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Proton pump inhibitor step-down therapy for GERD:A multi-center study in Japan

World Journal of Gastroenterology 2011年第11期17卷 1480-1487页

作者： Takao Tsuzuki Hiroyuki Okada Yoshiro Kawahara ryuta takenaka Junichiro Nasu Hidehiko Ishioka Akiko Fujiwara Fumiya Yoshinaga Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan Department of Internal Medicine Tsuyama Central HospitalOkayama 708-0841Japan Ishioka clinic Hiroshima 721-0926Japan Department of Internal Medicine Okayama Saiseikai General HospitalOkayama 700-8511Japan Deparment of Internal Medicine Mihara Red Cross HospitalHiroshima 723-8512Japan

AIM:To investigate the predictors of success in stepdown of proton pump inhibitor and to assess the quality of life(QOL).METHODS:Patients who had heartburn twice a week or more were treated with 20 mg omeprazole(OPZ) once daily for 8 wk as an initial therapy(study 1).Patients whose heartburn decreased to once a week or less at the end of the initial therapy were enrolled in study 2 and treated with 10 mg OPZ as maintenance therapy for an additional 6 mo(study 2).QOL was in-vestigated using the gastrointestinal symptom rating scale(GSRS)before initial therapy,after both 4 and 8 wk of initial therapy,and at 1,2,3,and 6 mo after starting maintenance ***:In study 1,108 patients were *** characteristics were as follows;median age:63(range: 20-88)years,sex:46 women and 62 *** success rate of the initial therapy was 76%.In the patients with successful initial therapy,abdominal pain,indigestion and reflux GSRS scores were *** study 2,83 patients were *** of 83 patients completed the study 2 *** the per-protocol analysis,80%of 70 patients were successful for *** multivariate analysis of baseline demographic data and clinical information,no previous treatment for gastroesophageal reflux disease(GERD)[odds ratio (OR)0.255,95%CI:0.06-0.98]and a lower indigestion score in GSRS at the beginning of step-down therapy(OR 0.214,95%CI:0.06-0.73)were found to be the predictors of successful step-down *** improved GSRS scores by initial therapy were maintained through the step-down ***:OPZ was effective for most GERD ***,those who have had previous treatment for GERD and experience dyspepsia before stepdown require particular monitoring for relapse.

关键词： Gastroesophageal reflux disease Proton pump inhibitor Omeprazole Step-down therapy Gastrointestinal symptom rating scale

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Tolerability of magnifying narrow band imaging endoscopy for esophageal cancer screening

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World Journal of Gastroenterology 2015年第9期21卷 2793-2799页

作者： Yasushi Yamasaki ryuta takenaka Keisuke Hori Koji Takemoto Seiji Kawano Yoshiro Kawahara Hiroyuki Okada Shigeatsu Fujiki Kazuhide Yamamoto Department of Gastroenterology Tsuyama Chuo HospitalTsuyamaOkayama 708-0841Japan 2nd Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan Division of Endoscopy Okayama University HospitalOkayama 700-8558Japan Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan

AIM:To compare the tolerability of magnifying narrow band imaging endoscopy for esophageal cancer screening with that of lugol ***:We prospectively enrolled and analyzed 51 patients who were at high risk for esophageal *** patients were divided into two groups:a magnifying narrow band imaging group,and a lugol chromoendoscopy group,for comparison of adverse *** cancer screening was performed on withdrawal of the *** primary endpoint was a score on a visual analogue scale for heartburn after the *** secondary endpoints were scale scores for retrosternal pain and dyspnea after the examinations,change in vital signs,total procedure time,and esophageal observation ***:The scores for heartburn and retrosternal pain in the magnifying narrow band imaging group were significantly better than those in the lugol chromoendoscopy group(P =0.004,0.024,respectively,ANOVA for repeated measures).The increase in heart rate after the procedure was significantly greater in the lugol chromoendoscopy *** was no significant difference between the two groups with respect to othervital *** total procedure time and esophageal observation time in the magnifying narrow band imaging group were significantly shorter than those in the lugol chromoendoscopy group(450 ± 116 vs 565 ± 174,P =0.004,44 ± 26 vs 151 ± 72,P < 0.001,respectively).CONCLUSION:Magnifying narrow band imaging endoscopy reduced the adverse symptoms compared with lugol *** band imaging endoscopy is useful and suitable for esophageal cancer screening periodically.

