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Kurita Y, Shirai K, Kubota K, Togashi H, Morita T. Relationship between stable cesium concentration and body size of Japanese flounder Paralichthys olivaceus and the effect of a size-dependent shift in diet. J Fish Biol 2024; 104:866-877. [PMID: 38009686 DOI: 10.1111/jfb.15629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 11/05/2023] [Accepted: 11/23/2023] [Indexed: 11/29/2023]
Abstract
To understand the relationship between the radioactive cesium (Cs) concentration in muscle of Japanese flounder Paralichthys olivaceus and the species' biological characteristics (size, sex, and age) under conditions of ecological equilibrium (i.e., distributed among ecosystem components over sufficient time, and with nearly constant ratios of Cs concentration in organisms to the concentration in water) as existed before the accident at the Fukushima Dai-ichi Nuclear Power Station (FDNPS), Japan, in 2011, we examined stable Cs, as it is thought to exist in equilibrium in the environment and behave similarly to radioactive Cs in aquatic animals. The concentration of stable Cs in 241 P. olivaceus (range 216-782 mm total length [TL]) collected in Sendai Bay, approximately 90 km north of the FDNPS, in June-July 2015 was expressed as an exponential function with size as an independent variable; the results show the concentration of stable Cs doubled with an increase in TL of 442 mm. Next, to evaluate the cause of the size-dependent change in stable Cs concentration, we examined 909 individuals (200-770 mm TL) collected in September 2013-July 2015 to determine their feeding habit based on size. Analysis of the frequency of occurrence of prey organisms in stomach contents showed that sand lance Ammodytes japonicus (55-180 mm standard length [SL]) was the most consistently consumed across size classes. Analysis on a wet-mass basis showed that A. japonicus and anchovy Engraulis japonicus (65-130 mm SL) were the main food of P. olivaceus sized 200-599 mm TL, whereas chub mackerel Scomber japonicus (120-230 mm SL) and two species of flatfishes (180-205 mm SL) were abundant in the diet of P. olivaceus sized ≥600 mm TL. All these prey items were presumed to have similar concentrations of stable Cs. Based on the above, the effect of diet on the relationship between stable Cs in muscle and fish size was considered negligible. That the diet of P. olivaceus largely did not change with size was also confirmed by C and N stable isotope ratios in P. olivaceus and their prey species. Therefore, the Cs-size relationship is probably determined by changes in the balance between the rate of Cs intake from food and seawater and the excretion rate during growth, both of which change as functions of body mass. Values of stable Cs concentrations among environmental components and animals appear to be a valid indicator for understanding the radioactive Cs distribution in the marine environment and aquatic animals under the equilibrium state, as existed before the 2011 nuclear accident.
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Affiliation(s)
- Yutaka Kurita
- Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Yokohama, Japan
| | - Kotaro Shirai
- Atmospheric and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
| | - Kaoru Kubota
- Atmospheric and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
- Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
| | - Hiroyuki Togashi
- Shiogama Field Station, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan
| | - Takami Morita
- Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Yokohama, Japan
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Saitoh Y, Nakano T, Shin K, Matsubayashi J, Kato Y, Amakawa H, Osada Y, Yoshimizu C, Okuda N, Amano Y, Togashi H, Kurita Y, Tayasu I. Utility of Nd isotope ratio as a tracer of marine animals: regional variation in coastal seas and causal factors. Ecosphere 2018. [DOI: 10.1002/ecs2.2365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Yu Saitoh
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Takanori Nakano
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Ki‐Cheol Shin
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Jun Matsubayashi
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Yoshikazu Kato
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Hiroshi Amakawa
- Japan Agency for Marine‐Earth Science and Technology 2‐15, Natsushima‐cho Yokosuka Kanagawa 237‐0061 Japan
| | - Yutaka Osada
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Chikage Yoshimizu
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Noboru Okuda
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
| | - Yosuke Amano
- Tohoku National Fisheries Research Institute 3‐27‐5, Shinhama‐cho Shiogama Miyagi 985‐0001 Japan
| | - Hiroyuki Togashi
- Tohoku National Fisheries Research Institute 3‐27‐5, Shinhama‐cho Shiogama Miyagi 985‐0001 Japan
| | - Yutaka Kurita
- Tohoku National Fisheries Research Institute 3‐27‐5, Shinhama‐cho Shiogama Miyagi 985‐0001 Japan
| | - Ichiro Tayasu
- Research Institute for Humanity and Nature 457‐4, Motoyama Kamigamo, Kita‐ku Kyoto 603‐8047 Japan
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Affiliation(s)
- Kiyoshi Asai
- Japan Atomic Energy Research Institute, Tokai Research Establishment Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - Kenji Higuchi
- Japan Atomic Energy Research Institute, Tokai Research Establishment Tokai-mura, Naka-gun, Ibaraki-ken, Japan
| | - Jun-ichi Katakura
- Japan Atomic Energy Research Institute, Tokai Research Establishment Tokai-mura, Naka-gun, Ibaraki-ken, Japan
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Takahashi S, Kurita Y, Ikeda T, Miyamoto M, Uemiya S, Oumi Y. Synthesis and crystal structures of a novel layered silicate SSA-1 and its microporous derivatives by topotactic transformation. Dalton Trans 2016; 45:16335-16344. [PMID: 27722727 DOI: 10.1039/c6dt02983c] [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: 11/21/2022]
Abstract
The synthesis of a novel layered silicate SSA-1 (SSA: silicate synthesized with a quaternary amine) was achieved in the SiO2-H2O-TEAOH (TEAOH: tetraethylammonium hydroxide - as an organic structural directing agent) system. The crystal structure of SSA-1 involved two silicate layers composed of bre [10T]-type CBU (Composite Building Unit) and TEAOH in interlayers. The topotactic transformation of SSA-1 by calcination was examined, resulting in a porous material (PML-1: porous material transformed from a layered silicate) with a 108 m2 g-1 BET surface area and 0.035 cm3 g-1 pore volume. PML-1 is a siliceous microporous material with silanols in the framework and possesses unique properties, such as hydrophilicity, in spite of all its silica composition. The most reasonable crystal structure of PML-1 was successfully determined on the basis of the crystal structure of SSA-1 by a combination of manual modelling, PXRD pattern simulation, DFT optimization and Rietveld analysis. Additionally, an interlayer expanded siliceous zeolite SSA-1 (IEZ-SSA-1) was also successfully prepared by silylation using trichloro(methyl)silane under acidic conditions. IEZ-SSA-1 showed hydrophilicity or hydrophobicity properties by changing the functional group of the pillar part in the interlayer. Additionally, IEZ-SSA-1 showed a large gas adsorption property (537 m2 g-1 and 0.21 cm3 g-1).
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Affiliation(s)
- S Takahashi
- Graduate School of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Y Kurita
- Graduate School of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - T Ikeda
- National Institute of Advanced industrial and Technology (AIST) Tohoku, 4-2-1, Nigatake, Miyagino-ku, Sendai, 983-8551, Japan
| | - M Miyamoto
- Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - S Uemiya
- Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Y Oumi
- Life Science Research Center, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
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Tsuru N, Mugiya S, Kurita Y, Sato S, Hirano Y. Laparoscopic Pyeloplasty for Ureteropelvic Junction Obstruction in an Incompletely Duplicated Collecting System in a Patient with a Horseshoe Kidney. Urol Case Rep 2016; 9:55-57. [PMID: 27733990 PMCID: PMC5054261 DOI: 10.1016/j.eucr.2016.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 08/31/2016] [Accepted: 09/07/2016] [Indexed: 01/06/2023] Open
Abstract
We present a case of UPJO associated with an incompletely duplicated collecting system in a horseshoe kidney that was successfully treated by laparoscopic pyeloplasty with concomitant pyelolithotomy. A 53-year-old man had three urological anomalies and urolithiasis. We performed a pyeloplasty and pyelolithotomy using a fully intracorporeal technique. Clinical and radiographic evaluation confirmed complete resolution of the patient’s condition. To our knowledge, there have been no reported cases of UPJO in an incompletely duplicated collecting system with a horseshoe kidney in the same patient. We also provide convincing evidence that laparoscopic pyeloplasty is feasible in complex cases of renal anatomic anomalies.
