维普中文期刊产品整合服务
426篇 您的检索式:作者名="SAMUEL K"
    题名 作者 年代 出处 被引量
1XRCC1 and DNA polymerase β in cellular protection against cytotoxic DNA single-strand breaks显示文摘Julie K Horton Mary Watson Donna F Stefanick Daniel T Shaughnessy Jack A Taylor Samuel H Wilson 2008Cell Research2008,18,1:17
2大气二氧化氮与每日总死亡率、心血管和呼吸系统疾病死亡率的短期关联:398个城市的多中心分析显示文摘目的:采用统一的分析方案,评估全球多个国家/地区的二氧化氮(NO_(2))与总死亡率、心血管和呼吸系统疾病死亡率之间的短期关联。研究设计:采用两阶段的时间序列分析方法、过度离散的广义线性模型和多水平meta分析。研究地点:22个低到高收入国家/地区的398个城市。主要结局指标:1973—2018年逐日总死亡人数(6280万人)、心血管疾病死亡人数(1970万人)和呼吸系统疾病死亡人数(550万人)。结果:平均而言,NO_(2)浓度在滞后1天(前1天)每增加10μg/m^(3),会导致总死亡率、心血管和呼吸系统疾病死亡率分别增加0.46%(95%可信区间0.36%~0.57%)、0.37%(0.22%~0.51%)、0.47%(0.21%~0.72%)。在对共污染物(PM_(10)、PM_(2.5)、臭氧、二氧化硫和一氧化碳)进行调整后,这些关联仍然很稳定。所有3种死因的暴露-反应曲线几乎是线性的,没有明显的阈值。在398个城市中,可归因于高过假定零水平的NO_(2)浓度造成的死亡比例为1.23%(95%可信区间0.96%~1.51%)。结论:这项多中心研究提供了关于NO_(2)短期暴露与总死亡率、心血管和呼吸系统死亡风险之间的独立和线性关联的关键证据,说明通过加强NO_(2)的控制和监管限制标准,可获得人群水平的健康收益。孟夏 刘聪(校) 陈仁杰 郑湃(译) 阚海东(校) Francesco Sera Ana Vicedo-Cabrera Ai Milojevic Maria Guo Yuming Tong Shilu Micheline de Sousa Zanotti Stagliorio Coelh Paulo Hilario Nascimento Saldiva Eric Lavigne Patricia Matus Correa Nicolas Valdes Ortega Samuel Osorio Garcia Jan Kysely Ales Urban Hans Orru Marek Maasikmets Jouni J K Jaakkola Niilo Ryti Veronika Huber Alexandra Schneider Klea Katsouyanni Antonis Analitis Masahiro Hashizume Yasushi Honda Chris Fook Sheng Ng Baltazar Nunes João Paulo Teixeira Iulian Horia Holobaca Simona Fratianni Ho Kim Aurelio Tobias Carmeníniguez Bertil Forsberg ChristoferÅström Martina S Ragettli Yue-Liang Leon Guo Shih-Chun Pan Shanshan Li Michelle L Bell Antonella Zanobetti Joel Schwartz Tangchun Wu Antonio Gasparrini 2021英国医学杂志中文版2021,24,8:7
3Liver resections can be performed safely without Pringle maneuver: A prospective study显示文摘AIM To evaluate liver resections without Pringle maneuver, i.e., clamping of the portal triad. METHODS Between 9/2002 and 7/2013, 175 consecutive liver resections(n = 101 major anatomical and n = 74 large atypical > 5 cm) without Pringle maneuver were performed in 127 patients(143 surgeries). Accompanying, 37 wedge resections(specimens < 5 cm) and 43 radiofrequency ablations were performed. Preoperative volumetric calculation of the liver remnant preceeded all anatomical resections. The liver parenchyma was dissected by waterjet. The median central venous pressure was 4 mmH g(range: 5-14). Data was collected prospectively. RESULTS The median age of patients was 60 years(range: 16-85). Preoperative chemotherapy was used in 70 cases(49.0%). Liver cirrhosis was present in 6.3%, and liver steatosis of ≥ 10% in 28.0%. Blood loss was median 400 mL(range 50-5000 mL). Perioperative blood transfusions were given in 22/143 procedures(15%). The median weight of anatomically resected liver specimens was 525 g(range: 51-1850 g). One patient died postoperatively. Biliary leakages(n = 5) were treated conservatively. Temporary liver failure occurred in two patients.CONCLUSION Major liver resections without Pringle maneuver are feasible and safe. The avoidance of liver inflow clamping might reduce liver damage and failure, and shorten the hospital stay.Christoph A Maurer Mikolaj Walensi Samuel A Kaser Beat M Künzli Rene Lotscher Anne Zuse 2016World Journal of Hepatology2016,8,24:6
