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Kaptoge S, Seshasai SRK, Sun L, Walker M, Bolton T, Spackman S, Ataklte F, Willeit P, Bell S, Burgess S, Pennells L, Altay S, Assmann G, Ben-Shlomo Y, Best LG, Björkelund C, Blazer DG, Brenner H, Brunner EJ, Dagenais GR, Cooper JA, Cooper C, Crespo CJ, Cushman M, D'Agostino RB, Daimon M, Daniels LB, Danker R, Davidson KW, de Jongh RT, Donfrancesco C, Ducimetiere P, Elders PJM, Engström G, Ford I, Gallacher I, Bakker SJL, Goldbourt U, de La Cámara G, Grimsgaard S, Gudnason V, Hansson PO, Imano H, Jukema JW, Kabrhel C, Kauhanen J, Kavousi M, Kiechl S, Knuiman MW, Kromhout D, Krumholz HM, Kuller LH, Laatikainen T, Lowler DA, Meyer HE, Mukamal K, Nietert PJ, Ninomiya T, Nitsch D, Nordestgaard BG, Palmieri L, Price JF, Ridker PM, Sun Q, Rosengren A, Roussel R, Sakurai M, Salomaa V, Schöttker B, Shaw JE, Strandberg TE, Sundström J, Tolonen H, Tverdal A, Verschuren WMM, Völzke H, Wagenknecht L, Wallace RB, Wannamethee SG, Wareham NJ, Wassertheil-Smoller S, Yamagishi K, Yeap BB, Harrison S, Inouye M, Griffin S, Butterworth AS, Wood AM, Thompson SG, Sattar N, Danesh J, Di Angelantonio E, Tipping RW, Russell S, Johansen M, Bancks MP, Mongraw-Chaffin M, Magliano D, Barr ELM, Zimmet PZ, Knuiman MW, Whincup PH, Willeit J, Willeit P, Leitner C, Lawlor DA, Ben-Shlomo Y, Elwood P, Sutherland SE, Hunt KJ, Cushman M, Selmer RM, Haheim LL, Ariansen I, Tybjaer-Hansen A, Frikkle-Schmidt R, Langsted A, Donfrancesco C, Lo Noce C, Balkau B, Bonnet F, Fumeron F, Pablos DL, Ferro CR, Morales TG, Mclachlan S, Guralnik J, Khaw KT, Brenner H, Holleczek B, Stocker H, Nissinen A, Palmieri L, Vartiainen E, Jousilahti P, Harald K, Massaro JM, Pencina M, Lyass A, Susa S, Oizumi T, Kayama T, Chetrit A, Roth J, Orenstein L, Welin L, Svärdsudd K, Lissner L, Hange D, Mehlig K, Salomaa V, Tilvis RS, Dennison E, Cooper C, Westbury L, Norman PE, Almeida OP, Hankey GJ, Hata J, Shibata M, Furuta Y, Bom MT, Rutters F, Muilwijk M, Kraft P, Lindstrom S, Turman C, Kiyama M, Kitamura A, Yamagishi K, Gerber Y, Laatikainen T, Salonen JT, van Schoor LN, van Zutphen EM, Verschuren WMM, Engström G, Melander O, Psaty BM, Blaha M, de Boer IH, Kronmal RA, Sattar N, Rosengren A, Nitsch D, Grandits G, Tverdal A, Shin HC, Albertorio JR, Gillum RF, Hu FB, Cooper JA, Humphries S, Hill- Briggs F, Vrany E, Butler M, Schwartz JE, Kiyama M, Kitamura A, Iso H, Amouyel P, Arveiler D, Ferrieres J, Gansevoort RT, de Boer R, Kieneker L, Crespo CJ, Assmann G, Trompet S, Kearney P, Cantin B, Després JP, Lamarche B, Laughlin G, McEvoy L, Aspelund T, Thorsson B, Sigurdsson G, Tilly M, Ikram MA, Dorr M, Schipf S, Völzke H, Fretts AM, Umans JG, Ali T, Shara N, Davey-Smith G, Can G, Yüksel H, Özkan U, Nakagawa H, Morikawa Y, Ishizaki M, Njølstad I, Wilsgaard T, Mathiesen E, Sundström J, Buring J, Cook N, Arndt V, Rothenbacher D, Manson J, Tinker L, Shipley M, Tabak AG, Kivimaki M, Packard C, Robertson M, Feskens E, Geleijnse M, Kromhout D. Life expectancy associated with different ages at diagnosis of type 2 diabetes in high-income countries: 23 million person-years of observation. Lancet Diabetes Endocrinol 2023; 11:731-742. [PMID: 37708900 PMCID: PMC7615299 DOI: 10.1016/s2213-8587(23)00223-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND The prevalence of type 2 diabetes is increasing rapidly, particularly among younger age groups. Estimates suggest that people with diabetes die, on average, 6 years earlier than people without diabetes. We aimed to provide reliable estimates of the associations between age at diagnosis of diabetes and all-cause mortality, cause-specific mortality, and reductions in life expectancy. METHODS For this observational study, we conducted a combined analysis of individual-participant data from 19 high-income countries using two large-scale data sources: the Emerging Risk Factors Collaboration (96 cohorts, median baseline years 1961-2007, median latest follow-up years 1980-2013) and the UK Biobank (median baseline year 2006, median latest follow-up year 2020). We calculated age-adjusted and sex-adjusted hazard ratios (HRs) for all-cause mortality according to age at diagnosis of diabetes using data from 1 515 718 participants, in whom deaths were recorded during 23·1 million person-years of follow-up. We estimated cumulative survival by applying age-specific HRs to age-specific death rates from 2015 for the USA and the EU. FINDINGS For participants with diabetes, we observed a linear dose-response association between earlier age at diagnosis and higher risk of all-cause mortality compared with participants without diabetes. HRs were 2·69 (95% CI 2·43-2·97) when diagnosed at 30-39 years, 2·26 (2·08-2·45) at 40-49 years, 1·84 (1·72-1·97) at 50-59 years, 1·57 (1·47-1·67) at 60-69 years, and 1·39 (1·29-1·51) at 70 years and older. HRs per decade of earlier diagnosis were similar for men and women. Using death rates from the USA, a 50-year-old individual with diabetes died on average 14 years earlier when diagnosed aged 30 years, 10 years earlier when diagnosed aged 40 years, or 6 years earlier when diagnosed aged 50 years than an individual without diabetes. Using EU death rates, the corresponding estimates were 13, 9, or 5 years earlier. INTERPRETATION Every decade of earlier diagnosis of diabetes was associated with about 3-4 years of lower life expectancy, highlighting the need to develop and implement interventions that prevent or delay the onset of diabetes and to intensify the treatment of risk factors among young adults diagnosed with diabetes. FUNDING British Heart Foundation, Medical Research Council, National Institute for Health and Care Research, and Health Data Research UK.
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Kato H, Morikawa Y, Hagihara M, Mikamo H, Iwamoto T. Investigation of in-line filter replacement intervals for infusion. J Hosp Infect 2023; 134:147-152. [PMID: 36738993 DOI: 10.1016/j.jhin.2023.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/27/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND In-line filters in peripheral and central venous catheters are used to remove bacterial cells mechanically. A recent study indicated an extension of the use of infusion sets to 7 days. There is no evidence regarding replacement intervals for in-line filters. AIM To test in-line filters that were used continuously for 7 days in order to investigate their ability to remove bacteria and assess the flow rate. METHODS Three different in-line filters were attached to an ELNEOPA-NF No. 2 premixed infusion bag of intravenous hyperalimentation, into which Staphylococcus epidermidis ATCC12228 or Escherichia coli ATCC25922 was inoculated. These experiments were compared with a control infusion. The infusion was dropped at a flow rate of 40 mL/h and replaced at 24-h intervals for 7 days. Samples were collected 24 h after drop initiation. FINDINGS S. epidermidis was not detected in droplets between Days 1 and 6, but In-line filters 1 and 2 showed droplets containing 6-10 colony-forming units/mL on Day 7. E. coli was not detected in any of the filters after 7 days of continuous use. Flow rates <40 mL/h were observed on Day 7 for In-line filter 3 in studies of S. epidermidis, and on Days 4 and 3 for In-line filters 2 and 3, respectively, in studies of E. coli. CONCLUSION This study revealed differences in bacterial removal and flow rates under high inoculation between the three in-line filters tested. It is suggested that in-line filters can be used continuously for a maximum of 6 days, and reductions in flow rate after 48 h of continuous use should be noted carefully.
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Affiliation(s)
- H Kato
- Department of Pharmacy, Mie University Hospital, Mie, Japan; Department of Clinical Pharmaceutics, Division of Clinical Medical Science, Mie University Graduate School of Medicine, Mie, Japan; Department of Clinical Infectious Diseases, Aichi Medical University, Aichi, Japan.
| | - Y Morikawa
- Department of Pharmacy, Mie University Hospital, Mie, Japan; Department of Clinical Pharmaceutics, Division of Clinical Medical Science, Mie University Graduate School of Medicine, Mie, Japan
| | - M Hagihara
- Department of Clinical Infectious Diseases, Aichi Medical University, Aichi, Japan; Department of Molecular Epidemiology and Biomedical Sciences, Aichi Medical University Hospital, Aichi, Japan
| | - H Mikamo
- Department of Clinical Infectious Diseases, Aichi Medical University, Aichi, Japan
| | - T Iwamoto
- Department of Pharmacy, Mie University Hospital, Mie, Japan; Department of Clinical Pharmaceutics, Division of Clinical Medical Science, Mie University Graduate School of Medicine, Mie, Japan
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3
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Kojima Y, Nakajo K, Ichinose T, Morikawa Y, Osawa M, Goto T. Case report and review of the literature of primary central nervous system lymphoma of the fourth ventricle. Surg Neurol Int 2022; 13:529. [DOI: 10.25259/sni_654_2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/27/2022] [Indexed: 11/13/2022] Open
Abstract
Background:
Primary central nervous system lymphoma of the fourth ventricle is very rare. We present a case of primary central nervous system lymphoma originating from the fourth ventricle and review cases reported in the literature.
