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Yokouchi H, Mizugaki H, Ikezawa Y, Morita R, Tateishi K, Yokoo K, Sumi T, Kikuchi H, Nakamura A, M. kobayashi, Aso M, Tsukita Y, Yoshiike F, Furuta M, Tanaka H, Sekikawa M, Hachiya T, Nakamura K, Kitamura Y. 335P Real-world data of first-line treatment with pembrolizumab for non-small cell lung cancer with high PD-L1 expression (HOT/NJLCG2001). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.373] [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: 12/05/2022] Open
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Kitamura Y, Okumura Y, Shirakawa Y, Ikeda Y, Kita Y. Characteristics of shifting ability in children with mild intellectual disabilities: an experimental study with a task-switching paradigm. J Intellect Disabil Res 2022; 66:853-864. [PMID: 36065757 DOI: 10.1111/jir.12974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 07/11/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Shifting enables flexible switch between tasks or mental sets. It is a component of the executive function that plays critical roles in human behaviour control. However, shifting ability in individuals with intellectual disability (ID) has not been well clarified because of the use of intellectually demanding tasks in previous studies. The present study invented a novel shifting task with minimal intellectual demands and aimed to clarify the characteristics of shifting in adolescents with ID. METHODS Adolescents with ID (n = 21) and chronological-age-matched (n = 10) and mental-age-matched controls (n = 33) performed a novel shifting task with simple rule switching (i.e. change in direction). Analyses focused on the switch cost or the increase in the reaction time associated with rule switching. RESULTS Two subtypes of adolescents with ID were found with respect to the switch cost: one that lacks it and another with an increased switch cost. The lack of a switch cost was unique to the subgroup adolescents with ID and was not indicated in the control group. CONCLUSIONS The present study indicated that shifting in adolescents with ID does not depend solely on their intellectual function and is highly heterogeneous. This finding further implies that executive functions, including shifting, must be evaluated separately from their intellectual functions.
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Affiliation(s)
- Y Kitamura
- Department of Design, Graduate School of Design, Kyushu University, Fukuoka, Japan
- School for Children with Intellectual Disabilities, Tokyo Gakugei University, Tokyo, Japan
| | - Y Okumura
- Mori Arinori Institute for Higher Education and Global Mobility, Hitotsubashi University, Tokyo, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Y Shirakawa
- Mori Arinori Institute for Higher Education and Global Mobility, Hitotsubashi University, Tokyo, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Y Ikeda
- Department of Special Needs Education, Joetsu University of Education, Niigata, Japan
| | - Y Kita
- Mori Arinori Institute for Higher Education and Global Mobility, Hitotsubashi University, Tokyo, Japan
- Department of Psychology, Faculty of Letters, Keio University, Tokyo, Japan
- Cognitive Brain Research Unit (CBRU), Faculty of Medicine, University of Helsinki, Helsinki, Finland
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Tabata K, Nishie A, Shimomura Y, Isoda T, Kitamura Y, Nakata K, Yamada Y, Oda Y, Ishigami K, Baba S. Prediction of pathological response to preoperative chemotherapy for pancreatic ductal adenocarcinoma using 2-[ 18F]-fluoro-2-deoxy-d-glucose positron-emission tomography. Clin Radiol 2022; 77:436-442. [PMID: 35410786 DOI: 10.1016/j.crad.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 03/02/2022] [Indexed: 12/24/2022]
Abstract
AIM To determine whether the pathological response to preoperative chemotherapy for pancreatic ductal adenocarcinoma (PDAC) can be predicted using 2-[18F]-fluoro-2-deoxy-d-glucose positron-emission tomography (F-18 FDG-PET). MATERIALS AND METHODS Twenty-eight patients with PDAC who underwent only neoadjuvant chemotherapy (NAC) before surgery were enrolled in the study. All patients had F-18 FDG-PET examinations before NAC. The resected specimen was pathologically evaluated according to the Classification of Pancreatic Carcinoma (7th edn). Patients were categorised into a non-response group and a response group based on the pathological findings. The non-response group (Grades 1a and 1b) showed ≤50% necrosis in the specimen, while the specimens of the response group (Grades 2-3) showed >50% necrosis. The maximum standardised uptake values (SUVmax) of the tumours on F-18 FDG-PET were measured. The mean values of SUVmax were compared between the two groups. The diagnostic performance of SUVmax in distinguishing the two groups was also evaluated using receiver operating characteristic analysis. RESULTS The mean SUVmax of the response group was higher than that of the non-response group (9.00 ± 1.78 versus 4.26 ± 2.35; p<0.001). The optimal cut-off value of SUVmax was 9.28 for distinguishing the two groups. The sensitivity, specificity, and accuracy for the prediction in the response group were 80%, 95.7%, and 92.9%, respectively. CONCLUSIONS SUVmax on F-18 FDG-PET may be useful as a biomarker to predict the pathological response to NAC in patients with PDAC.
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Affiliation(s)
- K Tabata
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - A Nishie
- Department of Radiology Informatics and Network, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan; Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, 207, Uehara, Nishihara-cho, Okinawa, 903-0215, Japan.
| | - Y Shimomura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - T Isoda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - Y Kitamura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - K Nakata
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - Y Yamada
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - Y Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - K Ishigami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
| | - S Baba
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku Fukuoka, 812-8582, Japan
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Komeda M, Toh Y, Tanabe K, Kitamura Y, Misawa T. First demonstration experiment of the neutron rotation method for detecting nuclear material. ANN NUCL ENERGY 2021. [DOI: 10.1016/j.anucene.2021.108300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Nakamura A, Mizugaki H, Ikezawa Y, Morita R, Tateishi K, Yokoo K, Sumi T, Kikuchi H, Kitamura Y, Morita M, Aso M, Tsukita Y, Yoshiike F, Furuta M, Tanaka H, Sekikawa M, Hachiya T, Nakamura K, Yokouchi H. 1306P Real-world data of first-line treatment with pembrolizumab for highly PD-L1 expressing NSCLC (HOT/NJLCG2001). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1908] [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] Open
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Ozawa Y, Harutani Y, Oyanagi J, Murakami E, Sato K, Akamatsu H, Hayata A, Teraoka S, Ueda H, Kitamura Y, Fukuoka J, Tokudome N, Nakanishi M, Koh Y, Yamamoto N. P60.08 Impact of CD24 and CD47 Tumor Expression on Efficacy and Serum Cytokine Alteration with PD-1/L1 Inhibitors in Non-Small Cell Lung cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Ogawa H, Sakai Y, Nishio W, Fujibayashi Y, Nishikubo M, Nishioka Y, Tane S, Kitamura Y, Sudo T, Sakuma Y, Yoshimura M. P1.12-23 DLL3 Is a Predictive Marker of Sensitivity to Adjuvant Chemotherapy for High-Grade Neuroendocrine Tumors. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1136] [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: 10/25/2022]
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Okuma H, Tane S, Nishioka Y, Ogawa H, Kitamura Y, Nishio W, Yoshimura M. P2.17-15 Clinical Features and Prognosis of Lung Cancer with Cavity Lesion. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1926] [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: 11/28/2022]
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9
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Sugawara Y, Tsuji I, Mizoue T, Inoue M, Sawada N, Matsuo K, Ito H, Naito M, Nagata C, Kitamura Y, Sadakane A, Tanaka K, Tamakoshi A, Tsugane S, Shimazu T. Cigarette smoking and cervical cancer risk: an evaluation based on a systematic review and meta-analysis among Japanese women. Jpn J Clin Oncol 2019; 49:77-86. [PMID: 30407555 DOI: 10.1093/jjco/hyy158] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 10/30/2018] [Indexed: 11/13/2022] Open
Abstract
Background There is a body of evidence to suggest that cigarette smoking increases the risk of cervical cancer in women, but no study has examined the magnitude of the association in Japanese women. Here, we evaluated the association between cigarette smoking and the risk of cervical cancer in Japanese women based on a systematic review of epidemiological evidence. Methods Original data were obtained from a MEDLINE search using PubMed or from a search of the 'Ichushi' database, as well as by a manual search. Evaluation of associations was based on the strength of evidence and the magnitude of association, together with biological plausibility as evaluated previously by the International Agency for Research on Cancer. Meta-analysis of associations was also conducted to obtain a summarized overview of the data. Results We identified two cohort studies and three case-control studies. All five studies had indicated strong positive associations between cigarette smoking and the risk of cervical cancer. Our summary estimate indicated that the relative risk (RR) for individuals who had ever-smoked relative to never-smokers was 2.03 (95% confidence interval: 1.49-2.57). Four studies had also demonstrated dose-response relationships between cigarette smoking and the risk of cervical cancer. Conclusion We conclude that there is convincing evidence that cigarette smoking increases the risk of cervical cancer among Japanese women.