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Affiliation(s)
- Nobuo Tsuru
- Corresponding author. Department of Urology and Endoscopic Surgery Center, Suzukake Central Hospital, 120-1, Tajiri-cho, Minami-ku, Hamamatsu 432-8054, Japan. Fax: +81 53 443 0112.Department of Urology and Endoscopic Surgery CenterSuzukake Central Hospital120-1Tajiri-choMinami-kuHamamatsu432-8054Japan
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Uematsu A, Kurita Y, Inoue K, Okuno K, Hortobágyi T, Suzuki S. A 200-m All-out Front-crawl Swim Modifies Competitive Swimmers’ Shoulder Joint Position Sense. Int J Sports Med 2015; 36:1081-6. [DOI: 10.1055/s-0035-1554698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Uematsu
- Department of Sport Sciences, Dokkyo Medical University, Shimotsuga-gun, Japan
| | - Y. Kurita
- Graduate School of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - K. Inoue
- Faculty of Engineering, Kagawa University, Takamatsu, Japan
| | - K. Okuno
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - T. Hortobágyi
- University of Groningen, University of Groningen Medical Center, Groningen, Netherlands
| | - S. Suzuki
- Faculty of Human Sciences, Waseda University, Tokorozawa, Japan
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Yamashita YT, Aritaki M, Kurita Y, Tanaka M. Early growth and development of reciprocal hybrids of the starry flounder Platichthys stellatus and stone flounder Kareius bicoloratus. J Fish Biol 2014; 84:1503-1518. [PMID: 24773542 DOI: 10.1111/jfb.12376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 02/05/2014] [Indexed: 06/03/2023]
Abstract
Larval growth and development of hybrid flounder were observed and compared with those of their parent species. The reciprocal hybrids of female starry flounder Platichthys stellatus and male stone flounder Kareius bicoloratus (hybrid Sb) and of female K. bicoloratus and male P. stellatus (hybrid Bs) both survived and grew to juveniles. Development was divided into nine stages (A-I). Many of the hybrids' traits were identical and intermediate to those of their parents. The position of the eye, however, was primarily sinistral in both hybrids (80% in Sb and 76% in Bs), a trait possessed by P. stellatus (80%) in the western Pacific Ocean. The daily growth rates of the larvae were similar. In the parent species, development was more rapid in P. stellatus than in K. bicoloratus whereas rate of development was intermediate in both Sb and Bs hybrids. The size at settlement [standard length (LS ) at stage H (mean ± s.d.)] was 9·82 ± 1·47 mm for the hybrid Sb and 9·99 ± 0·90 mm for the hybrid Bs, while the minimum age at metamorphosis (initial age at stage H) was 29 days after hatching (DAH) in both hybrids. In comparison, LS at settlement in parent species was 6·43 ± 0·25 mm for P. stellatus and 12·87 ± 1·29 mm for K. bicoloratus. Minimum age at metamorphosis for the parents was 23 DAH at stage G in P. stellatus and 34 DAH at stage H in K. bicoloratus. Thus, the timing of settlement of hybrids was different from that of their parent species. These traits may occur with high frequency in a natural habitat.
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Affiliation(s)
- Y T Yamashita
- Hokkaido National Fisheries Research Institute, Fisheries Research Agency, Kushiro, Hokkaido, 085-0802, Japan
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Soh Z, Saito M, Kurita Y, Takiguchi N, Ohtake H, Tsuji T. A Comparison Between the Human Sense of Smell and Neural Activity in the Olfactory Bulb of Rats. Chem Senses 2013; 39:91-105. [DOI: 10.1093/chemse/bjt057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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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Suzuki T, Furuse H, Kurita Y, Imanishi T, Tamura K, Otsuka A, Mugiya S, Ozono S. [Long-term survival of metastatic clear cell adenocarcinoma of the female urethra by multidisciplinary treatment: a case report]. Nihon Hinyokika Gakkai Zasshi 2013; 104:549-553. [PMID: 23819370 DOI: 10.5980/jpnjurol.104.549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report a case of clear cell adenocarcinoma of the female urethra. A 57-year-old woman presented with complaint of gross hematuria. Abdominal ultrasonography, cystourethroscopy, computed tomography (CT) and magnetic resonance imaging (MRI) revealed the urethral tumor was invasive to bladder neck. Clinical stage was determined as cT3N1M0, then anterior pelvic exenteration and ileal conduit formation were performed. The pathological diagnosis was clear cell adenocarcinoma of urethra and the stage was pT3N1. The patient received TS-1 and cisplatin for postoperative recurrence, but she died from multiple lung metastasis 54 months after the operation. Clear cell adenocarcinoma of the female urethra is rare case in the Japanese literatures. Pathogenesis and management of this rare condition are discussed.
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Affiliation(s)
- Takahisa Suzuki
- Department of Urology, Hamamatsu University School of Medicine
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Suzuki T, Furuse H, Kurita Y, Ushiyama T, Mugiya S, Ozono S, Oki Y. Laparoscopic simultaneous bilateral adrenalectomy for testosterone-secreting bilateral adrenal tumors. Int J Urol 2013; 21:117-9. [DOI: 10.1111/iju.12172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 03/18/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Takahisa Suzuki
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu Shizuoka Japan
| | - Hiroshi Furuse
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu Shizuoka Japan
| | - Yutaka Kurita
- Department of Urology; Enshu Hospital; Hamamatsu Shizuoka Japan
| | | | - Soichi Mugiya
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu Shizuoka Japan
| | - Seiichiro Ozono
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu Shizuoka Japan
| | - Yutaka Oki
- Department of Endocrinology and Metabolism; Hamamatsu University School of Medicine; Hamamatsu Shizuoka Japan
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Matsumoto R, Otsuka A, Suzuki T, Shinbo H, Mizuno T, Kurita Y, Mugiya S, Ozono S. Expression and functional role of β3-adrenoceptors in the human ureter. Int J Urol 2013; 20:1007-14. [DOI: 10.1111/iju.12093] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Accepted: 12/26/2012] [Indexed: 12/01/2022]
Affiliation(s)
- Rikiya Matsumoto
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu; Japan
| | - Atsushi Otsuka
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu; Japan
| | - Takahisa Suzuki
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu; Japan
| | | | - Takuji Mizuno
- Department of Urology; Iwata City Hospital; Iwata; Japan
| | - Yutaka Kurita
- Department of Urology; Enshu Hospital; Hamamatsu; Japan
| | - Soichi Mugiya
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu; Japan
| | - Seiichiro Ozono
- Department of Urology; Hamamatsu University School of Medicine; Hamamatsu; Japan
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Otsuka A, Kawasaki H, Matsumoto R, Shinbo H, Kurita Y, Iwashita T, Ozono S. Expression of β-Adrenoceptor Subtypes in Urothelium, Interstitial Cells and Detrusor of the Human Urinary Bladder. Low Urin Tract Symptoms 2013; 5:173-80. [PMID: 26663456 DOI: 10.1111/luts.12007] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE We examined whether interstitial cells (ICs) of the human urinary bladder expressed β-adrenoceptor (AR) subtypes, and semiquantitatively compared the staining intensity among urothelium, ICs and detrusor muscles. METHODS Paraffin sections of the human urinary bladder were obtained from histologically normal areas of formalin-fixed specimens removed for bladder carcinoma. Double-labeling immunohistochemical methods using antibodies against each β-AR subtype and vimentin were performed to identify ICs of the human urinary bladder. The staining intensity of β-ARs was semiquantitatively compared among urothelium, ICs and detrusor muscles. Further, gender-related difference or age-related correlation in the staining intensity of β-ARs was compared in the same cell types. RESULTS The expression of β1 -, β2 -, and β3 -AR was observed in vimentin-positive ICs localized in suburothelium, between detrusor muscle bundles, and within these bundles of the human urinary bladder. The rank order of the staining intensity was urothelium > ICs = detrusor muscles in β1 -AR, urothelium > ICs > detrusor muscles in β2 -AR, whereas its order was ICs = detrusor muscles > urothelium in β3 -AR. Except for urothelial β1 -AR, there was no gender-related difference in the signal intensity of β-ARs in the urothelium, ICs or detrusor muscles. Age negatively correlated with the signal intensity of all β-AR subtypes. CONCLUSION β-ARs were expressed in vimentin-positive ICs of the human urinary bladder. As for β2 - and β3 -AR, there was no gender-related difference or age-related correlation in urothelium, ICs and detrusor muscles. In the human urinary bladder, β-ARs expressed in ICs may play a role in bladder physiology.
