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Morace A, Abe Y, Honrubia JJ, Iwata N, Arikawa Y, Nakata Y, Johzaki T, Yogo A, Sentoku Y, Mima K, Ma T, Mariscal D, Sakagami H, Norimatsu T, Tsubakimoto K, Kawanaka J, Tokita S, Miyanaga N, Shiraga H, Sakawa Y, Nakai M, Azechi H, Fujioka S, Kodama R. Super-strong magnetic field-dominated ion beam dynamics in focusing plasma devices. Sci Rep 2022; 12:6876. [PMID: 35477961 PMCID: PMC9046386 DOI: 10.1038/s41598-022-10829-1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
High energy density physics is the field of physics dedicated to the study of matter and plasmas in extreme conditions of temperature, densities and pressures. It encompasses multiple disciplines such as material science, planetary science, laboratory and astrophysical plasma science. For the latter, high energy density states can be accompanied by extreme radiation environments and super-strong magnetic fields. The creation of high energy density states in the laboratory consists in concentrating/depositing large amounts of energy in a reduced mass, typically solid material sample or dense plasma, over a time shorter than the typical timescales of heat conduction and hydrodynamic expansion. Laser-generated, high current–density ion beams constitute an important tool for the creation of high energy density states in the laboratory. Focusing plasma devices, such as cone-targets are necessary in order to focus and direct these intense beams towards the heating sample or dense plasma, while protecting the proton generation foil from the harsh environments typical of an integrated high-power laser experiment. A full understanding of the ion beam dynamics in focusing devices is therefore necessary in order to properly design and interpret the numerous experiments in the field. In this work, we report a detailed investigation of large-scale, kilojoule-class laser-generated ion beam dynamics in focusing devices and we demonstrate that high-brilliance ion beams compress magnetic fields to amplitudes exceeding tens of kilo-Tesla, which in turn play a dominant role in the focusing process, resulting either in a worsening or enhancement of focusing capabilities depending on the target geometry.
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Affiliation(s)
- A Morace
- Institute of Laser Engineering, Osaka University, Suita, Japan.
| | - Y Abe
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - J J Honrubia
- ETSI Aeronautica y del Espacio, Universidad Politecnica de Madrid, Madrid, Spain
| | - N Iwata
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Nakata
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - T Johzaki
- Hiroshima University, Hiroshima, Japan
| | - A Yogo
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Sentoku
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - K Mima
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, USA
| | - D Mariscal
- Lawrence Livermore National Laboratory, Livermore, USA
| | - H Sakagami
- National Institute of Fusion Science, Toki, Japan
| | - T Norimatsu
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - K Tsubakimoto
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - J Kawanaka
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - S Tokita
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - N Miyanaga
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - M Nakai
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - H Azechi
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, Suita, Japan
| | - R Kodama
- Institute of Laser Engineering, Osaka University, Suita, Japan
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Kurokawa R, Ota Y, Gonoi W, Hagiwara A, Kurokawa M, Mori H, Maeda E, Amemiya S, Usui Y, Sato N, Nakata Y, Moritani T, Abe O. MRI Findings of Immune Checkpoint Inhibitor-Induced Hypophysitis: Possible Association with Fibrosis. AJNR Am J Neuroradiol 2020; 41:1683-1689. [PMID: 32763900 PMCID: PMC7583108 DOI: 10.3174/ajnr.a6692] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 06/02/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND PURPOSE Hypophysitis is one of the well-known adverse effects of immune checkpoint inhibitors. Immune checkpoint inhibitor-induced hypophysitis frequently causes irreversible hypopituitarism, which requires long-term hormone replacement. Despite the high frequency and clinical significance, characteristic MR imaging findings of immune checkpoint inhibitor-induced hypophysitis have not been established. In the present study, we aimed to review and extract the MR imaging features of immune checkpoint inhibitor-induced hypophysitis. MATERIALS AND METHODS This retrospective international multicenter study comprised 20 patients with melanoma who were being treated with immune checkpoint inhibitors and clinically diagnosed with immune checkpoint inhibitor-induced hypophysitis. Three radiologists evaluated the following MR imaging findings: enlargement of the pituitary gland and stalk; homogeneity of enhancement of the pituitary gland; presence/absence of a well-defined poorly enhanced area and, if present, its location, shape, and signal intensity in T2WI; and enhancement pattern in contrast-enhanced dynamic MR imaging. Clinical symptoms and hormone levels were also recorded. RESULTS Enlargement of the pituitary gland and stalk was observed in 12 and 20 patients, respectively. Nineteen patients showed poorly enhanced lesions (geographic hypoenhancing lesions) in the anterior lobe, and 11 of these lesions showed hypointensity on T2WI. Thyrotropin deficiency and corticotropin deficiency were observed in 19/20 and 12/17 patients, respectively, which persisted in 12/19 and 10/12 patients, respectively, throughout the study period. CONCLUSIONS Pituitary geographic hypoenhancing lesions in the anterior lobe of the pituitary gland are characteristic and frequent MR imaging findings of immune checkpoint inhibitor-induced hypophysitis. They reflect fibrosis and are useful in distinguishing immune checkpoint inhibitor-induced hypophysitis from other types of hypophysitis/tumors.
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Affiliation(s)
- R Kurokawa
- From the Department of Radiology (R.K., W.G., E.M., S.A., Y.U., O.A.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Y Ota
- Division of Neuroradiology (Y.O., T.M.), Department of Radiology, Michigan Medicine, Ann Arbor, Michigan
| | - W Gonoi
- From the Department of Radiology (R.K., W.G., E.M., S.A., Y.U., O.A.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - A Hagiwara
- Department of Radiology (A.H.), Juntendo University School of Medicine, Tokyo, Japan
| | - M Kurokawa
- Department of Radiology (M.K.), Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
| | - H Mori
- Department of Radiology (H.M.), Jichi Medical University, Tochigi-ken, Japan
| | - E Maeda
- From the Department of Radiology (R.K., W.G., E.M., S.A., Y.U., O.A.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - S Amemiya
- From the Department of Radiology (R.K., W.G., E.M., S.A., Y.U., O.A.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Y Usui
- From the Department of Radiology (R.K., W.G., E.M., S.A., Y.U., O.A.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - N Sato
- Department of Radiology (N.S.), Tokyo Metropolitan Neurological Hospital, Tokyo, Japan
| | - Y Nakata
- Department of Radiology (Y.N.), National Center of Neurology and Psychiatry, Tokyo, Japan
| | - T Moritani
- Division of Neuroradiology (Y.O., T.M.), Department of Radiology, Michigan Medicine, Ann Arbor, Michigan
| | - O Abe
- From the Department of Radiology (R.K., W.G., E.M., S.A., Y.U., O.A.), Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Kobatake K, Ikeda K, Nakata Y, Yamasaki N, Hayashi T, Sentani K, Yasui W, Kaminuma O, Horie S, Black P, Matsubara A, Honda H. Kdm6a deficiency activates inflammatory pathways, promotes M2 macrophage polarization and causes bladder cancer with p53 dysfunction. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32616-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Hisatomi R, Noguchi A, Yamazaki R, Nakata Y, Gloppe A, Nakamura Y, Usami K. Helicity-Changing Brillouin Light Scattering by Magnons in a Ferromagnetic Crystal. Phys Rev Lett 2019; 123:207401. [PMID: 31809102 DOI: 10.1103/physrevlett.123.207401] [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: 05/10/2019] [Indexed: 06/10/2023]
Abstract
Brillouin light scattering in ferromagnetic materials usually involves one magnon and two photons and their total angular momentum is conserved. Here, we experimentally demonstrate the presence of a helicity-changing two-magnon Brillouin light scattering in a ferromagnetic crystal, which can be viewed as a four-wave mixing process involving two magnons and two photons. Moreover, we observe an unconventional helicity-changing one-magnon Brillouin light scattering, which apparently infringes the conservation law of the angular momentum. We show that the crystal angular momentum intervenes to compensate the missing angular momentum in the latter scattering process.
