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Fulminant amebic colitis in a patient with concomitant cytomegalovirus infection after systemic steroid therapy:A case report

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World Journal of Clinical Cases 2021年第15期9卷 3726-3732页

作者： Naoki Shijubou Toshiyuki Sumi Koki Kamada Takeyuki Sawai yuichi yamada Tatsuru Ikeda HisashiNakata Yuji Mori Hirofumi Chiba Department of Respiratory Medicine Hakodate Goryoukaku HospitalHakodate 040-8611Japan Department of Respiratory Medicine and Allergology Sapporo Medical University School of MedicineSapporo 060-8556Japan Department of Pathology and Diagnosis Hakodate Goryoukaku HospitalHakodate 040-8611Japan

BACKGROUND Amebic colitis is an infection caused by Entamoeba histolytica and most commonly observed in regions with poor *** is also seen as a sexually transmitted disease in developed *** amebic colitis usually has a chronic course with repeated exacerbations and remissions,it may also manifest as a fulminant form that rapidly progresses and leads to severe,life-threatening complications,such as intestinal perforation,peritonitis,and sepsis,that have a high mortality *** SUMMARY A 68-year-old man was admitted to our hospital with chest pain and acute *** was diagnosed with acute coronary syndrome,acute heart failure,and bacterial *** respiratory condition worsened despite receiving intensive care and intravenous *** the fifth day of hospitalization,he was diagnosed with acute respiratory distress syndrome and was started on steroid *** subsequently developed bloody stools and was diagnosed with cytomegalovirus(CMV)enterocolitis based on biopsy results and a peripheral blood CMV pp65 antigenemia test *** we started antiviral therapy with ganciclovir,which was successful in reducing his antigen titers,he continued to have bloody *** weeks after initiation of ganciclovir therapy and six weeks after his admission,the patient died from intestinal *** only posthumously diagnosed him with amebic colitis and CMV enterocolitis based on autopsy findings of transmural necrosis of the entire colon with massive ameba *** We urge clinicians to consider Entamoeba histolytica infection if severe colitis progresses after steroid *** treatment is recommended then.

关键词： Amebiasis Intestinal Colitis Cytomegalovirus Glucocorticoids Perforation Case report

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Experimental verification of the effect of cumulative chromatic dispersion on the transmission performance of long-haul WDM system

Experimental verification of the effect of cumulative chroma...

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亚太地区通信会议暨光电子通信会议

作者： yuichi yamada Hidenori Taga Koji Goto KDD Submarine Cable Systems 2-3-2 Nishi-shinjuku shinjuku-ku Tokyo 163-03 Japan KDD Submarine Cable Systems 2-3-2 Nishi-shinjuku shinjuku-ku Tokyo 163-03 Japan KDD Submarine Cable Systems 2-3-2 Nishi-shinjuku shinjuku-ku Tokyo 163-03 Japan

Degradation of the transmission performance dueto the accumulated chromatic dispersion in thelong-haul WDM system is experimentally *** was 0.4dB/(1000ps/nm) at the most for 6500kmtransmission.

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MK-0626,a selective DPP-4 inhibitor,attenuates hepatic steatosis in ob/ob mice

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World Journal of Gastroenterology 2014年第43期20卷 16227-16235页

作者： Tatsuya Ohyama Ken Sato yuichi Yamazaki Hiroaki Hashizume Norio Horiguchi Satoru Kakizaki Masatomo Mori Motoyasu Kusano Masanobu yamada Department of Medicine and Molecular Science Gunma University Graduate School of MedicineGunma 371-8511Japan Department of Endoscopy and Endoscopic Surgery Gunma University HospitalGunma 371-8511Japan

AIM: To investigate the mechanism and in vivo effects of MK-0626, a dipeptidyl peptidase-4 inhibitor, on hepatic steatosis using ob/ob mice.