4Primary squamous cell carcinoma of the rectum: An update and implications for treatment显示文摘AIM: To provide an update on the aetiology, pathogenesis, diagnosis, staging and management of rectal squamous cell carcinoma(SCC).METHODS: A systematic review was conducted according to the preferred reporting items for Systematic Reviews and Meta-Analyses guidelines. A comprehensive search of Ovid MEDLINE was performed with the reference list of selected articles reviewed to ensure all relevant publications were captured. The search strategy was limited to the English language, spanning from 1946 to 2015. A qualitative analysis was undertaken examining patient demographics, clinical presentation, diagnosis, staging, treatment and outcome. The quantitaive analysis was limited to data extracted on treatment and outcomes including radiological, clinical and pathological complete response where available. The narrative and quantitative review were synthesised in concert.RESULTS: The search identified 487 articles in total with 79 included in the qualitative review. The quantitative analysis involved 63 articles, consisting of 43 case reports and 20 case series with a total of 142 individual cases. The underlying pathogenesis of rectal SCC while unclear, continues to be defined, with increasing evidence of a metaplasia-dysplasia-carcinoma sequence and a possible role for human papilloma virus in this progression. The presentation is similar to rectal adenocarcinoma, with a diagnosis confirmed by endoscopic biopsy. Many presumed rectal SCC's are in fact an extension of an anal SCC, and cytokeratin markers are a useful adjunct in this distinction. Staging is most accurately reflected by the tumour-nodemetastasis classification for rectal adenocarcinoma. It involves examining locoregional disease by way of magnetic resonance imaging and/or endorectal ultrasound, with systemic spread excluded by way of computed tomography. Positron emission tomography is integral in the workup to exclude an external siteof primary SCC with metastasis to the rectum. While the optimal treatment remains as yet undefined, recent studies have demonstrated a global shift away from surgery towards definitive chemoradiotherapy as primary treatment. Pooled overall survival was calculated to be 86% in patients managed with chemoradiation compared with 48% for those treated traditionally with surgery. Furthermore, local recurrence and metastatic rates were 25% vs 10% and 30% vs 13% for the chemoradiation vs conventional treatment cohorts.CONCLUSION: The changing paradigm in the treatment of rectal SCC holds great promise for improved outcomes in this rare disease.Glen R Guerra Cherng H Kong Satish K Warrier Andrew C Lynch Alexander G Heriot Samuel Y Ngan 2016World Journal of Gastrointestinal Surgery2016,8,3:5
5Membrane-bound mucins and mucin terminal glycans expression in idiopathic or Helicobacter pylori, NSAID associated peptic ulcers显示文摘AIM:To determine the expression of membrane-bound mucins and glycan side chain sialic acids in Helicobacter pylori(H.pylori)-associated,non-steroidal inflammatory drug(NSAID)-associated and idiopathic-gastric ulcers.METHODS:We studied a cohort of randomly selected patients with H.pylori(group 1,n=30),NSAID(group 2,n=18),combined H.pylori and NSAID associated gastric ulcers(group 3,n=24),and patients with idiopathic gastric ulcers(group 4,n=20).Immunohistochemistry for MUC1,MUC4,MUC17,and staining for Erythrina cristagalli agglutinin and Sambucus nigra agglutinin(SNA)lectins was performed on sections from the ulcer margins.RESULTS:Staining intensity of MUC17 was higher in H.pylori ulcers(group 1)than in idiopathic ulcers(group4),11.05±3.67 vs 6.93±4.00 for foveola cells,and10.29±4.67 vs 8.00±3.48 for gland cells,respectively(P<0.0001).In contrast,MUC1 expression was higher in group 4 compared group 1,9.89±4.17 vs 2.93±5.13 in foveola cells and 