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Affiliation(s)
- R Hisatomi
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - A Noguchi
- Komaba Institute for Science (KIS), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - R Yamazaki
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Y Nakata
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - A Gloppe
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
| | - Y Nakamura
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
- Center for Emergent Matter Science (CEMS), RIKEN, Wako, Saitama 351-0198, Japan
| | - K Usami
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan
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Nakata Y, Furuya S, Shimizu H, Akaike H, Hosomura N, Kawaguchi Y, Amemiya H, Sudo M, Kawaida H, Inoue S, Kono H, Ichikawa D. MON-PO416: Effects of Preoperative Skeletal Muscle Mass and Neutrophil Lymphocyte Ratio on the Prognosis of Stage II and III Colorectal Cancer. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32249-6] [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: 10/26/2022]
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Furuya S, Ashizawa N, Nakata Y, Shimizu H, Akaike H, Hosomura N, Kawaguchi Y, Amemiya H, Sudo M, Kawaida H, Inoue S, Kono H, Ichikawa D. MON-PO398: Examination of Immune-Nutritional Index Before and After Surgery and Prognosis for Colon Cancer Patients: Possibility to Nutritional Precision Medicine. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32231-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sugaya K, Inoue T, Nakata Y, Isozaki E. Independent loss of melanin-containing neurons between the locus coeruleus and substantia nigra in Parkinson’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kono H, Fujii H, Suzuki-Inoue K, Inoue O, Furuya S, Hirayama K, Akazawa Y, Nakata Y, Sun C, Tsukiji N, Shirai T, Ozaki Y. The platelet-activating receptor C-type lectin receptor-2 plays an essential role in liver regeneration after partial hepatectomy in mice. J Thromb Haemost 2017; 15:998-1008. [PMID: 28294559 DOI: 10.1111/jth.13672] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 05/08/2015] [Indexed: 01/22/2023]
Abstract
Essentials Regeneration role of C-type lectin receptor-2 (CLEC-2) after 70% hepatectomy (HPx) was investigated. Wild-type or CLEC-2 deleted from platelets of chimeric mice (flKO) underwent HPx. The liver/body weight ratio was significantly lower in the flKO than in the wild-type. CLEC-2 plays an essential role in liver regeneration after HPx. SUMMARY Background and aim The aim of the present study was to investigate the role of C-type lectin receptor (CLEC)-2 in liver regeneration following partial liver resection in mice. Materials and methods Irradiated chimeric mice transplanted with fetal liver cells from wild-type (WT) mice, CLEC-2-deleted (KO) mice or mice with CLEC-2 deleted specifically from platelets (flKO) were generated. Mice underwent 70% partial hepatectomy (PH). Immunohistochemical staining was performed to investigate the expression of the endogenous ligand for CLEC-2, podoplanin. The accumulation of platelets in the liver was also quantified. The hepatic expression of the IL-6/gp130 and STAT3, Akt and ERK1/2 was also examined. Results The liver/body weight ratio and expression of all cell proliferation markers were significantly lower in the flKO group than in the WT group. The expression of phosphorylated (p) Akt and pERK1/2 was similar in the WT and flKO groups. On the other hand, the expression of pSTAT3 and IL-6 was significantly stronger in the WT group than in the flKO group. The expression of podoplanin was detected in the hepatic sinusoids of both groups. However, the extent to which platelets accumulated in hepatic sinusoids was significantly less in the flKO group than in the WT group. Conclusion CLEC-2 was involved in hepatic regeneration after liver resection and CLEC-2-related liver regeneration was attributed to the interaction between platelets and sinusoidal endothelial cells.
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Affiliation(s)
- H Kono
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - H Fujii
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - K Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - O Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - S Furuya
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - K Hirayama
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Y Akazawa
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Y Nakata
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - C Sun
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - N Tsukiji
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - T Shirai
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Y Ozaki
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
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Nakata Y, Watanabe Y, Narimatsu H, Yoshimura T, Otake H, Sawa T. Abstract PR476. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492862.79208.a0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Nakata Y, Sakurai T, Yamada I. Long-term Intraarterial Infusion Therapy with Prostaglandin E1 in Patients with Ischemic Ulcer of the Extremities. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/153857448802200303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
There is confusion about blood flow of the foot during intraarterial infusion of prostaglandin E 1. The authors studied blood flow in the dorsalis pedis arter ies of patients with ischemic ulcer during the infusion and report the results in this paper. Prostaglandin E1 was continuously infused intraarterially for a mean of 30.9 ±14.5 days in 17 lower extremities of 11 patients with intractable ischemic ulcers. Thirteen of the 17 cases responded to the treatment—especially the cases in which peripheral arteries near the foot joint were patent. In the dorsalis pedis artery, the blood flow increased by 266.3% during the arterial infusion, but no differences were seen in the peak frequency or the percent window denoting the degree of spectral broadening in the infused lower limb. On the other hand, there was no statistically significant difference between the blood flow, peak frequency, or percent window of the contralateral lower limb before, and those parameters during, the infusion. The authors observed complications in 9 of 17 cases, which necessitated the discontinuation of the infusion.
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Affiliation(s)
- Y. Nakata
- Cardiovascular Surgery, Aichi Prefectural Owari Hospital, Ichinomiya, Japan
| | - T. Sakurai
- Cardiovascular Surgery, Aichi Prefectural Owari Hospital, Ichinomiya, Japan
| | - I. Yamada
- Cardiovascular Surgery, Aichi Prefectural Owari Hospital, Ichinomiya, Japan
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Ueda T, Nakata Y, Yamasaki N, Oda H, Sentani K, Kanai A, Onishi N, Ikeda K, Sera Y, Honda ZI, Tanaka K, Sata M, Ogawa S, Yasui W, Saya H, Takita J, Honda H. ALKR1275Q perturbs extracellular matrix, enhances cell invasion and leads to the development of neuroblastoma in cooperation with MYCN. Oncogene 2016; 35:4447-58. [DOI: 10.1038/onc.2015.519] [Citation(s) in RCA: 18] [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: 06/09/2015] [Revised: 11/20/2015] [Accepted: 12/04/2015] [Indexed: 12/16/2022]
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Nakamura Y, Ando Y, Takagi Y, Murata M, Kozuka T, Nakata Y, Hasebe R, Takagi A, Matsushita T, Shima M, Kojima T. Distinct X chromosomal rearrangements in four haemophilia B patients with entire F9 deletion. Haemophilia 2015; 22:433-9. [PMID: 26686734 DOI: 10.1111/hae.12849] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 06/09/2015] [Accepted: 09/14/2015] [Indexed: 01/31/2023]
Abstract
INTRODUCTION Haemophilia B is an X-linked bleeding disorder caused by a coagulation factor IX gene (F9) abnormality. Numerous F9 defects have been identified to date; however, only a few with an entire F9 deletion have been reported in detail. AIM To elucidate the cause of severe haemophilia B, we investigated the precise X chromosome abnormalities in four Japanese patients who did not show all amplifications in F9-specific PCR. METHODS We analysed the patient's genomic DNA using Multiplex ligation-dependent probe amplification (MLPA). To assess the extent of any deletions, we further performed mapping PCRs, inverse PCRs or long-range PCRs and direct sequencing analyses of the X chromosome. RESULTS We detected entire F9 deletions in four haemophilia B patients and identified the precise deleted regions of the X chromosome including F9. Patient 1 had a 149-kb deletion with breakpoints 90-kb upstream and 30-kb downstream from F9. Patients 2 and 3 showed 273-kb and 1.19-Mb deletions respectively. Patient 4 had two deleted regions: a 1663-bp deletion 1.34-Mb upstream from F9 and a 7.2-Mb deletion including F9. These distinct breakpoints found in four different patients suggest that the mechanism of X chromosome deletion may be different between individuals. Non-allelic homologous recombination (NAHR), microhomology-mediated break-induced replication (MMBIR) or fork stalling and template switching (FoSTeS) may occur in respective X chromosomes of the four haemophilia B patients analysed. CONCLUSIONS We identified diverse X chromosomal rearrangements in four haemophilia B patients, which might be caused by distinct mechanisms of genomic rearrangement.
