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Three-step modernization of the ocean:Modeling of carbon cycles and the revolution of ecological systems in the Ediacaran/Cambrian periods

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Geoscience Frontiers 2015年第1期6卷 121-136页

作者： Miyuki Tahata Yusuke Sawaki Yuichiro Ueno Manabu nishizawa Naohiro Yoshida Toshikazu Ebisuzaki Tsuyoshi Komiya Shigenori Maruyama Department of Earth and Planetary Sciences Tokyo Institute of Technology Earth-Life Science Institute Tokyo Institute of Technology Precambrian Ecosystem Laboratory Japan Agency for Marine-Earth Science and Technology(JAMSTEC) Department of Environmental Science and Technology Tokyo Institute of Technology RIKEN 2-1 Hirosawa Department of Earth Science and Astronomy The University of Tokyo Research Center for the Evolving Earth and Planets Tokyo Institute of Technology

Important ecological changes of the Earth （oxidization of the atmosphere and the ocean） increase in nutrient supply due to the break-up of the super continent （Rodinia） and the appearance of multi-cellular organisms （macroscopic algae and metazoan） took place in the Ediacaran period, priming the Cambrian explosion. The strong perturbations in carbon cycles in the ocean are recorded as excursions in carbonate and organic carbon isotope ratio （δ13Ccarb and δ13Corg） from the Ediacaran through early Cambrian periods. The Ediacaran-early Cambrian sediment records of δ13Ccarb and δ13Corg, obtained from the drill-core samples in Three Gorges in South China, are compared with the results of numerical simulation of a sim- ple one-zone model of the carbon cycle of the ocean, which has two reservoirs （i.e., dissolved organic carbon （DOC） and dissolved inorganic carbon （DIC）. The fluxes from the reservoirs are assumed to be proportional to the mass of the carbon reservoirs. We constructed a model, referred to here as the Best Fit Model （BFM）, which reproduce δ13Ccarb and δ13Corg records in the Ediacaran-early Cambrian period noted above. BFM reveals that the Shuram excursion is related to three major changes in the carbon cycle or the global ecological system of the Earth：（1） an increase in the coefficient of remineralization by a factor of ca. 100, possibly corresponding to a change in the dominant metabolism from anaerobic respiration to aerobic respiration, （2） an increase of carbon fractionation index from 25‰, to 33‰, possibly corresponding to the change in the primary producer from rock-living cyanobacteria to free-living macro algae, and （3） an in- crease in the coefficient of the organic carbon burial by a factor of ca. 100, possibly corresponding to the onset of a biological pump driven by the flourishing metazoan and zooplankton. The former two changes took place at the start of the Shuram excursion, while the third occurred at the end of the Shuram excursion. The ot

关键词： Carbon cycle change Carbon isotope ratio Ediacaran to Cambrian Oxygen level Evolution of life

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Rice-Specific Mitochondrial Iron-Regulated Gene （MIR） Plays an Important Role in Iron Homeostasis

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Molecular Plant 2009年第5期2卷 1059-1066页

作者： Yasuhiro Ishimaru Khurram Bashir Masaru Fujimoto Gynheung An Reiko Nakanishi Itai Nobuhiro Tsutsumi Hiromi Nakanishi Naoko K nishizawa Graduate School of Agricultural and Life Sciences The University of Tokyo 1-1-1 Yayoi Bunkyo-Ku Tokyo 113-8657 Japan Department of Life Sciences Pohang University of Science and Technology Pohang 790-784 Republic of Korea Research Institute for Bioresources and Biotechnology Ishikawa Prefectural University Ishikawa 921-8836 Japan

