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1一组高效稳定纤维素分解菌复合系MC1的筛选及功能显示文摘从 4种堆肥样品中分别筛选出纤维素分解能力较强的 4组混合菌 ,再以酸碱反应互补的原则重新优化组合并驯化成 1组纤维素分解能力非常强而稳定的纤维素分解菌复合系MC1 .1 0 0mL培养物在 5 0℃静止培养 72h ,分别可分解 0 48g滤纸、0 49g脱脂棉、0 1 9g麦秆和 0 0 8g锯末 .分解滤纸时 ,第 2 4hCMC糖化力最高 ,为1 2 2 3U·mL- 1.在初始pH4~ 1 0的不同培养基上接种 ,均能把 pH调到中性 ,最后稳定在 8 0~ 8 5之间 .在连续投放滤纸情况下纤维素分解能力稳定保持 2 0d以上 ,其发酵液的 pH在有滤纸时稳定在 6 0~ 6 5之间 ,没有滤纸时稳定在 8 0~ 8崔宗均 李美丹 朴哲 黄志勇 Masaharu Ishii Yasuo Igarashi 2002环境科学2002,23,3:192
2内皮细胞和平滑肌细胞氧化应激时Nrf2/ARE信号通路对抗氧化基因表达的调控:与动脉粥样硬化和先兆子痫的关系显示文摘动脉粥样硬化、糖尿病、慢性肾功能衰竭和先兆子痫等血管疾病时活性氧(reactive oxygen species,ROS)生成增加,容易导致内皮依赖性血管舒张功能的损害和血管损伤,而细胞可以诱导多种编码Ⅱ相解毒酶和抗氧化蛋白的基因表达,从而减轻ROS和亲电子物质介导的细胞损伤。一个被称为抗氧化反应元件(antioxidant response element,ARE)或亲电子反应元件(electrophile response element,EpRE)的顺式转录调控元件,可以介导诸如亚铁血红素加氧酶1、γ-谷氨酰半胱氨酸合成酶、硫氧还蛋白还原酶、谷胱甘肽-S转移酶和NAD(P)H:苯醌氧化还原酶等基因的转录。其他抗氧化酶,如超氧化物歧化酶、过氧化氢酶和非酶清除剂(如谷胱甘肽)等也参与ROS的清除。转录因子NF-E2相关因子2(nuclear factor-erythroid 2-related factor 2, Nrf2)是属于Cap‘n’Collar家族的转录因子,具有碱性亮氨酸拉链(basic region-leucine zipper,bZIP),它在ARE介导的抗氧化基因表达中起重要的作用。在正常情况下,Kelch样环氧氯丙烷相关蛋白-1(Kelch-like ECH-associated protein-1,Keapl)与Nrf2耦联,并与肌动蛋白细胞骨架结合被锚定于胞浆,但是在半胱氨酸残基发生氧化的情况下,Nrf2和Keapl解耦联,进入细胞核并与ARE结合,从而激活多种抗氧化基因和Ⅱ相解毒酶基因的转录。蛋白激酶C、丝裂原活化蛋白激酶和磷脂酰肌醇-3激酶参与Nrf2/ARE信号转导的调控。本文综述了有关Nrf2/ARE信号转导通路在血管稳态和动脉硬化、先兆子痫等疾病情况下内皮及平滑肌细胞对抗持续性氧化应激中起的作用。Giovanni E. Mann Jorg Niehueser-Saran Alan Watson Ling Gao Tetsuro Ishii Patricia de Winter Richard C. M. Siow 2007生理学报2007,59,2:35
3Ultra-thin, planar, Babinet-inverted plasmonic metalenses显示文摘We experimentally demonstrate the focusing of visible light with ultra-thin,planar metasurfaces made of concentrically perforated,30-nm-thick gold films.The perforated nano-voids—Babinet-inverted(complementary)nano-antennas—create discrete phase shifts and form a desired wavefront of cross-polarized,scattered light.The signal-to-noise ratio in our complementary nano-antenna design is at least one order of magnitude higher than in previous metallic nano-antenna designs.We first study our proof-of-concept‘metalens’with extremely strong focusing ability:focusing at a distance of only 2.5 mm is achieved experimentally with a 4-mm-diameter lens for light at a wavelength of 676 nm.We then extend our work with one of these‘metalenses’and achieve a wavelength-controllable focal length.Optical characterization of the lens confirms that switching the incident wavelength from 676 to 476 nm changes the focal length from 7 to 10 mm,which opens up new opportunities for tuning and spatially separating light at different wavelengths within small,micrometer-scale areas.All the proposed designs can be embedded on-chip or at the end of an optical fiber.The designs also all work for two orthogonal,linear polarizations of incident light.Xingjie Ni Satoshi Ishii Alexander V Kildishev Vladimir M Shalaev 2013Light(Science & Applications)2013,2,1:20
4Cooperative function of antioxidant and redox systems against oxidative stress in male reproductive tissues显示文摘Reactive oxygen species (ROS) are produced under oxidative stress, such as high oxygen concentration and during the metabolic consumption of oxygen molecules. Male reproductive tissues appear to be continuously exposed to ROS produced by active metabolism. In addition, spermatozoa must pass through a high oxygen environ-ment during the mating process. Thus, to maintain viable reproductive ability, a protective mechanism against oxida-tive stress is of importance. Here, we overview our current understanding of the cooperative function of antioxidative and redox systems that are involved in male fertility. Superoxide dismutase and glutathione peroxidase are major enzymes that scavenge harmful ROS in male reproductive organs. In turn, glutathione and thioredoxin systems constitute the main redox systems that repair oxidized and damaged molecules and also play a role in regulating a variety of cellular functions. While glutathione functions as an antioxidant by donating electrons to glutathione peroxidase and thioredoxin donates electrons to peroxiredoxin as a counterpart of glutathione peroxidase. In addition,aldo-keto reductases, which detoxify carbonyl compounds produced by oxidative stress, are present at high levels in the epithelia of the genital tract and Sertoli cells of the testis. Since these systems are involved in cross-talk, a comprehensive understanding will be required to maintain the physiological functions of male reproductive system.( Asian J Andro12003 Sep; 5: 231-242)Junichi Fujii Yoshihito Iuchi Shingo Matsuki Tatsuya Ishii 2003Asian Journal of Andrology2003,5,3:19