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Affiliation(s)
- Y Nakamura
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Ando
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Takagi
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Murata
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | - T Kozuka
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Nakata
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - R Hasebe
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - A Takagi
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Matsushita
- Department of Transfusion Medicine, Nagoya University Hospital, Nagoya, Japan
| | - M Shima
- Department of Paediatric, Nara Medical University, Nara, Japan
| | - T Kojima
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Sogabe N, Sawada SS, Lee IM, Kawakami R, Ishikawa-Takata K, Nakata Y, Mitomi M, Noguchi J, Tsukamoto K, Miyachi M, Blair SN. Weight change after 20 years of age and the incidence of dyslipidemia: a cohort study of Japanese male workers. J Public Health (Oxf) 2015. [PMID: 26199305 DOI: 10.1093/pubmed/fdv089] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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] Open
Abstract
BACKGROUND While heavier weight is known to increase the incidence of dyslipidemia, limited data are available on the relationship between weight gain and its development. METHODS A total of 2647 males were categorized into the following four groups according to the difference between their self-reported weight at 20 years of age and their measured weight in 1994-95: a loss of ≥5% (decrease), loss of <5% or gain of <5% (no change), gain of ≥5 to <15% (increase) and gain of ≥15% (sizable increase). They were followed up until their 2002-03 health examination. Using the 'no change' group as reference, the multivariable-adjusted odds ratio (adjusted for age, body mass index at 20 years of age, physical activity, smoking and alcohol intake) and 95% confidence interval (95% CI) for the incidence of dyslipidemia were determined using logistic regression models. RESULTS A total of 1342 participants developed dyslipidemia during the follow-up period. The 'increase' and 'sizable increase' groups had odds ratios for the incidence of dyslipidemia of 1.97 (95% CI, 1.59-2.45) and 2.68 (2.15-3.34), respectively, demonstrating that there was a significant dose-response association between weight gain since 20 years of age and the incidence of dyslipidemia (P < 0.001 for trend). CONCLUSION These results suggest that dyslipidemia could be prevented by avoiding weight gain in adulthood.
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Affiliation(s)
- N Sogabe
- Department of Health and Nutrition Sciences, Faculty of Human Health, Komazawa Women's University, Tokyo, Japan
| | - S S Sawada
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - I-M Lee
- Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
| | - R Kawakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan Graduate School of Sport Sciences, Waseda University, Saitama, Japan
| | - K Ishikawa-Takata
- Department of Nutritional Education, National Institute of Health and Nutrition, Tokyo, Japan
| | - Y Nakata
- Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - M Mitomi
- Department of Safety and Health, Tokyo Gas Co. Ltd., Tokyo, Japan
| | - J Noguchi
- Department of Safety and Health, Tokyo Gas Co. Ltd., Tokyo, Japan
| | - K Tsukamoto
- Department of Safety and Health, Tokyo Gas Co. Ltd., Tokyo, Japan
| | - M Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - S N Blair
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
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Hidaka T, Shimada A, Nakata Y, Kodama H, Kurihara H, Tokihiro T, Ihara S. Simple model of pH-induced protein denaturation. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 92:012709. [PMID: 26274205 DOI: 10.1103/physreve.92.012709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Indexed: 06/04/2023]
Abstract
The pH-induced conformational changes of proteins are systematically studied in the framework of a hydrophobic-polar (HP) model, in which proteins are dramatically simplified as chains of hydrophobic (H) and polar (P) beads on a lattice. We express the electrostatic interaction, the principal driving force of pH-induced unfolding that is not included in the conventional HP model, as the repulsive energy term between P monomers. As a result of the exact enumeration of all of the 14- to 18-mers, it is found that lowest-energy states in many sequences change from single "native" conformations to multiple sets of "denatured" conformations with an increase in the electrostatic repulsion. The switching of the lowest-energy states occurs in quite a similar way to real proteins: it is almost always between two states, while in a small fraction of ≥16-mers it is between three states. We also calculate the structural fluctuations for all of the denatured states and find that the denatured states contain a broad range of incompletely unfolded conformations, similar to "molten globule" states referred to in acid or alkaline denatured real proteins. These results show that the proposed model provides a simple physical picture of pH-induced protein denaturation.
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Affiliation(s)
- T Hidaka
- Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Hongo, Tokyo 113-0033, Japan
| | - A Shimada
- Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Hongo, Tokyo 113-0033, Japan
| | - Y Nakata
- Institute for Biology and Mathematics of Dynamic Cellular Processes (iBMath), The University of Tokyo, Komaba, Tokyo 153-8904, Japan
- Graduate School of Mathematical Sciences, The University of Tokyo, Komaba, Tokyo 153-8902, Japan
| | - H Kodama
- Institute for Biology and Mathematics of Dynamic Cellular Processes (iBMath), The University of Tokyo, Komaba, Tokyo 153-8904, Japan
- Graduate School of Mathematical Sciences, The University of Tokyo, Komaba, Tokyo 153-8902, Japan
| | - H Kurihara
- Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Hongo, Tokyo 113-0033, Japan
- Institute for Biology and Mathematics of Dynamic Cellular Processes (iBMath), The University of Tokyo, Komaba, Tokyo 153-8904, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Chiyoda-ku, Tokyo 102-0076, Japan
| | - T Tokihiro
- Institute for Biology and Mathematics of Dynamic Cellular Processes (iBMath), The University of Tokyo, Komaba, Tokyo 153-8904, Japan
- Graduate School of Mathematical Sciences, The University of Tokyo, Komaba, Tokyo 153-8902, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Chiyoda-ku, Tokyo 102-0076, Japan
| | - S Ihara
- Institute for Biology and Mathematics of Dynamic Cellular Processes (iBMath), The University of Tokyo, Komaba, Tokyo 153-8904, Japan
- Graduate School of Mathematical Sciences, The University of Tokyo, Komaba, Tokyo 153-8902, Japan
- Research Center for Advanced Science and Technology, The University of Tokyo, Komaba, Tokyo 153-8904, Japan
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Nagaoka T, Nakamura A, Yamazaki T, Nakata Y, Endo K, Sakaguchi T, Kawata N, Sota T. Hyperspectroscopic imager for baby fibers. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:218-21. [PMID: 25569936 DOI: 10.1109/embc.2014.6943568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hyperspectral imaging system for diagnosing digestive diseases was newly developed in order to obtain information on pathology beyond morphology of lesions. In order to guide light reflected from a lesion, a baby fiber, which can be inserted in a forceps channel of the electronic endoscope, was also developed. The performance of the system was evaluated by animal experiment. Obtained hyperspectral data were found to have sufficient quality endurable to practical use. Harmful phenomena to a living body were not observed within the experiment. It was considered from the animal experiment that the present system could be practically used for humans.
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Morioka N, Suekama K, Zhang FF, Kajitani N, Hisaoka-Nakashima K, Takebayashi M, Nakata Y. Amitriptyline up-regulates connexin43-gap junction in rat cultured cortical astrocytes via activation of the p38 and c-Fos/AP-1 signalling pathway. Br J Pharmacol 2014; 171:2854-67. [PMID: 24641259 DOI: 10.1111/bph.12614] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 01/09/2014] [Accepted: 01/25/2014] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND AND PURPOSE Intercellular communication via gap junctions, comprised of connexin (Cx) proteins, allow for communication between astrocytes, which in turn is crucial for maintaining CNS homeostasis. The expression of Cx43 is decreased in post-mortem brains from patients with major depression. A potentially novel mechanism of tricyclic antidepressants is to increase the expression and functioning of gap junctions in astrocytes. EXPERIMENTAL APPROACH The effect of amitriptyline on the expression of Cx43 and gap junction intercellular communication (GJIC) in rat primary cultured cortical astrocytes was investigated. We also investigated the role of p38 MAPK intracellular signalling pathway in the amitriptyline-induced expression of Cx43 and GJIC. KEY RESULTS Treatment with amitriptyline for 48 h significantly up-regulated Cx43 mRNA, protein and GJIC. The up-regulation of Cx43 was not monoamine-related since noradrenaline, 5-HT and dopamine did not induce Cx43 expression and pretreatment with α- and β-adrenoceptor antagonists had no effect. Intracellular signalling involved p38 MAPK, as amitriptyline significantly increased p38 MAPK phosphorylation and Cx43 expression and GJIC were significantly blocked by the p38 inhibitor SB 202190. Furthermore, amitriptyline-induced Cx43 expression and GJIC were markedly reduced by transcription factor AP-1 inhibitors (curcumin and tanshinone IIA). The translocation of c-Fos from the cytosol and the nucleus of cortical astrocytes was increased by amitriptyline, and this response was dependent on p38 activity. CONCLUSION AND IMPLICATION These findings indicate a novel mechanism of action of amitriptyline through cortical astrocytes, and further suggest that targeting this mechanism could lead to the development of a new class of antidepressants.
