hospital, Osakasayama 589-8511, Japan;
| | - Yuji Tohda
- Department of Respiratory and Allergorogy, Kindai University, Osakasayama 589-8511, Japan;
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Inui G, Tomita K, Fukuki M, Touge H, Ikeuchi T, Hisatome I, Yamasaki A. Clinical characteristics for distinguishing between acute cardiogenic pulmonary edema and community-acquired pneumonia in elderly patients: a prospective observational study. Monaldi Arch Chest Dis 2023. [PMID: 37545323 DOI: 10.4081/monaldi.2023.2633] [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] [Received: 05/09/2023] [Accepted: 06/08/2023] [Indexed: 08/08/2023] Open
Abstract
Heart failure and pneumonia are highly prevalent in elderly patients. We conducted a study to evaluate the differences in the patterns of symptoms, laboratory findings, and computed tomography (CT) results in elderly patients with acute cardiogenic pulmonary edema (ACPE) and community-acquired pneumonia (CAP). From January 1, 2015 to December 31, 2017, we studied 140 patients aged >75 years who were diagnosed with ACPE and CAP. Symptoms, laboratory findings, mean ostial pulmonary vein (PV) diameter and patterns on CT images were assessed. The primary measures of diagnostic accuracy were assessed using the positive likelihood ratio (LR+). The cutoff value of ostial PVs for differentiating patients with ACPE from CAP was evaluated using the receiver operating characteristic (ROC) analysis. Ninety-three patients with ACPE, 36 with CAP, and 11 with complicated ACPE/CAP were included. In patients with ACPE, edema (LR+ 5.4) was a moderate factor for rule-in, and a high brain natriuretic peptide level (LR+ 4.2) was weak. In patients with CAP, cough (LR+ 5.7) and leukocytosis (LR+ 5.2) were moderate factors for rule-in, while fever (LR+ 3.8) and a high C-reactive protein level (LR+ 4.8) were weak factors. The mean diameter of ostial PVs in patients with ACPE was significantly larger than that of patients with CAP (15.8± 1.8 mm vs 9.6±1.5 mm, p< 0.01). ROC analysis revealed that an ostial PV diameter cutoff of 12.5 mm was strong evidence for distinguishing ACPE from CAP with an area under the ROC curve of 0.99 and LR+ 36.0. In conclusion, as ACPE and CAP have similar symptoms and laboratory findings, dilated ostial PVs were useful in characterizing CT images to distinguish ACPE from CAP.
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Affiliation(s)
- Genki Inui
- Division of Respiratory Medicine and Rheumatology, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori; Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago, Tottori.
| | - Katsuyuki Tomita
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago, Tottori.
| | - Masaharu Fukuki
- Department of Cardiologic Medicine, National Hospital Organization Yonago Medical Center, Yonago, Tottori.
| | - Hirokazu Touge
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago, Tottori.
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago, Tottori.
| | - Ichiro Hisatome
- Department of Cardiologic Medicine, National Hospital Organization Yonago Medical Center, Yonago, Tottori.
| | - Akira Yamasaki
- Division of Respiratory Medicine and Rheumatology, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori.
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Tomita K, Tokugawa S, Inui G, Moriyasu S, Ikeuchi T, Touge H, Tajima F. Granulocyte-colony-stimulating Factor-resistant Neutropenia and Polyneuropathy Presenting as Severe Complications of Sjögren's Syndrome. Intern Med 2022; 61:3287-3291. [PMID: 35342136 PMCID: PMC9683808 DOI: 10.2169/internalmedicine.9092-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Primary Sjögren's syndrome (pSS) has multi-dimensional manifestations, including neutropenia and polyneuropathy. We herein report a 76-year-old woman with pSS initially presenting as severe granulocyte-colony-stimulating factor (G-CSF)-refractory neutropenia and axonal sensorimotor polyneuropathies (SMP). Systemic glucocorticoid administration had reduced neutrophil-associated immunoglobulin G (NAIgG) on the neutrophil surface as detected using flow cytometry, resulting in the development of neutropenia. A patient with pSS concomitant with axonal SMP might show severe neutropenia as aggressive autoimmune disease. Neutropenia can be treated with systemic glucocorticoids based on the assessment of NAIgG on the neutrophil surface.
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Affiliation(s)
- Katsuyuki Tomita
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Japan
| | - Shinnosuke Tokugawa
- Center for Clinical Residency Program, National Hospital Organization Yonago Medical Center, Japan
| | - Genki Inui
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Japan
| | - Shotaro Moriyasu
- Division of Neurology, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Japan
| | - Hirokazu Touge
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Japan
| | - Fuminari Tajima
- Department of Hematology and Oncology, National Hospital Organization Yonago Medical Center, Japan
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Okada S, Tomita K, Inui G, Ikeuchi T, Touge H, Hasegawa J, Yamasaki A. Predictive Model for Adverse Events and Immune Response Based on the Production of Antibodies After the Second-Dose of the BNT162b2 mRNA Vaccine. Yonago Acta Med 2022; 65:63-69. [DOI: 10.33160/yam.2022.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 01/05/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Shinichi Okada
- Department of Pediatrics, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Katsuyuki Tomita
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Genki Inui
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Hirokazu Touge
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Junichi Hasegawa
- Department of Internal Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Akira Yamasaki
- Division of Respiratory Medicine and Rheumatology, Department of Multidisciplinary Internal Medicine, School of Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
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Tomita K, Okada S, Sugihara S, Ikeuchi T, Touge H, Hasegawa J, Yamasaki A. Physical Characteristics of Injection Site Pain After COVID-19 mRNA BNT162b2 Vaccination. Yonago Acta Med 2021; 64:339-344. [PMID: 34840513 DOI: 10.33160/yam.2021.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/08/2021] [Indexed: 11/05/2022]
Abstract
Background BNT162b2, an mRNA COVID-19 vaccine, was launched in many countries as an intramuscular vaccination for COVID-19 infection. Few studies have assessed the physical indications of pain at the immunization site. This study aimed to characterize pain at the injection site and investigate morphological attributes using ultrasound. Methods Forty-three of 211 healthcare workers who received a second dose of BNT162b2 between February 2021 and March 2021 were enrolled in the study. The mean age of the subjects was 40 years. We evaluated patients' pain at the injection site using the Numerical Rating Pain Scale (NRPS). We also assessed the thickness of the deltoid muscle fascia at the injection site by ultrasound. Bayesian robust correlation was employed to explore the relationship between the pain intensity scores and ultrasound measurements. Results All eligible subjects complained of pain at the injection site. A median pain onset of 8 hours post-vaccination and a median peak intensity score of 4 were reported. Onset of relief occurred after 2 days. Ultrasound images demonstrated a 2.5-fold increase in fascia thickness at the injection site without intramuscular echogenicity change in all subjects. A correlation was established between the NRPS score and the non-injection-to-injection-side ratio of fascia thickness at the injection site (rho = 0.66). Conclusion A sore arm was the most prevalent side effect of BNT162b2 vaccination and could be attributed to temporal fasciitis.
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Affiliation(s)
- Katsuyuki Tomita
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Shinichi Okada
- Department of Pediatrics, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Shuji Sugihara
- Department of Radiology, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Hirokazu Touge
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Junichi Hasegawa
- Department of Internal Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
| | - Akira Yamasaki
- Division of Medical Oncology and Molecular Respirology, School of Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
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Mano T, Sato K, Ikeuchi T, Toda T, Iwatsubo T, Iwata A. Peripheral Blood BRCA1 Methylation Positively Correlates with Major Alzheimer's Disease Risk Factors. J Prev Alzheimers Dis 2021; 8:477-482. [PMID: 34585223 DOI: 10.14283/jpad.2021.31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Recent biomarker studies demonstrated that the central nervous system (CNS) environment can be observed from peripherally-derived samples. In a previous study, we demonstrated significant hypomethylation of the BRCA1 promoter region in neuronal cells from post-mortem brains of Alzheimer's disease patients through neuron-specific methylome analysis. Thus, we investigate the methylation changes in the BRCA1 promoter region in the blood samples. OBJECTIVES To analyze the methylation level of the BRCA1 promoter in peripheral blood from AD patients and normal controls. DESIGN, SETTING, PARTICIPANTS Genomic DNA samples from peripheral blood were obtained from the J-ADNI repository, and their biomarker data were obtained J-ADNI from the National Bioscience Database Center. Genomic DNA samples from an independent cohort for validation was obtained from Niigata University Hospital (Niigata, Japan). Amyloid positivity was defied by visual inspection of amyloid PET or a CSF Aβ42 value ≤ 333 pg/mL at the baseline. MEASUREMENTS Methylation level of the BRCA1 promoter was analyzed by pyrosequencing. RESULTS Compared to normal controls, methylation of the BRCA1 promoter in AD patients was not significantly changed; however, in AD patients, it showed a positive correlation with AD risk factors. CONCLUSIONS Our data confirmed the importance of cell-type specific methylome analysis and also suggested that environmental changes in the CNS can be detected by observing the peripheral blood, implying that the peripheral BRCA1 methylation level can be a surrogate for AD.
