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Eubacterium limosum ameliorates experimental colitis and metabolite of microbe attenuates colonic inflammatory action with increase of mucosal integrity

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World Journal of Gastroenterology 2006年第7期12卷 1071-1077页

作者： Osamu Kanauchi Masanobu Fukuda Yoshiaki Matsumoto Shino Ishii Toyokazu Ozawa Makiko Shimizu keiichi mitsuyama Akira Andoh Kirin Brewery Co.Ltd. 10-1-2 Shinkawa Chuo-kuTokyo104-8288Japan College of Pharmacy Nihon University 7-7-1 Narashinodai FunabashiChiba 274-8555Japan Department of Clinical Pharmacology and Toxicology Showa Pharmaceutical University3-3165Higashi-TamagawagakuenMachidaTokyo194-8543Japan Kurume University School of Medicine 67 Asahi-machiKurumeFukuoka 830-0011Japan Shiga University of Medical Science TsukinowaSetaOtsuShiga520-2100Japan

AIM： To examine the effect of Eubacteriuro Iiroosuro （***） on colonic epithelial cell line in vitro, and to evaluate the effect of *** on experimental colitis.METHODS： *** was inoculated anaerobically and its metabolites were obtained. The growth stimulatory effect of the *** metabolites on T84 cells was evaluated by SUDH activity, and the anti-inflammatory effect by IL-6 production. The change in mRNA of toll like receptor 4 （TLR4） was evaluated by real time PCR. Colitis was induced by feeding BALB/C mice with 2.0% dextran sodium sulfate. These mice received either 5% lyophilized *** （n=7） or control diet （n=7）. Seven days after colitis induction, clinical and histological scores, colon length, and cecal organic acid levels were determined.RESULTS： The *** produced butyrate, acetate, propionate, and lactate at 0.25, 1.0, 0.025 and 0.07 retool/L, respectively in medium. At this concentration, each acid had no growth stimulating activity on T84 cells; however, when these acids were mixed together at the above levels, it showed significantly high activity than control. Except for lactate, these acids significantly attenuated IL-6 production at just 0.1 mmol/L. In addition, under TNF-α stimulation, butyrate attenuated the production of TLR4 mRNA. The treatment with *** significantly attenuated clinical and histological scores of colitis with an increase of cecal butyrate levels, compared with the control group.CONCLUSION： *** can ameliorate experimental colonic inflammation. In part, the metabolite of ***, butyrate, increases mucosal integrity and shows anti-inflammatory action modulation of mucosal defense system via TLR4.

关键词： Intestinal Microflora, Butyrate, Eubacterium limosum Toll like receptor, IL-6

Antibody markers in the diagnosis of inflammatory boweldisease

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World Journal of Gastroenterology 2016年第3期22卷 1304-1310页

作者： keiichi mitsuyama Mikio Niwa Hidetoshi Takedatsu Hiroshi Yamasaki Kotaro Kuwaki Shinichiro Yoshioka Ryosuke Yamauchi Shuhei Fukunaga Takuji Torimura Inflammatory Bowel Disease Center Kurume University School of MedicineKurume 830-0011Japan Division of Gastroenterology Department of MedicineKurume University School of MedicineKurume 830-0011Japan Institute for Advanced Sciences Toagosei Co.Ltd.2 OhkuboTsukubaIbaraki 300-2611Japan

Inflammatory bowel disease(IBD), including Crohn's disease and ulcerative colitis, is a chronic intestinal inflammation of unknown etiology. The diagnosis of IBD is based on endoscopic, radiologic and histopathologic criteria. Recently, the search for a noninvasive marker that could augment or replace part of this diagnostic process has become a focus of IBD research. In this review, antibody markers, including microbial antibodies, autoantibodies and peptide antibodies, will be described, focusing on their common features. At present, no single marker with qualities that are satisfactory for the diagnosis and treatment of IBD has been identified, although panels of some antibodies are being evaluated with keen interest. The discovery of novel IBD-specific and sensitive markers is anticipated. Such markers could minimize the use of endoscopic and radiologic examinations and could enable clinicians to implement individualized treatment plans designed to improve the long-term prognosis of patients with IBD.