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Affiliation(s)
- Y Sugawara
- Department of Health Informatics and Public Health, Division of Epidemiology, Graduate School of Medicine, Tohoku University School of Public Health, Sendai, Japan
| | - I Tsuji
- Department of Health Informatics and Public Health, Division of Epidemiology, Graduate School of Medicine, Tohoku University School of Public Health, Sendai, Japan
| | - T Mizoue
- Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan
| | - M Inoue
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - N Sawada
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - K Matsuo
- Division of Molecular Medicine, Aichi Cancer Center Research Institute, Nagoya, Japan.,Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - H Ito
- Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
| | - M Naito
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - C Nagata
- Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Y Kitamura
- Department of Social and Environmental Medicine, Division of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Suita, Japan
| | - A Sadakane
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - K Tanaka
- Department of Preventive Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - A Tamakoshi
- Department of Public Health, Hokkaido University Faculty of Medicine, Sapporo, Japan
| | - S Tsugane
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - T Shimazu
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
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Zamami Y, Kouno Y, Niimura T, Chuma M, Imai T, Mitsui M, Koyama T, Kayano M, Okada N, Hamano H, Goda M, Imanishi M, Takechi K, Horinouchi Y, Kondo Y, Yanagawa H, Kitamura Y, Sendo T, Ujike Y, Ishizawa K. Relationship between the administration of nicardipine hydrochloride and the development of delirium in patients on mechanical ventilation. Pharmazie 2018; 73:740-743. [PMID: 30522561 DOI: 10.1691/ph.2018.8711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A history of hypertension is a known risk factor for delirium in patients in intensive care units, but the effect of antihypertensive agents on delirium development is unclear. Nicardipine, a calcium channel blocker, is widely used in ICU as a treatment agent for hypertensive emergency. This study investigated the relationship between the administration of nicardipine hydrochloride and delirium development in patients under mechanical ventilation. We conducted a medical chart review of 103 patients, who were divided into two groups according to the use of nicardipine hydrochloride. The prevalence of delirium was compared with respect to factors such as age, sex, laboratory data, and medical history, by multivariate analysis. 21 patients (20.4 %) were treated with nicardipine hydrochloride in 103 patients. The treatment and non-treatment groups differed significantly in age (72 vs. 65 years) and history of high blood pressure (57% vs. 11%). Multivariate analysis revealed that patients in the treatment group developed delirium significantly less often than those in the non-treatment group (19% vs. 48%). These results suggested that treatment of high blood pressure with nicardipine hydrochloride is a possible method for preventing the development of delirium.
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11
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Ogawa H, Tanaka Y, Kitamura Y, Tanaka H, Nishioka Y, Tane S, Nishio W, Maniwa Y, Yoshimura M. P1.12-05 Efficacy of Perioperative Chemotherapy for High-Grade Neuroendocrine Tumors. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.840] [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: 11/17/2022]
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12
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Kita Y, Suzuki K, Shirakawa Y, Kaga Y, Okumura Y, Kitamura Y, Arakaki K, Mitsuhashi S, Inagaki M, Okuzumi H. An ERP study of inhibitory control in adults with developmental coordination disorder. Int J Psychophysiol 2018. [DOI: 10.1016/j.ijpsycho.2018.07.408] [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: 10/28/2022]
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13
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Sasazuki S, Inoue M, Shimazu T, Wakai K, Naito M, Nagata C, Tanaka K, Tsuji I, Sugawara Y, Mizoue T, Matsuo K, Ito H, Tamakoshi A, Sawada N, Nakayama T, Kitamura Y, Sadakane A, Tsugane S. Evidence-based cancer prevention recommendations for Japanese. Jpn J Clin Oncol 2018; 48:576-586. [PMID: 29659926 DOI: 10.1093/jjco/hyy048] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 03/23/2018] [Indexed: 12/19/2022] Open
Abstract
A comprehensive evidence-based cancer prevention recommendation for Japanese was developed. We evaluated the magnitude of the associations of lifestyle factors and infection with cancer through a systematic review of the literature, meta-analysis of published data, and pooled analysis of cohort studies in Japan. Then, we judged the strength of evidence based on the consistency of the associations between exposure and cancer and biological plausibility. Important factors were extracted and summarized as an evidence-based, current cancer prevention recommendation: 'Cancer Prevention Recommendation for Japanese'. The recommendation addresses six important domains related to exposure and cancer, including smoking, alcohol drinking, diet, physical activity, body weight and infection. The next step should focus on the development of effective behavior modification programs and their implementation and dissemination.
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Affiliation(s)
- S Sasazuki
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo
| | - M Inoue
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo
| | - T Shimazu
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo
| | - K Wakai
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya
| | - M Naito
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya
| | - C Nagata
- Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu
| | - K Tanaka
- Department of Preventive Medicine, Faculty of Medicine, Saga University, Saga
| | - I Tsuji
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai
| | - Y Sugawara
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai
| | - T Mizoue
- Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo
| | - K Matsuo
- Division of Molecular Medicine, Aichi Cancer Center Research Institute.,Department of Epidemiology, Nagoya University Graduate School of Medicine
| | - H Ito
- Department of Epidemiology, Nagoya University Graduate School of Medicine.,Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya
| | - A Tamakoshi
- Department of Public Health, Hokkaido University Faculty of Medicine, Sapporo
| | - N Sawada
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo
| | - T Nakayama
- Cancer Control Center, Osaka International Cancer Institute, Osaka
| | - Y Kitamura
- Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, Suita
| | - A Sadakane
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - S Tsugane
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo
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Suyatno, Kitamura Y, Minami N, Yamada M, Imai H. 192 Culture Conditions Supporting Long-Term Expansion of Bovine Spermatogonial Stem Cells Isolated from Adult and Immature Testes. Reprod Fertil Dev 2018. [DOI: 10.1071/rdv30n1ab192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Spermatogonial stem cells (SSC) self-renew and differentiate into spermatocytes to produce haploid sperm. Because SSC are a small population of adult stem cells in the testis, numerous studies have been reported to derive cell lines from cultured SSC. It has been reported that neonatal and adult mouse SSC can be cultured in vitro over the long term. Male germline stem (GS) cells, embryonic stem (ES)-like cells, and multipotent male germline stem (MGS) cells were derivated from mouse SSC. However, in domestic species including cattle, information about in vitro culture of SSC is mainly available in the neonatal and immature animal. To our knowledge, there are no reports about long-term culture of SSC isolated from adult bovine testis. In this report, we established culture conditions to maintain SSC isolated from adult and immature testes. The SSC were isolated by 3-step enzymatic digestion and enriched by Percoll gradient centrifugation. For adult testicular cell suspensions, SSC were further enriched by differential plating on precoated gelatin dish. After Percoll gradient centrifugation, we found differential expression of SSC markers (GFRα-1 and UCHL-1) in the isolated cells from immature and adult testis. The RT-PCR results also confirmed the expression of differentiated spermatogonia markers (SYCP3 and STRA-8) in adult testicular cell suspensions. It suggests that isolated testicular germ cell population from adult testis are more heterogeneous than those of immature testis. The SSC isolated from adult testes were cultured in low-serum media containing 6-bromoindirubin-3′-oxime (BIO), an inhibitor of glycogen synthase kinase-3α (GSK3), and subsequently the cultures were maintained in the medium containing glial cell line-derived neurotropic factor (GDNF). The cell lines have characteristics resembling mouse GS cell lines as confirmed by their grape-like shape morphology, the expression of SSC markers (UCHL-1, DBA, and GFRa-1), and pluripotent stem cell markers (POU5F1, SOX2, KLF4). The SSC from immature testes were proliferated for more than 3 months in serum-free culture conditions in the presence of GDNF and bovine leukemia inhibitory factor (LIF). The cell lines had ES-like cell morphology, expressed pluripotent stem cell markers and SSC-specific markers. They differentiated in vitro into 3 germ layers confirmed by the expression of ectoderm (NESTIN), mesoderm (BMP4), and endoderm (GATA-6) markers by RT-PCR and neuron like-cells confirmed by the expression of glial fibrillary acidic protein (GFAP) by immunofluorescence analysis. In conclusion, these findings indicate an efficient method to enrich SSC without cell sorting method and different long-term culture systems subsequently established to maintain SSC from adult and immature testes. Furthermore, our data would be useful for further studies that aim to preserve endangered species and improve livestock production through genome editing technology.
