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Abstract
PURPOSE Elbow fractures are common in children and occur during daily activities. The aim of this study is to evaluate the epidemiology of paediatric elbow fractures over a two-year period in Okinawa, a southern subtropical island in Japan. METHODS This was a retrospective study of 488 elbow fractures in children younger than 15 years old treated at 11 hospitals in Okinawa. Data included age, gender, calendar month, type of fracture, operation rate, mechanism of injury, and aetiology. RESULTS The most frequent age was 6 years old, with 47.5% of all elbow fractures occurring in an age range from 6 to 10 years old. The fracture rate for boys was 1.6 times higher than that for girls. The incidence was the highest in May (56 fractures) and the lowest in August (25 fractures). Supracondylar fractures were the most common type (44%), followed by lateral condyle fractures (22%); 45% of all fractures were treated operatively. Medial epicondyle fractures had the highest rate of operative treatment (91%). In the 6 to 10-year-old group, 19% of all fractures occurred while skateboarding or caster-boarding, the most frequent aetiology. CONCLUSIONS Supracondylar fractures are the most common fracture type in 4 to 7-year-old boys. In the 6 to 10-year-old group, skateboarding and caster-boarding are the most frequent and increasing cause of elbow fractures. Therefore, some preventive measures are needed. LEVEL OF EVIDENCE Level IV, case series.
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Affiliation(s)
- H. Okubo
- Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Japan,Correspondence should be sent to: H. Okubo, Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa, Japan 903-0215. E-mail:
| | - M. Nakasone
- Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Japan
| | - M. Kinjo
- Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Japan
| | - K. Onaka
- Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Japan
| | - C. Futenma
- Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Japan
| | - F. Kanaya
- Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Japan
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2
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Yoshida T, Sueyoshi T, Suwazono S, Kinjo M, Nodera H. Detection of atrophy of dorsal root ganglion with 3-T magnetic resonance neurography in sensory ataxic neuropathy associated with Sjögren's syndrome. Eur J Neurol 2018; 25:e78-e79. [PMID: 29913055 DOI: 10.1111/ene.13647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 03/22/2018] [Indexed: 11/26/2022]
Affiliation(s)
- T Yoshida
- Rheumatology, Okinawa Chubu Hospital, Uruma, Japan.,Neurology, Tokushima University School of Medicine, Tokushima, Japan
| | - T Sueyoshi
- Radiology, Minei Daiichi Hospital, Urasoe, Japan
| | - S Suwazono
- Neurology, National Hospital Organization Okinawa Hospital, Ginowan, Japan
| | - M Kinjo
- Rheumatology, Okinawa Chubu Hospital, Uruma, Japan
| | - H Nodera
- Neurology, Tokushima University School of Medicine, Tokushima, Japan
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3
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Boonsaen P, Kinjo M, Sawanon S, Suzuki Y, Koike S, Kobayashi Y. Partial characterization of phylogeny, ecology and function of the fibrolytic bacteriumRuminococcus flavefaciens OS14, newly isolated from the rumen of swamp buffalo. Anim Sci J 2017; 89:377-385. [DOI: 10.1111/asj.12927] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 08/17/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Phoompong Boonsaen
- Department of Animal Science; Faculty of Agriculture at Kamphaeng Saen; Kasetsart University; Nakhon Pathom Thailand
- Center for Advanced Studies for Agriculture and Food; Kasetsart University Institute for Advanced Studies; Kasetsart University; Bangkok Thailand
| | - Madoka Kinjo
- Laboratory of Animal Function and Nutrition; Research Faculty of Agriculture; Hokkaido University; Sapporo Japan
| | - Suriya Sawanon
- Department of Animal Science; Faculty of Agriculture at Kamphaeng Saen; Kasetsart University; Nakhon Pathom Thailand
- Center for Advanced Studies for Agriculture and Food; Kasetsart University Institute for Advanced Studies; Kasetsart University; Bangkok Thailand
| | - Yutaka Suzuki
- Laboratory of Animal Function and Nutrition; Research Faculty of Agriculture; Hokkaido University; Sapporo Japan
| | - Satoshi Koike
- Laboratory of Animal Function and Nutrition; Research Faculty of Agriculture; Hokkaido University; Sapporo Japan
| | - Yasuo Kobayashi
- Laboratory of Animal Function and Nutrition; Research Faculty of Agriculture; Hokkaido University; Sapporo Japan
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4
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Yoshida T, Kinjo M, Suwazono S, Sueyoshi T. Detection of dorsal root ganglionitis with magnetic resonance neurography in ataxic and painful neuropathy associated with Sjogren’s syndrome. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2566] [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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5
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Zhang X, Wen H, Fan J, Vince B, Li T, Gao W, Kinjo M, Brown J, Sun W, Jiang W, Lionberger R. Integrating In Vitro, Modeling, and In Vivo Approaches to Investigate Warfarin Bioequivalence. CPT Pharmacometrics Syst Pharmacol 2017; 6:523-531. [PMID: 28379643 PMCID: PMC5572358 DOI: 10.1002/psp4.12198] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 02/21/2017] [Accepted: 03/28/2017] [Indexed: 11/21/2022]
Abstract
We demonstrate the use of modeling and simulation to investigate bioequivalence (BE) concerns raised about generic warfarin products. To test the hypothesis that the loss of isopropyl alcohol and slow dissolution in acidic pH has significant impact on the pharmacokinetics of warfarin sodium tablets, we conducted physiologically based pharmacokinetic absorption modeling and simulation using formulation factors or in vitro dissolution profiles as input parameters. Sensitivity analyses indicated that warfarin pharmacokinetics was not sensitive to solubility, particle size, density, or dissolution rate in pH 4.5, but was affected by dissolution rate in pH 6.8 and potency. Virtual BE studies suggested that stressed warfarin sodium tablets with slow dissolution rate in pH 4.5 but having similar dissolution rate in pH 6.8 would be bioequivalent to the unstressed warfarin sodium tablets. A four‐way, crossover, single‐dose BE study in healthy subjects was conducted to test the same hypothesis and confirmed the simulation conclusion.
