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| 1 | Alterations in the human epidermal growth factor receptor 2-phosphatidylinositol 3-kinase-v-Akt pathway in gastric cancer显示文摘AIM:To investigate human epidermal growth factor receptor 2(HER2)-phosphatidylinositol 3-kinase(PI3K)-vAkt murine thymoma viral oncogene homolog signaling pathway.METHODS:We analyzed 231 formalin-fixed,paraffinembedded gastric cancer tissue specimens from Japanese patients who had undergone surgical treatment.The patients' age,sex,tumor location,depth of invasion,pathological type,lymph node metastasis,and pathological stage were determined by a review of the medical records.Expression of HER2 was analyzed by immunohistochemistry(IHC) using the HercepTest TM kit.Standard criteria for HER2 positivity(0,1+,2+,and 3+) were used.Tumors that scored 3+ were considered HER2-positive.Expression of phospho Akt(pAkt) was also analyzed by IHC.Tumors were considered pAkt-positive when the percentage of positive tumor cells was 10% or more.PI3K,catalytic,alpha polypeptide(PIK3CA) mutations in exons 1,9 and 20 were analyzed by pyrosequencing.Epstein-Barr virus(EBV) infection was analyzed by in situ hybridization targeting EBV-encoded small RNA(EBER) with an EBER-RNA probe.Microsatellite instability(MSI) was analyzed by polymerase chain reaction using the mononucleotide markers BAT25 and BAT26.RESULTS:HER2 expression levels of 0,1+,2+ and 3+ were found in 167(72%),32(14%),12(5%) and 20(8.7%) samples,respectively.HER2 overexpression(IHC 3+) significantly correlated with intestinal histological type(15/20 vs 98 /205,P = 0.05).PIK3CA mutations were present in 20 cases(8.7%) and significantly correlated with MSI(10/20 vs 9/211,P < 0.01).The mutation frequency was high(21%) in T4 cancers and very low(6%) in T2 cancers.Mutations in exons 1,9 and 20 were detected in 5(2%),9(4%) and 7(3%) cases,respectively.Two new types of PIK3CA mutation,R88Q and R108H,were found in exon1.All PIK3CA mutations were heterozygous missense singlebase substitutions,the most common being H1047R(6/20,30%) in exon20.Eighteen cancers(8%) were EBV-positive and this positivity significantly correlated with a diffuse histological type(13/18 vs 93/198,P = 0.04).There were 7 cases of lymphoepithelioma-like carcinomas(LELC) and 6 of those cases were EBV-positive(percent/EBV:6/18,33%;percent/all LELC:6/7,86%).pAkt expression was positive in 119(53%) cases but showed no correlation with clinicopathological characteristics.pAkt expression was significantly correlated with HER2 overexpression(16/20 vs 103/211,P < 0.01) but not with PIK3CA mutations(12/20 vs 107/211,P = 0.37) or EBV infection(8/18 vs 103/211,P = 0.69).The frequency of pAkt expression was higher in cancers with exon20 mutations(100%) than in those with exon1(40%) or exon9(56%) mutations.One case showed both HER2 overexpression and EBV infection and 3 cases showed both PIK3CA mutations and EBV infection.However,no cases showed both PIK3CA mutations and HER2 overexpression.One EBVpositive cancer with PIK3CA mutation(H1047R) was MSI-positive.Three of these 4 cases were positive for pAkt expression.In survival analysis,pAkt expression significantly correlated with a poor prognosis(hazard ratio 1.75;95%CI:1.12-2.80,P = 0.02).CONCLUSION:HER2 expression,PIK3CA mutations and EBV infection in gastric cancer were characterized.pAkt expression significantly correlates with HER2 expression and with a poor prognosis. | Yasutaka Sukawa Hiroyuki Yamamoto Katsuhiko Nosho Hiroaki Kunimoto Hiromu Suzuki Yasushi Adachi Mayumi Nakazawa Takayuki Nobuoka Mariko Kawayama Masashi Mikami Takashi Matsuno Tadashi Hasegawa Koichi Hirata Kohzoh Imai Yasuhisa Shinomura | 2012 | World Journal of Gastroenterology2012，18，45： | 19 |