Case Description:
A 54-year-old man with no previous medical history presented with headache and nausea. Magnetic resonance imaging showed a homogeneously enhancing tumor in the fourth ventricle and obstructive hydrocephalus. We performed biopsy of the tumor, which was diagnosed pathologically as diffuse large B-cell lymphoma. Although the tumor disappeared after 5 cycles of R-MPV regimen, the patient required repeated ventricular drainage and finally received a ventriculoperitoneal shunt. Complete response was achieved after 2 cycles of high-dose cytarabine chemotherapy with an autologous peripheral blood stem cell transplant. There was no sign of recurrence at 20 months after biopsy.
Conclusion:
Morbidity arising due to radical resection/radiotherapy of resistant primary central nervous system lymphoma originating from the fourth ventricle could be prevented by ventriculoperitoneal shunting with chemotherapy and autologous blood stem cell transplantation.
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Affiliation(s)
- Yuichiro Kojima
- Department of Neurosurgery, Osaka Metropolitan University, Osaka, Japan
| | - Kosuke Nakajo
- Department of Neurosurgery, Osaka Metropolitan University, Osaka, Japan
| | - Tsutomu Ichinose
- Department of Neurosurgery, Osaka Metropolitan University, Osaka, Japan
| | | | - Masahiko Osawa
- Department of Pathology, Osaka Metropolitan University, Osaka, Japan
| | - Takeo Goto
- Department of Neurosurgery, Osaka Metropolitan University, Osaka, Japan
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Murakami K, Yamaguchi Y, Kida Y, Morikawa Y, Ujiie H, Sugahara H, Nannya Y, Ogawa S, Kanakura Y. Clonal Cytopenia of Undetermined Significance in a Patient with Congenital Wilms' Tumor 1 and Acquired DNMT3A Gene Mutations. Intern Med 2021; 60:3785-3788. [PMID: 34053991 PMCID: PMC8710374 DOI: 10.2169/internalmedicine.7571-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Congenital mutations of the Wilms' tumor 1 (WT1) gene can lead to various abnormalities, including renal/gonadal developmental disorders and cardiac malformations. Although there have been many reports of somatic WT1 mutations in patients with acute myeloid leukemia and myelodysplastic syndrome, congenital WT1 mutations have not been reported in hematological disorders. We herein report a patient with early-onset clonal cytopenia of undetermined significance that was associated with a congenital mutation of WT1 and an acquired mutation of DNMT3A [encoding DNA (cytosine-5)-methyltransferase 3A].
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Affiliation(s)
- Ken Murakami
- Department of Hematology, Sumitomo Hospital, Japan
| | | | - Yuko Kida
- Department of Hematology, Sumitomo Hospital, Japan
| | | | | | | | - Yasuhito Nannya
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Japan
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Murakami K, Yamaguchi Y, Kida Y, Morikawa Y, Ujiie H, Sugahara H, Kanakura Y. [Severe aplastic anemia exhibiting mild COVID-19 despite high serum IL-6 levels]. Rinsho Ketsueki 2021; 62:1488-1492. [PMID: 34732621 DOI: 10.11406/rinketsu.62.1488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
COVID-19 is a viral infection characterized by a cytokine storm similar to that in acute respiratory distress syndrome (ARDS). Neutrophils and monocytes are known to play an important role in tissue damage in ARDS. COVID-19 has been reported to be more severe in patients with hematological malignancies; however, there are few reports of COVID-19 in patients with aplastic anemia. Moreover, how aplastic anemia affects COVID-19 remains unclear. Here, we report the case of a COVID-19 patient with aplastic anemia who had high serum IL-6 levels but did not progress to the severe form of COVID-19. We inferred that severe neutropenia and monocytopenia due to aplastic anemia could contribute to a mild form of COVID-19, although a risk of more severe secondary bacterial infections exists.
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Affiliation(s)
| | | | - Yuko Kida
- Department of Hematology, Sumitomo Hospital
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6
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Nozaki K, Yokota T, Itotagawa E, Tsutsumi K, Kusakabe S, Morikawa Y, Fujita J, Fukushima K, Maeda T, Shibayama H, Hosen N, Kumanogo A, Kanakura Y. Whole-exome sequencing identified mutational profile of a case with T-cell chronic lymphocytic leukemia. Clin Case Rep 2020; 8:2251-2254. [PMID: 33235770 PMCID: PMC7669389 DOI: 10.1002/ccr3.3149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/26/2020] [Accepted: 06/12/2020] [Indexed: 11/11/2022] Open
Abstract
We believe that our report and further case reports on T-cell chronic lymphocytic leukemia with genetic profile will contribute to the molecular classification of this rare but distinct disease.
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Affiliation(s)
- Kenji Nozaki
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Takafumi Yokota
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Eri Itotagawa
- Department of Respiratory Medicine and Clinical ImmunologyGraduate School of MedicineOsaka UniversitySuitaJapan
| | - Kazuhito Tsutsumi
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Shinsuke Kusakabe
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Yoichiro Morikawa
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Jiro Fujita
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Kentaro Fukushima
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Tetsuo Maeda
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Hirohiko Shibayama
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Naoki Hosen
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
| | - Atsushi Kumanogo
- Department of Respiratory Medicine and Clinical ImmunologyGraduate School of MedicineOsaka UniversitySuitaJapan
| | - Yuzuru Kanakura
- Department of Hematology and OncologyOsaka University Graduate School of MedicineSuitaJapan
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Kume M, Kiyohara E, Aoyama R, Hayashi M, Morikawa Y, Maeda T, Tanemura A, Wataya-Kaneda M, Katayama I, Fujimoto M. Primary cutaneous anaplastic large cell lymphoma with rapid liver infiltration after spontaneous resolution of the primary lesion. J Dermatol 2020; 47:e190-e191. [PMID: 32141106 DOI: 10.1111/1346-8138.15299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miki Kume
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Eiji Kiyohara
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Reika Aoyama
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Misa Hayashi
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yoichiro Morikawa
- Department of Hematology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Tetsuo Maeda
- Department of Hematology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Atsushi Tanemura
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Mari Wataya-Kaneda
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Ichiro Katayama
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Manabu Fujimoto
- Department of Dermatology, Osaka University Graduate School of Medicine, Suita, Japan
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Nozaki K, Ezoe S, Hamaguchi M, Tsutsumi K, Kusakabe S, Morikawa Y, Fujita J, Fukushima K, Maeda T. Unexpected Complication of R-CHOP Chemotherapy: Rapidly Progressive Bronchiolitis Obliterans Syndrome. Eur J Case Rep Intern Med 2019; 6:001266. [PMID: 31890707 PMCID: PMC6886625 DOI: 10.12890/2019_001266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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] [Received: 08/28/2019] [Accepted: 09/10/2019] [Indexed: 11/05/2022] Open
Abstract
Background Bronchiolitis obliterans syndrome (BOS) is the term used for the progressive obliteration of small airways before the patient has had a confirmatory lung biopsy. It is also recognized as a transplant-related complication. There have been no reports of BOS during initial standard chemotherapy. Case presentation A 50-year-old woman with newly diagnosed follicular lymphoma grade 2, stage 3A, presented with hypoxia and progressive dyspnoea after the fifth cycle of R-CHOP. High-resolution computed tomography showed air trapping enhanced at the end-expiratory phase. Pulmonary function testing revealed severe obstructive and restrictive failure without bronchodilator response. We diagnosed BOS based on current criteria and treated the patient with glucocorticoids and cyclosporin. She was discharged home on oxygen therapy. However, soon after discharge, her respiratory symptoms deteriorated and she was hospitalized in a palliative care unit. She died of respiratory failure within a year of symptom onset. Conclusions This is the first case report to describe rapidly progressive BOS in a patient undergoing R-CHOP treatment, which strongly suggests the condition was caused by the chemotherapy. Although a pathological diagnosis was not obtained, the clinical diagnosis of BOS was important so that the patient could receive appropriate treatment and palliative care based on the prognosis of this incurable condition. LEARNING POINTS
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Affiliation(s)
- Kenji Nozaki
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Sachiko Ezoe
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Masanari Hamaguchi
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kazuhito Tsutsumi
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shinsuke Kusakabe
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoichiro Morikawa
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jiro Fujita
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kentaro Fukushima
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tetsuo Maeda
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
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Akuta K, Kashiwagi H, Yujiri T, Nishiura N, Morikawa Y, Kato H, Honda S, Kanakura Y, Tomiyama Y. A unique phenotype of acquired Glanzmann thrombasthenia due to non-function-blocking anti-αIIbβ3 autoantibodies. J Thromb Haemost 2019; 17:206-219. [PMID: 30388316 DOI: 10.1111/jth.14323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 10/27/2018] [Indexed: 11/29/2022]
Abstract
Essentials Acquired Glanzmann thrombasthenia (aGT) is generally caused by function-blocking antibodies (Abs). We demonstrated a unique aGT case due to marked reduction of αIIbβ3 with anti-αIIbβ3 Abs. The anti-αIIbβ3 Abs of the patient did not inhibit platelet function but reduced surface αIIbβ3. Internalization of αIIbβ3 induced by the Abs binding may be responsible for the phenotype. SUMMARY: Background Acquired Glanzmann thrombasthenia (aGT) is a bleeding disorder generally caused by function-blocking anti-αIIbβ3 autoantibodies. Aim We characterize an unusual case of aGT caused by marked reduction of surface αIIbβ3 with non-function-blocking anti-αIIbβ3 antibodies (Abs). Methods A 72-year-old male suffering from immune thrombocytopenia since his 50s showed exacerbation of bleeding symptom despite mild thrombocytopenia. Platelet aggregation was absent with all agonists but ristocetin. Analysis of αIIbβ3 expression and genetic analysis were performed. We also analyzed effects of anti-αIIbβ3 Abs of the patient on platelet function and αIIbβ3 expression. Results Surface αIIbβ3 expression was markedly reduced to around 5% of normal, whereas his platelets contained αIIbβ3 to the amount of 40-50% of normal. A substantial amount of fibrinogen was also detected in his platelets. There were no abnormalities in ITGA2B and ITGB3 cDNA. These results indicated that reduced surface αIIbβ3 expression caused a GT phenotype, and active internalization of αIIbβ3 was suggested. Anti-αIIbβ3 IgG Abs were detected in platelet eluate and plasma. These Abs did not inhibit PAC-1 binding, indicating that the Abs were non-function-blocking. Surface αIIbβ3 expression of a megakaryocytic cell line and cultured megakaryocytes tended to be impaired by incubation with the patient's Abs. After 2 years of aGT diagnosis, his bleeding symptom improved and surface αIIbβ3 expression was recovered to 20% of normal with reduction of anti-αIIbβ3 Abs. Conclusion We demonstrated a unique aGT phenotype due to marked reduction of surface αIIbβ3. Internalization induced by anti-αIIbβ3 Abs may be responsible in part for the phenotype.