Mitochondria utilize iron （Fe）, but the proteins involved in mitochondrial Fe regulation are not characterized in plants. We cloned and characterized a mitochondrial iron-regulated （MIR） gene in rice involved in Fe homeostasis. MIR, when expressed in tobacco BY-2 cells, was localized to the mitochondria. MIR transcripts were greatly increased in response to Fe deficiency in roots and shoot tissue. MIR is not homologous to any known protein, as homologs were not found in the rice or Arabidopsis genome databases, or in the EST database for other organisms. Growth in the MIR T-DNA knockout rice mutant （mir） was significantly impaired compared to wild-type （WT） plants when grown under Fe-deficient or -sufficient conditions. Furthermore, mir plants accumulated more than twice the amount of Fe in shoot and root tissue compared to WT plants when grown under either Fe-sufficient or -deficient conditions. Despite the high accumulation of Fe in roots and shoots, mir plants triggered the expression of Fe-deficiency-inducible genes, indicating that mir may not be able to utilize Fe for physiological functions. These results clearly suggest that MIR is a rice-specific mitochondrial protein, recently evolved, and plays a significant role in Fe homeostasis.

关键词： Fe-deficiency-regulated gene Fe homeostasis mitochondria Oryza sativa.

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Ni-Al-Cr系富Ni区相平衡研究(英文)

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稀有金属材料与工程 2001年第3期30卷 173-177页

作者：贾成厂 Ishida Kiyohito nishizawa Taiji 北京科技大学 Tohoku大学

用热扩散偶实验和热力学模型研究和计算了Ｎｉ－Ａｌ－Ｃｒ系富Ｎｉ区γ，ａ，γ’和β相的相平衡。用规则溶体和亚点阵模型计算了该体系９００℃－１３００℃区间的等温截面，计算结果与实验值相符合。

关键词：相图高温合金热力学分析 Ni-Al-Cr系

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Temporal and spatial distribution of microfractures in granites of different structures under triaxial compression and its significance in seismology

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Chinese Science Bulletin 1999年第14期44卷 1321-1325页

作者： Liqiang Liu Shengli Ma Jin Ma Xinglin Lei K. Kusunose O. nishizawa L. Jouniaux China Seismol Bur Inst Geol Beijing 100029 Peoples R China Geol Survey Japan Tsukuba Ibaraki 305 Japan Ecole Normale Super Geol Lab F-75231 Paris France CNRS URA 1316 Paris France

The temporal and spatial distribution of microfracturing activity in two kinds of granite under triaxial compression has been studied by using a new acoustic emission system. For Inada granite, there is no clear clustering of acoustic emission events in time and space, thus it is difficult to exactly deduce the time and position of the major fracturing. While for Mayet granite,acoustic emission events are clustered in time and space, so the time and position of the major fracturing can be exactly predicted according to microfracturing process. Such a difference may result from the difference in deformation mode caused by different rock structures.

关键词： rock structure acoustic emission microfracturing temporal and spatial distribution seismicity.

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Changes of gastric ulcer bleeding in the metropolitan area of Japan

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World Journal of Gastroenterology 2019年第42期25卷 6342-6353页

作者： Yoko Kubosawa Hideki Mori Satoshi Kinoshita Yoshihiro Nakazato Ai Fujimoto Masahiro Kikuchi Toshihiro nishizawa Masayuki Suzuki Hidekazu Suzuki Department of Gastroenterology National Hospital Organization Tokyo Medical CenterMeguroTokyo 152-8902Japan Division of Gastroenterology and Hepatology Department of Internal MedicineKeio University School of MedicineShinjukuTokyo 160-0016Japan Department of Clinical and Experimental Medicine Translational Research Center for Gastrointestinal Diseases(TARGID)University of LeuvenLeuven 3000Belgium Department of Gastroenterology Digestive Disease CenterInternational University of Health and WelfareMita HospitalMinatoTokyo 108-8329Japan Division of Gastroenterology and Hepatology Department of Internal MedicineTokai University School of MedicineIseharaKanagawa 259-1193Japan