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Affiliation(s)
- T Mano
- Tatsuo Mano, Department of Neurology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-8655, Japan, , Phone +81-3-5800-8672, Fax +81-3-5800-6548
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Senda M, Ishii K, Ito K, Ikeuchi T, Matsuda H, Iwatsubo T, Iwata A, Ihara R, Suzuki K, Kasuga K, Ikari Y, Niimi Y, Arai H, Tamaoka A, Arahata Y, Itoh Y, Tachibana H, Ichimiya Y, Washizuka S, Odawara T, Ishii K, Ono K, Yokota T, Nakanishi A, Matsubara E, Mori H, Shimada H. A Japanese Multicenter Study on PET and Other Biomarkers for Subjects with Potential Preclinical and Prodromal Alzheimer's Disease. J Prev Alzheimers Dis 2021; 8:495-502. [PMID: 34585225 DOI: 10.14283/jpad.2021.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND PET (positron emission tomography) and CSF (cerebrospinal fluid) provide the "ATN" (Amyloid, Tau, Neurodegeneration) classification and play an essential role in early and differential diagnosis of Alzheimer's disease (AD). OBJECTIVE Biomarkers were evaluated in a Japanese multicenter study on cognitively unimpaired subjects (CU) and early (E) and late (L) mild cognitive impairment (MCI) patients. MEASUREMENTS A total of 38 (26 CU, 7 EMCI, 5 LMCI) subjects with the age of 65-84 were enrolled. Amyloid-PET and FDG-PET as well as structural MRI were acquired on all of them, with an additional tau-PET with 18F-flortaucipir on 15 and CSF measurement of Aβ1-42, P-tau, and T-tau on 18 subjects. Positivity of amyloid and tau was determined based on the positive result of either PET or CSF. RESULTS The amyloid positivity was 13/38, with discordance between PET and CSF in 6/18. Cortical tau deposition quantified with PET was significantly correlated with CSF P-tau, in spite of discordance in the binary positivity between visual PET interpretation and CSF P-tau in 5/8 (PET-/CSF+). Tau was positive in 7/9 amyloid positive and 8/16 amyloid negative subjects who underwent tau measurement, respectively. Overall, a large number of subjects presented quantitative measures and/or visual read that are close to the borderline of binary positivity, which caused, at least partly, the discordance between PET and CSF in amyloid and/or tau. Nine subjects presented either tau or FDG-PET positive while amyloid was negative, suggesting the possibility of non-AD disorders. CONCLUSION Positivity rate of amyloid and tau, together with their relationship, was consistent with previous reports. Multicenter study on subjects with very mild or no cognitive impairment may need refining the positivity criteria and cutoff level as well as strict quality control of the measurements.
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Affiliation(s)
- M Senda
- Michio Senda, Division of Molecular Imaging Research Kobe City Medical Center General Hospital (KCGH), 2-1-1 Minatojima-Minamimachi, Chuo-ku, Kobe 650-0047 Japan, E-mail: , Phone: 81-78-304-5212, Fax: 81-78-304-5201
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Matsuo S, Okamoto M, Ikeuchi T, Zaizen Y, Inomoto A, Haraguchi R, Mori S, Sasaki R, Nouno T, Tanaka T, Hoshino T, Tsuda T. Early Intervention of Pulmonary Rehabilitation for Fibrotic Interstitial Lung Disease Is a Favorable Factor for Short-Term Improvement in Health-Related Quality of Life. J Clin Med 2021; 10:jcm10143153. [PMID: 34300319 PMCID: PMC8305639 DOI: 10.3390/jcm10143153] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/13/2021] [Accepted: 07/14/2021] [Indexed: 11/16/2022] Open
Abstract
Patients with fibrosing interstitial lung disease (FILD) have poor health-related quality of life (HRQOL). We analyzed predictors of short-term improvement of HRQOL after starting pulmonary rehabilitation (PR) in moderate to severe FILD patients. This study involved 28 consecutive patients with FILD (20 males, median age of 77.5 years), who participated in PR program of our hospital for >6 weeks. The St. George’s Respiratory Questionnaire (SGRQ) score and the 6-min walk distance (6MWD) were evaluated before and after PR, and the predictors of efficacy of PR were analyzed. The duration from diagnosis of FILD to start of PR showed a positive correlation with the increase in the SGRQ score, and the baseline SGRQ score showed a negative correlation with increase in the 6MWD. The FILD subtype, modified Medical Research Council score, and treatment history were not associated with the endpoints. According to the receiver operating characteristic curve (ROC) analyses, starting PR within 514 days after diagnosis of FILD was a significant favorable predictor of improvement in the SGRQ total score more than a minimal clinically important difference of 4. In this study, early intervention of PR and lower SGRQ score were associated with the favorable response to PR. PR for FILD should be initiated early before the disease becomes severe.
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Affiliation(s)
- Satoshi Matsuo
- Kirigaoka Tsuda Hospital, Kirigaoka 3-9-20, Kokura-kita-ku, Kitakyushu, Fukuoka 802-0052, Japan; (S.M.); (T.I.); (S.M.); (R.S.); (T.T.)
| | - Masaki Okamoto
- Department of Respirology and Clinical Research Center, National Hospital Organization Kyushu Medical Center, Jigyohama 1-8-1, Chuou-ku, Fukuoka 810-0065, Japan; (T.N.); (T.T.)
- Division of Respirology, Neurology, and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Ashahi-machi 67, Kurume, Fukuoka 830-0011, Japan; (Y.Z.); (T.H.)
- Correspondence: ; Tel.: +81-942-31-7560
| | - Tomoyuki Ikeuchi
- Kirigaoka Tsuda Hospital, Kirigaoka 3-9-20, Kokura-kita-ku, Kitakyushu, Fukuoka 802-0052, Japan; (S.M.); (T.I.); (S.M.); (R.S.); (T.T.)
| | - Yoshiaki Zaizen
- Division of Respirology, Neurology, and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Ashahi-machi 67, Kurume, Fukuoka 830-0011, Japan; (Y.Z.); (T.H.)
| | - Atsushi Inomoto
- Department of Rehabilitation, Kyushu Nutrition University, Kuzuharatakamatsu 1-5-1, Kokura-minami-ku, Kitakyushu, Fukuoka 800-0298, Japan;
| | - Remi Haraguchi
- Department of Rehabilitation, National Hospital Organization Kyushu Medical Center, Jigyohama 1-8-1, Chuou-ku, Fukuoka 810-0065, Japan;
| | - Shunichiro Mori
- Kirigaoka Tsuda Hospital, Kirigaoka 3-9-20, Kokura-kita-ku, Kitakyushu, Fukuoka 802-0052, Japan; (S.M.); (T.I.); (S.M.); (R.S.); (T.T.)
| | - Retsu Sasaki
- Kirigaoka Tsuda Hospital, Kirigaoka 3-9-20, Kokura-kita-ku, Kitakyushu, Fukuoka 802-0052, Japan; (S.M.); (T.I.); (S.M.); (R.S.); (T.T.)
| | - Takashi Nouno
- Department of Respirology and Clinical Research Center, National Hospital Organization Kyushu Medical Center, Jigyohama 1-8-1, Chuou-ku, Fukuoka 810-0065, Japan; (T.N.); (T.T.)
| | - Tomohiro Tanaka
- Department of Respirology and Clinical Research Center, National Hospital Organization Kyushu Medical Center, Jigyohama 1-8-1, Chuou-ku, Fukuoka 810-0065, Japan; (T.N.); (T.T.)
| | - Tomoaki Hoshino
- Division of Respirology, Neurology, and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Ashahi-machi 67, Kurume, Fukuoka 830-0011, Japan; (Y.Z.); (T.H.)
| | - Toru Tsuda
- Kirigaoka Tsuda Hospital, Kirigaoka 3-9-20, Kokura-kita-ku, Kitakyushu, Fukuoka 802-0052, Japan; (S.M.); (T.I.); (S.M.); (R.S.); (T.T.)
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Tomita K, Ikeuchi T, Touge H, Nakamura Y, Yamamoto Y, Takeuchi H, Yamasaki A. Characteristic appearance of the oropharynx in patients with postnasal drip (PND)-induced cough. Clin Respir J 2021; 15:568-573. [PMID: 33683818 DOI: 10.1111/crj.13351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 03/04/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Post-nasal drip (PND)-induced cough is a common cause of chronic cough. However, there is little known about the characteristic physical findings of this condition. OBJECTIVES We investigated views of the pharyngeal wall in patients with PND-induced cough using a handy endoscopic images. METHODS The subjects were 135 consecutive patients referred to our hospital with a sensation of something "dripping down the throat" as one of their symptoms. Physical findings for the oropharynx were examined using Wi-Fi endoscope camera. The difference in probability of symptoms in patients with acute cough and those with subacute/chronic cough was assessed using a Bayesian Fisher exact test on a 2 × 2 table. RESULTS Among the patients, 105 (78%) complained of cough, 78 (58%) of acute cough, 20 (15%) of subacute cough, and 7 (5%) of chronic cough; and 71 (53%) had coexisting asthma. Using Bayesian inference, a sore or scratchy throat and fever were more common in patients with acute cough than in those with subacute/chronic cough. In endoscopic images of the oropharynx, a reddish curtain sign on the posterior pharyngeal wall behind the palatopharyngeal arch was found in 121 patients (90%). CONCLUSION Patients with acute PND-induced cough have a component of acute upper respiratory infection, because of high probability of a sore or scratchy throat and fever as symptom. A reddish curtain sign may be a useful finding for identifying PND-induced cough in these cases.
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Affiliation(s)
- Katsuyuki Tomita
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Centre, Tottori, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Centre, Tottori, Japan
| | - Hirokazu Touge
- Department of Respiratory Medicine, National Hospital Organization Yonago Medical Centre, Tottori, Japan
| | - Yosuke Nakamura
- Division of Otolaryngology, Head and Neck Surgery, Department of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Tottori, Japan
| | - Yuko Yamamoto
- Division of Otolaryngology, Head and Neck Surgery, Department of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Tottori, Japan
| | - Hiromi Takeuchi
- Division of Otolaryngology, Head and Neck Surgery, Department of Sensory and Motor Organs, School of Medicine, Tottori University Faculty of Medicine, Tottori, Japan
| | - Akira Yamasaki
- Division of Medical Oncology and Molecular Respirology, Department of Multidisciplinary Internal Medicine, School of Medicine, Tottori University Faculty of Medicine, Tottori, Japan
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Kato R, Ikeuchi T, Tomita K, Yamasaki A. Adult-onset Still's disease with concurrent thrombotic thrombocytopenic purpura: case report and literature review. BMJ Case Rep 2020; 13:13/9/e235786. [PMID: 32988976 DOI: 10.1136/bcr-2020-235786] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Thrombotic thrombocytopenic purpura (TTP) is rare complication resulting from adult-onset Still's disease (AOSD). We report the case of a 69-year-old Japanese man who initially presented with fever and joint pain and was diagnosed as having concurrent AOSD with TTP 1 month later. He had extremely high ferritin levels (32 696 ng/mL). He initially responded to plasma exchange but subsequently died of septic shock. AOSD accompanied by extremely high ferritin levels might be considered a sign of concurrent TTP.