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Affiliation(s)
- N Morioka
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, Minami-ku, Hiroshima, Japan
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Nakata Y, Tadaki T, Tanaka A, Shimizu K. Effect of Heat Treatments on Morphology and Transformation Temperatures of Sputtered Ti-Ni Thin Films. ACTA ACUST UNITED AC 2014. [DOI: 10.1051/jp4/199558671] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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18
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Kichikawa T, Muramatsu H, Takahashi N, Urushiyama Y, Sato Y, Takizawa Y, Nakata Y, Sato S, Ikeda H, Kobayashi D, Ito S, Miyagawa Y, Abe A, Ishikawa H, Murasawa A, Nakazono K. AB1151-HPR Can the Understanding of Disease Activity Score by Patients Lead to Better Satisfactions of the Rheumatoid Arthritis Treatment? Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3542] [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: 11/04/2022]
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19
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Morioka N, Tokuhara M, Nakamura Y, Idenoshita Y, Harano S, Zhang FF, Hisaoka-Nakashima K, Nakata Y. Primary cultures of rat cortical microglia treated with nicotine increases in the expression of excitatory amino acid transporter 1 (GLAST) via the activation of the α7 nicotinic acetylcholine receptor. Neuroscience 2013; 258:374-84. [PMID: 24300109 DOI: 10.1016/j.neuroscience.2013.11.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 11/22/2013] [Accepted: 11/23/2013] [Indexed: 10/25/2022]
Abstract
Although the clearance of glutamate from the synapse under physiological conditions is performed by astrocytic glutamate transporters, their expression might be diminished under pathological conditions. Microglia glutamate transporters, however, might serve as a back-up system when astrocytic glutamate uptake is impaired, and could have a prominent neuroprotective function under pathological conditions. In the current study, the effect of nicotine, well known as a neuroprotective molecule, on the function of glutamate transporters in cultured rat cortical microglia was examined. Reverse transcription polymerase chain reaction and pharmacological approaches demonstrated that, glutamate/aspartate transporter (GLAST), not glutamate transporter 1 (GLT-1), is the major functional glutamate transporter in cultured cortical microglia. Furthermore, the α7 subunit was demonstrated to be the key subunit comprising nicotinic acetylcholine (nACh) receptors in these cells. Treatment of cortical microglia with nicotine led to a significant increase of GLAST mRNA expression and (14)C-glutamate uptake in a concentration- and time-dependent manner, which were markedly inhibited by pretreatment with methyllycaconitine, a selective α7 nACh receptor antagonist. The nicotine-induced expression of GLAST mRNA and protein is mediated through an inositol trisphosphate (IP3) and Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) depend intracellular pathway, since pretreatment with either xestospongin C, an IP3 receptor antagonist, or KN-93, a CaMKII inhibitor, blocked GLAST expression. Together, these findings indicate that activation of nACh receptors, specifically those expressing the α7 subunit, on cortical microglia could be a key mechanism of the neuroprotective effect of nACh receptor ligands such as nicotine.
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Affiliation(s)
- N Morioka
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
| | - M Tokuhara
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Y Nakamura
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Y Idenoshita
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - S Harano
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - F F Zhang
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - K Hisaoka-Nakashima
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Y Nakata
- Department of Pharmacology, Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
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Shiraga H, Fujioka S, Nakai M, Watari T, Nakamura H, Arikawa Y, Hosoda H, Nagai T, Koga M, Kikuchi H, Ishii Y, Sogo T, Shigemori K, Nishimura H, Zhang Z, Tanabe M, Ohira S, Fujii Y, Namimoto T, Sakawa Y, Maegawa O, Ozaki T, Tanaka K, Habara H, Iwawaki T, Shimada K, Key M, Norreys P, Pasley J, Nagatomo H, Johzaki T, Sunahara A, Murakami M, Sakagami H, Taguchi T, Norimatsu T, Homma H, Fujimoto Y, Iwamoto A, Miyanaga N, Kawanaka J, Kanabe T, Jitsuno T, Nakata Y, Tsubakimoto K, Sueda K, Kodama R, Kondo K, Morio N, Matsuo S, Kawasaki T, Sawai K, Tsuji K, Murakami H, Sarukura N, Shimizu T, Mima K, Azechi H. Implosion and heating experiments of fast ignition targets by Gekko-XII and LFEX lasers. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135901008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Komori K, Mukai M, Ishitoko C, Sugitani K, Nakata Y, Tei G, Masu Y, Shioyama W, Awata N, Hori M. Relationship Between Hypertension and Proteinuria Associated with Bevacizumab : Retrospective Study on Cardiac Toxicity. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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22
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Nakata Y, Yasuda T, Mochizuki H. Recent progress in gene therapy for Parkinson's disease. Curr Mol Med 2013; 12:1311-8. [PMID: 22834832 DOI: 10.2174/156652412803833580] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 04/30/2012] [Accepted: 05/01/2012] [Indexed: 11/22/2022]
Abstract
Parkinson's disease (PD) is an age-related and the second most common neurodegenerative disorder beyond Alzheimer's disease. A neuropathological hallmark of PD is a prominent loss of dopaminergic neurons in the substantia nigra projecting into the caudate and putamen. Oral administration of L-dopa and/or dopamine agonists ameliorates cardinal motor symptoms of PD. However, an intermittent and long-term treatment with L-dopa frequently induces adverse side effects such as motor fluctuations and dyskinesia. As alternative therapeutic strategies, the following four approaches are currently under evaluation for clinical gene therapy trials in PD; 1) recombinant adeno-associated virus 2 system encoding aromatic L-amino acid decarboxylase (AADC), 2) glutamic acid decarboxylase (GAD) and 3) Neurturin, and 4) equine infectious anemia virus-based lentiviral system encoding AADC, tyrosine hydroxylase (TH) and GTP cyclohydrolase I (GCH) in a single transcriptional unit. GAD and Neurturin have been assessed in double blind placebocontrolled phase II studies; GAD showed a significant improvement in motor function, and Neurturin, although it failed to show significant effects at 12 months post-treatment, exhibited promising outcomes in additional examinations at 18 months. The other two approaches also represented significant effects in phase I or I/II studies. Adverse side effects due to surgery have not been observed. Here, we review preclinical and clinical trials encouraging further investigations of curative treatment for the patients suffering from PD.
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Affiliation(s)
- Y Nakata
- Division of Neuroregenerative Medicine, Kitasato University School of Medicine, Japan
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Kamiya K, Sato N, Nakata Y, Ito K, Kimura Y, Ota M, Takahashi A, Mori H, Kunimatsu A, Ohtomo K. Postoperative transient reduced diffusion in the ipsilateral striatum and thalamus. AJNR Am J Neuroradiol 2012; 34:524-32. [PMID: 22899787 DOI: 10.3174/ajnr.a3242] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND PURPOSE Restriction of diffusion has been reported in the early phase of secondary neuronal degeneration, such as wallerian degeneration. The purpose of this study was to investigate postoperative transient reduced diffusion in the ipsilateral striatum and thalamus as a remote effect of surgery. MATERIALS AND METHODS Six hundred two postoperative MR imaging examinations in 125 patients after cerebral surgery were retrospectively reviewed, focusing on the presence of reduced diffusion in the striatum and/or thalamus. The distribution of reduced diffusion in the striatum was classified into 3 groups: anterior, central, and posterior. Reduced diffusion in the thalamus was also classified on the basis of the anatomic locations of the thalamic nuclei. Further follow-up MRI was available in all patients with postoperative reduced diffusion, and acute infarctions were excluded. The patient medical records were reviewed to evaluate neurologic status. RESULTS Restriction of diffusion was observed in the striatum and/or thalamus ipsilateral to the surgical site in 17 patients (13.6%). The distribution of signal abnormality correlated with the location of the operation, in concordance with the architecture of the striatocortical and thalamocortical connections. Reduced diffusion was observed from days 7 to 46 after the operation, especially during days 8-21. The signal abnormalities completely resolved on follow-up examinations. The median follow-up period was 202 days (interquartile range, 76-487 days). CONCLUSIONS Postoperative transient reduced diffusion in the ipsilateral striatum and/or thalamus likely represents an early phase of secondary neuronal degeneration based on its characteristic distribution and time course. Clinically, this reduced diffusion should not be mistaken for postoperative ischemic injury.