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Affiliation(s)
- X Zhang
- Office of Generic Drugs, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - H Wen
- Office of Generic Drugs, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - J Fan
- Office of Generic Drugs, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - B Vince
- Vince and Associates Clinical Research Inc, Overland Park, Kansas, USA
| | - T Li
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana, USA
| | - W Gao
- Department of Industrial and Physical Pharmacy, Purdue University, West Lafayette, Indiana, USA
| | - M Kinjo
- Office of Generic Drugs, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - J Brown
- Office of Translational Sciences, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - W Sun
- Office of Translational Sciences, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - W Jiang
- Office of Generic Drugs, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - R Lionberger
- Office of Generic Drugs, US Food and Drug Administration, Silver Spring, Maryland, USA
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6
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Kinjo M, Fukada S, Katayama K, Edao Y, Hayashi T. Experiment on Recovery of Hydrogen Isotopes from Li 17Pb 83 Blanket by Liquid-Gas Contact. Fusion Science and Technology 2017. [DOI: 10.1080/15361055.2017.1293426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. Kinjo
- Kyushu University , Dept. Advanced Energy Engineering Science, Kasuga-Koen 6-1, Kasuga, Fukuoka 816-8580, Japan
| | - S. Fukada
- Kyushu University , Dept. Advanced Energy Engineering Science, Kasuga-Koen 6-1, Kasuga, Fukuoka 816-8580, Japan
| | - K. Katayama
- Kyushu University , Dept. Advanced Energy Engineering Science, Kasuga-Koen 6-1, Kasuga, Fukuoka 816-8580, Japan
| | - Y. Edao
- Quantum Science and Technology Development Agency , Tritium Process Laboratory, Ibaraki 319-1184, Japan
| | - T. Hayashi
- Quantum Science and Technology Development Agency , Tritium Process Laboratory, Ibaraki 319-1184, Japan
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7
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Nakanishi K, Kinjo M. AB0463 Clinical Characteristics of Elderly Patients with Primary Sjögren's Syndrome. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3558] [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: 11/03/2022]
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8
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Nakanishi K, McGill R, Kinjo M. FRI0412 Urinalysis Findings and Renal Pathology in Japanese Patients with Lupus Nephritis: Table 1. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2834] [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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9
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Sasaki Y, Taniguchi T, Kinjo M, McGill RL, McGill AT, Tsuha S, Shiiki S. Meningitis associated with strongyloidiasis in an area endemic for strongyloidiasis and human T-lymphotropic virus-1: a single-center experience in Japan between 1990 and 2010. Infection 2013; 41:1189-93. [PMID: 23761268 PMCID: PMC3832757 DOI: 10.1007/s15010-013-0483-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 05/22/2013] [Indexed: 11/30/2022]
Abstract
Meningitis caused by enteric flora is a known complication of strongyloidiasis, and human T-lymphotropic virus-1 (HTLV-1) predisposes individuals to severe strongyloidiasis. We reviewed the clinical features of bacterial meningitis associated with strongyloidiasis seen at a single center in subtropical Japan, in an area endemic for both strongyloidiasis and HTLV-1. We found 33 episodes in 21 patients between 1990 and 2010. The results were remarkable for the high incidence of meningitis due to Gram-positive cocci (27.3 %), especially Streptococcus bovis, and culture-negative cases (42.4 %). Given the high incidence of Gram-positive meningitis, a modified approach to corticosteroid use would be advisable in areas where strongyloidiasis is endemic, due to the potentially adverse consequences of glucocorticoid therapy.
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Affiliation(s)
- Y Sasaki
- Department of Medicine, Okinawa Chubu Hospital, Okinawa, Japan,
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10
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Yamagishi K, Iso H, Kokubo Y, Saito I, Yatsuya H, Ishihara J, Inoue M, Tsugane S, Sobue T, Hanaoka T, Ogata J, Baba S, Mannami T, Okayama A, K. Y, Miyakawa K, Saito F, Koizumi A, Sano Y, Hashimoto I, Ikuta T, Tanaba Y, Miyajima Y, Suzuki N, Nagasawa S, Furusugi Y, Nagai N, Sanada H, Hatayama Y, Kobayashi F, Uchino H, Shirai Y, Kondo T, Sasaki R, Watanabe Y, Miyagawa Y, Kobayashi Y, Machida M, Kishimoto Y, Takara E, Fukuyama T, Kinjo M, Irei M, Sakiyama H, Imoto K, Yazawa H, Seo T, Seiko A, Ito F, Shoji F, Saito R, Murata A, Minato K, Motegi K, Fujieda T, Abe T, Katagiri M, Suzuki M, Matsui K, Doi M, Terao A, Ishikawa Y, Tagami T, Doi H, Urata M, Okamoto N, Ide F, Sueta H, Sakiyama H, Onga N, Takaesu H, Uehara M, Horii F, Asano I, Yamaguchi H, Aoki K, Maruyama S, Ichii M, Takano M, Matsushima S, Natsukawa S, Akabane M, Konishi M, Okada K, Honda Y, Sakurai KYS, Tsuchiya N, Sugimura H, Tsubono Y, Kabuto M, Tominaga S, Iida M, Ajiki W, Ioka A, Sato S, Yasuda N, Nakamura K, Kono S, Suzuki K, Takashima Y, Yoshida M, Maruyama E, Yamaguchi M, Matsumura Y, Sasaki S, Watanabe S, Kadowaki T, Noda M, Mizoue T, Kawaguchi Y, Shimizu H. Dietary intake of saturated fatty acids and incident stroke and coronary heart disease in Japanese communities: the JPHC Study. Eur Heart J 2013; 34:1225-32. [DOI: 10.1093/eurheartj/eht043] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Abstract
Even though many neurochips have been developed and investigated, the best suitable way for implementation has not been known clearly. Our approach is to exploit stochastic logic for various operations required for neural functions. The advantage of stochastic logic is that complex operations can be implemented with a few ordinary logic gates. On the other hand, the operation speed is not so fast since stochastic logic requires certain accumulation time for averaging. However, a huge integration can be achieved and its reliability is high because all of operations are done on digital circuits. Furthermore, we propose a nonmonotonic neuron realized by stochastic logic, since the nonmonotonic property is efficient for the performance enhancement in association and learning. In this paper, we show the circuit design and measurement results of a neurochip comprising 50 neurons are shown. The advantages of nonmonotonic and stochastic properties are shown clearly.
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Affiliation(s)
- S Sato
- Lab. for Electron. Intelligent Syst., Tohoku Univ., Sendai, Japan
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12
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Takakuwa Y, Pack CG, An XL, Manno S, Ito E, Kinjo M. Fluorescence correlation spectroscopy analysis of the hydrophobic interactions of protein 4.1 with phosphatidyl serine liposomes. Biophys Chem 2007; 82:149-55. [PMID: 17030343 DOI: 10.1016/s0301-4622(99)00114-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/1999] [Accepted: 09/15/1999] [Indexed: 11/13/2022]
Abstract
Fluorescence correlation spectroscopy (FCS) was applied to examine the interactions between a protein and a membrane lipid. The protein 4.1-phosphatidyl serine (PS) interactions served as the model system to demonstrate the membrane lipid-protein interactions. This protein was labeled with rhodamine and its interactions with PS-liposomes were measured by FCS. The present results clearly demonstrated that a small protein molecule, protein 4.1, interacts specifically with a large particle, a PS-liposome. This interaction appears to be hydrophobic and not electrostatic, since the bound protein 4.1 did not dissociate in solution and was specifically released from PS-liposomes by treatment with phospholipase A(2) (PLA(2)). In the present study, using FCS we could demonstrate that the serine residue of PS is required for protein 4.1 to bind to PS-liposomes and that the bound protein 4.1 is closely associated with the fatty acid of the PS molecule in the liposomes.
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Affiliation(s)
- Y Takakuwa
- Department of Biochemistry, Tokyo Women's Medical University, School of Medicine, 8-1 Kawada-cho, Shinjyuku, 162-8666 Tokyo, Japan.
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13
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Abstract
The biophysical investigation of living cells is currently possible by single molecular detection methods such as fluorescence correlation spectroscopy (FCS). FCS is applied for measuring the dynamic mobility of target molecules in living cells; however, the conventional FCS systems still lack quantitative analysis for many regions of interests (ROI) in real time. To improve this situation, we have developed a novel multipoint FCS system (M-FCS) that can measure multipoint correlation functions in the cell simultaneously. To evaluate its performance, we measured correlation functions for rhodamine 6G (Rh6G) in homogeneous conditions and for green fluorescence protein (GFP) in HeLa cells. We conclude that M-FCS possesses reliable performance. As a pharmacological application, glucocorticoid receptor protein fused GFP (GR-GFP) was transfected in HeLa cells and FCS measurements were carried out in the cytoplasm and the nucleus simultaneously. The translocation of GR-GFP from the cytoplasm to the nucleus by ligand stimulation was observed with laser scanning microscopy (LSM) and M-FCS. Particularly in the nucleus, the slower diffusion of GR-GFP suggested molecular interactions after the translocation. These data imply that M-FCS can be applied for quantitative analysis of kinetic processes in living cells.
