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Kobayashi H, Yamada K, Nakajima A, Hiromatsu K. Efficient gastric cancer prevention through serum pepsinogen and helicobacter antibody testing. Eur J Public Health 2016. [DOI: 10.1093/eurpub/ckw174.136] [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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Hosonaga M, Arima Y, Sato E, Yamada K, Kaise H, Kawai Y, Teraoka S, Saya H, Ishikawa T. Intratumoral heterogeneity of HER2 expression is relevant to breast cancer malignancy. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw365.12] [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: 11/12/2022] Open
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203
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Uchino J, Katakami N, Yokoyama T, Naito T, Kondo M, Yamada K, Kitajima H, Yoshimori K, Sato K, Takiguchi Y, Takayama K, Eguchi K. ONO-7643/anamorelin for the treatment of patients with non-small cell lung cancer and cachexia: results from phase 2 study with Japanese patients. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw390.02] [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: 11/15/2022] Open
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204
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Kato T, Takahashi T, Yoshioka H, Nakagawa K, Maemondo M, Yamada K, Ichiki M, Tanaka H, Seto T, Sakai H, Kasahara K, Satouchi M, Noguchi K, Shimamoto T, Nishio M. KEYNOTE-025: Phase 1b study of pembrolizumab (pembro) in Japanese patients (pts) with previously treated PD-L1+ non-small cell lung cancer (NSCLC). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw383.21] [Citation(s) in RCA: 2] [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: 11/13/2022] Open
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205
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Yamada K, Shimokawa T, Okamoto H, Tanaka H, Kubota K, Kishi K, Saitho H, Takiguchi Y, Hosomi Y, Kato T, Harada D, Masuda N, Kasai T, Nakamura Y, Minato K, Kaburagi T, Naoki K, Hikino K, Yamanaka T, Watanabe K. Randomized phase II trial of S-1 plus cisplatin or docetaxel plus cisplatin with concurrent thoracic radiotherapy for inoperable stage III non-small cell lung cancer (TORG1018): An interim report. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw382.04] [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: 11/12/2022] Open
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206
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Tran TV, Shin EJ, Ko SK, Nam Y, Chung YH, Jeong JH, Jang CG, Nah SY, Yamada K, Nabeshima T, Byun JK, Kim HC. Mountain-Cultivated Ginseng Attenuates Phencyclidine-Induced Abnormal Behaviors in Mice by Positive Modulation of Glutathione in the Prefrontal Cortex of Mice. J Med Food 2016; 19:961-969. [PMID: 27668757 DOI: 10.1089/jmf.2016.3751] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Escalating evidence indicates that ginseng treatment protects against psychotoxic behaviors and memory impairment. Although the underlying mechanism of schizophrenia remains elusive, recent investigations proposed that downregulation of glutathione (GSH) can be involved in the pathogenesis of this disorder. Since little is known about the effects of ginseng in a schizophrenia-like animal model, we selected mountain-cultivated ginseng (MG) from a variety of ginseng extracts to investigate the effect of ginseng on the psychosis induced by phencyclidine (PCP) in mice. PCP (10 mg/kg/day, s.c.) was administered for 14 consecutive days. Novel object recognition, forced swimming, and social interaction tests were performed during the withdrawal period of 7 days. In addition, behavioral sensitization to an acute challenge of PCP was evaluated. The parameters of the GSH-dependent system in the prefrontal cortex (PFC) were examined. MG (200 mg/kg, i.p./day) or antipsychotic clozapine (10 mg/kg, p.o./day) was administered for seven consecutive days after the final PCP treatment. PCP significantly produced abnormal behaviors, followed by increases in Nrf2 nuclear translocation, its DNA binding activity, and glutamate-cysteine ligase (GCL) mRNA expression in the PFC. PCP treatment significantly decreased GSH/glutathione disulfide (GSSG) ratio and glutathione peroxidase (GPx) activity. MG significantly attenuated abnormal behaviors and the decreases in GSH/GSSG ratio and GPx activity induced by PCP. MG attenuated the increases in Nrf2 activity and GCL expression caused by PCP. The protective potentials of MG were comparable to those of clozapine. MG ameliorates PCP-induced schizophrenia-like psychosis in mice through the positive modulation of the glutathione system.
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Affiliation(s)
- The-Vinh Tran
- 1 Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University , Chunchon, Republic of Korea
| | - Eun-Joo Shin
- 1 Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University , Chunchon, Republic of Korea
| | - Sung Kwon Ko
- 2 Department of Oriental Medical Food & Nutrition, Semyung University , Jecheon, Republic of Korea
| | - Yunsung Nam
- 1 Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University , Chunchon, Republic of Korea
| | - Yoon Hee Chung
- 3 Department of Anatomy, Chung-Ang University , Seoul, Republic of Korea
| | - Ji Hoon Jeong
- 4 Pharmacology, College of Medicine, Chung-Ang University , Seoul, Republic of Korea
| | - Choon-Gon Jang
- 5 Department of Pharmacology, School of Pharmacy, Sungkyunkwan University , Suwon, Republic of Korea
| | - Seung-Yeol Nah
- 6 Ginsentology Research Laboratory, Department of Physiology, College of Veterinary Medicine and Bio/Molecular Informatics Center, Konkuk University , Seoul, Republic of Korea
| | - Kiyofumi Yamada
- 7 Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - Toshitaka Nabeshima
- 8 Advanced Diagnostic System Research Laboratory, Fujita Health University Graduate School of Health Sciences , Toyoake, Japan
| | - Jae Kyung Byun
- 9 Headquarters of Forestry Support, Korea Forestry Promotion Institute , Seoul, Republic of Korea
| | - Hyoung-Chun Kim
- 1 Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University , Chunchon, Republic of Korea
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207
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Katano H, Yamada K, Mase M. The relationship betweeen calcified plaques and restenosis after carotid endarterectomy. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.878] [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: 10/21/2022]
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208
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Miyagawa Y, Yokoyama Y, Fukuzawa S, Fukata S, Ando M, Kawamura T, Yamada K, Nagino M. Risk Factors for Postoperative Delirium in Abdominal Surgery: A Proposal of a Postoperative Delirium Risk Score in Abdominal Surgery. Dig Surg 2016; 34:95-102. [PMID: 27576903 DOI: 10.1159/000449044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/10/2016] [Indexed: 12/10/2022]
Abstract
BACKGROUND/AIMS Despite the presence of several diagnosis scales for delirium, no prediction scale that is specific for postoperative delirium after abdominal surgery is available. We sought to create a novel delirium prediction system that is specific for abdominal surgery. METHODS This study included 213 consecutive patients who required management in the surgical ICU following abdominal surgery. The Neelon and Champagne (NEECHAM) Confusion score was monitored throughout the postoperative course and patients with low NEECHAM score (≤26) were diagnosed as having delirium. RESULTS Seventy-three patients (34%) were categorized in the delirium group. Multivariate analyses indicated that an age >70 years, hypertension, those undergoing hepatopancreatobiliary or upper gastrointestinal surgeries, a serum albumin level <2.5 g/dl on postoperative day (POD) 3 or 5 and a ≥6 mEq/l gap in the serum sodium level between the preoperative value and that on POD 3 were independently associated with a low NEECHAM score (≤26). When the presence of each risk was counted as 1 point, 21 patients had ≥4 points and 15 of them (71%) had low NEECHAM score. CONCLUSION The scoring system combining multiple risk factors may be useful for predicting patients with an elevated risk for postoperative delirium after abdominal surgery.
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Affiliation(s)
- Yasuhiro Miyagawa
- Department of Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Japan
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209
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Goto A, Kotani H, Miyazaki M, Yamada K, Ishikawa K, Shimoyama Y, Niwa T, Hasegawa Y, Noda Y. Genotype frequencies for polymorphisms related to chemotherapy-induced nausea and vomiting in a Japanese population. J Pharm Health Care Sci 2016; 2:16. [PMID: 27446594 PMCID: PMC4955237 DOI: 10.1186/s40780-016-0049-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 03/28/2016] [Accepted: 06/20/2016] [Indexed: 11/10/2022] Open
Abstract
Background Genotype frequencies for chemotherapy-induced nausea and vomiting (CINV)-related polymorphisms have not yet been reported for Japanese subjects. Methods We analyzed 10 genotype frequencies for following polymorphisms associated with the development of CINV: serotonin 5-HT3 receptors (HTR3); neurokinin-1 receptors (Tachykinin-1 receptors, TACR1); dopamine D2 receptors (DRD2); and catechol-O-methyltransferase (COMT). Results All polymorphisms were successfully genotyped in 200 Japanese subjects and were in Hardy-Weinberg equilibrium. Almost all genotype frequencies were similar to those in the HapMap database or in the previous reports, while frequencies for the Y192H polymorphism in TACR1 were different in Japanese subjects from those in a previous report. Conclusions The present study revealed genotype frequencies for polymorphisms, which were related to the appearance of CINV in Japanese subjects. Individual therapy based on genotype variations for each race is needed to allow cancer patients to undergo chemotherapy more safely and to understand etiology of CINV.