7.63±4.60 vs 2.57±4.50 for glands,respectively(P<0.0001).SNA lectin staining was increased in group 4,in parallel to elevated MUC1expression,indicating more abundantα2-6 sialylation in that group.CONCLUSION:Cytoplasmic MUC17 staining was sig-nificantly decreased in the cases with idiopathic ulcer.The opposite was observed for both MUC1 and SNA lectin.This observation may reflect important pathogenic mechanisms,since different mucins with altered sialylation patterns may differ in their protection efficiency against acid and pepsin.Yaron Niv Doron Boltin Marisa Halpern Miriam Cohen Zohar Levi Alex Vilkin Sara Morgenstern Vahig Manugian Erica St Lawrence Pascal Gagneux Sukhwinder Kaur Poonam Sharma Surinder K Batra Samuel B Ho 2014World Journal of Gastroenterology2014,20,40:5
6Effects of radiotherapy with concomitant and adjuvant temozolomide versus radiotherapy alone on survival in glioblastoma in a randomised phase III study: 5-year analysis of the EORTC-NCIC trial显示文摘Roger Stupp Monika E Hegi Warren P Mason Martin J van den Bent Martin JB Taphoorn Robert C Janzer Samuel K Ludwin Anouk Allgeier Barbara Fisher Karl Belanger Peter Hau Alba A Brandes Johanna Gijtenbeek Christine Marosi Charles J Vecht Karima Mokhtari Piet 2009Lancet Oncology2009,,5:4
7Disagreement between symptom-reflux association analysis parameters in pediatric gastroesophageal reflux disease investigation显示文摘AIM: To assess the agreement within 3 commonly used symptom-reflux association analysis (SAA) parameters investigating gastroesophageal reflux disease (GERD) in infants. METHODS: Twenty three infants with suspected GERD were included in this study. Symptom index (SI), Symptom sensitivity index (SSI) and symptom association probability (SAP) related to cough and irritability were calculated after 24 h combined pH/multiple intraluminal impedance (MII) monitoring. Through defined cutoff values, SI, SSI and SAP values are differentiated in normal and abnormal, whereas abnormal values point towards gastroesophageal reflux (GER) as the origin of symptoms. We analyzed the correlation and the concordance of the diagnostic classification of these 3 SAA parameters.RESULTS: Evaluating the GER-irritability association, SI, SSI and SAP showed non-identical classification of normal and abnormal cases in 39.2% of the infants. When irritability was taken as a symptom, there was only a poor inter-parameter association between SI and SSI, and between SI and SAP (Kendall’s tau b = 0.37, P < 0.05; Kendall’s tau b = 0.36, P < 0.05, respectively). Evaluating the GER-cough association, SI, SSI and SAP showed non-identical classification of normal and abnormal cases in 52.2% of the patients. When cough was taken as a symptom, only SI and SSI showed a poor inter-parameter association (Kendall’s tau b = 0.33, P < 0.05). CONCLUSION: In infants investigated for suspected GERD with pH/MII-monitoring, SI, SSI and SAP showed a poor inter-parameter association and important dis-agreements in diagnostic classification. These limitations must be taken into consideration when interpreting the results of SAA in infants.Samuel C Lüthold Mascha K Rochat Peter Bhler 2010World Journal of Gastroenterology2010,16,19:3