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Affiliation(s)
- Atsushi Otsuka
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
| | - Hideya Kawasaki
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
| | - Rikiya Matsumoto
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
| | - Hitoshi Shinbo
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
| | - Yutaka Kurita
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
| | - Toshihide Iwashita
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
| | - Seiichiro Ozono
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Regenerative and Infectious Pathology, Hamamatsu University School of Medicine, Hamamatsu, JapanDepartment of Urology, Enshu Hospital, Hamamatsu, Japan
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Arihiro K, Oda M, Ogawa K, Tominaga K, Kaneko Y, Shimizu T, Matsumoto S, Oda M, Kurita Y, Taira Y. Discordant HER2 Status Between Primary Breast Carcinoma and Recurrent/Metastatic Tumors Using Fluorescence In Situ Hybridization on Cytological Samples. Jpn J Clin Oncol 2012; 43:55-62. [DOI: 10.1093/jjco/hys187] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Ito T, Kurita Y, Shinbo H, Otsuka A, Furuse H, Mugiya S, Ushiyama T, Ozono S, Oki Y, Suzuki K. Successful treatment for adrenocorticotropic hormone-independent macronodular adrenal hyperplasia with laparoscopic adrenalectomy: a case series. J Med Case Rep 2012; 6:312. [PMID: 22989371 PMCID: PMC3469390 DOI: 10.1186/1752-1947-6-312] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [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: 01/26/2012] [Accepted: 08/02/2012] [Indexed: 11/22/2022] Open
Abstract
Introduction Adrenocorticotropic hormone-independent macronodular adrenal hyperplasia, characterized by bilateral macronodular adrenal hypertrophy and autonomous cortisol production, is a rare cause of Cushing’s syndrome. Bilateral adrenalectomy is considered the standard treatment for adrenocorticotropic hormone-independent macronodular adrenal hyperplasia but obliges the patient to receive lifetime steroid replacement therapy subsequently, and may increase the patient’s risk of adrenal insufficiency. These circumstances require surgeons to carefully consider operative strategies on an individual basis. Case presentation We performed successful laparoscopic adrenalectomy on four patients with adrenocorticotropic hormone-independent macronodular adrenal hyperplasia. Computed tomography scans showed bilateral adrenal enlargement in all patients. Case 1: a 56-year-old Japanese woman presented with obvious Cushing’s symptoms during treatment for diabetes mellitus and hypertension. Case 2: a 37-year-old Japanese man also presented with Cushing’s symptoms during treatment for diabetes mellitus and hypertension. These patients were diagnosed as Cushing’s syndrome caused by adrenocorticotropic hormone-independent macronodular adrenal hyperplasia based on endocrinologic testing, and underwent bilateral laparoscopic adrenalectomy. Case 3: an 80-year-old Japanese woman was hospitalized due to unusual weight gain and heightened general fatigue, and was diagnosed as Cushing’s syndrome caused by adrenocorticotropic hormone-independent macronodular adrenal hyperplasia. She underwent unilateral laparoscopic adrenalectomy due to high operative risk. Case 4: a 66-year-old Japanese man was discovered to have bilateral adrenal tumors on medical examination. He did not have Cushing’s symptoms and was diagnosed as subclinical Cushing’s syndrome due to suppressed adrenocorticotropic hormone serum levels and loss of cortisol circadian rhythm without abnormal levels of serum cortisol. He underwent unilateral laparoscopic adrenalectomy. During follow-up, serum cortisol levels were within the normal range in all cases, and serum adrenocorticotropic hormone levels were not suppressed. Further, cases with Cushing’s syndrome experienced clinical improvement. Conclusions We were able to effectively treat adrenocorticotropic hormone-independent macronodular adrenal hyperplasia in patients with obvious Cushing’s symptoms by laparoscopic bilateral adrenalectomy, which promptly improved symptoms. Further, unilateral adrenalectomy was effective for treating an older patient at high operative risk and a patient with subclinical Cushing’s syndrome.
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Affiliation(s)
- Toshiki Ito
- Department of Urology, JA Shizuoka Kohseiren Enshu Hospital, 1-1-1 Chuo, Naka-ku, Hamamatsu, Shizuoka, 430-0929, Japan.
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Otabe S, Wada N, Hashinaga T, Yuan X, Shimokawa I, Fukutani T, Tanaka K, Ohki T, Kakino S, Kurita Y, Nakayama H, Tajiri Y, Yamada K. Hyperadiponectinemia protects against premature death in metabolic syndrome model mice by inhibiting AKT signaling and chronic inflammation. J Endocrinol 2012; 213:67-76. [PMID: 22281526 DOI: 10.1530/joe-11-0329] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We previously reported that transgenic (Tg) expression of adiponectin significantly prolonged the lifespan of normal mice. The aim of this study was to elucidate the mechanism involved in the longevity effects of adiponectin using KK/Ta mice, a murine model of metabolic syndrome. We established a Tg line of KK/Ta (Tg-KK/Ta) mice expressing human adiponectin in the liver, and assessed their lifespan. The cause of death was determined by macroscopic and microscopic examinations immediately after death. The expressions of SIRT1, C-reactive protein (CRP), inflammatory cytokines, AMPK, and AKT were measured by quantitative real-time PCR, ELISAs, and/or western blotting. KK/Ta mice had lower serum adiponectin levels and shorter lifespan (57.6±13.9 vs 106.5±18.3 weeks, P<0.0001) than C57BL/6N mice. Tg adiponectin expression significantly extended the lifespan of KK/Ta mice (73.6±16.6 weeks, P<0.001) without affecting body weight, daily food consumption, or plasma glucose levels. Neoplasms were observed in only three of 22 KK/Ta mice that died spontaneously because of tumors. Atherosclerotic lesions were not detected in any mice. SIRT1 levels were not significantly different between KK/Ta and Tg-KK/Ta mice. Gene expressions of Crp, Tnfα, Il6, and Nfκb were increased in KK/Ta mice, but they were significantly attenuated in Tg-KK/Ta mice. Phosphorylated AMPK levels were increased and phosphorylated AKT levels were decreased in Tg-KK/Ta mice. The anti-inflammatory effects of adiponectin, achieved by inhibiting the AKT signaling pathway, may explain how adiponectin slows the accelerated aging process associated with the metabolic syndrome.
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Affiliation(s)
- S Otabe
- Division of Endocrinology and Metabolism, Department of Medicine, Kurume University School of Medicine, 67 Asahimachi, Kurume, Fukuoka, Japan
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Furuse H, Suzuki T, Kai F, Sugiyama T, Nagata M, Otsuka A, Takayama T, Hirano Y, Kurita Y, Mugiya S, Ozono S. UP-03.143 Analysis of Lymphadenectomy During Nephroureterectomy for Upper Urinary Tract Urothelial Carcinoma. Urology 2011. [DOI: 10.1016/j.urology.2011.07.1232] [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: 10/16/2022]
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17
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Suzuki T, Shinbo H, Kurita Y, Furuse H, Mugiya S, Ozono S. [A case of ductal adenocarcinoma of the prostate treated with endocrine therapy and radiation therapy]. Hinyokika Kiyo 2011; 57:261-264. [PMID: 21743285] [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: 05/31/2023]
Abstract
We report a case of ductal adenocarcinoma of the prostate. A 81-year-old man presented with a complaint of microhematuria. Serum prostate specific antigen (PSA) was 18. 44 ng/ml. A cystourethroscopic examination revealed a papillary tumor near the verumontanum. Transurethral resection of the tumor and transrectal prostatic needle biopsy was carried out. The pathological diagnosis was ductal adenocarcinoma and acinar adenocarcinoma of the prostate. The tumor responded to endocrine therapy and radiation therapy. At the follow up at 18 months, the PSA level was in the undetectable range (<0.01 ng/ml), and no reccurence of the tumor was seen. Pathogenesis and management of this rare condition is discussed.