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Affiliation(s)
- K Akuta
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - H Kashiwagi
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - T Yujiri
- Third Department of Internal Medicine, Yamaguchi University School of Medicine, Ube, Japan
| | - N Nishiura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Y Morikawa
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - H Kato
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - S Honda
- Department of Molecular Pathogenesis, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Kanakura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
| | - Y Tomiyama
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Japan
- Department of Blood Transfusion, Osaka University Hospital, Suita, Japan
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Morikawa Y, Kato H, Kashiwagi H, Nishiura N, Akuta K, Honda S, Kanakura Y, Tomiyama Y. Protease-activated receptor-4 (PAR4) variant influences on platelet reactivity induced by PAR4-activating peptide through altered Ca 2+ mobilization and ERK phosphorylation in healthy Japanese subjects. Thromb Res 2018; 162:44-52. [DOI: 10.1016/j.thromres.2017.12.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 12/09/2017] [Accepted: 12/22/2017] [Indexed: 11/29/2022]
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Kohagura J, Yoshikawa M, Shima Y, Morikawa Y, Akita D, Hasegawa Y, Sakamoto M, Ichimura M, Imai T. Electron Density and Fluctuation Measurements by Using a Frequency Multiplied Microwave Interferometer in the GAMMA 10 Anchor Cell. Fusion Science and Technology 2017. [DOI: 10.13182/fst13-a16899] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. Kohagura
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Shima
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Morikawa
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - D. Akita
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Hasegawa
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Sakamoto
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Imai
- 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
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Isohashi A, Bui PV, Toh D, Matsuyama S, Sano Y, Inagaki K, Morikawa Y, Yamauchi K. Chemical etching of silicon carbide in pure water by using platinum catalyst. Appl Phys Lett 2017; 110:201601. [PMID: 28611484 PMCID: PMC5432371 DOI: 10.1063/1.4983206] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 04/27/2017] [Indexed: 05/15/2023]
Abstract
Chemical etching of SiC was found to proceed in pure water with the assistance of a Pt catalyst. A 4H-SiC (0001) wafer was placed and slid on a polishing pad in pure water, on which a thin Pt film was deposited to give a catalytic nature. Etching of the wafer surface was observed to remove protrusions preferentially by interacting with the Pt film more frequently, thus flattening the surface. In the case of an on-axis wafer, a crystallographically ordered surface was obtained with a straight step-and-terrace structure, the height of which corresponds to that of an atomic bilayer of Si and C. The etching rate depended upon the electrochemical potential of Pt. The vicinal surface was observed at the potential at which the Pt surface was bare. The primary etching mechanism was hydrolysis with the assistance of a Pt catalyst. This method can, therefore, be used as an environmentally friendly and sustainable technology.
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Affiliation(s)
- Ai Isohashi
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - P V Bui
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - D Toh
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - S Matsuyama
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Y Sano
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - K Inagaki
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
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13
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Sakurai M, Yoshita K, Nakamura K, Miura K, Takamura T, Nagasawa SY, Morikawa Y, Kido T, Naruse Y, Nogawa K, Suwazono Y, Sasaki S, Ishizaki M, Nakagawa H. Skipping breakfast and 5-year changes in body mass index and waist circumference in Japanese men and women. Obes Sci Pract 2017; 3:162-170. [PMID: 28702211 PMCID: PMC5478803 DOI: 10.1002/osp4.106] [Citation(s) in RCA: 29] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 03/06/2017] [Accepted: 03/11/2017] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE This study investigated the relationship between frequency of skipping breakfast and annual changes in body mass index (BMI) and waist circumference (WC). METHODS The participants were 4,430 factory employees. BMI and WC were measured repeatedly at annual medical examinations over a 5-year period. The association between frequency of skipping breakfast at the baseline examination and annual changes in anthropometric indices was evaluated using the generalized estimating equation method. RESULTS The mean (standard deviation) BMI was 23.3 (3.0) kg m-2 for men and 21.9 (3.6) kg m-2 for women; and the mean WC was 82.6 (8.7) cm for men and 77.8 (9.8) cm for women. During the follow-up period, mean BMI increased by 0.2 kg m-2 for men and women, and mean WC increased by 1.1 cm for men and 1.0 cm for women. The annual change in the BMI of men who skipped breakfast four to six times per week was 0.061 kg m-2 higher, and that of those who skipped breakfast seven times per week was 0.046 kg m-2 higher, compared with those who did not skip breakfast. Annual changes in the WC of male participants who skipped breakfast seven times per week was 0.248 cm higher than that of those who did not skip breakfast. Skipping breakfast was not associated with changes in BMI or WC in women. CONCLUSIONS Skipping breakfast was closely associated with annual changes in BMI and WC among men, and eating breakfast more than four times per week may prevent the excessive body weight gain associated with skipping breakfast.
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Affiliation(s)
- M Sakurai
- Department of Social and Environmental Medicine Kanazawa Medical University Uchinada Japan.,Health Evaluation Center Kanazawa Medical University Hospital Uchinada Japan
| | - K Yoshita
- Department of Food Science and Nutrition, Graduate School of Human Life Science Osaka City University Osaka Japan
| | - K Nakamura
- Department of Public Health Hokkaido University Graduate School of Medicine Sapporo Japan
| | - K Miura
- Department of Health Science Shiga University of Medical Science Otsu Japan
| | - T Takamura
- Department of Endocrinology and Metabolism Kanazawa University Graduate School of Medical Science Kanazawa Japan
| | - S Y Nagasawa
- Health Evaluation Center Kanazawa Medical University Hospital Uchinada Japan.,Department of Epidemiology and Public Health Kanazawa Medical University Uchinada Japan
| | - Y Morikawa
- Department of Medical Science, School of Nursing Kanazawa Medical University Uchinada Japan
| | - T Kido
- School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences Kanazawa University Kanazawa Japan
| | - Y Naruse
- Department of Social Welfare Toyama College of Welfare ScienceImizu Japan
| | - K Nogawa
- Department of Occupation and Environmental Medicine, Graduate School of Medicine Chiba University Chiba Japan
| | - Y Suwazono
- Department of Occupation and Environmental Medicine, Graduate School of Medicine Chiba University Chiba Japan
| | - S Sasaki
- Department of Social and Preventive Epidemiology, School of Public Health University of Tokyo Tokyo Japan
| | - M Ishizaki
- Department of Social and Environmental Medicine Kanazawa Medical University Uchinada Japan.,Health Evaluation Center Kanazawa Medical University Hospital Uchinada Japan
| | - H Nakagawa
- Medical Research Institute Kanazawa Medical University Uchinada Japan
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14
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Affiliation(s)
- Y. Morikawa
- NERC Institute of Virology, Mansfield Road, Oxford OX1 3SR, UK
| | - K. Ohki
- Institute of Immunological Science, Hokkaido University, Sapporo, Japan
| | - K. Ikuta
- Institute of Immunological Science, Hokkaido University, Sapporo, Japan
| | - I. Jones
- NERC Institute of Virology, Mansfield Road, Oxford OX1 3SR, UK
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15
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Kahr P, Tao G, Morikawa Y, Zhang M, Li L, Sun Z, Amendt B, Martin J. Transcription Factor Pitx2 Promotes Myocardial Regeneration after Ischemic Injury. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Sakurai M, Nakamura K, Miura K, Takamura T, Yoshita K, Nagasawa SY, Morikawa Y, Ishizaki M, Kido T, Naruse Y, Suwazono Y, Sasaki S, Nakagawa H. Sugar-sweetened beverage and diet soda consumption and the 7-year risk for type 2 diabetes mellitus in middle-aged Japanese men. Eur J Nutr 2015; 53:1137-8. [PMID: 24633756 DOI: 10.1007/s00394-014-0681-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- M Sakurai
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan,
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17
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Matsumi Y, Fujita K, Takashima Y, Yanagida K, Morikawa Y, Matsumoto-Nakano M. Contribution of glucan-binding protein A to firm and stable biofilm formation by Streptococcus mutans. Mol Oral Microbiol 2014; 30:217-26. [PMID: 25256943 DOI: 10.1111/omi.12085] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2014] [Indexed: 11/27/2022]
Abstract
Glucan-binding proteins (Gbps) of Streptococcus mutans, a major pathogen of dental caries, mediate the binding of glucans synthesized from sucrose by the action of glucosyltransferases (GTFs) encoded by gtfB, gtfC, and gtfD. Several stress proteins, including DnaK and GroEL encoded by dnaK and groEL, are related to environmental stress tolerance. The contribution of Gbp expression to biofilm formation was analyzed by focusing on the expression levels of genes encoding GTFs and stress proteins. Biofilm-forming assays were performed using GbpA-, GbpB-, and GbpC-deficient mutant strains and the parental strain MT8148. The expression levels of gtfB, gtfC, gtfD, dnaK, and groEL were evaluated by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). Furthermore, the structure of biofilms formed by these Gbp-deficient mutant strains was observed using confocal laser scanning microscopy (CLSM). Biofilm-forming assay findings demonstrated that the amount formed by the GbpA-deficient mutant strain (AD1) was nearly the same as that by the parental strain, while the GbpB- and GbpC-deficient mutant strains produced lower amounts than MT8148. Furthermore, RT-qPCR assay results showed that the expressions of gtfB, dnaK, and groEL in AD1 were elevated compared with MT8148. CLSM also revealed that the structure of biofilm formed by AD1 was prominently different compared with that formed by the parental strain. These results suggest that a defect in GbpA influences the expression of genes controlling biofilm formation, indicating its importance as a protein for firm and stable biofilm formation.