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Okuyama M, Kato S, Sato S, Okazaki J, Kitamura Y, Ishikawa T, Sato Y, Isono S. Dynamic behaviour of the soft palate during nasal positive pressure ventilation under anaesthesia and paralysis: comparison between patients with and without obstructive sleep-disordered breathing. Br J Anaesth 2017; 120:181-187. [PMID: 29397128 DOI: 10.1016/j.bja.2017.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2017] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND Difficult mask ventilation is common and is known to be associated with sleep-disordered breathing (SDB). It is our hypothesis that the incidence of expiratory retropalatal (RP) airway closure (primary outcome) during nasal positive pressure ventilation (PPV) is more frequent in patients with SDB (apnea hypopnea index ≥5 h-1) than non-SDB subjects. METHODS The severity of SDB was assessed before surgery using a portable sleep monitor. In anaesthetized and paralysed patients with (n=11) and without SDB (n=9), we observed the behaviour of the RP airway endoscopically during nasal PPV with the mouth closed and determined the dynamic RP closing pressure, which was defined as the highest airway pressure above which the RP airway closure was reversed. The static RP closing pressure was obtained during cessation of mechanical ventilation in patients with dynamic RP closure during nasal PPV. RESULTS The expiratory RP airway closure accompanied by expiratory flow limitation occurred more frequently in SDB patients (9/11, 82%) than in non-SDB subjects (2/9, 22%; exact logistic regression analysis: P=0.022, odds ratio 3.6, 95% confidence interval 1.1-15.4). Receiver operating characteristic curve analyses indicated AHI >10h-1 and presence of habitual snoring as clinically useful predictors for the occurrence of RP closure during PPV. Dynamic RP closing pressure was greater than the static RP closing pressure by approximately 4-5 cm H2O. CONCLUSIONS Valve-like dynamic RP closure that limits expiratory flow during nasal PPV occurs more frequently in SDB patients.
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Affiliation(s)
- M Okuyama
- Department of Anesthesiology, Chiba University Hospital, Chiba, Japan
| | - S Kato
- Department of Anesthesiology, Chiba University Hospital, Chiba, Japan
| | - S Sato
- Department of Anesthesiology, Chiba University Hospital, Chiba, Japan
| | - J Okazaki
- Department of Anesthesiology and Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Kitamura
- Department of Anesthesiology, Chiba University Hospital, Chiba, Japan
| | - T Ishikawa
- Department of Anesthesiology and Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Sato
- Department of Global Clinical Research, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - S Isono
- Department of Anesthesiology and Graduate School of Medicine, Chiba University, Chiba, Japan.
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Kitamura Y, Nishio W, Tanaka H, Minami K, Okuma H, Yoshimura M. P1.03-036 Adjuvant Chemotherapy with Uracil-Tegafur for Pathological T1aN0M0 Lung Adenocarcinoma with Lymphatic Vessel Invasion. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.840] [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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17
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Miyazaki I, Murakami S, Kikuoka R, Isooka N, Kitamura Y, Asanuma M. Rotenone-induced dopaminergic neurotoxicity promoted by mesencephalic astrocyte dysfunction. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1644] [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: 11/30/2022]
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18
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Asanuma M, Miyazaki I, Isooka N, Kikuoka R, Wada K, Nakayama E, Shin K, Yamamoto D, Kitamura Y. Neuroprotective effects of rotigotine against dopaminergic neurodegeneration by targeting astrocytes. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Shimoi T, Hamada A, Kitamura Y, Nishijo T, Shimomura A, Shimizu C, Yoshida M, Kinoshita T, Fujiwara Y, Tamura K. 33P Somatic mutations of PIK3CA and AKT1 in Japanese breast cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw574.006] [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: 11/13/2022] Open
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Shimoi T, Hamada A, Kitamura Y, Nishijo T, Shimomura A, Shimizu C, Yoshida M, Kinoshita T, Fujiwara Y, Tamura K. 33P Somatic mutations of PIK3CA and AKT1 in Japanese breast cancer. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00193-9] [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: 11/28/2022] Open
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21
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Nishio W, Tane K, Kitamura Y, Yoshimura M. P-195RISK FACTORS FOR LOCAL RECURRENCE AFTER INTENTIONAL SEGMENTECTOMY FOR SMALL RADIOLOGICALLY INVASIVE LUNG CANCER: ARE THERE ANY SEGMENTECTOMY INDICATIONS FOR THE RIGHT UPPER LOBE? Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sako A, Kandakar J, Tamari N, Higa A, Yamaguchi K, Kitamura Y. Copper excess promotes propagation and induces proteomic change in root cultures of Hyoscyamus albus L. Plant Physiol Biochem 2016; 103:1-9. [PMID: 26945770 DOI: 10.1016/j.plaphy.2016.02.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 02/23/2016] [Accepted: 02/23/2016] [Indexed: 05/19/2023]
Abstract
Hyoscyamus albus L. seedlings respond positively to copper (Cu) excess. In the present study, to understand how roots cope with Cu excess, propagation and proteome composition in the presence of Cu were examined using a root culture system. When H. albus roots were cultured in a medium without Cu, root growth deteriorated. However, in the presence of Cu, root growth increased in a concentration-dependent manner, and vigorous lateral root development was observed at 200 μM Cu. Cu accumulation in the roots increased with the Cu supply. Subcellular fractionation revealed that the highest amount of Cu was present in the cell wall-containing fraction, followed by the soluble fraction. However, the highest specific incorporation of Cu, in terms of fresh weight, was in the mitochondria-rich fraction. High Cu levels enhanced respiration activity. Comparative proteomic analysis revealed that proteins involved in carbohydrate metabolism, de novo protein synthesis, cell division, and ATP synthesis increased in abundance, whereas the proteasome decreased. These results indicate that Cu promotes propagation of H. albus roots through the activation of the energy supply and anabolism. Newly propagated root tissues and newly generated proteins that bind to Cu may provide space and reservoirs for deposition of additional Cu.
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Affiliation(s)
- Ari Sako
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan
| | - Jebunnahar Kandakar
- Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
| | - Noriko Tamari
- Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
| | - Ataru Higa
- Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
| | - Kenichi Yamaguchi
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan; Division of Biochemistry, Faculty of Fisheries, Nagasaki University, Nagasaki 852-8521, Japan
| | - Yoshie Kitamura
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan; Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan.
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Abbasi R, Abe M, Abu-Zayyad T, Allen M, Azuma R, Barcikowski E, Belz J, Bergman D, Blake S, Cady R, Chae M, Cheon B, Chiba J, Chikawa M, Cho W, Fujii T, Fukushima M, Goto T, Hanlon W, Hayashi Y, Hayashida N, Hibino K, Honda K, Ikeda D, Inoue N, Ishii T, Ishimori R, Ito H, Ivanov D, Jui C, Kadota K, Kakimoto F, Kalashev O, Kasahara K, Kawai H, Kawakami S, Kawana S, Kawata K, Kido E, Kim H, Kim J, Kim J, Kitamura S, Kitamura Y, Kuzmin V, Kwon Y, Lan J, Lim S, Lundquist J, Machida K, Martens K, Matsuda T, Matsuyama T, Matthews J, Minamino M, Mukai Y, Myers I, Nagasawa K, Nagataki S, Nakamura T, Nonaka T, Nozato A, Ogio S, Ogura J, Ohnishi M, Ohoka H, Oki K, Okuda T, Ono M, Oshima A, Ozawa S, Park I, Pshirkov M, Rodriguez D, Rubtsov G, Ryu D, Sagawa H, Sakurai N, Scott L, Shah P, Shibata F, Shibata T, Shimodaira H, Shin B, Shin H, Smith J, Sokolsky P, Springer R, Stokes B, Stratton S, Stroman T, Suzawa T, Takamura M, Takeda M, Takeishi R, Taketa A, Takita M, Tameda Y, Tanaka H, Tanaka K, Tanaka M, Thomas S, Thomson G, Tinyakov P, Tkachev I, Tokuno H, Tomida T, Troitsky S, Tsunesada Y, Tsutsumi K, Uchihori Y, Udo S, Urban F, Vasiloff G, Wong T, Yamane R, Yamaoka H, Yamazaki K, Yang J, Yashiro K, Yoneda Y, Yoshida S, Yoshii H, Zollinger R, Zundel Z. Measurement of the proton-air cross section with Telescope Array’s Middle Drum detector and surface array in hybrid mode. Int J Clin Exp Med 2015. [DOI: 10.1103/physrevd.92.032007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
One of our co-workers was sensitized with a 1% DNCB solution in acetone. Biopsies were obtained from skin lesions 1, 2, 4, 8, 12, 24, 30, 36 and 48 hours after a challenge with 0.1% DNCB solution. In the upper dermis, a rapid decrease of tissue fibrinolytic activity was found which disappeared after 30 hours. In the lower dermis, biphasic changes were observed. Tissue fibrinolytic activity increased one hour and 12-36 hours after challenge, whereas at 48 hours, when erythema was most intensive, it decreased in comparison to the normal activity. Erythema and histological changes of the epidermis and the dermis appeared after approximately 12 hours. As for lymphocytes, T-cells were seen at first. Furthermore, B-cells were noted after approximately 30 hours when marked infiltration began to appear.