| 2 | Hepatic steatosis as a possible risk factor for the development of hepatocellular carcinoma after eradication of hepatitis C virus with antiviral therapy in patients with chronic hepatitis C显示文摘AIM: To elucidate risk factors contributing to the development of hepatocellular carcinoma (HCC) among patients with sustained viral response (SVR) after interferon (IFN) treatment and to examine whether HCV-RNA still remained in the liver of SVR patients who developed HCC. METHODS: Two-hundred and sixty-six patients, who achieved SVR, were enrolled in this study. We retrospectively reviewed clinical, viral and histological features of the patients, and examined whether the development of HCC depends on several clinical variables using Kaplan-Meier Method. RT-PCR was used to seek HCV-RNA in 3 out of 7 patients in whom liver tissue was available for molecular analysis. RESULTS: Among the enrolled 266 patients with SVR, HCC developed in 7 patients (7/266; 2.6%). We failed to detect HCV-RNA both in cancer and non-cancerous liver tissue in all three patients. The cumulative incidence for HCC was significantly different depending on hepatic fibrosis (F3-4) (P = 0.0028), hepatic steatosis (Grade 2-3) (P = 0.0002) and age (≥ 55) (P = 0.021) at the pre-interferon treatment. CONCLUSION: The current study demonstrated that age, hepatic fibrosis, and hepatic steatosis at pre- interferon treatment might be risk factors for developing HCC after SVR. | Atsushi Tanaka Satoko Uegaki Hiroko Kurihara Kiyoshi Aida Masaki Mikami Ikuo Nagashima Junji Shiga Hajime Takikawa | 2007 | World Journal of Gastroenterology2007，13，39： | 12 |
| 3 | DOG1 is useful for diagnosis of KIT-negative gastrointestinal stromal tumor of stomach显示文摘Approximately 80%-95%of gastrointestinal stromal tumors(GISTs)show positive staining for KIT,while the other 5%-20%show negative staining.If the tumor is negative for KIT,but is positive for CD34,a histological diagnosis is possible.However,if the tumor is negative for KIT,CD34,S-100,and SMA,a definitive diagnosis is often challenging.Recently,Discovered on GIST-1(DOG1)has received considerable attention as a useful molecule for the diagnosis of GIST.DOG1,a membrane channel protein,is known to be overexpressed in GIST.Because the sensitivity and specificity of DOG1 are higher than those of KIT,positive staining for DOG1has been reported,even in KIT-negative GISTs.KITnegative GISTs most commonly arise in the stomach and are mainly characterized by epithelioid features histologically.We describe our experience with a rare case of a KIT-negative GIST of the stomach that was diagnosed by positive immunohistochemical staining for DOG1 in a patient who presented with severe anemia.Our findings suggest that immunohistochemical staining for DOG1,in addition to gene analysis,is useful for the diagnosis of KIT-negative tumors that are suspected to be GISTs. | Takuya Wada Satoshi Tanabe Kenji Ishido Katsuhiko Higuchi Tohru Sasaki Chikatoshi Katada Mizutomo Azuma Akira Naruke Myunguchul Kim Wasaburo Koizumi Tetsuo Mikami | 2013 | World Journal of Gastroenterology2013，19，47： | 11 |
