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429篇 您的检索式:作者名="Ian R"
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1Autoimmune liver serology:Current diagnostic and clinical challenges显示文摘Liver-related autoantibodies are crucial for the correct diagnosis and classification of autoimmune liver diseas-es(AiLD),namely autoimmune hepatitis types 1 and 2(AIH-1 and 2),primary biliary cirrhosis(PBC),and the sclerosing cholangitis variants in adults and children.AIH-1 is specified by anti-nuclear antibody(ANA) and smooth muscle antibody(SMA).AIH-2 is specified by antibody to liver kidney microsomal antigen type-1(anti-LKM1) and anti-liver cytosol type 1(anti-LC1).SMA,ANA and anti-LKM antibodies can be present in de-novo AIH following liver transplantation.PBC is specified by antimitochondrial antibodies(AMA) react-ing with enzymes of the 2-oxo-acid dehydrogenase complexes(chiefly pyruvate dehydrogenase complex E2 subunit) and disease-specific ANA mainly react-ing with nuclear pore gp210 and nuclear body sp100.Sclerosing cholangitis presents as at least two variants,first the classical primary sclerosing cholangitis(PSC) mostly affecting adult men wherein the only(and non-specific) reactivity is an atypical perinuclear antineutro-phil cytoplasmic antibody(p-ANCA),also termed peri-nuclear anti-neutrophil nuclear antibodies(p-ANNA) and second the childhood disease called autoimmune sclerosing cholangitis(ASC) with serological features resembling those of type 1 AIH.Liver diagnostic serol-ogy is a fast-expanding area of investigation as new purified and recombinant autoantigens,and automatedtechnologies such as ELISAs and bead assays,become available to complement(or even compete with) tradi-tional immunofluorescence procedures.We survey for the first time global trends in quality assurance impact-ing as it does on(1) manufacturers/purveyors of kits and reagents,(2) diagnostic service laboratories that fulfill clinicians' requirements,and(3) the end-user,the physician providing patient care,who must properly interpret test results in the overall clinical context.Dimitrios P Bogdanos Diego Vergani Pietro Invernizzi Ian R Mackay 2008World Journal of Gastroenterology2008,14,21:40
2Computed tomography overestimation of esophageal tumor length: Implications for radiotherapy planning显示文摘AIM:To assess the relationship between preoperative computed tomography(CT)and postoperative pathological measurements of esophageal tumor length and the prognostic significance of CT tumor length data.METHODS:A retrospective study was carried out in 56 patients who underwent curative esophagogastrectomy.Tumor lengths were measured on the immediate preoperative CT and on the post-operative resection specimens.Inter-and intra-observer variations in CT measurements were assessed.Survival data were collected.RESULTS:There was a weak correlation between CT and pathological tumor length(r=0.30,P=0.025).CT lengths were longer than pathological lengths in 68%(38/56)of patients with a mean difference of 1.67 cm(95%CI:1.18-2.97).The mean difference in measurements by two radiologists was 0.39 cm(95% CI:-0.59-1.44).The mean difference between repeat CT measured tumor length(intra-observer variation) were 0.04 cm(95%CI:-0.59-0.66)and 0.47 cm (95%CI:-0.53-1.47).When stratified,patients not receiving neoadjuvant chemotherapy showed a strong correlation between CT and pathological tumor length(r =0.69,P=0.0014,n=37)than patients that did(r= 0.13,P=0.43,n=19).Median survival with CT tumor length>5.6 cm was poorer than with smaller tumors,but the difference was not statistically significant.CONCLUSION:Esophageal tumor length assessed using CT does not reflect pathological tumor extent and should not be the only modality used for management decisions,particularly for planning radiotherapy.Karim Sillah Luke R Williams Hans-Ulrich Laasch Azeem Saleem Gillian Watkins Susan A Pritchard Patricia M Price Catharine M West Ian M Welch 2010World Journal of Gastrointestinal Oncology2010,2,4:10
3Etiopathogenesis of primary biliary cirrhosis显示文摘Primary biliary cirrhosis(PBC) is an autoimmune disease of the liver characterized by progressive bile duct destruction eventually leading to cirrhosis and liver failure.The serological hallmark of the disease is the presence of circulating antimitochondrial antibodies(AMA).These reflect the presence of autoreactive T and B cells to the culprit antigens,the E2 subunits of mitochondrial 2-oxo-acid dehydrogenase enzymes,chiefly pyruvate dehydrogenase(PDC-E2).The disease results from a combination of genetic and environmental risk factors.Genetic predisposition is indicated by the higher familial incidence of the disease particularly among siblings and the high concordance rate among monozygotic twins.Environmental triggering events appear crucial to disrupt a pre-existing unstable immune tolerance of genetic origin allowing,after a long latency,the emergence of clinical disease.Initiating mimetopes of the vulnerable epitope of the PDC-E2 autoantigen can be derived from microbes that utilize the PDC enzyme or,alternatively,environmental xenobiotics/chemical compounds that modify the structure of native proteins to make them immunogenic.A further alternative as a source of antigen is PDC-E2 derived from apoptotic cells.In the effector phase the biliary ductular cell,by reason of itsproclivity to express the antigen PDC-E2 in the course of apoptosis,undergoes a multilineage immune attack comprised of CD4+ and CD8+ T cells and antibody.In this article,we critically review the available evidence on etiopathogenesis of PBC and present interpretations of complex data,new developments and theories,and nominate directions for future research.Ana Lleo Pietro Invernizzi Ian R Mackay Harry Prince Ren-Qian Zhong M Eric Gershwin 2008World Journal of Gastroenterology2008,14,21:9