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Affiliation(s)
- Y Matsumi
- Department of Pediatric Dentistry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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18
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Nishijo M, Pham TT, Nguyen ATN, Tran NN, Nakagawa H, Hoang LV, Tran AH, Morikawa Y, Ho MD, Kido T, Nguyen MN, Nguyen HM, Nishijo H. 2,3,7,8-Tetrachlorodibenzo-p-dioxin in breast milk increases autistic traits of 3-year-old children in Vietnam. Mol Psychiatry 2014; 19:1220-6. [PMID: 24637425 DOI: 10.1038/mp.2014.18] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 01/18/2014] [Accepted: 02/03/2014] [Indexed: 01/29/2023]
Abstract
Dioxin levels in the breast milk of mothers residing near a contaminated former airbase in Vietnam remain much higher than in unsprayed areas, suggesting high perinatal dioxin exposure for their infants. The present study investigated the association of perinatal dioxin exposure with autistic traits in 153 3-year-old children living in a contaminated area in Vietnam. The children were followed up from birth using the neurodevelopmental battery Bayley-III. The high-2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposed groups (⩾3.5 pg per g fat) showed significantly higher Autism Spectrum Rating Scale (ASRS) scores for both boys and girls than the mild-TCDD exposed groups, without differences in neurodevelopmental scores. In contrast, the high total dioxin-exposed group, indicated by polychlorinated dibenzo-p-dioxins/furans (PCDDs/Fs)--the toxic equivalents (TEQ) levels⩾17.9 pg-TEQ per g fat, had significantly lower neurodevelopmental scores than the mild-exposed group in boys, but there was no difference in the ASRS scores. The present study demonstrates a specific impact of perinatal TCDD on autistic traits in childhood, which is different from the neurotoxicity of total dioxins (PCDDs/Fs).
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Affiliation(s)
- M Nishijo
- Department of Public Health, Kanazawa Medical University, Ishikawa, Japan
| | - T T Pham
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam
| | - A T N Nguyen
- Department of Public Health, Kanazawa Medical University, Ishikawa, Japan
| | - N N Tran
- Department of Public Health, Kanazawa Medical University, Ishikawa, Japan
| | - H Nakagawa
- Department of Public Health, Kanazawa Medical University, Ishikawa, Japan
| | - L V Hoang
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam
| | - A H Tran
- Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam
| | - Y Morikawa
- School of Nursing, Kanazawa Medical University, Ishikawa, Japan
| | - M D Ho
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
| | - T Kido
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
| | - M N Nguyen
- 1] Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam [2] System Emotional Science, Graduate School of Medicine and Pharmaceutical Science, University of Toyama, Toyama, Japan
| | - H M Nguyen
- 1] Biomedical and Pharmaceutical Research Center, Vietnam Military Medical University, Ha Noi, Vietnam [2] System Emotional Science, Graduate School of Medicine and Pharmaceutical Science, University of Toyama, Toyama, Japan
| | - H Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Science, University of Toyama, Toyama, Japan
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19
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Matsunaga T, Yamaji Y, Tomokuni T, Morita H, Morikawa Y, Suzuki A, Yonezawa A, Endo S, Ikari A, Iguchi K, El-Kabbani O, Tajima K, Hara A. Nitric oxide confers cisplatin resistance in human lung cancer cells through upregulation of aldo-keto reductase 1B10 and proteasome. Free Radic Res 2014; 48:1371-85. [PMID: 25156503 DOI: 10.3109/10715762.2014.957694] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [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
In this study, we show that exposure of human lung cancer A549 cells to cisplatin (cis-diamminedichloroplatinum, CDDP) promotes production of nitric oxide (NO) through generation of reactive oxygen species (ROS) and resulting upregulation of inducible NO synthase (iNOS). The incubation of the cells with a NO donor, diethylenetriamine NONOate, not only reduced the CDDP-induced cell death and apoptotic alterations (induction of CCAAT-enhancer-binding protein homologous protein and caspase-3 activation), but also elevated proteolytic activity of 26S proteasome, suggesting that the activation of proteasome function contributes to the reduction of CDDP sensitivity by NO. Monitoring expression levels of six aldo-keto reductases (AKRs) (1A1, 1B1, 1B10, 1C1, 1C2, and 1C3) during the treatment with the NO donor and subsequent CDDP sensitivity test using the specific inhibitors also proposed that upregulation of AKR1B10 by NO is a key process for acquiring the CDDP resistance in A549 cells. Treatment with CDDP and NO increased amounts of nitrotyrosine protein adducts, indicative of peroxynitrite formation, and promoted the induction of AKR1B10, inferring a relationship between peroxynitrite formation and the enzyme upregulation in the cells. The treatment with CDDP or a ROS-related lipid aldehyde, 4-hydroxy-2-nonenal, facilitated the iNOS upregulation, which was restored by increasing the AKR1B10 expression. In contrast, the facilitation of NO production by CDDP treatment was hardly observed in AKR1B10-overexpressing A549 cells and established CDDP-resistant cancer cells (A549, LoVo, and PC3). Collectively, these results suggest the NO functions as a key regulator controlling AKR1B10 expression and 26S proteasome function leading to gain of the CDDP resistance.
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Affiliation(s)
- T Matsunaga
- Laboratory of Biochemistry, Gifu Pharmaceutical University , Gifu , Japan
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20
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Akita D, Yoshikawa M, Sakamoto M, Kohagura J, Shima Y, Yamada T, Morikawa Y, Hasegawa Y, Imai T. Improvement of Measurement Accuracy of the Phase Imaging Interferometer in GAMMA 10. Fusion Science and Technology 2013. [DOI: 10.13182/fst13-a16946] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- D. Akita
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Sakamoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Shima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Yamada
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Morikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Hasegawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Imai
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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21
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Hasegawa Y, Yoshikawa M, Kohagura J, Sakamoto M, Shima Y, Akita D, Morikawa Y, Ichimura M, Imai T. Radial Electron Density Measurement by Using a Multi-Channel Microwave Interferometer in the Tandem Mirror GAMMA 10. Fusion Science and Technology 2013. [DOI: 10.13182/fst13-a16947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Hasegawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Sakamoto
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Shima
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - D. Akita
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Morikawa
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Ichimura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Imai
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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22
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Morikawa Y, Yoshikawa M, Kohagura J, Shima Y, Hasegawa Y, Akita D, Sakamoto M, Imai T. Density Fluctuation Measurements of the GAMMA 10 Plasma by Using the Fraunhofer Diffraction Method. Fusion Science and Technology 2013. [DOI: 10.13182/fst13-a16945] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Morikawa
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Yoshikawa
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - J. Kohagura
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Shima
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Y. Hasegawa
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - D. Akita
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - M. Sakamoto
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - T. Imai
- Plasma Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
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23
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Sakurai M, Nakamura K, Miura K, Takamura T, Yoshita K, Nagasawa SY, Morikawa Y, Ishizaki M, Kido T, Naruse Y, Suwazono Y, Sasaki S, Nakagawa H. Sugar-sweetened beverage and diet soda consumption and the 7-year risk for type 2 diabetes mellitus in middle-aged Japanese men. Eur J Nutr 2013; 53:251-8. [PMID: 23575771 DOI: 10.1007/s00394-013-0523-9] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 04/02/2013] [Indexed: 12/17/2022]
Abstract
PURPOSE This cohort study investigated the association between sugar-sweetened beverage (SSB) and diet soda consumption and the incidence of type 2 diabetes in Japanese men. METHODS The participants were 2,037 employees of a factory in Japan. We measured consumption of SSB and diet soda using a self-administered diet history questionnaire. The incidence of diabetes was determined in annual medical examinations over a 7-year period. Hazard ratios (HRs) with 95 % confidence intervals (CIs) for diabetes were estimated after adjusting for age, body mass index, family history, and dietary and other lifestyle factors. RESULTS During the study, 170 participants developed diabetes. The crude incidence rates (/1,000 person-years) across participants who were rare/never SSB consumers, <1 serving/week, ≥ 1 serving/week and <1 serving/day, and ≥ 1 serving/day were 15.5, 12.7, 14.9, and 17.4, respectively. The multivariate-adjusted HR compared to rare/never SSB consumers was 1.35 (95 % CI 0.80-2.27) for participants who consumed ≥ 1 serving/day SSB. Diet soda consumption was significantly associated with the incident risk of diabetes (P for trend = 0.013), and multivariate-adjusted HRs compared to rare/never diet soda consumers were 1.05 (0.62-1.78) and 1.70 (1.13-2.55), respectively, for participants who consumed <1 serving/week and ≥ 1 serving/week. CONCLUSIONS Consumption of diet soda was significantly associated with an increased risk for diabetes in Japanese men. Diet soda is not always effective at preventing type 2 diabetes even though it is a zero-calorie drink.