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Affiliation(s)
- Takahisa Suzuki
- The Department of Urology, Hamamatsu University School of Medicine
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Takada S, Kurita Y, Imanishi T, Otsuka A, Shinbo H, Furuse H, Nakanishi T, Suzuki A, Takase H, Ozono S. Reply. Urology 2011. [DOI: 10.1016/j.urology.2010.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Shinbo H, Kurita Y, Takada S, Imanishi T, Otsuka A, Furuse H, Nakanishi T, Mugiya S, Ozono S. Resistive Index as Risk Factor for Acute Urinary Retention in Patients With Benign Prostatic Hyperplasia. Urology 2010; 76:1440-5. [PMID: 20646746 DOI: 10.1016/j.urology.2010.04.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2009] [Revised: 03/27/2010] [Accepted: 04/12/2010] [Indexed: 11/30/2022]
Affiliation(s)
- Hitoshi Shinbo
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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20
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Kyono Y, Takayama T, Kinoshita M, Kurita Y, Mugiya S, Baba S, Ozono S. Combination therapy with sorafenib and S-1 for renal cell carcinoma producing granulocyte colony-stimulating factor. Int J Clin Oncol 2010; 16:275-8. [PMID: 20845054 DOI: 10.1007/s10147-010-0126-x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Accepted: 08/24/2010] [Indexed: 11/27/2022]
Abstract
We present the first case report of the use of sorafenib and S-1 for the treatment of renal cell carcinoma (RCC) producing granulocyte colony-stimulating factor (G-CSF). This entity is clinically rare and has a poor outcome. A 78-year-old Japanese man presented with macrohematuria, left flank pain, and a palpable mass. Laboratory data showed marked leukocytosis with increased serum and urinary G-CSF. The histopathological diagnosis was unclassified RCC. New combination therapy with sorafenib and S-1 exerted a therapeutic effect and apparently decreased serum and urinary G-CSF levels, although the patient died of gastrointestinal perforation. The use of combined sorafenib and S-1 may be worthy of consideration in the treatment of RCC producing G-CSF.
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Affiliation(s)
- Yoko Kyono
- Department of Urology, Hamamatsu University School of Medicine, 1-20-1 Higashi-ku, Handayama, Hamamatsu, Shizuoka 431-3192, Japan
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21
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Kurita Y, Isogai A. Reductive N-alkylation of chitosan with acetone and levulinic acid in aqueous media. Int J Biol Macromol 2010; 47:184-9. [DOI: 10.1016/j.ijbiomac.2010.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 05/03/2010] [Accepted: 05/05/2010] [Indexed: 10/19/2022]
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22
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Shinbo H, Kurita Y, Nakanishi T, Imanishi T, Otsuka A, Furuse H, Mugiya S, Ozono S. Resistive Index: A Newly Identified Predictor of Outcome of Transurethral Prostatectomy in Patients With Benign Prostatic Hyperplasia. Urology 2010; 75:143-7. [DOI: 10.1016/j.urology.2009.08.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Revised: 08/03/2009] [Accepted: 08/06/2009] [Indexed: 10/20/2022]
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23
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Tomiyama T, Watanabe M, Kurita Y. Rapid fluctuation in infection levels of Neoheterobothrium hirame (Monogenea) in Japanese flounder Paralichthys olivaceus in the Joban area, Japan. J Fish Biol 2009; 75:172-185. [PMID: 20738490 DOI: 10.1111/j.1095-8649.2009.02278.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Neoheterobothrium hirame a haematophagous monogenean parasite on Japanese flounder Paralichthys olivaceus occurred at high prevalences (> 70%) from 1999 to 2002 but thereafter declined and remained low (< 20%) from 2003 to 2005 in the Joban area, Japan. In 2006, N. hirame became abundant again reaching a prevalence of 63%. Generalized linear models explained these rapid fluctuations in infection in relation to inshore water temperature, which affected the reproductive success of the parasite, and also the encounter rate between host and parasite through changes in their respective population densities. Severely anaemic fish were few, 2.4% even in 1999-2002 and 2006, suggesting that the effect of N. hirame infection on the P. olivaceus population was small in this area.
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Affiliation(s)
- T Tomiyama
- Fukushima Prefectural Fisheries Experimental Station, Iwaki, Fukushima 970-0316, Japan.
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24
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Liu H, Takayama T, Ogawa H, Kai F, Sugiyama T, Aoki T, Harada M, Otsuka A, Furuse H, Kurita Y, Mugiya S, Ushiyama T, Ozono S. Impact of Thymidine Phosphorylase-Expressing Macrophages for Surgical Margin in Partial Nephrectomy. Urol Int 2009; 82:388-93. [DOI: 10.1159/000218525] [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] [Received: 11/30/2007] [Accepted: 04/28/2008] [Indexed: 11/19/2022]
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25
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Furuse H, Hirano Y, Harada M, Ming LH, Aoki T, Kurita Y, Mugiya S, Ushiyama T, Ozono S. Significance of 5-fluorouracil-related enzyme activities in predicting sensitivity to 5-fluorouracil in bladder carcinoma. Anticancer Res 2009; 29:1001-1008. [PMID: 19414338] [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
BACKGROUND The association between 5-fluorouracil (5-FU)-related enzyme activity and the sensitivity of bladder urothelial carcinoma (BUC) to 5-FU were investigated, and methods to improve 5-FU sensitivity were analyzed. MATERIALS AND METHODS Tumor specimens were obtained from 127 patients. Orotate phosphoribosyl transferase (OPRT) activity was analyzed by the paper disc method and thymidine phosphorylase and dihydropyrimidine dehydrogenase (DPD) activities were measured by ELISA. 5-FU sensitivity was assessed in 99 cases by an in vitro chemosensitivity test. RESULTS A significant positive correlation between OPRT activity level and the sensitivity of BUC to 5-FU was identified. Moreover, the combination of 5-FU and 5-chloro-2,4-dihydroxypyrimidine significantly enhanced 5-FU sensitivity in BUC, particularly in cases showing higher DPD activity. CONCLUSION OPRT was the most important enzyme in predicting sensitivity to 5-FU in BUC. These results may have implications for tailor-made medication using 5-FU-related compounds as postoperative adjuvant chemotherapy in BUC patients.
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Affiliation(s)
- Hiroshi Furuse
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
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Mugiya S, Ozono S, Nagata M, Takayama T, Kurita Y. INVESTIGATION OF PREOPERATIVE SERUM C-REACTIVE PROTEIN LEVEL ON THE PROGNOSIS FOR PATIENTS WITH LOCALIZED RENAL CELL CARCINOMA. J Urol 2009. [DOI: 10.1016/s0022-5347(09)61004-1] [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: 12/01/2022]
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Pham KX, Amano M, Kurita Y, Shimizu A, Fujinami Y, Amiya N, Yamamori K. Changes in the immunostaining intensities of follicle-stimulating hormone and luteinizing hormone during ovarian maturation in the female Japanese flounder. Fish Physiol Biochem 2008; 34:357-365. [PMID: 18958593 DOI: 10.1007/s10695-007-9195-9] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Accepted: 12/10/2007] [Indexed: 05/27/2023]
Abstract
The role of gonadotropin (GTH) in the reproduction of the Japanese flounder, Paralichthys olivaceus, was studied by assessing the changes in the apparent activity of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the pituitary gland during gonadal maturation by immunohistochemical analyses. Corresponding changes in plasma levels of testosterone (T), estradiol-17beta (E(2)), and 17alpha,20beta-dihydroxy-4-pregnen-3-one (DHP) were also studied. Reared fish at the early spawning to termination stages were sampled from May to August and wild fish at the previtellogenic to termination stages were caught at 3- to 4-week intervals between April and September offshore from the northern mainland of Japan by gill nets. The gonadosomatic index of the reared fish decreased from the early spawning stage to the termination stage, while that of the wild fish increased significantly from the previtellogenic stage to the early spawning stage and decreased thereafter. In the reared fish, the immunostaining intensities of FSH and LH were high during the spawning period, accompanied by high plasma levels of T, E(2), and DHP. In the wild fish, the immunostaining intensities of FSH and LH were low during the previtellogenic stage but increased during the maturing and spawning stages. These results indicate that both FSH and LH are likely associated with oocyte maturation in the Japanese flounder.