关键词： Dipeptidyl peptidase-4 inhibitor Hepatic steatosis ob/ob mice AMP-activated protein kinase Microsomal triglyceride transfer protein Adiponectin

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Combination therapy with daclatasvir and asunaprevir for dialysis patients infected with hepatitis C virus

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World Journal of Clinical Cases 2016年第3期4卷 88-93页

作者： Ken Sato yuichi Yamazaki Tatsuya Ohyama Takeshi Kobayashi Norio Horiguchi Satoru Kakizaki Motoyasu Kusano Masanobu yamada Department of Medicine and Molecular Science Gunma University Graduate School of Medicine Department of Gastroenterology Heisei Hidaka Clinic Department of Endoscopy and Endoscopic Surgery Gunma University Hospital

The standard antiviral therapy for dialysis patients infected with hepatitis C virus(HCV) is(pegylated) interferon monotherapy, but its efficacy is insufficient. Oral direct-acting antiviral agents(DAAs) have recently been developed for chronic hepatitis C patients. However, some DAAs have contraindications for chronic renal failure(CRF). Daclatasvir and asunaprevir are metabolized largely in the liver and are not contraindicated in CRF. Combination therapy with daclatasvir and asunaprevir was used for 4 dialysis patients infected with genotype 1b HCV. One patient had viral breakthrough, and the 3 others had sustained virological response 12. One patient was admitted for heart failure and percutaneous coronary intervention due to concomitant ischemic disease. Heart failure was unlikely to be caused by the combination therapy, as it was probably due to water overload. The patient continued to receive the combination therapy after the remission of the heart failure. The combination therapy was well tolerated in the other patients.

关键词： Hepatitis C Oral drug Daclatasvir Asunaprevir Dialysis

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Transient Receptor Potential Ankyrin 1 Ion Channel Facilitates Acute Inflammation Induced by Surgical Incision in Mice

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Open Journal of Anesthesiology 2017年第5期7卷 134-145页

作者： Maiko Hasegawa-Moriyama Keika Mukaihara Tomotsugu yamada Tomoyuki Kuwaki yuichi Kanmura Department of Anesthesiology and Critical Care Medicine Graduate School of Medical and Dental Sciences Kagoshima University Kagoshima Japan Department of Physiology Graduate School of Medical and Dental Sciences Kagoshima University Kagoshima Japan

Background: Transient receptor potential ankyrin (TRPA) 1 is known as a peripheral initiator of acute inflammation and hyperalgesia. However, its role in the facilitation of innate immune responses followed by resolution of the inflammation triggered by a surgical incision has not been fully investigated. Therefore, we evaluated the mechanism by which TRPA1 regulates the inflammatory responses mainly facilitated by neutrophils and macrophages in the early course of wound repair after an incision. Methods: Plantar incision was performed in wild-type and TRPA1-/- mice. The infiltration of polymorphonuclear neutrophils, macrophage phenotype, and induction of inflammatory mediators were assessed for 7 days postoperatively. Results: TRPA1-/-?mice exhibited decreased infiltration of polymorphonuclear neutrophilscompared with wild-type mice on day 1. Consistently, the influx of F4/80+ iNOS+ proinflammatory M1 macrophages to incised sites was markedly decreased on day 2. Similarly, F4/80+ CD206+M2 macrophages, which regulate the resolution of inflammation and promote wound healing in the later phase of acute inflammation, were significantly decreased in TRPA1-/- compared with those in wild-type mice on day 7. In addition, the induction of heme oxygenase-1, which promotes wound healing by switching phenotype of macrophages, was decreased in the early phase of acute inflammation, whereas the expression of proinflammatory mediators such as tumor necrosis factor and cyclooxygenase-2, and 15-lipoxygenase, which are involved in the resolution of inflammation was increased in the late phase in TRPA1-/- mice. Conclusions: Early innate immune responses including neutrophil infiltration and macrophage polarization at incised sites were inhibited in TRPA1-/- mice, associated with increased pro-inflammatory mediators in later phase. Peripheral TRPA1 may facilitate the acute inflammatory process, leading to the promotion of macrophage-mediated resolution of inflammation and wound repair