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Affiliation(s)
- M Sakurai
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan,
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24
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Nakamura K, Sakurai M, Miura K, Morikawa Y, Nagasawa S, Ishizaki M, Kido T, Naruse Y, Suwazono Y, Nakagawa H. Serum gamma-glutamyltransferase and the risk of hyperuricemia: a 6-year prospective study in Japanese men. Horm Metab Res 2012; 44:966-74. [PMID: 22821008 DOI: 10.1055/s-0032-1321788] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We conducted a longitudinal study to investigate whether increased serum gamma-glutamyltransferase independently predicts subsequent development of hyperuricemia. The study participants included 3,310 Japanese men without hyperuricemia, aged 20-54 years. The participants had annual heath examinations for 6 years to assess incident hyperuricemia (defined as serum uric acid>416.4 μmol/l and/or taking medication for hyperuricemia). The risk of incident hyperuricemia was compared in participants grouped according to their baseline serum gamma-glutamyltransferase level. During follow-up, there were 529 incident cases of hyperuricemia. A positive, dose-response relationship was observed between serum gamma-glutamyltransferase and the risk of incident hyperuricemia. The hazard ratios (95% confidence intervals) for hyperuricemia, compared with a serum gamma-glutamyltransferase level ≤19 U/l, were 1.32 (1.05-1.67) for 20-39 U/l, 1.28 (0.90-1.83) for 40-59 U/l, 1.56 (0.98-2.47) for 60-79 U/l, and 1.57 (1.02-2.41) for ≥80 U/l after adjustment for baseline serum uric acid, creatinine, total cholesterol, and glycated hemoglobin levels, ln(serum alanine aminotransferase), age, systolic blood pressure, medications for hypertension, hypercholesterolemia, and diabetes, body mass index, and smoking and exercise habits. A similar positive relationship was observed regardless of the presence or absence of alcohol drinking, obesity, metabolic disorders (any combination of hypertension, hypercholesterolemia and/or diabetes), or clinically high serum aminotransferases, without evidence of a significant interaction between increased serum gamma-glutamyltransferase and risk factors for incident hyperuricemia. These findings indicate that increased serum gamma-glutamyltransferase is an independent predictor of subsequent development of hyperuricemia.
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Affiliation(s)
- K Nakamura
- Department of Epidemiology and Public Health, Kanazawa Medical University, Uchinada, Japan.
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25
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Nakamura K, Sakurai M, Miura K, Morikawa Y, Yoshita K, Ishizaki M, Kido T, Naruse Y, Suwazono Y, Nakagawa H. Alcohol intake and the risk of hyperuricaemia: a 6-year prospective study in Japanese men. Nutr Metab Cardiovasc Dis 2012; 22:989-996. [PMID: 21421297 DOI: 10.1016/j.numecd.2011.01.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 12/07/2010] [Accepted: 01/04/2011] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND AIMS Since there is little information derived from prospective studies on the amount of alcohol drinking required to induce hyperuricaemia, we attempted to address this issue in a Japanese population. METHODS AND RESULTS A total of 3310 Japanese men aged 20-54 years that were free of hyperuricaemia were classified according to their alcohol intake per week at baseline. Incident hyperuricaemia, defined as >7.0 mg/dl and/or taking medication for hyperuricaemia, was assessed through annual heath examinations for 6 years after the baseline examination. During follow-up, 529 incident cases of hyperuricaemia occurred. There was a positive, dose-response relationship between alcohol intake and the risk of incident hyperuricaemia. The hazard ratio (95% confidence interval) for hyperuricaemia in drinkers compared with non-drinkers was 1.10 (0.85-1.42) for <10.0 drinks/week, 1.40 (1.07-1.84) for 10.0-19.9 drinks/week, 1.64 (1.23-2.21) for 20.0-29.9 drinks/week and 1.98 (1.40-2.80) for ≥30.0 drinks/week (one drink contained 11.5 g of ethanol) after adjusting for age, baseline serum uric acid, body mass index, smoking habits, exercise habits, serum creatinine, blood pressure, serum cholesterol and blood glucose. The fraction of hyperuricaemia in the population attributable to alcohol intake was 21.6%. A clear dose-response pattern was observed for both beer and sake, when the consumption of these two beverages was analysed separately. CONCLUSION Habitual alcohol intake significantly contributed to the development of hyperuricaemia in Japanese men, regardless of type of alcoholic beverage consumed. Therefore, it is essential to reduce excessive alcohol intake to prevent and manage hyperuricaemia.
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Affiliation(s)
- K Nakamura
- Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan.
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Kohagura J, Yoshikawa M, Shima Y, Morikawa Y, Yamada T, Akita D, Tatebe K, Ichimura M, Hirata M, Ikezoe R, Yokoyama T, Imai T. A new frequency-multiplied interferometer system in the GAMMA 10 tandem mirror. Rev Sci Instrum 2012; 83:10E310. [PMID: 23126970 DOI: 10.1063/1.4731006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new interferometer is installed on the west anchor cell of the GAMMA 10 tandem mirror. In GAMMA 10, we have used a heterodyne-type interferometer with a 70-GHz IMPATT oscillator and a 150-MHz oscillator for frequency modulation. The new interferometer consists of a 17.5-GHz phase locked dielectric resonator oscillator and a 37.5-MHz temperature-compensated crystal oscillator, as well as frequency multipliers. The main motivation for the new interferometer using frequency multipliers is to achieve a stable and cost effective interferometer. Direct anchor heating experiments with new anchor ion cyclotron range of frequency antennas in both the west and the east anchor cells are carried out. Density increases in both anchor cells are clearly observed using the new interferometer.
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Affiliation(s)
- J Kohagura
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki, Japan.
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Sakamoto Y, Umeda T, Ike M, Tanaka N, Suzuki Y, Ogasawara W, Okada H, Nonaka T, Morikawa Y, Nakamura KT. Structures of exo-β- D-glucosaminidase, a chitosan degrading enzyme from Trichoderma reesei. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311079888] [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: 11/10/2022] Open
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28
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Kobayashi Y, Yasuhiko S, Morikawa Y, Kajiwara K, Hata K. Nanostructure formation onto a tip of field gas ion emitter by field-assisted oxygen etching. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3612] [Citation(s) in RCA: 4] [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: 11/08/2022]
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Nakamura K, Sakurai M, Miura K, Morikawa Y, Ishizaki M, Yoshita K, Kido T, Naruse Y, Nakagawa H. Homeostasis model assessment of insulin resistance and the risk of cardiovascular events in middle-aged non-diabetic Japanese men. Diabetologia 2010; 53:1894-902. [PMID: 20502862 DOI: 10.1007/s00125-010-1803-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Accepted: 04/27/2010] [Indexed: 10/19/2022]
Abstract
AIMS/HYPOTHESIS Little is known about the relationship between the HOMA of insulin resistance (HOMA-IR) and the risk of cardiovascular events in Asian populations, which have lower levels of HOMA-IR than Western populations. Accordingly, we determined the predictive value of HOMA-IR for cardiovascular risk in a Japanese population that was apparently free of diabetes, addressing whether insulin resistance itself increases cardiovascular risk independently of other relevant metabolic disorders. METHODS We followed 2,548 non-diabetic men aged 35 to 59 years for 11 years. The hazard ratios for the incidence of cardiovascular events due to increased HOMA-IR were estimated using a Cox proportional hazards model that was adjusted for potential confounding factors. RESULTS The multivariate-adjusted hazard ratio for cardiovascular events compared with the first quartile of HOMA-IR (<or=0.66) was 1.07 (95% CI 0.44-2.64) for the second (HOMA-IR 0.67-1.01), 1.36 (0.56-3.28) for the third (HOMA-IR 1.02-1.51) and 2.50 (1.02-6.10) for the fourth quartile (HOMA-IR >or=1.52). The hazard ratio associated with a one SD (0.61) increment in log-transformed HOMA-IR was 1.51 (1.13-2.02). A similar positive relationship was observed for coronary events and stroke. In addition, the relationship between HOMA-IR and cardiovascular risk was broadly similar in participants with and without hypertension, dyslipidaemia (elevated triacylglycerol and/or reduced HDL-cholesterol), abdominal obesity and current smoking. CONCLUSIONS/INTERPRETATION Increased HOMA-IR predicted subsequent cardiovascular events in non-diabetic Japanese men. The association was independent of traditional cardiovascular risk factors and other relevant metabolic disorders.
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Affiliation(s)
- K Nakamura
- Department of Epidemiology and Public Health, Kanazawa Medical University, Uchinada, Ishikawa, Japan.
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30
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Nogawa M, Takahashi H, Kashiwagi A, Ohshima K, Okada H, Morikawa Y. Purification and Characterization of Exo-beta-d-Glucosaminidase from a Cellulolytic Fungus, Trichoderma reesei PC-3-7. Appl Environ Microbiol 2010; 64:890-5. [PMID: 16349528 PMCID: PMC106342 DOI: 10.1128/aem.64.3.890-895.1998] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Chitosan-degrading activities induced by glucosamine (GlcN) or N-acetylglucosamine (GlcNAc) were found in a culture filtrate of Trichoderma reesei PC-3-7. One of the chitosan-degrading enzymes was purified to homogeneity by precipitation with ammonium sulfate followed by anion-exchange and hydrophobic-interaction chromatographies. The enzyme was monomeric, and its molecular mass was 93 kDa. The optimum pH and temperature of the enzyme were 4.0 and 50 degrees C, respectively. The activity was stable in the pH range 6.0 to 9.0 and at a temperature below 50 degrees C. Reaction product analysis from the viscosimetric assay and thin-layer chromatography and H nuclear magnetic resonance spectroscopy clearly indicated that the enzyme was an exo-type chitosanase, exo-beta-d-glucosaminidase, that releases GlcN from the nonreducing end of the chitosan chain. H nuclear magnetic resonance spectroscopy also showed that the exo-beta-d-glucosaminidase produced a beta-form of GlcN, demonstrating that the enzyme is a retaining glycanase. Time-dependent liberation of the reducing sugar from partially acetylated chitosan with exo-beta-d-glucosaminidase and the partially purified exo-beta-d-N-acetylglucosaminidase from T. reesei PC-3-7 suggested that the exo-beta-d-glucosaminidase cleaves the glycosidic link of either GlcN-beta(1-->4)-GlcN or GlcN-beta(1-->4)-GlcNAc.