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Affiliation(s)
- Aya Goto
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku Nagoya, 468-8503 Japan
| | - Haruka Kotani
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku Nagoya, 468-8503 Japan
| | - Masayuki Miyazaki
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku Nagoya, 468-8503 Japan ; Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Showa-ku Nagoya, 466-8550 Japan
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Showa-ku Nagoya, 466-8550 Japan
| | - Kazuhiro Ishikawa
- Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Showa-ku Nagoya, 466-8550 Japan
| | - Yasuhiko Shimoyama
- Aichi Health Promotion Foundation, 1-18-4, Shimizu, Kita-ku, Nagoya, 462-0844 Japan
| | - Toshimitsu Niwa
- Faculty of Health and Nutrition, Shubun University, 6 Nikko-cho, Ichinomiya, Aichi 491-0938 Japan
| | - Yoshinori Hasegawa
- Department of Respiratory Medicine, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Showa-ku Nagoya, 466-8550 Japan
| | - Yukihiro Noda
- Division of Clinical Sciences and Neuropsychopharmacology, Faculty and Graduate School of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku Nagoya, 468-8503 Japan ; Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, 65 Tsurumai-cho, Showa-ku Nagoya, 466-8550 Japan
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Kinoshita A, Yamada K, Mushiroi T, Hayakawa T. Cholinergic deafferentation prevents delayed neuronal death of the hippocampal CA1 pyramidal neurons after transient forebrain ischaemia. Neurol Res 2016; 14:340-4. [PMID: 1360631 DOI: 10.1080/01616412.1992.11740081] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The relation between CA1 neurons, fimbria-fornix and cholinergic neurons of the basal forebrain was examined with the aid of Acetylcholine esterase (AChE) staining, Woelcke's staining and immunohistochemistry of Choline-acetyl transferase (ChAT). The transected side of the hippocampus was poorly stained by AChE two weeks after the transection, when the ipsilateral medial septum ChAT-positive neurons were reduced, but showed good recovery with AChE six weeks later. Nerve growth factor (NGF) was added at a dose of 10 micrograms/100 microliters immediately after the aspiration, and after that once per week with cisternal puncture. As a result, ipsilateral medial septum ChAT-positive neurons were preserved, but cross innervation with relation to hypertrophy of the cholinergic neurons was not detectable even six weeks after the transection. Furthermore, delayed CA1 neuronal death on the transected side of the hippocampus following occlusion of four vessels for 30 minutes was not detectable two weeks after the operation, although neuronal density was reduced after six weeks. The density of neurons on the transected side of the hippocampus in the CA1 subfield with treated NGF had not decreased significantly six weeks later. Therefore, we suspect that the input from cholinergic fibres must be transported to the hippocampal pyramidal neurons responding to NGF, and it was confirmed that cholinergic deafferentation prevents the delayed neuronal death of CA1 pyramidal neurons during transient ischaemia.
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Affiliation(s)
- A Kinoshita
- Department of Neurosurgery, Osaka University Medical School, Japan
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Yamada K, Kinoshita A, Kohmura E, Kataoka K, Sakaguchi T, Taneda M, Kuroda R, Hayakawa T. Detection and partial purification of ischaemia-related neurotrophic activity in the periinfarcted brain tissue. Neurol Res 2016; 14:267-72. [PMID: 1355283 DOI: 10.1080/01616412.1992.11740068] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In the rat model of middle cerebral artery (MCA) occlusion, axons originating from the ipsilateral cortical and thalamic neurons are injured by ischaemia. The cortical neurons survive thereafter without retrograde degeneration, but thalamic neurons slowly die because of retrograde degeneration. The fate of these two neurons is remarkably different and may be related to neurotrophic activity induced by ischaemia. We detected ischaemia-related neurotrophic activity, and partially purified the factor. Tissue samples were obtained from the cortex adjacent to the infarction and contralateral corresponding site at 4, 8 and 12 days after occlusion of the MCA. They were homogenated with a culture medium and ultracentrifuged. The supernatant was obtained and used for neurotrophic assay. Foetal cortical neurons were obtained from 17 days rat embryo and cultured. Neurotrophic activity was assayed by applying tissue extract to the culture medium. Application of periischaemic cortical extract obtained at 8 and 12 days after ischaemia improved neuronal survival by 50% and 200% as compared to contralateral cortical extract, respectively. The activity was not detectable at 4 days after ischaemia. The neurotrophic activity disappeared by heating the extract at 90 degrees C for 10 min. We fractionated the extract by saturated ammonium sulphate precipitation, followed by gel-filtered with Superose 12 column. The neurotrophic activity was detected in the precipitation of 30 to 60% saturation fraction of ammonium sulphate. With gel-filtration we separated neurotrophic activity in several fractions, which included marker proteins of 8, 22 and 30 kilodaltons. The activities were only detected in the lesioned side but not in the contralateral side.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- K Yamada
- Department of Neurosurgery, Osaka University Medical School, Japan
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Matsura T, Yamada K, Kawasaki T. Protective effects of coenzyme Q10and α-tocopherol against free radical-mediated liver cell injury. Redox Rep 2016; 1:343-7. [DOI: 10.1080/13510002.1995.11747009] [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: 10/21/2022] Open
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Itoh N, Enomoto A, Nagai T, Takahashi M, Yamada K. Molecular mechanism linking BDNF/TrkB signaling with the NMDA receptor in memory: the role of Girdin in the CNS. Rev Neurosci 2016; 27:481-90. [DOI: 10.1515/revneuro-2015-0072] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 01/14/2016] [Indexed: 12/21/2022]
Abstract
AbstractIt is well known that synaptic plasticity is the cellular mechanism underlying learning and memory. Activity-dependent synaptic changes in electrical properties and morphology, including synaptogenesis, lead to alterations of synaptic strength, which is associated with long-term potentiation (LTP). Brain-derived neurotrophic factor (BDNF)/tropomyosin-related kinase B (TrkB) signaling is involved in learning and memory formation by regulating synaptic plasticity. The phosphatidylinositol 3-kinase (PI3-K)/Akt pathway is one of the key signaling cascades downstream BDNF/TrkB and is believed to modulate N-methyl-d-aspartate (NMDA) receptor-mediated synaptic plasticity. However, the molecular mechanism underlying the connection between these two key players in synaptic plasticity remains largely unknown. Girders of actin filament (Girdin), an Akt substrate that directly binds to actin filaments, has been shown to play a role in neuronal migration and neuronal development. Recently, we identified Girdin as a key molecule involved in regulating long-term memory. It was demonstrated that phosphorylation of Girdin by Akt contributed to the maintenance of LTP by linking the BDNF/TrkB signaling pathway with NMDA receptor activity. These findings indicate that Girdin plays a pivotal role in a variety of processes in the CNS. Here, we review recent advances in our understanding about the roles of Girdin in the CNS and focus particularly on neuronal migration and memory.