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Affiliation(s)
- F Shigemi
- Department of Dermatology, School of Medicine, Tokushima University, Kuramoto-cho, Tokushima 770, Japan
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25
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Kawahara Y, Kitamura Y. Changes in cell size and number and in rhizodermal development contribute to root tip swelling of Hyoscyamus albus roots subjected to iron deficiency. Plant Physiol Biochem 2015; 89:107-111. [PMID: 25734329 DOI: 10.1016/j.plaphy.2015.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 02/24/2015] [Indexed: 06/04/2023]
Abstract
Root tip swelling is a common phenomenon observed when plant roots are subjected to Fe deficiency. We analysed whether an increase in cell number or an enlargement of cell width was involved in this phenomenon. Root tips of Hyoscyamus albus cultured with or without Fe were stained with fluorescent SYTO14 and analysed by confocal laser-scanning microscopy. Time-course and position-based examination revealed that the inhibition of longitudinal cell elongation and acceleration of transverse cell enlargement under Fe deficiency started from the tips and then extended towards the base during the time-course period. An increase in cell number also occurred behind the tips. In addition, the development of rhizodermal protrusions was observed on the surface of roots subjected to Fe deficiency. These results indicated that changes in cell size and number and in root hair development were all involved in root tip swelling.
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Affiliation(s)
- Yuki Kawahara
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki, Japan
| | - Yoshie Kitamura
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki, Japan.
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26
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Tanaka M, Inoue K, Kitamura Y, Shimada A, Takano H. In vitro action of sho-seiryu-to on allergen-exposed mononuclear cells. Int J Immunopathol Pharmacol 2015; 27:607-10. [PMID: 25572740 DOI: 10.1177/039463201402700416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Although Sho-seiryu-to (SST), used as a traditional herbal (Kampo) medicine mainly in China and Korea, is shown to have immunomodulating potential, such as an anti-allergic one, its underlying mechanism has not been completely clarified. To partially address the issue, we explored its effects on allergen-exposed mononuclear cells. Male balb/c mice were intraperitoneally administered ovalbumin (OVA: 20 μg) plus alum or vehicle twice (Day 0 and Day 14). At Day 21, mice were sacrificed and splenocytes (mononuclear cells) were isolated and cultured in the presence or absence of OVA with or without SST. Thereafter, helper T-related cytokines in the culture supernatants were evaluated by means of ELISA. Protein level of interferon-γ was lower than 5.0 pg/mL in the supernatants from OVA non-exposed or -exposed mononuclear cells in the presence or absence of OVA stimulation. On the other hand, SST induced the cytokine from both types of mononuclear cells in the presence (P < 0.05) or absence of OVA stimulation as compared to corresponding control. By contrast, interleukin (IL)-4 level tended to be decreased by SST in OVA-non-exposed mononuclear cells as did IL-13 in both non-exposed and exposed mononuclear cells as compared to vehicle. In conclusion, immunoregulating efficacy by SST on allergy-prone subjects may include, at least in part, restoring helper T balance mainly through hyperproduction of IFN-γ against mononuclear cells such as lymphocytes.
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Affiliation(s)
- M Tanaka
- Center for Medical Science, International University of Health and Welfare, Kitakanemaru, Ohtawara, Tochigi, Japan
| | - K Inoue
- Center for Medical Science, International University of Health and Welfare, Kitakanemaru, Ohtawara, Tochigi, Japan
| | - Y Kitamura
- Center for Medical Science, International University of Health and Welfare, Kitakanemaru, Ohtawara, Tochigi, Japan
| | - A Shimada
- Laboratory of Pathology, School of Life and Environmental Science, Azabu University
| | - H Takano
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto, Japan
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Tanaka S, Sasaki H, Kimura T, Kameyama K, Nakamura T, Kitamura Y, Miwa T, Hirose Y, Yoshida K. GE-36 * MOLECULAR-GENETIC AND CLINICAL CHARACTERISTICS OF THE "ASTROCYTIC" GLIOMAS WITH TOTAL 1p19q LOSS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou256.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sasaki H, Hirose Y, Yazaki T, Kimura T, Fujiwara H, Kitamura Y, Katayama M, Toda M, Ohira T, Yoshida K. MOLECULAR-GUIDED NEOADJUVANT APPROACH FOR CHEMOSENSITIVE GLIOMAS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou209.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Xu X, Iwamoto Y, Kitamura Y, Oda T, Muramatsu T. Root Growth-promoting Activity of Unsaturated Oligomeric Uronates from Alginate on Carrot and Rice Plants. Biosci Biotechnol Biochem 2014; 67:2022-5. [PMID: 14519996 DOI: 10.1271/bbb.67.2022] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The root elongation activity of unsaturated oligomeric uronates from alginate on carrot and rice plants was investigated. Unsaturated oligomeric uronates were prepared by digesting polymannuronate (PM) and polyguluronate (PG) with an alginate lyase purified from Pseudoalteromonas sp. strain No. 272. The root elongation activity was measured by elongation in length of carrot- and rice-excised root incubated in the B5-medium containing 0.8% agar in the dark. PM and PG showed no activity, but the enzymatic digestion mixtures of PG had promoting activity on roots of both plants at a final concentration of 0.5 mg/ml. The maximum activity was obtained at 0.75 mg/ml. The dependence of activity on degree of polymerization of the uronates was tested and the pentamer was most active, but the mechanism of the action of unsaturated uronates on the cells remains to be solved.
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Affiliation(s)
- Xu Xu
- Division of Biochemistry, Faculty of Fisheries, Nagasaki University, Japan
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Kitamura H, Tsukamoto T, Shibata T, Masumori N, Fujimoto H, Hirao Y, Fujimoto K, Kitamura Y, Tomita Y, Tobisu K, Niwakawa M, Naito S, Eto M, Kakehi Y. Randomised phase III study of neoadjuvant chemotherapy with methotrexate, doxorubicin, vinblastine and cisplatin followed by radical cystectomy compared with radical cystectomy alone for muscle-invasive bladder cancer: Japan Clinical Oncology Group Study JCOG0209. Ann Oncol 2014; 25:1192-8. [PMID: 24669010 DOI: 10.1093/annonc/mdu126] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND This study aimed to determine the clinical benefit of neoadjuvant methotrexate, doxorubicin, vinblastine, and cisplatin (MVAC) in patients with muscle-invasive bladder cancer (MIBC) treated with radical cystectomy. PATIENTS AND METHODS Patients with MIBC (T2-4aN0M0) were randomised to receive two cycles of neoadjuvant MVAC followed by radical cystectomy (NAC arm) or radical cystectomy alone (RC arm). The primary end point was overall survival (OS). Secondary end points were progression-free survival, surgery-related complications, adverse events during chemotherapy, proportion with no residual tumour in the cystectomy specimens, and quality of life. To detect an improvement in 5-year OS from 45% in the RC arm to 57% in the NAC arm with 80% power, 176 events were required per arm. RESULTS Patients (N = 130) were randomly assigned to the RC arm (N = 66) and the NAC arm (N = 64). The patient registration was terminated before reaching the initially planned number of patients because of slow accrual. At the second interim analysis just after the early stoppage of patient accrual, the Data and Safety Monitoring Committee recommended early publication of the results because the trial did not have enough power to draw a confirmatory conclusion. OS of the NAC arm was better than that of the RC arm, although the difference was not statistically significant [hazard ratio 0.65, multiplicity adjusted 99.99% confidence interval 0.19-2.18, one-sided P = 0.07]. In the NAC arm and the RC arm, 34% and 9% of the patients had pT0, respectively (P < 0.01). In subgroup analyses, OS in almost all subgroups was in favour of NAC. CONCLUSIONS This trial showed a significantly increased pT0 proportion and favourable OS of patients who received neoadjuvant MVAC. NAC with MVAC can still be considered promising as a standard treatment. UMIN CLINICAL TRIALS REGISTRY IDENTIFIER C000000093.
