检索结果-南通市图书馆

Evaluation of safety for hepatectomy in a novel mouse model with nonalcoholic-steatohepatitis

World Journal of Gastroenterology 2018年第15期24卷 1622-1631页

作者： Yusuke Ozawa takafumi tamura Yohei Owada Yoshio Shimizu Akira Kemmochi Katsuji Hisakura Takashi Matsuzaka Hitoshi Shimano Hiroko Isoda Nobuhiro Ohkohchi Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery Faculty of Medicine University of Tsukuba Department of Endocrinology and Metabolism Faculty of Medicine University of Tsukuba Faculty of Life and Environmental Sciences University of Tsukuba

AIM To investigate whether the liver resection volume in a newly developed nonalcoholic steatohepatitis(NASH) model influences surgical outcome.METHODS For establishment of a NASH model, mice were fed a high-fat diet for 4 wk, administered CCl_4 for the last 2 wk, and administered T0901317 for the last 5 d. We divided these mice into two groups: A 30% partial hepatectomy(PH) of NASH liver group and a 70% PH of NASH liver group. In addition, a 70% PH of normal liver group served as the control. Each group was evaluated for survival rate, regeneration, apoptosis, necrosis and DNA expression after PH.RESULTS In the 70% PH of NASH group, the survival rate was significantly decreased compared with that in the control and 30% PH of NASH groups(P < 0.01). 10 of 32 mice in the NASH 70% PH group died within 48 h after PH. Serum aspartate aminotransferase(AST) levels and total bilirubin(T-Bil) in the NASH 70% PH group were significantly higher than the levels in the other two groups(AST: P < 0.05, T-Bil: P < 0.01). In both PH of NASH groups, signaling proteins involved in regeneration were expressed at lower levels than those in the control group(P < 0.01). The 70% PH of NASH group also exhibited a lower number of Ki-67-positive cells and higher rates of apoptosis and necrosis than the NASH 30% PH group(P < 0.01). In addition, DNA microarray assays showed differences in gene expression associated with cell cycle arrest and apoptosis.CONCLUSION The function of the residual liver is impaired in fatty liver compared to normal liver. A larger residual volume is required to maintain liver functions in mice with NASH.

关键词： Hepatectomy Liver regeneration Residual liver Liver proliferation Nonalcoholic steatohepatitis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Kupffer cells and platelets on ischemia-reperfusion injury in mild steatotic liver

引用

World Journal of Gastroenterology 2013年第9期19卷 1396-1404页

作者： Koichi Ogawa Tadashi Kondo takafumi tamura Hideki Matsumura Kiyoshi Fukunaga Tatsuya Oda Nobuhiro Ohkohchi Department of Surgery Graduate School of Comprehensive Human Sciences University of Tsukuba Tsukuba 305-8575 Japan

AIM: To investigate the effect of mild steatotic liver on ischemia-reperfusion injury by focusing on Kupffer cells (KCs) and platelets. METHODS: Wistar rats were divided into a normal liver group (N group) and a mild steatotic liver group (S group) induced by feeding a choline-deficient diet for 2 wk. Both groups were subjected to 20 min of warm ischemia followed by 120 min of reperfusion. The number of labeled KCs and platelets in sinusoids and the blood perfusion in sinusoids were observed by intravital microscopy (IVM), which was performed at 30, 60 and 120 min after reperfusion. To evaluate serum alanine aminotransferase as a marker of liver deterioration, blood samples were taken at the same time as IVM.RESULTS: In the S group, the number of platelets adhering to KCs decreased significantly compared with the N group (120 after reperfusion; 2.9±1.1 cells/acinus vs 4.8±1.2 cells/acinus, P<0.01). The number of KCs in sinusoids was significantly less in the S group than in the N group throughout the observation periods (before ischemia, 19.6±3.3 cells/acinus vs 28.2±4.1 cells/acinus, P<0.01 and 120 min after reperfusion, 29.0±4.3 cells/acinus vs 40.2±3.3 cells/acinus, P<0.01). The blood perfusion of sinusoids 120 min after reperfusion was maintained in the S group more than in the N group. Furthermore, elevation of serum alanine aminotransferase was lower in the S group than in the N group 120 min after reperfusion (99.7±19.8 IU/L vs 166.3±61.1 IU/L, P=0.041), and histological impairment of hepatocyte structure was prevented in the S group. CONCLUSION: Ischemia-reperfusion injury in mild steatotic liver was attenuated compared with normal liver due to the decreased number of KCs and the reduction of the KC-platelet interaction.

关键词： Steatotic liver Mild steatotic liver Kupffer cell Platelet Ischemia-reperfusion Intravital microscopy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New drug delivery system for liver sinusoidal endothelial cells for ischemia-reperfusion injury

引用

World Journal of Gastroenterology 2015年第45期21卷 12778-12786页

作者： Naoki Sano takafumi tamura Naoyuki Toriyabe Takeshi Nowatari Ken Nakayama Tomohito Tanoi Soichiro Murata Yu Sakurai Mamoru Hyodo Kiyoshi Fukunaga Hideyoshi Harashima Nobuhiro Ohkohchi Department of Surgery Doctoral Program in Clinical Science Graduate School of Comprehensive Human Sciences University of Tsukuba Faculty of Pharmaceutical Sciences Hokkaido University