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Affiliation(s)
| | | | - Taku Nagai
- 1Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560, Japan
| | - Masahide Takahashi
- 2Department of Pathology, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa, Nagoya, Aichi 466-8550, Japan
| | - Kiyofumi Yamada
- 1Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560, Japan
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214
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Tokuda K, Shindo S, Yamada K, Shirakawa M, Uchida K, Horimatsu T, Ishihara M, Yoshimura S. Acute Embolic Cerebral Infarction and Coronary Artery Embolism in a Patient with Atrial Fibrillation Caused by Similar Thrombi. J Stroke Cerebrovasc Dis 2016; 25:1797-1799. [DOI: 10.1016/j.jstrokecerebrovasdis.2016.01.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 01/14/2016] [Accepted: 01/31/2016] [Indexed: 01/19/2023] Open
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Miura K, Sahara H, Waki S, Kawai A, Sekijima M, Kobayashi T, Zhang Z, Wakai T, Shimizu A, Yamada K. Development of the Intestinal Transplantation Model With Major Histocompatibility Complex Inbred CLAWN Miniature Swine. Transplant Proc 2016; 48:1315-9. [DOI: 10.1016/j.transproceed.2016.01.023] [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] [Received: 01/21/2016] [Accepted: 01/28/2016] [Indexed: 12/12/2022]
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Harada K, Mine S, Yamada K, Shigaki H, Oya S, Baba H, Watanabe M. Long-term outcome of esophagectomy for primary malignant melanoma of the esophagus: a single-institute retrospective analysis. Dis Esophagus 2016; 29:314-9. [PMID: 25708974 DOI: 10.1111/dote.12331] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Primary malignant melanoma of the esophagus (PMME) is a highly malignant tumor with a poor prognosis. Because PMME is an extremely rare disease, therapeutic strategies against the tumor have yet to be established, and the efficacy of esophagectomy remains unclear. The objective of this study was to evaluate the post-esophagectomy survival of PMME patients. Ten patients who underwent esophagectomy for PMME between March 2005 and April 2013 at the Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan, were identified from the institutional database. We retrospectively retrieved clinical information and data on the long-term outcomes from the patients' records. Survival rates after esophagectomy were calculated by the Kaplan-Meier method, and the hazard ratios of mortality were determined using the Cox's model. A follow-up study of the 10 patients revealed 7 cancer recurrences and 5 deaths. Median survival time was 34.5 months, and 5 of 10 patients survived longer than 2 years. The 1-year disease-free survival rate was 40%, and the 1- and 3-year overall survival rates were 70% and 60%, respectively. Importantly, all three of the non-relapsing patients were histologically confirmed as free of lymph node involvement. The four patients with lymph node metastasis relapsed within 1 year. The disease-free survival was significantly shorter in patients with lymph node involvement than in those without lymph node involvement (univariate hazard ratio = 13.3, 95% confidence interval 1.85-266.4; P = 0.009). In conclusion, esophagectomy might benefit PMME patients with no lymph node metastasis. Further large-scale cohort studies are needed to establish the treatment strategy for PMME.
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Affiliation(s)
- K Harada
- Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan.,Department of Gastroenterological Surgery, Graduate School of Medical Science, Kumamoto University, Kumamoto, Japan
| | - S Mine
- Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan
| | - K Yamada
- Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan
| | - H Shigaki
- Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan
| | - S Oya
- Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kumamoto University, Kumamoto, Japan
| | - M Watanabe
- Department of Gastroenterological Surgery, Cancer Institute Hospital, Tokyo, Japan
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217
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Sahara H, Sekijima M, Iwanaga T, Ichinari Y, Shimizu A, Yamada K. MHC-Inbred CLAWN Miniature Swine as Preclinical Large Animal Model for Lung Transplantation. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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218
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Yamada K, Yamamoto M, Horikawa M, Shinmoto H, Kaji T. Balloon-occluded retrograde transvenous obliteration for duodenal varices. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.708] [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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219
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Prologo J, Gilliland C, Yamada K, Edalat F, Bittman R, Harkey P, Brewster L, Corn D. Percutaneous image-guided cryoablation for the treatment of phantom limb pain in amputees: a pilot study. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.474] [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: 11/16/2022] Open
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220
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Nagai T, Nakamuta S, Kuroda K, Nakauchi S, Nishioka T, Takano T, Zhang X, Tsuboi D, Funahashi Y, Nakano T, Yoshimoto J, Kobayashi K, Uchigashima M, Watanabe M, Miura M, Nishi A, Kobayashi K, Yamada K, Amano M, Kaibuchi K. Phosphoproteomics of the Dopamine Pathway Enables Discovery of Rap1 Activation as a Reward Signal In Vivo. Neuron 2016; 89:550-65. [DOI: 10.1016/j.neuron.2015.12.019] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 10/17/2015] [Accepted: 12/10/2015] [Indexed: 12/21/2022]
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221
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Kameshima S, Yamada K, Morita T, Okada M, Yamawaki H. Visceral adipose tissue-derived serine protease inhibitor augments acetylcholine-induced relaxation via the inhibition of acetylcholine esterase activity in rat isolated mesenteric artery. Acta Physiol (Oxf) 2016; 216:203-10. [PMID: 26264600 DOI: 10.1111/apha.12563] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 08/06/2015] [Indexed: 01/23/2023]
Abstract
AIM Visceral adipose tissue-derived serine protease inhibitor (vaspin) is an adipocytokine with insulin-sensitizing activity originally identified in visceral adipose tissues of obesity-related type II diabetic rats. We previously showed that vaspin inhibits vascular cell migration and apoptosis as well as inflammatory responses, which are crucial for the development of hypertension. However, little is known about the effects of vaspin on vascular reactivity. The aim of this study was thus to explore the effects of vaspin on contraction and relaxation of isolated blood vessel. METHODS After mesenteric arteries were isolated from male Wistar rats, the effects of pretreatment with vaspin (3 ng mL(-1) , 30 min) on concentration-contraction and concentration-relaxation relationships for each agent were examined. The effects of vaspin on acetylcholine (ACh)-induced phosphorylation of endothelial nitric oxide (NO) synthase (eNOS) and ACh esterase (AChE) activity were also examined using Western blotting and colorimetric method respectively. RESULTS Vaspin did not affect noradrenaline- or 5-hydroxytryptamine-induced contraction. In contrast, vaspin augmented ACh- but not histamine-, A23187- or carbachol-induced NO-mediated relaxation. Vaspin significantly increased ACh-induced eNOS phosphorylation and inhibited AChE activity. CONCLUSION We for the first time demonstrate that vaspin augments the ACh-induced NO-mediated endothelium-dependent relaxation via the inhibition of AChE activity.
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Affiliation(s)
- S. Kameshima
- Laboratory of Veterinary Pharmacology; School of Veterinary Medicine; Kitasato University; Towada Aomori Japan
| | - K. Yamada
- Laboratory of Veterinary Pharmacology; School of Veterinary Medicine; Kitasato University; Towada Aomori Japan
| | - T. Morita
- Laboratory of Veterinary Pharmacology; School of Veterinary Medicine; Kitasato University; Towada Aomori Japan
| | - M. Okada
- Laboratory of Veterinary Pharmacology; School of Veterinary Medicine; Kitasato University; Towada Aomori Japan
| | - H. Yamawaki
- Laboratory of Veterinary Pharmacology; School of Veterinary Medicine; Kitasato University; Towada Aomori Japan
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Yamada K, Kawasaki M, Yoshimura S, Nakahara S, Sato Y. Abstract WP122: Asymptomatic Moderate Carotid Artery Stenosis With Intraplaque Hemorrhage ∼ Progression of Degree of Stenosis and New Ischemic Stroke. Stroke 2016. [DOI: 10.1161/str.47.suppl_1.wp122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Carotid artery stenosis is one of the major causes of ischemic stroke. Carotid intraplaque hemorrhage (IPH) plays a critical role in the progression of carotid atherosclerotic disease. Previous studies showed that IPH was associated with high intensity signal (HIS) on maximum intensity projection (MIP) images from routine three dimensional magnetic resonance imaging (3D-TOF MRA). The aim of this study was to evaluate the relationships among HIS, new ipsilateral ischemic stroke and a progression rate in carotid plaques with moderate stenosis.
Materials and Methods:
We included 45 carotid plaques with moderate stenosis (50% to 69%) in 45 patients who could be followed more than 12 months. Carotid IPH was defined as the presence of HIS in carotid plaque on MIP image from routine 3DTOF MRA using the criteria previously we published. We analyzed the relation between the presence of HIS in the plaques and new ischemic strokes and annual progression rate of carotid stenosis.
Results:
HIS in carotid plaque was present in 21 (47%) carotid arteries. Over a follow-up period of 24 ± 9 months, six ischemic strokes occurred ipsilateral to the index carotid artery. New ipsilateral ischemic stroke occurred more frequently in HIS positive group (6 of 21, 29%) than HIS negative group (0 of 24, 0%) (p=0.017). Annual progression rate of carotid stenosis is significantly higher in HIS positive group (+3.35%/year) than HIS negative group (-0.02%/year) (p= 0.0026). In multivariate regression analysis, HIS positive was an independent predictor for annual progression rate of carotid stenosis (p=0.003).
Conclusions:
HIS in carotid plaques on 3DTOF-MRA MIP images are associated with new ischemic stroke and higher annual progression rate of stenosis. Evaluation of HIS in asymptomatic moderate carotid stenosis can potentially provide risk stratification of new ipsilateral ischemic strokes.