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Affiliation(s)
- Y Takahashi
- Laboratory of Supramolecular Biophysics, Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan
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14
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Gong JP, Kurokawa T, Narita T, Kagata G, Osada Y, Nishimura G, Kinjo M. Synthesis of hydrogels with extremely low surface friction. J Am Chem Soc 2001; 123:5582-3. [PMID: 11389644 DOI: 10.1021/ja003794q] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Nomura Y, Tanaka H, Poellinger L, Higashino F, Kinjo M. Monitoring of in vitro and in vivo translation of green fluorescent protein and its fusion proteins by fluorescence correlation spectroscopy. Cytometry 2001; 44:1-6. [PMID: 11309802] [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: 02/19/2023]
Abstract
BACKGROUND Because the process of protein translation is an event of sparse molecules, the measurement requires high sensitivity. One of the candidates for studying the molecules is fluorescence correlation spectroscopy (FCS), which gleans quantitative information from fluctuating fluorescence signals in a diluted solution. METHODS Using FCS, the translation products of expression plasmid for green fluorescent protein (GFP) and its fusion proteins were measured in vitro and in vivo. RESULTS In in vitro translation, the number of products increased linearly for 90 min upon concentration of the plasmid. The autocorrelation function for GFP was fitted with a one-component model with a diffusion time of 0.18 ms, which was identical to the value expected from the molecular weight. In the cases of GFP- tagged hypoxia-inducible factor-1 alpha and glucocorticoid receptor, each fitting result was significantly improved with a two-component model. The slow component with a diffusion time of 6 ms appeared to be related to the ribosome or polysome. In response to the addition of dexamethasone, the nuclear translocation from cytosol clearly induced the decrease in number of molecules in the focal point. CONCLUSIONS FCS permits monitoring of the number of molecules translated in vitro and in vivo, the translation rate, and the molecular weight.
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Affiliation(s)
- Y Nomura
- Laboratory of Supramolecular Biophysics, Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan.
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16
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Murata A, Tambo M, Yoshimatsu T, Ota M, Kinjo M, Noda H, Watanabe K, Kato M, Miyata A, Miura I, Okegawa T, Yoneda T, Yoshii M, Sayama T, Nutahara K, Higashihara E. [Comparisons of factors affecting voiding disorders between patients with benign prostate hyperplasia and volunteers]. Nihon Hinyokika Gakkai Zasshi 2001; 92:451-6. [PMID: 11398319 DOI: 10.5980/jpnjurol1989.92.451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 04/16/2023]
Abstract
PURPOSE The prostate size and motivation to visit clinics were investigated in patients with prostate hyperplasia. OBJECTS AND METHODS One hundred ninety-five patients who had urinary symptoms and visited our outpatient clinic between September 1994 and October 1999 and 268 age-matched volunteers in Mitaka City who underwent a medical examination of the prostate in June 1997 were compared. International Prostate Symptom Score (IPSS), Quality Of Life Score (QOL score), residual urine volume, prostate volume and urinary flow rate were measured. RESULTS The prostate volume of the volunteers was 20-25 cm3 irrespective of the age. The prostate size of the outpatients was larger than that of the volunteers for every age group. IPSS and QOL score were significantly higher in the outpatients than in the volunteers. Diurnal urinary frequency and sense of residual urine contributed to the discrimination index of the two groups more significantly than the other scores. There was a significant correlation between prostate volume and residual urine volume. The score of weak urinary steam was inversely and significantly correlated with peak urinary flow rate. CONCLUSIONS There was no age-related enlargement of the prostate gland. The prostate gland was significantly larger in the patients than in the volunteers even in those in their fifties. Urinary frequency and sense of residual urine are important factors for men to seek and receive medical care.
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Affiliation(s)
- A Murata
- Department of Urology, Kyorin University, School of Medicine
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17
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Yoshida N, Kinjo M, Tamura M. Microenvironment of endosomal aqueous phase investigated by the mobility of microparticles using fluorescence correlation spectroscopy. Biochem Biophys Res Commun 2001; 280:312-8. [PMID: 11162516 DOI: 10.1006/bbrc.2000.4115] [Citation(s) in RCA: 36] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Temporal observation of the dynamic behavior of molecules in cells gives information about the physiological environment at the region of interest. Here we report the direct measurement of the mobility of rhodamine-labeled microparticles (14 and 35 nm in diameter) ingested in endosomes of cultured bovine aortic endothelial cells using fluorescence correlation spectroscopy (FCS). The fluctuation of fluorescent signals from microparticles were measured by FCS. Obtained autocorrelation functions (FAFs) were analyzed by the 2-D multicomponent model according to an evaluation procedure we newly developed. It was found that microparticles moved freely in endosomes with average diffusion coefficients of 4.3 x 10(-8) and 2.7 x 10(-8) cm2 s(-1) for 14 and 35 nm, which were 45% slower than in water. This result implies that the endosomal aqueous phase is homogeneous with the viscosity about 2.2 times of water. Our study also proposes the new use of FCS for investigation of the internal space of organelles.
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Affiliation(s)
- N Yoshida
- Laboratory of Supramolecular Biophysics, Research Institute for Electronic Science, Hokkaido University, N12W6, Kita-ku, Sapporo 060-0812, Japan.
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Oba K, Matsuyama H, Yoshihiro S, Kishi F, Takahashi M, Tsukamoto M, Kinjo M, Sagiyama K, Naito K. Two putative tumor suppressor genes on chromosome arm 8p may play different roles in prostate cancer. Cancer Genet Cytogenet 2001; 124:20-6. [PMID: 11165318 DOI: 10.1016/s0165-4608(00)00248-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although loss of heterozygosity (LOH) on the short arm of chromosome 8 has been frequently observed in human prostate cancer, the relationship between LOH and clinical background is poorly understood. Fluorescence in situ hybridization (FISH) was employed to evaluate the chromosomal deletion on 8p in 42 prostate cancers using a centromeric probe for chromosome 8, in combination with 4 cosmid probes spanning 8p12 to 8p22. Deletions for at least one locus on the 8p were observed in 29 (69.0%) tumors. The most frequently deleted regions were 8p22 (54.8%) and 8p21.3 (52.4%), in almost the same frequency. The second most frequently deleted region was 8p21.1-p21.2 (38.1%). Deletions of 8p22 and 8p21.3 significantly correlated with tumor grade (P=0.0034, Fisher's exact probability test). A significantly higher frequency of the deletion on 8p21.1-p21.2 was observed in advanced prostate cancer (beyond capsular penetration or positive nodal metastases) than in localized prostate cancer (P=0.0033). In particular, deletion of 8p21.1-p21.2 was more frequently observed in the cases with lymph node metastases than without them (P=0.0029). No clinicopathological parameters had significant relation to deletions on 8p12. These results suggest that deletions on 8p22-p21.3 play an important role in tumor differentiation, while an 8p21.1-p21.2 deletion plays a role in the progression of prostate cancer.
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Affiliation(s)
- K Oba
- Department of Urology, Yamaguchi University School of Medicine, 1-1 Minami-Kogushi, Ube, Japan
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Abstract
Slow axonal transport depends on an active mechanism that conveys cytosolic proteins. To investigate its molecular mechanism, we now constructed an in vitro experimental system for observation of tubulin transport, using squid giant axons. After injecting fluorescence-labeled tubulin into the axons, we monitored the movement of fluorescence by confocal laser scanning microscopy and fluorescence correlation spectroscopy. Here, from the pharmacological experiments and the functional blocking of kinesin motor protein by anti-kinesin antibody, we show that the directional movement of fluorescent profile was dependent on kinesin motor function. The fluorescent correlation function and estimated translational diffusion time revealed that tubulin molecule was transported in a unique form of large transporting complex distinct from those of stable polymers or other cytosolic protein.