关键词： Narrow band imaging Lugol Adverse symptoms Visual

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Chromoendoscopy of gastric adenoma using an acetic acid indigocarmine mixture

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World Journal of Gastroenterology 2014年第17期20卷 5092-5097页

作者： Yoshiyasu Kono ryuta takenaka Yoshiro Kawahara Hiroyuki Okada Keisuke Hori Seiji Kawano Yasushi Yamasaki Koji Takemoto Takayoshi Miyake Shigeatsu Fujiki Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan 2~(nd) Department of Internal Medicine Tsuyama Chuo HospitalOkayama 708-0841Japan Department of Internal Medicine Tsuyama Chuo HospitalOkayama 708-0841Japan Department of Endoscopy Okayama University HospitalOkayama 700-8558Japan Department of Pathology Tsuyama Chuo HospitalOkayama 708-0841Japan

AIM: To investigate the usefulness of chromoendoscopy, using an acetic acid indigocarmine mixture (AIM), for gastric adenoma diagnosed by forceps biopsy.

关键词： Acetic acid indigocarmine mixture Early gastric cancer Gastric adenoma Reddish change Endoscopic submucosal dissection

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Management of gastric mucosa-associated lymphoid tissue lymphoma in patients with extra copies of the MALT1 gene

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World Journal of Gastroenterology 2017年第33期23卷 6155-6163页

作者： Masaya Iwamuro ryuta takenaka Masahiro Nakagawa Yuki Moritou Shunsuke Saito Shinichiro Hori Tomoki Inaba Yoshinari Kawai Tatsuya Toyokawa Takehiro Tanaka Tadashi Yoshino Hiroyuki Okada Department of Gastroen-terology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical Sciences Department of Internal Medicine Tsuyama Chuo Hospital Department of Internal Medicine Hiroshima City Hospital Department of Gastroenterology Mitoyo General Hospital Department of Internal Medicine Okayama Saiseikai General Hospital Department of Gastroenterology Shikoku Cancer Center Department of Gastroenterology Kagawa Prefectural Central Hospital Department of Gastroenterology Onomichi Municipal Hospital Department of Gastroenterology Fukuyama Medical Center Department of Pathology Okayama University Hospital Department of Pathology Okayama University Graduate School of MedicineDentistryand Pharmaceutical Sciences

AIM To identify the clinical features of gastric mucosaassociated lymphoid tissue(MALT) lymphoma with extra copies of *** This is a multi-centered,retrospective study. We reviewed 146 patients with MALT lymphoma in the stomach who underwent fluorescence in situ hybridization analysis for t(11;18) translocation. Patients were subdivided into patients without t(11;18) translocation or extra copies of MALT1(Group A,n = 88),patients with t(11;18) translocation(Group B,n = 27),and patients with extra copies of MALT1(Group C,n = 31). The clinical background,treatment,and outcomes of each group were *** Groups A and C showed slight female predominance,whereas Group B showed slight male predominance. Mean ages and clinical stages at lymphoma diagnosis were not different between groups. Complete response was obtained in 61 patients in Group A(69.3%),22 in Group B(81.5%),and 21 in Group C(67.7%). Helicobacter pylori(H. pylori) eradication alone resulted in complete remission in 44 patients in Group A and 13 in Group C. In Group B,14 patients underwent radiotherapy alone,which resulted in lymphoma disappearance. Although the difference was not statistically significant,event-free survival in Group C tended to be inferior to that in Group A(P = 0.10).CONCLUSION Patients with t(11;18) translocation should be treated differently from others. Patients with extra copies of MALT1 could be initially treated with H. pylori eradication,similar to patients without t(11;18) translocation or extra copies of MALT1.

关键词： Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue Gastric neoplasms Esophagogastroduodenoscopy t(11 18) translocation Trisomy 18

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Randomized study of lafutidine vs lansoprazole in patients with mild gastroesophageal reflux disease

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World Journal of Gastroenterology 2016年第23期22卷 5430-5435页

作者： ryuta takenaka Hiroyuki Okada Seiji Kawano Yoshinori Komazawa Fumiya Yoshinaga Shinji Nagata Masafumi Inoue Hirohisa Komatsu Seiji Onogawa Yoshinori Kushiyama Shinichi Mukai Hiroko Todo Hideharu Okanobu Noriaki Manabe Shinji Tanaka Ken Haruma Yoshikazu Kinoshita Department of Gastroenterology Tsuyama Chuo Hospital Tsuyama 708-0841 Japan Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama 708-0841 Japan Division of Internal Medicine Izumo City General Medical Center Izumo 691-0003 Japan Department of Gastroenterology Mihara Red Cross Hospital Mihara 723-0011 Japan Department of Endoscopy Hiroshima City Asa Citizens Hospital Hiroshima 731-0293 Japan Department of Gastroenterology Okayama Red Cross Hospital Okayama 700-0941 Japan Department of Gastroenterology Hiroshima General Hospital Hiroshima 734-8551 Japan Department of Gastroenterology Onomichi General Hospital Onomichi 722-8508 Japan Department of Gastroenterology Matsue Red Cross Hospital Matsue 690-8506 Japan Department of Gastroenterology Miyoshi Central Hospital Miyoshi 728-0023 Japan Department of Gastroenterology Hiroshima-Nishi Medical Center Hiroshima 739-0651 Japan Department of Gastroenterology Chugoku Rosai Hospital Kure 737-0134 Japan Department of Gastroenterology Kawasaki Medical School Hospital Kurashiki 701-0192 Japan Department of Endoscopy Hiroshima University Hospital Hiroshima 734-8551 Japan Department of General Internal Medicine 2 Kawasaki Hospital Kawasaki Medical School Okayama 708-0841 Japan Department of Gastroenterology and Hepatology Shimane University Hospital Izumo 693-0021 Japan