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Affiliation(s)
- Ryohei Kato
- Division of Respiratory Medicine and Rheumatology, Department of Multidisclplinary Internal Medicine, Faculty of Medicine, Tottori University Hospital, Yonago, Tottori, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, Yonago Medical Centre, National Hospital Organisation Yonago Medical Center, Yonago, Tottori, Japan
| | - Katsuyuki Tomita
- Department of Respiratory Medicine, Yonago Medical Centre, National Hospital Organisation Yonago Medical Center, Yonago, Tottori, Japan
| | - Akira Yamasaki
- Division of Respiratory Medicine and Rheumatology, Department of Multidisclplinary Internal Medicine, Faculty of Medicine, Tottori University Hospital, Yonago, Tottori, Japan
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Tanaka H, Toyoshima Y, Kawakatsu S, Kobayashi R, Yokota O, Terada S, Kuroda S, Miura T, Higuchi Y, Otsu H, Sanpei K, Otani K, Ikeuchi T, Onodera O, Kakita A, Takahashi H. Morphological characterisation of glial and neuronal tau pathology in globular glial tauopathy (Types II and III). Neuropathol Appl Neurobiol 2019; 46:344-358. [DOI: 10.1111/nan.12581] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 09/03/2019] [Indexed: 12/11/2022]
Affiliation(s)
- H. Tanaka
- Department of Pathology Brain Research Institute Niigata University Niigata Japan
| | - Y. Toyoshima
- Department of Pathology Brain Research Institute Niigata University Niigata Japan
| | - S. Kawakatsu
- Department of Neuropsychiatry Aizu Medical Center Fukushima Medical University Aizu Fukushima Japan
| | - R. Kobayashi
- Department of Psychiatry Yamagata University School of Medicine Yamagata Japan
| | - O. Yokota
- Department of Psychiatry Kinoko Espoir Hospital Okayama Japan
| | - S. Terada
- Department of Neuropsychiatry Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
| | - S. Kuroda
- Department of Psychiatry Zikei Institute of Psychiatry Okayama Japan
| | - T. Miura
- Department of Neurology Brain Research Institute Niigata University Niigata Japan
| | - Y. Higuchi
- Department of Neurology Brain Research Institute Niigata University Niigata Japan
| | - H. Otsu
- Department of Neurology Brain Research Institute Niigata University Niigata Japan
| | - K. Sanpei
- Department of Neurology Sado General Hospital Niigata Japan
| | - K. Otani
- Department of Psychiatry Yamagata University School of Medicine Yamagata Japan
| | - T. Ikeuchi
- Department of Molecular Genetics Brain Research Institute Niigata University Niigata Japan
| | - O. Onodera
- Department of Neurology Brain Research Institute Niigata University Niigata Japan
| | - A. Kakita
- Department of Pathology Brain Research Institute Niigata University Niigata Japan
| | - H. Takahashi
- Department of Pathology Brain Research Institute Niigata University Niigata Japan
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12
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Tomita K, Nagao R, Touge H, Ikeuchi T, Sano H, Yamasaki A, Tohda Y. Deep learning facilitates the diagnosis of adult asthma. Allergol Int 2019; 68:456-461. [PMID: 31153755 DOI: 10.1016/j.alit.2019.04.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/12/2019] [Accepted: 04/23/2019] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND We explored whether the use of deep learning to model combinations of symptom-physical signs and objective tests, such as lung function tests and the bronchial challenge test, would improve model performance in predicting the initial diagnosis of adult asthma when compared to the conventional machine learning diagnostic method. METHODS The data were obtained from the clinical records on prospective study of 566 adult out-patients who visited Kindai University Hospital for the first time with complaints of non-specific respiratory symptoms. Asthma was comprehensively diagnosed by specialists based on symptom-physical signs and objective tests. Model performance metrics were compared to logistic analysis, support vector machine (SVM) learning, and the deep neural network (DNN) model. RESULTS For the diagnosis of adult asthma based on symptom-physical signs alone, the accuracy of the DNN model was 0.68, whereas that for the SVM was 0.60 and for the logistic analysis was 0.65. When adult asthma was diagnosed based on symptom-physical signs, biochemical findings, lung function tests, and the bronchial challenge test, the accuracy of the DNN model increased to 0.98 and was significantly higher than the 0.82 accuracy of the SVM and the 0.94 accuracy of the logistic analysis. CONCLUSIONS DNN is able to better facilitate diagnosing adult asthma, compared with classical machine learnings, such as logistic analysis and SVM. The deep learning models based on symptom-physical signs and objective tests appear to improve the performance for diagnosing adult asthma.
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Affiliation(s)
- Katsuyuki Tomita
- Department of Respiratory Medicine, Yonago Medical Centre, Tottori, Japan.
| | - Ryota Nagao
- Department of Respiratory Medicine, Yonago Medical Centre, Tottori, Japan
| | - Hirokazu Touge
- Department of Respiratory Medicine, Yonago Medical Centre, Tottori, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, Yonago Medical Centre, Tottori, Japan
| | - Hiroyuki Sano
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Akira Yamasaki
- Division of Medical Oncology and Molecular Respirology, Department of Multidisciplinary Internal Medicine, School of Medicine, Tottori University Faculty of Medicine, Tottori, Japan
| | - Yuji Tohda
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
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13
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Tokuyasu H, Ishikawa S, Sakai H, Ikeuchi T, Miura H. Single pembrolizumab treatment causing profound durable response in a patient with pulmonary pleomorphic carcinoma. Respir Med Case Rep 2019; 28:100879. [PMID: 31249776 PMCID: PMC6586952 DOI: 10.1016/j.rmcr.2019.100879] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 12/12/2022] Open
Abstract
We report a case of a 73-year-old man diagnosed with pulmonary pleomorphic carcinoma who showed profound durable response after a single treatment with pembrolizumab. The patient underwent a diagnostic workup in our hospital due to a hoarseness of voice. Chest computed tomography revealed a massive pulmonary tumor in the left upper lobe and multiple nodules in the both lung fields. Histological examination of a transbronchial lung biopsy specimen revealed pulmonary pleomorphic carcinoma. First-line treatment with pembrolizumab was discontinued after a single administration due to treatment-related pneumonitis. However, durable response has been observed over 17 months to date.
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Affiliation(s)
- Hirokazu Tokuyasu
- Divisions of Respiratory Medicine, Matsue Red Cross Hospital, Shimane, Japan
| | - Soichiro Ishikawa
- Divisions of Respiratory Medicine, Matsue Red Cross Hospital, Shimane, Japan
| | - Hiromitsu Sakai
- Divisions of Respiratory Medicine, Matsue Red Cross Hospital, Shimane, Japan
| | - Tomoyuki Ikeuchi
- Divisions of Respiratory Medicine, Matsue Red Cross Hospital, Shimane, Japan
| | - Hiroshi Miura
- Divisions of Pathology, Matsue Red Cross Hospital, Shimane, Japan
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14
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Ikeuchi T, Tokuyasu H, Ishikawa S. Successful Treatment of Lung Adenocarcinoma with Epidermal Growth Factor Receptor Compound Mutations Involving Exon 19 Deletion and Exon 20 Insertion by Afatinib. Intern Med 2019; 58:101-104. [PMID: 30606938 PMCID: PMC6367085 DOI: 10.2169/internalmedicine.0927-18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A 70-year-old woman was referred to our hospital after a nodular shadow was noted on chest X-ray. Chest computed tomography showed a pulmonary mass in the right upper lobe, and brain magnetic resonance imaging revealed a right-sided frontal lobe tumor. A histological examination of a transbronchial lung biopsy specimen revealed adenocarcinoma with epidermal growth factor receptor mutations involving both exon 19 deletion and exon 20 insertion. After stereotactic radiotherapy for brain metastasis, the patient was treated with afatinib, which resulted in a complete response. We observed a case in which a patient had non-small cell lung cancer with compound EGFR mutations involving both exon 19 deletion and exon 20 insertion mutations that responded well to afatinib therapy.
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Affiliation(s)
- Tomoyuki Ikeuchi
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
| | - Hirokazu Tokuyasu
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
| | - Soichiro Ishikawa
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
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15
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Touge H, Tomita K, Fukuki M, Nagao R, Ikeuchi T, Sakai H, Yamasaki A, Shimizu E. Characteristics of images from CT scans in elderly patients with acute cardiogenic pulmonary edema. Imaging 2018. [DOI: 10.1183/13993003.congress-2018.pa861] [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: 11/05/2022] Open
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16
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Konno T, Miura T, Harriott AM, Mezaki N, Edwards ES, Rademakers R, Ross OA, Meschia JF, Ikeuchi T, Wszolek ZK. Partial loss of function of colony-stimulating factor 1 receptor in a patient with white matter abnormalities. Eur J Neurol 2018; 25:875-881. [PMID: 29509319 DOI: 10.1111/ene.13611] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/28/2018] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND PURPOSE Mutations in colony-stimulating factor 1 receptor (CSF1R) cause adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP). Patients with ALSP can be misdiagnosed as having acute ischemic stroke due to hyperintensity lesions on diffusion-weighted magnetic resonance imaging. Mutant CSF1R proteins identified in ALSP show a complete loss of autophosphorylation of CSF1R. METHODS We conducted mutation screening of CSF1R in 123 patients with definite acute ischemic cerebrovascular syndrome and positive family history of stroke. The pathogenicity of identified variants was evaluated using functional analyses. The levels of autophosphorylation of CSF1R in response to treatment with ligands of CSF1R were examined in cells transfected with wild-type and mutant CSF1R. RESULTS We identified eight CSF1R variants, six were known non-pathogenic polymorphisms, whereas the other two were missense variants inducing substitution of amino acid residues (p.Glu573Lys and p.Gly747Arg). Functional assay showed that the levels of autophosphorylation of p.Gly747Arg were similar to those of wild-type when treated with ligands. The autophosphorylation of p.Glu573Lys was detectable, but significantly decreased compared with those of wild-type CSF1R (P < 0.001, two-way anova with Bonferroni). The clinical presentation of the patient with p.Glu573Lys was consistent with cerebral embolism. The patient did not have typical clinical findings of ALSP. However, periventricular white matter abnormalities, unrelated to the recent infarct, were evident on brain magnetic resonance imaging. CONCLUSIONS In contrast to ALSP-associated missense mutations, CSF1R p.Glu573Lys variant in a patient with acute ischemic cerebrovascular syndrome showed a partial loss of autophosphorylation of CSF1R; its clinical significance warrants further investigation.
