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World Journal of Gastroenterology 2014年第10期20卷 2606-2612页

作者： Satoshi Yamagiwa Hiroteru Kamimura masaaki takamura Yutaka Aoyagi Division of Gastroenterology and Hepatology Niigata University Graduate School of Medical and Dental Sciences Niigata 951-8510 Japan

Primary biliary cirrhosis(PBC)is a chronic progressive cholestatic liver disease characterized by immunemediated destruction of the small-and medium-sized intrahepatic bile ducts and the presence of antimitochondrial antibodies(AMA)in the *** are detected in over 90%of patients with PBC,whereas their prevalence in the general population is extremely low,varying from 0.16%to 1%.Previous studies have shown that the unique characteristics of biliary epithelial cells undergoing apoptosis may result in a highly direct and very specific immune response to mitochondrial ***,recent studies have demonstrated that serum from AMA-positive PBC patients is reactive with a number of xenobiotic modified E2 subunits of the pyruvate dehydrogenase complex,which is not observed in the serum of normal *** findings indicate that chemicals originating from the environment may be associated with a breakdown in the tolerance to mitochondrial *** it is currently generally accepted that AMA are the most specific serological markers of PBC,more than 60 au-toantibodies have been investigated in patients with PBC,and some have previously been considered specific to other autoimmune *** review covers the recent progress in research on the pathogenetic and clinical significance of important autoantibodies in *** the pathogenic role of those autoantibodies in PBC remains a priority of basic and clinical research.

关键词： Primary biliary cirrhosis Autoantibodies Anti-mitochondrial antibodies Anticentromere antibodies Anti-gp210 antibodies

Considerations of elderly factors to manage the complication of liver cirrhosis in elderly patients

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World Journal of Gastroenterology 2019年第15期25卷 1817-1827页

作者： Kenya Kamimura Akira Sakamaki Hiroteru Kamimura Toru Setsu Takeshi Yokoo masaaki takamura Shuji Terai Division of Gastroenterology and Hepatology Graduate School of Medical and Dental Sciences Niigata University

The aging of the organ function causes sensitivity to the disease progression and need careful consideration for the medical treatment. With the increase of aging population, the opportunity to provide medical treatment for people in very old age is rapidly increasing therefore, the understanding of the various physiological changes of cellular function, size and function of organs are essential for the decision of therapeutic options. Among the various chronic conditions seen in elderly people, we have focused on liver cirrhosis, since despite specific therapeutic options for many of liver diseases including direct acting antivirals for hepatitis C virus, nucleoside analogs for hepatitis B, and corticosteroids for autoimmune hepatitis, there is currently no standard therapy to treat liver cirrhosis, which is the final stage of these liver diseases. Therefore,management of the various symptoms of liver cirrhosis is essential, and agingrelated parameters must be considered in the decision making for therapeutic strategies and dosage of the available medicine. In this mini-review, we have summarized the therapeutic options to manage various symptoms of liver cirrhosis, carefully considering the physiological changes of various organs associated with aging.

关键词： Liver cirrhosis Elderly patients Quality of life Aging

Spontaneous regression of hepatocellular carcinoma: A mini-review

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World Journal of Gastroenterology 2017年第21期23卷 3797-3804页

作者： Akira Sakamaki Kenya Kamimura Satoshi Abe Atsunori Tsuchiya masaaki takamura Hirokazu Kawai Satoshi Yamagiwa Shuji Terai Division of Gastroenterology and Hepatology Graduate School of Medical and Dental Sciences Niigata University

Spontaneous tumor regression is an extremely rare phenomenon in the oncology field. However, there are several case reports resulted in the regression of hepatocellular carcinoma(HCC) and the accumulation of clinical information and analyses of the mechanism can contribute to the development of a novel therapy. For this purpose, we have carefully reviewed 23 cases of spontaneously regressed HCC published in recent 5 years and our case. The information regarding the tumor size, tumor marker, treatments, etc., have been summarized. The mechanism of spontaneous regression has been discussed to date and presumed to be due to many factors, including hypoxia and immunological reactions. In this careful review of the 24 cases based on the clinical information, hypoxia, systemic inflammation, and both upon spontaneous regression were seen in 3, 8, and 4 cases, respectively amo ng t he 15 c as e s f or w hic h t he inf o r mat io n regarding the proposed mechanisms are available. Recent development of immunotherapeutic approaches in oncology shows promising results, therefore, accumulation of additional cases and analysis of mechanisms underlying the spontaneous regression of HCC are essential and could lead to the development of a new generation of immunotherapies including antibodies directed against immune reactions.