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Affiliation(s)
- K Kamiya
- Department of Radiology, National Center Hospital of Neurology and Psychiatry, Kodaira, Tokyo, Japan
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24
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Ota M, Ishikawa M, Sato N, Hori H, Sasayama D, Hattori K, Teraishi T, Nakata Y, Kunugi H. Glutamatergic changes in the cerebral white matter associated with schizophrenic exacerbation. Acta Psychiatr Scand 2012; 126:72-8. [PMID: 22432602 DOI: 10.1111/j.1600-0447.2012.01853.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Glutamatergic dysfunction in the brain has been implicated in the pathophysiology of schizophrenia. This study was aimed to examine several brain chemical mediators, including Glx (glutamate + glutamine), using (1)H magnetic resonance spectroscopy (MRS) in medicated patients with schizophrenia, with and without psychotic exacerbation. METHOD (1)H MRS was acquired in 24 patients with schizophrenia, with psychotic exacerbation; 22 patients without exacerbation; and 27 age- and sex-matched healthy volunteers. The levels of metabolites were measured in the left frontal and inferior parietal white matter and compared across the three groups. RESULTS The Glx level was significantly elevated in the left inferior parietal white matter in the patients with psychotic exacerbation in comparison with that in the healthy volunteers and the patients without exacerbation (P < 0.05). We also detected that there was a significant correlation between Positive and Negative Syndrome Scale-positive scale and Glx level in the left parietal white matter (r = 0.51, P < 0.001). CONCLUSION Higher than normal Glx levels indicate glutamatergic overactivity in the left inferior parietal white matter with schizophrenic exacerbation, a finding that is in accordance with the glutamatergic hypothesis in schizophrenia. The Glx level measured by (1)H MRS could be a biomarker for exacerbation in schizophrenia.
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Affiliation(s)
- M Ota
- Department of Mental Disorder Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
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Narimatsu H, Kakinuma A, Sawa T, Komatsu T, Matsumura T, Kami M, Nakata Y. Usefulness of a bidirectional e-learning material for explaining surgical anesthesia to cancer patients. Ann Oncol 2011; 22:2121-2128. [DOI: 10.1093/annonc/mdq718] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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26
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Sugimoto T, Morioka N, Sato K, Hisaoka K, Nakata Y. Noradrenergic regulation of period1 expression in spinal astrocytes is involved in protein kinase A, c-Jun N-terminal kinase and extracellular signal-regulated kinase activation mediated by α1- and β2-adrenoceptors. Neuroscience 2011; 185:1-13. [DOI: 10.1016/j.neuroscience.2011.04.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 04/08/2011] [Accepted: 04/08/2011] [Indexed: 10/18/2022]
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Nakata Y, Sannomiya H, Moriuchi S, Yokota A, Inoue Y, Itoh M, Itoh H. Study of Bandgap Profiling Control on Photovoltaic Performance in the Three Stacked Amorphous Solar Cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-192-15] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTA series of systematic experiments has been made on a bandgap profiling control using a-SiGe and a-SiC cells to clarify the cause for the improvement of the photovoltaic performance by the bandgap profiling in the photovoltaic active layer. It has been shown from the analysis that the most important contribution to the cell performance is an optimization of the ambipolar carrier collection by the bandgap profiling. On the basis of the results, an efficiency of 10.1% was obtained at the promising a-SiC/a-Si/ a-SiGe multi-bandgap stacked cell by the bandgap profiling.
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Hori Y, Tada H, Nakamura K, Naito S, Nakata Y, Goto K, Imamoto J, Yokokawa M, Tanaka Y, Funabashi N, Aonuma K, Komuro I, Taniguchi K, Oshima S. Presence of structural heart disease and left ventricular dysfunction predict hospitalizations for new-onset heart failure after right ventricular apical pacing. Europace 2010; 13:230-6. [DOI: 10.1093/europace/euq443] [Citation(s) in RCA: 7] [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: 11/14/2022] Open
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29
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Nakata Y, Sato N, Masumoto T, Mori H, Akai H, Nobusawa H, Adachi Y, Oba H, Ohtomo K. Parasellar T2 dark sign on MR imaging in patients with lymphocytic hypophysitis. AJNR Am J Neuroradiol 2010; 31:1944-50. [PMID: 20651017 DOI: 10.3174/ajnr.a2201] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE MR imaging findings of LYH and pituitary adenomas are similar, but the therapeutic strategies are completely different. The purpose of this study was to evaluate sellar and parasellar MR imaging findings in patients with both diseases, as well as characteristic clinical findings. MATERIALS AND METHODS Clinical findings, including endocrinologic study and MR images of 20 patients with LYH and 22 patients with pituitary adenoma, were retrospectively reviewed. We evaluated the MR images in relation to the following: 1) the PPHI on T1-weighted images, 2) thickened stalk (>3.5 mm), 3) pituitary symmetry, 4) pituitary enhancement pattern, 5) a dural tail, and 6) parasellar signal intensity on T2- and T1-weighted images. RESULTS Between patients with LYH and those with pituitary adenoma, a significant difference was identified for the number of patients with loss of PPHI, thickened stalk, pituitary symmetry, homogeneous enhancement, and parasellar dark signal intensity on T2-weighted images by statistical analysis (Fisher exact probability test, P < .05). Among them, only parasellar dark signal intensity on T2-weighted images had no false-positive cases. CONCLUSIONS The parasellar T2 dark sign can be a specific finding used to distinguish pituitary adenoma from LYH.
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Affiliation(s)
- Y Nakata
- Department of Radiology, National Center Hospital of Neurology and Psychiatry, Tokyo, Japan
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Yamada H, Nakata Y, Ninomiya S, Seki T, Aoki T, Tamura J, Matsuo J. MeV-energy probe SIMS imaging of major components in washed and fractured animal cells. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3408] [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: 11/09/2022]
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Ichiki K, Ninomiya S, Nakata Y, Yamada H, Seki T, Aoki T, Matsuo J. Surface morphology of PMMA surfaces bombarded with size-selected gas cluster ion beams. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3444] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Nakata Y, Barkovich AJ, Wahl M, Strominger Z, Jeremy RJ, Wakahiro M, Mukherjee P, Sherr EH. Diffusion abnormalities and reduced volume of the ventral cingulum bundle in agenesis of the corpus callosum: a 3T imaging study. AJNR Am J Neuroradiol 2009; 30:1142-8. [PMID: 19246528 DOI: 10.3174/ajnr.a1527] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND PURPOSE Patients with agenesis of the corpus callosum (AgCC) exhibit cognitive and behavioral impairments that are not replicated by surgical transection of the callosum, suggesting that other anatomic changes may contribute to the observed clinical findings. The purpose of this study was to determine whether the ventral cingulum bundle (VCB) is affected in patients with AgCC by using diffusion tensor imaging (DTI) and volumetry. MATERIALS AND METHODS Twelve participants with AgCC (8 males and 4 females; mean age, 30 +/- 20) and 12 control subjects matched for age and sex (mean age, 37 +/- 19) underwent MR imaging and DTI at 3T. 3D fiber tracking of the VCB was generated from DTI and the average fractional anisotropy (FA) was computed for the tracked fibers. Additionally, the volume, cross-sectional area, and length of the VCB were measured by manually drawn regions of interest on thin-section coronal T1-weighted images. The Student t test was used to compare these results. RESULTS Compared with controls, subjects with AgCC demonstrated significantly reduced FA in the right VCB (P = .0098) and reduced volume and cross-sectional areas of both the left and right VCB (P < .001 for all metrics). The length of the VCB was also significantly reduced in the complete AgCC subgroup compared with controls (P = .030 in the right and P = .046 in the left, respectively). CONCLUSIONS Patients with AgCC have abnormal microstructure and reduced volume of the VCB, suggesting that abnormalities in intrahemispheric white matter tracts may be an important contributor to the clinical syndrome in patients with AgCC.
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Affiliation(s)
- Y Nakata
- Department of Radiology, University of California, San Francisco, San Francisco, CA 94143-0628, USA.