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Azuma M, Hirai T, Yamada K, Yamashita S, Ando Y, Tateishi M, Iryo Y, Yoneda T, Kitajima M, Wang Y, Yamashita Y. Lateral Asymmetry and Spatial Difference of Iron Deposition in the Substantia Nigra of Patients with Parkinson Disease Measured with Quantitative Susceptibility Mapping. AJNR Am J Neuroradiol 2016; 37:782-8. [PMID: 26822728 DOI: 10.3174/ajnr.a4645] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/03/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND PURPOSE Quantitative susceptibility mapping is useful for assessing iron deposition in the substantia nigra of patients with Parkinson disease. We aimed to determine whether quantitative susceptibility mapping is useful for assessing the lateral asymmetry and spatial difference in iron deposits in the substantia nigra of patients with Parkinson disease. MATERIALS AND METHODS Our study population comprised 24 patients with Parkinson disease and 24 age- and sex-matched healthy controls. They underwent 3T MR imaging by using a 3D multiecho gradient-echo sequence. On reconstructed quantitative susceptibility mapping, we measured the susceptibility values in the anterior, middle, and posterior parts of the substantia nigra, the whole substantia nigra, and other deep gray matter structures in both hemibrains. To identify the more and less affected hemibrains in patients with Parkinson disease, we assessed the severity of movement symptoms for each hemibrain by using the Unified Parkinson's Disease Rating Scale. RESULTS In the posterior substantia nigra of patients with Parkinson disease, the mean susceptibility value was significantly higher in the more than the less affected hemibrain substantia nigra (P < .05). This value was significantly higher in both the more and less affected hemibrains of patients with Parkinson disease than in controls (P < .05). Asymmetry of the mean susceptibility values was significantly greater for patients than controls (P < .05). Receiver operating characteristic analysis showed that quantitative susceptibility mapping of the posterior substantia nigra in the more affected hemibrain provided the highest power for discriminating patients with Parkinson disease from the controls. CONCLUSIONS Quantitative susceptibility mapping is useful for assessing the lateral asymmetry and spatial difference of iron deposition in the substantia nigra of patients with Parkinson disease.
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Affiliation(s)
- M Azuma
- From the Departments of Diagnostic Radiology (M.A., M.T., Y.I., M.K., Y.Y.)
| | - T Hirai
- Department of Radiology (T.H.), Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | | | - S Yamashita
- Neurology (S.Y., Y.A.), Graduate School of Medical Sciences
| | - Y Ando
- Neurology (S.Y., Y.A.), Graduate School of Medical Sciences
| | - M Tateishi
- From the Departments of Diagnostic Radiology (M.A., M.T., Y.I., M.K., Y.Y.)
| | - Y Iryo
- From the Departments of Diagnostic Radiology (M.A., M.T., Y.I., M.K., Y.Y.)
| | - T Yoneda
- Department of Medical Physics in Advanced Biomedical Sciences (T.Y.), Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - M Kitajima
- From the Departments of Diagnostic Radiology (M.A., M.T., Y.I., M.K., Y.Y.)
| | - Y Wang
- Department of Radiology (Y.W.), Weill Cornell Medical College, New York, New York
| | - Y Yamashita
- From the Departments of Diagnostic Radiology (M.A., M.T., Y.I., M.K., Y.Y.)
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Niwa Y, Minami Y, Abe A, Hayakawa F, Yamada K, Naoe T. Wnt signaling is associated with cell survival in the interaction between acute myeloid leukemia cells and stromal cells. Leuk Lymphoma 2016; 57:2192-4. [PMID: 26727242 DOI: 10.3109/10428194.2015.1124995] [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]
Affiliation(s)
- Yosuke Niwa
- a Department of Hematology and Oncology , Nagoya University Graduate School of Medicine , Nagoya , Japan ;,b Department of Pharmacy , Nagoya University Graduate School of Medicine , Nagoya , Japan
| | - Yosuke Minami
- c Department of Transfusion Medicine and Cell Therapy , Kobe University Hospital , Kobe , Japan
| | - Akihiro Abe
- d Department of Hematology , Fujita Health University , Toyoake , Japan
| | - Fumihiko Hayakawa
- a Department of Hematology and Oncology , Nagoya University Graduate School of Medicine , Nagoya , Japan
| | - Kiyofumi Yamada
- b Department of Pharmacy , Nagoya University Graduate School of Medicine , Nagoya , Japan
| | - Tomoki Naoe
- a Department of Hematology and Oncology , Nagoya University Graduate School of Medicine , Nagoya , Japan ;,e National Hospital Organization Nagoya Medical Center , Nagoya , Japan
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Villani V, Yamada K, Scalea JR, Gillon BC, Arn JS, Sekijima M, Tasaki M, Cormack TA, Moran SG, Torabi R, Shimizu A, Sachs DH. Adoptive Transfer of Renal Allograft Tolerance in a Large Animal Model. Am J Transplant 2016; 16:317-24. [PMID: 26260215 PMCID: PMC4718904 DOI: 10.1111/ajt.13424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/19/2015] [Accepted: 06/11/2015] [Indexed: 01/25/2023]
Abstract
Our recent studies in an inbred swine model demonstrated that both peripheral and intra-graft regulatory cells were required for the adoptive transfer of tolerance to a second, naïve donor-matched kidney. Here, we have asked whether both peripheral and intra-graft regulatory elements are required for adoptive transfer of tolerance when only a long-term tolerant (LTT) kidney is transplanted. Nine highly-inbred swine underwent a tolerance-inducing regimen to prepare LTT kidney grafts which were then transplanted to histocompatible recipients, with or without the peripheral cell populations required for adoptive transfer of tolerance to a naïve kidney. In contrast to our previous studies, tolerance of the LTT kidney transplants alone was achieved without transfer of additional peripheral cells and without strategies to increase the number/potency of regulatory T cells in the donor. This tolerance was systemic, since most subsequent, donor-matched challenge kidney grafts were accepted. These results confirm the presence of a potent tolerance-inducing and/or tolerance-maintaining cell population within LTT renal allografts. They suggest further that additional peripheral tolerance mechanisms, required for adoptive transfer of tolerance to a naïve donor-matched kidney, depend on peripheral cells that, if not transferred with the LTT kidney, require time to develop in the adoptive host.
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Affiliation(s)
- V Villani
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - K Yamada
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - J R Scalea
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - B C Gillon
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - J S Arn
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - M Sekijima
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - M Tasaki
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - T A Cormack
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - S G Moran
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - R Torabi
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - A Shimizu
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - D H Sachs
- Transplantation Biology Research Center (TBRC) Laboratories, Center for Transplantation Sciences (CTS), Massachusetts General Hospital, Harvard Medical School, Boston, MA
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Aoyama Y, Toriumi K, Mouri A, Hattori T, Ueda E, Shimato A, Sakakibara N, Soh Y, Mamiya T, Nagai T, Kim HC, Hiramatsu M, Nabeshima T, Yamada K. Prenatal Nicotine Exposure Impairs the Proliferation of Neuronal Progenitors, Leading to Fewer Glutamatergic Neurons in the Medial Prefrontal Cortex. Neuropsychopharmacology 2016; 41:578-89. [PMID: 26105135 PMCID: PMC5130133 DOI: 10.1038/npp.2015.186] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/22/2015] [Accepted: 06/13/2015] [Indexed: 12/20/2022]
Abstract
Cigarette smoking during pregnancy is associated with various disabilities in the offspring such as attention deficit/hyperactivity disorder, learning disabilities, and persistent anxiety. We have reported that nicotine exposure in female mice during pregnancy, in particular from embryonic day 14 (E14) to postnatal day 0 (P0), induces long-lasting behavioral deficits in offspring. However, the mechanism by which prenatal nicotine exposure (PNE) affects neurodevelopment, resulting in behavioral deficits, has remained unclear. Here, we report that PNE disrupted the proliferation of neuronal progenitors, leading to a decrease in the progenitor pool in the ventricular and subventricular zones. In addition, using a cumulative 5-bromo-2'-deoxyuridine labeling assay, we evaluated the rate of cell cycle progression causing the impairment of neuronal progenitor proliferation, and uncovered anomalous cell cycle kinetics in mice with PNE. Accordingly, the density of glutamatergic neurons in the medial prefrontal cortex (medial PFC) was reduced, implying glutamatergic dysregulation. Mice with PNE exhibited behavioral impairments in attentional function and behavioral flexibility in adulthood, and the deficits were ameliorated by microinjection of D-cycloserine into the PFC. Collectively, our findings suggest that PNE affects the proliferation and maturation of progenitor cells to glutamatergic neuron during neurodevelopment in the medial PFC, which may be associated with cognitive deficits in the offspring.