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Affiliation(s)
- H Kitamura
- Department of Urology, Sapporo Medical University School of Medicine, Sapporo
| | - T Tsukamoto
- Department of Urology, Sapporo Medical University School of Medicine, Sapporo
| | - T Shibata
- Japan Clinical Oncology Group Data Centre, Multi-institutional Clinical Trial Support Centre, National Cancer Centre, Tokyo
| | - N Masumori
- Department of Urology, Sapporo Medical University School of Medicine, Sapporo
| | - H Fujimoto
- Department of Urology, National Cancer Centre Hospital, Tokyo
| | - Y Hirao
- Department of Urology, Nara Medical University, Kashihara
| | - K Fujimoto
- Department of Urology, Nara Medical University, Kashihara
| | - Y Kitamura
- Department of Urology, Niigata Cancer Centre Hospital, Niigata
| | - Y Tomita
- Department of Urology, Yamagata University Faculty of Medicine, Yamagata
| | - K Tobisu
- Department of Urology, Shizuoka Cancer Centre Hospital, Shizuoka
| | - M Niwakawa
- Department of Urology, Shizuoka Cancer Centre Hospital, Shizuoka
| | - S Naito
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka
| | - M Eto
- Department of Urology, Faculty of Life Sciences, Kumamoto University, Kumamoto
| | - Y Kakehi
- Department of Urology, Kagawa University Faculty of Medicine, Kagawa, Japan
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Shimoi T, Mizutani K, Kojima D, Kitamura Y, Hotta K, Ogawa H, Oka K. Identification of oscillatory firing neurons associated with locomotion in the earthworm through synapse imaging. Neuroscience 2014; 268:149-58. [PMID: 24657777 DOI: 10.1016/j.neuroscience.2014.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 03/06/2014] [Accepted: 03/10/2014] [Indexed: 11/16/2022]
Abstract
We used FM imaging to identify neurons that receive sensory feedback from the body wall in a circuit for octopamine (OA)-evoked rhythmic locomotion in the earthworm, Eisenia fetida. We visualized synapses in which postsynaptic neurons receive the sensory feedback, by using FM1-43 dye to label the synapses of both motor and sensory pathways that are associated with locomotion, then clearing the motor pathway synapse labeling, and finally identifying the target synapses by distinguishing physiologically functional synapses through destaining using a high-K(+) solution. A pair of synaptic regions associated with the sensory feedback was found to be located two or three cell body-widths away from the midline, between the anterior parts of the roots of the second lateral nerves (LNs) at the segmental ganglia (SGs). Using conventional intracellular recording and dye loading of the cell bodies surrounding these synaptic regions, we identified a pair of bilateral neurons with cell bodies larger than those of other cells in these regions, and named them "Oscillatory firing neurons Projecting to Peripheral nerves" (OPPs). These had a bipolar shape and projected neurites to the ipsilateral first and third LNs, fired rhythmically, and had a burst timing synchronized with the motor pattern bursts from the ipsilateral first LNs. Current injection into an OPP caused firing in the ipsilateral first LNs, supporting the hypothesis that OPPs functionally project to the peripheral nerves. OPPs also sent neurites to the adjacent anterior and posterior SGs, suggesting connections with the adjacent segments. We conclude that FM imaging can be used to identify neurons involved in specific functions, and that OPPs are the first neurons to be associated with OA-induced locomotion in the earthworm.
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Affiliation(s)
- T Shimoi
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - K Mizutani
- Department of Human and Information Science, Tokai University, Kanagawa, Japan
| | - D Kojima
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - Y Kitamura
- Department of Mathematical Sciences and Physics, College of Science and Engineering, Kanto Gakuin University, Yokohama, Japan
| | - K Hotta
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan
| | - H Ogawa
- Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan
| | - K Oka
- Center for Biosciences and Informatics, Graduate School of Science and Technology, Keio University, Yokohama, Japan.
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Nomura Y, Kaneko M, Saito R, Okuma Y, Kitamura Y, Takata K, Nishi A. A Novel Therapeutic Target Against Alzeimer's Disease: HRD1 as Endoplasmic Reticulum Stress-Related Ubiquitin Ligase. Neurobiol Aging 2014. [DOI: 10.1016/j.neurobiolaging.2014.01.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abu-Zayyad T, Aida R, Allen M, Anderson R, Azuma R, Barcikowski E, Belz JW, Bergman DR, Blake SA, Cady R, Cheon BG, Chiba J, Chikawa M, Cho EJ, Cho WR, Fujii H, Fujii T, Fukuda T, Fukushima M, Gorbunov D, Hanlon W, Hayashi K, Hayashi Y, Hayashida N, Hibino K, Hiyama K, Honda K, Iguchi T, Ikeda D, Ikuta K, Inoue N, Ishii T, Ishimori R, Ivanov D, Iwamoto S, Jui CCH, Kadota K, Kakimoto F, Kalashev O, Kanbe T, Kasahara K, Kawai H, Kawakami S, Kawana S, Kido E, Kim HB, Kim HK, Kim JH, Kim JH, Kitamoto K, Kitamura S, Kitamura Y, Kobayashi K, Kobayashi Y, Kondo Y, Kuramoto K, Kuzmin V, Kwon YJ, Lan J, Lim SI, Machida S, Martens K, Matsuda T, Matsuura T, Matsuyama T, Matthews JN, Minamino M, Miyata K, Murano Y, Myers I, Nagasawa K, Nagataki S, Nakamura T, Nam SW, Nonaka T, Ogio S, Ohnishi M, Ohoka H, Oki K, Oku D, Okuda T, Oshima A, Ozawa S, Park IH, Pshirkov MS, Rodriguez DC, Roh SY, Rubtsov GI, Ryu D, Sagawa H, Sakurai N, Sampson AL, Scott LM, Shah PD, Shibata F, Shibata T, Shimodaira H, Shin BK, Shin JI, Shirahama T, Smith JD, Sokolsky P, Stokes BT, Stratton SR, Stroman T, Suzuki S, Takahashi Y, Takeda M, Taketa A, Takita M, Tameda Y, Tanaka H, Tanaka K, Tanaka M, Thomas SB, Thomson GB, Tinyakov P, Tkachev I, Tokuno H, Tomida T, Troitsky S, Tsunesada Y, Tsutsumi K, Tsuyuguchi Y, Uchihori Y, Udo S, Ukai H, Vasiloff G, Wada Y, Wong T, Wood M, Yamakawa Y, Yamane R, Yamaoka H, Yamazaki K, Yang J, Yoneda Y, Yoshida S, Yoshii H, Zhou X, Zollinger R, Zundel Z. Upper limit on the flux of photons with energies above1019 eVusing the Telescope Array surface detector. Int J Clin Exp Med 2013. [DOI: 10.1103/physrevd.88.112005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hashimoto J, Kitamura Y, Takashima Y, Kodera Y, Shimma S, Hamada A, Fujiwara Y, Koizumi F, Tamura K. Synergistic Interaction Betweem Olaparib, a Parp Inhibitor, and Cytotoxic Agent in Triple Negative Breast Cancer. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Hattori A, Suzuki K, Maeyashiki T, Fukui M, Kitamura Y, Matsunaga T, Miyasaka Y, Takamochi K, Oh S. The presence of air bronchogram is a novel predictor of negative nodal involvement in radiologically pure-solid lung cancer. Eur J Cardiothorac Surg 2013; 45:699-702. [DOI: 10.1093/ejcts/ezt467] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Khandakar J, Haraguchi I, Yamaguchi K, Kitamura Y. A small-scale proteomic approach reveals a survival strategy, including a reduction in alkaloid biosynthesis, in Hyoscyamus albus roots subjected to iron deficiency. Front Plant Sci 2013; 4:331. [PMID: 24009619 PMCID: PMC3755260 DOI: 10.3389/fpls.2013.00331] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 08/06/2013] [Indexed: 05/22/2023]
Abstract
Hyoscyamus albus is a well-known source of the tropane alkaloids, hyoscyamine and scopolamine, which are biosynthesized in the roots. To assess the major biochemical adaptations that occur in the roots of this plant in response to iron deficiency, we used a small-scale proteomic approach in which 100 mg of root tips were treated with and without Fe, respectively, for 5 days. Two-dimensional mini gels showed that 48 spots were differentially accumulated between the two conditions of Fe availability and a further 36 proteins were identified from these spots using MALDI-QIT-TOF mass spectrometry. The proteins that showed elevated levels in the roots lacking Fe were found to be associated variously with carbohydrate metabolism, cell differentiation, secondary metabolism, and oxidative defense. Most of the proteins involved in carbohydrate metabolism were increased in abundance, but mitochondrial NAD-dependent malate dehydrogenase was decreased, possibly resulting in malate secretion. Otherwise, all the proteins showing diminished levels in the roots were identified as either Fe-containing or ATP-requiring. For example, a significant decrease was observed in the levels of hyoscyamine 6β-hydroxylase (H6H), which requires Fe and is involved in the conversion of hyoscyamine to scopolamine. To investigate the effects of Fe deficiency on alkaloid biosynthesis, gene expression studies were undertaken both for H6H and for another Fe-dependent protein, Cyp80F1, which is involved in the final stage of hyoscyamine biosynthesis. In addition, tropane alkaloid contents were determined. Reduced gene expression was observed in the case of both of these proteins and was accompanied by a decrease in the content of both hyoscyamine and scopolamine. Finally, we have discussed energetic and Fe-conservation strategies that might be adopted by the roots of H. albus to maintain iron homeostasis under Fe-limiting conditions.