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Affiliation(s)
- T Konno
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.,Department of Neurology, Brain Research Institute, Niigata University, Niigata
| | - T Miura
- Department of Neurology, Brain Research Institute, Niigata University, Niigata.,Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
| | - A M Harriott
- Department of Neurology, Massachusetts General Hospital, Boston, MA
| | - N Mezaki
- Department of Neurology, Brain Research Institute, Niigata University, Niigata.,Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
| | - E S Edwards
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - R Rademakers
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - O A Ross
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - J F Meschia
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - T Ikeuchi
- Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
| | - Z K Wszolek
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
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17
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Konno T, Yoshida K, Mizuta I, Mizuno T, Kawarai T, Tada M, Nozaki H, Ikeda SI, Onodera O, Wszolek ZK, Ikeuchi T. Diagnostic criteria for adult-onset leukoencephalopathy with axonal spheroids and pigmented glia due to CSF1R mutation. Eur J Neurol 2017; 25:142-147. [PMID: 28921817 DOI: 10.1111/ene.13464] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [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: 05/15/2017] [Accepted: 09/07/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND PURPOSE To establish and validate diagnostic criteria for adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) due to colony-stimulating factor 1 receptor (CSF1R) mutation. METHODS We developed diagnostic criteria for ALSP based on a recent analysis of the clinical characteristics of ALSP. These criteria provide 'probable' and 'possible' designations for patients who do not have a genetic diagnosis. To verify its sensitivity and specificity, we retrospectively applied our criteria to 83 ALSP cases who had CSF1R mutations (24 of these were analyzed at our institutions and the others were identified from the literature), 53 cases who had CSF1R mutation-negative leukoencephalopathies and 32 cases who had cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) with NOTCH3 mutations. RESULTS Among the CSF1R mutation-positive cases, 50 cases (60%) were diagnosed as 'probable' and 32 (39%) were diagnosed as 'possible,' leading to a sensitivity of 99% if calculated as a ratio of the combined number of cases who fulfilled 'probable' or 'possible' to the total number of cases. With regard to specificity, 22 cases (42%) with mutation-negative leukoencephalopathies and 28 (88%) with CADASIL were correctly excluded using these criteria. CONCLUSIONS These diagnostic criteria are very sensitive for diagnosing ALSP with sufficient specificity for differentiation from CADASIL and moderate specificity for other leukoencephalopathies. Our results suggest that these criteria are useful for the clinical diagnosis of ALSP.
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Affiliation(s)
- T Konno
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.,Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - K Yoshida
- Department of Brain Disease Research, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - I Mizuta
- Department of Neurology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
| | - T Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
| | - T Kawarai
- Department of Clinical Neuroscience, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - M Tada
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - H Nozaki
- Department of Medical Technology, School of Health Sciences Faculty of Medicine, Niigata University, Niigata, Japan
| | - S-I Ikeda
- Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - O Onodera
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Z K Wszolek
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - T Ikeuchi
- Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
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18
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Ishiguro T, Kasuga K, Saito K, Mezaki N, Miura T, Onodera O, Ikeuchi T. The effect of neuronal activity on β-amyloid precursor protein (APP) processing in cultured cells. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1868] [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: 11/25/2022]
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19
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Tokutake T, Kasuga K, Ishiguro T, Miura T, Mezaki N, Hirai K, Onodera O, Ikeuchi T. Characteristic clinical presentations and CSF biomarker features in patients with semantic dementia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Mezaki N, Miura T, Ogaki K, Eriguchi M, Mizuno Y, Komatsu K, Yamazaki H, Ono N, Kawajiri S, Yamasaki R, Nozaki H, Kasuga K, Okuma Y, Kira J, Hara H, Onodera O, Ikeuchi T. LMNB1-related adult-onset autosomal dominant leukodystrophy: Genetic and clinical studies of four Japanese families. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Ikeuchi T, Kobayashi E, Fujiwara Y. THE ROLE OF SOCIAL CONTACT IN THE ASSOCIATION OF AGE AND WELL-BEING. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4413] [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: 11/14/2022] Open
Affiliation(s)
- T. Ikeuchi
- Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - E. Kobayashi
- Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Y. Fujiwara
- Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
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22
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Ikeuchi T, Lang F, Osada H. FUTURE TIME PERSPECTIVE OF OLDER GERMANS AND JAPANESE LIVING ALONE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1232] [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: 11/13/2022] Open
Affiliation(s)
- T. Ikeuchi
- Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,
| | - F.R. Lang
- Institute of Psychogerontology, Friedrich-Alexander-University of Erlangen- Nürnberg, Nuremberg, Germany,
| | - H. Osada
- Graduate School of Gerontology, J. F. Oberlin University, Tokyo, Japan
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23
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Abstract
A 56-year-old woman, without any immunocompromising diseases, was referred to our hospital because of a recurrence of pyogenic spondylitis. Computed tomography revealed multiple osteolytic changes in the whole body. Vertebral magnetic resonance imaging revealed osteomyelitis and spondylitis. Mycobacterium scrofulaceum was detected in sputum cultures, in abscesses from the right knee, and in a subcutaneous forehead abscess. Therefore, the patient was diagnosed with disseminated Mycobacterium scrofulaceum infection. The patient was treated with rifampicin, ethambutol, and clarithromycin, which resulted in symptomatic relief and radiological improvement. We herein report a rare case of disseminated Mycobacterium scrofulaceum infection in an immunocompetent host.
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Affiliation(s)
- Yu Takemoto
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
| | - Hirokazu Tokuyasu
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
| | - Tomoyuki Ikeuchi
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
| | - Hirofumi Nakazaki
- Department of Respiratory Medicine, Matsue Red Cross Hospital, Japan
| | | | - Suguru Kakite
- Department of Radiology, Matsue Red Cross Hospital, Japan
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24
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Konno T, Yoshida K, Mizuno T, Kawarai T, Tada M, Nozaki H, Ikeda SI, Nishizawa M, Onodera O, Wszolek ZK, Ikeuchi T. Clinical and genetic characterization of adult-onset leukoencephalopathy with axonal spheroids and pigmented glia associated with CSF1R mutation. Eur J Neurol 2016; 24:37-45. [PMID: 27680516 PMCID: PMC5215554 DOI: 10.1111/ene.13125] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 08/09/2016] [Indexed: 01/13/2023]
Abstract
Background and purpose The clinical characteristics of colony stimulating factor 1 receptor (CSF1R) related adult‐onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) have been only partially elucidated. Methods Clinical data from CSF1R mutation carriers who had been seen at our institutions or reported elsewhere were collected and analysed using a specific investigation sheet to standardize the data. Results In all, 122 cases from 90 families with CSF1R mutations were identified. The mean age of onset was 43 years (range 18–78 years), the mean age at death was 53 years (range 23–84 years) and the mean disease duration was 6.8 years (range 1–29 years). Women had a significantly younger age of onset than men (40 vs. 47 years, P = 0.0006, 95% confidence interval 3.158–11.177). There was an age‐dependent penetrance that was significantly different between the sexes (P = 0.0013). Motor dysfunctions were the most frequent initial symptom in women whose diseases began in their 20s. Thinning of the corpus callosum, abnormal signalling in pyramidal tracts, diffusion‐restricted lesions and calcifications in the white matter were characteristic imaging findings of ALSP. The calcifications were more frequently reported in our case series than in the literature (54% vs. 3%). Seventy‐nine per cent of the mutations were located in the distal part of the tyrosine kinase domain of CSF1R (102 cases). There were no apparent phenotype−genotype correlations. Conclusions The characteristics of ALSP were clarified. The phenotype of ALSP caused by CSF1R mutations is affected by sex.
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Affiliation(s)
- T Konno
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.,Department of Neurology, Niigata University, Niigata, Japan
| | - K Yoshida
- Department of Brain Disease Research, Shinshu University School of Medicine, Matsumoto, Japan
| | - T Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Kawarai
- Department of Clinical Neuroscience, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - M Tada
- Department of Neurology, Niigata University, Niigata, Japan
| | - H Nozaki
- Department of Medical Technology, School of Health Sciences Faculty of Medicine, Niigata University, Niigata, Japan
| | - S-I Ikeda
- Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
| | - M Nishizawa
- Department of Neurology, Niigata University, Niigata, Japan
| | - O Onodera
- Department of Molecular Neuroscience, Niigata University, Niigata, Japan
| | - Z K Wszolek
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - T Ikeuchi
- Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
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25
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Konno T, Broderick DF, Mezaki N, Isami A, Kaneda D, Tashiro Y, Tokutake T, Keegan BM, Woodruff BK, Miura T, Nozaki H, Nishizawa M, Onodera O, Wszolek ZK, Ikeuchi T. Diagnostic Value of Brain Calcifications in Adult-Onset Leukoencephalopathy with Axonal Spheroids and Pigmented Glia. AJNR Am J Neuroradiol 2016; 38:77-83. [PMID: 27633805 DOI: 10.3174/ajnr.a4938] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 07/20/2016] [Indexed: 11/07/2022]
Abstract
Adult-onset leukoencephalopathy with axonal spheroids and pigmented glia is a rare neurodegenerative disease resulting from mutations in the colony stimulating factor 1 receptor gene. Accurate diagnosis can be difficult because the associated clinical and MR imaging findings are nonspecific. We present 9 cases with intracranial calcifications distributed in 2 brain regions: the frontal white matter adjacent to the anterior horns of the lateral ventricles and the parietal subcortical white matter. Thin-section (1-mm) CT scans are particularly helpful in detection due to the small size of the calcifications. These calcifications had a symmetric "stepping stone appearance" in the frontal pericallosal regions, which was clearly visible on reconstructed sagittal CT images. Intrafamilial variability was seen in 2 of the families, and calcifications were seen at birth in a single individual. These characteristic calcification patterns may assist in making a correct diagnosis and may contribute to understanding of the pathogenesis of leukoencephalopathy.