| 4 | Endoscopic papillary large balloon dilation for removal of bile duct stones显示文摘AIM:To investigate the efficacy and outcomes of endoscopic papillary large balloon dilation(EPLBD)for bile duct stones in a multicenter prospective study.METHODS:Lithotomy by EPLBD was conducted in 124patients with bile duct stones≥13 mm in size or with three or more bile duct stones≥10 mm.After endoscopic sphincterotomy,the papilla was dilated using balloons 12-20 mm in diameter fitting the bile duct diameter.RESULTS:The success rate of first-time lithotomy was 86.3%(107/124)and the final lithotomy success rate was 100%(124/124).Lithotripsy was needed in10 of the 124(13.6%)patients.Adverse events due to the treatment procedure occurred in 6(4.8%)patients,all of which were mild.Performing large balloon dilation after endoscopic sphincterotomy in patients with large stones or multiple stones in the bile duct is considered to ensure the safety of treatment and to reduce the need for lithotripsy.CONCLUSION:It is suggested that treatment by EPLBD for large bile duct stones may be safe and useful. | Yuji Sakai Toshio Tsuyuguchi Yoshiaki Kawaguchi Nobuto Hirata So Nakaji Katsuya Kitamura Shigeru Mikami Tatsuya Fujimoto Masashi Ijima Eishin Kurihara Shuhei Oana Takayoshi Nishino Ryo Tamura Dai Sakamoto Masato Nakamura Takao Nishikawa Harutoshi Sugiyama Hitoshi Yoshida Tetsuya Mine Osamu Yokosuka | 2014 | World Journal of Gastroenterology2014，20，45： | 6 |
| 5 | The utility of diffusion-weighted MR imaging for differentiating uterine sarcomas from benign leiomyomas显示文摘 | Ken Tamai Takashi Koyama Tsuneo Saga Nobuko Morisawa Koji Fujimoto Yoshiki Mikami Kaori Togashi | 2008 | European Radiology2008，，4： | 6 |
| 6 | Delayed perforation after endoscopic submucosal dissection for early gastric cancer: Clinical features and treatment显示文摘Perforation is an important procedural complication of endoscopic submucosal dissection(ESD) for early gastric cancer. Although the incidence of delayed perforation after ESD is low, extreme caution is necessary because many cases require surgical intervention. Among 1984 lesions of early gastric cancer treated in our hospital by ESD in 1588 patients from September 2002 through March 2015, delayed perforation developed in 4 patients(4 lesions, 0.25%). A diagnosis of delayed perforation requires prompt action, including surgical intervention when required. | Takafumi Yano Satoshi Tanabe Kenji Ishido Mizutomo Azuma Takuya Wada Mizuto Suzuki Natsuko Kawanishi Sakiko Yamane Tohru Sasaki Chikatoshi Katada Tetsuo Mikami Natsuya Katada Wasaburo Koizumi | 2016 | World Journal of Gastrointestinal Endoscopy2016，8，8： | 4 |
| 7 | Survival of geriatric patients after percutaneous endoscopic gastrostomy in Japan显示文摘AIM: To examine the long term survival of geriatric patients treated with percutaneous endoscopic gastrostomy (PEG) in Japan. METHODS: We retrospectively included 46 Japanese community and tertiary hospitals to investigate 931 consecutive geriatric patients (≥ 65 years old) with swallowing difficulty and newly performed PEG between Jan 1st 2005 and Dec 31st 2008. We set death as an outcome and explored the associations among patient’s characteristics at PEG using log-rank tests and Cox proportional hazard models. RESULTS: Nine hundred and thirty one patients were followed up for a median of 468 d. A total of 502 deaths were observed (mortality 53%). However, 99%, 95%, 