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Affiliation(s)
| | - Izumi Haraguchi
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki UniversityNagasaki, Japan
| | - Kenichi Yamaguchi
- Graduate School of Science and Technology, Nagasaki UniversityNagasaki, Japan
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki UniversityNagasaki, Japan
- Division of Biochemistry, Faculty of Fisheries, Nagasaki UniversityNagasaki, Japan
| | - Yoshie Kitamura
- Graduate School of Science and Technology, Nagasaki UniversityNagasaki, Japan
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki UniversityNagasaki, Japan
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Yoshimi M, Kitamura Y, Isshiki S, Saito T, Yasumoto K, Terachi T, Yamagishi H. Variations in the structure and transcription of the mitochondrial atp and cox genes in wild Solanum species that induce male sterility in eggplant (S. melongena). Theor Appl Genet 2013; 126:1851-9. [PMID: 23604528 DOI: 10.1007/s00122-013-2097-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 04/02/2013] [Indexed: 05/05/2023]
Abstract
In order to determine the molecular basis of cytoplasmic male sterility (CMS) in alloplasmic lines of eggplant, the genomic structures and transcription patterns of mitochondrial ATP synthase subunit (atp) and cytochrome oxidase subunit (cox) genes were studied for wild and cultivated eggplants. Alloplasmic eggplant lines with cytoplasms of wild Solanum species showing either anther indehiscent type of CMS or non-pollen production type of CMS were studied with the cultivated eggplant Solanum melongena, used as a control. Southern hybridization of the mitochondrial genes indicated the difference between the two types of CMS and showed complete identity within each type. The cytoplasmic patterns of all wild species differed from that of the cultivated eggplant. Thus, the cytoplasm of the six wild eggplants and the one cultivated eggplant was classified into three groups. Male sterile plants of both types of CMS showed novel transcription patterns of atp1, whereas a different transcription pattern of cox2 was observed only in the anther indehiscent type. Based on these differences, we determined the DNA sequences of about a 4 kbp segment in the atp1 region. Although the coding and 3' flanking regions were almost identical among the cytoplasms, the 5' flanking region was completely different and novel open reading frames (orfs) were found for each of the CMS types and the cultivated eggplant. The cytoplasm of Solanum kurzii inducing the anther indehiscent type CMS had orf312, and those of Solanum aethiopicum and Solanum grandifolium of non-pollen production type CMS had orf218. The correspondence between the transcription patterns of these orfs and phenotypic expression of male sterility strongly suggests that these orfs are causal genes for each type of CMS.
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Affiliation(s)
- M Yoshimi
- Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo, Kita, Kyoto 603-8555, Japan
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Namba Y, Suzuki R, Sasaki J, Takayasu M, Watanabe K, Kenji D, Hayashi M, Kitamura Y, Kawamo M, Masaki H, Kyuuno E, Hayashi M, Yamaguchi M, Maeda A. Thallium group poisoning incident in Japan 2011. Crit Care 2013. [PMCID: PMC3642765 DOI: 10.1186/cc12207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
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Nakadate Y, Kitamura Y, Tamura T, Koizumi F. Antibody-Dependent Cellular Cytotoxicity of Cetuximab Against Colorectal Cancer Cell Lines with Wild-Type and Mutant KRAS. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32325-5] [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: 10/25/2022] Open
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Higa A, Khandakar J, Mori Y, Kitamura Y. Increased de novo riboflavin synthesis and hydrolysis of FMN are involved in riboflavin secretion from Hyoscyamus albus hairy roots under iron deficiency. Plant Physiol Biochem 2012; 58:166-73. [PMID: 22819862 DOI: 10.1016/j.plaphy.2012.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 07/02/2012] [Indexed: 05/08/2023]
Abstract
Riboflavin secretion by Hyoscyamus albus hairy roots under Fe deficiency was examined to determine where riboflavin is produced and whether production occurs via an enhancement of riboflavin biosynthesis or a stimulation of flavin mononucleotide (FMN) hydrolysis. Confocal fluorescent microscopy showed that riboflavin was mainly localized in the epidermis and cortex of the root tip and, at the cellular level, in the apoplast. The expressions of three genes involved in the de novo biosynthesis of riboflavin (GTP cyclohydrolase II/3,4-dihydroxy-2-butanone 4-phosphate synthase; 6,7-dimethyl-8-ribityllumazine synthase; riboflavin synthase) were compared between Fe-starved and Fe-replete roots over a time-course of 7 days, using RT-PCR. All three genes were found to be highly expressed over the period 1-7 days in the roots cultured under Fe deficiency. Since riboflavin secretion began to be detected only from 3 days, there was a lag phase observed between the increased transcript accumulations and riboflavin secretion. To determine whether FMN hydrolysis might contribute to the riboflavin secretion in Fe-deficient root cultures, FMN hydrolase activity was determined and was found to be substantially increased after 3 days, when riboflavin secretion became detectable. These results suggested that not only de novo riboflavin synthesis but also the hydrolysis of FMN contributes to riboflavin secretion under conditions of Fe deficiency. Respiration activity was assayed during the time-course, and was also found to be enhanced after 3 days under Fe deficiency, suggesting a possible link with riboflavin secretion. On the other hand, several respiratory inhibitors were found not to affect riboflavin synthase transcript accumulation.
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Affiliation(s)
- Ataru Higa
- Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
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Kitamura Y, Yoshida H, Ottomo S, Mizuma M, Motoi F, Rikiyama T, Katayose Y, Egawa S, Unno M. 278 CD133-expressing Cells Have Cancer Stem Cell-like Properties in Cholangiocarcinoma. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70973-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nishimoto M, Kurita A, Kitamura Y, Akimoto H. PP-431 THERAPEUTIC STRATEGY OF ACUTE TYPE A THROMBOSED AORTIC DISSECTION. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70549-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yakabe Y, Terato M, Higa A, Yamada K, Kitamura Y. Iron availability alters ascorbate-induced stress metabolism in Glehnia littoralis root cultures. Phytochemistry 2012; 74:100-104. [PMID: 22115175 DOI: 10.1016/j.phytochem.2011.10.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 09/26/2011] [Accepted: 10/31/2011] [Indexed: 05/31/2023]
Abstract
Our previous study indicated that formation of furanocoumarin phytoalexins could be induced in Glehnia littoralis root cultures by treatment with 10-40 mM ascorbic acid (AsA). This furanocoumarin production is much less evident when G. littoralis roots are treated with AsA under iron-deficient conditions. Instead, two large unknown peaks appeared in the HPLC chromatogram, whose chemical structures were elucidated by spectroscopic methods as being 6, β-dihydroxyphenethyl ferulate (DF) and 6-hydroxyphenethyl ferulate (HF), respectively. Their maximal level of induction was observed at 20 mM AsA, and the production of DF always exceeded that of HF. This is the first report of these compounds in G. littoralis and of the modulation of the phytoalexin biosynthetic pathway in G. littoralis by iron deficiency.
