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Bleeding duodenal hemangioma: Morphological changes and endoscopic mucosal resection

World Journal of Gastroenterology 2012年第22期18卷 2872-2876页

作者： Noriko Nishiyama Hirohito Mori Hideki Kobara Shintarou Fujihara takako nomura Mitsuyoshi Kobayashi Tsutomu Masaki Department of Gastroenterology and Neurology Faculty of Medicine Kagawa Medical University

Recently, the development of endoscopic procedures has increased the availability of minimally invasive treatments; however, there have been few case reports of duodenal hemangioma treated by endoscopic mucosal resection. The present report describes a case of duodenal hemangioma that showed various endoscopic changes over time and was treated by endoscopic mucosal resection. An 80-year-old woman presented with tarry stools and a loss of appetite. An examination of her blood revealed severe anemia, and her hemoglobin level was 4.2 g/dL. An emergency upper gastrointestinal endoscopy was performed. A red, protrusive, semipedunculated tumor (approximately 20 mm in diameter) with spontaneous bleeding on its surface was found in the superior duodenal angle. Given the semipedunculated appearance of the tumor, it was suspected to be an epithelial tumor with a differential diagnosis of hyperplastic polyp. The biopsy results suggested a telangiectatic hemangioma. Because this lesion was considered to be responsible for her anemia, endoscopic mucosal resection was performed for diagnostic and treatment purposes after informed consent was obtained. A histopathological examination of the resected specimen revealed dilated and proliferated capillary lumens of various sizes, which confirmed the final diagnosis of duodenal hemangioma. Neither anemia nor tumor recurrence has been observed since the endoscopic mucosal resection (approximately 1 year). Duodenal hemangiomas can be treated endoscopically provided that sufficient consideration is given to all of the possible treatment strategies. Interestingly, duodenal hemangiomas show morphological changes that are influenced by various factors, such as mechanical stimuli.

关键词： Duodenal hemangioma Endoscopic muco-sal resection Gastrointestinal bleeding Morphologicalchanges Capillary hemangioma

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A case of plasmablastic lymphoma of the liver without human immunodeficiency virus infection

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World Journal of Gastroenterology 2013年第37期19卷 6299-6303页

作者： Joji Tani Hisaaki Miyoshi takako nomura Hirohito Yoneyama Hideki Kobara Hirohito Mori Asahiro Morishita Takashi Himoto Tsutomu Masaki Department of Gastroenterology and Neurology Kagawa University Faculty of Medicine Department of Integrated Medicine Kagawa University Faculty of Medicine

Plasmablastic lymphoma(PBL)is a very rare B-cell lymphoproliferative disorder was with an aggressive clinical behavior that recently characterized by the World Health *** PBL is most commonly observed in the oral cavity of human immunodeficiency virus(HIV)-positive patients,it can also be observed at extra-oral sites in HIV-negative ***-Barr virus(EBV)may be closely related the pathogenesis of *** shows different clinicopathological characteristics between HIV-positive and-negative ***,we report a case of PBL of the liver in a 79-yearold HIV-negative *** patient died approximately1.5 mo after examination and autopsy showed that the main lesion was a very large liver *** examination of the excised lesion showed large-cell lymphoma with plasmacytic differentiation diffusely infiltrating the liver and involving the surrounding *** neoplastic cells were diffusely positive for CD30,EBV,Bob-1,and *** autopsy findings suggested a diagnosis of *** our knowledge,the present case appears to be the first report of PBL with initial presentation of the liver in a patient without HIV infection.