BACKGROUND The two main causes of gastric ulcer bleeding are Helicobacter pylori(***)infection and ulcerogenic medicines,although the number of cases caused by each may vary with *** Japan,the rate of *** infection has fallen over the last decade and the number of prescriptions for non-steroidal anti-inflammatory drugs(NSAIDs)and antithrombotic drugs is increasing as the population *** of treatment for gastric ulcer bleeding have advanced with the advent of hemostatic forceps and potassium-competitive acid blocker(P-CAB).Thus,causes and treatments for gastric ulcer bleeding have changed over the last *** To examine the trends of gastric ulcer bleeding over 10 years in the metropolitan area of *** This is a single-center retrospective study.A total of 564 patients were enrolled from inpatients admitted to our hospital with gastric ulcer bleeding between 2006 and ***,medication history,*** infection,method of treatment,rate of rebleeding,and the length of hospitalization were *** associated with gastric ulcer bleeding were evaluated using Fisher’s exact test,Pearson’s Chi-squared test or Student’s t-test as *** Jonckheere-Terpstra test was used to evaluate trends.A per-protocol analysis was used to examine the rate of *** *** There was a significant increase in the mean age over time(P<0.01).The rate of *** infection tended to decrease over the study period(P=0.10),whereas the proportion of patients taking antithrombotic agents or NSAIDs tended to increase(P=0.07).Over time,the use of NSAIDs and antithrombotic drugs increased with *** contrast,the rate of *** infection during the study period fell with ***-induced ulcers accounted for the majority of cases in younger patients(<70 years old);however,the rate decreased with age(P<0.01).The method of treatment trend has changed significantly over *** main method of endoscopic hemostasis has changed from

关键词： Helicobacter pylori infection Gastric ulcer bleeding Non-steroidal antiinflammatory drugs Antithrombotic agents

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Dual therapy for third-line Helicobacter pylori eradication and urea breath test prediction

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World Journal of Gastroenterology 2012年第21期18卷 2735-2738页

作者： Toshihiro nishizawa Hidekazu Suzuki Takama Maekawa Naohiko Harada Tatsuya Toyokawa Toshio Kuwai Masanori Ohara Takahiro Suzuki Masahiro Kawanishi Kenji Noguchi Toshiyuki Yoshio Shinji Katsushima Hideo Tsuruta Eiji Masuda Munehiro Tanaka Shunsuke Katayama Norio Kawamura Yuko nishizawa Toshifumi Hibi Masahiko Takahashi Division of Gastroenterology National Hospital Organization Tokyo Medical CenterTokyo 1528902 Japan Division of Gastroenterology and Hepatology Department of Internal Medicine Keio University School of MedicineTokyo 1608582 Japan Division of Gastroenterology National Hospital Organization Kyoto Medical CenterKyoto 6128555 Japan Division of Gastroenterology National Kyushu Medical CenterFukuoka 8108563 Japan Division of Gastroenterology National Hospital Organization Fukuyama Medical CenterFukuyama 7208520 Japan Division of Gastroenterology National Hospital Organization Kure Medical CenterKure 7370023 Japan Division of Gastroenterology National Hospital Organization Hakodate Medical CenterHakodate 0418512 Japan Division of Gastroenterology National Hospital Organization Maizuru Medical CenterMaizuru 6258502 Japan Division of Gastroenterology National Hospital Organization Higashihiroshima Medical CenterHigashihiroshima 7390041 Japan Division of Gastroenterology National Hospital Organization Sendai Medical CenterSendai 9838520 Japan Division of Gastroenterology National Hospital Organization Osaka Medical CenterOsaka 5400006 Japan Division of Gastroenterology National Hospital Organization Ureshino Medical CenterUreshino 8430393 Japan Division of Gastroenterology National Hospital Organization Osaka Minami Medical CenterKawachinagano 5868521 Japan Division of Gastroenterology National Hospital Organization Fukuoka Higashi Medical CenterKoga 8113195 Japan Division of Gastroenterology National Hospital Organization Yonago Medical CenterYonago 6838518 Japan Division of Gastroenterology National Hospital Organization Disaster Medical CenterTachikawa 1900014 Japan Pharmaceutical Department National Center for Global Health and MedicineTokyo 1658655 Japan