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Affiliation(s)
- T Konno
- From the Departments of Neurology (T.K., Z.K.W.).,Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - D F Broderick
- Radiology (D.F.B.), Mayo Clinic Florida, Jacksonville, Florida
| | - N Mezaki
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - A Isami
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - D Kaneda
- Department of Neurology (D.K.), Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan.,Department of Neurology (D.K.), Osaka Red Cross Hospital, Osaka, Japan
| | - Y Tashiro
- Department of Neurology (Y.T.), National Hospital Organization Mito Medical Center, Ibaraki, Japan
| | - T Tokutake
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - B M Keegan
- Department of Neurology (B.M.K.), Mayo Clinic Rochester, Rochester, Minnesota
| | - B K Woodruff
- Department of Neurology (B.K.W.), Mayo Clinic Arizona, Scottsdale, Arizona
| | - T Miura
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - H Nozaki
- Medical Technology (H.N.), School of Health Sciences Faculty of Medicine, Niigata University, Niigata, Japan
| | - M Nishizawa
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - O Onodera
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - Z K Wszolek
- From the Departments of Neurology (T.K., Z.K.W.)
| | - T Ikeuchi
- Molecular Genetics (T.I.), Brain Research Institute
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26
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Espulgar W, Aoki W, Ikeuchi T, Mita D, Saito M, Lee JK, Tamiya E. Centrifugal microfluidic platform for single-cell level cardiomyocyte-based drug profiling and screening. Lab Chip 2015. [PMID: 26215661 DOI: 10.1039/c5lc00652j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Drug screening and profiling is an important phase in drug discovery, development, and marketing. However, some profiling tests are not routinely done because of the needed additional technical skills and costly maintenance, which leads to cases of unexpected side effects or adverse drug reactions (ADRs). This study presents the design and operation of a microfluidic chip for single-cell level drug screening and profiling as an alternative platform for this purpose. Centrifugation was utilized to trap isolated single and groups of primary cultured neonatal rat cardiomyocytes in the same chip. In the off-spin operation of the chip, the cells can be observed under a microscope and movies of the beat motion can be recorded. The beat profiles of the cells were generated by image correlation analysis of the recorded video to study the contractile characteristics (beating rate, beating strength, and inter-beat duration). By utilizing this non-invasive tool, long term continuous monitoring, right after trapping, was made possible and cell growth and dynamics were successfully observed in the chip. Media and liquid replacement does not require further centrifugation but instead utilizes capillary flow only. The effect of carbachol (100 μM) and isoproterenol (4 μg mL(-1)) on single cells and groups of cells was demonstrated and the feature for immunostaining (β-actin) applicability of the chip was revealed. Furthermore, these findings can be helpful for the headway of non-invasive profiling of cardiomyocytes and for future chip design and operation of high-throughput lab-on-a-chip devices.
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Affiliation(s)
- W Espulgar
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Miyashita A, Hatsuta H, Kikuchi M, Nakaya A, Saito Y, Tsukie T, Hara N, Ogishima S, Kitamura N, Akazawa K, Kakita A, Takahashi H, Murayama S, Ihara Y, Ikeuchi T, Kuwano R. Genes associated with the progression of neurofibrillary tangles in Alzheimer's disease. Transl Psychiatry 2014; 4:e396. [PMID: 26126179 PMCID: PMC4080317 DOI: 10.1038/tp.2014.35] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 03/27/2014] [Accepted: 04/22/2014] [Indexed: 12/21/2022] Open
Abstract
The spreading of neurofibrillary tangles (NFTs), intraneuronal aggregates of highly phosphorylated microtubule-associated protein tau, across the human brain is correlated with the cognitive severity of Alzheimer's disease (AD). To identify genes relevant to NFT expansion defined by the Braak stage, we conducted whole-genome exon array analysis with an exploratory sample set consisting of 213 human post-mortem brain tissue specimens from the entorinal, temporal and frontal cortices of 71 brain-donor subjects: Braak NFT stages 0 (N=13), I-II (N=20), III-IV (N=19) and V-VI (N=19). We identified eight genes, RELN, PTGS2, MYO5C, TRIL, DCHS2, GRB14, NPAS4 and PHYHD1, associated with the Braak stage. The expression levels of three genes, PHYHD1, MYO5C and GRB14, exhibited reproducible association on real-time quantitative PCR analysis. In another sample set, including control subjects (N=30), and in patients with late-onset AD (N=37), dementia with Lewy bodies (N=17) and Parkinson disease (N=36), the expression levels of two genes, PHYHD1 and MYO5C, were obviously associated with late-onset AD. Protein-protein interaction network analysis with a public database revealed that PHYHD1 interacts with MYO5C via POT1, and PHYHD1 directly interacts with amyloid beta-peptide 42. It is thus likely that functional failure of PHYHD1 and MYO5C could lead to AD development.
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Affiliation(s)
- A Miyashita
- Department of Molecular Genetics, Bioresource Science Branch, Center for Bioresources, Brain Research Institute, Niigata University, Niigata, Japan,Department of Molecular Genetics, Brain Research Institute, Niigata University, 1-757 Asahimachi, Niigata 951-8585, Japan. E-mails: or
| | - H Hatsuta
- Department of Neuropathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - M Kikuchi
- Research Association for Biotechnology, Tokyo, Japan
| | - A Nakaya
- Center for Transdisciplinary Research, Niigata University, Niigata, Japan
| | - Y Saito
- Department of Pathology, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
| | - T Tsukie
- Research Association for Biotechnology, Tokyo, Japan
| | - N Hara
- Department of Molecular Genetics, Bioresource Science Branch, Center for Bioresources, Brain Research Institute, Niigata University, Niigata, Japan
| | - S Ogishima
- Department of Health Record Informatics, Tohoku Medical Megabank Organization, Tohoku University, Miyagi, Japan
| | - N Kitamura
- Department of Medical Informatics, Niigata University, Niigata, Japan
| | - K Akazawa
- Department of Medical Informatics, Niigata University, Niigata, Japan
| | - A Kakita
- Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - H Takahashi
- Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - S Murayama
- Department of Neuropathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - Y Ihara
- Department of Neuropathology, Faculty of Life and Medical Sciences, Doshisha University, Kyoto, Japan
| | - T Ikeuchi
- Department of Molecular Genetics, Bioresource Science Branch, Center for Bioresources, Brain Research Institute, Niigata University, Niigata, Japan
| | - R Kuwano
- Department of Molecular Genetics, Bioresource Science Branch, Center for Bioresources, Brain Research Institute, Niigata University, Niigata, Japan,Department of Molecular Genetics, Brain Research Institute, Niigata University, 1-757 Asahimachi, Niigata 951-8585, Japan. E-mails: or
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Omoto M, Suzuki S, Ikeuchi T, Ishihara T, Kobayashi T, Tsuboi Y, Ogasawara J, Koga M, Kawai M, Iwaki T, Kanda T. Autosomal dominant tauopathy with parkinsonism and central hypoventilation. Neurology 2012; 78:762-4. [DOI: 10.1212/wnl.0b013e318248e531] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Kasuga K, Shimohata T, Nishimura A, Shiga A, Mizuguchi T, Tokunaga J, Ohno T, Miyashita A, Kuwano R, Matsumoto N, Onodera O, Nishizawa M, Ikeuchi T. Identification of independent APP locus duplication in Japanese patients with early-onset Alzheimer disease. J Neurol Neurosurg Psychiatry 2009; 80:1050-2. [PMID: 19684239 DOI: 10.1136/jnnp.2008.161703] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [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: 11/03/2022]
Abstract
BACKGROUND The occurrence of duplications of the amyloid precursor protein gene (APP) has been described in European families with early-onset familial Alzheimer disease (EO-FAD) and cerebral amyloid angiopathy. However, the contribution of APP duplication to the development of AD in other ethnic populations remains undetermined. METHODS The occurrence of APP duplication in probands from 25 families with FAD and 11 sporadic EO-AD cases in the Japanese population was examined by quantitative PCR and microarray-based comparative genomic hybridisation analyses. APP expression level was determined by real-time quantitative reverse-transcription (RT) PCR analysis using mRNA extracted from the peripheral blood of the patients. RESULTS We identified APP locus duplications in two unrelated EO-FAD families. The duplicated genomic regions in two patients of these families differed from each other. No APP duplication was found in the late-onset FAD families or sporadic EO-AD patients. The patients with APP duplication developed insidious memory disturbance in their fifties without intracerebral haemorrhage and epilepsy. Quantitative RT-PCR analysis showed the increased APP mRNA expression levels in these patients compared with those in age- and sex-matched controls. CONCLUSIONS Our results suggest that APP duplication should be considered in patients with EO-FAD in various ethnic groups, and that increased APP mRNA expression level owing to APP duplication contributes to AD development.
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Affiliation(s)
- K Kasuga
- Department of Molecular Neuroscience, Bioresource Science Branch, Center for Bioresources, Brain Research Institute, Niigata University, Niigata, Japan
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Izumi H, Matsumoto Y, Ikeuchi T, Saya H, Kajii T, Matsuura S. BubR1 localizes to centrosomes and suppresses centrosome amplification via regulating Plk1 activity in interphase cells. Oncogene 2009; 28:2806-20. [PMID: 19503101 DOI: 10.1038/onc.2009.141] [Citation(s) in RCA: 37] [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] [Received: 09/05/2008] [Revised: 04/17/2009] [Accepted: 04/28/2009] [Indexed: 12/28/2022]
Abstract
BubR1 is a critical component of the mitotic checkpoint that delays the onset of anaphase until all chromosomes have established bipolar attachment to the microtubules. We previously reported that mutations of the BUB1B gene (encoding BubR1) caused premature chromatid separation (PCS) syndrome, a condition characterized by constitutional aneuploidy and a high risk of childhood cancer. We here report that the cells from PCS syndrome patients have loss of regulation of the centrosome duplication machinery, resulting in centrosome amplification and multipolar mitosis. PCS syndrome cells show increased activity of Polo-like kinase 1 (Plk1), whose knockdown suppresses centrosome amplification. BubR1 localizes to centrosomes, physically interacts with Plk1 and inhibits Plk1 phosphorylation and its kinase activity during interphase. These results unravel a crucial role of BubR1 in preventing centrosome reduplication through negative regulation of Plk1 in interphase cells.