关键词： Spontaneous regression Hepatocellular carcinoma Immunological reaction Immunotherapy Hypoxia

Shear wave velocity is a useful marker for managing nonalcoholic steatohepatitis

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World Journal of Gastroenterology 2010年第23期16卷 2918-2925页

作者： Akihiko Osaki Tomoyuki Kubota Takeshi Suda Masato Igarashi Keisuke Nagasaki Atsunori Tsuchiya Masahiko Yano Yasushi Tamura masaaki takamura Hirokazu Kawai Satoshi Yamagiwa Toru Kikuchi Minoru Nomoto Yutaka Aoyagi Department of Gastroenterology and Hepatology Graduate School of Medical and Dental SciencesNiigata University Department of Homeostatic Regulation and Development Graduate School of Medical and Dental SciencesNiigata University Department of Laboratory Medicine Niigata University Medical and Dental Hospital

AIM:To investigate whether a noninvasive measurement of tissue strain has a potential usefulness for management of nonalcoholic steatohepatitis(NASH).METHODS:In total 26 patients,23 NASHs and 3 normal controls were enrolled in this *** was staged based on Brunt *** a region of interest(ROI),a shear wave was evoked by implementing an acoustic radiation force impulse(ARFI),and the propagation velocity was quantif ***:Shear wave velocity(SWV) could be reproducibly quantified at all ROIs in all subjects except for 4 NASH cases,in which a reliable SWV value was not calculated at several *** average SWV of 1.34 ± 0.26 m/s in fibrous stage 0-1 was significantly slower than 2.20 ± 0.74 m/s and 2.90 ± 1.01 m/s in stages 3 and 4,respectively,but was not significantly different from 1.79 ± 0.78 m/s in stage *** a cutoff value was set at 1.47 m/s,receiver operating characteristic analysis showed significance to dissociate stages 3 and 4 from stage 0-1(P=0.0092) with sensitivity,specificity and area under curve of 100%,75% and 94.2%,*** addition,the correlation between SWV and hyaluronic acid was significant(P<0.0001),while a tendency toward negative correlation was observed with serum albumin(P=0.053).CONCLUSION:The clinical implementation of ARFI provides noninvasive repeated evaluations of liver stiffness at an arbitrary position,which has the potential to shed new light on NASH management.

关键词： Nonalcoholic steatohepatitis Ultrasound Liver stiffness measurement Shear wave velocity Acoustic radiation force impulse

Rational arrangement of measuring shear wave speed in the liver

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World Journal of Gastroenterology 2019年第20期25卷 2503-2513页

作者： Takeshi Yokoo Tsutomu Kanefuji Takeshi Suda Itsuo Nagayama Takahiro Hoshi Satoshi Abe Shinichi Morita Hiroteru Kamimura Kenya Kamimura Atsunori Tsuchiya masaaki takamura Kazuyoshi Yagi Shuji Terai Department of Preemptive Medicine for Digestive Diseases and Healthy Active Life Niigata University School of MedicineNiigataNiigata 951-8122Japan Division of Gastroenterology and Hepatology Niigata Tokamachi HospitalTokamachiNiigata 948-0065Japan Department of Gastroenterology and Hepatology Uonuma Institute of Community MedicineNiigata University Medical and Dental HospitalMinami UonumaNiigata 949-7302Japan Division of Gastroenterology and Hepatology Graduate School of Medical and Dental SciencesNiigata UniversityNiigata 951-8122Japan