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Affiliation(s)
- S Terada
- Department of Cell Biology and Anatomy, The University of Tokyo Graduate School of Medicine, Japan
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20
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Okegawa T, Kinjo M, Watanabe K, Noda H, Kato M, Miyata A, Murata A, Yoshii M, Nutahara K, Higashihara E. The significance of the free-to-complexed prostate-specific antigen (PSA) ratio in prostate cancer detection in patients with a PSA level of 4.1-10.0 ng/mL. BJU Int 2000; 85:708-14. [PMID: 10759671 DOI: 10.1046/j.1464-410x.2000.00602.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To compare the ratio of free prostate specific antigen (fPSA), total PSA (tPSA) and complexed PSA (cPSA, measured using a novel immunoassay) with other variables used to detect prostate cancer in patients with intermediate serum PSA levels of 4.1-10.0 ng/mL. PATIENTS AND METHODS From July 1997 to August 1998, 140 consecutive patients were assessed; all had intermediate serum PSA levels and/or abnormal findings on a digital rectal examination. All patients underwent transrectal ultrasonography (TRUS)-guided biopsy, and the prostate and transition zone volumes were determined by TRUS. Free and tPSA were measured using the Tandem-R assay (Hybritech Corp., San Diego, CA). PSA complexed with alpha1-antichymotrypsin (cPSA) was measured using an appropriate assay. The ability of cPSA, free-to-total PSA ratio (f/tPSA), free-to-complexed PSA ratio (f/cPSA), tPSA density of the whole prostate (PSAD), of the transition zone (tPSATZ), and cPSA density of the whole prostate (cPSAD) and of the transition zone (cPSATZ) to improve the power of PSA in detecting prostate cancer was evaluated using receiver operating characteristic (ROC) curves. Results Of the 140 patients, 126 had histologically confirmed benign disease and 14 had prostate cancer. The cPSA alone had better specificity for detecting prostate cancer than had tPSA alone but the difference was not significant. The area under the ROC curve for f/cPSA was larger than those for all other variables. With a 93% sensitivity for detecting prostate cancer, a f/cPSA threshold of 25% would result in fewer unnecessary biopsies (40% f/cPSA specificity) than with all other PSA variables. The difference in the resolution was significant between f/cPSA and tPSA, cPSA, tPSAD and tPSATZ, but not with f/tPSA, cPSAD or cPSATZ. In patients with a prostate volume of < 30 mL, the cPSATZ showed better specificity for prostate cancer than tPSA alone. CONCLUSION Measuring the level of cPSA and its derivatives may provide better differentiation of prostate cancer and benign disease than tPSA alone in patients with a tPSA level of 4.1-10.0 ng/mL.
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Affiliation(s)
- T Okegawa
- Department of Urology, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
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21
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Sakashita N, Ando Y, Obayashi K, Terazaki H, Yamashita T, Takei M, Kinjo M, Takahashi K. Familial amyloidotic polyneuropathy (ATTR Ser50Ile): the first autopsy case report. Virchows Arch 2000; 436:345-50. [PMID: 10834537 DOI: 10.1007/s004280050457] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We report an autopsy case of a pedigree of familial amyloidotic polyneuropathy (FAP) with a mutation of isoleucine-50 transthyretin (ATTR Ser50Ile). A 47-year-old man started developing severe diarrhea and weight loss at age 41 years, followed by urinary incontinence, autonomic-nervous-system abnormalities and serious heart failure; the diagnosis of FAP (ATTR Ser50Ile) was made on the basis of genetic, histochemical and immunohistochemical analysis. Six years after the initial symptoms, he died of septic shock. Autopsy revealed suppurative peritonitis, perforation of the sigmoid colon and marked systemic amyloid deposition. The total amount of amyloid deposited in the heart was greatly increased and was much lower in the thyroid gland and kidneys compared with amyloid deposits in ordinary FAP (ATTR Val30Met). Amyloid deposition in peripheral vessel walls was prominent, particularly in lymphatics and veins. His elder sister, 54 years old, started to develop orthostatic hypotension at age 49 years, followed by dysesthesia, diarrhea and severe congestive heart failure. Endomyocardial biopsy revealed severe TTR-amyloid deposition; ultrastructural examination demonstrated that amyloid fibrils were deposited disproportionately and extended radially around microvessels.
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Affiliation(s)
- N Sakashita
- Second Department of Pathology, Kumamoto University School of Medicine, Japan
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22
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Abstract
Hypoxic induction of c-fos was studied in rat brains as a function of the cerebral oxygenation state using near-infrared spectroscopy by which the hemoglobin oxygenation state and redox state of mitochondrial cytochrome oxidase could be monitored noninvasively. Following reoxygenation after hypoxia, the expression of c-fos and MAP2 mRNAs was followed by reverse transcription-coupled PCR. The expression of MAP2 remained unchanged throughout all the conditions from 21 to 8% FiO2. Under mildly hypoxia conditions, c-fos mRNA was not induced. Hemoglobin was partially deoxygenated but cytochrome oxidase remained fully oxidized. Severe hypoxia, where cytochrome oxidase was reduced, caused a significant induction of c-fos mRNA At this stage, the oxygen concentration in cerebral tissue fell to < 10(-7) M. These data suggest that the decline in oxidative phosphorylation might be a trigger for the induction of c-fos mRNA.
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Affiliation(s)
- Y Nomura
- Laboratory of Supramolecular Biophysics, Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan
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23
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Pack CG, Aoki K, Taguchi H, Yoshida M, Kinjo M, Tamura M. Effect of electrostatic interactions on the binding of charged substrate to GroEL studied by highly sensitive fluorescence correlation spectroscopy. Biochem Biophys Res Commun 2000; 267:300-4. [PMID: 10623614 DOI: 10.1006/bbrc.1999.1864] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [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: 11/22/2022]
Abstract
The binding processes of GroEL with apo cytochrome c (apo-cyt c) and disulfide-reduced apo alpha-lactalbumin (rLA) in homogeneous solution at low concentration were analyzed by fluorescence correlation spectroscopy (FCS) with extremely high sensitivity. Although apo-cyt c, a positively charged substrate, was tightly bound to GroEL in both the absence and the presence of 200 mM KCl, the strength of the binding was changed with varying salt concentration. Results from experiments when two different salts (KCl or MgCl(2)) were titrated into a sample solution containing GroEL and apo-cyt c clearly showed that the binding strength decreased with increasing salt concentration. On the other hand, the binding affinity of GroEL for rLA, a negatively charged substrate, increased by adding of 200 mM KCl. These results indicate that electrostatic interactions substantially contribute to the binding interactions by manipulating the binding affinity of charged substrates.
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Affiliation(s)
- C G Pack
- Research Institute for Electronic Science, Hokkaido University, N12W6, Kita-ku, Sapporo, 060-0812, Japan.
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24
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Ikehira H, Kinjo M, Yamamoto Y, Makino H, Furuichi Y, Nakamura H, Aoki T. Hot spots observed on pulmonary perfusion imaging: a case report. J Nucl Med Technol 1999; 27:301-2. [PMID: 10646551] [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: 02/15/2023] Open
Abstract
A case of hot spots observed on perfusion lung images is presented. This artifact is well known, however, it is rarely seen in our experience. Although this artifact can occur if a faulty injection technique is used, the artifact also may be caused by embolization of the MAA in the upper extremity venous blood after injection. This cause of the artifact is beyond the control of the nuclear medicine professional.