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Affiliation(s)
- Ky Xuan Pham
- School of Fisheries Sciences, Kitasato University, Ofunato, Iwate 022-0101, Japan
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28
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Otsuka A, Shinbo H, Matsumoto R, Kurita Y, Ozono S. Expression and functional role of beta-adrenoceptors in the human urinary bladder urothelium. Naunyn Schmiedebergs Arch Pharmacol 2008; 377:473-81. [PMID: 18311486 DOI: 10.1007/s00210-008-0274-y] [Citation(s) in RCA: 137] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Accepted: 02/09/2008] [Indexed: 02/04/2023]
Abstract
We investigated the presence of beta-adrenoceptor subtypes in human urinary bladder urothelium and examined whether beta-adrenoceptors in the urothelium modulate the relaxation responses of isolated human detrusor strips to a beta-adrenoceptor agonist. Expression of beta1-, beta2-, and beta3-adrenoceptor mRNA in urothelium and detrusor smooth muscle was determined by reverse transcription-polymerase chain reaction, and the distribution of beta1-, beta2-, and beta3-adrenoceptors in human urinary bladder urothelium were examined by immunohistochemistry. Paired human longitudinal detrusor strips with and without an intact urothelium were suspended in organ baths to construct concentration-response curves to isoproterenol. The possible involvement of urothelium-derived nitric oxide (NO) in this response was examined in additional experiments with urothelium-intact strips in the presence of NG-nitro-L-arginine methylester (L-NAME). Results confirmed the expression of beta1-, beta2-, and beta3-adrenoceptors in the human urinary bladder urothelium. Further, the presence of the urothelium caused a parallel rightward shift of the concentration-response curve to isoproterenol with a significant reduction in potency (pEC50). L-NAME failed to exert any significant effect on the relaxation response to isoproterenol in the urothelium-intact strips. These results confirm the presence of beta1-, beta2-, and beta3-adrenoceptors in human urinary bladder urothelium. Further, they suggest that urothelial beta-adrenoceptors induce the release of a urothelium-derived factor which inhibits the beta-adrenoceptor agonist-induced relaxation of the human detrusor smooth muscle and that this inhibitory mechanism might not involve NO.
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MESH Headings
- Adrenergic beta-Agonists/administration & dosage
- Adrenergic beta-Agonists/pharmacology
- Aged
- Aged, 80 and over
- Dose-Response Relationship, Drug
- Female
- Gene Expression/physiology
- Humans
- Isoproterenol/administration & dosage
- Isoproterenol/pharmacology
- Male
- Middle Aged
- NG-Nitroarginine Methyl Ester/pharmacology
- Nitric Oxide/metabolism
- Receptors, Adrenergic, beta-1/genetics
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/metabolism
- Receptors, Adrenergic, beta-3/genetics
- Receptors, Adrenergic, beta-3/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Urinary Bladder/metabolism
- Urothelium/metabolism
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Affiliation(s)
- Atsushi Otsuka
- Department of Urology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan.
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Abstract
Optical properties in conjugated polymers such as poly(p-phenylenevinylene) and poly(9,9-dialkyl-fluorene) have been studied using time-dependent density functional theory. In the calculations of the optical properties, real-space and real-time techniques are employed. We follow the linear responses of the systems under externally applied perturbations in the real time. To estimate the polymer spectra, we have calculated the responses of oligomers of different lengths and obtained the extrapolated values. The estimated polymer spectra agree with the experiments reasonably well.
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Affiliation(s)
- Y Zempo
- Sumitomo Chemical Co., Ltd, 6 Kitahara, Tsukuba 300-3294, Japan
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Suzuki T, Kurita Y, Nagata M, Otsuka A, Shinbo H, Furuse H, Terada H, Mugiya S, Ushiyama T, Ozono S, Kawasaki H. [Primary ureteral carcinoma composed of both transitional cell carcinoma and mucinous carcinoma: a case report]. Hinyokika Kiyo 2007; 53:883-886. [PMID: 18203527] [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: 05/25/2023]
Abstract
We present a case of primary ureteral carcinoma composed of both transitional cell carcinoma and mucinous carcinoma. A 79-year-old woman visited her home doctor with the chief complaint of right lower abdominal pain. Abdominal computed tomographic scan (CT) disclosed a tumor measuring about 5 cm in diameter at the right lower quadrant of the abdomen. Percutaneous nephrostomy was performed for hydronephrosis and pyonephrosis. The urinary cytology revealed class V, transitional cell carcinoma. Re-abdominal CT showed further enlargement of tumor diameter, but the primary site of the tumor was not identified. Her general condition worsened, and she died 42 days after her initial complaint. Pathologic examinations upon autopsy revealed both mucinous carcinoma and transitional cell carcinoma in the right ureter. Pathogenesis and management of this rare condition are discussed.
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Affiliation(s)
- Takahisa Suzuki
- Department of Urology, Hamamatsu University School of Medicine
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31
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Mukai D, Kishi MJ, Ito SI, Kurita Y. The importance of spawning season on the growth of Pacific saury: A model-based study using NEMURO.FISH. Ecol Modell 2007. [DOI: 10.1016/j.ecolmodel.2006.08.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Takahashi A, Takase H, Toriyama T, Sugiura T, Kurita Y, Ueda R, Dohi Y. Candesartan, an angiotensin II type-1 receptor blocker, reduces cardiovascular events in patients on chronic haemodialysis--a randomized study. Nephrol Dial Transplant 2006; 21:2507-12. [PMID: 16766543 DOI: 10.1093/ndt/gfl293] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Cardiovascular events are the major determinants of the prognosis of patients on chronic haemodialysis. The present study was designed to investigate whether candesartan, an angiotensin II type-1 receptor blocker, reduces the incidence of cardiovascular events in these patients. METHODS A total of 80 chronic haemodialysis patients (male/female, 47/33; mean age +/- SEM, 61 +/- 1 years) in stable condition and with no clinical evidence of cardiac disorders were enrolled. Patients were randomly assigned candesartan 4-8 mg/day (candesartan group; n = 43) or nothing (control group; n = 37), and followed for 19.4 +/- 1.2 months with as endpoint cardiovascular events such as fatal/nonfatal myocardial infarction, unstable angina pectoris, congestive heart failure, severe arrhythmia and sudden death. RESULTS Both groups exhibited similar clinical characteristics at baseline. During follow-up, cardiovascular events occurred in seven patients in the candesartan group and 17 in the control group. Kaplan-Meier analysis revealed that cardiovascular events and mortality rates were significantly (P < 0.01) higher in the control group than in the candesartan group (45.9 vs 16.3% and 18.9 vs 0.0%, respectively). CONCLUSIONS Candesartan therapy significantly reduces cardiovascular events and mortality in patients on chronic maintenance haemodialysis and therefore improves the prognosis of these patients.
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Affiliation(s)
- Akihiko Takahashi
- Department of Internal Medicine, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan.