88%, 75% and 66% of 931 patients survived more than 7, 30, 60 d, a half year and one year, respectively. In addition, 50% and 25% of the patients survived 753 and 1647 d, respectively. Eight deaths were considered as PEG-related, and were associated with lower serum albumin levels (P = 0.002). On the other hand, among 28 surviving patients (6.5%), PEG was removed. In a multivariate hazard model, older age [hazard ratio (HR), 1.02; 95% confidence interval (CI), 1.00-1.03; P = 0.009], higher C-reactive protein (HR, 1.04; 95% CI: 1.01-1.07; P = 0.005), and higher blood urea nitrogen (HR, 1.01; 95% CI: 1.00-1.02; P = 0.003) were significant poor prognostic factors, whereas higher albumin (HR, 0.67; 95% CI: 0.52-0.85; P = 0.001), female gender (HR, 0.60; 95% CI: 0.48-0.75; P < 0.001) and no previous history of ischemic heart disease (HR, 0.69; 95% CI: 0.54-0.88, P = 0.003) were markedly better prognostic factors. CONCLUSION: These results suggest that more than half of geriatric patients with PEG may survive longer than 2 years. The analysis elucidated prognostic factors. | Yutaka Suzuki Seryna Tamez Akihiko Murakami Akihiko Taira Akihiro Mizuhara Akira Horiuchi Chie Mihara Eiji Ako Hirohito Muramatsu Hitoshi Okano Hitoshi Suenaga Kazuaki Jomoto Junya Kobayashi Katsunari Takifuji Kazuhiro Akiyama Koh Tahara Koji Onishi Makoto Shimazaki Masami Matsumoto Masashi Ijima Masato Murakami Masato Nakahori Michiaki Kudo Michio Maruyama Mikako Takahashi Naohiro Washizawa Shigeru Onozawa Satoshi Goshi Satoyoshi Yamashita Shigeki Ono Shin Imazato Shinji Nishiwaki Shuichirou Kitahara Takao Endo Takao Iiri Takeshi Nagahama Takuto Hikichi Tatsuya Mikami Tetsuo Yamamoto Tetsushi Ogawa Tomoko Ogawa Tomoyuki Ohta Toshifumi Matsumoto Toshiroh Kura Tsutomu Kikuchi Tsuyoshi Iwase Tsuyotoshi Tsuji Yukio Nishiguchi Mitsuyoshi Urashima | 2010 | World Journal of Gastroenterology2010，16，40： | 4 |
| 8 | Mixed-histologic-type submucosal invasive gastric cancer as a risk factor for lymph node metastasis: feasibility of endoscopic submucosal dissection显示文摘 | N. Hanaoka S. Tanabe T. Mikami I. Okayasu K. Saigenji | 2009 | Endoscopy2009，，05： | 4 |
| 9 | Double-endoscope endoscopic submucosal dissection for the treatment of early gastric cancer accompanied by an ulcer scar (with video)显示文摘 | Katsuhiko Higuchi Satoshi Tanabe Mizutomo Azuma Tohru Sasaki Chikatoshi Katada Kenji Ishido Akira Naruke Tetuo Mikami Wasaburo Koizumi | 2013 | Gastrointestinal Endoscopy2013，，2： | 3 |
| 10 | Immune aspects of the pathogenesis of inflammatory bowel disease显示文摘 | Tadakazu Hisamatsu Takanori Kanai Yohei Mikami Kazuaki Yoneno Katsuyoshi Matsuoka Toshifumi Hibi | 2012 | Pharmacology and Therapeutics2012，，： | 3 |
| 11 | Endoscopic management of unresectable malignant gastroduodenal obstruction with a nitinol uncovered metal stent: a prospective Japanese multicenter study显示文摘AIM: To determine the safety and efficacy of endoscopic duodenal stent placement in patients with malignant gastric outlet obstruction.METHODS: This prospective, observational, multicenter study included 39 consecutive patients with malignant gastric outlet obstruction. All patients underwent endoscopic placement of a nitinol, uncovered, selfexpandable metal stent. The primary outcome was clinical success at 2 wk after stent placement that was defined as improvement in the Gastric Outlet Obstruction Scoring System score relative to the baseline.RESULTS: Technical