8Rice Drying,Storage and Processing:Effects of Post-Harvest Operations on Grain Quality显示文摘Various post-harvest processes of rice are commonly employed,especially during the off-season,to ensure its consumption feasibility,which often affect the grain quality.Different forms of drying,storage and processing of rice are evaluated to identify their effects on grain quality.Microwave drying has emerged as an alternative to the widely-used intermittent-drying and fixed-bed-dryer methods of drying paddy rice.Control of drying-air temperatures(between 40℃ and 60℃)according to the rice variety can improve quality,especially for exotic varieties.Keeping stored grain in hygroscopic balance,with water content between 11%to 15%,at temperatures between 16℃ and 20℃ and with intergranular relative humidity near 60%,allows 12 months of storage in a controlled environment without significant deterioration.Other innovations,notably the application of artificial refrigeration to grain stored in bulk in vertical cylindrical silos and the use of impermeable packaging for storage,ensure the conservation of grain mass.The different stages and equipments used to obtain polished,brown and parboiled rice result in significant changes in the nutritional value of rice because of the removal of the outermost layers of the grains.Polishing reduces the nutritional value and physical homogeneity of rice.Brown rice retains more bioactive compounds and nutrients because it does not lose the outer layer of the grains in the polishing processes.Parboiled rice,although less nutritious than brown rice,has better grain integrity and milling yield and less loss of nutrients than white rice.Amanda MÜLLER Marcela Trojahn NUNES Vanessa MALDANER Paulo Carteri CORADI Rosana Santos de MORAES Samuel MARTENS Andressa Fernandes LEAL Vladison Fogliato PEREIRA Cristielle König MARIN 2022Rice science2022,29,1:3
9Heat shock protein 90 inhibition by 17-DMAG lessens disease in the MRL/Ipr mouse model of systemic lupus erythematosus显示文摘热吃惊蛋白质 90 的提高的表示(HSP90 ) 在全身的豺狼座 erythematosus (SLE ) 的肾和浆液被发现了病人和 MRL/Mp-Fas lpr /Fas lpr (MRL/lpr ) 自体免疫的老鼠。如果 HSP90 的抑制将在 MRL/lpr 老鼠减少疾病,我们调查了。在在 vivo 的 vitro,有在 IL-6 的有免疫力刺激的显示出的减少的表示以前的 HSP90 禁止者 Geldanamycin 的 mesangial 房间的预告的处理, IL-12 和号码,我们发现当与 C57BL/6 相比鼠标和 MRL/lpr 鼠标与 HSP90 禁止者 17-DMAG 对待时, HSP90 表示在 MRL/lpr 肾被提高。与 17-DMAG 对待的 MRL/lpr 老鼠显示出减少的 proteinuria 并且减少了浆液 anti-dsDNA 抗体生产。Glomerulonephritis 和 glomerular IgG 和 C3 没被 17-DMAG 的管理显著地在 MRL/lpr 影响。17-DMAG 增加了 CD8 + T 房间,减少的双 negative T 房间,减少 CD4/CD8 比率和减少的小囊的 B 房间。这些研究建议 HSP90 可以在调整 T 房间区别和激活起一个作用并且 HSP90 抑制可以在豺狼座减少发炎。Samuel K Shimp III Cristen B Chafin Nicole L Regna Sarah E Hammond Molly A Read David L Caudell Marissa Nichole Rylander Christopher M Reilly 2012Cellular & Molecular Immunology2012,9,3:3
10Prolonged feeding with guanidinoacetate, a methyl group consumer, exacerbates ethanol-induced liver injury显示文摘AIM To investigate the hypothesis that exposure to guanidinoacetate(GAA, a potent methyl-group consumer) either alone or combined with ethanol intake for a prolonged period of time would cause more advanced liver pathology thus identifying methylation defects as the initiator and stimulator for progressive liver damage.METHODS Adult male Wistar rats were fed the control or ethanolLieber De Carli diet in the absence or presence of GAA supplementation. At the end of 6 wk of the feeding regimen, various biochemical and histological analyses were conducted. RESULTS Contrary to our expectations, we observed that GAA treatment alone resulted in a histologically normal liver without evidence of hepatosteatosis despite persistence of some abnormal biochemical parameters. This protection could result from the generation of creatine from the ingested GAA. Ethanol treatment for 6 wk exhibited changes in liver methionine metabolism and persistence of histological and biochemical defects as reported before. Further, when the rats were fed the