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Affiliation(s)
- H Ikehira
- Department of Radiology, Kawatetsu Chiba Hospital, Japan
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25
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Kinjo M. [Single molecule detection using fluorescence correlation spectroscopy]. Tanpakushitsu Kakusan Koso 1999; 44:1431-8. [PMID: 10412293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- M Kinjo
- Laboratory of Supramolecular Biophysics, Hokkaido University, Sapporo, Japan.
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26
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Pack CG, Nishimura G, Tamura M, Aoki K, Taguchi H, Yoshida M, Kinjo M. Analysis of interaction between chaperonin GroEL and its substrate using fluorescence correlation spectroscopy. Cytometry 1999; 36:247-53. [PMID: 10404975 DOI: 10.1002/(sici)1097-0320(19990701)36:3<247::aid-cyto15>3.3.co;2-r] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Fluorescence correlation spectroscopy (FCS) provides information about translational diffusion properties of fluorescent molecules in tiny detection volume and allows the analysis of binding processes of biomolecules in homogeneous solution. In this study, FCS was used to measure equilibrium binding constants of disulfide-reduced apo-alpha-lactalbumin (rLA), denatured pepsin, and apo-cytochrome c (apo-cyt c) bound by chaperonin GroEL at different salt concentrations. The results indicate that apo-cyt-c has a much stronger affinity to GroEL than denatured pepsin and rLA have. Titration experiments of GroEL to each substrate with various concentrations of four kinds of salts (K+, Na+, Ca2+, and Mg2+) show that the binding constant of denatured pepsin and rLA to GroEL depends on the salt concentration. The dependence of denatured pepsin binding to GroEL on salt concentration is much stronger than that of rLA. However, the interaction of positively charged apo-cyt c with GroEL is not affected by the salt concentration. Furthermore, the divalent cation promotes the binding of GroEL to denatured pepsin and rLA more strongly than does the monovalent cation.
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Affiliation(s)
- C G Pack
- Laboratory of Supramolecular Biophysics, Research Institute for Electronic Science, Hokkaido University, Sapporo, Japan
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27
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Ikehira H, Furuichi Y, Kinjo M, Yamamoto Y, Aoki T. Multiple extra-bone accumulations of technetium-99m-HMDP. J Nucl Med Technol 1999; 27:41-2. [PMID: 10322574] [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: 02/12/2023] Open
Abstract
Bone scintigraphy was performed on a woman 2 y and 10 mo after surgery for rectal cancer. Intense extra-bone accumulations of 99mTc-HMDP were visible in an aortic atherosclerosis lesion and in a metastatic liver tumor. Uptake in the metastatic lesion was confirmed by x-ray CT. Uptake in the aortic lesion was shown as typical calcification by x-ray CT.
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Affiliation(s)
- H Ikehira
- Department of Radiology, Kawatetsu Chiba Hospital, Japan
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28
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Abstract
Costochondral inflammation is a rare clinical finding. A case is presented, in which acute chostochondritis is demonstrated by gallium scinitigraphy.
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Affiliation(s)
- H Ikehira
- Department of Radiology, Chiba University School of Medicine, Japan
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29
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Abstract
The yield of the double-stranded DNA product (500 bp) of asymmetric PCR with a rhodamine-labeled primer (Rho-primer) was determined in a homogeneous solution using fluorescence correlation spectroscopy (FCS). FCS provides the average number of molecules in a focused volume and the diffusion constant that relates the molecular weight. Since FCS measures the fluctuation of fluorescence intensity in a very small sample volume, the reaction mixture was directly placed on the FCS optical field without any purification procedure after amplification. The result of changing the initial number of templates suggested that elongation of the Rho-primer could be detected by FCS in a PCR mixture containing a single copy of the target gene in the initial condition. Possible scientific applications and perspectives of the proposed approach are discussed.
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Affiliation(s)
- M Kinjo
- Laboratory of Biophysics, Hokkaido University, Sapporo, Japan
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30
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Abstract
We show that fluorescence correlation spectroscopy (FCS) can be used as a reliable, simple, and fast tool for detecting products of the polymerase chain reaction (PCR). By use of autocorrelation experiments, it is demonstrated that fluorescent 217-bp DNA fragments can be detected at very low initial ss M13mp18(+) DNA and tetramethylrhodamine-4-dUTP concentrations and that these polymers are cleaved by the chosen restriction enzymes. A FCS calibration curve is presented, where the translational diffusion times of different size DNA fragments are plotted versus the number of base pairs they contain. At zero and very low template concentrations a large "background" species emerges, which is a reflection of the experimental conditions chosen and the extremely high sensitivity of FCS. The relative amount of nonspecific product formation is less than 1%. The ease by which a FCS measurement can be performed (a few minutes at most) also enables the technique to be used as an effective screening method.
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Affiliation(s)
- S Björling
- Department of Medical Biophysics, MBB, Karolinska Institute, Stockholm, Sweden
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31
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Abstract
The cleavage of fluorescence-labeled M13DNA (7250 bp) using HaeIII, HgaI, BsmAI, and BspMI was analyzed by fluorescence correlation spectroscopy (FCS) in a small volume (1.5 x 10(-15) liters). The digestion process can be monitored by the decrease in amplitude of the fluorescence correlation function while the original DNA molecule is divided into several fragments by the enzymes. To analyze this reaction by FCS, we derived a practical equation for estimating the number of molecules in the FCS measurements. Under standard enzymatic conditions, HaeIII and BsmAI digested fluorescence-labeled DNA to completion in the range of 8 h, whereas HgaI and BspMI digested the DNA after 40 h. The comparison of recognition sequences suggested that some tagged nucleotides could be inserted between the recognition site and the cleavage site of the slow enzyme group. The decrease in amplitude in the fluorescence correlation function quantitatively monitors the hydrolysis of DNA during the digestion process.
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Affiliation(s)
- M Kinjo
- Research Institute for Electronic Science, Hokkaido University, Sapporo, 060, Japan.
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32
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Abstract
The capacity for intercellular communication (IC) via gap junctions is found in normal pancreatic acinar cells. The major role of IC is considered to be the maintenance of tissue homeostasis and the regulation of signal transmissions. Up to now, the participation of IC via gap junctions in acute pancreatitis has not been reported. We investigated the role of IC in cerulein (Cn)-induced acute pancreatitis in rats using irsogladine, an enhancer of IC via gap junction. Acute edematous pancreatitis was induced in rats by two intraperitoneal injections of 40 micrograms/kg Cn. Rats received various doses (25, 50, or 100 mg/kg body weight) of irsogladine orally, 15 and 2 h before the first Cn injection. The normal control group received only vehicle. The severity of pancreatitis was evaluated enzymatically and histologically 5 h after the first Cn injection. In Cn-induced acute pancreatitis, irsogladine significantly lowered the serum amylase level, the pancreatic wet weight, and the pancreatic amylase and DNA contents, in a dose-dependent manner. Particularly, the amylase content improved to the level of the normal controls. Histologically, the severity of pancreatitis was reduced significantly by treatment with irsogladine and no discernible vacuolization was seen in the group with 100 mg/kg irsogladine treatment. By immunofluorostaining pancreata with anti-connexin 32 (Cx32; a gap junction protein) antibody, we found that pancreatic acini were diffusely positive for Cx32 in the control group, but the number of Cx32-positive grains decreased markedly, to 19%, in the pancreatitis group. With 100 mg/kg irsogladine treatment, the number of Cx32 grains recovered to 70% of the normal control value. These findings indicate that IC via gap junction is disturbed in Cn-induced pancreatitis, which may result in the breakdown of tissue homeostasis and the progression of acute pancreatitis.