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Kokawa K, Mikami Y, Sakata H, Oki N, Tanakas T, Yamazaki M, Nakata Y, Umesaki N. Clinical outcome and prognostic factors in borderline tumors of the ovary. Results from 17 years' experience in the Kinki District of Japan (1990-2006). EUR J GYNAECOL ONCOL 2009; 30:155-161. [PMID: 19480244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
PURPOSE OF INVESTIGATION The clinical characteristics and long-term prognostic factors of borderline ovarian tumors (BOTs) were evaluated. METHODS Data from patients who were treated for BOTs in the Kinki District of Japan from 1990 to 2006 were revieved. Two hundred and twenty-two cases were retrospectively investigated for stage, surgical procedure, histopathological features, adjuvant chemotherapy and prognosis. RESULTS FIGO stages included 212 patients with Stage I disease, three with Stage II and seven with Stage III. One hundred and sixty-nine cases were diagnosed as mucinous tumor, 47 were serous, and six were others. Radical surgery was performed in 136 patients and conservative surgery in 86 patients. Only two patients showed invasive peritoneal implants. Forty patients received adjuvant chemotherapy. The survival rate was 95% at ten-years. Statistical analysis showed that earlier stage, absence of residual tumors, peritoneal implants, ovarian stromal involvement, and negative peritoneal cytology were associated with significantly better overall survival. CONCLUSION The prognosis of patients with BOT is excellent. There are insufficient data to support a role for aggressive surgery and adjuvant chemotherapy for the possibility of prolonged survival.
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Affiliation(s)
- K Kokawa
- Department of Obstetrics and Gynecology, Wakayama Medical University, Wakayama, Japan
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Ichikawa H, Kataoka M, Hiramatsu J, Ohmori M, Tanimoto Y, Kanehiro A, Nakata Y, Tanimoto M. Quantitative analysis of propionibacterial DNA in bronchoalveolar lavage cells from patients with sarcoidosis. Sarcoidosis Vasc Diffuse Lung Dis 2008; 25:15-20. [PMID: 19070256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND AND AIM OF THE WORK The causes of sarcoidosis are still unknown. Propionibacterial subspieces are thought to be one of the most likely sources of antigens. Here we attempted to measure the amount of propionibacterial DNA in bronchoalveolar lavage (BAL) cell samples from patients with sarcoidosis and other pulmonary diseases. METHODS We examined BAL cells from 42 patients with sarcoidosis and 30 controls. Using quantitative polymerase chain reaction (PCR) for 16S rRNA of Propionibacterium acnes (P. acnes) and Propionibacterium granulosum (P. granulosum), we measured the amount of propionibacterial DNA in 500 ng of total DNA extracted from BAL cells from patients with sarcoidosis or other lung diseases. The correlation between clinical findings and the results of quantitative PCR were analyzed. RESULTS The mean level of P. acnes DNA from patients with sarcoidosis was 59.9 genomes per 500 ng of total DNA, which was significantly higher than that in controls (20.7 genomes, p<0.000l). The mean level of P. granulosum DNA from patients with sarcoidosis was 1.2 genomes, which was similar to that in controls (1.0 +/-1.6 genomes, p=0.52). The number of genomes of P. acnes in BAL cells was correlated with the serum angiotensin-converting enzyme (ACE) level and the percentage of macrophages in BAL fluid from patients with sarcoidosis. CONCLUSIONS The amount of P. acnes DNA in BAL cells from patients with sarcoidosis was significantly higher than that in BAL cells from patients with other pulmonary diseases. P. acnes may be involved in the pathogenesis of sarcoidosis.
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Affiliation(s)
- H Ichikawa
- Department of Hematology, Oncology and Respiratory Medicine, Okayama University Medical School, Okayama city, Okayama, Japan.
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Kondoh K, Nakata Y, Yamaoka T, Itakura M, Hayashi M, Yamada K, Hata JI, Yamada T. Altered cellular immunity in transgenic mice with T cell-specific expression of human D4-guanine diphosphate-dissociation inhibitor (D4-GDI). Int Immunol 2008; 20:1299-311. [DOI: 10.1093/intimm/dxn084] [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: 01/25/2023] Open
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Sato N, Ota M, Yagishita A, Miki Y, Takahashi T, Adachi Y, Nakata Y, Sugai K, Sasaki M. Aberrant midsagittal fiber tracts in patients with hemimegalencephaly. AJNR Am J Neuroradiol 2008; 29:823-7. [PMID: 18238845 DOI: 10.3174/ajnr.a0919] [Citation(s) in RCA: 27] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In hemimegalencephaly, MR imaging often reveals midsagittal bandlike structures between the 2 lateral ventricles. To determine whether these structures are aberrant midsagittal fibers, we retrospectively reviewed them on conventional MR imaging and prospectively examined them by diffusion tensor MR and fiber tract (FT) reconstruction imaging. MATERIALS AND METHODS We retrospectively reviewed conventional MR images of 26 consecutive patients with hemimegalencephaly by 2 neuroradiologists, focusing on abnormal midsagittal structures. The distance between the 2 anterior horns and widths of midsagittal bandlike structures were measured. Prospective analysis was performed in 7 consecutive patients with hemimegalencephaly examined for midsagittal aberrant fibers by diffusion tensor imaging, and cortical distribution areas of the fibers were observed. RESULTS The distance between the 2 anterior horns was wide (>4 mm) due to white matter-intensity structures in 20 of 26 patients (76.9%). Mid-sagittal bandlike structures were observed in 15 patients (57.7%). Asymmetry of the fornices was detected in 7 patients (26.9%), and both fornices were thickened in 7 (26.9%) patients. On FT reconstruction, images showed that 4 of 7 patients with hemimegalencephaly had aberrant midsagittal fibers connecting frontal, occipital, or parietal lobes, bilaterally (n = 3) or ipsilaterally (n = 1). All 4 patients had increased width between the 2 anterior horns, and 3 of them exhibited midsagittal bandlike structures on conventional MR imaging. On the other hand, these MR imaging findings were not noted in 3 patients who did not have aberrant midsagittal fibers on diffusion tensor imaging. CONCLUSIONS Aberrant midsagittal FTs running intra- or interhemispherically do not infrequently exist in patients with hemimegalencephaly.
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Affiliation(s)
- N Sato
- Department of Radiology, Musashi Hospital, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
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Masunari N, Fujiwara S, Nakata Y, Nakashima E, Nakamura T. Historical height loss, vertebral deformity, and health-related quality of life in Hiroshima cohort study. Osteoporos Int 2007; 18:1493-9. [PMID: 17541811 DOI: 10.1007/s00198-007-0392-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2007] [Accepted: 04/23/2007] [Indexed: 11/26/2022]
Abstract
UNLABELLED Height loss and vertebral deformity had independent effects on health-related quality of life evaluated by the European quality-of-life five-domain questionnaire (EQ-5D) in a cohort of 2,021 elderly Japanese men and women. Height loss aggravated EQ-5D more strongly than vertebral deformity in all domains, with different patterns. INTRODUCTION Vertebral deformity reduces the activities of daily living and quality of life, and elevates mortality. Height loss is taken to be a sign of vertebral deformity, although other factors could also cause height loss. In this study, we examined the difference in EQ-5D between elderly with height loss and with vertebral deformity. METHODS The subjects were 2,021 men and women aged 57-101 years from the Hiroshima Cohort who underwent health examinations in 2002-03 and responded to the EQ-5D. Vertebral deformity was assessed semi-quantitative methods using lateral chest and spine radiographs. Height was measured during the routine biennial examinations, which have been conducted since 1958. We used linear regression analyses, ordered polytomous logistic regression analyses, and Bonferroni tests. RESULTS Eighty three men and 314 women had prevalent vertebral deformity. The mean height loss was 2.2 cm for men and 3.9 cm for women. Height loss > or =4 cm (P < 0.01) and vertebral deformity (P = 0.04) were independent risk factors for low EQ-5D scores, after adjustment for sex and age. CONCLUSIONS The present study showed that height loss and vertebral deformity affected EQ-5D significantly and independently in the elderly.
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Affiliation(s)
- N Masunari
- Department of Clinical Studies, Radiation Effects Research Foundation, 5-2 Hijiyama Park, Minami-ku, Hiroshima 732-0815, Japan.