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Affiliation(s)
- H Izumi
- Department of Radiation Biology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
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Uchiyama T, Ikeuchi T, Ouchi Y, Sakamoto M, Kasuga K, Shiga A, Suzuki M, Ito M, Atsumi T, Shimizu T, Ohashi T. Prominent psychiatric symptoms and glucose hypometabolism in a family with a SNCA duplication. Neurology 2008; 71:1289-91. [PMID: 18852445 DOI: 10.1212/01.wnl.0000327607.28928.e6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- T Uchiyama
- Department of Neurology, Seirei Hamamatsu General Hospital, Japan
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Hara K, Shiga A, Nozaki H, Mitsui J, Takahashi Y, Ishiguro H, Yomono H, Kurisaki H, Goto J, Ikeuchi T, Tsuji S, Nishizawa M, Onodera O. Total deletion and a missense mutation of ITPR1 in Japanese SCA15 families. Neurology 2008; 71:547-51. [PMID: 18579805 DOI: 10.1212/01.wnl.0000311277.71046.a0] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Spinocerebellar ataxia type 15 (SCA15) is a progressive neurodegenerative disorder characterized by pure cerebellar ataxia, very slow progression, and distinct cerebellar atrophy. The locus for SCA15 was first mapped to 3p24.2-3pter in an Australian family. We have subsequently mapped two Japanese families presenting with ataxia and postural tremor of the head, arm, or trunk to the SCA15 locus. Recently, partial deletions involving both the type 1 inositol 1,4,5-triphosphate receptor (ITPR1) and sulfatase modifying factor 1 (SUMF1) genes have been identified in Australian and British families with SCA15. METHODS We conducted fine haplotype analysis on the region including ITPR1. To identify the deletion, we conducted gene dosage analysis and array-based comparative genomic hybridization (aCGH) analysis. Gene expression analysis was performed using quantitative real-time reverse transcription PCR. Mutational analyses of ITPR1 and SUMF1 were also performed. RESULTS We have identified a 414-kb deletion including the entire ITPR1 and exon 1 of SUMF1 in patients in family A. The expression levels of ITPR1 and SUMF1 mRNAs of the patient were half those of the normal control. Furthermore, in family B, we have identified a C-to-T substitution at position 8581 of ITPR1, resulting in the amino acid substitution of leucine for proline at codon 1059, which is highly conserved among species. CONCLUSIONS Our results strongly confirm that ITPR1 is the causative gene for SCA15 and suggest that we need to investigate the point mutation in ITPR1 in the patients with autosomal dominant cerebellar ataxia and tremor.
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Affiliation(s)
- K Hara
- Department of Molecular Neuroscience, Center for Bioresource-based Researches, Brain Research Institute, Niigata University, 1-757, Asahi-machi-dori, Niigata City 951-8585, Japan
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Maksimova NR, Nikolaeva IA, Korotkov MN, Ikeuchi T, Onodera O, Nishizava M, Stepanova SK, Kurtanov KA, Sukhomiasova AL, Nogovitsyna AN, Gurinova EE, Stepanov VA, Puzyrev VP. [The clinical-genealogic and molecular-genetic characteristics of oculopharyngeal muscular dystrophy in the Republic of Sakha (Yakutia)]. Zh Nevrol Psikhiatr Im S S Korsakova 2008; 108:52-60. [PMID: 18577936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The clinical-genealogic and molecular-genetic investigation of oculopharyngeal muscular dystrophy (OPMD) in the Republic of Sakha (Yakutia) was performed. It was investigated 33 unrelated Yakut families with 38 patients and 2 russian families with 2 patients and 59 their healthy relatives as well. The high clinical polymorphism of disease was found in patients with OPMD. The mutation in exon 1 of the PABPN1 gene resulting in the expansion of GCG-repeats up to 10 is revealed. Using direct sequencing of the PABPN1 gene in 17 families (16 Yakut, 1 Russian), we identified a type of this mutation as an insertion of 4 GCG-repeats. Frequency of OPMD in the Yakut population is 1:11 680 that is 10-20 times higher comparing to european populations. This is a first report on the patients with OPMD from the Republic of Sakha with diagnosis confirmed by molecular-genetic analysis.
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Maksimova N, Hara K, Miyashia A, Nikolaeva I, Shiga A, Nogovicina A, Sukhomyasova A, Argunov V, Shvedova A, Ikeuchi T, Nishizawa M, Kuwano R, Onodera O. Clinical, molecular and histopathological features of short stature syndrome with novel CUL7 mutation in Yakuts: new population isolate in Asia. J Med Genet 2007; 44:772-8. [PMID: 17675530 PMCID: PMC2652813 DOI: 10.1136/jmg.2007.051979] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [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: 11/04/2022]
Abstract
BACKGROUND In total, 43 patients having short stature syndrome in 37 Yakut families with autosomal recessive prenatal and postnatal nonprogressive growth failure and facial dysmorphism but with normal intelligence have been identified. METHODS Because Yakuts are considered as a population isolate and the disease is rare in other populations, genomewide homozygosity mapping was performed using 763 microsatellite markers and candidate gene approach in the critical region to identify the causative gene for the short stature syndrome in Yakut. RESULTS All families shared an identical haplotype in the same region as the identical loci responsible for 3-M and gloomy face syndromes and a novel homozygous 4582insT mutation in Cullin 7 (CUL7) was found, which resulted in a frameshift mutation and the formation of a subsequent premature stop codon at 1553 (Q1553X). Yakut patients with short stature syndrome have unique features such as a high frequency of neonatal respiratory distress and few bone abnormalities, whereas the clinical features of the other Yakut patients were similar to those of 3-M syndrome. Furthermore, abnormal vascularisation was present in the fetal placenta and an abnormal development of cartilage tissue in the bronchus of a fetus with CUL7 mutation. CONCLUSION These findings may provide a new understanding of the clinical diversity and pathogenesis of short stature syndrome with CUL7 mutation.
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Affiliation(s)
- N Maksimova
- Yakut Scientific Centre of Russian Academy of Medical Sciences and Government of Republic of Sakha (Yakutia), Yakutsk, Russia
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Kasuga K, Kaneko H, Nishizawa M, Onodera O, Ikeuchi T. Generation of intracellular domain of insulin receptor tyrosine kinase by gamma-secretase. Biochem Biophys Res Commun 2007; 360:90-6. [PMID: 17577576 DOI: 10.1016/j.bbrc.2007.06.022] [Citation(s) in RCA: 42] [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] [Received: 05/30/2007] [Accepted: 06/04/2007] [Indexed: 11/23/2022]
Abstract
The proteolytic cleavage of a precursor protein into alpha- and beta-subunits by furin is required to form functional insulin receptor (IR). In this study, we examined if IR undergoes the additional presenilin (PS)/gamma-secretase-dependent processing. In cells treated with gamma-secretase inhibitors or expressing the dominant-negative PS1 variant led to the accumulation of an endogenous IR C-terminal fragment. In the presence of proteasome inhibitors, we detected a PS/gamma-secretase cleavage product of the IR, termed the IR intracellular domain (ICD). Cellular fractionation and confocal microscopy analyses showed that the IR-ICD is predominantly detected in the nucleus. These data indicate that IR is a tyrosine kinase receptor, which undergoes PS/gamma-secretase-dependent processing. We also show that the autophosphorylation levels of the IR beta-subunit upon insulin stimulation were decreased by the inactivation of PS/gamma-secretase, raising the possibility that the PS/gamma-secretase proteolysis of IR may play a modulatory role in insulin signaling.
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Affiliation(s)
- K Kasuga
- Department of Molecular Neuroscience, Brain Research Institute, Niigata University, 1 Asahimachi, Niigata 951-8585, Japan
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Nagaoka Y, Maeda T, Kawai Y, Nakashima D, Oikawa T, Shimoke K, Ikeuchi T, Kuwajima H, Uesato S. Synthesis and cancer antiproliferative activity of new histone deacetylase inhibitors: hydrophilic hydroxamates and 2-aminobenzamide-containing derivatives. Eur J Med Chem 2006; 41:697-708. [PMID: 16584813 DOI: 10.1016/j.ejmech.2006.02.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Revised: 02/02/2006] [Accepted: 02/09/2006] [Indexed: 01/15/2023]
Abstract
New series histone deacetylase inhibitors comprising a hydroxamic acid or 2-aminobenzamide group as a zinc-chelating function were synthesized and evaluated for antiproliferative activities against a panel of human cancer cells. The 2-aminobenzamide series inhibitors generally had the potency in cell growth inhibitions comparable to that of MS-275. Among them, the compound having a (3,4-difluorobenzyl)(2-hydroxyethyl)amino group at one end and a 2-aminobenzamide group at the other of molecule showed the most promising profile as an anticancer drug candidate, since it had a comparatively low toxicity as did MS-275 against a normal fibroblast cell CCD-1059SK. Additionally, the derivative exhibited a high recovery in human plasma stability test.