关键词： Biomarker Crohn's disease Serologicalantibody Ulcerative colitis

study to determine guidelines for pediatric colonoscopy

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World Journal of Gastroenterology 2017年第31期23卷 5773-5779页

作者： Shinichiro Yoshioka Hidetoshi Takedatsu Shuhei Fukunaga Kotaro Kuwaki Hiroshi Yamasaki RyosukeYamauchi Atsushi Mori Hiroshi Kawano Tadahiro Yanagi Tatsuki Mizuochi Kosuke Ushijima keiichi mitsuyama Osamu Tsuruta Takuji Torimura Division of Gastroenterology Department of Medicine Kurume University School of Medicine Department of Gastroenterology and Medicine Fukuoka University Faculty of Medicine Department of Pediatrics and Child Health Kurume University School of Medicine

To investigated characteristics, diagnosis, bowel-cleansing preparation, sedation, and colonoscope length and diameter in Japanese pediatric patients receiving total colonoscopy. METHODSThe present study evaluated consecutive patients aged ≤ 15 years who had undergone their first colonoscopy in Kurume University between January 2007 and February 2015. Data were retrospectively analyzed. We identified 110 pediatric patients who had undergone colonoscopy that had reached the cecum, allowing the observation of the total colon. RESULTSHematochezia, abdominal pain, and diarrhea were the most common symptoms. For bowel-cleansing preparation, pediatric patients aged ≤ 12 years were treated with magnesium citrate, and patients aged 13-15 years were treated with polyethylene glycol 4000. For sedation, thiamylal with pentazocine, which has an analgesic effect, was used in patients aged ≤ 6 years, and midazolam with pentazocine was used in patients aged ≥ 7 years. Regarding the choice of endoscope, short and thin endoscopes were selected for younger patients, particularly patients aged ≤ 3 years. Positive diagnoses were made in 78 patients (70.9%). Inflammatory bowel disease (n = 49, 44.5%), including ulcerative colitis (n = 37, 33.6%) and Crohn’s disease (n = 12, 10.9%), was the most common diagnosis. CONCLUSIONColonoscopy offers a high diagnostic capability for pediatric patients with gastrointestinal symptoms. The selection of appropriate management the performance of colonoscopy is important in pediatric patients.

关键词： Pediatric endoscopy Sedation Bowel cleansing preparation Inflammatory bowel disease Complication

Prediction of colorectal tumor grade and invasion depth through narrow-band imaging scoring

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World Journal of Gastroenterology 2018年第42期24卷 4809-4820页

作者： Yasuhiko Maeyama keiichi mitsuyama Tetsuhiro Noda Shiuchiro Nagata Tsutomu Nagata Shinichiro Yoshioka Hikaru Yoshida Michita Mukasa Hiroaki Sumie Hiroshi Kawano Jun Akiba Yuko Araki Tatsuyuki Kakuma Osamu Tsuruta Takuji Torimura Division of Gastroenterology Department of MedicineKurume University School of Medicine Department of Gastroenterology St.Mary’s HospitalKurume Department of Diagnostic Pathology Kurume University Hospital Biostatistics Center Kurume University School of Medicine