5Prognostic roles of preoperative α-fetoprotein and des-γ-carboxy prothrombin in hepatocellular carcinoma patients显示文摘AIM:To clarify the utility of using des-γ-carboxy prothrombin(DCP)andα-fetoprotein(AFP)levels to predict the prognosis of hepatocellular carcinoma(HCC)in patients with hepatitis B virus(HBV)and the hepatitis C virus(HCV)infections.METHODS:A total of 205 patients with HCC(105patients with HBV infection 100 patients with HCV infection)who underwent primary hepatectomy between January 2004 and May 2012 were enrolled retrospectively.Preoperative AFP and DCP levels were used to create interactive dot diagrams to predict recurrence within 2 years after hepatectomy,and cutoff levels were calculated.Patients in the HBV and HCV groups were classified into three groups:a group with low AFP and DCP levels(LL group),a group in which one of the two parameters was high and the other was low(HL group),and a group with high AFP and DCP levels(HH group).Liver function parameters,the postoperative recurrence-free survival rate,and postoperative overall survival were compared between groups.The survival curves were compared by logrank test using the Kaplan-Meier method.Multivariate analysis using a Cox forward stepwise logistic regression model was conducted for a prognosis.RESULTS:The preoperative AFP cutoff levels for recurrence within 2 years after hepatectomy in the HBV and HCV groups were 529.8 ng/m L and 60 m AU/m L,respectively;for preoperative DCP levels,the cutoff levels were 21.0 ng/m L in the HBV group and 67 m AU/m L in the HCV group.The HBV group was significantly different from the other groups in terms of vascular invasion,major hepatectomy,volume of intraoperative blood loss,and surgical duration.Significant differences were found between the LL group,the HL group,and the HH group in terms of both mean disease-free survival time(MDFST)and mean overall survival time(MOST):64.81±7.47 vs 36.63±7.62 vs 18.98±6.17mo(P=0.001)and 85.30±6.55 vs 59.44±7.87 vs46.57±11.20 mo(P=0.018).In contrast,the HCV group exhibited a significant difference in tumor size,vascular invasion,volume of intraoperative blood loss,and surgical duration;however,no significant difference was observed between the three groups in liver function parameters except for albumin levels.In the LL group,the HL group,and the HH group,the MDFST was 50.09±5.90,31.01±7.21,and 14.81±3.08 mo(log-rank test,P<0.001),respectively,and the MOST was 79.45±8.30,58.82±7.56,and 32.87±6.31 mo(log-rank test,P<0.001),respectively.CONCLUSION:In the HBV group,the prognosis was poor when either AFP or DCP levels were high.In the HCV group,the prognosis was good when either or both levels were low;however,the prognosis was poor when both levels were high.High levels of both AFP and DCP were an independent risk factor associated with tumor recurrence in the HBV and HCV groups.The relationship between tumor marker levels and prognosis was characteristic to the type of viral hepatitis.Makoto Meguro Toru Mizuguchi Toshihiko Nishidate Kenji Okita Masayuki Ishii Shigenori Ota Tomomi Ueki Emi Akizuki Koichi Hirata 2015World Journal of Gastroenterology2015,21,16:16