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Affiliation(s)
- Y Nagaoka
- Department of Biotechnology, Faculty of Engineering, Kansai University, Suita, Osaka 564-8680, Japan
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Hedera P, Rainier S, Zhao XP, Schalling M, Lindblad K, Yuan QP, Ikeuchi T, Trobe J, Wald JJ, Eldevik OP, Kluin K, Fink JK. Spastic paraplegia, ataxia, mental retardation (SPAR): a novel genetic disorder. Neurology 2002; 58:411-6. [PMID: 11839840 DOI: 10.1212/wnl.58.3.411] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To describe a kindred with a dominantly inherited neurologic disorder manifested either as uncomplicated spastic paraplegia or ataxia, spastic paraplegia, and mental retardation. METHODS Neurologic examinations and molecular genetic analysis (exclusion of known SCA and HSP genes and loci; and trinucleotide repeat expansion detection [RED]) were performed in six affected and four unaffected subjects in this family. MRI, electromyography (EMG), and nerve conduction studies were performed in three affected subjects. RESULTS The phenotype of this dominantly inherited syndrome varied in succeeding generations. Pure spastic paraplegia was present in the earliest generation; subsequent generations had ataxia and mental retardation. MRI showed marked atrophy of the spinal cord in all patients and cerebellar atrophy in those with ataxia. Laboratory analysis showed that the disorder was not caused by mutations in genes that cause SCA-1, SCA-2, SCA-3, SCA-6, SCA-7, SCA-8, and SCA-12; not linked to other known loci for autosomal dominant ataxia (SCA-4, SCA-5, SCA-10, SCA-11, SCA-13, SCA-14, and SCA-16); and not linked to known loci for autosomal dominant hereditary spastic paraplegia (HSP) (SPG-3, SPG-4, SPG-6, SPG-8, SPG-9, SPG-10, SPG-12, and SPG-13) or autosomal recessive HSP SPG-7. Analysis of intergenerational differences in age at onset of symptoms suggests genetic anticipation. Using RED, the authors did not detect expanded CAG, CCT, TGG, or CGT repeats that segregate with the disease. CONCLUSIONS The authors describe an unusual, dominantly inherited neurologic disorder in which the phenotype (pure spastic paraplegia or spastic ataxia with variable mental retardation) differed in subsequent generations. The molecular explanation for apparent genetic anticipation does not appear to involve trinucleotide repeat expansion.
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Affiliation(s)
- P Hedera
- Department of Neurology, University of Michigan, 1500 E. Medical Center Drive, Ann Arbor, MI 48109, USA
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Yu C, Kim SH, Ikeuchi T, Xu H, Gasparini L, Wang R, Sisodia SS. Characterization of a presenilin-mediated amyloid precursor protein carboxyl-terminal fragment gamma. Evidence for distinct mechanisms involved in gamma -secretase processing of the APP and Notch1 transmembrane domains. J Biol Chem 2001; 276:43756-60. [PMID: 11583985 DOI: 10.1074/jbc.c100410200] [Citation(s) in RCA: 165] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A variety of investigations have led to the conclusion that presenilins (PS) play a critical role in intramembranous, gamma-secretase proteolysis of selected type I membrane proteins, including Notch1 and amyloid precursor protein (APP). We now show that the generation of the S3/Notch intracellular domain and APP-carboxyl-terminal fragment gamma (CTFgamma) derivatives are dependent on PS expression and inhibited by a highly selective and potent gamma-secretase inhibitor. Unexpectedly, the APP-CTFgamma derivative is generated by processing between Leu-645 and Val-646 (of APP(695)), several amino acids carboxyl-terminal to the scissile bonds for production of amyloid beta protein peptides. Although the relationship of APP-CTFgamma to the production of amyloid beta protein peptides is not known, we conclude that in contrast to the highly selective PS-dependent processing of Notch, the PS-dependent gamma-secretase processing of APP is largely nonselective and occurs at multiple sites within the APP transmembrane domain.
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Affiliation(s)
- C Yu
- Department of Neurobiology, Pharmacology and Physiology, The University of Chicago, Chicago, Illinois 60637, USA
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Kajii T, Ikeuchi T, Yang ZQ, Nakamura Y, Tsuji Y, Yokomori K, Kawamura M, Fukuda S, Horita S, Asamoto A. Cancer-prone syndrome of mosaic variegated aneuploidy and total premature chromatid separation: report of five infants. Am J Med Genet 2001; 104:57-64. [PMID: 11746029 DOI: 10.1002/ajmg.1580] [Citation(s) in RCA: 64] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Five infants (two girls and three boys) from four families all had severe pre- and postnatal growth retardation, profound developmental delay, microcephaly, hypoplasia of the brain with Dandy-Walker complex or other posterior fossa malformations, and developed uncontrollable clonic seizures. Four infants developed Wilms tumors, and one showed cystic lesions in bilateral kidneys. All five infants showed variegated mosaic aneuploidy in cultured lymphocytes. In two infants whose chromosomes were prepared by us, 48.5%-83.2% lymphocytes showed total premature chromatid separation (PCS). Their parents had 3.5%-41.7% of their lymphocytes in total PCS. The remaining three infants and their parents, whose chromosomes were prepared at outside laboratories, tended to show lower frequencies of total PCS. Another five infants reported with the disorder were reviewed together with the five infants we described. Together, their clinical and cytogenetic manifestations were similar enough to suggest a syndrome. Seven of the 10 infants developed proven or probable Wilms tumors. The age at diagnosis of the tumors was younger than usual at 2-16 months. The tumors were bilateral in four infants and unilateral in three infants, and cystic changes were present in six infants. Two infants developed botryoid rhabdomyosarcoma. The carriers of the syndrome are thus liable to tumorigenesis. The possible role of mitotic checkpoint defects, proven in two infants with the syndrome (Matsuura et al. [2000: Am J Hum Genet 69:483-486]), was discussed in connection with tumor development and progression.
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Affiliation(s)
- T Kajii
- Kuboyama-cho 1-9-3-311, Hachioji, Tokyo 192-0023, Japan.
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Ohata H, Tanaka KI, Maeyama N, Ikeuchi T, Kamada A, Yamamoto M, Momose K. Physiological and pharmacological role of lysophosphatidic acid as modulator in mechanotransduction. Jpn J Pharmacol 2001; 87:171-6. [PMID: 11885964 DOI: 10.1254/jjp.87.171] [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] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The mechanotransduction mechanism is believed to play an important role in maintenance of cellular homeostasis in a wide variety of cell types. In particular, the mechanotransduction system in vascular endothelial cells may be an essential mechanism for local hemodynamic control. Elevations in intracellular free Ca2+ concentration ([Ca2]i) are an important signal in the initial step of mechanotransduction and mechanosensitive (MS) cation channels are thought to be a putative pathway; however, the molecular mechanisms remain unclear. We found that lysophosphatidic acid (LPA), a bioactive phospholipid, sensitizes the response of [Ca2+]i to mechanical stress in several cell types. Employing real-time confocal microscopy, local increases in [Ca2+]i in several regions within the cell during application of mechanical stress were clearly visualized in bovine lens epithelial and endothelial cells in the presence of LPA. The phenomenon was termed "Ca2+ spots". Pharmacological studies revealed that Ca2+ spots arise due to influx through MS channels. In this report, our data indicating the possible significance of LPA as an endogenous factor involved in regulation of mechanotransduction is reviewed. Furthermore, our findings suggest that the Ca2+ spot is a novel phenomenon occurring as an elementary Ca2+-influx event through MS channels directly coupled with the initial step in mechanotransduction.
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Affiliation(s)
- H Ohata
- Department of Pharmacology, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan.
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Abstract
We have investigated mechanisms of nicotine-induced phosphorylation of extracellular signal-regulated protein kinase (p42/44 MAP kinase, ERK) and cAMP response element binding protein (CREB) in PC12h cells. Nicotine transiently induced ERK phosphorylation at more than 1 microM. The maximal level of nicotine-induced ERK phosphorylation was lower than that of the membrane depolarization induced and, to a great extent, the nerve growth factor (NGF)-induced ERK phosphorylation. Nicotinic acetylcholine receptor (nAChR) alpha7 subunit-selective inhibitors had no significant effect on nicotine-induced ERK phosphorylation. L-Type voltage-sensitive calcium channel antagonists inhibited nicotine-induced ERK phosphorylation. Calcium imaging experiments showed that alpha7-containing nAChR subtypes were functional at 1 microM of nicotine in the nicotine-induced calcium influx, and non-alpha7 nAChRs were prominent in the Ca(2+) influx at 50 microM of nicotine. An expression of dominant inhibitory Ras inhibited nicotine-induced ERK phosphorylation. A calmodulin antagonist, a CaM kinase inhibitor, a MAP kinase kinase inhibitor inhibited nicotine-induced ERK and CREB phosphorylation. The time course of the phosphorylation of CREB induced by nicotine was similar to that of ERK induced by nicotine. These results suggest that non-alpha7 nAChRs are involved in nicotine-induced ERK phosphorylation through CaM kinase and the Ras-MAP kinase cascade and most of the nicotine-induced CREB phosphorylation is mediated by the ERK phosphorylation in PC12h cells.
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Affiliation(s)
- H Nakayama
- Department of Pharmacology, Nara Medical University, Kashihara, Nara, Japan.
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Abstract
An unenveloped single-stranded virus, which might be a causative agent for posttransfusion non-A-G hepatitis, was recently found and named "TT virus" (TTV). There is still controversy over the role of TTV in chronic hepatitis. Therefore, we have examined the prevalence of TTV in various types of chronic hepatitis in Japan. TTV DNA was detected in 11 of 40 patients (27.5%) with non-B, non-C chronic hepatitis, 13 of 46 patients (28.3%) with type B chronic hepatitis, 21 of 55 patients (38.2%) with type C chronic hepatitis, and 41 of 131 subjects (31.3%) with normal liver function tests. The positivity rate for TTV DNA tended to increase with age. The detection rate did not differ statistically between non-B, non-C chronic hepatitis and type B or type C chronic hepatitis, or normal subjects. The distribution of TTV genotypes was not significantly different among them. Clinical characteristics of the chronic illness were similar for patients with or without TTV in all hepatitis groups. The etiologic role of TTV in chronic hepatitis is not confirmed from the statistical and clinical standpoint.
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Affiliation(s)
- T Ikeuchi
- First Department of Internal Medicine, Chiba University School of Medicine, Chiba, Japan
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44
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Ikeuchi T, Sasaki S, Yamamoto H, Tatsura H, Kamiya H, Umemoto Y, Kubota H, Kubota Y, Yanai Y, Kohri K. [Effects for libido of male mice by change of gravity in parabolic flight]. Biol Sci Space 2001; 15:298-9. [PMID: 11997651] [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: 02/24/2023]
Affiliation(s)
- T Ikeuchi
- Department of Urology, Nagoya City University Medical School, Nagoya, Japan
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45
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Adachi N, Arima K, Asada T, Kato M, Minami N, Onuma T, Ikeuchi T, Tsuji S, Hayashi M, Fukutani Y. Dentatorubral-pallidoluysian atrophy (DRPLA) presenting with psychosis. J Neuropsychiatry Clin Neurosci 2001; 13:258-60. [PMID: 11449034 DOI: 10.1176/jnp.13.2.258] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/30/2022]
Abstract
The authors report on four DRPLA patients who manifested delusions. All patients demonstrated autosomal dominant DRPLA confirmed by standard gene analysis. Patients with DRPLA can exhibit a variety of psychiatric symptoms in addition to extrapyramidal and cerebellar symptoms.