success was achieved in all duodenal stent procedures. Procedure-related complications occurred in 4 patients(10.3%) in the form of mild pneumonitis. No other morbidities or mortalitieswere observed. The clinical success rate was 92.3%. The mean survival period after stent placement was 103 d. The mean period of stent patency was 149 d and the patency remained acceptable for the survival period. Stent dysfunction occurred in 3 patients(7.7%) on account of tumor growth.CONCLUSION: Endoscopic management using duodenal stents for patients with incurable malignant gastric outlet obstruction is safe and improved patients' quality of life. | Reina Sasaki Yuji Sakai Toshio Tsuyuguchi Takao Nishikawa Tatsuya Fujimoto Shigeru Mikami Harutoshi Sugiyama Osamu Yokosuka | 2016 | World Journal of Gastroenterology2016，22，14： | 2 |
| 12 | Overexpression of ETS-1 is associated with malignan' biological features of prostate cancer显示文摘E26 transformation-specific-1 ( ETS-1 ),一个 et 家庭抄写因素,被报导了在前列腺癌症( PCa )在 ETS-1 表示的许多生理、病理学的过程,而是临床的含意起一个重要作用,特别地高风险的案例,包括对雄激素剥夺的反应,治疗( ADT )还得被阐明。我们用针活体检视从 69 个主要先进的 PCa 病人获得的嵌入石蜡的前列腺癌织物染色的 immunohistochemical 检验了 ETS-1 的表示。ETS-1 表示与 69 个病人的 clinicopathological 特征相比,包括 25 作为主要治疗经历了 ADT。作为结果,有 ETS-1 的更高的表示的 PCa 病人是显著地,可能舞台高的更多得分(P< 0.05 ) 。在 ETS-1 表示和起始的前列腺特定的抗原(PSA ) 水平之间没有重要协会。在 ADT 对待的 25 个病人,为 ETS-1 的染色的分数显著地在 24 个月以内与阉割抵抗的疾病的快速的开发被联系(P< 0.05 ) ,而格利森分数和 PSA 水平不是。在结论,增加了 ETS-1 表示与到阉割抵抗的前进的一个更高的阶段,更高级的格利森分数和更短的时间被联系。这些数据建议为 ETS-1 的 immunostaining 能是为为 PCa 病人预言差的临床的结果的一个分子的标记,特别地那些与高风险的疾病。 | Bo Li Yosuke Shimizu Takashi Kobayashi Naoki Terada Koji Yoshimura Tomomi Kamba Yoshiki Mikami Takahiro Inoue Hiroyuki Nishiyama Osamu Ogawa | 2012 | Asian Journal of Andrology2012，14，6： | 2 |
| 13 | Topographical and hydrological effects on meso-scale vegetation in desert steppe, Mongolia显示文摘This study investigated the seasonal variations of the normalized difference vegetation index(NDVI) and its relationships with climatic variables and topography in a small-scale(20 km×20 km) area(i.e., Tsogt-Ovoo village) within the desert steppe zone of Mongolia using in-situ observed climate data and satellite remote sensing data. We found that the topography is very important for vegetation growth in the desert steppe although the summer precipitation is the constraining factor. The unexpectedly high NDVI(up to 0.56), as well as the high aboveground biomass, in the valley bottom was primarily resulted from the topography-modulated redistribution of overland flow after relatively heavy precipitation events during the growing season. This makes the valley bottoms in desert steppes not only reliable feeding resources for livestock but also heavens for wild lives. But, the detected large standard deviation of annual maximum NDVI(NDVI_(max)) from 2000 to 2013 in the valley bottom in response to rather variable precipitation implies that the valley bottoms under desert steppe climates are more vulnerable to climatic change. | Batdelger GANTSETSEG Masahide ISHIZUKA Yasunori KUROSAKI Masao MIKAMI | 2017 | Journal of Arid Land2017，9，1： | 2 |
| 14 | Antitumor effect of hexa-N-acetylchitohexaose and chitohexaose显示文摘 | Suzuki K Mikami T Okawa Y | 1986 | Carbohydr Res1986，151，： | 2 |
| 15 | Transgastric endoscopic peritoneoscopy does not require decontamination of the stomach in humans显示文摘 | Vimal K. Narula Lynn C. Happel Kevin Volt Simon Bergman Jason C. Roland Rebecca Dettorre David B. Renton Kevin M. Reavis Bradley J. Needleman Dean J. Mikami E. Christopher Ellison W. Scott Melvin Jeffrey W. Hazey | 2009 | Surgical Endoscopy2009，，6： | 2 |