6Can the biliary enhancement of Gd-EOB-DTPA predict the degree of liver function?显示文摘BACKGROUND: Excretion of gadolinium-ethoxybenzyl-diethyl- enetriamine pentaacetic acid (Gd-EOB-DTPA) in the bile may be related to liver function, because of elimination from the liver after preferential uptake by hepatocytes. The purpose of this study was to investigate the relation between liver and biliary enhancement in patients with or without liver dysfunction, and to compare the tumor-to-liver contrast in these patients. METHODS: Forty patients [group 1: normal liver and Child Pugh class A in 20 patients, group 2: Child-Pugh class B in 18 patients and Child-Pugh C in 2] were evaluated. All patients underwent MR imaging of the liver using a 1.5-Tesla system. T1 weighted 3D images were obtained at 5, 10, 15 and 20 minutes after Gd-EOB-DTPA injection. The relation between group 3 (total bilirubin <1.8 mg/dL) and group 4 (total bilirubin ≥1.8 mg/dL) was investigated at 20 minutes. Liver and biliary signals were measured, and compared between groups 1 and 2 or groups 3 and 4. Tumor-to-liver ratio was also evaluated between groups 1 and 2. Scheffé's post-hoc test after two-way repeated measures ANOVA and Pearson's correlation test were used for statistical analysis. RESULTS: Liver enhancement showed significant difference at all time points between groups 1 and 2. Biliary enhancement did not show a significant difference between groups 1 and 2 at 5 minutes, but did at 10, 15 and 20 minutes. At 20 minutes significant differences between groups 3 and 4 were seen for liver and biliary enhancement. At all time points, liver enhancement correlated with biliary enhancement in both groups. At 5 minutes and 20 minutes, statistical differences between groups 1 and 2 were seen for tumor-to-liver ratio.CONCLUSIONS: The degree of biliary enhancement has a close correlation to that of liver enhancement. It is especially important that insufficient liver enhancement causes lower tumor-to-liver contrast in the hepatobiliary phase of Gd-EOB- DTPA.Masahiro Okada Kazunari Ishii Kazushi Numata Tomoko Hyodo Seishi Kumano Masayuki Kitano Masatoshi Kudo Takamichi Murakami 2012Hepatobiliary & Pancreatic Diseases International2012,11,3:13
7Herbal cardiotonic pills prevent gut ischemia/reperfusion-induced hepatic microvascular dysfunction in rats fed ethanol chronically显示文摘AIM: Cardiotonic Pill (CP), an oral herbal medicine that includes Danshen (Salviae Miltiorrhizae), Panax notoginseny and Dyroblanops aromatica gaertn, has been clinically used for vascular diseases such as occlusive vasculitis, coronary diseases, atherosclerosis, and cerebral infarction. The main component, SaMae Miltiorrhizae, has been reported to prevent cerebral and intestinal reperfusion injury. However, little is known about the effect of CP on hepatic microcirculation.Thus, this study aimed to determine whether CP could affect hepatic microvascular dysfunction elicited by gut ischemia/reperfusion (I/R) in rats fed ethanol chronically.METHODS: Male Wistar rats were pair-fed with a liquid diet containing ethanol or isocaloric control diet for 6 wk. After laparotomy, one lobe of the liver was examined through an inverted intravital microscope. The rats were exposed to 30 rain of gut ischemia followed by 60 rain of reperfusion.Rhodamine-6G-labeled leukocytes in the sinusoids were observed 90 rain after the onset of superior mesenteric artery ocdusion. Plasma tumor necrosis factor (TNF)-α and endotoxin levels were measured 1 h after the onset of reperfusion.Plasma alanine aminotransferase (ALT) activities were measured 6 h after the onset of reperfusion. In another set of experiments, CP (0.8 g/kg, intragastrically) was administered 1 and 24 h before the onset of ischemia.RESULTS: In control rats, gut I/R elicited increases in the number of stationary leukocytes, and plasma TNF-α and endotoxin levels and plasma ALT activities. These changes were mitigated by pretreatment with CP. In ethanol-fed rats,the gut I/R-induced increases in the number of stationary leukooltes, plasma endotoxin levels and ALT activities were enhanced. Pretreat^nent with CP attenuated the enhancement of gut I/R-induced responses by chronic ethanol consumption.CONCLUSION: These results suggest that CP prevents the gut I/R-induced hepatic microvascular dysfunction and hepatocellular injury. A reduction of inflammatory responses such as TNF-α production via reduction of blood endotoxin levels appears to be involved in the mechanisms. Chronic ethanol consumption enhances gut I/R-induced hepatic microvascular and hepatocellular injury. CP also attenuates an enhancement of gut I/R-induced responses by chronic ethanol consumption via the reduction of blood endotoxin levels.Yoshinori Horie Shuka Mori Masahiro Konishi Mikio Kajihara Takehiko Kaneko Yoshiyuki Yamagishi Shinzo Kato Hiromasa Ishii Toshifumi Hibi 2005World Journal of Gastroenterology2005,11,4:13