GAA-supplemented ethanol diet, similar histological and biochemical changes as observed after 2 wk of combined treatment, including inflammation, macroand micro-vesicular steatosis and a marked decrease in the methylation index were noted. In addition, rats on the combined treatment exhibited increased liver toxicity and even early fibrotic changes in a subset of animals in this group. The worsening liver pathology could be related to the profound reduction in the hepatic methylation index, an increased accumulation of GAA and the inability of creatine generated to exert its hepato-protective effects in the setting of ethanol.CONCLUSION To conclude, prolonged exposure to a methyl consumer superimposed on chronic ethanol consumption causes persistent and pronounced liver damage.Natalia A Osna Dan Feng Murali Ganesan Priya F Maillacheruvu David J Orlicky Samuel W French Dean J Tuma Kusum K Kharbanda 2016World Journal of Gastroenterology2016,22,38:2
11Effectiveness of Helicobacter pylori eradication in the treatment of early-stage gastric mucosa-associated lymphoid tissue lymphoma:An up-to-date meta-analysis显示文摘BACKGROUND Gastric mucosa-associated lymphoid tissue(MALT)lymphoma(GML)is usually a low-grade B-cell neoplasia strongly associated with Helicobacter pylori(H.pylori)-induced chronic gastritis.Clinical practice guidelines currently recommend H.pylori eradication as the preferred initial treatment for early-stage GML.To determine the practical effect of bacterial eradication as the sole initial therapy for early-stage GML,an updated analysis and review of available evidence is imperative.AIM To perform a meta-analysis to assess the rate of complete remission(CR)of H.pylori-positive early-stage GML following bacterial eradication.METHODS We performed independent,computer-assisted literature searches using the PubMed/MEDLINE,Embase,and Cochrane Central databases through September 2022.Prospective and retrospective observational studies evaluating the CR of early-stage GML following bacterial eradication in H.pylori-positive patients.The risk of bias was assessed using Joanna Briggs Institute(JBI)Critical Appraisal Tools.The pooled estimate of the complete histopathological remission rate and respective confidence intervals(95%CI)were calculated following the random-effects model.Heterogeneity and inconsistency were assessed using Cochran’s Q test and I2 statistic,and heterogeneity was defined as P<0.01 and I²>50%,respectively.Subgroup and meta-regression analyses were conducted to explore potential sources of heterogeneity.RESULTS The titles and abstracts of 1576 studies were screened;96 articles were retrieved and selected for full-text reading.Finally,61 studies were included in the proportional meta-analysis(P-MA).Forty-six were prospective and fifteen were retrospective uncontrolled,single-arm,observational studies.The overall risk of bias was low to moderate in all but a single report,with an average critical appraisal score across all studies of 79.02%.A total of 2936 H.pylori-positive early-stage GML patients,in whom H.pylori was successfully eradicated,were included in the analysis.The pooled CR of H.pylori-positive early-stage GML after bacterial eradication was 75.18%(95%CI:70.45%-79.91%).P-MA indicated the substantial heterogeneity in CR reported across studies(I2=92%;P<0.01).Meta-regression analysis identified statistically significant effect modifiers,including the proportion of patients with t(11;18)(q21;q21)-positive GML and the risk of bias in each study.CONCLUSION Comprehensive synthesis of available evidence