AIM: To investigate the cytoprotective effects in hepatic ischemia-reperfusion injury, we developed a new formulation of hyaluronic acid(HA) and sphingosine 1-phophate.METHODS: We divided Sprague-Dawley rats into 4 groups: control, HA, sphingosine 1-phosphate(S1P), and HA-S1 P. After the administration of each agent, we subjected the rat livers to total ischemia followed by reperfusion. After reperfusion, we performed the following investigations: alanine aminotransferase(ALT), histological findings, Td T-mediated d UTP-biotin nick end labeling(TUNEL) staining, and transmission electron microscopy(TEM). We also investigated the expressionof proteins associated with apoptosis, hepatoprotection, and S1 P accumulation. RESULTS: S1 P accumulated in the HA-S1 P group livers more than S1 P group livers. Serum ALT levels, TUNEL-positive hepatocytes, and expression of cleaved caspase-3 expression, were significantly decreased in the HA-S1 P group. TEM revealed that the liver sinusoidal endothelial cell(LSEC) lining was preserved in the HA-S1 P group. Moreover, the HA-S1 P group showed a greater increase in the HO-1 protein levels compared to the S1 P group.CONCLUSION: Our results suggest that HA-S1 P exhibits cytoprotective effects in the liver through the inhibition of LSEC apoptosis. HA-S1 P is an effective agent for hepatic ischemia/reperfusion injury.

关键词： Hyaluronic acid Sphingosine 1-phosphate Liver sinu

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genomic characterization of esophageal squamous cellcarcinoma:insights from next-generation sequencing

引用

World Journal of Gastroenterology 2016年第7期22卷 2284-2293页

作者： Yasushi Sasaki Miyuki tamura Ryota Koyama takafumi Nakagaki Yasushi Adachi Takashi Tokino Department of Medical Genome Sciences Research Institute for Frontier MedicineSapporo Medical UniversitySapporo 060-8556Japan Department of Gastroenterology Rheumatology and Clinical ImmunologySapporo Medical University School of MedicineSapporo 060-8543Japan

Two major types of cancer occur in the esophagus: squamous cell carcinoma, which is associated with chronic smoking and alcohol consumption, and adenocarcinoma, which typically arises in gastric reflux-associated Barrett's esophagus. Although there is increasing incidence of esophageal adenocarcinoma in Western counties, esophageal squamous cell carcinoma(ESCC) accounts for most esophageal malignancies in East Asia, including China and Japan. Technological advances allowing for massively parallel, high-throughput next-generation sequencing(NGS) of DNA have enabled comprehensive characterization of somatic mutations in large numbers of tumor samples. Recently, several studies were published in which whole exome or whole genome sequencing was performed in ESCC tumors and compared with matched normal DNA. Mutations were validated in several genes, including in TP53, CDKN2 A, FAT1, NOTCH1, PIK3 CA, KMT2 D and NFE2L2, which had been previously implicated in ESCC. Several new recurrent alterations have also been identified in ESCC. Combining the clinicopathological characteristics of patients with information obtained from NGS studies may lead to the development of effective diagnostic and therapeutic approaches for ESCC. As this research becomes more prominent, it is important that gastroenterologist become familiar with the various NGS technologies and the results generated using these methods. In the present study, we describe recent research approaches using NGS in ESCC.

关键词： esophageal squamous cell carcinoma next-generation sequencing somatic mutation Drivermutation copy number variant

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Conjugation of Magnetite Nanoparticles with Melanogenesis Substrate, NPrCAP Provides Melanoma Targeted, <i>in Situ</i>Peptide Vaccine Immunotherapy through HSP Production by Chemo-Thermotherapy

引用

Journal of Biomaterials and Nanobiotechnology 2012年第2期3卷 140-153页

作者： Kowichi Jimbow Yasuaki tamura Akihiro Yoneta takafumi Kamiya Ichiro Ono Toshiharu Yamashita Akira Ito Hiroyuki Honda Kazumasa Wakamatsu Shosuke Ito Satoshi Nohara Eiichi Nakayama Takeshi Kobayashi Department of Biological Chemistry College of Bioscience and Biotechnology Chubu University Ka- sugai Japan. Department of Biotechnology School of Engineering Nagoya University Nagoya Japan Department of Chemical Engineering Faculty of Engineering Kyushu University Fukuoka Japan Department of Chemistry Fujita Health University School of Health Sciences Toyoake Japan Department of Dermatology Sapporo Medical University School of Medicine Sapporo Japan Department of Dermatology Sapporo Medical University School of Medicine Sapporo Japan Faculty of Health and Welfare Kawasaki University of Medical Welfare Kurashiki Japan Institute of Dermatology & Cutaneous Sciences Sapporo Japan Meito Sangyo Co. Nagoya Japan Sapporo Medical University School of Medicine Sapporo Japan

In order to develop melanoma-targeted in situ peptide vaccine immunotherapy, magnetite nanoparticles were conjugated with a melanogenesis substrate, N-propionyl cysteaminylphenol (NPrCAP). Magnetite nanoparticles introduced thermotherapy which caused non-apoptotic cell death and generation of heat shock protein (HSP) upon exposure to alternating magnetic field (AMF). NPrCAP was expected to develop a melanoma-targeted therapeutic drug because of its selective incorporation into melanoma cells and production of highly reactive free radicals, that result in not only oxidative stress but also apoptotic cell death by reacting with tyrosinase.

关键词： Melanogenesis Chemo-Thermo-Immunotherapy Nanomedicine Melanoma Magnetite Nanoparticles

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：