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Kurita Y, Ikeda A, Jun Ueda, Ogasawara T. A fingerprint pointing device utilizing the deformation of the fingertip during the incipient slip. IEEE T ROBOT 2005. [DOI: 10.1109/tro.2005.847568] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Campbell BJ, Rosenkranz S, Chupas PJ, Kang HJ, Dai P, Kurita Y, Komiya S, Ando Y. Diffuse scattering study of 2D superstructure in a T' electron-doped cuprate superconductor. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305099071] [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: 11/11/2022] Open
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35
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Tsuru N, Kurita Y, Suzuki K, Fujita K. Resistance index in benign prostatic hyperplasia using power doppler imaging and clinical outcomes after transurethral vaporization of the prostate. Int J Urol 2005; 12:264-9. [PMID: 15828953 DOI: 10.1111/j.1442-2042.2005.01025.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Using power Doppler ultrasonography (PDUS), we investigate the change of resistance index (RI) before and after transurethral vaporization of the prostate (TUVP) in benign prostatic hyperplasia (BPH) patients. METHODS In all, 49 patients underwent transrectal PDUS before receiving TUVP, three were excluded because of cancer and three could not be followed up. The remaining 43 were enrolled in the present study. Patients were assessed before and 1, 3 and 6 months after surgery, giving a mean duration of follow-up of 9.1 months. International prostate symptom scores (IPSS), quality of life (QOL) scores, postvoiding residual urine volumes (PVR) and maximum urinary flow rates (Qmax) were evaluated and total prostatic volume (TPV) and RI were measured using PDUS. RESULTS Resistance index ranged from 0.64 to 0.91. The postoperative parameters except for RI, such as TPV, PVR, IPSS and QOL scores improved significantly at the follow-up assessment after surgery. The elevated RI decreased significantly 1, 3 and 6 months after the treatment. Resistance index significantly decreased after TUVP and IPSS and other urodymamics parameters improved. CONCLUSIONS The present study suggested that RI could evaluate the severity of BPH and the degree of intraprostatic pressure or bladder outlet obstruction.
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Affiliation(s)
- Nobuo Tsuru
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
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36
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Ando Y, Komiya S, Segawa K, Ono S, Kurita Y. Electronic phase diagram of high-Tc cuprate superconductors from a mapping of the in-plane resistivity curvature. Phys Rev Lett 2004; 93:267001. [PMID: 15698007 DOI: 10.1103/physrevlett.93.267001] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2004] [Indexed: 05/24/2023]
Abstract
We propose that resistivity curvature mapping (RCM) based on the in-plane resistivity data is a useful way to objectively draw electronic phase diagrams of high-Tc cuprates, where various crossovers are important. In particular, the pseudogap crossover line can be conveniently determined by RCM. We show experimental phase diagrams obtained by RCM for Bi2Sr2-zLazCuO6+delta, La2-xSrxCuO4, and YBa2Cu3Oy, and demonstrate the universal nature of the pseudogap crossover. Intriguingly, the electronic crossover near optimum doping depicted by RCM appears to occur rather abruptly, suggesting that the quantum-critical regime, if it exists, must be very narrow.
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Affiliation(s)
- Yoichi Ando
- Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan.
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37
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Lavrov AN, Kang HJ, Kurita Y, Suzuki T, Komiya S, Lynn JW, Lee SH, Dai P, Ando Y. Spin-flop transition and the anisotropic magnetoresistance of Pr(1.3-x)La(0.7)CexCuO4: unexpectedly strong spin-charge coupling in the electron-doped cuprates. Phys Rev Lett 2004; 92:227003. [PMID: 15245253 DOI: 10.1103/physrevlett.92.227003] [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: 10/20/2003] [Indexed: 05/24/2023]
Abstract
We use transport and neutron-scattering measurements to show that a magnetic-field-induced transition from noncollinear to collinear spin arrangement in adjacent CuO2 planes of lightly electron-doped Pr(1.3-x)La(0.7)CexCuO4 (x=0.01) crystals affects significantly both the in-plane and out-of-plane resistivity. In the high-field collinear state, the magnetoresistance (MR) does not saturate but exhibits an intriguing fourfold-symmetric angular dependence, oscillating from being positive at B//[100] to being negative at B//[110]. The observed MR of more than 30% at low temperatures induced by a modest modification of the spin structure indicates an unexpectedly strong spin-charge coupling in electron-doped cuprates.
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Affiliation(s)
- A N Lavrov
- Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan
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Ando Y, Kurita Y, Komiya S, Ono S, Segawa K. Evolution of the Hall coefficient and the peculiar electronic structure of the cuprate superconductors. Phys Rev Lett 2004; 92:197001. [PMID: 15169436 DOI: 10.1103/physrevlett.92.197001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2003] [Indexed: 05/24/2023]
Abstract
Although the Hall coefficient R(H) is an informative transport property of metals and semiconductors, its meaning in the cuprate superconductors has been ambiguous because of its unusual characteristics. Here we show that a systematic study of R(H) in La2-xSrxCuO4 single crystals over a wide doping range establishes a qualitative understanding of its peculiar evolution, which turns out to reflect a two-component nature of the electronic structure caused by an unusual development of the Fermi surface recently uncovered by photoemission experiments.
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Affiliation(s)
- Yoichi Ando
- Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan.
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Sun XF, Kurita Y, Suzuki T, Komiya S, Ando Y. Thermal conductivity of Pr1.3-xLa0.7CexCuO4 single crystals and signatures of stripes in an electron-doped cuprate. Phys Rev Lett 2004; 92:047001. [PMID: 14995395 DOI: 10.1103/physrevlett.92.047001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2003] [Indexed: 05/24/2023]
Abstract
It was recently demonstrated that the anisotropic phonon heat transport behavior is a good probe of the stripe formation in La(2-x)Sr(x)CuO(4) (LSCO) [Phys. Rev. B 67, 104503 (2003)]]. Using this probe, we examined an electron-doped cuprate Pr(1.3-x)La(0.7)Ce(x)CuO(4) (PLCCO) and found that essentially the same features as those in LSCO are observed. Moreover, the in-plane resistivity rho(ab) of lightly doped PLCCO shows metallic behavior (drho(ab)/dT>0) in the Néel ordered state with a mobility comparable to that in LSCO. It is discussed that these peculiar properties in common with LSCO signify the existence of stripes in electron-doped cuprates.
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Affiliation(s)
- X F Sun
- Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan
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Goto T, Takase H, Toriyama T, Sugiura T, Kurita Y, Tsuru N, Masuda H, Hayashi K, Ueda R, Dohi Y. Increased circulating levels of natriuretic peptides predict future cardiac event in patients with chronic hemodialysis. Nephron Clin Pract 2003; 92:610-5. [PMID: 12372945 DOI: 10.1159/000064100] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Cardiovascular events are the major determinant of the prognosis in patients with chronic hemodialysis. The present study was designed to investigate whether increased plasma levels of atrial or brain natriuretic peptides (ANP or BNP) predict future cardiac events in such patients. METHODS Fifty-three patients undergoing chronic hemodialysis without clinical symptoms suggestive of cardiac disorders were enrolled and their blood was sampled for ANP and BNP measurements. Electrocardiograms demonstrated left ventricular hypertrophy in 28 patients but no other abnormal findings. We followed them up for 11.3 +/- 0.2 months. The endpoint was cardiac events. RESULTS Cardiac events occurred in 13 patients (CE group). Both ANP and BNP levels were higher in CE group than in patients without cardiac events (ANP: 118 +/- 21 vs. 56 +/- 5 pg/ml, BNP: 769 +/- 204 vs. 193 +/- 25 pg/ml, respectively). Receiver operating characteristics curve revealed that the cut-off levels of ANP and BNP were 58 and 390 pg/ml, respectively. Using the Kaplan-Meier method, the incidence of cardiac events was significantly greater in patients with higher levels of ANP (50.0 vs. 0.0%) or BNP (72.7 vs. 11.9%) than in those with lower levels of the peptides. CONCLUSIONS Elevated levels of ANP or BNP indicate an increased risk of cardiac events and these peptides are clinically useful to predict cardiac events in patients with hemodialysis.