| 16 | 山区林地粗糙度的推求显示文摘应用实测资料计算复杂地面森林冠层的动量、潜热和粗糙参数以及动量总体输送系数(CM)、热量总体输送系数(CH)和水汽总体输送系数(CE)的参数。使用最大相关法计算本地风的粗糙度Z0M与零通量面d0M,同样结果较满意。在假设θS=θRAD的情况下计算水汽粗糙度Z0H,表明斯坦顿系数St-1=ln(Z0M/Z0H)/K比过去的调查结果大。温度的零通量计算结果为d0H=(11.9),该值与d0M值(=12.8)相近。通过修改后方程计算表面湿度参数α,表面湿度参数α的值为0.61,该值与冠层的相对湿度相近。因此α的值可以用冠层顶部的相对湿度来计算。计算森林区粗糙度的方法和模型可推广应用到黑河流域。 | 冯起 张艳武 苏永红 司建华 常宗强 席海洋 Mikami Masao | 2006 | 中国沙漠2006，26，6： | 2 |
| 17 | Transgastric instrumentation and bacterial contamination of the peritoneal cavity显示文摘 | Vimal K. Narula Jeffrey W. Hazey David B. Renton Kevin M. Reavis Christopher M. Paul Kristen E. Hinshaw Bradley J. Needleman Dean J. Mikami E. Christopher Ellison W. Scott Melvin | 2008 | Surgical Endoscopy2008，，3： | 2 |
| 18 | Natural orifice surgery: initial US experience utilizing the StomaphyXTM device to reduce gastric pouches after Roux-en-Y gastric bypass显示文摘 | Dean Mikami Bradley Needleman Vimal Narula Janice Durant W. Scott Melvin | 2010 | Surgical Endoscopy2010，，1： | 2 |
| 19 | 在有固执地正常的丙氨酸 aminotransferase 的丙肝病毒病人的 IL-28B 多型性和治疗反应显示文摘 AIM:To examine the association between the interleukin 28B(IL-28B)genotype and treatment response in hepatitis C virus(HCV)-infected patients with persistently normal alanine aminotransferase(PNALT).METHODS:We compared the treatment response of HCV-infected patients with PNALT to that of patients with non-PNALT.Between February 2010 and April2013,278 patients infected with HCV were enrolled in this study.All of the patients were treated with peginterferon-alpha 2a or 2b plus ribavirin.In addition,180μg of peginterferon alpha-2a or 1.5μg/kg peginterferon alpha-2b per week plus weight-based ribavirin(600-1000 mg/d)were typically administered for 24 wk to HCV genotype 2-infected patients or for 48-72 wk to HCV genotype 1-infected patients.In all of the patients,the IL-28B rs8099917 genotype was determined using a TaqMan single-nucleotide polymorphism assay.HCV RNA was measured using the COBAS TaqMan HCV test.RESULTS:Female patients were dominant in the PNALT group(P<0.0001).Among 72 HCV genotype 1-infected patients with PNALT,the early virologic response(EVR)rates(P<0.01)and the sustained virologic response(SVR)rates(P<0.01)were higher in patients with the IL-28B TT genotype than in those with the IL-28B TG/GG genotype.In HCV genotype 1-infected patients with PNALT,multivariate logistic-regression analysis showed that SVR was independently predicted by the IL-28B rs8099917 TT type(P<0.05)and having an EVR(P<0.01).The IL-28B rs8099917 TT genotype strongly correlated with treatment response in HCV genotype 1-infected Asian patients with PNALT.CONCLUSION:The IL-28B genotype may be useful for selecting HCV genotype 1-infected patients with PNALT who should receive interferon-based treatment. | Tatsuo Miyamura Tatsuo Kanda Masato Nakamura Xia Jiang Shuang Wu Shingo Nakamoto Shigeru Mikami Nobuo Takada Fumio Imazeki Osamu Yokosuka | 2013 | World Journal of Hepatology2013，5，11： | 2 |
| 20 | Inpatient burden of childhood functional GI disorders in the USA: an analysis of national trends in the USA from 1997 to 2009显示文摘 | R. Park S. Mikami J. LeClair A. Bollom C. Lembo S. Sethi A. Lembo M. Jones V. Cheng E. Friedlander S. Nurko | 2015 | Neurogastroenterol. Motil2015，，5： | 2 |
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