BACKGROUND Shear wave speed has been widely applied to quantify a degree of liver fibrosis. However, there is no standardized procedure, which makes it difficult to utilize the speed universally. AIM To provide procedural standardization of shear wave speed measurement. METHODS Point shear wave elastography (pSWE) was measured in 781 patients, and twodimensional shear wave elastography (2dSWE) was measured on the same day in 18 cases. Regions-of-interest were placed at 12 sites, and the median and robust coefficient-of-variation (CVR) were calculated. A residual sum-of-square (Σdi2) was computed for bootstrap values of 1000 iterations in 18 cases with each assumption of 1 to 12 measurements. The proportion of the Σdi2 (%Σdi2) was calculated as the ratio of Σdi2 to pSWE after converting it based on the correlation between pSWE and 2dSWE. RESULTS The CVR showed a significantly broader distribution in the left lobe (P < 0.0001),and the smallest CVR in the right anterior segment that covered 95% cases was 40.4%. pSWE was significantly higher in the left lobe than in the right lobe (1.63 ± 0.78 m/s vs 1.61 ± 0.78 m/s, P = 0.0004), and the difference between the lobes became further discrete when the subjects were limited to the cases with a CVR less than 40.4% in any segment (1.76 ± 0.80 m/s vs 1.70 ± 0.82 m/s, P < 0.0001). The highest values of the CVR in every 0.1 m/s interval were plotted in convex upward along pSWE and peaked at 1.93 m/s. pSWE and 2dSWE were significantly correlated (P < 0.0001, r = 0.95). In 216000 resamples from 18 cases, the %Σdi2 of 12 sites was 8.0% and gradually increased as the acquisition sites decreased to reach a significant difference with a %Σdi2 of 7 sites (P = 0.027). CONCLUSION These data suggest that shear wave speed should be measured at 8 or more sites of spreading in both lobes.

关键词： Liver stiffness Ultrasound Shear wave elastography Acoustic radiation force impulse Heterogeneity

Multicentric occurrence of hepatocellular carcinoma with nonalcoholic steatohepatitis

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World Journal of Hepatology 2011年第1期3卷 15-23页

作者： Hirokazu Kawai Minoru Nomoto Takeshi Suda Kenya Kamimura Atsunori Tsuchiya Yasushi Tamura Masahiko Yano masaaki takamura Masato Igarashi Toshifumi Wakai Satoshi Yamagiwa Yasunobu Matsuda Shogo Ohkoshi Isao Kurosaki Yoshio Shirai Masahiko Okada Yutaka Aoyagi Department of Clinical Laboratory Niigata University Medical and Dental Hospital Division of Gastroenterology and Hepatology Niigata University Graduate School of Medical and Dental Sciences Division of Digestive and General Surgery Niigata University Graduate School of Medical and Dental Sciences Department of Medical Technology Niigata University Graduate School of Health Sciences Division of Preventive Medicine Niigata University Graduate School of Medical and Dental Sciences

AIM:To reveal the manner of hepatocellular carcinoma (HCC) development in patients with nonalcoholic steatohepatitis(NASH) focusing on multicentric occurrence (MO) of ***:We compared clinicopathological characteristics between patients with and without MO of HCC arising from NASH *** clinical features were implicated with reference to the literature ***:MO of HCC was identified with histological proof in 4 out of 12 patients with NASH-related HCC(2 males and 2 females).One patient had synchronous MO;an advanced HCC,two well-differentiated HCCs and a dysplastic nodule,followed by the development of metachronous MO of *** other three patients had multiple advanced HCCs accompanied by a well-differentiated HCC or a dysplastic *** these three patients,one had synchronous MO,one had metachronous MO and the other had both synchronous and metachronous *** were no obvious differences between the patients with or without MO in terms of liver function tests,tumor markers and anatomical extent of *** the other hand,all four patients with MO of HCC were older than 70 years old and had the comorbidities of obesity,type 2 diabetes mellitus(T2DM),hypertension and *** these conditions were not limited to MO of HCC,all the conditions were met in only one of eight patients without MO of ***,concurrence of these conditions may be a predisposing situation to synchronous MO of *** particular,old age,T2DM and cirrhosis were suggested to be prerequisite for MO because these factors were depicted in common among two other cases with MO of HCC under NASH in the ***:The putative predisposing factors and necessary preconditions for synchronous MO of HCC in NASH were suggested in this *** investigations are required to clarify the accurate prevalence and predictors of MO to establish better strategies for treatment and prevention leading to the prognostic improvement in NASH.