关键词： Transient Receptor Potential Ankyrin 1 Surgical Incision Macrophage Inflammation

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Effects of Glucose Load on Catabolism during Propofol-Based Anesthesia with Remifentanil in Patients with Diabetes Mellitus: A Prospective Randomized Trial

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Open Journal of Anesthesiology 2015年第9期5卷 197-205页

作者： Tomotsugu yamada Maiko Hasegawa-Moriyama Mayumi Nakahara Akira Matsunaga yuichi Kanmura Department of Anesthesiology and Critical Care Medicine Graduate School of Medical and Dental Sciences Kagoshima University Kagoshima Japan

Background: Perioperative exacerbation of hyperglycemia and insulin resistance is associated with increased complications in patients with diabetes mellitus. We recently reported that glucose load during anesthesia with sevoflurane suppressed lipid catabolism in diabetic patients. In contrast to inhaled anesthetics, propofol solution contains triglycerides, which can be an energy source during surgery. However, the clinical relevance of glucose load under propofol-based anesthesia in diabetic patients is unknown. Therefore, we investigated the effect of intraoperative glucose load on catabolism during propofol-based anesthesia in patients with diabetes mellitus. Methods: Twenty-three patients with diabetes mellitus undergoing elective surgery with propofol-remifentanil-based anesthesia were randomly assigned to receive a glucose load (1.5 mg/kg/ min) or not. Plasma levels of glucose, insulin, cortisol, catecholamines, acetoacetic acid, free fatty acids, ketone bodies, 3-hydroxybutyric acid, and 3-methylhistidine/creatinine, used as a marker for protein catabolism, were measured at the start of surgery and 3 h later. Results: Glucose and insulin levels were significantly higher in patients who received a glucose load than in those who did not. Nonetheless, the levels of cortisol and catecholamines were unchanged during surgery. Similarly, the difference in the levels of markers for lipid as well as protein catabolism was not significant between the groups at 3 h after the start of surgery. Conclusions: Changes in lipid as well as protein catabolism were not altered by glucose load in diabetic patients under propofol-based anesthesia with remifentanil. Our study suggested that continuous infusion of propofol at a clinical dose is sufficient to reduce the requirement for glucose infusion during surgery in patients with diabetes.

关键词： Diabetes Propofol Glucose Infusion Catabolism

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Non-invasive prediction of non-alcoholic steatohepatitis in Japanese patients with morbid obesity by artificial intelligence using rule extraction technology

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World Journal of Hepatology 2018年第12期10卷 934-943页

作者： Daisuke Uehara Yoichi Hayashi Yosuke Seki Satoru Kakizaki Norio Horiguchi Hiroki Tojima yuichi Yamazaki Ken Sato Kazuki Yasuda Masanobu yamada Toshio Uraoka Kazunori Kasama Department of Medicine and Molecular Science Gunma University Graduate School of Medicine Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Department of Computer Science Meiji University Tama-ku Weight Loss and Metabolic Surgery Center Yotsuya Medical Cube Department of Metabolic Disorder Diabetes Research Center Research Institute National Center for Global Health and Medicine Department of Internal Medicine Division of Endocrinology and Metabolism Gunma University Graduate School of Medicine