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Affiliation(s)
- Yukino Yakabe
- Graduate School of Science and Technology, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
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Ishizaki F, Hoque MA, Nishiyama T, Kawasaki T, Kasahara T, Hara N, Takizawa I, Saito T, Kitamura Y, Akazawa K, Takahashi K. External Validation of the UCSF-CAPRA (University of California, San Francisco, Cancer of the Prostate Risk Assessment) in Japanese Patients Receiving Radical Prostatectomy. Jpn J Clin Oncol 2011; 41:1259-64. [DOI: 10.1093/jjco/hyr136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kawasaki H, Takatori S, Zamami Y, Koyama T, Goda M, Hirai K, Tangsucharit P, Jin X, Hobara N, Kitamura Y. Paracrine control of mesenteric perivascular axo-axonal interaction. Acta Physiol (Oxf) 2011; 203:3-11. [PMID: 20887357 DOI: 10.1111/j.1748-1716.2010.02197.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Immunohistochemical study of rat mesenteric arteries showed dense innervation of adrenergic nerves, calcitonin gene-related peptide (CGRP)-containing nerves (CGRPergic nerves), nitric oxide-containing nerves (nitrergic nerves). Double-immunostaining revealed that most CGRPergic or nitrergic nerves were in close contact with adrenergic nerves. CGRPergic and transient receptor potential vanilloid-1 (TRPV1)-immunopositive nerves appeared in the same neurone. In rat perfused mesenteric vascular beds without endothelium and with active tone, perfusion of nicotine, or bolus injection of capsaicin and acetylcholine and periarterial nerve stimulation (PNS) lowered pH levels of out flowed perfusate concomitant with vasodilation. Cold-storage denervation of preparations abolished pH lowering induced by nicotine and PNS. Guanethidine inhibited PNS- and nicotine-, but not acetylcholine- and capsaicin-, induced pH lowering. Pharmacological analysis showed that protons were released not only from adrenergic nerves but also from CGRPergic nerves. A study using a fluorescent pH indicator demonstrated that nicotine, acetylcholine and capsaicin applied outside small mesenteric artery lowered perivascular pH levels, which were not observed in Ca(2+) free medium. Exogenously injected hydrochloric acid in denuded preparations induced pH lowering and vasodilation, which was inhibited by denervation, TRPV1 antagonists and capsaicin without affecting pH lowering. These results suggest that excitement of adrenergic nerves releases protons to activate TRPV1 in CGRPergic nerves and thereby induce vasodilation. It is also suggested that CGRPergic nerves release protons with exocytosis to facilitate neurotransmission via a positive feedback mechanism.
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Affiliation(s)
- H Kawasaki
- Department of Clinical Pharmaceutical Science, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan.
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Mizuguchi H, Kitamura Y, Kondo Y, Kuroda W, Yoshida H, Miyamoto Y, Hattori M, Fukui H, Takeda N. Preseasonal prophylactic treatment with antihistamines suppresses nasal symptoms and expression of histamine H₁ receptor mRNA in the nasal mucosa of patients with pollinosis. ACTA ACUST UNITED AC 2011; 32:745-8. [PMID: 21225011 DOI: 10.1358/mf.2010.32.10.1533687] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Administration of antihistamines 2-4 weeks before the pollen season showed a greater inhibitory effect on nasal allergy symptoms in patients with seasonal allergic rhinitis. However, the mechanism of slow-onset effects of preseasonal treatment with antihistamines remains unclear. Here, we investigated the effect of preseasonal prophylactic treatment with antihistamines on nasal symptoms and the expression of histamine H₁ receptor (H1R) mRNA of the nasal mucosa in patients with cedar pollen pollinosis. During the peak pollen period, the expression of H1R mRNA in the nasal mucosa and the scores of sneezing and watery rhinorrhea in patients receiving preseasonal prophylactic treatment with antihistamines were significantly suppressed in comparison with those in the patients without treatment. Moreover, there was a significant correlation between the nasal symptoms and the expression of H1R mRNA in both patients with or without preseasonal prophylactic treatment. These findings suggest that preseasonal prophylactic treatment with antihistamines is more effective than on-seasonal administration to patients with pollinosis in reducing nasal symptoms during the peak pollen period by suppressing H1R gene expression in the nasal mucosa.
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Affiliation(s)
- H Mizuguchi
- Department of Molecular Pharmacology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Iseki K, Hirano T, Fukushi Y, Kitamura Y, Miyazaki S, Takada M, Sugawara M, Saitoh H, Miyazaki K. The pH Dependent Uptake of Enoxacin by Rat Intestinal Brush-border Membrane Vesicles. J Pharm Pharmacol 2011; 44:722-6. [PMID: 1360522 DOI: 10.1111/j.2042-7158.1992.tb05507.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Abstract
The mechanism of the intestinal transport of enoxacin, an orally active fluoroquinolone antibiotic, has been investigated using brush-border membrane vesicles isolated from rat small intestine. The initial rate and time-course of enoxacin uptake were considerably dependent upon the medium pH (pH 5·5 > pH 7·5) and upon the percent ionization of the carboxyl group (pKa 6·2, anionic charge), namely, the degree of uptake of cationic form was higher than that of the zwitterionic form. There was evidence of transport into the intravesicular space as shown by the effect of extravesicular medium osmolarity on enoxacin uptake at steady state (30 min). This transport across the brush-border membrane was stimulated by the valinomycin-induced K+-diffusion potential (interior negative) and an outward H+-diffusion potential. Furthermore, changing the pH of the medium from 5·5 to 7·5 significantly decreased the effect of valinomycin-induced K+-diffusion potential on the enoxacin uptake. These results suggest that the uptake behaviour of the cationic form of enoxacin plays an important role in the intestinal absorption process of enoxacin.
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Affiliation(s)
- K Iseki
- Department of Pharmacy, Hokkaido University Hospital, School of Medicine, Sapporo, Japan
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Barker CA, Chang M, Lassman AB, Beal K, Chan TA, Hunter K, Grisdale K, Ritterhouse M, Moustakas A, Iwamoto FM, Kreisl TN, Sul J, Kim L, Butman J, Albert P, Fine HA, Chamberlain MC, Alexandru D, Glantz MJ, Kim L, Chamberlain MC, Bota DA, Takahashi K, Ikeda N, Kajimoto Y, Miyatake S, Kuroiwa T, Iwamoto F, Lamborn K, Kuhn J, Wen P, Yung WKA, Gilbert M, Chang S, Lieberman F, Prados M, Fine H, Lu-Emerson C, Norden AD, Drappatz J, Quant EC, Ciampa AS, Doherty LM, LaFrankie DC, Wen PY, Sherman JH, Moldovan K, Yeoh HK, Starke BM, Pouratian N, Shaffrey ME, Schiff D, O'Connor PC, Kroon HA, Recht L, Montano N, Cenci T, Martini M, D'Alessandris QG, Banna GL, Maira G, De Maria R, Larocca LM, Pallini R, Kim CH, Yang MS, Cheong JH, Kim JM, Shonka N, Gilbert M, Alfred Yung WK, Piao Y, Liu J, Bekele N, Wen P, Chen A, Heymach J, de Groot J, Gilbert MR, Wang M, Aldape K, Sorensen AG, Mikkelsen T, Bokstein F, Woo SY, Chmura SJ, Choucair AK, Mehta M, Perez Segura P, Gil M, Balana C, Chacon I, Munoz J, Martin M, Flowers A, Salner A, Gaziel TB, Soerensen M, Hasselbalch B, Poulsen HS, Lassen U, Peyre M, Cartalat-Carel S, Meyronet D, Sunyach MP, Jouanneau E, Guyotat J, Jouvet A, Frappaz D, Honnorat J, Ducray F, Wagle N, Nghiemphu PL, Lai A, Cloughesy TF, Kairouz VF, Elias EF, Chahine GY, Comair YG, Dimassi H, Kamar FG, Parchman AJ, Nock CJ, Bartolomeo J, Norden AD, Drappatz J, Ciampa AS, Doherty LM, LaFrankie DC, Ruland S, Quant EC, Beroukhim R, Wen PY, Graber JJ, Lassman AB, Kaley T, Johnson DR, Kimmel DW, Burch PA, Cascino TL, Giannini C, Wu W, Buckner JC, Dirier A, Abacioglu U, Okkan S, Pak Y, Guney YY, Aksu G, Soyuer S, Oksuzoglu B, Meydan