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Affiliation(s)
- Yuki Aoyama
- Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, Nagoya, Japan,Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Kazuya Toriumi
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Akihiro Mouri
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan,Japanese Drug Organization of Appropriate Use and Research, Nagoya, Japan
| | - Tomoya Hattori
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Eriko Ueda
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Akane Shimato
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Nami Sakakibara
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Yuka Soh
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Takayoshi Mamiya
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan,Japanese Drug Organization of Appropriate Use and Research, Nagoya, Japan
| | - Taku Nagai
- Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Hyoung-Chun Kim
- Department of Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon, South Korea
| | - Masayuki Hiramatsu
- Department of Chemical Pharmacology, Faculty of Pharmacy, Meijo University, Nagoya, Japan,Japanese Drug Organization of Appropriate Use and Research, Nagoya, Japan
| | - Toshitaka Nabeshima
- Japanese Drug Organization of Appropriate Use and Research, Nagoya, Japan,Nabeshima Laboratory, Faculty of Pharmacy, Meijo University, Nagoya, Japan,Nabeshima Laboratory, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tenpaku-ku, Nagoya 468-8503, Japan, Tel: +81 52 839 2756, Fax: +81 52 839 2756, E-mail:
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, Nagoya, Japan,Japanese Drug Organization of Appropriate Use and Research, Nagoya, Japan,Department of Neuropsychopharmacology and Hospital Pharmacy, Graduate School of Medicine, Nagoya University, 65 Tsuruma-cho, Showa-ku, Nagoya 466-8550, Japan, Tel: +81 52 744 2674, Fax: +81 52 744 2979, E-mail:
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Sakaguchi H, Muramatsu H, Okuno Y, Makishima H, Xu Y, Furukawa-Hibi Y, Wang X, Narita A, Yoshida K, Shiraishi Y, Doisaki S, Yoshida N, Hama A, Takahashi Y, Yamada K, Miyano S, Ogawa S, Maciejewski JP, Kojima S. Aberrant DNA Methylation Is Associated with a Poor Outcome in Juvenile Myelomonocytic Leukemia. PLoS One 2015; 10:e0145394. [PMID: 26720758 PMCID: PMC4697810 DOI: 10.1371/journal.pone.0145394] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/03/2015] [Indexed: 12/18/2022] Open
Abstract
Juvenile myelomonocytic leukemia (JMML), an overlap of myelodysplastic / myeloproliferative neoplasm, is an intractable pediatric myeloid neoplasm. Epigenetic regulation of transcription, particularly by CpG methylation, plays an important role in tumor progression, mainly by repressing tumor-suppressor genes. To clarify the clinical importance of aberrant DNA methylation, we studied the hypermethylation status of 16 target genes in the genomes of 92 patients with JMML by bisulfite conversion and the pryosequencing technique. Among 16 candidate genes, BMP4, CALCA, CDKN2A, and RARB exhibited significant hypermethylation in 72% (67/92) of patients. Based on the number of hypermethylated genes, patients were stratified into three cohorts based on an aberrant methylation score (AMS) of 0, 1–2, or 3–4. In the AMS 0 cohort, the 5-year overall survival (OS) and transplantation-free survival (TFS) were good (69% and 76%, respectively). In the AMS 1–2 cohort, the 5-year OS was comparable to that in the AMS 0 cohort (68%), whereas TFS was poor (6%). In the AMS 3–4 cohort, 5-year OS and TFS were markedly low (8% and 0%, respectively). Epigenetic analysis provides helpful information for clinicians to select treatment strategies for patients with JMML. For patients with AMS 3–4 in whom hematopoietic stem cell transplantation does not improve the prognosis, alternative therapies, including DNA methyltransferase inhibitors and new molecular-targeting agents, should be established as treatment options.
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Affiliation(s)
- Hirotoshi Sakaguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Nagoya First Hospital, Nagoya, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Okuno
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Makishima
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yinyan Xu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoko Furukawa-Hibi
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Xinan Wang
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Atsushi Narita
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenichi Yoshida
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yuichi Shiraishi
- Laboratory of DNA information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Sayoko Doisaki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Nao Yoshida
- Department of Hematology and Oncology, Children’s Medical Center, Japanese Red Cross Nagoya First Hospital, Nagoya, Japan
| | - Asahito Hama
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Satoru Miyano
- Laboratory of DNA information Analysis, Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Jaroslaw P. Maciejewski
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
- * E-mail:
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229
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Hori K, Nagai T, Shan W, Sakamoto A, Abe M, Yamazaki M, Sakimura K, Yamada K, Hoshino M. Heterozygous Disruption of Autism susceptibility candidate 2 Causes Impaired Emotional Control and Cognitive Memory. PLoS One 2015; 10:e0145979. [PMID: 26717414 PMCID: PMC4699902 DOI: 10.1371/journal.pone.0145979] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/12/2015] [Indexed: 11/19/2022] Open
Abstract
Mutations in the Autism susceptibility candidate 2 gene (AUTS2) have been associated with a broad range of psychiatric illnesses including autism spectrum disorders, intellectual disability and schizophrenia. We previously demonstrated that the cytoplasmic AUTS2 acts as an upstream factor for the Rho family small GTPase Rac1 and Cdc42 that regulate the cytoskeletal rearrangements in neural cells. Moreover, genetic ablation of the Auts2 gene in mice has resulted in defects in neuronal migration and neuritogenesis in the developing cerebral cortex caused by inactivation of Rac1-signaling pathway, suggesting that AUTS2 is required for neural development. In this study, we conducted a battery of behavioral analyses on Auts2 heterozygous mutant mice to examine the involvement of Auts2 in adult cognitive brain functions. Auts2-deficient mice displayed a decrease in exploratory behavior as well as lower anxiety-like behaviors in the absence of any motor dysfunction. Furthermore, the capability for novel object recognition and cued associative memory were impaired in Auts2 mutant mice. Social behavior and sensory motor gating functions were, however, normal in the mutant mice as assessed by the three-chamber test and prepulse inhibition test, respectively. Together, our findings indicate that AUTS2 is critical for the acquisition of neurocognitive function.
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Affiliation(s)
- Kei Hori
- Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, NCNP, Tokyo, Japan
| | - Taku Nagai
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Wei Shan
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Asami Sakamoto
- Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, NCNP, Tokyo, Japan
| | - Manabu Abe
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Maya Yamazaki
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kenji Sakimura
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Mikio Hoshino
- Department of Biochemistry and Cellular Biology, National Institute of Neuroscience, NCNP, Tokyo, Japan
- * E-mail:
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230
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Hosonaga M, Sato E, Yamada K, Kaise H, Kimura F, Kawai Y, Ueda A, Teraoka S, Okazaki M, Ishikawa T. 69P Intratumoral heterogeneity of HER2 expression is associated with malignant biological behavior. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv519.18] [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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231
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Matsuo N, Tokito T, Azuma K, Ishii H, Yamada K, Hoshino T. 427PD Prognostic significance of PD-L1 expression combined with CD8+ TIL density in stage III non-small cell lung cancer patients receiving concurrent chemoradiotherapy. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.11] [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: 11/14/2022] Open
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232
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Yamada K, Kaise H, Hosonaga M, Kimura F, Kawai Y, Ueda A, Teraoka S, Okazaki M, Ishikawa T. 402P Efficacy of duloxetine for paclitaxel-induced and pregabalin-resistant peripheral neuropathy in Japanese breast cancer patients. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv531.35] [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: 11/13/2022] Open
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233
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Ibi D, Yamada K. Therapeutic Targets for Neurodevelopmental Disorders Emerging from Animal Models with Perinatal Immune Activation. Int J Mol Sci 2015; 16:28218-29. [PMID: 26633355 PMCID: PMC4691039 DOI: 10.3390/ijms161226092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 11/17/2015] [Accepted: 11/20/2015] [Indexed: 01/02/2023] Open
Abstract
Increasing epidemiological evidence indicates that perinatal infection with various viral pathogens enhances the risk for several psychiatric disorders. The pathophysiological significance of astrocyte interactions with neurons and/or gut microbiomes has been reported in neurodevelopmental disorders triggered by pre- and postnatal immune insults. Recent studies with the maternal immune activation or neonatal polyriboinosinic polyribocytidylic acid models of neurodevelopmental disorders have identified various candidate molecules that could be responsible for brain dysfunction. Here, we review the functions of several candidate molecules in neurodevelopment and brain function and discuss their potential as therapeutic targets for psychiatric disorders.