关键词： Plasmablastic lymphoma Human immunodeficiency virus-negative Normal liver Pathogenesis Immunohistochemistry

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Diabetes mellitus and metformin in hepatocellular carcinoma

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World Journal of Gastroenterology 2016年第27期22卷 6100-6113页

作者： Koji Fujita Hisakazu Iwama Hisaaki Miyoshi Joji Tani Kyoko Oura Tomoko Tadokoro Teppei Sakamoto takako nomura Asahiro Morishita Hirohito Yoneyama Tsutomu Masaki Department of Gastroenterology and Neurology Faculty of Medicine Kagawa University Kagawa 760-8521 Japan Life Science Research Center Kagawa University Kagawa 760-8521 Japan

Hepatocellular carcinoma(HCC) is the leading cause of cancer-related death worldwide. Diabetes mellitus, a risk factor for cancer, is also globally endemic. The clinical link between these two diseases has been the subject of investigation for a century, and diabetes mellitus has been established as a risk factor for HCC. Accordingly, metformin, a first-line oral anti-diabetic, was first proposed as a candidate anti-cancer agent in 2005 in a cohort study in Scotland. Several subsequent large cohort studies and randomized controlled trials have not demonstrated significant efficacy for metformin in suppressing HCC incidence and mortality in diabetic patients; however, two recent randomized controlled trials have reported positive data for the tumor-preventive potential of metformin in non-diabetic subjects. The search for biological links between cancer and diabetes has revealed intracellular pathways that are shared by cancer and diabetes. The signal transduction mechanisms by which metformin suppresses carcinogenesis in cell lines or xenograft tissues and improves chemoresistance in cancer stem cells have also been elucidated. This review addresses the clinical and biological links between HCC and diabetes mellitus and the anti-cancer activity of metformin in clinical studies and basic experiments.

关键词： Hepatocellular carcinoma Diabetes mellitus Metformin Risk

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Influence of percutaneous local therapy for hepatocellular carcinoma on gastric function

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World Journal of Gastroenterology 2013年第10期19卷 1618-1624页

作者： Mitsuyoshi Kobayashi Fumihiko Kinekawa Kazuya Matsuda Shintaro Fujihara Noriko Nishiyama takako nomura Joji Tani Hisaaki Miyoshi Hideki Kobara Akihiro Deguchi Hirohito Yoneyama Hirohito Mori Tsutomu Masaki Department of Gastroenterology and Neurology Faculty of MedicineKagawa UniversityMiki-choKita-gunKagawa 761-0793Japan Department of Internal Medicine Sanuki Municipal HospitalSanuki-cityKagawa 769-2393Japan Department of Internal Medicine Matsuda ClinicTakamatsu-cityKagawa 760-0071Japan

AIM:To investigate the influence of percutaneous local therapy on gastric myoelectrical activity in patients with hepatocellular ***:Forty-four patients with hepatocellular carcinoma(HCC) [27 males and 17 females,ranging in age from 49 to 81 years old(69.7 ± 8.01 years)] who were admitted for percutaneous local therapy were enrolled in this *** examined clinical abdominal symptoms using the Gastrointestinal Symptom Rating Scale(GSRS) before and 3 d after percutaneous local *** also measured cutaneous fasting and postprandial electrogastrography(EGG) recordings before and 3 d after percutaneous local ***:We found that the percentage of normogastria in the fasting period was lower in the Child B group than in the Child A group(66.8% ± 8.6% vs 84.0% ± 3.8%).After percutaneous local therapy for HCC,the percentages of normogastria in the fasting period were significantly decreased(81.6% ± 3.5% vs 75.2% ± 4.5%).None of the postprandial EGG parameters changed significantly after percutaneous local therapy for *** local therapy for HCC reduced the power ratio(PR).In particular,the PR of tachygastria was significantly decreased after therapy(P < 0.01).However,no significant differences were found in the postprandial EGG ***,no significant differences were found in the calculated GSRS scores obtained from the questionnaire before and after ***:Gastric slow-wave dysrhythmias were induced by percutaneous local therapy in HCC patients,even though the GSRS scores obtained from the questionnaire did not change significantly.