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Affiliation(s)
- T Ito
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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33
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Yokoyama M, Miyazaki M, Koyama Y, Kinjo M, Ohta Y, Hirakawa M. [The spread of contrast medium in the epidural space and the analgesic area in epidural anesthesia in elderly patients]. Masui 1996; 45:1067-73. [PMID: 8905941] [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: 02/03/2023]
Abstract
We evaluated the relationship between the spread of contrast medium in epidural space and the analgesia area in epidural anesthesia in elderly patients. The spread of contrast medium was examined radiographically after the injection of iotrolan 5 ml through the epidural catheter and the analgesia area was examined by pin prick following the epidural injection of the same volume of 1% lidocaine. In lumbar group (group L) (n = 10), the radiographic spread was 10.4 (4-17) segments (mean, minimum-maximum) and the analgesic area was 8.5 (4-15) dermatomes. In cervical or thoracic group (group C/T) (n = 10), the radiographic spread was 12.4 (8-17) segments and the analgesic area was 10.4 (6-15) dermatomes. The dose of local anesthetics required to get analgesia per. one dermatome was 0.7 (0.3-1.3) ml in group L and 0.5 (0.3-0.8) ml in group C/T. The spread of contrast medium correlated well with the analgesic area in both groups (group L:Y = 0.79X + 0.31, r = 0.92, group C/ T:Y = 0.80X + 0.52, r = 0.79). The mean dose of local anesthetics required for analgesia was smaller than that of previous reports although individual variations were large. We conclude that the spread of contrast medium is useful for predicting the spread of epidural block.
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Affiliation(s)
- M Yokoyama
- Department of Anesthesiology and Resuscitology, Okayama University Medical School
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34
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Yonesaka S, Takahashi T, Tomimoto K, Kinjo M, Sunagawa Y, Sato S, Nakada T, Matubara T, Oura H, Koda M, Furukawa H. Clinical and histopathological studies in children with supraventricular tachycardia. Jpn Circ J 1996; 60:560-6. [PMID: 8889658 DOI: 10.1253/jcj.60.560] [Citation(s) in RCA: 3] [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] [Indexed: 02/02/2023]
Abstract
To determine whether myocardial changes in patients with supraventricular tachycardia (SVT) are primary or secondary to persistent tachycardia, 11 patients with SVT were studied. These patients were divided into 2 groups with respect to the type of SVT. Group I consisted of 5 patients with incessant SVT and one with multifocal atrial tachycardia, while group II consisted of 4 patients with paroxysmal supraventricular tachycardia and one with short-run supraventricular premature contraction. All of the patients underwent electrophysiological study and endomyocardial biopsy from the right ventricle following routine cardiac catheterization. In group II, there were no significant abnormalities in the clinical and hemodynamic parameters. In group I, 3 patients had clinical features of dilated cardiomyopathy including abnormal ECG, chest X-ray and hypokinesis on left ventriculography. Induction and termination of SVT were possible in 2 patients in group I and in 4 of the 5 patients in group II. The only significant histologic difference between group I and group II was fibrosis. A high incidence of histopathological abnormalities, such as hypertrophy, degeneration, interstitial fibrosis and disarray was observed in both groups. The incidence of significant pathology was higher in group I than in group II. Almost all of the patients were given antiarrhythmic drugs. One patient underwent a successful surgical procedure and normal cardiac function returned after resection of the foci of the right atrium. Our present results suggest that patients with SVT who have incessant or recurrent SVT should undergo not only intracardiac electrophysiologic study but also endomyocardial biopsy for the evaluation of myocardial damage, since SVT might be the initial sign of cardiomyopathy.
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Affiliation(s)
- S Yonesaka
- Department of Pediatrics, Hirosaki University School of Medicine, Japan
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35
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Michinaga S, Ariyoshi A, Kinjo M, Sagiyama K. [Flow cytometry analysis of the DNA content of the prostate cancer--study on the tumor heterogeneity in prostate cancer]. Nihon Hinyokika Gakkai Zasshi 1996; 87:937-941. [PMID: 8753013 DOI: 10.5980/jpnjurol1989.87.937] [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: 05/22/2023]
Abstract
PURPOSE Clinical significance of DNA ploidy pattern and its DNA heterogeneity is examined in prostate cancer. METHODS Fresh needle biopsy specimens were analyzed with flow cytometry and were compared with histopathological findings in 42 patients. RESULTS Seven patients had stage B (1 case of B1, 6 cases of B2), 14 had stage C and 21 had stage D disease respectively. Histopathologically, 18 of the cases were well, 12 were moderately and 12 were poorly differentiated adenocarcinoma. Diploid was observed in 20, aneuploid in 22. Though 22 cases showed no DNA heterogeneity, 14 had type A heterogeneity with aneuploid in association with diploid pattern, and 6 cases had type B heterogeneity in which multiple aneuploid patterns with different D.I. values were observed. The heterogeneity was observed in 28% of well, 58% of moderately and 67% of poorly differentiated adenocarcinoma, respectively, and also in 14% of stage B, 50% of stage C and 57% of stage D patients, respectively. CONCLUSION We conclude that DNA heterogeneity in prostate cancer is more frequently seen in poorer differentiated ones on histologic grade and in more advanced ones on clinical stage.
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Affiliation(s)
- S Michinaga
- Department of Urology, Fukuoka University, Chikushi Hospital
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36
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Katayama K, Nishimura G, Kinjo M, Tamura M. Absorbance measurements in turbid media by the photon correlation method. Appl Opt 1995; 34:7419-7427. [PMID: 21060616 DOI: 10.1364/ao.34.007419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Optical absorption in highly turbid media was quantified by the time shift of the electric field autocorrelation function of diffused photons. The intensity autocorrelation function was analyzed by the third-order cumulant expansion and a linear relationship between the time shift and the absorber concentration was observed. The slope of the fitted line gave the molecular extinction coefficient of the absorber. The absorption spectra were also obtained from the time shift. Applicability to dual-wavelength absorption measurement is also discussed. We demonstrate for the first time, as far as we know, the feasibility of absorbance quantification in turbid media by the photon correlation method.
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Abstract
To establish a new experimental model of chronic pancreatitis (CP) with diabetes, we investigated pancreatic endocrine function, blood flow, and histopathology in CP induced by repetition of cerulein injection plus water immersion stress in rats. CP rats were treated with water immersion stress for 5 hr and two intraperitoneal injections of 20 micrograms/kg body weight of cerulein once a week for 16 weeks. In the CP group, pancreatic contents of protein, amylase, elastase, and lipase significantly decreased to 64, 38, 23, and 68% of the control group, respectively. In oral glucose tolerance test (glucose 2 g/kg body wt), blood glucose level in the CP group was 212.1 +/- 97.8 mg/dl (mean +/- SD) at 30 min and was significantly higher than the control group (126.3 +/- 15.4 mg/dl)(P < 0.05). Two of seven rats in the CP group showed an obvious diabetic insulin in the CP group was 640.1 +/- 148.7 pM, significantly lower than in the control group (1133.4 +/- 242.0 pM)(P < 0.001). However, insulin content in the pancreas was 12.37 nmol/pancreas). In CP rats, winding and dilatation of surface blood vessels and gland atrophy were evident. Marked fibrosis, fatty changes, and destruction of lobular architecture were also demonstrated microscopically, although the structure of each pancreatic islet was preserved and each islet was fully stained with anti-insulin antibody. In the CP group, pancreatic blood flow by the hydrogen gas-clearance method was 197.6 +/- 33.0 ml/min/100 g, which was significantly less than the control group (276.2 +/- 19.1 ml/min/100 g) (P < 0.001). Thus, we conclude that the CP model induced by cerulein plus stress is a new CP model with diabetes in rats, in which the glucose tolerance was impaired without loss of insulin reserve.