D, Zincircioglu B, Yumuk PF, Alco G, Keven E, Ucer AR, Tsung AJ, Prabhu SS, Shonka NA, Alistar AT, van den Bent M, Taal W, Sleijfer S, van Heuvel I, Smitt PAS, Bromberg JE, Vernhout I, Porter AB, Dueck AC, Karlin NJ, Hiramatsu R, Kawabata S, Miyatake SI, Kuroiwa T, Easson MW, Vicente MGH, Sahebjam S, Garoufalis E, Guiot MC, Muanza T, Del Maestro R, Kavan P, Smolin AV, Konev A, Nikolaeva S, Shamanskaya Y, Malysheva A, Strelnikov V, Vranic A, Prestor B, Pizem J, Popovic M, Khatua S, Finlay J, Nelson M, Gonzalez I, Bruggers C, Dhall G, Fu BD, Linskey M, Bota D, Walbert T, Puduvalli V, Ozawa T, Brennan CW, Wang L, Squatrito M, Sasayama T, Nakada M, Huse JT, Pedraza A, Utsuki S, Tandon A, Fomchenko EI, Oka H, Levine RL, Fujii K, Ladanyi M, Holland EC, Raizer J, Avram MJ, Kaklamani V, Cianfrocca M, Gradishar W, Helenowski I, McCarthy K, Mulcahy M, Rademaker A, Grimm S, Landolfi JC, Chen S, Peeraully T, Anthony P, Linendoll NM, Zhu JJ, Yao K, Mignano J, Pfannl R, Pan E, Vera-Bolanos E, Armstrong TS, Bekele BN, Gilbert MR, Alexandru D, Glantz MJ, Kim L, Chamberlain MC, Bota DA, Albrecht V, Juerchott K, Selbig J, Tonn JC, Schichor C, Sawale KB, Wolff J, Vats T, Ketonen L, Khasraw M, Kaley T, Panageas K, Reiner A, Goldlust S, Tabar V, Green RM, Woyshner EA, Cloughesy TF, Abe T, Morishige M, Shiqi K, Momii Y, Sugita K, Fukuyoshi Y, Kamida T, Fujiki M, Kobayashi H, Lavon I, Refael M, Zrihan D, Siegal T, Elias EF, Kairouz VF, Chahine GY, Comair YG, Dimassi H, Kamar FG, Tham CK, See SJ, Toh CK, Kang SH, Park KJ, Kim CY, Yu MO, Park CK, Park SH, Chung YG, Park KJ, Yu MO, Kang SH, Cho TH, Chung YG, Sasaki H, Sano K, Nariai T, Uchino Y, Kitamura Y, Ohira T, Yoshida K, Kirson ED, Wasserman Y, Izhaki A, Mordechovich D, Gurvich Z, Dbaly V, Vymazal J, Tovarys F, Salzberg M, Rochlitz C, Goldsher D, Palti Y, Ram Z, Gutin PH, Furuse M, Miyatake SI, Kawabata S, Kuroiwa T, Torcuator RG, Ibaoc K, Rafael A, Mariano M, Reardon DA, Peters K, Desjardins A, Sampson J, Vredenburgh JJ, Gururangan S, Friedman HS, Le Rhun E, Kotecki N, Zairi F, Baranzelli MC, Faivre-Pierret M, Dubois F, Bonneterre J, Arenson EB, Arenson JD, Arenson PK, Pierick M, Jensen W, Smith DB, Wong ET, Gautam S, Malchow C, Lun M, Pan E, Brem S, Raizer J, Grimm S, Chandler J, Muro K, Rice L, McCarthy K, Mrugala M, Johnston SK, Chamberlain M, Marosi C, Handisurya A, Kautzky-Willer A, Preusser M, Elandt K, Widhalm G, Dieckmann K, Torcuator RG, Opinaldo P, Chua E, Barredo C, Cuanang J, Grimm S, Phuphanich S, Recht LD, Rosenfeld SS, Chamberlain MC, Zhu JJ, Fadul CE, Swabb EA, Pope C, Beelen AP, Raizer JJ, Kim IH, Park CK, Han JH, Lee SH, Kim CY, Kim TM, Kim DW, Kim JE, Paek SH, Kim IA, Kim YJ, Kim JH, Nam DH, Rhee CH, Lee SH, Park BJ, Kim DG, Heo DS, Jung HW, Desjardins A, Peters KB, Vredenburgh JJ, Friedman HS, Reardon DA, Becker K, Baehring J, Hammond SN, Norden AD, Fisher DC, Wong ET, Cote GM, Ciampa AS, Doherty LM, Ruland SF, LaFrankie DC, Wen PY, Drappatz J, Brandes AA, Franceschi E, Tosoni A, Poggi R, Agati R, Bartolini S, Spagnolli F, Pozzati E, Marucci G, Ermani M, Taillibert S, Guillevin R, Dehais C, Bellanger A, Delattre JY, Omuro A, Taillibert S, Hoang-Xuan K, Barrie M, Guiu S, Chauffert B, Cartalat-Carel S, Taillandier L, Fabbro M, Laigre M, Guillamo JS, Geffrelot J, Rouge TDLM, Bonnetain F, Chinot O, Gil MJ, de las Penas R, Reynes G, Balana C, Perez-Segura P, Garcia-Velasco A, Gallego O, Herrero A, de Lucas CFC, Benavides M, Perez-Martin X, Mesia C, Martinez-Garcia M, Muggeri AD, Cervio A, Rojas M, Arakaki N, Sevlever GE, Diez BD, Muggeri AD, Cerrato S, Martinetto H, Diez BD, Peereboom DM, Brewer CJ, Suh JH, Chao ST, Parsons MW, Elson PJ, Vogelbaum MA, Sade B, Barnett GH, Shonka NA, Yung WKA, Bekele N, Gilbert MR, Kobyakov G, Absalyamova O, Amanov R, Rauschkolb PK, Drappatz J, Batchelor TT, Meyer LP, Fadul CE, Lallana EC, Nghiemphu PL, Kohanteb P, Lai A, Green RM, Cloughesy TF, Mrugala MM, Lee LK, Graham CA, Fink JR, Spence AM, Portnow J, Badie B, Liu X, Frankel P, Chen M, Synold TW, Al Jishi AA, Golan J, Polley MYC, Lamborn KR, Chang SM, Butowski N, Clarke JL, Prados M, Grommes C, Oxnard GR, Kris MG, Miller VA, Pao W, Lassman AB, Renfrow J, DeTroye A, Chan M, Tatter S, Ellis T, McMullen K, Johnson A, Mott R, Lesser GJ, Cavaliere R, Abrey LE, Mason WP, Lassman AB, Perentesis J, Ivy P, Villalona M, Nayak L, Fleisher M, Gonzalez-Espinoza R, Reiner A, Panageas K, Lin O, Liu CM, Deangelis LM, Omuro A, Taylor LP, Ammirati M, Lamki T, Zarzour H, Grecula J, Dudley RW, Kavan P, Garoufalis E, Guiot MC, Del Maestro RF, Maurice C, Belanger K, Moumdjian R, Dufresne S, Fortin C, Fortin MA, Berthelet F, Renoult E, Belair M, Rouleau D, Gallego O, Benavides M, Segura PP, Balana C, Gil MJG, Berrocal A, Reynes G, Garcia JL, Mazarico J, Bague S. Medical and Neuro-Oncology. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s6] [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: 11/13/2022] Open
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Higa A, Mori Y, Kitamura Y. Iron deficiency induces changes in riboflavin secretion and the mitochondrial electron transport chain in hairy roots of Hyoscyamus albus. J Plant Physiol 2010; 167:870-8. [PMID: 20181408 DOI: 10.1016/j.jplph.2010.01.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 01/21/2010] [Accepted: 01/22/2010] [Indexed: 05/08/2023]
Abstract
Hyoscyamus albus hairy roots secrete riboflavin under Fe-deficient conditions. To determine whether this secretion was linked to an enhancement of respiration, both riboflavin secretion and the reduction of 2,3,5-triphenyltetrazolium chloride (TTC), as a measure of respiration activity, were determined in hairy roots cultured under Fe-deficient and Fe-replete conditions, with or without aeration. Appreciable TTC-reducing activity was detected at the root tips, at the bases of lateral roots and in internal tissues, notably the vascular system. TTC-reducing activity increased under Fe deficiency and this increase occurred in concert with riboflavin secretion and was more apparent under aeration. Riboflavin secretion was not apparent under Fe-replete conditions. In order to examine which elements of the mitochondrial electron transport chain might be involved, the effects of the respiratory inhibitors, barbiturate, dicoumarol, malonic acid, antimycin, KCN and salicylhydroxamic acid (SHAM) were investigated. Under Fe-deficient conditions, malonic acid affected neither root growth, TTC-reducing activity nor riboflavin secretion, whereas barbiturate and SHAM inhibited only root growth and TTC-reducing activity, respectively, and the other compounds variously inhibited growth and TTC-reducing activity. Riboflavin secretion was decreased, in concert with TTC-reducing activity, by dicoumarol, antimycin and KCN, but not by SHAM. In Fe-replete roots, all inhibitors which reduced riboflavin secretion in Fe-deficient roots showed somewhat different effects: notably, antimycin and KCN did not significantly inhibit TTC-reducing activity and the inhibition by dicoumarol was much weaker in Fe-replete roots. Combined treatment with KCN and SHAM also revealed that Fe-deficient and Fe-replete roots reduced TTC in different ways. A decrease in the Fe content of mitochondria in Fe-deficient roots was confirmed. Overall, the results suggest that, under conditions of Fe deficiency in H. albus hairy roots, the alternative NAD(P)H dehydrogenases, complex III and complex IV, but not the alternative oxidase, are actively involved both in respiration and in riboflavin secretion.
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Affiliation(s)
- Ataru Higa
- Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
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Serizawa A, Kuramochi H, Nakajima G, Hayashi K, Takeichi S, Kitamura Y, Kamikozuru H, Okuyama R, Yamamoto M. Use of gene expression of specific marker genes in intraperitoneal lavage samples to predict peritoneal dissemination in gastric carcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14553] [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: 11/20/2022] Open
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