8Endoscopic hemostasis techniques for upper gastrointestinal hemorrhage: A review显示文摘Upper gastrointestinal hemorrhage (UGIH) is an urgent disease that is often encountered in daily medical practice. Endoscopic hemostasis is currently indispensable for the treatment of UGIH. Initially, when UGIH is suspected, a cause of UGIH is presumed from the medical interview and physical findings. After ample primary treatment, urgent endoscopy is performed. Many methods of endoscopic hemostasis are in wide use, including hemoclip, injection and thermo-coagulation methods. Although UGIH develops from a wide variety of diseases, such as esophageal varices and gastric and duodenal ulcer, hemostasis is almost always possible. Identification of the causative diseases, primary treatment and characteristic features of endoscopic hemostasis are needed to allow appropriate treatment.Hajime Anjiki Terumi Kamisawa Masaki Sanaka Taro Ishii Yasushi Kuyama 2010World Journal of Gastrointestinal Endoscopy2010,2,2:13
9The nature and growth of vertical specialization in world trade显示文摘David Hummels Jun Ishii Kei-Mu Yi 2001Journal of International Economics2001,,1:13
10Endoscopic ultrasound-guided choledochoduodenostomy in patients with failed endoscopic retrograde cholangiopancreatography显示文摘Endoscopic ultrasonography (EUS)-guided biliary drainage was performed for treatment of patients who have obstructive jaundice in cases of failed endoscopic retrograde cholangiopancreatography (ERCP). In the present study,we introduced the feasibility and outcome of EUS-guided choledochoduodenostomy in four patients who failed in ERCP. We performed the procedure in 2 papilla of Vater,including one resectable case,and 2 cases of cancer of the head of pancreas. Using a curved linear array echoendoscope,a 19 G needle or a needle knife was punctured transduodenally into the bile duct under EUS visualization. Using a biliary catheter for dilation,or papillary balloon dilator,a 7-Fr plastic stent was inserted through the choledochoduodenostomy site into the extrahepatic bile duct. In 3 (75%) of 4 cases,an indwelling plastic stent was placed,and in one case in which the stent could not be advanced into the bile duct,a naso-biliary drainage tube was placed instead. In all cases,the obstructive jaundice rapidly improved after the procedure. Focal peritonitis and bleeding not requiring blood transfusion was seen in one case. In this case,pancreatoduodenectomy was performed and the surgical findings revealed severe adhesion around the choledochoduodenostomy site. Although further studies and development of devices are mandatory,EUS-guided choledochoduodenostomy appears to be an effective alternative to ERCP in selected cases.Takao Itoi Fumihide Itokawa Atsushi Sofuni Toshio Kurihara Takayoshi Tsuchiya Kentaro Ishii Shujiro Tsuji Nobuhito Ikeuchi Fuminori Moriyasu 2008World Journal of Gastroenterology2008,14,39:13