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Affiliation(s)
- M Nogawa
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-21, Japan
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Hisaoka T, Nakamura Y, Senba E, Morikawa Y. The forkhead transcription factors, Foxp1 and Foxp2, identify different subpopulations of projection neurons in the mouse cerebral cortex. Neuroscience 2010; 166:551-63. [DOI: 10.1016/j.neuroscience.2009.12.055] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Revised: 12/19/2009] [Accepted: 12/23/2009] [Indexed: 01/31/2023]
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Hirabayashi T, Morikawa Y, Matsufuji H, Hoshino K, Hagane K, Ozaki K. Stimulatory action of mitemcinal (GM-611), an acid-resistant non-peptide motilin receptor agonist, on colonic motor activity and defecation: spontaneous and mitemcinal-induced giant migrating contractions during defecation in dogs. Neurogastroenterol Motil 2009; 21:1085-e91. [PMID: 19508333 DOI: 10.1111/j.1365-2982.2009.01341.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The aim of this study was to characterize giant migrating contractions (GMCs) during spontaneous defecation in dogs and to investigate the effect of mitemcinal (an orally active and highly acid-resistant motilin receptor agonist) on colonic motility to assess the possibility of using it for the treatment of colonic motility disorders. To assess colonic motility, strain-gauge force transducers were implanted on the gastrointestinal tract of five dogs, and the behaviour of the dogs was monitored with a noctovision-video camera system. The effect of mitemcinal (0, 3, 10 or 30 mg per dog) and sennoside (300 mg per dog) on colonic motility was assessed 24 h after oral administration. During a 39-day period, the starting point of most of the 140 GMCs was between the transverse colon and the descending colon, but some variation was observed. In the daytime, the GMCs originated from somewhat more proximal positions than at night. Mitemcinal caused an increase in the GMC-index (integration of contractile amplitude and duration) and proximal translocation of the GMC starting point, but did not cause an increase in the number of defecations 12 h after administration. Sennoside, however, caused a significant increase in the number of defecations, an increase in the GMC-index, and prolongation of the duration of GMCs. The GMC starting point in the canine colon varied during spontaneous defecation. Mitemcinal was a potent prokinetic drug to mimic a spontaneous defecation compared with sennoside. Mitemcinal evacuates more intestinal luminal contents during the defecation than does sennoside.
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Affiliation(s)
- T Hirabayashi
- Pediatric Surgery, St Luke's International Hospital, Tokyo, Japan.
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Sakurai M, Miura K, Takamura T, Ishizaki M, Morikawa Y, Nakamura K, Yoshita K, Kido T, Naruse Y, Kaneko S, Nakagawa H. J-shaped relationship between waist circumference and subsequent risk for Type 2 diabetes: an 8-year follow-up of relatively lean Japanese individuals. Diabet Med 2009; 26:753-9. [PMID: 19709143 DOI: 10.1111/j.1464-5491.2009.02773.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AIMS This study investigated the relationship between waist circumference and the subsequent incidence of Type 2 diabetes and the association with insulin resistance and pancreatic B-cell function in relatively lean Japanese individuals. METHODS The study participants were 3992 employees (2533 men and 1459 women, aged 35-55 years) of a metal-products factory in Japan. The incidence of diabetes was determined in annual medical examinations during an 8-year follow-up. We calculated age- and sex-adjusted hazard ratios (HRs) according to the sex-specific quintile of waist circumference at baseline. Differences in baseline insulin resistance [homeostatis model assessment (HOMA)-IR] and pancreatic B-cell function (HOMA-B) were compared between participants who developed diabetes and those who did not. RESULTS During the follow-up, 218 participants developed diabetes. Age- and sex-adjusted HRs across the quintiles of waist circumference were 1.78, 1.00 (reference), 1.59, 3.11 and 3.30, respectively (P for trend, < 0.0001). The HR for the lowest quintile was significantly higher than that for the second quintile. Among participants with waist circumference of the lowest quintile, HOMA-B was lower in those who developed diabetes than in those who did not [33.1 (24.1-45.0) vs. 54.3 (37.9-74.6) median (interquartile range), P < 0.0001], but HOMA-IR did not differ between these groups. CONCLUSIONS There was a J-shaped relationship between waist circumference and subsequent risk for Type 2 diabetes in relatively lean Japanese individuals; lower pancreatic B-cell function may also increase the risk of diabetes in very lean Japanese people. Diabet. Med. 26, 753-759 (2009).
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Affiliation(s)
- M Sakurai
- Department of Epidemiology and Public Health, Kanazawa Medical University, Ishikawa, Japan.
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Morikawa Y, Hisaoka T, Senba E. Characterization of Foxp2-expressing cells in the developing spinal cord. Neuroscience 2009; 162:1150-62. [PMID: 19463901 DOI: 10.1016/j.neuroscience.2009.05.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 05/10/2009] [Accepted: 05/12/2009] [Indexed: 02/03/2023]
Abstract
Two members of winged-helix/forkhead transcription factors, Foxp1 and Foxp2, are expressed in the developing and adult CNS, including the striatum, cerebral cortex, and thalamus. In a previous study, we have demonstrated that Foxp1 is expressed in a subpopulation of V1 interneurons in addition to motor neurons of the spinal cord during mouse embryogenesis. However, the detailed expression pattern of Foxp2 and its relationship with Foxp1 in the developing spinal cord remains to be elucidated. To shed light on the potential roles of Foxp1 and Foxp2 in the developing spinal cord, we characterized Foxp2-expressing cells during mouse embryogenesis. At embryonic day (E) 11.0, Foxp2-expressing cells were first observed in the ventral spinal cord, which were Pax6(-), p27(+), and neuron-specific class III beta-tubulin(+) postmitotic neurons. Between E13.5 and E15.5, high expression of Foxp2 was observed in both medial and lateral parts of the ventral spinal cord. Double-immunofluorescence staining for Foxp2 with some homeodomain transcription factors revealed that Foxp2-expressing neurons were Pax2(+), En1(+), Evx1(-), Chx10(-), Gata3(-), and Lhx3(-) V1 interneurons in the intermediate zone throughout the ventral spinal cord, indicating that Foxp2-expressing neurons were also V1 interneurons with the same phenotypes as Foxp1-expressing interneurons. In addition, neither Foxp1 nor Foxp2 was expressed in ventral calbindin(+) Renshaw cells. However, Foxp2 did not colocalize with Foxp1 in interneurons of the ventral spinal cord. These findings suggest that Foxp1 and Foxp2 are expressed in the distinct subsets of V1 interneurons that belong to non-Renshaw cells in the ventral spinal cord during embryogenesis. Thus, Foxp1 and Foxp2 may be involved in the determination of the cell type identities during late embryogenesis: the classes of neurotransmitters and the functional subtypes of non-Renshaw cells, such as Ia and Ib inhibitory interneurons.
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Affiliation(s)
- Y Morikawa
- Department of Anatomy and Neurobiology, Wakayama Medical University, 811-1, Kimiidera, Wakayama 641-8509, Japan.
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Sugahara M, Asada Y, Morikawa Y, Kageyama Y, Kunishima N. Nucleant-mediated protein crystallization with microporous zeolite showing heteroepitaxial growth. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092465] [Citation(s) in RCA: 3] [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] [Indexed: 11/11/2022] Open
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Masaki Y, Dong L, Kurose N, Kitagawa K, Morikawa Y, Yamamoto M, Takahashi H, Shinomura Y, Imai K, Saeki T, Azumi A, Nakada S, Sugiyama E, Matsui S, Origuchi T, Nishiyama S, Nishimori I, Nojima T, Yamada K, Kawano M, Zen Y, Kaneko M, Miyazaki K, Tsubota K, Eguchi K, Tomoda K, Sawaki T, Kawanami T, Tanaka M, Fukushima T, Sugai S, Umehara H. Proposal for a new clinical entity, IgG4-positive multiorgan lymphoproliferative syndrome: analysis of 64 cases of IgG4-related disorders. Ann Rheum Dis 2008; 68:1310-5. [PMID: 18701557 DOI: 10.1136/ard.2008.089169] [Citation(s) in RCA: 397] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Mikulicz's disease (MD) has been considered as one manifestation of Sjögren's syndrome (SS). Recently, it has also been considered as an IgG(4)-related disorder. OBJECTIVE To determine the differences between IgG(4)-related disorders including MD and SS. METHODS A study was undertaken to investigate patients with MD and IgG(4)-related disorders registered in Japan and to set up provisional criteria for the new clinical entity IgG(4)-positive multiorgan lymphoproliferative syndrome (IgG(4)+MOLPS). The preliminary diagnostic criteria include raised serum levels of IgG(4) (>135 mg/dl) and infiltration of IgG(4)(+) plasma cells in the tissue (IgG(4)+/IgG+ plasma cells >50%) with fibrosis or sclerosis. The clinical features, laboratory data and pathologies of 64 patients with IgG(4)+MOLPS and 31 patients with typical SS were compared. RESULTS The incidence of xerostomia, xerophthalmia and arthralgia, rheumatoid factor and antinuclear, antiSS-A/Ro and antiSS-B/La antibodies was significantly lower in patients with IgG(4)+MOLPS than in those with typical SS. Allergic rhinitis and autoimmune pancreatitis were significantly more frequent and total IgG, IgG(2), IgG(4) and IgE levels were significantly increased in IgG(4)+MOLPS. Histological specimens from patients with IgG(4)+MOLPS revealed marked IgG(4)+ plasma cell infiltration. Many patients with IgG(4)+MOLPS had lymphocytic follicle formation, but lymphoepithelial lesions were rare. Few IgG(4)+ cells were seen in the tissue of patients with typical SS. Thirty-eight patients with IgG(4)+MOLPS treated with glucocorticoids showed marked clinical improvement. CONCLUSION Despite similarities in the involved organs, there are considerable clinical and pathological differences between IgG(4)+MOLPS and SS. Based on the clinical features and good response to glucocorticoids, we propose a new clinical entity: IgG(4)+MOLPS.