关键词： Nonalcoholic steatohepatitis Hepatocellular carcinoma Multicentric occurrence

Factors predicting aggressiveness of non-hypervascular hepatic nodules detected on hepatobiliary phase of gadolinium ethoxybenzyl diethylene-triamine-pentaacetic-acid magnetic resonance imaging

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World Journal of Gastroenterology 2015年第15期21卷 4583-4591页

作者： Tsutomu Kanefuji Toru Takano Takeshi Suda Kouhei Akazawa Takeshi Yokoo Hiroteru Kamimura Kenya Kamimura Atsunori Tsuchiya masaaki takamura Hirokazu Kawai Satoshi Yamagiwa Hidefumi Aoyama Minoru Nomoto Shuji Terai Deparatment of Gastro-enterology and Hepatology Uonuma Institute of Community Medicine Niigata University Medical and Dental Hospital 4132 Urasa Minami--Uonuma Department of Radiation Oncology Graduate School of Medical and Dental Sciences Niigata University Niigata Department of Medical Informatics Graduate School of Medical and Dental Sciences Niigata University Niigata Department of Gastroenterology and Hepatology Graduate School of Medical and Dental Sciences Niigata University Niigata

AIM: To establish a prognostic formula that distinguishes non-hypervascular hepatic nodules(NHNs) with higher aggressiveness from less hazardous one. METHODS: Seventy-three NHNs were detected in gadolinium ethoxybenzyl diethylene-triamine-pentaaceticacid magnetic resonance imaging(Gd-EOB-DTPA-MRI) study and confirmed to change 2 mm or more in size and/or to gain hypervascularity. All images were interpreted independently by an experienced, board-certified abdominal radiologist and hepatologist; both knew thatthe patients were at risk for hepatocellular carcinoma development but were blinded to the clinical information. A formula predicting NHN destiny was developed using a generalized estimating equation model with thirteen explanatory variables: age, gender, background liver diseases, Child-Pugh class, NHN diameter, T1-weighted imaging/T2-weighted imaging detectability, fat deposition, lower signal intensity in arterial phase, lower signal intensity in equilibrium phase, α-fetoprotein, des-γ-carboxy prothrombin, α-fetoprotein-L3, and coexistence of classical hepatocellular carcinoma. The accuracy of the formula was validated in bootstrap samples that were created by resampling of 1000 iterations. RESULTS: During a median follow-up period of 504 d, 73 NHNs with a median diameter of 9 mm(interquartile range: 8-12 mm) grew or shrank by 68.5%(fifty nodules) or 20.5%(fifteen nodules), respectively, whereas hypervascularity developed in 38.4%(twenty eight nodules). In the fifteen shrank nodules, twelve nodules disappeared, while 11.0%(eight nodules) were stable in size but acquired vascularity. A generalized estimating equation analysis selected five explanatories from the thirteen variables as significant factors to predict NHN progression. The estimated regression coefficients were 0.36 for age, 6.51 for lower signal intensity in arterial phase, 8.70 or 6.03 for positivity of hepatitis B virus or hepatitis C virus, 9.37 for des-γ-carboxy prothrombin, and-4.05 for fat d

关键词： Hepatocellular carcinoma Magnetic resonanceimaging Ethoxybenzyl moiety Non-hypervascular hepaticnodule Fate prediction

Initial decrease in the lipoprotein(a)level is a novel prognostic biomarker in patients with acute coronary syndrome