We evaluated the efficacy and tolerability of a dual therapy with rabeprazole and amoxicillin (AMX) as an empiric third-line rescue therapy. In patients with failure of first-line treatment with a proton pump inhibitor (PPI)- AMX-clarithromycin regimen and second-line treatment with the PPI-AMX-metronidazole regimen, a third-line eradication regimen with rabeprazole (10 mg q.i.d.) and AMX (500 mg q.i.d.) was prescribed for 2 wk. Eradication was confirmed by the results of the 13C-urea breath test (UBT) at 12 wk after the therapy. A total of 46 patients were included; however, two were lost to followup. The eradication rates as determined by per-protocol and intention-to-treat analyses were 65.9% and 63.0%,respectively. The pretreatment UBT results in the subjects showing eradication failure; those patients showing successful eradication comprised 32.9 ± 28.8 permil and 14.8 ± 12.8 permil, respectively. The pretreatment UBT results in the subjects with eradication failure were significantly higher than those in the patients with successful eradication (P = 0.019). A low pretreatment UBT result (≤ 28.5 permil) predicted the success of the eradication therapy with a positive predictive value of 81.3% and a sensitivity of 89.7%. Adverse effects were reported in 18.2% of the patients, mainly diarrhea and stomatitis. Dual therapy with rabeprazole and AMX appears to serve as a potential empirical third-line strategy for patients with low values on pretreatment UBT.

关键词： Helicobacter pylori Amoxicillin Dual therapy Eradication Urea breath test

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Endoscopy-based Kyoto classification score of gastritis related to pathological topography of neutrophil activity

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World Journal of Gastroenterology 2020年第34期26卷 5146-5155页

作者： Osamu Toyoshima Toshihiro nishizawa Shuntaro Yoshida Yoshiki Sakaguchi Yousuke Nakai Hidenobu Watanabe Hidekazu Suzuki Chizu Tanikawa Koichi Matsuda Kazuhiko Koike Department of Gastroenterology Toyoshima Endoscopy ClinicTokyo 157-0066Japan Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Department of Gastroenterology and Hepatology International University of Health and WelfareNarita HospitalChiba 286-8520Japan Department of Endoscopy and Endoscopic Surgery Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Department of Pathology Pathology and Cytology Laboratory JapanTokyo 166-0003Japan Department of Gastroenterology and Hepatology Tokai University School of MedicineKanagawa 259-1193Japan Laboratory of Molecular Medicine Human Genome CenterInstitute of Medical ScienceThe University of TokyoTokyo 108-8639Japan Department of Computational Biology and Medical Sciences Laboratory of Clinical Genome SequencingGraduate School of Frontier SciencesThe University of TokyoTokyo 108-8639Japan

BACKGROUND Endoscopy-based Kyoto classification for gastritis and pathological topographic distribution of neutrophil infiltration are correlated with gastric cancer *** To investigate the association between Kyoto classification and the topographic distribution of neutrophil *** Kyoto classification score,ranging from 0 to 8,consisted of atrophy,intestinal metaplasia,enlarged folds,nodularity,and diffuse *** activity was scored according to the updated Sydney System using biopsy samples obtained from the greater curvature of the corpus and the *** participants were divided into four categories,inactive stomach,antrumpredominant gastritis,pangastritis,and corpus-predominant gastritis,based on the topographic distribution of neutrophil *** of sex,age,body mass index,drinking habit,smoking habit,family history of gastric cancer,serum Helicobacter pylori(***)antibody,and Kyoto score on topography of neutrophil infiltration were *** A total of 327 patients(comprising 50.7%women,with an average age of 50.2 years)were enrolled in this *** infection rate was 82.9%with a mean Kyoto score of *** Kyoto score was associated with the topographic distribution of neutrophil *** scores were significantly higher in the order of inactive stomach,antrum-predominant gastritis,pangastritis,and corpuspredominant gastritis(3.05,4.57,5.21,and 5.96,respectively).Each individual score of endoscopic findings(i.e.,atrophy,intestinal metaplasia,enlarged folds,nodularity,and diffuse redness)was correlated with the topographic distribution of neutrophil *** multivariate analysis,the Kyoto score,age,and serum *** antibody were independently associated with the topographic distribution of neutrophil *** The Kyoto classification score was associated with the topographic distribution of neutrophil activity.