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Affiliation(s)
- Daisuke Ibi
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Meijo University, 150 Yagotoyama, Tenpaku-ku, Nagoya 468-8503, Japan.
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan.
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan.
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Yamada K, Kawasaki M, Yoshimura S, Shirakawa M, Uchida K, Shindo S, Nishida S, Iwamoto Y, Nakahara S, Sato Y. High-Intensity Signal in Carotid Plaque on Routine 3D-TOF-MRA Is a Risk Factor of Ischemic Stroke. Cerebrovasc Dis 2015; 41:13-8. [DOI: 10.1159/000441094] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 09/15/2015] [Indexed: 11/19/2022] Open
Abstract
Background: Carotid atherosclerotic disease is recognized as an important risk factor for brain ischemic events. However, high-grade stenosis does not always cause ischemic strokes, whereas moderate-grade stenosis may often cause ischemic strokes. It has been reported that there is an association between carotid intraplaque hemorrhage (IPH) and new cerebral ischemic events. The purpose of this study was to elucidate the relationship between high-intensity signals (HIS) on maximum intensity projection (MIP) images from routine 3-dimensional time-of-flight magnetic resonance angiography (3D-TOF-MRA) and prior ischemic strokes in the patients with moderate carotid stenosis. Materials and Methods: Sixty-one patients with moderate carotid artery stenosis (50-69% stenosis based on North American Symptomatic Carotid Endarterectomy Trial criteria) were included. Carotid IPH was defined as the presence of HIS in carotid plaques on MIP images detected by 3D-TOF-MRA using criteria we previously reported. We analyzed the relationship between the presence of HIS in plaques and prior ischemic strokes defined as ischemic lesions on diffusion-weighted brain images. Results: HIS in carotid plaques were present in 27 (44%) of 61 patients. Prior ipsilateral ischemic strokes occurred more frequently in the HIS-positive group than the HIS-negative group (67 vs. 9%, p < 0.001). Furthermore, there were more smokers in the group with ischemic stroke than without it (62 vs. 25%, p = 0.005). In multivariate logistic regression analysis, HIS in carotid plaque (OR 23.4, 95% CI 4.62-118.3, p < 0.001) and smoking (OR 5.44, 95% CI 1.20-24.6, p = 0.028) were independent determinants of prior ischemic strokes after adjustment for age. Conclusions: HIS in carotid plaques on 3D-TOF-MRA MIP images are independent determinants of prior ischemic strokes in patients with moderate carotid artery stenosis, and they can potentially provide a reliable risk stratification of patients with moderate carotid artery stenosis.
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Shioyama Y, Nagata Y, Komiyama T, Takayama K, Shibamoto Y, Ueki N, Yamada K, Kozuka T, Kimura T, Matsuo Y. Multi-institutional Retrospective Study of Stereotactic Body Radiation Therapy for Stage I Small Cell Lung Cancer: Japan Radiation Oncology Study Group (JROSG). Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.243] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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236
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Ishihara T, Yamada K, Harada A, Isogai K, Miyawaki D, Yoshida K, Ejima Y, Sasaki R. Hypofractionated Stereotactic Radiation Therapy Compared With Stereotactic Radiosurgery for Brain Metastases From Lung Cancer: Experience at a Single-Institution. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.723] [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: 11/15/2022]
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237
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Imai H, Kamei H, Onishi Y, Yamada K, Ishizu Y, Ishigami M, Goto H, Ogura Y. Successful Living-Donor Liver Transplantation for Cholestatic Liver Failure Induced by Allopurinol: Case Report. Transplant Proc 2015; 47:2778-81. [DOI: 10.1016/j.transproceed.2015.09.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 09/24/2015] [Indexed: 10/22/2022]
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238
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Uchida K, Yoshimura S, Shirakawa M, Shindo S, Egashira Y, Iwama T, Yamada K. Experience of Staged Angioplasty to Avoid Hyperperfusion Syndrome for Carotid Artery Stenosis. Neurol Med Chir (Tokyo) 2015; 55:824-9. [PMID: 26447098 PMCID: PMC4663020 DOI: 10.2176/nmc.oa.2015-0102] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Hyperperfusion syndrome (HPS) after carotid artery stenting (CAS) may cause hemorrhagic or ischemic events leading to serious sequelae. We previously reported the staged angioplasty (SAP) to prevent HPS. In the present study, we analyzed our treatment results of SAP to know its effectiveness and problems. The study included 43 patients scheduled for SAP in whom preoperative single photon emission computed tomography (SPECT) showed severely impaired cerebral blood flow (CBF). The analyzed subjects were 38 males and 4 females, mean age was 73 ± 8.5 years old. SAP was indicated for the patients whose CBF ratio in the affected/unaffected hemisphere (asymmetry index) was below 0.8, and cerebrovascular reactivity measured by acetazolamide challenge was below 10%. First, percutaneous transluminal angioplasty (PTA) was performed. If PTA was successful, CAS was performed 2 weeks later. If PTA was not successful due to inadequate dilatation or extensive dissection, a stent was placed. SPECT was performed immediately after PTA and CAS to confirm the presence or absence of hyperperfusion phenomenon (HPP) indicating radiologic hyperperfusion. In 39 of 43 patients (91%), SAP was successfully performed and HPP was not observed. On the other hand, in the other four patients (9%), immediate stent placement was added due to inadequate dilatations in three patients and vascular dissection in one. Among 43 candidates for SAP, 41 patients (95.4%) had favorable course, but one hemorrhagic and one ischemic complications were observed after PTA. SAP was a relatively simple procedure, and its clinical results seemed acceptable.
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239
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Kaede K, Kato T, Yamaguchi M, Nakamura N, Yamada K, Masuda Y. Effects of lip-closing training on maximum voluntary lip-closing force during lip pursing in healthy young adults. J Oral Rehabil 2015; 43:169-75. [DOI: 10.1111/joor.12358] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/02/2015] [Indexed: 12/01/2022]
Affiliation(s)
- K. Kaede
- Department of Orthodontics; Matsumoto Dental University; Shiojiri Japan
| | - T. Kato
- Department of Oral Anatomy and Neurobiology; Osaka University Graduate School of Dentistry; Suita Japan
| | - M. Yamaguchi
- Department of Prosthodontics; Matsumoto Dental University; Shiojiri Japan
| | - N. Nakamura
- Department of Prosthodontics; Matsumoto Dental University; Shiojiri Japan
| | - K. Yamada
- Department of Orthodontics; Matsumoto Dental University; Shiojiri Japan
| | - Y. Masuda
- Institute for Oral Science; Matsumoto Dental University; Shiojiri Japan
- Department of Oral and Maxillofacial Biology; Graduate School of Oral Medicine; Matsumoto Dental University; Shiojiri Japan
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Ohno H, Nishimura N, Yamada K, Shimizu Y, Nishimura R, Iwase S, Sugenoya J, Sato M. Water nanodroplets emitted from an air conditioner increased skin moisture levels at the lateral canthus in winter by forming a lipid film with sebum. Skin Res Technol 2015; 22:388-90. [PMID: 26343808 DOI: 10.1111/srt.12262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2015] [Indexed: 11/28/2022]
Affiliation(s)
- H Ohno
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - N Nishimura
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - K Yamada
- Hitachi Appliances, Inc., Tokyo, Japan
| | - Y Shimizu
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - R Nishimura
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - S Iwase
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - J Sugenoya
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - M Sato
- The Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan
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241
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Koh S, Yamada K, Nishimoto M, Hayashi Y, Koh H, Nakashima Y, Nakane T, Hirose A, Nakamae M, Kakeya H, Hino M, Nakamae H. Effectiveness of antibacterial prophylaxis with non-absorbable polymyxin B compared to levofloxacin after allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2015; 17:647-54. [PMID: 26134140 DOI: 10.1111/tid.12416] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/25/2015] [Accepted: 06/22/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Fluoroquinolones are widely used for antibacterial prophylaxis during neutropenia following hematopoietic stem cell transplantation (HSCT). Nevertheless, data are inadequate as to whether fluoroquinolones decrease mortality rate compared with other antibiotics. METHODS We retrospectively compared the efficacy of antibacterial prophylaxis using non-absorbable polymyxin B (PB) (n = 106) or systemic levofloxacin (LVFX) (n = 140) after allogeneic SCT at our institute between 2004 and 2013. RESULTS No significant difference was observed between the 2 groups in the cumulative incidences of failure of prophylaxis (P = 0.21), clinically documented infections (P = 0.70), or non-relapse mortality within the first 100 days after transplantation (P = 0.42). With bacteremia, the rate of resistance to LVFX was 82% in the PB group and 100% in the LVFX group (P = 0.41). Also, no significant difference was found in overall survival between the 2 groups (P = 0.78). CONCLUSION Our results indicate no difference in the effectiveness of antibacterial prophylaxis between systemic antibiotic LVFX and non-absorbable antibiotic PB.