11Propensity score analysis demonstrated the prognostic advantage of anatomical liver resection in hepatocellular carcinoma显示文摘AIM:To compare the prognoses of hepatocellular carcinoma(HCC)patients that underwent anatomic liver resection(AR)or non-anatomic liver resection(NAR)using propensity score-matched populations.METHODS:Between January 2002 and December2010,268 consecutive HCC patients,including 110 and158 patients that underwent AR and NAR,respectively,were retrospectively enrolled in this study.Forty-four patients from each group were selected and matched using logistic multivariate analysis followed by propensity score analysis.RESULTS:In the whole analysis set,the histological background of the liver,liver function,and tumor marker levels differed significantly among the groups.Although the overall survival(OS)and recurrence-free survival rates of the two groups did not differ significantly in the whole analysis set,the OS of the AR group was significantly longer than that of the NAR group after propensity matching(76.2±6.3 mo vs 58.9±6.3mo;P=0.0039).Although AR(HR=0.456,P=0.039)was found to be a prognostic factor in the univariate analysis,only vascular invasion(HR=0.228,P=0.002)and the hepatocyte growth factor level(HR=52.366,P=0.035)were subsequently found to be independent prognostic factors.CONCLUSION:AR conveys a survival advantage over NAR in specific subpopulations of HCC patients with tumors of less than 5 cm in diameter,single tumor,and good liver function.Masayuki Ishii Toru Mizuguchi Masaki Kawamoto Makoto Meguro Shigenori Ota Toshihiko Nishidate Kenji Okita Yasutohsi Kimura Thomas T Hui Koichi Hirata 2014World Journal of Gastroenterology2014,20,12:12
12Hypofractionated stereotactic rad iotherapy alone without whole-brain irradiation for patien ts with solitary and oligo brain metastasis using noninvasive fixation of the skull显示文摘To evaluate the efficacy and toxicity of hypofractionated stereotactic radiotherapy(HSRT)using noninvasive fixation of the sk ull on solitary or oligo brain metastatic p atients as an alternative to stereotactic radiosurgery(SRS)using invasive fixation.The subjects were 87patients who had 4or fewer brain meta stases(50solitary,37oligometastases).Treatment was conducted on 159meta stases by using a linac-based stereotactic system.T he median isocentric dose was 35Gy in4fractions.Whole-brain irradiati on was not applied as an initial treatment.For the salvage treatmen t of metachronous brain metastases,repeat HSRT or whole-brain irradiation was applied.The actuarial1-year local tumor control rate was 81%.Treatment-related complicatio ns were observed in 4patients in the e arly period(<3months)and in 2patients in the late period.T he median survival period was 8.7mon ths.Metachronous brain metastases occurred in 30patients,and none of the 18patients who were eligible for salvage HSRT refused to re ceive it again.Hypofractionated stereotactic radiotherapy achieved tumor control and survival equivalent to those of SRS reported i n the literature.The results suggested that HSRT could be an alternative for solitary or oligo br ain metastatic patients with less to xicity and less invasiveness compared toAoyama H Shirato H Onimaru R Kagei K Ikeda J Ishii N Sawamura Y Miyasaka K 2003癌症2003,22,7:12
13Safety trial of high-intensity focused ultrasound therapy for pancreatic cancer显示文摘AIM:To evaluate the safety and clinical application of high-intensity focused ultrasound(HIFU)therapy for unresectable pancreatic cancer(PC).METHODS:Thirty PC patients(16 cases in stage III and 14 cases in stage IV)with visualized pancreatic tumors were admitted for HIFU therapy as an optional local therapy in addition to systemic chemotherapy or chemoradiotherapy.Informed consent was obtained.This study began at the end of 2008 and was approved by the ethics committee of our hospital[Institutional Review Board(IRB):890].The HIFU device used was the FEP-BY02(Yuande Bio-Medical Engineering,Beijing,China).RESULTS:The mean tumor size after HIFU therapy changed to 30.9±1.7 mm from 31.7±1.7 mm at pre-therapy.There were no significant changes in tumor size,mean number of treatment sessions(2.7±0.1 mm),or mean total treatment time(2.4±0.1 h).The rate of symptom relief effect was 66.7%.The effectiveness of primary lesion treatment was as follows:complete response,0;partial response,4;stable disease,22;progressive disease,4.Treatment after HIFU therapy included 2 operations,24 chemotherapy treatments,and 4 best supportive care treatments.Adverse events occurred in 10%of cases,namely pseudocyst formation in 2 cases and mild pancreatitis development in 1.However,no severe adverse events occurred in this study.CONCLUSION:We suggest that HIFU therapy is safe and has the potential to be a new method of combination therapy for PC.Atsushi Sofuni Fuminori Moriyasu Takatomo Sano Fumihide Itokawa Takayoshi Tsuchiya Toshio Kurihara Kentaro Ishii Syujiro Tsuji Nobuhito Ikeuchi Reina Tanaka Junko Umeda Ryosuke Tonozuka Mitsuyoshi Honjo Shuntaro Mukai Mitsuru Fujita Takao Itoi 2014World Journal of Gastroenterology2014,20,28:12