关键词： Kyoto classification Helicobacter pylori Neutrophil activity Updated Sydney System Gastritis Gastric cancer Endoscopy Pathology

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Gastric cancer incidence based on endoscopic Kyoto classification of gastritis

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世界胃肠病学杂志:英文版 2023年第31期29卷 4763-4773页

作者： Osamu Toyoshima Toshihiro nishizawa Shuntaro Yoshida Tatsuya Matsuno Gota Fujisawa Akira Toyoshima Hirotoshi Ebinuma Mitsuhiro Fujishiro Yutaka Saito Hidekazu Suzuki Department of Gastroenterology Toyoshima Endoscopy ClinicTokyo 157-0066Japan Department of Gastroenterology and Hepatology International University of Health and WelfareNarita HospitalNarita 286-8520Japan Department of Colorectal Surgery Japanese Red Cross Medical CenterTokyo 150-8935Japan Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Division of Endoscopy National Cancer Center HospitalTokyo 104-0045Japan Division of Gastroenterology and Hepatology Department of Internal MedicineTokai University School of MedicineIsehara 259-1193Japan

BACKGROUND Gastric cancer(GC)incidence based on the endoscopic Kyoto classification of gastritis has not been systematically investigated using time-to-event *** To examine GC incidence in an endoscopic surveillance *** This study was retrospectively conducted at the Toyoshima Endoscopy *** who underwent two or more esophagogastroduodenoscopies were *** incidence was based on Kyoto classification scores,such as atrophy,intestinal metaplasia(IM),enlarged folds(EFs),nodularity,diffuse redness(DR),and total Kyoto *** ratios(HRs)adjusted for age and sex were calculated using a Cox hazard *** A total of 6718 patients were enrolled(median age 54.0 years;men 44.2%).During the follow-up period(max 5.02 years;median 2.56 years),GC developed in 34 *** average frequency of GCs per year was 0.19%.Kyoto atrophy scores 1[HR with score 0 as reference:3.66,95%confidence interval(CI):1.06 to 12.61],2(11.60,3.82-35.27),IM score 2(9.92,4.37-22.54),EF score 1(4.03,1.63-9.96),DR scores 1(6.22,2.65-14.56),and 2(10.01,3.73-26.86)were associated with GC incidence,whereas nodularity scores were *** total Kyoto scores of 4(HR with total Kyoto scores 0-1 as reference:6.23,95%CI:1.93 to 20.13,P=0.002)and 5-8(16.45,6.29-43.03,P<0.001)were more likely to develop GC,whereas the total Kyoto scores 2-3 were *** HR of the total Kyoto score for developing GC per 1 rank was 1.75(95%CI:1.46 to 2.09,P<0.001).CONCLUSION A high total Kyoto score(≥4)was associated with GC *** endoscopy-based diagnosis of gastritis can stratify GC risk.

关键词： Gastric cancer Gastritis Endoscopy Atrophy Intestinal metaplasia Kyoto classification

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Endoscopic diagnosis for colorectal sessile serrated lesions

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World Journal of Gastroenterology 2021年第13期27卷 1321-1329页

作者： Toshihiro nishizawa Shuntaro Yoshida Akira Toyoshima Tomoharu Yamada Yoshiki Sakaguchi Taiga Irako Hirotoshi Ebinuma Takanori Kanai Kazuhiko Koike Osamu Toyoshima Department of Gastroenterology and Hepatology International University of Health and Welfare Narita HospitalNarita 2868520Japan Department of Gastroenterology Toyoshima Endoscopy ClinicTokyo 1570066Japan Department of Colorectal Surgery Japanese Red Cross Medical CenterTokyo 1508935Japan Department of Gastroenterology The University of TokyoTokyo 1138655Japan Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 1138655Japan Department of Internal Medicine Irako ClinicTokyo 1560052Japan Division of Gastroenterology and Hepatology Department of Internal MedicineKeio University School of MedicineShinjuku-ku 1608582TokyoJapan