关键词： Gastric myoelectrical activity Electrogastrography Hepatocellular carcinoma Percutaneous ethanol injection Radiofrequency ablation

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A rare case of hyaline-type Castleman disease in the liver

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World Journal of Hepatology 2013年第7期5卷 404-408页

作者： Hisaaki Miyoshi Shima Mimura takako nomura Joji Tani Asahiro Morishita Hideki Kobara Hirohito Mori Hirohito Yoneyama Akihiro Deguchi Takashi Himoto Naoki Yamamoto Keiichi Okano Yasuyuki Suzuki Tsutomu Masaki Department of Gastroenterology and Neurology Faculty of Medicine Kagawa University Department of Gastroenterological Surgery Faculty of Medicine Kagawa University

Castleman disease often develops in the neck, mediastinum and pulmonary hilum. Its onset in the peritoneal cavity is very rare. The patient, a woman in her 70s, was referred to our department for a detailed examination of an abdominal mass. On abdominal ultrasonography, computed tomography scan, magnetic resonance imaging and positron emission tomography, a mass approximately 15 mm in diameter was noted in the hepatic S6. We attempted radical treatment and conducted a laparoscope-assisted right lobectomy. On the basis of histopathological findings, the patient was diagnosed as having hyaline type Castleman disease in the liver, a very rare condition.

关键词： Castleman disease Hyaline type Liver tumor Hepatectomy Positron emission tomography

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Postoperative functional evaluation of gastrectomy for gastric cancer

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Chinese Journal of Cancer Research 2022年第6期34卷 567-574页

作者： Eiji nomura Department of Gastroenterological and General Surgery Tokai University Hachioji HospitalTokyo 192-0032Japan

To improve the quality of surgical procedures for gastric cancer,it is essential to consider many components comprehensively,including gastric motility,small intestinal absorption,hormones that affect gastric motility and appetite,presence or absence of vagus nerve preservation,esophageal regurgitation on endoscopic findings,in addition to whether or not there is a physiological route for food passage through the ***,proper functional evaluation cannot be performed without considering the form and amount of energy in the nutritional supplement to be loaded,and the posture at the time of *** results of functional evaluation vary according to the method selected from many available options,but we believe that use of the most physiologically accurate,appropriate and selectable option will enable us to arrive at the best resection/reconstruction *** have reported that it is important to consider the preservation of three elements when performing gastrectomy:1)reduction of the extent of gastrectomy,2)preservation of the pylorus,and 3)preservation of the vagus nerve;among which preservation of the remnant stomach is the most ***,the selection of a reconstruction method that maintains secretion of hormones beneficial to gastric motility preserves the energy balance inherent in the human body,and also provides better quality of life.

关键词： Gastric cancer gastrectomy functional evaluation

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(Arylimido)vanadium(V)-Alkylidene Complexes as Catalysts for Ring-opening Metathesis Polymerization(ROMP) of Cyclic Olefins: Ligand Design for Exhibiting the High Activity

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Chinese Journal of Polymer Science 2019年第10期37卷 943-950,I0002页

作者： Kotohiro nomura Sapanna Chaimongkolkunasin Department of Chemistry Graduate School of Science Tokyo Metropolitan University

(Imido)vanadium(V)-alkylidene complexes of type V(CHSiMe3)(NR)(OR?)(PMe3)2 [R = Ad, C6H5, 2,6-Me2C6H3, 2,6-Cl2C6H3;R?= 2,6-Me2C6H3, 2,6-i Pr2C6H3, 2,6-F2C6H3, C6F5, C6Cl5] exhibited from moderate to remarkable catalytic activities for ringopening metathesis polymerization(ROMP) of norbornene(NBE). The catalytic activities were affected by the ligand substituents, and V(CHSiMe3)(N-2,6-Cl2C6H3)(OC6X5)(PMe3)2(X = F, Cl) demonstrated the exceptionally high catalytic activities for ROMP of *** complexes polymerized cycloheptene(CHPE) and cis-cyclooctene(COE), and ROMP of COE by the OC6 Cl5 analogue proceeded in a living manner even at 80℃, and the activity increased with increasing the temperature up to 120 ℃. Highly active catalysts for ROMP of cyclic olefins(NBE, cyclopentene, and CHPE) can be generated in situ by premixing isolated V(CHSiMe3)(NC6F5)(O-2,6-iPr2C6H3)(PMe3)2 with 1.0 equiv. of C6F5OH or C6Cl5OH via immediate phenoxy exchange;the activity was affected by the kind of phenol added [TOF in the ROMPs of NBE: 4.62 × 10^4 min^–1(upon addition of C6F5OH) versus 37.3 min^–1(none)].