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Affiliation(s)
- M Goto
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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38
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Abstract
The hybridization of fluorescently tagged 18mer deoxyribonucleotides with complementary DNA templates was analysed by fluorescence correlation spectroscopy (FCS) in a droplet under an epi-illuminated fluorescence microscope at the level of single molecules. The interaction can be monitored by the change in the translational diffusion time of the smaller (18mer) primer when binding to the bigger (7.5 kb) DNA containing the complementary sequence. The hybridization process in the presence of template M13mp18 ssDNA was monitored in a small volume (2 x 10(-16)I) at various temperatures. The Arrhenius plot of the association rate constant shows that the activation energy was 38.8 kcal/mol, but the hybridization process may involve several components. The titration experiment suggested that approximately 2 primers can be associated with one template DNA at 40 degrees C. Results of a simple homology search for the sequences complementary to the primer indicate the existence of additional sites of lower specificity.
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Affiliation(s)
- M Kinjo
- Department of Medical Biophysics, Karolinska Institute, Stockholm, Sweden
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39
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Tanaka M, Fujishima H, Chijiiwa Y, Nawata H, Eguchi T, Kinjo M. Endoscopic ultrasonographic findings in rectal leiomyoma. J Gastroenterol Hepatol 1995; 10:103-5. [PMID: 7620097 DOI: 10.1111/j.1440-1746.1995.tb01057.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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A 35 year old man visiting a hospital for his annual check-up in August 1992 was found to have a large rectal tumour on digital examination. Colonoscopy revealed a bulging lesion with normal mucosa. Endoscopic biopsy showed only normal tissue. Endoscopic ultrasonography demonstrated a large hypo-echoic submucosal tumour in the fourth layer (muscularis propria) of the rectal wall. Based on this endoscopic ultrasonographic finding, we diagnosed the tumour as leiomyoma pre-operatively. The tumour was excised by a trans-sacral local excision. The histological diagnosis of the resected specimen was cellular leiomyoma.
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Affiliation(s)
- M Tanaka
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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40
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Makita Y, Iwamoto T, Sagiyama K, Nagaoka A, Kinjo M, Noguchi M, Aramaki K, Okuda S, Fujishima M. Two cases of urogenital malignancies in male patients undergoing maintenance haemodialysis. Int Urol Nephrol 1994; 26:713-8. [PMID: 7759209 DOI: 10.1007/bf02767729] [Citation(s) in RCA: 5] [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] [Indexed: 01/27/2023]
Abstract
We report two cases of urogenital malignancies, prostatic cancer in a 72-year-old man and urinary bladder carcinoma in a 50-year-old man, that developed during maintenance haemodialysis. The former patient responded to hormonal therapy with diethylstilboestrol and is still alive on maintenance haemodialysis, but the latter patient did not respond to treatment, being past cure in the far advanced stage. There are few clinical symptoms suggesting the existence of urogenital malignancies in dialysis patients and screening methods such as urine cytology or roentgenology must be restricted because of extremely reduced urine volume. However, the high incidence of urogenital malignancies in such patients is well recognized. Screening examinations with ultrasonography and/or CT scan following digital rectal examination or testing for serum prostate-specific antigen should be performed at least every 6 months.
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Affiliation(s)
- Y Makita
- Second Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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41
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Keatisuwan W, Kinjo M, Koyama T. Time course of changes in phospholipid in cardiac mitochondria from rats recovering from prolonged swimming. Jpn Heart J 1994; 35:345-51. [PMID: 7933550 DOI: 10.1536/ihj.35.345] [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: 01/27/2023]
Abstract
The time course of the recovery of cardiac mitochondrial phospholipids was investigated in rats subjected to a 3 hour loaded swim. The 3 hour swim caused a 50% reduction in mitochondrial phospholipids compared with the level in sedentary controls. During the first 12 hours of the recovery period, phospholipids tended to increase but fell again before reaching control values by 120 hours after the swim ended. Phospholipid recovery in microsomes was completed in 12 hours. Total mRNA in cardiac tissue decreased by about 15% in rats subjected to a 3 hour loaded swim but recovered to control levels in the first 12 hours of the sedentary recovery period. Thus, fluctuations in cardiac mitochondrial phospholipids do not parallel the changes in total mRNA in cardiac tissue.
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Affiliation(s)
- W Keatisuwan
- Laboratory of Molecular Physiology, Hokkaido University, Sapporo, Japan
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42
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Abstract
We studied morphologic changes in a rat model of acute hemorrhagic pancreatitis in order to investigate the mechanism by which water immersion stress injures the pancreas. Acute hemorrhagic pancreatitis was induced by two intraperitoneal injections of 40 micrograms/kg body weight of caerulein at 1-h intervals under water immersion stress for 5 h at 23 degrees C. Light microscopy showed interstitial edema with inflammatory cell infiltration, degeneration and necrosis of acinar cells, and bleeding. Electron microscopy showed large autophagic vacuoles, decreased zymogen granules, and dilated rough endoplasmic reticulum in acinar cells. Basolateral exocytosis of large vacuoles and phagocytosis of the degenerated acinar cells were observed. In addition, microvascular damage, including the destruction of the capillary endothelial cells, capillary thrombosis, and the extravasation of blood cells, was seen. In contrast, in a pancreatitis model induced by caerulein injection alone, there was no bleeding, no remarkable vascular change, and no thrombosis. Degeneration and necrosis of acinar cells were less severe. In the pancreas under stress alone, microvascular damage and degeneration of acinar cells were observed. These findings demonstrate that stress injures the pancreas and worsens the pancreatitis by causing microcirculatory disturbances, such as vascular damage, thrombosis, increased vascular permeability, and bleeding. These results suggest that chemical mediators, such as free radicals and platelet-activating factor (PAF), which are produced by vascular damage and thrombosis, may accelerate the activation of zymogen proteases in acinar cells in caerulein-induced pancreatitis, leading to hemorrhagic pancreatitis.
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Affiliation(s)
- S Takano
- Department of Internal Medicine, Faculty of Medicine, Kyushu University, Japan
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43
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Abstract
Our purpose was to investigate enzymatically and morphologically the acute effect of the immunosuppressive agent cyclosporin A (CsA) on the exocrine pancreas of rats. The intravenous injection of CsA 10 and 20 mg/kg body weight (BW) increased the content of pancreatic amylase and protein and decreased the content of pancreatic DNA. Histologically, we observed intraacinar vacuolization and individual cell necrosis. Under stimulation of the pancreas by two intraperitoneal injections of caerulein 5 micrograms/kg BW at 1-h intervals (which did not induce any evident change in the pancreas), CsA induced a significant increase in serum amylase and in pancreatic wet weight in a dose-dependent manner. CsA at doses of 10 and 20 mg/kg BW produced a significant increase in the content of pancreatic amylase and protein. Macroscopically, we observed marked pancreatic edema, venous dilatation, and patchy hemorrhage. Histologically, there were significant differences in the severity of intra-acinar vacuolization, interstitial edema, neutrophil infiltration, individual cell necrosis, and hemorrhage, severity of which was dose dependent. Pancreatic ductal erosion was particularly marked following treatment with CsA 20 mg/kg BW. These findings indicate that CsA accelerates abnormal pancreatic enzyme secretion and suggest that the therapeutically recommended doses of CsA can induce acute pancreatitis under stimulation of the pancreas.