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Affiliation(s)
- Takatoshi Goto
- Department of Internal Medicine, Enshu General Hospital, Hamamatsu, Japan
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41
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Hayami S, Ushiyama T, Kurita Y, Kageyama S, Suzuki K, Fujita K. The value of power Doppler imaging to predict the histologic components of benign prostatic hyperplasia. Prostate 2002; 53:168-74. [PMID: 12242732 DOI: 10.1002/pros.10153] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND The response of symptoms caused by benign prostate hypertrophy (BPH) to alpha blockade is related to the area density of the smooth muscle of the prostate. If this density could be determined by ultrasound examination, ultrasound might be useful in predicting the efficacy of alpha-blocker therapy. In this study, various ultrasonographic parameters obtained by transrectal method (TRUS) were compared with histologically measured components. METHODS Before surgery, ultrasonic power Doppler imaging (PDI) of the prostate was performed using a transrectal probe. The volume of total prostate, transition zone (TZ), and the presumed circle area ratio (PCAR) [1,2] were calculated. Pulsatile blood flow was recorded, and the resistive index (RI) was calculated. Based on the serum concentration of total prostate specific antigen (PSA), ratio of PSA to prostate volume (PSAD), and ratio of PSA to TZ (PSAT) were calculated. Prostate tissues were obtained from 26 patients undergoing transurethral resection, suprapubic prostatectomy, or radical cystectomy, and were analyzed by quantitative morphometry. Computer image analysis was used to determine the mean area densities of the smooth muscle (SM), connective tissue (CT), glandular epithelium (GE) and lumen (GL), and vascular lumen (V). Correlations between ultrasonographic parameters and morphometric data were studied. RESULTS On microscopic examination, the specimens showed a wide variety, ranging from normal prostate to typical glandular hyperplasia. There was a correlation between RI and the ratios of the four components (SM: r = -0.42 P = 0.034; CT: r = -0.42 P = 0.030; GE: r = 0.42 P = 0.032; GL: r = 0.46 P = 0.018). However, correlations between the other five transrectal parameters and the composition of the prostate were not so clear. This may have been because the blood vessels are compressed within the surgical capsule together with the urethra. CONCLUSIONS The present study demonstrates that when RI is calculated by PDI, it can be quite useful for predicting component ratios, thereby making it possible to predict the therapeutic efficacy of alpha-blockers in individual patients.
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Affiliation(s)
- Shinsuke Hayami
- Department of Urology, Hamamatsu University School of Medicine, Japan.
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Abstract
BACKGROUND The aim of the present study was to assess the resistive index in patients with benign prostatic hypertrophy (BPH) and the role of power Doppler ultrasonography. METHODS From April 1996 to December 1997, a total of 214 men aged 48-86 years with symptoms of BPH were prospectively enrolled to participate in our study. All patients presented to our clinic with lower urinary tract symptoms. Transrectal ultrasonography was used to calculate the total prostate volume (TPV), transition zone (TZ) volume, transition zone index (TZI = TZ volume/TPV) and presumed circle area ratio (PCAR). Power Doppler imaging was used to identify the capsular and urethral arteries of the prostate and measure its resistive index (RI) value. RESULTS The RI of capsular arteries significantly correlated with theTPV, TZ volume, TZI (r = 0.470; P < 0.0001) and PCAR (r = 0.334; P < 0.0001). Correlations were found between the RI of capsular arteries and the International Prostatic Symptom Score (IPSS) (r = 0.389; P < 0.0001), peak flow rate of uroflowmetry (r = -0.393; P < 0.0001). CONCLUSION We demonstrated that an increase of the RI of capsular arteries correlated with increases in the TZI and PCAR in BPH. The lower IPSS and peak flow rate correlated with the high RI of capsular arteries; however, no correlation between the RI of urethral arteries and prostatic parameters was found. The findings suggested that the RI of capsular arteries may become the index for measuring lower urinary obstruction in the future.
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Affiliation(s)
- Nobuo Tsuru
- Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
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Sato T, Mitamura H, Kurita Y, Takeshita A, Shinagawa K, Miyoshi S, Kanki H, Hara M, Ogawa S. Electropharmacologic effects of pilsicainide, a pure sodium channel blocker, on the remodeled atrium subjected to chronic rapid pacing. J Cardiovasc Pharmacol 2001; 38:812-20. [PMID: 11707684 DOI: 10.1097/00005344-200112000-00002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Clinical experience suggests that sodium channel blockers are effective in converting atrial fibrillation of recent onset but not chronic atrial fibrillation. We investigated changes in the electrophysiologic effects of pilsicainide, a pure sodium channel blocker, on the canine atrium during chronic rapid pacing (400/min). Three pairs of bipolar electrodes were sutured to the right atrial appendage in six dogs. Five days later, rapid atrial pacing was started after baseline measurements of the effective refractory period (ERP), the intra-atrial conduction velocity, the atrial wavelength, and the inducibility of atrial fibrillation. These studies were repeated at 2, 7, and 14 days of pacing, both before and after pilsicainide administration. Before pacing, pilsicainide increased ERP more than it decreased conduction velocity, causing an increase of wavelength, particularly at faster rates. However, this use-dependent prolongation of ERP disappeared after 2 days of pacing. Thus, pilsicainide failed to prolong ERP during chronic pacing, allowing progressive shortening of wavelength in the remodeled atrium. The effect of sodium channel blockers on atrial refractoriness may decline as rapid atrial excitation persists, limiting the usefulness of these agents for the treatment of chronic atrial fibrillation.
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Affiliation(s)
- T Sato
- Cardiopulmonary Division, Department of Medicine, Keio University, School of Medicine, Tokyo, Japan.
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Tsukada H, Hirose T, Yokoyama A, Kurita Y. Randomised comparison of ondansetron plus dexamethasone with dexamethasone alone for the control of delayed cisplatin-induced emesis. Eur J Cancer 2001; 37:2398-404. [PMID: 11720834 DOI: 10.1016/s0959-8049(01)00326-4] [Citation(s) in RCA: 38] [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: 11/20/2022]
Abstract
The role of 5-hydroxytryptamine(3) (HT(3)) antagonists in the treatment of delayed emesis is still controversial. To evaluate whether 5-HT(3) antagonists can add to the efficacy of corticosteroids in controlling delayed emesis, we performed a randomised, prospective, open study comparing ondansetron plus dexamethasone with dexamethasone alone in cisplatin-treated patients. 149 cisplatin-naïve patients with lung cancer received at least 60 mg/m(2) of cisplatin and were treated with dexamethasone 32 mg intravenously (i.v.) and granisetron 3 mg i.v. on day 1. Patients were randomly assigned to receive either dexamethasone 16 mg i.v. alone (arm A) or dexamethasone plus ondansetron 8 mg daily (arm B) on days 2-4. None of the efficacy variables related to control of delayed emesis differed significantly between the two arms. In conclusion, there does not appear to be sufficient evidence to support the prolonged use of 5-HT(3) receptor antagonists after 24 h of cisplatin-containing chemotherapy.
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Affiliation(s)
- H Tsukada
- Department of Internal Medicine, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-cho, Niigata, 951-8566, Japan.
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Kunikane H, Kurita Y, Watanabe K, Yokoyama A, Noda K, Fujita Y, Yoneda S, Nakai Y, Niitani H. A study of the combination of gemcitabine hydrochloride (LY188011) and cisplatin in non-small-cell lung cancer: 3-week schedule. Int J Clin Oncol 2001; 6:284-90. [PMID: 11828947 DOI: 10.1007/s10147-001-8029-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND It has been reported that the combination of gemcitabine (LY188011; GEM) and cisplatin (CDDP) in a 4-week schedule showed a high response rate for patients with non-small-cell lung cancer (NSCLC), but GEM could not be administered on day 15 because of increased myelosuppression in many patients. The present study was performed to evaluate the efficacy and safety of GEM and CDDP in a 3-week schedule. METHODS Patients with unresectable NSCLC without prior chemotherapy were enrolled. We administered 1000 mg/m2 of GEM on days 1 and 8, and 80 mg/m2 of CDDP on day 1. The feasibility of the combination therapy was confirmed in 8 patients, and then 20 more patients were enrolled, to evaluate the efficacy and safety of this combination therapy for all 28 patients. RESULTS The response rate was 42.9% (12/28) and the median survival time was 12.6 months. Neutropenia, leukopenia, anemia, thrombocytopenia or lymphocytopenia of grade 3 or higher were observed as hematological toxicity, and anorexia, nausea, fatigue, or vomiting of grade 3 were the nonhematological toxicities, but most of these toxicities were of grade 2 or less. For GEM and CDDP, 89% and 91% of the scheduled doses, respectively, were administered. CONCLUSION This is the first study of the combination of GEM and CDDP with a 3-week schedule in Japan, and the results showed a low level of myelosuppression, high dose intensity, and high response rate, similar to the results reported in other countries. Accordingly, the combination of GEM and CDDP with a 3-week schedule may be a promising regimen for the treatment of NSCLC in Japan.