14Surgical treatment of hepatocellular carcinoma with severe intratumoral arterioportal shunt显示文摘We report a case of hepatocellular carcinoma (HCC) that caused a severe arterioportal shunt (APS). A 49-year-old man was admitted to hospital due to esophagogastric variceal hemorrhage and HCC, and underwent endoscopic variceal ligation (EVL) and endoscopic injection sclerotherapy (EIS). He was then referred to our hospital. Abdominal computed tomography revealed a lowdensity lesion in the posterior segment of the liver and an intratumoral APS, which caused portal hypertension. Although the patient underwent EVL, EIS, Hassab’s operation, and transcatheter arterial embolization for APS, he vomited blood due to rupture of esophagogastric varices. Right hepatectomy was performed for the treatment of HCC and APS, although the indocyanine green retention value at 15 min after intravenous injection was poor (30%). The patient’s postoperative course was uneventful. Eventually, APS disappeared and the esophagogastric varices improved.Hiromichi Ishii Teruhisa Sonoyama Shingo Nakashima Hiroyuki Nagata Atsushi Shiozaki Yoshiaki Kuriu Hisashi Ikoma Masayoshi Nakanishi Daisuke Ichikawa Hitoshi Fujiwara Kazuma Okamoto Toshiya Ochiai Yukihito Kokuba Chohei Sakakura Eigo Otsuji 2010World Journal of Gastroenterology2010,16,25:11
15Safety of immediate endoscopic sphincterotomy in acutesuppurative cholangitis caused by choledocholithiasis显示文摘AIM: To examine the safety of immediate endoscopic sphincterotomy(EST) in patients with acute suppurative cholangitis(ASC) caused by choledocholithiasis, as compared with elective EST.METHODS: Patients with ASC due to choledocholithiasis were allocated to two groups: Those who underwent EST immediately and those who underwent EBD followed by EST 1 wk later because they were under anticoagulant therapy, had a coagulopathy(international normalized ratio > 1.3, partial thromboplastin time greater than twice that of control), or had a platelet count < 50000 × 103/μL. One of four trainees [200-400 cases of endoscopic retrograde cholangiopancreatography(ERCP)] supervised by a specialist(> 10000 cases of ERCP) performed the procedures. The success and complication rates associated with EST in each group were examined.RESULTS: Of the 87 patients with ASC, 59 were in the immediate EST group and 28 in the elective EST group. EST was successful in all patients in both groups. There were no complications associated with EST in either group of patients, although white blood cell count, C-reactiveprotein, total bilirubin, and serum concentrations of liver enzymes just before EST were significantly higher in the immediate EST group than in the elective EST group.CONCLUSION: Immediate EST can be as safe as elective EST for patients with ASC associated with choledocholithiasis provided they are not under anticoagulant therapy, or do not have a coagulopathy or a platelet count < 50000 × 103/μL. Moreover, the procedure was safely performed by a trainee under the supervision of an experienced specialist.Tomoyasu Ito Jin Kan Sai Hironao Okubo Hiroaki Saito Shigeto Ishii Ryo Kanazawa Ko Tomishima SumioWatanabe Shuichiro Shiina 2016World Journal of Gastrointestinal Endoscopy2016,8,3:10