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Affiliation(s)
- T Ito
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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44
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Abstract
BACKGROUND The rapid respiratory frequency of children may lead to patient-ventilator asynchrony and increase the work of breathing during mechanical ventilation, and the use of a small endotracheal tube and a demand valve can further increase this work of breathing. Although pressure support ventilation (PSV) is well known to reduce the work of breathing in adults, there are no reports regarding clinical studies of PSV in children. Therefore, the effect of PSV on breathing patterns and the work of breathing in children was studied. METHODS Six children (3-5 yr of age) were studied in the immediate postoperative period. Three levels of PSV, 0, 5, and 10 cmH2O, were employed. Airway pressure, flow, tidal volume, minute ventilation, and respiratory frequency were measured. To assess the work of breathing, the negative deflection of esophageal pressure (delta Pes) caused by inspiratory effort was measured. The inspiratory work of breathing was also estimated directly by measuring the esophageal pressure-volume loop using the Campbell technique. RESULTS Although minute ventilation did not change with PSV, tidal volume increased and respiratory frequency decreased with increasing levels of PSV. The delta Pes decreased markedly from 8.9 cmH2O with PSV of 0 cmH2O to 5.7 cmH2O with PSV of 5 cmH2O and 2.7 cmH2O with PSV of 10 cmH2O. The mechanical work of breathing also decreased from 0.743 Joules/l with PSV of 0 cmH2O to 0.463 Joules/l with PSV of 5 cmH2O and 0.196 Joules/l with PSV of 10 cmH2O. CONCLUSIONS It was concluded that PSV can effectively augment spontaneous breathing and reduce the work of breathing in children.
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Affiliation(s)
- H Tokioka
- Department of Anesthesiology and Resuscitology, Okayama University Medical School, Japan
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45
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Uehara M, Tamura N, Kinjo M, Shinzato K, Fukuda M. [A prospective study on necessary and sufficient retinal photocoagulation for diabetic retinopathy]. Nippon Ganka Gakkai Zasshi 1993; 97:83-9. [PMID: 8434544] [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: 01/30/2023]
Abstract
The present studies were performed to determine whether slight photocoagulation was better than heavy photocoagulation for the early stage of progressive proliferative diabetic retinopathy (PDR). The authors selected 17 patients who had bilateral PDR of equal severity (BI or BII stage according to Fukuda's classification). In every case, we randomly performed heavy photocoagulation (laser burns were 1142 +/- 179) to one eye and slight photocoagulation (405 +/- 166) to the other eye. More than 6 months after the last photocoagulation, the effects of these treatments were compared in both eyes by fundus pictures, visual acuity and posterior vitreous fluorophotometric values. The results of judgement by fundus pictures and by vitreous fluorophotometric values were in perfect agreement. Eight cases (47%) in whom eyes received slight photocoagulation showed result better than the other eye. Two cases (12%) which received heavy photocoagulation were better than the other eye. Seven cases (41%) showed the same level of severity. No significant differences were found between slight and heavy photocoagulation.
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Affiliation(s)
- M Uehara
- Department of Ophthalmology, School of Medicine, University of the Ryukyus, Okinawa, Japan
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46
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Abstract
In this study, the effects of chronic water immersion stress on the pancreas were investigated in four groups of rats (each group, n = 9): stress + cerulein group, stress group, cerulein group, and control group. Stress + cerulein rats were treated with water immersion stress for 5 h and two intraperitoneal injections of 20 micrograms/kg body wt of cerulein once a week for 16 weeks. In the macroscopic findings of the pancreas, all rats in the stress+cerulein group exhibited moderate or distinctive congestion of blood vessels, gland atrophy, and fatty changes, while some of them showed bleeding. Microscopically, they all exhibited moderate or severe fibrosis, inflammatory cell infiltration, fatty changes, destruction of lobular architecture, and hemosiderin deposits, while some of them also showed bleeding. The stress group without treatment with cerulein injections showed slight fibrosis, hemosiderin deposits, and bleeding. The cerulein group without stress treatment showed fatty changes, but no inflammatory cell infiltration or fibrosis. In the stress + cerulein group only, the contents of digestive enzymes and protein in the pancreas were approximately 55% lower than those of the control group, whereas those in other groups did not show significant reduction. These findings suggest that stress plays some role in the development of chronic pancreatitis, perhaps by causing circulatory disturbance and blood vessel injury.
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Affiliation(s)
- S Takano
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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47
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Yamada Y, Kimiya K, Yamaguchi A, Sagiyama K, Hara S, Kinjo M. [Utricular papillomatosis. A case report]. Nihon Hinyokika Gakkai Zasshi 1992; 83:1134-7. [PMID: 1507731 DOI: 10.5980/jpnjurol1989.83.1134] [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: 12/27/2022]
Abstract
A case of utricular papillomatosis is reported herein. A 50-year-old male patient consulted our hospital with a complaint of asymptomatic macrohematuria. Endoscopic examination revealed papillomatous tumor tightly growing within the utricle. Transurethral resection of the tumor was performed. Histopathologically, the tumor consisted of numerous villous structures with slender fibrovascular cores and overlying cuboidal cells in 2 to 3 cell layers. Invasive growth or cellular atypia could not be found. Utricular papillomatosis is rare, and only one similar case was reported to my knowledge in the English literature for the last five years. Such rarity and peculiar clinicopathological characteristics prompted us to report this case.
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Affiliation(s)
- Y Yamada
- Division of Urology, Sanshinkai Hara Hospital, Fukuoka, Japan
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48
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Abstract
In order to investigate whether DNA ploidy in a single area of a tumor could be representative of the entire tumor, flow-cytometric DNA analysis was performed for multiple samples (an average of 7 samples) obtained from the same tumor in 9 cases of transitional cell carcinoma of the urinary bladder. The incidence of DNA aneuploidy was 88.9% (8 out of 9 cases) and, furthermore, in 7 of these, intratumoral regional heterogeneity in DNA ploidy was evident. With high frequency, bladder carcinoma consisted of heterogeneous cell populations with different ploidy. There were 2 cases in which the tumor consisted of mixed subpopulations of diploid and aneuploid clones which were located in different parts of the same tumor. In such cases, an aneuploid line could not have been detected in a single specimen from the tumors.
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Affiliation(s)
- K Sasaki
- Department of Pathology, Iwate Medical University School of Medicine, Morioka, Japan
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49
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Abstract
We report the effect of pressure support ventilation (PSV) on auto-PEEP in a patient with asthma. The patient showed a high level of auto-PEEP during spontaneous breathing through a T-piece. PSV effectively decreased auto-PEEP and inspiratory muscle effort with increasing levels of PSV.
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Affiliation(s)
- H Tokioka
- Department of Anesthesiology and Resuscitology, Okayama University Medical School, Japan
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50
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Hamano K, Kinjo M, Kumazawa J. Flow-cytometric deoxyribonucleic acid analysis of the human bladder cancers with reference to histopathological findings. Eur Urol 1992; 22:153-7. [PMID: 1478232 DOI: 10.1159/000474744] [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: 12/27/2022]
Abstract
Flow-cytometric (FCM) DNA analysis was performed in 534 samples from 140 bladder tumor cases and was compared with histopathological findings. Frequency of DNA aneuploidy was closely correlated with tumor grade. Namely the incidences of DNA aneuploidy were 20% in grade 0 (papilloma), 25.6% in grade 1, 57.7% in grade 2 and 95.7% in grade 3. Invasive tumors showed a significantly higher incidence of DNA aneuploidy than superficial papillary tumors. Frequency of DNA aneuploidy of CIS was between them. Nonpapillary tumors showed a significantly higher incidence of DNA aneuploidy than papillary tumors. Tumors with vessel invasion did show a similarly higher incidence than those without. Approximately 10% of histologically normal mucosa taken from the bladder tumor patients showed DNA aneuploidy. The present study could support possibilities that FCM findings were highly correlated with tumor malignant potentials and were also able to predict precancerous lesions on histologically normal mucosa.
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Affiliation(s)
- K Hamano
- Department of Urology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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