BACKGROUND Hyperplastic polyps are considered non-neoplastic, whereas sessile serrated lesions(SSLs) are precursors of cancer via the ‘‘serrated neoplastic pathway’’. The clinical features of SSLs are tumor size(> 5 mm), location in the proximal colon, coverage with abundant mucus called the ‘‘mucus cap’’, indistinct borders, and a cloud-like surface. The features in magnifying narrow-band imaging are varicose microvascular vessels and expanded crypt openings. However, accurate diagnosis is often *** To develop a diagnostic score system for *** We retrospectively reviewed consecutive patients who underwent endoscopic resection during colonoscopy at the Toyoshima endoscopy clinic. We collected data on serrated polyps diagnosed by endoscopic or pathological examination. The significant factors for the diagnosis of SSLs were assessed using logistic regression analysis. Each item that was significant in multivariate analysis was assigned 1 point, with the sum of these points defined as the endoscopic SSL diagnosis score. The optimal cut-off value of the endoscopic SSL diagnosis score was determined by receiver-operating characteristic curve *** Among 1288 polyps that were endoscopically removed, we analyzed 232 diagnosed as serrated polyps by endoscopic or pathological examination. In the univariate analysis, the location(proximal colon), size(> 5 mm), mucus cap, indistinct borders, cloud-like surface, and varicose microvascular vessels were significantly associated with the diagnosis of SSLs. In the multivariate analysis, size(> 5 mm;P = 0.033), mucus cap(P = 0.005), and indistinct borders(P = 0.033) were independently associated with the diagnosis of SSLs. Size > 5 mm, mucus cap, and indistinct borders were assigned 1 point each and the sum of these points was defined as the endoscopic SSL diagnosis score. The receiver-operating characteristic curve analysis showed an optimal cut-off score of 3, which predicted pathological SSLs with 75

关键词： Sessile serrated lesion Mucus cap Indistinct borders Hyperplastic polyp Endoscopic features Size

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Clinical features of cardiac nodularity-like appearance induced by Helicobacter pylori infection

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World Journal of Gastroenterology 2020年第35期26卷 5354-5361页

作者： Toshihiro nishizawa Kosuke Sakitani Hidekazu Suzuki Shuntaro Yoshida Yosuke Kataoka Yousuke Nakai Hirotoshi Ebinuma Takanori Kanai Osamu Toyoshima Kazuhiko Koike Department of Gastroenterology Toyoshima Endoscopy ClinicTokyo 1570066Japan Department of Gastroenterology Narita HospitalInternational University of Health and WelfareChiba 2868520Japan Department of Gastroenterology Sakitani Endoscopy ClinicChiba 2740825Japan Department of Internal Medicine Tokai University School of MedicineKanagawa 2591193Japan Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 1138655Japan Department of Internal Medicine Keio University School of MedicineTokyo 1608582Japan

We have previously reported that Helicobacter pylori(***)-associated nodular gastritis could occur in both the antrum and the *** nodularity-like appearance(hereafter,called as cardiac nodularity)had a high predictive accuracy for the diagnosis of *** *** the previous study,we included only the patients who were evaluated for *** infection for therst time,and excluded patients with a history of ***,the prevalence and clinical features of cardiac nodularity remains *** To perform this cross-sectional study to explore the characteristics of cardiac *** Consecutive patients who underwent esophagogastroduodenoscopy betweenMay,2017 and August,2019 in the Toyoshima Endoscopy Clinic were enrolled in this *** included ***-negative,***-positive,and *** patients,and excluded patients with unclear *** status and eradication *** infection was diagnosed according to serum *** antibody and the urea breath test or *** nodularity was defined as a miliary nodular appearance or the presence of scattered whitish circular small colorations within 2 cm of the esophagogastric *** was visualized as whitish in the narrow-band imaging *** collected data on the patients’baseline *** A total of 1078 patients were finally *** ***-negative patients,cardiac nodularity and antral nodularity were recognized in 0.14%*** ***-positive patients,cardiac nodularity and antral nodularity were recognized in 54.5%and 29.5%,*** ***-eradicated patients,cardiac nodularity and antral nodularity were recognized in 4.5%and 0.6%,*** frequency of cardiac nodularity was significantly higher than that of antral nodularity in ***-positive and-eradicated *** frequencies of cardiac nodularity and antral nodularity in ***-eradicated patients were significa

关键词： Cardia Nodularity Helicobacter pylori Diagnosis Gastritis

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