16Glucagon-like peptide-1 analogue prevents nonalcoholic steatohepatitis in non-obese mice显示文摘AIM: To investigate whether a glucagon-like peptide-1(GLP-1) analogue inhibits nonalcoholic steatohepatitis(NASH), which is being increasingly recognized in Asia, in non-obese mice. METHODS: A methionine-choline-deficient diet(MCD) along with exendin-4(20 μg/kg per day, ip), a GLP-1 analogue, or saline was administered to male db/db mice(non-obese NASH model). Four or eight weeks after commencement of the diet, the mice were sacrificed and their livers were excised. The excised livers were examined by histochemistry for evidence of hepatic steatosis and inflammation. Hepatic triglyceride(TG) and free fatty acid(FFA) content was measured, and the expression of hepatic fat metabolism- and inflammation-related genes was evaluated. Oxidative stress-related parameters and macrophage recruitment were also examined using immunohistochemistry.RESULTS: Four weeks of MCD feeding induced hepatic steatosis and inflammation and increased the hepatic TG and FFA content. The expression of fattyacid transport protein 4(FATP4), a hepatic FFA influxrelated gene; macrophage recruitment; and the level of malondialdehyde(MDA), an oxidative stress marker, were significantly augmented by a 4-wk MCD. The levels of hepatic sterol regulatory element-binding protein-1c(SREBP-1c) m RNA(lipogenesis-related gene) and acyl-coenzyme A oxidase 1(ACOX1) m RNA(β-oxidation-related gene) had decreased at 4 wk and further decreased at 8 wk. However, the level of microsomal triglyceride transfer protein m RNA(a lipid excretion-related gene) remained unchanged. The administration of exendin-4 significantly attenuated the MCD-induced increase in hepatic steatosis, hepatic TG and FFA content, and FATP4 expression as well as the MCD-induced augmentation of hepatic inflammation, macrophage recruitment, and MDA levels. Additionally, it further decreased the hepatic SREBP-1c level and alleviated the MCD-mediated inhibition of the ACOX1 m RNA level. CONCLUSION: These results suggest that GLP-1 inhibits hepatic steatosis and inflammation through the inhibition of hepatic FFA influx and oxidative stress in a non-obese NASH model.Takaya Yamamoto Yukiomi Nakade Taeko Yamauchi Yuji Kobayashi Norimitsu Ishii Tomohiko Ohashi Kiyoaki Ito Ken Sato Yoshitaka Fukuzawa Masashi Yoneda 2016World Journal of Gastroenterology2016,22,8:10
17Paraneoplastic syndromes associated with lung cancer显示文摘Paraneoplastic syndromes are signs or symptoms that occur as a result of organ or tissue damage at locations remote from the site of the primary tumor or metastases. Paraneoplastic syndromes associated with lung cancer can impair various organ functions and include neurologic, endocrine, dermatologic, rheumatologic, hematologic, and ophthalmological syndromes, as well as glomerulopathy and coagulopathy(Trousseau's syndrome). The histological type of lung cancer is generally dependent on the associated syndrome, the two most common of which are humoral hypercalcemia of malignancy in squamous cell carcinoma and the syndrome of inappropriate antidiuretic hormone secretion in small cell lung cancer. The symptoms often precede the diagnosis of the associated lung cancer, especially when the symptoms are neurologic or dermatologic. The proposed mechanisms of paraneoplastic processes include the aberrant release of humoral mediators, such as hormones and hormone-like peptides, cyto-kines, and antibodies. Treating the underlying cancer is generally the most effective therapy for paraneoplastic syndromes, and treatment soon after symptom onset appears to offer the best potential for symptom improvement. In this article, we review the diagnosis, potential mechanisms, and treatments of a wide variety of paraneoplastic syndromes associated with lung cancer.Nobuhiro Kanaji Naoki Watanabe Nobuyuki Kita Shuji Bandoh Akira Tadokoro Tomoya Ishii Hiroaki Dobashi Takuya Matsunaga 2014World Journal of Clinical Oncology2014,5,3:10