AIM: To compare the clinical efficacy of the secondgeneration H2 RA lafutidine with that of lansoprazole in Japanese patients with mild gastroesophageal reflux disease(GERD). METHODS: Patients with symptoms of GERD and a diagnosis of grade A reflux esophagitis(according to the Los Angeles classification) were randomized to receive lafutidine(10 mg, twice daily) or lansoprazole(30 mg, once daily) for an initial 8 wk, followed by maintenance treatment comprising half-doses of the assigned drug for 24 wk. The primary endpoint was the frequency and severity of heartburn during initial and maintenance treatment. The secondary endpoints were the sum score of questions 2 and 3 in the Gastrointestinal Symptom Rating Scale(GSRS), and the satisfaction ***: Between April 2012 and March 2013, a total of 53 patients were enrolled, of whom 24 and 29 received lafutidine and lansoprazole, respectively. After 8 wk, the frequency and severity of heartburn was significantly reduced in both groups. However, lafutidine was significantly inferior to lansoprazole with regard to the severity of heartburn during initial and maintenance treatment(P = 0.016). The sum score of questions 2 and 3 in the GSRS, and satisfaction scores were also significantly worse in the lafutidine group than the lansoprazole group(P = 0.0068 and P = 0.0048, respectively).CONCLUSION: The clinical efficacy of lafutidine was inferior to that of lansoprazole, even in Japanese patients with mild GERD.

关键词： Gastroesophageal reflux disease Proton pump inhibitors Histamine receptor-2 antagonists Los Angeles classification

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How Complex Are the Editosomes in Plant Organelles?

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Molecular Plant 2014年第4期7卷 582-585页

作者： Mizuki takenaka Molekulare Botanik Universitat Ulm 89069 Ulm Germany

In chloroplasts and mitochondria of most land plants, RNA editing modifies specific nucleotides. The individual nucleotides are identified in the complex RNA molecule population of either organelle by their sequence context. The biochemical reaction is in effect a C-to-U deamination in flowering plants, in addition a U-to-C amination reaction occurs in ferns and hornworts.

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SH-wavefield simulation for a laterally heterogeneous whole-Earth model using the pseudospectral method

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Science China Earth Sciences 2011年第12期54卷 1940-1947页

作者： WANG YanBin takenaka Hiroshi Department of Geophysics School of Earth and Space Sciences Peking University Beijing 100871 China Department of Earth and Planetary Sciences Kyushu University Hakozaki 6-10-1 Fukuoka 812-8581 Japan

We present a scheme to simulate SH-wave propagation in a whole-Earth model with arbitrary lateral heterogeneities employing the Fourier pseudospectral method. Wave equations are defined in two-dimensional cylindrical coordinates and the model is taken through a great circle of the Earth. Spatial derivatives in the wave equations are calculated in the wavenumber domain by multiplication, and the transformation between spatial and wavenumber domains is performed via fast Fourier transformation. Because of the high accuracy and high speed of the Fourier pseudospectral method, the scheme enables us to calculate a short-wavelength global SH-wavefield with accurate waveforms and arrival times for models with heterogeneities that can be approximated as azimuthally symmetric. Comparing with two-dimensional simulation methods based on an axisymmetric model, implementing the seismic source in the present scheme is more convenient. We calculated the global SH-wavefield for the preliminary reference Earth model to identify the generation, reflection and refraction of various seismic phases propagating in the Earth. Applications to a heterogeneous global model with low-velocity perturbation above the core-mantle boundary were conducted to analyze the effect of lateral heterogeneity on global SH-wave propagation.