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World Journal of Cardiology 2024年第6期16卷 329-338页

作者： Yasuhiko Saeki Jun Sawaguchi Satori Akita Taka-aki takamura Kosuke Fujibayashi Minoru Wakasa Hironobu Akao Michihiko Kitayama Yasuyuki Kawai Kouji Kajinami Department of Cardiology Kanazawa Medical UniversityUchinada 9200293Japan Trans-catheter Cardiovascular Therapeutics Kanazawa Medical UniversityUchinada 9200293Japan

BACKGROUND Lipoprotein(a)[Lp(a)]is a causal risk factor for atherosclerotic cardiovascular diseases;however,its role in acute coronary syndrome(ACS)remains *** To investigate the hypothesis that the Lp(a)levels are altered by various conditions during the acute phase of ACS,resulting in subsequent cardiovascular *** From September 2009 to May 2016,377 patients with ACS who underwent emergent coronary angiography,and 249 who completed≥1000 d of follow-up were ***(a)levels were measured using an isoform-independent assay at each time point from before percutaneous coronary intervention(PCI)to 48 h after *** primary endpoint was the occurrence of major adverse cardiac events(MACE;cardiac death,other vascular death,ACS,and non-cardiac vascular events).RESULTS The mean circulating Lp(a)level decreased significantly from pre-PCI(0 h)to 12 h after(19.0 mg/dL to 17.8 mg/dL,P<0.001),and then increased significantly up to 48 h after(19.3 mg/dL,P<0.001).The changes from 0 to 12 h[Lp(a)Δ0-12]significantly correlated with the basal levels of creatinine[Spearman’s rank correlation coefficient(SRCC):-0.181,P<0.01]and Lp(a)(SRCC:-0.306,P<0.05).Among the tertiles classified according to Lp(a)Δ0-12,MACE was significantly more frequent in the lowest Lp(a)Δ0-12 group than in the remaining two tertile groups(66.2%vs 53.6%,P=0.034).A multivariate analysis revealed that Lp(a)Δ0-12[hazard ratio(HR):0.96,95%confidence interval(95%CI):0.92-0.99]and basal creatinine(HR:1.13,95%CI:1.05-1.22)were independent determinants of subsequent *** Circulating Lp(a)levels in patients with ACS decreased significantly after emergent PCI,and a greater decrease was independently associated with a worse prognosis.

关键词： Lipoprotein(a) Acute coronary syndrome Percutaneous coronary intervention Major adverse cardiac events Prognosis

Magnetic and electrical properties of zincblende CrAs

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Chinese Physics B 2008年第6期17卷 2204-2207页

作者：陈鹏 takamura K SouthWest University Department of Physics Research Institute of Electrical Communication Tohoku University

This paper reports that 9nm zincblende CrAs is grown by molecular-beam epitaxy on InAs buffer layer. The zb-CrAs shows ferromagnetism at room temperature and the total magnetic moment 3.09 ±0.15μB per CrAs unit. The... 详细信息

关键词： zincblende molecular-beam epitaxy half-metal

Recovery of Tungsten Surface with Fiber-Form Nanostructure by Plasmas Exposures

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Plasma Science and Technology 2013年第2期15卷 161-165页

作者： Takanori MIYAMOTO Shuichi takamura Hiroaki KURISHITA Department of Electrical Engineering Faculty of EngineeringAichi Institute of TechnologyToyota 470-0392Japan International Research Center for Nuclear Materials Science IMRTohoku UniversityOaraiIbaraki 311-1313 Japan

One of the serious concerns for tungsten materials in fusion devices is the radiation defects caused by helium plasma irradiation since helium is a fusion product. The fiber-formed nanostructure is thought to have a possible weakness against the plasma heat flux on the plasma- facing component and also may destroy the reflectivity of optical mirrors. In this paper an inter- esting method for the recovery of such tungsten surfaces is shown. The recovery process depends on the grade and manufacturing process of tungsten materials.

关键词： helium defects tungsten plasma-surface interaction fiber-form nanostruc-ture surface recovery