AIM To construct a non-invasive prediction algorithm for predicting non-alcoholic steatohepatitis(NASH), we investigated Japanese morbidly obese patients using artificial intelligence with rule extraction *** Consecutive patients who required bariatric surgery underwent a liver biopsy during the operation. Standard clinical, anthropometric, biochemical measurements were used as parameters to predict NASH and were analyzed using rule extraction technology. One hundred and two patients, including 79 NASH and 23 non-NASH patients were analyzed in order to create the predictionmodel, another cohort with 77 patients including 65 NASH and 12 non-NASH patients were analyzed to validate the *** Alanine aminotransferase, C-reactive protein, homeostasis model assessment insulin resistance, albumin were extracted as predictors of NASH using a recursive-rule extraction algorithm. When we adopted the extracted rules for the validation cohort using a highly accurate rule extraction algorithm, the predictive accuracy was 79.2%. The positive predictive value, negative predictive value,sensitivity and specificity were 88.9%, 35.7%, 86.2% and 41.7%, *** We successfully generated a useful model for predicting NASH in Japanese morbidly obese patients based on their biochemical profile using a rule extraction algorithm.

关键词： Non-alcoholic steatohepatitis Artificial intelligence Rule extraction Morbid obesity Liver biopsy Non-invasive prediction

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Image-based autonomous navigation of Hayabusa2 using artificial landmarks: The design and brief in-flight results of the first landing on asteroid Ryugu

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Astrodynamics 2020年第2期4卷 89-103页

作者： Naoko Ogawa Fuyuto Terui Yuya Mimasu Kent Yoshikawa Go Ono Seiji Yasuda Kota Matsushima Tetsuya Masuda Hiroki Hihara Junpei Sano Takashi Matsuhisa Satoshi Danno Manabu yamada Yasuhiro Yokota Yuto Takei Takanao Saiki yuichi Tsuda Japan Aerospace Exploration Agency Sagamihara252-5210Japan NEC Corporation Fuchu183-8501Japan NEC Space Technologies Ltd.Fuchu183-8551Japan Systems Engineering Consultants Co. Ltd.Tokyo158-0097Japan Planetary Exploration Research Center Chiba Institute of TechnologyNarashino275-0016Japan

Hayabusa2 is an asteroid sample return mission carried out by the Japan Aerospace Exploration *** spacecraft was launched in 2014 and arrived at the target asteroid Ryugu on June 27,*** the 1.5-year proximity phase,several critical operations(including two landing/sampling operations)were successfully *** were based on autonomous image-based descent and landing *** paper describes an imagebased autonomous navigation scheme of the Hayabusa2 mission using artificial landmarks named target markers(TMs).Its basic algorithm,and the in-flight results of the first touchdown and its rehearsal,are shown.

关键词： Hayabusa2 Ryugu image-based navigation target marker tracking

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The deep-space multi-object orbit determination system and its application to Hayabusa2’s asteroid proximity operations

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Astrodynamics 2020年第4期4卷 377-392页

作者： Hiroshi Takeuchi Kent Yoshikawa Yuto Takei Yusuke Oki Shota Kikuchi Hitoshi Ikeda Stefania Soldini Naoko Ogawa Yuya Mimasu Go Ono Fuyuto Terui Naoya Sakatani Manabu yamada Toru Kouyama Shingo Kameda Takanao Saiki yuichi Tsuda Institute of Space and A stronautical Science Japan A erospace Exploration AgencySagamihara 252-5210Japan The Graduate University for Aduanced Studies Hayama 240-0193Japan Research and Development Directorate Japan Aerospace Exploration AgencySagamihara 252-5210Japan University of Liverpool Liverpool L693BXUK Chiba Institute of Technology Narashino 275-0016Japan National Institute of Aduanced Industrial Science and Technology Koto-ku 135-0064Japan Rikkyo University Toshima-ku 171-8501Japan