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Affiliation(s)
- N Adachi
- National Center of Neurology and Psychiatry, Kodaira, Japan.
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46
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Yamada M, Tanabe K, Wada K, Shimoke K, Ishikawa Y, Ikeuchi T, Koizumi S, Hatanaka H. Differences in survival-promoting effects and intracellular signaling properties of BDNF and IGF-1 in cultured cerebral cortical neurons. J Neurochem 2001; 78:940-51. [PMID: 11553668 DOI: 10.1046/j.1471-4159.2001.00497.x] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.7] [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
Brain-derived neurotrophic factor (BDNF) and insulin-like growth factor-1 (IGF-1) act on various neurons of the CNS as neurotrophic factors promoting neuronal differentiation and survival. We examined the survival-promoting effects of BDNF and IGF-1 on serum deprivation-induced death in cultured cerebral cortical neurons, and compared the intracellular signaling pathways stimulated by BDNF and IGF-1 in the neurons. We found that the survival-promoting effect of BDNF was much weaker than that of IGF-1 in serum deprivation-induced death of cultured cortical neurons. We found no differences in the levels of phosphatidylinositol 3-kinase (PtdIns3-K) activity or Akt (also called PKB) phosphorylation induced by BDNF and IGF-1 in the cultured cortical neurons, although many reports suggest that PtdIns3-K and Akt are involved in survival promotion. In addition, phosphorylation signals of mitogen-activated protein kinase (MAPK) and cAMP responsive element-binding protein (CREB), which have also been reported to be involved in survival promotion, were stimulated by BDNF much more potently than by IGF-1. These results show that there may be, as yet unidentified, intracellular signaling pathways other than the PtdIns3-K-Akt, MAPK and CREB signaling, to regulate survival promotion. These unidentified signaling pathways may be responsible for the distinct strengths of the survival-promoting effects of BDNF and IGF-1.
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Affiliation(s)
- M Yamada
- Institute for Protein Research, Osaka University, Osaka, Japan.
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47
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Ozawa T, Okuizumi K, Ikeuchi T, Wakabayashi K, Takahashi H, Tsuji S. Analysis of the expression level of alpha-synuclein mRNA using postmortem brain samples from pathologically confirmed cases of multiple system atrophy. Acta Neuropathol 2001; 102:188-90. [PMID: 11563635 DOI: 10.1007/s004010100367] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [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: 11/28/2022]
Abstract
To determine whether multiple system atrophy (MSA) is associated with altered expression levels of the alpha-synuclein messenger RNA (mRNA), we performed quantitative reverse transcription polymerase chain reaction for alpha-synuclein mRNA using postmortem brain samples from 11 cases of MSA and 14 age-matched control subjects. The brain specimens used in this study contained both the gray matter and white matter, which were dissected from the frontal, temporal or occipital lobe. The expression levels of alpha-synuclein mRNA in the brain specimens of MSA cases were not different from those of the control subjects. These results suggest that the transcriptional regulation of the alpha-synuclein gene is unlikely to be affected in MSA brains.
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Affiliation(s)
- T Ozawa
- Department of Neurology, Brain Research Institute, Niigata University, Japan
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48
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Yamada M, Suzuki K, Mizutani M, Asada A, Matozaki T, Ikeuchi T, Koizumi S, Hatanaka H. Analysis of tyrosine phosphorylation-dependent protein-protein interactions in TrkB-mediated intracellular signaling using modified yeast two-hybrid system. J Biochem 2001; 130:157-65. [PMID: 11432792 DOI: 10.1093/oxfordjournals.jbchem.a002955] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Activated receptor tyrosine kinases induce a large number of tyrosine phosphorylation-dependent protein-protein interactions through which they mediate their various ligand-exerted functions including regulation of proliferation, differentiation and survival. TrkB receptor tyrosine kinase activated by binding of brain-derived neurotrophic factor (BDNF) also stimulates various protein interactions in a tyrosine phosphorylation-dependent manner in neuronal cells. To examine tyrosine phosphorylation-dependent interactions stimulated by active TrkB, we developed a modified yeast two-hybrid system, which we call the yeast two-and-a-half-hybrid system. In this system, yeast was engineered to express a tyrosine kinase domain of TrkB as an effector, in addition to two fusion proteins with GAL4 DNA-binding and GAL4 activation domains as bait and prey proteins, respectively. Using this system with Shp2 as the bait, we demonstrated that Shp2 interacts directly with BIT/SHPS-1 (also called SIRP) and Grb2 depending on tyrosine phosphorylation mediated by TrkB. Furthermore, we screened an adult human brain cDNA library with the yeast two-and-a-half-hybrid system in order to identify other Shp2-binding proteins in TrkB-stimulated tyrosine phosphorylation signaling. We found that fibroblast growth factor receptor substrate 2beta (FRS2beta), also called SNT2, interacts with Shp2 dependently on TrkB-mediated tyrosine phosphorylation of FRS2beta/SNT2. Therefore, we show that the two-and-a-half-hybrid system is a powerful tool for studying tyrosine phosphorylation-dependent protein-protein interactions in intracellular signaling pathways stimulated by TrkB receptor tyrosine kinase.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Adult
- Antigens, Differentiation
- Brain/metabolism
- Carrier Proteins/genetics
- Carrier Proteins/metabolism
- Cell Line
- Electrophoresis, Polyacrylamide Gel
- GRB2 Adaptor Protein
- Humans
- Intracellular Signaling Peptides and Proteins
- Lipoproteins/genetics
- Lipoproteins/metabolism
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Neural Cell Adhesion Molecule L1
- Neural Cell Adhesion Molecules/genetics
- Neural Cell Adhesion Molecules/metabolism
- Phosphoproteins/genetics
- Phosphoproteins/metabolism
- Phosphorylation
- Phosphotyrosine/metabolism
- Protein Binding
- Protein Structure, Tertiary
- Protein Tyrosine Phosphatase, Non-Receptor Type 11
- Protein Tyrosine Phosphatase, Non-Receptor Type 6
- Protein Tyrosine Phosphatases/genetics
- Protein Tyrosine Phosphatases/metabolism
- Proteins/genetics
- Proteins/metabolism
- Receptor, trkB/chemistry
- Receptor, trkB/genetics
- Receptor, trkB/metabolism
- Receptors, Immunologic
- Signal Transduction
- Two-Hybrid System Techniques
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Affiliation(s)
- M Yamada
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Ohata H, Ikeuchi T, Kamada A, Yamamoto M, Momose K. Lysophosphatidic acid positively regulates the fluid flow-induced local Ca(2+) influx in bovine aortic endothelial cells. Circ Res 2001; 88:925-32. [PMID: 11349002 DOI: 10.1161/hh0901.090300] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Using real-time confocal microscopy, we have demonstrated that lysophosphatidic acid (LPA), a bioactive phospholipid existing in plasma, positively regulates fluid flow-induced [Ca(2+)](i) response in fluo 4-loaded, cultured, bovine aortic endothelial cells. The initial increase in [Ca(2+)](i) was localized to a circular area with a diameter of <4 microm and spread concentrically, resulting in a mean global increase in [Ca(2+)](i). The local increase often occurred in a stepwise manner or repetitively during constant flow. The percentage of cells that responded and the averaged level of increase in [Ca(2+)](i) were dependent on both the concentration of LPA (0.1 to 10 micromol/L) and the flow rate (25 to 250 mm/s). The response was inhibited by removing extracellular Ca(2+) or by the application of Gd(3+), an inhibitor of mechanosensitive (MS) channels, but not by thapsigargin, an inhibitor of the endoplasmic reticular Ca(2+)-ATPASE: It was also inhibited by 8-bromo-cGMP, and the inhibition was completely reversed by KT5823, an inhibitor of protein kinase G (PKG). These results suggest that the [Ca(2+)](i) response arises from Ca(2+) influx through Gd(3+)-sensitive MS channels, which are negatively regulated by the activation of PKG. The spatiotemporal properties of the [Ca(2+)](i) response were completely different from those of a Ca(2+) wave induced by ATP, a Ca(2+)-mobilizing agonist. Therefore, we called the phenomenon Ca(2+) spots. We conclude that LPA positively regulates fluid flow-induced local and oscillatory [Ca(2+)](i) increase, ie, the Ca(2+) spots, in endothelial cells via the activation of elementary Ca(2+) influx through PKG-regulating MS channels. This indicates an important role for LPA as an endogenous factor in fluid flow-induced endothelial function.
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Affiliation(s)
- H Ohata
- Department of Pharmacology, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan.
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50
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Abstract
Two subtypes (alpha and beta) of androgen (AR) and progestogen receptors (PR) are present in the testis of Japanese eel (Anguilla japonica). Amino acid homology of the open reading frames between alpha and beta in AR or PR is approximately 40%, but the DNA- and ligand-binding domains show high homology between subtypes. Judging from these structures, alpha and beta are not isoforms derived from translational initiation at two in-phase ATG codons, alternative splicing, or tetraploidy. In transient transfection assays using a reporter construct containing a steroid-responsive promoter, each subtype showed its corresponding hormone-dependent transactivation. The ligand affinity for transactivation between AR and PR subtypes was similar for physiological ligands. Tissue distribution of both subtype mRNAs was different. Protein interaction between subtypes was demonstrated in vitro by GST pull-down assays. These results clearly indicate that two functional subtypes of AR and PR exist in eel. These findings will advance our understanding of the mechanisms underlying sex steroid signaling.
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Affiliation(s)
- T Ikeuchi
- Laboratory of Reproductive Biology, National Institute for Basic Biology, 444-8585, Okazaki, Japan
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