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Affiliation(s)
- S Koh
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - K Yamada
- Infection Control Science, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - M Nishimoto
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - Y Hayashi
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - H Koh
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - Y Nakashima
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - T Nakane
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - A Hirose
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - M Nakamae
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - H Kakeya
- Infection Control Science, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - M Hino
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - H Nakamae
- Hematology, Graduate School of Medicine, Osaka City University, Osaka, Japan
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242
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Sugiyama E, Matsumoto S, Yoh K, Ohe Y, Seto T, Murakami H, Iwama E, Sugawara S, Yamada K, Takeda K, Hosomi Y, Saeki S, Yokoyama T, Nishio M, Satouchi M, Tsuta K, Kohno T, Ishii G, Tsuchihara K, Goto K. 3043 Clinicopathological features of patients with ROS1-rearranged advanced non-small cell lung cancer: LC-SCRUM-Japan. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(15)30060-5] [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: 11/30/2022]
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243
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Miyatani F, Kuriyama N, Watanabe I, Nomura R, Nakano K, Matsui D, Ozaki E, Koyama T, Nishigaki M, Yamamoto T, Mizuno T, Tamura A, Akazawa K, Takada A, Takeda K, Yamada K, Nakagawa M, Ihara M, Kanamura N, Friedland RP, Watanabe Y. Relationship between Cnm-positive Streptococcus mutans and cerebral microbleeds in humans. Oral Dis 2015. [PMID: 26205098 DOI: 10.1111/odi.12360] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Cerebral hemorrhage has been shown to occur in animals experimentally infected with Streptococcus mutans carrying the collagen-binding Cnm gene. However, the relationship between cerebral microbleeds and oral hygiene, with a focus on Cnm gene-positive S. mutans infection, remains unclear. MATERIAL AND METHODS One hundred and thirty-nine subjects participated. The presence or absence of Cnm-positive S. mutans and its collagen-binding activity were investigated using saliva samples, and relationship with cerebral microbleeds detected on MRI investigated, including clinical information and oral parameters. RESULTS Fifty-one subjects were identified as Cnm-positive S. mutans carriers (36.7%), with cerebral microbleeds being detected in 43 (30.9%). A significantly larger number of subjects carried Cnm-positive S. mutans in the cerebral microbleeds (+) group. S. mutans with Cnm collagen-binding ability was detected in 39 (28.1%) of all subjects, and the adjusted odds ratio for cerebral microbleeds in the Cnm-positive group was 14.4. Regarding the presence of cerebral microbleeds, no significant differences were noted in the number of remaining teeth, dental caries, or in classic arteriosclerosis risk factors. CONCLUSIONS The occurrence of cerebral microbleeds was higher in subjects carrying Cnm-positive S. mutans, indicating that the presence of Cnm-positive S. mutans increases cerebral microbleeds, and is an independent risk for the development of cerebrovascular disorders.
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Affiliation(s)
- F Miyatani
- Departments of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - N Kuriyama
- Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - I Watanabe
- Departments of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - R Nomura
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - K Nakano
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - D Matsui
- Departments of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - E Ozaki
- Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Koyama
- Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Nishigaki
- Departments of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Yamamoto
- Departments of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - A Tamura
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - K Akazawa
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - A Takada
- Kyoto Industrial Health Association, Kyoto, Japan
| | - K Takeda
- Kyoto Industrial Health Association, Kyoto, Japan
| | - K Yamada
- Department of Radiology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Nakagawa
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Ihara
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - N Kanamura
- Departments of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - R P Friedland
- Department of Neurology, University of Louisville, KY, USA
| | - Y Watanabe
- Department of Epidemiology for Community health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
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244
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Hijikata Y, Okazaki T, Yamada K, Tani K, Murahashi M, Ogata H. 509 A phase I clinical trial of RNF43 peptide-specific immune cell therapy combined with low dose cyclophosphamide for patients with advanced solid tumors. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30310-0] [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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245
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Shirakawa M, Yoshimura S, Yamada K, Uchida K, Shindou S. Endovascular Treatment for Acute Ischemic Stroke: Considerations from Recent Randomized Trials. Interv Neurol 2015; 3:115-21. [PMID: 26279657 DOI: 10.1159/000375540] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND Despite increasing use of intravenous recombinant tissue plasminogen activator therapy, the large number of patients ineligible for treatment or for whom treatment is ineffective has become problematic. SUMMARY The number of endovascular treatments for acute ischemic stroke is increasing each year. This treatment provides higher recanalization rates for occluded vessels but may lead to hemorrhagic complications such as subarachnoid hemorrhage. Results were announced for three randomized controlled trials in 2013, with all failing to show the superiority of endovascular treatment. These results have had a major negative impact, but a new randomized controlled trial, the Multicenter Randomized CLinical trial of Endovascular treatment for Acute ischemic stroke in the Netherlands (MR CLEAN), showed that acute endovascular treatment was superior to standard medical treatment in terms of clinical outcomes. With this positive result, interim analyses from other randomized trials appear likely to show the effectiveness of endovascular treatment. KEY MESSAGE Clinical evidence of acute stroke intervention using mechanical devices might be established in the near future.
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Affiliation(s)
- Manabu Shirakawa
- Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Usa, Japan
| | - Shinichi Yoshimura
- Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Usa, Japan
| | - Kiyofumi Yamada
- Department of Neurosurgery, Sato Daiichi Hospital, Usa, Japan
| | - Kazutaka Uchida
- Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Usa, Japan
| | - Seigo Shindou
- Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Usa, Japan
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246
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Aguilar-Arevalo A, Aoki M, Blecher M, Britton DI, Bryman DA, Vom Bruch D, Chen S, Comfort J, Ding M, Doria L, Cuen-Rochin S, Gumplinger P, Hussein A, Igarashi Y, Ito S, Kettell SH, Kurchaninov L, Littenberg LS, Malbrunot C, Mischke RE, Numao T, Protopopescu D, Sher A, Sullivan T, Vavilov D, Yamada K. Improved Measurement of the π→eν Branching Ratio. Phys Rev Lett 2015; 115:071801. [PMID: 26317713 DOI: 10.1103/physrevlett.115.071801] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Indexed: 06/04/2023]
Abstract
A new measurement of the branching ratio R_{e/μ}=Γ(π^{+}→e^{+}ν+π^{+}→e^{+}νγ)/Γ(π^{+}→μ^{+}ν+π^{+}→μ^{+}νγ) resulted in R_{e/μ}^{exp}=[1.2344±0.0023(stat)±0.0019(syst)]×10^{-4}. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.
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Affiliation(s)
- A Aguilar-Arevalo
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de Mexico, Distrito Federal 04510 México
| | - M Aoki
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Blecher
- Physics Department, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - D I Britton
- Physics Department, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D A Bryman
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - D Vom Bruch
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - S Chen
- Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - J Comfort
- Physics Department, Arizona State University, Tempe, Arizona 85287, USA
| | - M Ding
- Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - L Doria
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - S Cuen-Rochin
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - P Gumplinger
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - A Hussein
- University of Northern British Columbia, Prince George, British Columbia V2N 4Z9, Canada
| | - Y Igarashi
- KEK, 1-1 Oho, Tsukuba-shi, Ibaraki 305-0801, Japan
| | - S Ito
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S H Kettell
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - L Kurchaninov
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - L S Littenberg
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - C Malbrunot
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - R E Mischke
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - T Numao
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - D Protopopescu
- Physics Department, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - A Sher
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - T Sullivan
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - D Vavilov
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - K Yamada
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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247
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Nakamura Y, Terahara M, Iwamoto T, Yamada K, Asano M, Kakuta S, Iwakura Y, Totsuka M. Upregulation of Polymeric Immunoglobulin Receptor Expression by the Heat-Inactivated Potential Probiotic Bifidobacterium bifidum OLB6378 in a Mouse Intestinal Explant Model. Scand J Immunol 2015; 75:176-83. [PMID: 21967771 DOI: 10.1111/j.1365-3083.2011.02645.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We determined whether a potential probiotic bacterium, Bifidobacterium bifidum OLB6378 (BB6378), exerts beneficial effects on the mucosal immune system in a mouse intestinal explant model. The addition of heat-inactivated BB6378 to intestinal explants prepared from embryonic day 18 BALB/c mice increased the expression of polymeric immunoglobulin receptor (pIgR) mRNA by two- to fivefold. These effects were observed on ileal and colonic explants but not on jejunal explants, suggesting that the BB6378-induced pIgR upregulation is site-specific within the mouse intestine. The upregulation of pIgR protein expression in colonic explants was also detected after 24 h of culture. The results of DNA microarray analysis of ileal and colonic samples indicated that BB6378 increased the gene expression of interleukin (IL)-1α and IL-1β, and IL-1α content in colonic explants was significantly increased after 20 h of culture with BB6378. We then examined the involvement of endogenously induced IL-1α in pIgR mRNA upregulation by using IL-1α knockout (KO) mice. Contrary to our expectations, pIgR mRNA expression was equally upregulated by BB6378 in colonic explants from BALB/c and IL-1α KO mice. Conversely, we examined the involvement of Toll-like receptors in pIgR mRNA upregulation by using MyD88 KO mice. The upregulation of pIgR was completely suppressed in the explants derived from MyD88 KO mice. Taken together, we conclude that in a mouse intestinal explant model, the heat-inactivated potential probiotic BB6378 increases intestinal pIgR expression in a site-specific manner and that the upregulation of pIgR could be explained by a direct microbial effect on the epithelium via Toll-like receptors.