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Affiliation(s)
- H Kunikane
- Department of Respiratory Medicine, Yokohama Municipal Citizen's Hospital, 56 Okazawacho, Hodogaya-ku, Yokohama 240-8555, Japan.
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Tsukada H, Kurita Y, Yokoyama A, Wakai S, Nakayama T, Sagawa M, Misawa H. An evaluation of screening for lung cancer in Niigata Prefecture, Japan: a population-based case-control study. Br J Cancer 2001; 85:1326-31. [PMID: 11720469 PMCID: PMC2375248 DOI: 10.1054/bjoc.2001.2060] [Citation(s) in RCA: 37] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Although an annual screening programme for lung cancer has been carried out widely in Japan since 1987, there is insufficient evidence to confirm its efficacy in terms of reducing mortality. In order to evaluate the efficacy of the lung cancer screening which has been widely carried out in Japan since 1987, a case-control study was conducted in Niigata Prefecture, Japan. In the study area, chest X-ray examinations for all participants and sputum cytology for high-risk participants were offered annually. Case subjects, who had died from lung cancer (174), and control subjects matched by sex, year of birth, residence and smoking status (801), who had been alive at the time of diagnosis of the corresponding case, were selected from the National Health Insurance holders. Screening histories of the subjects were compared between cases and matched controls for the identical calendar period before the time of diagnosis of the cases. The odds ratio of death from lung cancer for those screened within 12 months vs those not screened was 0.401 (95% CI: 0.272-0.591) with adjustment by smoking index. Our results suggest that annual lung cancer screening might reduce mortality from lung cancer by approximately 60%.
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Affiliation(s)
- H Tsukada
- Department of Internal Medicine, Niigata Cancer Center Hospital, Niigata, Japan
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Sato T, Mitamura H, Kurita Y, Takeshita A, Shinagawa K, Miyoshi S, Kanki H, Hara M, Takatsuki S, Soejima K, Ogawa S. Recovery of electrophysiological parameters after conversion of atrial fibrillation. Int J Cardiol 2001; 79:183-9. [PMID: 11461740 DOI: 10.1016/s0167-5273(01)00419-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
We investigated the recovery of electrophysiological parameters from electrical remodeling after conversion of chronic lone atrial fibrillation in humans. Clinical studies have shown that the longer atrial fibrillation lasts, the more difficult it becomes to maintain the sinus rhythm after cardioversion. To explore the effects of the duration of atrial fibrillation on changes of electrophysiological parameters after conversion, we determined the atrial effective refractory period and P wave duration during right atrial pacing at 1 and 24 h after electrical cardioversion in 15 patients with chronic lone atrial fibrillation (median duration, 6 months). By 24 h after cardioversion, the effective refractory period at a pacing cycle length of 600 ms increased from 225+/-19 to 254+/-27 ms. However, the P wave duration did not decrease significantly 24 h after conversion. As the duration of atrial fibrillation became longer, the prolongation of effective refractory period was more delayed (P<0. 001, r=0.82), and the shortening of P wave duration was significantly smaller within 24 h after cardioversion (P<0. 001, r=0.67). After cardioversion of chronic lone atrial fibrillation, the recovery of shortened atrial refractoriness and prolonged intraatrial conduction time is dependent on the duration of preexisting atrial fibrillation.
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Affiliation(s)
- T Sato
- Cardiopulmonary Division, Department of Medicine, Keio University School of Medicine, 35 Shinanomachi Shinjuku-ku, Tokyo 160-8582, Japan.
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Takayama T, Kato Y, Tsuru N, Takada S, Kurita Y, Ihara H, Kageyama S, Ishikawa A, Mugiya S, Ushiyama T, Suzuki K, Fujita K. [A case of pheochromocytoma with von Recklinghausen's and review of 67 Japanese cases]. Nihon Hinyokika Gakkai Zasshi 2001; 92:479-83. [PMID: 11398324 DOI: 10.5980/jpnjurol1989.92.479] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A 19-year-old woman with von Recklinghausen's disease was referred to our hospital because of right adrenal pheochromocytoma. The tumor was detected incidentally with the abdominal ultrasonography when she complained epigastralgia to the home doctor who treated her hypertension. Plasma and urinary catecholamines level were elevated. The tumor was removed by laparoscopy assisted adrenalectomy without pneumoperitoneum. The resected specimen was 35 x 60 x 75 mm in size and weighed 70 g. Pathological diagnosis was adrenomedullary pheochromocytoma. Postoperative course was uneventful. She has been well with no signs of recurrence after 7.5 years. We reviewed 67 Japanese patients previously reported as von Recklinghusen's disease with pheochromocytoma. Of the 60 patients whose details were described, 16.7% had metastases and pathological malignancy from pheochromocytoma.
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Affiliation(s)
- T Takayama
- Department of Urology, Hamamatsu University School of Medicine
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Kurita Y, Suzuki A, Masuda H, Ushiyama T, Suzuki K, Fujita K. Transition zone volume-adjusted prostate-specific antigen value predicts extracapsular carcinoma of the prostate in patients with intermediate prostate-specific antigen levels. Eur Urol 2000; 33:32-8. [PMID: 9471039 DOI: 10.1159/000019532] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE The aim of the present study was to examine the efficacy of the volume-adjusted prostate-specific antigen (PSA) density as a predictor of pathological stage. Among patients who underwent radical prostatectomy for clinically organ-confined prostate cancer, we selected patients with PSA levels of 4-10 ng/ml. In these patients with borderline PSA value extent of disease is most difficult to predict. Using the transition zone (TZ) volume instead of the total prostate volume, we compared the ability of PSA to predict the tumor extent. METHODS From April 1992 to November 1996, we examined 61 consecutive patients who underwent radical prostatectomy. Their age ranged from 52 to 78 years. The PSA densities for the total prostate volume (PSAD) and for the TZ volume (PSAT) were calculated by transrectal ultrasound examinations. To compare the usefulness of PSA, PSAD, and PSAT, the area under the receiver-operator characteristic (ROC) curve was calculated for each parameter. RESULTS The final pathological stage was pT2N0M0 in 34 patients, pT3N0M0 in 20 patients, and pT3N1M0 in 7 patients. Accordingly, 34 patients (55.7%) had organ-confined prostate cancer. In patients with capsular perforation, the areas under the ROC curve were 0.686 for PSA, 0.665 for PSAD, and 0.860 for PSAT, while in those with seminal vesicle invasion the respective values were 0.712, 0.703, and 0.882. Thus, PSAT was superior to PSA and PSAD in differentiating extracapsular disease. CONCLUSION PSAT provides superior preoperative prediction of extracapsular tumor invasion, which appears to be useful in treatment selection (e.g. total prostatectomy).
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Affiliation(s)
- Y Kurita
- Department of Urology, Hamamatsu University School of Medicine, Japan
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Abstract
BACKGROUND With the increasing use of mass screening programs for lung cancer, and especially the use of sputum cytology, the incidence of roentgenographically occult lung cancer has been increasing. These occult cancers comprise mainly histologically centrally-located early stage lung cancers. This study examined the clinicopathologic characteristics and surgical results of centrally-located early stage lung cancer. RESULTS From 1980 to 1998, there were 98 patients and 99 lesions of centrally-located early stage lung cancer resected. A total of 64 patients were detected by mass screening. Histologic examination revealed that 96 lesions were squamous cell carcinoma, and in these patients, there were 10 lesions of carcinoma in situ. The 5-year survival rate was 81.4% in all patients, and 88.9% in carcinoma in situ patients. In the postoperative follow-up period, a second lung cancer occurred in 13 patients. CONCLUSIONS The surgical results for centrally-located early lung cancer were good. However, sometimes these cancers are accompanied by a second centrally-located primary lung cancer, so it is necessary to follow-up with sputum cytology to allow early detection of additional centrally-located lung cancer.
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Affiliation(s)
- T Koike
- Division of Chest Surgery, Niigata Cancer Center Hospital, Japan.
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