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Honda Y, Nakata Y, Ono M. Climate and Relations Between Cause-Specific Mortality Rates and Daily Temperature in Japan. Epidemiology 2007. [DOI: 10.1097/01.ede.0000276522.65098.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sato N, Yagishita A, Oba H, Miki Y, Nakata Y, Yamashita F, Nemoto K, Sugai K, Sasaki M. Hemimegalencephaly: a study of abnormalities occurring outside the involved hemisphere. AJNR Am J Neuroradiol 2007; 28:678-82. [PMID: 17416820 PMCID: PMC7977333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
BACKGROUND AND PURPOSE Hemimegalencephaly is a rare but well-known congenital malformation with ipsilateral enlargement of the hemicerebrum. However, very little is known about changes in structures outside the involved hemisphere in patients with this condition. We investigated morphologic abnormalities occurring outside the affected hemisphere by MR imaging in a large series of patients with hemimegalencephaly. MATERIALS AND METHODS MR imaging findings for 30 patients with hemimegalencephaly were retrospectively reviewed and evaluated for structures outside the involved hemisphere on routine MR images, such as cranial nerves (I, II, V), brain vessels, subdural and subarachnoid spaces, brain stem, and cerebellum, on both the ipsilateral and contralateral sides. RESULTS The ipsilateral olfactory and optic nerves were enlarged in 8 (26.7%) and 1 (3.3%) of the 30 patients, respectively, without enlargement on the contralateral side. No asymmetry was noted in the trigeminal nerves. Asymmetric vascular dilations in the ipsilateral cerebral hemisphere were observed in 12 of the 30 patients (40%), in deep cerebral vessels in 11 patients (36.7%), and in superficial cerebral vessels in 8 patients (26.7%). Ipsilateral brain stem and hemicerebellar asymmetric enlargement was detected in 2 patients (6.7%) and 14 patients (46.7%), respectively. Abnormal cerebellar folia were observed on the ipsilateral side in 6 patients (20%) and on the contralateral side in 3 patients (10%). CONCLUSION Ipsilateral olfactory nerve enlargement, cerebral vascular dilations, cerebellar enlargement, and bilateral or ipsilateral abnormal architecture of the cerebellar folia are often associated with hemimegalencephaly.
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Affiliation(s)
- N Sato
- Department of Radiology, National Center Hospital for Mental, Nervous, and Muscular Disorders, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
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Matsumoto E, Tanaka E, Tabe H, Wakisaka N, Nakata Y, Ueda H, Hori T, Abe T, Tanne K. Sleep architecture and the apnoea?hypopnoea index in children with obstructive-sleep apnoea syndrome. J Oral Rehabil 2007; 34:112-20. [PMID: 17244233 DOI: 10.1111/j.1365-2842.2006.01676.x] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study aimed to examine the sleep architecture and craniofacial morphology in a group of children divided by different levels of apnoea-hypopnoea index (AHI), 5, 4.5, 4, 3.5, 3 and 2.5, and to determine an AHI threshold value at which sleep architecture is most affected. 23 children, who were selected from a preliminary questionnaire survey about sleep-related breathing disorders, were evaluated with cephalometric radiographs and overnight polysomnography. The findings indicated that the children with AH1 > or = 2.5 and > or = 3 showed significantly larger numbers of waking (p < 0.005) and desaturation index (p < 0.01) than those with AHI <2.3 and <3, respectively. Significantly (p < 0.05) higher amounts of waking and lower amounts of REM as a percentage of total sleep time (TST) were also found in the children with AH1 > or = 3. In the subgroups with AHI > or = 3.5 and > or = 4, only the percentage of REM was found to be significantly (p < 0.05) lower. No significant differences were found at the AHI threshold of 4.5 and 4. AHI correlated significantly (p < 0.05) with the number of awakenings, amount of waking as a percentage of TST, desaturation index and oxygen saturation nadir. Higher incidence of skeletal Class II pattern was found in children with AHI > or = 2.5 and > or = 3, and Class III in those with AHI <2.3 and <3, respectively. The effects on polysomnographic characteristics demonstrated to be the greatest on children at the AHI threshold of 3. In addition, the evaluation of oxygen saturation can be used to provide some information concerning the severity of sleep-related breathing disorders.
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Affiliation(s)
- E Matsumoto
- Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, Minami-ku, Hiroshima, Japan
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Song HZ, Usuki T, Ohshima T, Sakuma Y, Kawabe M, Okada Y, Takemoto K, Miyazawa T, Hirose S, Nakata Y, Takatsu M, Yokoyama N. Site-controlled quantum dots fabricated using an atomic-force microscope assisted technique. Nanoscale Res Lett 2006; 1:160. [PMCID: PMC3246671 DOI: 10.1007/s11671-006-9012-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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An atomic-force microscope assisted technique is developed to control the position and size of self-assembled semiconductor quantum dots (QDs). Presently, the site precision is as good as ± 1.5 nm and the size fluctuation is within ± 5% with the minimum controllable lateral diameter of 20 nm. With the ability of producing tightly packed and differently sized QDs, sophisticated QD arrays can be controllably fabricated for the application in quantum computing. The optical quality of such site-controlled QDs is found comparable to some conventionally self-assembled semiconductor QDs. The single dot photoluminescence of site-controlled InAs/InP QDs is studied in detail, presenting the prospect to utilize them in quantum communication as precisely controlled single photon emitters working at telecommunication bands.
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Affiliation(s)
- HZ Song
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - T Usuki
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - T Ohshima
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - Y Sakuma
- Nanomaterials Laboratory, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan
| | - M Kawabe
- Nanomaterials Laboratory, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan
| | - Y Okada
- Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki, 305-8773, Japan
| | - K Takemoto
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - T Miyazawa
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - S Hirose
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - Y Nakata
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - M Takatsu
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
| | - N Yokoyama
- Nanotechnology Research center, Fujitsu Lab. Ltd., Morinosato-Wakamiya 10-1, Atsugi, Kanagawa, 243-0197, Japan
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Hashimoto T, Fujita H, Sakaue H, Nakata Y, Nomura S. Comparison of accumulated doses in quartz and feldspar extracts from atomic bomb-exposed roof tiles using several luminescence methods. RADIAT MEAS 2006. [DOI: 10.1016/j.radmeas.2006.06.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nakata Y, Yagishita A, Arai N. Two patients with intraspinal germinoma associated with Klinefelter syndrome: case report and review of the literature. AJNR Am J Neuroradiol 2006; 27:1204-10. [PMID: 16775265 PMCID: PMC8133920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
We report 2 cases of intraspinal germinoma associated with Klinefelter syndrome. In one patient, spinal cord atrophy was observed at the upper and lower ends of the intraspinal tumor. Brain atrophy was observed in both cases. Germinoma should be included in the differential diagnosis if an intraspinal tumor is observed in a patient with Klinefelter syndrome.
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Affiliation(s)
- Y Nakata
- Department of Neuroradiology, Tokyo Metropolitan Neurological Hospital, 2-6-1 Musashi-dai, Fuchu, Tokyo 183-0042, Japan
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Numao S, Hayashi Y, Katayama Y, Matsuo T, Tomita T, Ohkawara K, Nakata Y, Tanaka K. Effects of obesity phenotype on fat metabolism in obese men during endurance exercise. Int J Obes (Lond) 2006; 30:1189-96. [PMID: 16520811 DOI: 10.1038/sj.ijo.0803282] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE The effects of obesity phenotype on fat metabolism during endurance exercise are unclear. This study aimed to investigate in obese men whether body fat distribution would influence plasma fat availability and oxidation during endurance exercise. DESIGN Fourteen sedentary men (body mass index (BMI) > 25 kg/m2) were divided into two groups by visceral fat (VF) area: VF obese (VF-Ob) (n = 7, age; 52.0 +/- 2.5 (s.e.) years) and abdominal subcutaneous fat obese (SF-Ob) (n = 7, age; 57.3 +/- 2.8 (s.e.) years). All participants performed stationary cycling exercise for 60 min at 50% of peak oxygen uptake. MEASUREMENTS Blood and respiratory gas samples were taken for analysis of hormone, metabolite and substrate oxidation in each participant at rest and during exercise. RESULTS There is a significant group x time interaction in the plasma concentration of free fatty acid (FFA) (P < 0.05) and glycerol (P < 0.05) during the exercise bout. In addition, total plasma concentration of FFA (area under the curve) was 59.2% higher in VF-Ob compared with SF-Ob men during endurance exercise (1.99 +/- 0.24 and 1.25 +/- 0.13 mEq/l/min, respectively; P < 0.05). Total plasma concentration of glycerol (area under the curve) was 102.3% higher in VF-Ob than SF-Ob men during the exercise (69.6 +/- 12.5 and 34.4 +/- 5.1 mg/dl/min, respectively; P < 0.05). However, fat oxidation was not different throughout the exercise between VF-Ob and SF-Ob men (176.5 +/- 25.7 and 183.0 +/- 12.8 kcal/60 min, respectively). CONCLUSION During moderate endurance exercise, plasma fat availability may be higher in men with VF obesity compared to men with SF obesity. However, total fat oxidation is similar between obesity phenotype.