suggests that H.pylori eradication is effective as the sole initial therapy for early-stage GML.Although the substantial heterogeneity observed across studies limits the interpretation of the pooled overall CR,the present study is a relevant to informing clinical practice.Fabian Fellipe Bueno Lemos Caroline Tianeze de Castro Mariana Santos Calmon Marcel Silva Luz Samuel Luca Rocha Pinheiro Clara Faria Souza Mendes dos Santos Gabriel Lima Correa Santos Hanna Santos Marques Henrique Affonso Delgado Kádima Nayara Teixeira Cláudio Lima Souza Márcio Vasconcelos Oliveira Fabrício Freire de Melo 2023World Journal of Gastroenterology2023,29,14:2
12Medical training fails to prepare providers to care for patients with chronic hepatitis B infection显示文摘AIM: To investigate physicians' knowledge including chronic hepatitis B(CHB) diagnosis, screening, and management in various stages of their training.METHODS: A voluntary 20-question survey was administered in Santa Clara County, CA where Asian and Pacific Islanders(API) account for a third of the population. Among the 219 physician participants,there were 63 interns, 60 second-year residents, 26 chief residents and 70 attending physicians. The survey asked questions regarding respondents' demographics,general hepatitis B virus knowledge questions(i.e.,transmission, prevalence, diagnostic testing, prevention,and treatment options), as well as, self-reported practice behavior and confidence in knowledge.RESULTS: Knowledge about screening and managing patients with CHB was poor: only 24% identified the correct tests to screen for CHB, 13% knew the next steps for patients testing positive for CHB, 18% knew the high prevalence rate among API, and 31% knew how to screen for liver cancer. Wald chi-square analysis determined the effect of training level on knowledge; in all cases except for knowledge of liver cancer screening(p = 0.0032), knowledge did not significantly increase with length in residency training or completion of residency.CONCLUSION: Even in a high-risk region, both medical school and residency training have not adequatelyprepared physicians in the screening and management of CHB.Stephanie D Chao Bing-Mei Wang Ellen T Chang Li Ma Samuel K So 2015World Journal of Gastroenterology2015,21,22:2
13Inhibition of Mast Cell Leukotriene Release by Thiourea Derivatives显示文摘Venkatachalam T K Qazi S Samuel P 2003Bioorg Med Chem Lett2003,13,:1
14Stereotactic radiosurgery for pediatric intracranial arteriovenous malformation显示文摘Matthew D Penny K Samuel F 2002J Neurosurg2002,97,:1
15Evalutation of cytokine gene expression in porcine spleen cells, peripheral blood mononuclear cells, and alveolar macrophages by competitive RT-PCR显示文摘In-Soo C Ellen W C Samuel K M 2002FEMS Immunol Med Microbiol2002,34,:1
16Change of images of South Korea among foreign tourists after the 2002 FIFA World Cup显示文摘Samuel S K Alastair M M 2005Tourism Management2005,26,2:1
17Pregnancy-associated thrombocytopenia: pathogenesis and management 显示文摘McCrae K R Samuels P Schreiber A D 1992Blood1992,80,:1
18Complexation of the antibiotic tetracycline with humic acid显示文摘Cheng G Karthikeyan K G Samuel D S 2007Chnmosphere2007,66,8:1
19cLAP1 localizes to the nuclear compartment and modulates the cell cycle 显示文摘Samuel T Okada K Hyer M 2005Cancer Res2005,65,:1
20Al partitioning patterns and root growth as related to Al sensitivity and Al tolerance in wheat 显示文摘SAMUELS T D KUCUKAKYUZ K RINCON-ZACHARY M 1997Plant Physiol1997,113,2:1
返回顶部 每页显示:
共22页 首页 上一页 第1页 下一页 末页 /22 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费