18Cell sheet technology for regeneration of esophageal mucosa显示文摘The progress of tissue-engineering technology has realized development of new therapies to treat various disorders by using cultured cells. Cell-and tissue-based therapies have been successfully applied to human patients, and several tissue-engineered products have been approved by the regulatory agencies and are commercially available. In the review article, we describe our experience of development and clinical application of cell sheet-based regenerative medicine.Endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD) have been shown to be useful for removal of gastrointestinal neoplasms with less invasiveness compared with open surgery, especially in esophageal surgery. However, postoperative inflammation and stenosis are major complications observed after intensive mucosal resection. Therefore, we have developed novel regenerative medicine to prevent such complications and promote wound healing of esophageal mucosa after EMR or ESD. Transplantable oral mucosal epithelial cell sheets were fabricated from patients' own oral mucosa. Immediately after EMR or ESD, fabricated autologous cell sheets were endoscopically transplanted to the ulcer sites. We performed a preclinical study with a canine model. In human clinical settings, cell culture and cell sheet fabrication were performed in clean rooms according to good manufacturing practice guidelines, and pharmaceutical drugs were used as supplements to culture medium in place of research regents used in animal study. We believe that cell-based regenerative medicine would be useful to improve quality of life of patients after EMR or ESD.Ryo Takagi Masayuki Yamato Nobuo Kanai Daisuke Murakami Makoto Kondo Takaaki Ishii Takeshi Ohki Hideo Namiki Masakazu Yamamoto Teruo Okano 2012World Journal of Gastroenterology2012,18,37:9
19振动工况下环管内气液两相流参数分布实验研究显示文摘为模拟地震对反应堆堆芯内两相流动的影响,将振动产生装置与实验段结合,并利用电导探针技术实验研究了振动工况下环管内气液两相流局部参数的分布特性。振动装置所采用的偏心轮的偏心距为15.875mm,并可通过调节电机转速获得不同的振动周期。环管实验段内径和外径分别为19.1mm和38.1mm,总长度为2.32m。实验以空气和水为工质,流动工况覆盖了泡状流、弹状流及搅混流等流型。实验结果表明,振动对管内气液两相流局部参数如含气率和界面浓度等分布具有重要影响。随振动周期的减小,管内两相流参数分布发生明显变化。另外振动对低含气率的泡状流影响较大,随含气率的增加,流型逐渐向搅混流过度,振动对两相流参数的影响逐渐减小。肖秀 朱庆子 王冠轶 陈绍文 张亚军 贾海军 Mamoru Ishii 2017原子能科学技术2017,51,1:9
20Pegylated interferon plus ribavirin for genotype Ib chronic hepatitis C in Japan显示文摘AIM:To evaluate the efficacy of pegylated interferon α-2b(peg-IFNα-2b) plus ribavirin(RBV) therapy in Japanese patients with chronic hepatitis C(CHC) genotype Ib and a high viral load.METHODS:One hundred and twenty CHC patients(58.3% male) who received peg-IFNα-2b plus RBV therapy for 48 wk were enrolled.Sustained virological response(SVR) and clinical parameters were evaluated.RESULTS:One hundred(83.3%) of 120 patients completed 48 wk of treatment.53 patients(44.3%) achieved SVR.Early virological response(EVR) and end of treatment response(ETR) rates were 50% and 73.3%,respectively.The clinical parameters(SVR vs non-SVR) associated with SVR,ALT(108.4 IU/L vs 74.5 IU/L,P = 0.063),EVR(76.4% vs 16.4%,P < 0.0001),adherence to peg-IFN(≥ 80% of planned dose) at week 12(48.1% vs 13.6%,P = 0.00036),adherence to peg-IFN at week 48(54.7% vs 16.2%,P < 0.0001) and adherence to RBV at week 48(56.1% vs 32.1%,P = 0.0102) were determined using univariate analysis,and EVR and adherence to peg-IFN at week 48 were determined using multivariate analysis.In the older patient group(> 56 years),SVR in females was significantly lower than that in males(17% vs 50%,P = 0.0262).EVR and adherence to Peg-IFN were demonstrated to be the main factors associated with SVR.CONCLUSION:Peg-IFNα-2b plus RBV combination therapy demonstrated good tolerability in Japanese patients with CHC and resulted in a SVR rate of 44.3%.Treatment of elderly female patients is still challenging and maintenance of adherence to peg-IFNα-2b is important in improving the SVR rate.Takayuki Kogure Yoshiyuki Ueno Koji Fukushima Futoshi Nagasaki Yasuteru Kondo Jun Inoue Yasunori Matsuda Eiji Kakazu Takeshi Yamamoto Hiroyoshi Onodera Yutaka Miyazaki Hiromasa Okamoto Takehiro Akahane Tomoo Kobayashi Yutaka Mano Takao Iwasaki Motoyasu Ishii Tooru Shimosegawa 2008World Journal of Gastroenterology2008,14,47:7
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