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Affiliation(s)
- S Numao
- Graduate school of Comprehensive Human Science, University of Tsukuba, Ibaraki, Japan
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Ota T, Rontani M, Tarucha S, Nakata Y, Song HZ, Miyazawa T, Usuki T, Takatsu M, Yokoyama N. Few-electron molecular states and their transitions in a single InAs quantum dot molecule. Phys Rev Lett 2005; 95:236801. [PMID: 16384326 DOI: 10.1103/physrevlett.95.236801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2005] [Indexed: 05/05/2023]
Abstract
We study electronic configurations in a single pair of vertically coupled self-assembled InAs quantum dots, holding just a few electrons. By comparing the experimental data of nonlinear single-electron transport spectra in a magnetic field with many-body calculations, we identify the spin and orbital configurations to confirm the formation of molecular states by filling both the quantum mechanically coupled symmetric and antisymmetric states. Filling of the antisymmetric states is less favored with increasing magnetic field, and this leads to various magnetic field induced transitions in the molecular states.
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Affiliation(s)
- T Ota
- ERATO/SORST/ICORP, JST, Atsugi-shi, Kanagawa 243-0198, Japan.
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Abstract
OBJECTIVE To test the effects on abdominal fat reduction of adding aerobic exercise training to a diet program and obesity phenotype in response to weight loss. DESIGN A prospective clinical trial with a 14-week weight-loss intervention design. SETTING AND PARTICIPANTS In total, 209 overweight and obese women were assigned to four subgroups depending on type of treatment and the subject's obesity phenotype: diet alone (DA) with intra-abdominal fat (IF) obesity (> or =mean IF area), diet plus exercise (DE) with IF obesity, DA with abdominal subcutaneous fat (ASF) obesity (<mean IF area) and DE with ASF obesity. Abdominal fat areas were evaluated by CT scans, with values adjusted for selected variables. RESULTS Values were adjusted for age, menopausal status and change in body weight and total fat mass. The IF reductions were significantly (P<0.0001) greater in subjects with IF obesity phenotype (-45.1 cm2) compared to the ASF obesity phenotype (-22.2 cm2). The ASF reductions were significantly (P<0.001) greater for subjects with ASF obesity (-74.5 cm2) compared to IF obesity (-55.5 cm2). For IF obesity, the IF reduction was significantly (P<0.01) greater in the DE group (-49.3 cm2) than in the DA group (-37.8 cm2). CONCLUSION These results suggest that for individuals with IF obesity, the efficacy on reducing IF of adding aerobic exercise training to a diet-alone weight-reduction program is more prominent (-49.3 cm2/-37.8 cm2=1.3 times) compared with DA. Moreover, abdominal fat reduction was found to be modified by obesity phenotype in response to weight loss.
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Affiliation(s)
- T Okura
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.
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Ikeda T, Kimura F, Nakata Y, Sato K, Ogura K, Motoyoshi K, Sporn M, Kufe D. Triterpenoid CDDO-Im downregulates PML/RARα expression in acute promyelocytic leukemia cells. Cell Death Differ 2005; 12:523-31. [PMID: 15746941 DOI: 10.1038/sj.cdd.4401574] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The triterpenoid 2-cyano-3,12-dioxooleana-1,9-dien-28-oic acid (CDDO) induces differentiation and apoptosis of diverse human tumor cells. In the present study, we examined the effects of the CDDO imidazolide imide (CDDO-Im) on the NB4 acute promyelocytic leukemia (APL) cell line and primary APL cells. The results show that CDDO-Im selectively downregulates expression of the PML/retinoic receptor alpha fusion protein by a caspase-dependent mechanism and sensitizes APL cells to the differentiating effects of all-trans retinoic acid (ATRA). CDDO-Im treatment of APL cells was also associated with disruption of redox balance and activation of the extrinsic apoptotic pathway. In concert with these results, CDDO-Im sensitizes APL cells to arsenic trioxide (ATO)-induced apoptosis. Our findings indicate that CDDO-Im may be effective in the treatment of APL by: (i) downregulation of PML/RARalpha; (ii) enhancement of ATRA-induced differentiation; and (iii) sensitization of ATO-induced APL cell death.
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Affiliation(s)
- T Ikeda
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
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Ota T, Ono K, Stopa M, Hatano T, Tarucha S, Song HZ, Nakata Y, Miyazawa T, Ohshima T, Yokoyama N. Single-dot spectroscopy via elastic single-electron tunneling through a pair of coupled quantum dots. Phys Rev Lett 2004; 93:066801. [PMID: 15323648 DOI: 10.1103/physrevlett.93.066801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2004] [Indexed: 05/24/2023]
Abstract
We study the electronic structure of a single self-assembled InAs quantum dot by probing elastic single-electron tunneling through a single pair of weakly coupled dots. In the region below pinch-off voltage, the nonlinear threshold voltage behavior provides electronic addition energies exactly as the linear, Coulomb blockade oscillation does. By analyzing it, we identify the s and the p shell addition spectrum for up to six electrons in the single InAs dot, i.e., one of the coupled dots. The evolution of the shell addition spectrum with magnetic field provides Fock-Darwin spectra of the s and p shells.
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Affiliation(s)
- T Ota
- Mesoscopic Correlation Project, ERATO, JST, Atsugi-shi, Kanagawa 243-0198, Japan.
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Ito K, Adachi S, Itani Y, Nobunaga T, Shintani M, Tsubamoto H, Hosokawa K, Fujita H, Nakata Y, Yamazaki N. Phase II trial of weekly paclitaxel and carboplatin (wTJ) for endometrial cancer (EC): Results of a Kansai Clinical Oncology Group trial (KCOG0015) in Japan. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.5085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- K. Ito
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - S. Adachi
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - Y. Itani
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - T. Nobunaga
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - M. Shintani
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - H. Tsubamoto
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - K. Hosokawa
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - H. Fujita
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - Y. Nakata
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
| | - N. Yamazaki
- Kansai Rosai Hospital, Amagasaki, Japan; Hyogo madical college, Nishinomiya, Japan; Nara Prefectural Nara Hospital, Nara, Japan; Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan; Nara Prefectural Mimuro Hospital, Ikoma-gun, Japan; Hyogo Medical College, Nishinomiya, Japan; Kyoto Prefectural University of Medicine, Kyoto, Japan; Kyoto Second Red Cross Hospital, Kyoto, Japan; Kyoto First Red Cross Hospital, Kyoto, Japan; Minamiosaka Hospital, Osaka, Japan
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Takano T, Miyauchi A, Matsuzuka F, Yoshida H, Nakata Y, Kuma K, Amino N. PGP9.5 mRNA could contribute to the molecular-based diagnosis of medullary thyroid carcinoma. Eur J Cancer 2004; 40:614-8. [PMID: 14962731 DOI: 10.1016/j.ejca.2003.11.016] [Citation(s) in RCA: 23] [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: 07/22/2003] [Revised: 11/03/2003] [Accepted: 11/21/2003] [Indexed: 10/26/2022]
Abstract
The protein gene product 9.5 (PGP9.5) is a ubiquitin hydrolase that is widely expressed in neuronal tissues at all stages of neuronal differentiation and is a known neuroendocrine marker. Medullary thyroid carcinoma (MTC) arises from parafollicular cells and is reported to overexpress several mRNAs such as RET, calcitonin, and CEA. These markers are thought to be useful in determining a molecular-based diagnosis of MTC. We examined the expression levels of PGP9.5 mRNA in 80 thyroid tissues using real-time quantitative reverse transcription (RT-PCR) and found that PGP9.5 mRNA was overexpressed in all 11 MTCs examined, both hereditary and sporadic, but not in other histological tumour types. Furthermore, by RT-PCR, PGP9.5 mRNA was detected only in aspirates from three medullary carcinomas, and not in aspirates from other tumour types. These results demonstrate that, in addition to the expression of RET, calcitonin and CEA, PGP9.5 mRNA expression may contribute to the molecular-based diagnosis of MTCs.
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Affiliation(s)
- T Takano
- Department of Laboratory Medicine, Osaka University Graduate School of Medicine, D2, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
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