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Affiliation(s)
- Y Masaki
- Department of Hematology and Immunology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku-gun, Ishikawa, 920-0293, Japan.
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Kumagai T, Kaizu M, Hatta S, Okuyama H, Aruga T, Hamada I, Morikawa Y. Direct observation of hydrogen-bond exchange within a single water dimer. Phys Rev Lett 2008; 100:166101. [PMID: 18518225 DOI: 10.1103/physrevlett.100.166101] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2008] [Indexed: 05/26/2023]
Abstract
The dynamics of water dimers was investigated at the single-molecule level by using a scanning tunneling microscope. The two molecules in a water dimer, bound on a Cu(110) surface at 6 K, were observed to exchange their roles as hydrogen-bond donor and acceptor via hydrogen-bond rearrangement. The interchange rate is approximately 60 times higher for (H2O)2 than for (D2O)2, suggesting that quantum tunneling is involved in the process. The interchange rate is enhanced upon excitation of the intermolecular mode that correlates with the reaction coordinate.
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Affiliation(s)
- T Kumagai
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Okazaki-Maeda K, Yamakawa S, Morikawa Y, Akita T, Tanaka S, Hyodo S, Kohyama M. Simulation of growth process of Pt-particles - first-principles calculations. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/100/7/072044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Watanabe T, Hoshino K, Tanabe M, Morikawa Y, Kawachi S, Wakabayashi G, Shimazu M, Kitajima M. Correlation of motility and neuronal integrity with a focus on the grade of intestinal allograft rejection. Am J Transplant 2008; 8:529-36. [PMID: 18294149 DOI: 10.1111/j.1600-6143.2007.02115.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Intestinal graft motility after small bowel transplantation (SBT) is poorly characterized. The aim of this study was to compare motor patterns with myenteric neuronal cell population as a parameter of graft viability at various degrees of acute cellular rejection (ACR). Three grades of ACR were achieved in orthotopic allografts. Syngeneic transplants and allografts with immunosuppression served as controls. Motor activities were recorded using strain gauge force transducers and analyzed visually. Quantifications of myenteric neurons in whole mounts of intestinal grafts were used to evaluate neuronal population. A typical migrating motor complex (MMC) was found in syngeneic and allogenic transplants with immunosuppression. A high prevalence of discrete clustered contractions (DCC) and nonpropagating contractions (NPC) without MMC was seen in moderately and severely rejected allografts. Neuronal cell loss in the allografts, which could be one of the causes of motor dysfunction, was noted in moderate rejection (19.3%) and progressed until severe rejection (60.1%). Monitoring motility patterns in SBT could be an effective tool for assessing intestinal rejection. Allograft dysmotility, such as absence of MMC and high prevalence of DCC or NPC, could be useful markers of progression of acute rejection and help guide treatment decisions.
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Affiliation(s)
- T Watanabe
- Department of Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
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Suwazono Y, Kobayashi E, Dochi M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. Combination of the C1429T polymorphism in the G-protein beta-3 subunit gene and the A1330V polymorphism in the low-density lipoprotein receptor-related protein 5 gene is a risk factor for hypercholesterolaemia. Clin Exp Med 2007; 7:108-14. [DOI: 10.1007/s10238-007-0131-1] [Citation(s) in RCA: 5] [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] [Received: 07/24/2006] [Accepted: 06/12/2007] [Indexed: 10/22/2022]
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Hasegawa Y, Kawachi S, Shimazu M, Hoshino K, Tanabe M, Fuchimoto Y, Obara H, Shinoda M, Shimizu H, Yamada Y, Akatsu T, Irie R, Sakamoto M, Morikawa Y, Kitajima M. Discontinuation of living donor liver transplantation for PSC due to histological abnormalities in intraoperative donor liver biopsy. Am J Transplant 2007; 7:2204-7. [PMID: 17614979 DOI: 10.1111/j.1600-6143.2007.01898.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Liver transplantation is the only curative treatment known to date for end-stage liver disease occurring as a result of primary sclerosing cholangitis (PSC). Here, we report a case in which living donor liver transplantation (LDLT) for PSC was cancelled because of histological abnormalities in intraoperative biopsy of the donor liver. The donor was the mother of the recipient, and her preoperative evaluation revealed no abnormalities. In the donor operation, the donor liver biopsy revealed expansion of the portal zone with lymphocytic infiltration and dense concentric fibrosis developed around a bile duct. These histological findings were identical to those of early-stage PSC; therefore, the LDLT was called off. The experience in this case suggests that preoperative liver biopsy may be useful to exclude first-degree relative donors with potential PSC prior to LDLT for PSC.
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Affiliation(s)
- Y Hasegawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
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Suwazono Y, Kobayashi E, Uetani M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. G-protein beta3 subunit variant C825T is a risk factor for hypertension in Japanese females--a prospective cohort study over 5 years. Ann Hum Genet 2006; 70:767-77. [PMID: 17044851 DOI: 10.1111/j.1469-1809.2006.00284.x] [Citation(s) in RCA: 5] [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: 12/30/2022]
Abstract
The relationship between the G-protein beta3 subunit variant C825T and risk of hypertension was examined in a prospective cohort study of Japanese workers. This study included observations over a 5-year period from 1997 to 2002 on 878 males and 692 females who were normotensive at entry. Hypertension was defined as systolic blood pressure > or =140 mmHg and/or diastolic blood pressure > or =90 mmHg, or taking antihypertensive medication. Pooled logistic regression analyses were performed using C825T genotype, age, body mass index, lifestyle, and the result of blood chemistries as the covariates. Multivariate pooled logistic regression analysis showed the risk of hypertension was 2.31 times higher in females with the TT genotype than in females with the CC genotype (95% confidence interval: 1.07-4.96), after adjustment for the effects of other potential covariates. In contrast, no significant risk of hypertension was observed with the TT genotype in male subjects. This study indicates that the 825T allele is an independent risk factor for hypertension in Japanese females, and suggests that this polymorphism may be a beneficial prognostic marker for hypertension in the general Japanese female population.
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Affiliation(s)
- Y Suwazono
- Department of Occupational and Environmental Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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Morikawa Y, Cserjesi P. [P30]: The roles of BMP and bHLH transcription factors in sympathetic nervous system development. Int J Dev Neurosci 2006. [DOI: 10.1016/j.ijdevneu.2006.09.094] [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: 10/23/2022] Open
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Bando T, Morikawa Y, Komori T, Senba E. Complete overlap of interleukin-31 receptor A and oncostatin M receptor beta in the adult dorsal root ganglia with distinct developmental expression patterns. Neuroscience 2006; 142:1263-71. [PMID: 16926070 DOI: 10.1016/j.neuroscience.2006.07.009] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2006] [Revised: 06/30/2006] [Accepted: 07/11/2006] [Indexed: 12/27/2022]
Abstract
Interleukin-31 receptor A (IL-31RA) is a newly identified type I cytokine receptor, that is related to gp130, the common receptor of the interleukin (IL) -6 family cytokines. Recent studies have shown that IL-31RA forms a functional receptor complex for IL-31 together with the beta subunit of oncostatin M receptor (OSMRbeta). However, little is known about the target cells of IL-31 because it remains unclear which types of cells express IL-31RA. In our previous reports, we demonstrated that OSMRbeta is expressed in a subset of small-sized nociceptive neurons of adult dorsal root ganglia (DRGs). In the present study, we investigated the IL-31RA expression in the adult and developing DRGs. From a northern blot analysis and in situ hybridization histochemistry, IL-31RA mRNA was found to be expressed in the adult DRGs. According to reverse-transcriptase polymerase chain reaction, IL-31RA mRNA was detected in the DRGs and trigeminal ganglia, while no expression of IL-31RA mRNA was observed in the CNS. Double immunofluorescence staining revealed IL-31RA to be expressed in a subset of small-sized neurons, all of which colocalized with OSMRbeta. In addition, the expression of IL-31 RA was detected in afferent fibers in the spinal cord and the dermis of the skin. We also found that the developmental expression pattern of IL-31RA was different from that of OSMRbeta; IL31RA-positive neurons in DRGs first appeared at postnatal day (PN) 10 and reached the adult level at PN14, whereas OSMRbeta-positive neurons were observed at PN0 for the first time. We previously demonstrated OSMRbeta-expressing neurons to decrease, however, they were not found to disappear in oncostatin M (OSM) -deficient mice. These findings suggest that IL-31 and OSM may thus have redundant functions in the development of OSMRbeta-expressing neurons.