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Affiliation(s)
- Y Nakamura
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - M Terahara
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - T Iwamoto
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - K Yamada
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - M Asano
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - S Kakuta
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - Y Iwakura
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
| | - M Totsuka
- Food Science Research Labs, R&D Division, Meiji Co. Ltd., Kanagawa, JapanDepartment of Applied Biological Chemistry, University of Tokyo, Tokyo, JapanDepartment of Pathology, Nihon University School of Dentistry, Tokyo, JapanCenter for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Tokyo, JapanResearch Center for Human and Environmental Sciences, Shinshu University, Nagano, JapanCREST, Japan Science and Technology Agency, Saitama, Japan
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Kato H, Miyazaki M, Takeuchi M, Tsukuura H, Sugishita M, Noda Y, Yamada K. A retrospective study to identify risk factors for somnolence and dizziness in patients treated with pregabalin. J Pharm Health Care Sci 2015; 1:22. [PMID: 26819733 PMCID: PMC4728751 DOI: 10.1186/s40780-015-0022-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 06/17/2015] [Indexed: 01/15/2023] Open
Abstract
Background Pregabalin is a therapeutic drug for neuropathic pain that is associated with somnolence and dizziness. These adverse events are often experienced shortly after initiating pregabalin, and may lead to treatment discontinuation. The purpose of this study was to explore factors that influence the incidence of somnolence and dizziness induced by pregabalin, and to identify patients at higher risk of adverse events. Methods A retrospective analysis was conducted of patient characteristics (age, gender, renal function, initial daily dose of pregabalin, co-administration of strong opioids and hypnotics) and the incidence of somnolence and dizziness during the first week of pregabalin treatment. An electronic chart was used to collect data from 204 inpatients prescribed pregabalin at Nagoya University Hospital from June 2011 to November 2012. Results Among 36 patients who regularly received strong opioids, 18 (50.0 %) reported somnolence or dizziness during the first week of pregabalin treatment. The remaining 168 patients did not regularly receive strong opioids, and 25 (14.9 %) had an adverse event. In multivariate analysis, age (≧65 years, adjusted odds ratio: 2.507, 95 % CI: 1.164-5.397, p = 0.019) and regular co-administration of strong opioids (adjusted odds ratio: 5.507, 95 % CI: 2.460-12.328, p < 0.001) correlated with somnolence or dizziness. Conclusions These data suggest that age (≧65 years) and co-administration of strong opioids are risk factors for somnolence or dizziness during pregabalin treatment for neuropathic pain. More careful dose titration is recommended for elderly patients and those receiving concomitant strong opioids.
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Affiliation(s)
- Hiroshi Kato
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560 Japan ; Division of Clinical Sciences and Neuropsychopharmacology, Meijo University Faculty of Pharmacy, Nagoya, Japan
| | - Masayuki Miyazaki
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560 Japan ; Division of Clinical Sciences and Neuropsychopharmacology, Meijo University Faculty of Pharmacy, Nagoya, Japan
| | - Mio Takeuchi
- Division of Clinical Sciences and Neuropsychopharmacology, Meijo University Faculty of Pharmacy, Nagoya, Japan
| | - Hiroaki Tsukuura
- Department of Clinical Oncology and Chemotherapy, Nagoya University Hospital, Nagoya, Japan
| | - Mihoko Sugishita
- Department of Clinical Oncology and Chemotherapy, Nagoya University Hospital, Nagoya, Japan
| | - Yukihiro Noda
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560 Japan ; Division of Clinical Sciences and Neuropsychopharmacology, Meijo University Faculty of Pharmacy, Nagoya, Japan
| | - Kiyofumi Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560 Japan
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Nguyen LM, Kuroyanagi R, Tsuchizawa T, Ishikawa Y, Yamada K, Wada K. Stress tuning of the fundamental absorption edge of pure germanium waveguides. Opt Express 2015; 23:18487-18492. [PMID: 26191906 DOI: 10.1364/oe.23.018487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One-dimensional stress dependence on the fundamental absorption edge of pure germanium (Ge) waveguide has theoretically and experimentally been studied, considering built-in two-dimensional stress-tensile Ge grown on Si. Based on the results, we have designed Ge Franz-Keldysh (FK) electroabsorption (EA) modulators to work at 1550 nm. Application of one-dimensional [110] compressive stress above -350 MPa on a pure Ge [-110] waveguide should allow 1550 nm light transmission, unless otherwise a pure Ge modulator can only operate at 1600 nm or longer due to the built-in two-dimensional tensile stress in Ge. The prediction has experimentally been verified using a SiNx stressor film. This concludes that the presented stress-tuning approach of the pure Ge waveguides should expand the operation wavelength of Ge FK-EA modulators to C band. Since stress tuning can be locally done in the back-end-of-line of complementary metal oxide semiconductor (CMOS) process, the presented stress-tuning method should enable "field-programable" control of the operation wavelengths of the monolithically integrated Ge modulators in Si photonics platform.
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Emoto MC, Yamato M, Sato-Akaba H, Yamada K, Matsuoka Y, Fujii HG. Brain imaging in methamphetamine-treated mice using a nitroxide contrast agent for EPR imaging of the redox status and a gadolinium contrast agent for MRI observation of blood-brain barrier function. Free Radic Res 2015; 49:1038-47. [PMID: 25968953 DOI: 10.3109/10715762.2015.1040787] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Methamphetamine (METH)-induced neurotoxicity is associated with mitochondrial dysfunction and enhanced oxidative stress. The aims of the present study conducted in the mouse brain repetitively treated with METH were to (1) examine the redox status using the redox-sensitive imaging probe 3-methoxycarbonyl-2,2,5,5-tetramethylpiperidine-1-oxyl (MCP) and (2) non-invasively visualize the brain redox status with electron paramagnetic resonance (EPR) imaging. The rate of reduction of MCP was measured from a series of temporal EPR images of mouse heads, and this rate was used to construct a two-dimensional map of rate constants called a "redox map." The obtained redox map clearly illustrated the change in redox balance in the METH-treated mouse brain that is a known result of oxidative damage. Biochemical assays also showed that the level of thiobarbituric acid-reactive substance, an index of lipid peroxidation, was increased in mouse brains by METH. The enhanced reduction in MCP observed in mouse brains was remarkably suppressed by treatment with the dopamine synthase inhibitor, α-methyl-p-tyrosine, suggesting that enhancement of the reduction reaction of MCP resulted from enzymatic reduction in the mitochondrial respiratory chain. Furthermore, magnetic resonance imaging (MRI) of METH-treated mice using a blood-brain barrier (BBB)-impermeable paramagnetic contrast agent revealed BBB dysfunction after treatment with METH for 7 days. MRI also indicated that the impaired BBB recovered after withdrawal of METH. EPR imaging and MRI are useful tools not only for following changes in the redox status and BBB dysfunction in mouse brains repeatedly administered METH, but also for tracing the drug effect after withdrawal of METH.
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Affiliation(s)
- M C Emoto
- Center for Medical Education, Sapporo Medical University, Sapporo , Hokkaido , Japan
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