关键词： Olefin metathesis Molecular catalyst Ring-opening metathesis polymerization Cyclic olefin Vanadium catalyst

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NONBRIDGED HALF-TITANOCENES CONTAINING ANIONIC ANCILLARY DONOR LIGANDS:PROMISING NEW CATALYSTS FOR PRECISE SYNTHESIS OF CYCLIC OLEFIN COPOLYMERS(COCs)

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Chinese Journal of Polymer Science 2008年第5期26卷 513-523页

作者： Kotohiro nomura Graduate School of Materials Science Nara Institute of Science and Technology(NAIST)Japan

Precise,efficient copolymerizations of ethylene with cyclic olefins[norbornene(NBE),cyclopentene(CPE)]using nonbridged half-titanocenes of type,Cp TiCl_2(L)(Cp =cyclopentadienyl group,L=aryloxo,ketimide)-MAO catalyst systems have been ***_2(N=C Bu_2)exhibited both remarkable catalytic activity and efficient NBE incorporation for ethylene/NBE copolymerization:the NBE incorporation by Cp TiCl_2(X)(X=N=C Bu_2,O-2,6- Pr_2C_6H_3; Cp =Cp,C_5Me_5,indenyl)was related to the calculated coordination ene...

关键词： Titanium Cyclic olefin copolymers Copolymerization Ethylene Homogeneous catalysts

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Linear seesaw model with a modular S_(4)flavor symmetry

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Chinese Physics C 2022年第5期46卷 11-19页

作者： Takaaki nomura Hiroshi Okada College of Physics Sichuan UniversityChengdu 610065China Asia Pacific Center for Theoretical Physics(APCTP)-Headquarters San 31 Hyoja-dongNam-guPohang 790-784Korea Department of Physics Pohang University of Science and TechnologyPohang 37673Korea

We discuss a linear seesaw model with a field content as minimum as possible,introducing a modular S_(4)using gauged U(1)_(B−L) *** to the rank two neutrino mass matrix,we obtain a vanishing neutrino mass eigenvalue,and only the normal mass hierarchy of neutrinos is favored via the modular S_(4)*** our numericalΔχ^(2)analysis,we especially determine a relatively sharp prediction on the sum of neutrino masses to be approximately 60 meV,in addition to other predictions.

关键词： neutrino mass linear seesaw mechanism modular S_(4)flavor symmetry

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Calcium Signaling in Plant Endosymbiotic Organelles： Mechanism and Role in Physiology

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Molecular Plant 2014年第7期7卷 1094-1104页

作者： Hironari nomura Takashi Shiinab Department of Health and Nutrition Gifu Women's University 80 Taromaru Gifu 501-2592 Japan Graduate School of Life and Environmental Sciences Kyoto Prefectural University Sakyo-ku Kyoto 606-8522 Japan

Recent studies have demonstrated that chloroplasts and mitochondria evoke specific Ca2＋ signals in response to biotic and abiotic stresses in a stress-dependent manner. The identification of Ca2＋ transporters and Ca2＋signaling mol- ecules in chloroplasts and mitochondria implies that they play roles in controlling not only intra-organellar functions, but also extra-organellar processes such as plant immunity and stress responses. It appears that organellar Ca2＋ signaling might be more important to plant cell functions than previously thought. This review briefly summarizes what is known about the molecular basis of Ca2＋ signaling in plant mitochondria and chloroplasts.

关键词： biotic stress abiotic stress calcium signaling calcium transport CAS chloroplast mitochondria.

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