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MESH Headings
- Aging/physiology
- Animals
- Animals, Newborn
- Fluorescent Antibody Technique
- Ganglia, Spinal/cytology
- Ganglia, Spinal/growth & development
- Ganglia, Spinal/metabolism
- Gene Expression Regulation, Developmental/physiology
- Male
- Mice
- Mice, Inbred C57BL
- Neurons, Afferent/cytology
- Neurons, Afferent/metabolism
- Nociceptors/cytology
- Nociceptors/metabolism
- Oncostatin M Receptor beta Subunit/genetics
- Oncostatin M Receptor beta Subunit/metabolism
- RNA, Messenger/metabolism
- Receptors, Interleukin/genetics
- Receptors, Interleukin/metabolism
- Skin/innervation
- Trigeminal Ganglion/cytology
- Trigeminal Ganglion/growth & development
- Trigeminal Ganglion/metabolism
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Affiliation(s)
- T Bando
- Department of Anatomy and Neurobiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama 641-8509, Japan
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Nishijo M, Morikawa Y, Nakagawa H, Tawara K, Miura K, Kido T, Ikawa A, Kobayashi E, Nogawa K. Causes of death and renal tubular dysfunction in residents exposed to cadmium in the environment. Occup Environ Med 2006; 63:545-50. [PMID: 16601012 PMCID: PMC2078124 DOI: 10.1136/oem.2006.026591] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2006] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To clarify the causes of death of residents with renal tubular dysfunction induced by cadmium (Cd) in the environment. METHODS A 15 year follow up study was performed with the inhabitants living in the Cd polluted Kakehashi River basin in Japan. Standardised mortality ratios (SMRs) for causes of death, classified by ICD-9, were computed using the person-years method to investigate the excess mortality of subjects with urinary beta2-MG (microglobulin) > or =1000 microg/gCr. Mortality risk analysis was performed using Cox's proportional model to compare mortality between subjects with urinary beta2-MG > or =1000 and <1000 microg/gCr, and to investigate the relationship between the degree of urinary beta2-MG and mortality. RESULTS Excess mortality due to heart failure and cerebral infarction in both sexes, and nephritis and nephrosis in men, was observed among subjects with urinary beta2-MG > or =1000 microg/gCr. Significant increases in mortality risk for cerebral infarction in men and for malignant neoplasms in women with urinary beta2-MG > or =1000 microg/gCr were observed during the first five year observation period. For nephritis and nephrosis, the mortality risks for men and women with urinary beta2-MG > or =1000 microg/gCr significantly increased over the 15 year observation period. The mortality risks for heart failure and cerebral infarction increased in proportion to the increased urinary beta2-MG in both sexes. Increased mortality risks for nephritis and nephrosis were identified in the subjects with urinary beta2-MG > or =10000 microg/gCr in both sexes. CONCLUSION Renal tubular dysfunction induced by Cd affected the causes of death, and mortality for heart failure, cerebral infarction, and nephritis and nephrosis was increased among inhabitants living in a Cd polluted area in Japan. In women, cancer mortality may have been increased while Cd pollution was ongoing.
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Affiliation(s)
- M Nishijo
- Department of Public Health, Kanazawa Medical University, Uchinada, Ishikawa, Japan.
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Ogasawara W, Shida Y, Furukawa T, Shimada R, Nakagawa S, Kawamura M, Yagyu T, Kosuge A, Xu J, Nogawa M, Okada H, Morikawa Y. Cloning, functional expression and promoter analysis of xylanase III gene from Trichoderma reesei. Appl Microbiol Biotechnol 2006; 72:995-1003. [PMID: 16520923 DOI: 10.1007/s00253-006-0365-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2005] [Revised: 01/25/2006] [Accepted: 02/05/2006] [Indexed: 11/29/2022]
Abstract
In this study, the xyn3 gene from the filamentous mesophilic fungus Trichoderma reesei (Hypocrea jecorina) PC-3-7 was cloned and sequenced. Analysis of the deduced amino acid sequence of XYN III revealed considerable homology with xylanases belonging to glycoside hydrolase family 10. These results show that XYN III is distinguishable from XYN I and XYN II, two other T. reesei xylanases that belong to the glycosidase family 11. When xyn3 was expressed in Escherichia coli, significant activity was observed in the cell-free extract, and higher activity (13.2 U/ml medium) was recovered from the inclusion bodies in the cell debris. The sequence of the 5'-upstream region of the gene in the parent strain QM9414 is identical to that of PC-3-7, although the expression level of xyn3 in PC-3-7 has been reported to be at least 1,000 times greater than in QM9414. These results suggest that xyn3 expression in T. reesei QM9414 is silenced. The consensus sequences for ACEI, ACEII, CREI, and the Hap2/3/5 protein complex are all present in the upstream region of xyn3. Deletion analysis of the upstream region revealed that two regions containing consensus sequences for the known regulatory elements play important roles for xyn3 expression.
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Affiliation(s)
- W Ogasawara
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188, Japan
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Komori T, Morikawa Y, Nanjo K, Senba E. Induction of brain-derived neurotrophic factor by leptin in the ventromedial hypothalamus. Neuroscience 2006; 139:1107-15. [PMID: 16564638 DOI: 10.1016/j.neuroscience.2005.12.066] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Revised: 10/30/2005] [Accepted: 12/07/2005] [Indexed: 01/19/2023]
Abstract
Leptin, an adipocyte-derived hormone, reduces food intake by regulating orexigenic and anorexigenic factors in the hypothalamus. Although brain-derived neurotrophic factor is an important anorexigenic factor in the hypothalamus, little is known about the regulation of brain-derived neurotrophic factor expression by leptin in the hypothalamus. In the present study, we examined the effect of leptin on the expression of brain-derived neurotrophic factor in the hypothalamus. I.V. administration of leptin (10 microg/g) led to the increase in the expression of brain-derived neurotrophic factor mRNA, which was observed in the dorsomedial part of the ventromedial hypothalamic nucleus. The increased expression of brain-derived neurotrophic factor mRNA was detected in phosphorylated signal transducer and activator of transcription 3-positive neurons, suggesting that leptin induced brain-derived neurotrophic factor expression in neurons of the dorsomedial part of the ventromedial hypothalamic nucleus. In addition, the expression of brain-derived neurotrophic factor was increased at the protein level in the ventromedial hypothalamic nucleus of leptin-injected mice. Interestingly, brain-derived neurotrophic factor-positive fibers also increased in the ventromedial hypothalamic nucleus and dorsomedial hypothalamic nucleus of leptin-injected mice, which were in close apposition to tyrosine kinase receptor B-immunoreactive neurons and colocalized with synaptophysin, a marker of presynaptic terminals. These results suggest that leptin induces brain-derived neurotrophic factor expression in the dorsomedial part of the ventromedial hypothalamic nucleus and brain-derived neurotrophic factor may exert as anorexigenic factors possibly through the activation of tyrosine kinase receptor B in the ventromedial hypothalamic nucleus and dorsomedial hypothalamic nucleus.
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Affiliation(s)
- T Komori
- Department of Anatomy and Neurobiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama 641-8509, Japan
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Tamura S, Morikawa Y, Senba E. TRPV2, a capsaicin receptor homologue, is expressed predominantly in the neurotrophin-3-dependent subpopulation of primary sensory neurons. Neuroscience 2005; 130:223-8. [PMID: 15561438 DOI: 10.1016/j.neuroscience.2004.09.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2004] [Indexed: 11/26/2022]
Abstract
TRPV2, a member of transient receptor potential ion channels, responds to high-threshold noxious heat, but neither to capsaicin nor to proton. Although TRPV2 is expressed in medium- to large-sized dorsal root ganglion (DRG) neurons with myelinated fibers in adult rodents, little is known about the neurotrophin dependence of TRPV2-positive neurons in the developing and adult DRGs of mice. In the present study, using immunohistochemistry, we found that TRPV2 was first expressed in DRG neurons at embryonic day (E) 11.5, when neither TRPV1 nor TRPM8 was detected yet. Double-immunofluorescence staining revealed that tyrosine kinase receptor C (TrkC) was expressed in most of TRPV2-positive DRG neurons at E11.5 and E13.5. In addition, the percentage of TRPV2-positive neurons in the total DRG neurons at E13.5 reached the same as that of adulthood. In adult DRGs, TrkC and Ret were expressed in 68% and 25% of TRPV2-positive neurons, respectively. These results suggest that TRPV2 is expressed predominantly in the NT-3-dependent subpopulation of DRG neurons throughout development and in adult mice.
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Affiliation(s)
- S Tamura
- Department of Anatomy and Neurobiology, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509 Japan
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Fujikawa Y, Nagao T, Yamada-Takamura Y, Sakurai T, Hashimoto T, Morikawa Y, Terakura K, Lagally MG. Hydrogen-induced instability of the Ge(105) surface. Phys Rev Lett 2005; 94:086105. [PMID: 15783909 DOI: 10.1103/physrevlett.94.086105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Indexed: 05/24/2023]
Abstract
The structure and stability of the hydrogen-terminated (105) surface of Ge deposited on Si(105) substrates are investigated by scanning tunneling microscopy (STM). Investigations combining STM, electron energy loss spectroscopy, and theory reveal that Si incorporation into the surface Ge layer of hydrogen-terminated Ge/Si(105) drastically destabilizes the surface. The STM images obtained on this surface are well explained by the recently established rebonded-step structure model.
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Affiliation(s)
- Yasunori Fujikawa
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Tamura S, Morikawa Y, Hisaoka T, Ueno H, Kitamura T, Senba E. Expression of mKirre, a mammalian homolog of Drosophila kirre, in the developing and adult mouse brain. Neuroscience 2005; 133:615-24. [PMID: 15908127 DOI: 10.1016/j.neuroscience.2005.03.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2005] [Revised: 03/15/2005] [Accepted: 03/25/2005] [Indexed: 12/01/2022]
Abstract
mKirre, a mammalian homolog of the Drosophila kirre, is expressed in bone marrow stromal cells and the brain. Although mKirre has been shown to support the hematopoietic stem cells, little is known about the function of mKirre in the brain. In the present study, to gain insights into the function of mKirre, we investigated the expression pattern of mKirre gene in the developing and adult mouse brain using in situ hybridization. In the adult brain, mKirre mRNA was highly expressed in the olfactory bulb, the piriform cortex, the cochlear nucleus, and the cerebellum. At embryonic day (E) 11.5, we could observe mKirre mRNA in the differentiating zones of various regions, such as the caudate-putamen, the geniculate body, the thalamus, the amygdala, and the brainstem. Its gene expression in these regions at E11.5 also persisted to the adult, in which its expression levels were much less prominent. After birth, we could first observe high expression of mKirre mRNA in the glomerular and mitral layers of the olfactory bulb, the cortical plate of the neocortex, the cochlear nucleus, and the molecular and granule cell layers of the cerebellum. In the hippocampus, its gene expression was first observed in the dentate gyrus at postnatal day 7. The spatiotemporal expression pattern of mKirre mRNA suggests important roles of mKirre in later developmental processes, especially the synapse formation.
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Affiliation(s)
- S Tamura
- Department of Anatomy and Neurobiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama 641-8509, Japan
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