The deep-space multi-object orbit determination system(DMOODS)and its application in the asteroid proximity operation of the Hayabusa2 mission are *** was developed by the Japan Aerospace Exploration Agency(JAXA)for the primary purpose of determining the trajectory of deep-space spacecraft for JAXA’s planetary *** weighted least-squares batch filter is used for the orbit estimator of *** orbit estimator supports more than 10 data types,some of which are used for relative trajectory measurements between multiple space objects including natural satellites and small *** system consists of a set of computer programs running on Linux-based consumer PCs on the ground,which are used for orbit determination and the generation of radiometric tracking data,such as delta differential one-way ranging and doppler tracking *** the asteroid proximity phase of Hayabusa2,this system played an essential role in operations that had very strict navigation requirements or operations in which few optical data were obtained owing to special constraints on the spacecraft attitude or distance from the *** example is orbit determination during the solar conjunction phase,in which the navigation accuracy is degraded by the effect of the solar *** large range bias caused by the solar corona was accurately estimated with DMOODS by combining light detection and ranging(LIDAR)and ranging measurements in the superior solar conjunction phase of *** the orbiting operations of target markers and the MINERVA-II2 rover,the simultaneous estimation of six trajectories of four artificial objects and a natural object was made by *** type of simultaneous orbit determination of multi-artificial objects in deep-space has never been accomplished before.

关键词： orbit determination optical navigation gravity measurements superior solar conjunction delta differential one-way ranging(delta-DOR)

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Ipragliflozin-induced improvement of liver steatosis in obese mice may involve sirtuin signaling

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World Journal of Hepatology 2020年第7期12卷 350-362页

作者： Takayoshi Suga Ken Sato Tatsuya Ohyama Sho Matsui Takeshi Kobayashi Hiroki Tojima Norio Horiguchi yuichi Yamazaki Satoru Kakizaki Ayaka Nishikido Takashi Okamura Masanobu yamada TadahiroKitamura Toshio Uraoka Department of Gastroenterology and Hepatology Gunma University Graduate School of MedicineMaebashi 371-8511GunmaJapan Metabolic Signal Research Center Institute for Molecular and Cellular RegulationGunma UniversityMaebashi 371-8512GunmaJapan Department of Medicine and Molecular Science Gunma Graduate School of MedicineMaebashi 371-8511GunmaJapan

BACKGROUND Sodium glucose cotransporter 2(SGLT2)inhibitors are newly developed oral antidiabetic ***2 is primarily expressed in the kidneys and reabsorbs approximately 90%of the glucose filtered by the renal ***2 inhibitors lower glucose levels independently of insulin action by facilitating urinary glucose *** SGLT2 inhibitor ipragliflozin has reportedly improved liver steatosis in animal models and clinical ***,the mechanisms by which SGLT2 inhibitors improve liver steatosis are not fully *** To investigate the ameliorative effects of ipragliflozin on liver steatosis and the mechanisms of these effects in obese *** We analyzed 8-wk-old male obese(ob/ob)mice that were randomly divided into a group receiving a normal chow diet and a group receiving a normal chow diet supplemented with ipragliflozin(3 mg/kg or 10 mg/kg)for 4 *** also analyzed their lean sex-matched littermates receiving a normal chow diet as another control group. Body weight and liver weight were evaluated, and liverhistology, immunoblotting, and reverse transcription-polymerase chain reactionanalyses were *** lipid accumulation was significantly ameliorated in ob/ob mice treatedwith 10 mg/kg ipragliflozin compared to untreated ob/ob mice irrespective ofbody weight changes. Ipragliflozin had no appreciable effects on hepatic oxidativestress-related gene expression levels or macrophage infiltration, but significantlyreduced hepatic interleukin-1β (IL-1β) mRNA expression levels. Ipragliflozinincreased both the mRNA and protein expression levels of sirtuin 1 (SIRT1) in theliver. The hepatic mRNA levels of peroxisome proliferator-activated receptor γcoactivator 1α (PGC-1α), peroxisome proliferator-activated receptor α (PPARα),and fibroblast growth factor-21 (FGF21) were also significantly higher inipragliflozin-treated ob/ob mice than in untreated ob/ob *** study suggests that the liver steatosis-ameliorati

关键词： Selective sodium glucose cotransporter 2 Nonalcoholic fatty liver disease Sirtuin 1 Peroxisome proliferator-activated receptorγcoactivator 1α Peroxisome proliferator-activated receptorα Fibroblast growth factor-21

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