AIM To determine the usefulness of assigning narrow-band imaging(NBI) scores for predicting tumor grade and invasion depth in colorectal *** A total of 161 colorectal lesions were analyzed from138 patients who underwent endoscopic or surgical resection after conventional colonoscopy and magnifying endoscopy with NBI. The relationships between the surface and vascular patterns of the lesions, as visualized with NBI, and the tumor grade and depth of submucosa(SM) invasion were determined *** were assigned to distinct features of the surface microstructures of tubular and papillary-type *** a multivariate analysis, a model was developed for predicting the tumor grade and depth of invasion based on NBI-finding *** NBI findings that correlated with a high tumor grade were associated with the "regular/irregular"(P < 0.0001)surface patterns and the "avascular area" pattern(P =0.0600). The vascular patterns of "disrupted vessels"(P = 0.0714) and "thick vessels"(P = 0.0133) but none of the surface patterns were associated with a depth of invasion of ≥ 1000 μm. In our model, a total NBIfinding score ≥ 1 was indicative of a high tumor grade(sensitivity: 0.97; specificity: 0.24), and a total NBIfinding score ≥ 9(sensitivity: 0.56; specificity: 1.0) was predictive of a SM invasion depth ≥ 1000 μm. Scores less than these cutoff values signified adenomas and a SM invasion depth < 1000 μm, respectively. Associations were also noted between selected NBI findings and tumor tissue architecture and *** Our multivariate statistical model for predicting tumor grades and invasion depths from NBI-finding scores may help standardize the diagnosis of colorectal lesions and inform therapeutic strategies.

关键词： Colorectal cancer Magnifying narrow-band imaging Score Surface pattern Vascular pattern

Experimental and numerical study on hydrodynamics of riparian vegetation

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Journal of Hydrodynamics 2014年第5期26卷 796-806页

作者： UOTANI Takuya KANDA keiichi MICHIOKU Kohji Kobe City Bureau KobeJapan Department of Civil Engineering Akashi National College of TechnologyAkashiJapan Department of Civil and Environmental Engineering Hosei UniversityShinjukuTokyoJapan

Recently, many channelized rivers tend to be heavily vegetated due to regime shifts in hydrological, fluvial and ecological processes. Dense vegetation in a river frequently obstructs a flood flow and reduces conveyance capacity of channels. On the other hand, river vegetation provides various ecological services such as habitats for various species and life, natural cycle of organic and inorganic substances, etc.. It is of engineering importance to understand vegetation hydrodynamics in order to preserve vegetation nature and keep a certain level of flow conveyance capacity. In view that willows tend to be densely vegetated along the shoreline of floodplains or sandbars, a field measurement, a physical model experiment and a numerical analysis were carried out for investigating hydrodynamics in an open channel with riparian vegetation. Discussion was made focusing on flow and shear layer structures developed around the vegetation canopy.

关键词： open channel riparian vegetation drag force velocity profile laboratory experiment hydrodynamic model

Formation and Annealing of BaTiO_3 and SrTiO_3 Nanoparticles in KOH Solution

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Journal of Materials Science & Technology 2010年第1期26卷 33-38页

作者： Tomoki Tsumura keiichi Matsuoka Masahiro Toyoda Department of Applied Chemistry Faculty of EngineeringOita University

Barium titanate （BaTiO3） and strontium titanate （SrTiO3） nanoparticles were synthesized separately through hydrothermal reaction of crystalline TiO2 particles and corresponding alkaline earth hydroxides, Ba（OH）2 and St（OH）2 respectively, in 50 mol·dm^-3 KOH solution at 150℃. Each structural evolution of BaTiO3 and SrTiO3 during the hydrothermal treatment was investigated by X-ray diffraction （XRD）, field emission scanning electron microscopy （FE-SEM）, field emission transmission electron microscopy （FE-TEM） and thermogravimetry- differential analysis （TG-DTA）. In the BaTiO3 system, round particles with cubic perovskite-type structure were obtained within 1 h. However, these particles were gradually dissolved and then were re-precipitated in the form of cube-shape BaTiO3 particles with a smaller lattice constant ac than that of the former phase. After the BaTiO3 particles formed firstly have disappeared completely, or the two phases coexistence stage with different lattice constant ac passed, lattice constant ac of BaTiO3 phase re-precipitated continuously decreased with annealing time. In contrast, once SrTiO3 particles are formed, the lattice constant ac decreased continuously throughout the reaction. The result indicates that SrTiO3 particles were annealed without dissolution and precipitation process under the present condition.