关键词： wave propagation computational seismology pseudospectral method global seismology core-mantle boundary

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Genetic analysis of group composition and relatedness in white-headed langurs

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Integrative Zoology 2013年第4期8卷 410-416页

作者： Zhijin LIU Chengming HUANG Qihai ZHOU Youbang Li Yuefeng WANG Ming LI Osamu takenaka Akiko takenaka Key Laboratory of Animal Ecology and Biological Conservation Institute of ZoologyChinese Academy of SciencesBeijingChina Provincial Key Laboratory of Ecology Guangxi Normal UniversityGuangxiChina Primate Research Institute Kyoto UniversityInuyamaJapan Nagoya Bunri University Nagoya Japan

We collected fecal samples of white-headed langurs from 3 of the 4 remaining habitat fragments(Fa,Fb and CZ)located in southwestern Guangxi,China in Nov 2005,and used 5 microsatellite loci and the SRY gene to assess the relatedness between 46 langurs within and between *** observed 2 forms of group structure:one-male/multi-female groups(OMGs)and all-male groups(AMGs).One AMG in Fa was composed of 2 generations,included a father,2 sons and 1 unrelated male,and all OMGs in all 3 habitats included 1 resident male,several adult females and *** the 21 identified father-offspring cases,the resident male fathered 20(95%)and the non-resident male sired 1(5%),suggesting that adult males had overwhelming priority of access to females as the resident male in an OMG,while the non-resident male may also have the opportunity to adopt surreptitious mating strategies.

关键词： langur microsatellites paternity reproductive strategy Trachypithecus poliocephalus leucocephalus

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A scheme to treat the singularity in global seismic wavefield simulation using pseudospectral method with staggered grids

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Earthquake Science 2010年第2期23卷 121-127页

作者： Yanbin Wang Hiroshi takenaka Department of Geophysics School of Earth and Space Sciences Peking University Beijing 100871 China Department of Earth and Planetary Sciences Kyushu University Hakozaki 6-10-1 Fukuoka 812-8581 Japan

The pseudospectral method has been applied to the simulation of seismic wave propagation in 2-D global Earth model. When a whole Earth model is considered, the center of the Earth is included in the model and then singularity arises at the center of the Earth where r=0 since the 1/r term appears in the wave equations. In this paper, we extended the global seismic wavefield simulation algorithm for regular grid mesh to staggered grid configuration and developed a scheme to solve the numerical problems associated with the above singularity for a 2-D global Earth model defined on staggered grid using pseudospectral method. This scheme uses a coordinate transformation at the center of the model, in which the field variables at the center are calculated in Cartesian coordinates from the values on the grids around the center. It allows wave propagation through the center and hence the wavefield at the center can be stably calculated. Validity and accuracy of the scheme was tested by compared with the discrete wavenumber method. This scheme could also be suitable for other numerical methods or models parameterized in cylindrical or spherical coordinates when singularity arises at the center of the model.

关键词： seismic modeling wave propagation whole Earth pseudospectrai method staggered grid

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Comparative study on water-soluble inorganic ions in PM2.5 from two distinct climate regions and air quality

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Journal of Environmental Sciences 2020年第2期32卷 349-360页

作者： Duong Huu Huy Le Tu Thanh To Thi Hien Norimichi takenaka Faculty of Food Science and Technology Ho Chi Minh City University of Food Industry140 Le Trong Tan StreetTan Phu DistrictHo Chi Minh CityViet Nam Faculty of Environment University of ScienceVietnam National University–Ho Chi Minh City227 Nguyen Van Cu StreetDistrict 5Ho Chi Minh CityViet Nam Graduate School of Humanities and Sustainable System Sciences Osaka Prefecture University1-1 Gakuen-choNaka-kuSakai-shiOsaka 599-8531Japan

Recently, air quality has significantly improved in developed country, but that issue is of concern in emerging megacity in developing *** this study, aerosols and their precursor gas were collected by NILU filter pack at two distinct urban sites during the winter and summer in Osaka, Japan and dry and rainy seasons in Ho Chi Minh City(HCMC),*** aims are to investigate the contribution of water-soluble inorganic ions(WSIIs) to PM2.5, thermodynamic characterization and possible formation pathway of secondary inorganic aerosol(SIA).The PM2.5 concentration in Osaka(15.8 μg/m^3) is lower than that in HCMC(23.0 μg/m^3), but the concentration of WSIIs in Osaka(9.0 μg/m^3) is two times higher than that in HCMC(4.1 μg/m^3).Moreover, SIA including NH4^+, NO3^-and SO4^2-are major components in WSIIs accounting for 90% and 76%(in molar) in Osaka and HCMC,*** models were used to understand the thermodynamic characterization of urban ***, statistical analysis results indicate that very good agreement(R2> 0.8) was found for all species, except for nitrate aerosol in *** found that when the crustal species present at high amount, those compositions should be included in model calculation(*** the HCMC situation).Finally, we analyzed the characteristics of NH4^+– NO3^-– SO4^2-system.A possible pathway to produce fine nitrate aerosol in Osaka is via the homogeneous reaction between NH3 and HNO3, while nonvolatile nitrate aerosols can be formed by the heterogeneous reactions in HCMC.

关键词： Water-soluble inorganic ions Thermodynamic model PM2.5

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