关键词： BaTiO3 SrTiO3 Nanoparticle Hydrothermal reaction

Multi-disciplinary treatment for cholangiocellular carcinoma

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World Journal of Gastroenterology 2007年第10期13卷 1500-1504页

作者： Mitsugi Shimoda keiichi Kubota Second Department of Surgery Dokkyo Medical University School of Medicine880 Kita KobayashiMibuTochigi 321-0293Japan

Cholangiocarcinoma(CC)is rare malignant tumors composed of cells that resemble those of the biliary *** is notoriously difficult to diagnose,and is associated with a high ***,CC is divided into intrahepatic and extraheaptic disease according to its location within the biliary *** cholangiocellular carcinoma(IH-CCC)or peripheral cholangiocellular carcinoma(CCC)appears within the second bifurcation of hepatic bile duct,and is the second most common primary liver cancer following hepatocellular carcinoma(HCC),IH-CCC or peripheral CCC often presents with advanced clinical features,and the cause for this cancer rise is still ***,CT and PET provide useful diagnostic information in those *** resection is the only chance for cure,with results depending on selected patients and careful surgical *** transplantation could offer long-term survival in selected patients when combined with ***,radiation therapy or combination therapies remain as the only treatment for inoperable ***,these are uniformly ineffective in patients' survival.

关键词： Cholangiocellular carcinoma Surgical resection Liver transplantation Chemotherapy Radiation

Taming heterogeneous rhenium catalysis for the production of biomass-derived chemicals

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Chinese Chemical Letters 2020年第5期31卷 1071-1077页

作者： keiichi Tomishige Yoshinao Nakagawa Masazumi Tamura Department of Applied Chemistry School of EngineeringTohoku UniversityMiyagi 980-857Japan

Rhenium is one of important components for heterogeneous catalysts,which has been recently used for the catalytic reactions related to the production of biomass-derived chemicals such as deoxydehydration of vicinal OH groups,C-O hydrogenolysis,and hydrogenation of carboxylic acids,and so *** oxidation state of Re as a catalytic active species is strongly dependent on the catalytic *** control of the oxidation state of Re species on the catalysts is crucial on the catalyst development.

关键词： Rhenium Oxidation state Deoxydehydration Hydrogenolysis Hydrogenation

Influence of bile contamination for patients who undergo pancreaticoduodenectomy after biliary drainage

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World Journal of Gastroenterology 2019年第47期25卷 6847-6856页

作者： keiichi Okano Yasuyuki Suzuki Departments of Gastroenterological Surgery Kagawa University

BACKGROUND The influence of bile contamination on the infectious complications of patients undergoing pancreaticoduodenectomy(PD)has not been thoroughly *** To evaluate the effect of preoperative biliary drainage and bile contamination on the outcomes of patients who undergo *** The database of 4101 patients who underwent PD was *** biliary drainage was performed in 1964 patients(47.9%),and bile contamination was confirmed in 606 patients(14.8%).RESULTS The incidence of postoperative infectious complications was 37.9%in patients with preoperative biliary drainage and 42.4%in patients with biliary contamination,*** with extrahepatic bile duct carcinoma,ampulla of Vater carcinoma,and pancreatic carcinoma had a high frequency of preoperative biliary drainage(82.9%,54.6%,and 50.8%)and bile contamination(34.3%,26.2%,and 20.2%).Bile contamination was associated with postoperative pancreatic fistula(POPF)Grade B/C,wound infection,and catheter infection.A multivariate logistic regression analysis revealed that biliary contamination(odds ratio 1.33,P=0.027)was the independent risk factor for POPF Grade B/*** three most commonly cultured microorganisms from bile(Enterococcus,Klebsiella,and Enterobacter)were identical to those isolated from organ *** In patients undergoing PD,bile contamination is related to postoperative infectious complication including POPF Grade B/*** management of biliary contamination should be standardised for patients who require preoperative biliary drainage for PD,as the main microorganisms are identical in both organ spaces and bile.

关键词： Bile contamination Complication Pancreaticoduodenectomy Preoperative biliary drainage Postoperative pancreatic fistula Grade B/C