4Panitumumab and irinotecan versus irinotecan alone for patients with KRAS wild-type, fluorouracil-resistant advanced colorectal cancer (PICCOLO): a prospectively stratified randomised trial显示文摘Matthew T Seymour Sarah R Brown Gary Middleton Timothy Maughan Susan Richman Stephen Gwyther Catherine Lowe Jennifer F Seligmann Jonathan Wadsley Nick Maisey Ian Chau Mark Hill Lesley Dawson Stephen Falk Ann O’Callaghan Kim Benstead Philip Chambers Alfred 2013Lancet Oncology2013,,8:6
5Test and prediction of chloride diffusion in recycled aggregate concrete显示文摘Recycled aggregate concrete(RAC) specimens with different recycled coarse aggregate replacement ratios by mass(R) are fully immersed in a 10% chloride solution for 235 days. Both free chloride concentration(Cf) and total chloride concentration(Ct) are then measured employing a rapid chloride test(RCT) system. The Fick's second diffusion law is verified by the test data and used to predict chloride concentration distribution at different immersion periods. Additionally, pore structures of the new and old mortar in RAC are tested by mercury intrusion porosimetry(MIP). It is found that binding chloride concentration(Cb) linearly increases with Cf. In natural aggregate concrete(NAC), Cf is obviously smaller than that in the RAC in the same testing environment and this is different from the test results of Ct and Cb. Furthermore, the effects of R on the chloride concentration of RAC become severe for specimens subjected to long immersion periods, which can be explained in terms of the pore structures of the new mortar and old adhesive mortar in RAC.XIAO Jian Zhuang YING Jing Wei TAM Vivian W.Y GILBERT Ian R 2014Science China(Technological Sciences)2014,57,12:5
6Refining pathological evaluation of neoadjuvant therapy for adenocarcinoma of the esophagus显示文摘AIM:To assess tumour regression grade(TRG)and lymph node downstaging to help define patients who benefit from neoadjuvant chemotherapy.METHODS:Two hundred and eighteen consecutive patients with adenocarcinoma of the esophagus or gastro-esophageal junction treated with surgery alone or neoadjuvant chemotherapy and surgery between 2005and 2011 at a single institution were reviewed.Triplet neoadjuvant chemotherapy consisting of platinum,fluoropyrimidine and anthracycline was considered for operable patients(World Health Organization performance status≤2)with clinical stage T2-4 N0-1.Response to neoadjuvant chemotherapy(NAC)was assessed using TRG,as described by Mandard et al.In addition lymph node downstaging was also assessed.Lymph node downstaging was defined by cN1 at diagnosis:assessed radiologically(computed tomography,positron emission tomography,endoscopic ultrasonography),then pathologically recorded as N0 after surgery;ypN0 if NAC given prior to surgery,or pN0if surgery alone.Patients were followed up for 5 years post surgery.Recurrence was defined radiologically,with or without pathological confirmation.An association was examined between t TRG and lymph node downstaging with disease free survival(DFS)and a comprehensive range of clinicopathological characteristics.RESULTS:Two hundred and eighteen patients underwent esophageal resection during the study interval with a mean follow up of 3 years(median follow up:2.552,95%CI:2.022-3.081).There was a 1.8%(n=4)inpatient mortality rate.One hundred and thirty-six(62.4%)patients received NAC,with 74.3%(n=101)of patients demonstrating some signs of pathological tumour regression(TRG 1-4)and 5.9%(n=8)having a complete pathological response.Forty four point one percent(n=60)had downstaging of their nodal disease(cN1 to ypN0),compared to only 15.9%(n=13)that underwent surgery alone(pre-operatively overstaged:cN1 to pN0),(P<0.0001).Response to NAC was associated with significantly increased DFS(mean DFS;TRG 1-2:5.1years,95%CI:4.6-5.6 vs TRG 3-5:2.8 years,95%CI:2.2-3.3,P<0.0001).Nodal down-staging conferred a significant DFS advantage for those patients with a poor primary tumour response to NAC(median DFS;TRG 3-5 and nodal down-staging:5.533 years,95%CI:3.558-7.531 vs TRG 3-5 and no nodal down-staging:1.114 years,95%CI:0.961-1.267,P<0.0001).CONCLUSION:Response to NAC in the primary tumour and in the lymph nodes are both independently associated with improved DFS.Fergus Noble Luke Nolan Adrian C Bateman James P Byrne Jamie J Kelly Ian S Bailey Donna M Sharland Charlotte N Rees Timothy J Iveson Tim J Underwood Andrew R Bateman 2013World Journal of Gastroenterology2013,19,48:4
7Single-center study comparing computed tomography colonography with conventional colonoscopy显示文摘AIM:To compare the results from computed tomography (CT) colonography with conventional colonoscopy in symptomatic patients referred for colonoscopy. METHODS: The study included 227 adult outpatients, mean age 60 years, with appropriate indications for colonoscopy. CT colonography and colonoscopy were performed on the same day in a metropolitan teaching hospital. Colonoscopists were initially blinded to the results of CT colonography but there was segmental unblinding during the procedure. The primary outcome measures were the sensitivity and specificity of CT colonography for the identification of polyps seen at colonoscopy (i.e. analysis by polyp). Secondary outcome measures included an analysis by patient, extracolonic findings at CT colonography, adverse events with both procedures and patient acceptance and preference. RESULTS: Twenty-five patients (11%) were excluded from the analysis because of incomplete colonoscopy or poor bowel preparation that affected either CT colonography, colonoscopy or both procedures. Polyps and masses (usually cancers) were detected at colonoscopy and CT colonography in 35% and 42% of patients, respectively. Of nine patients with a finaldiagnosis of cancer, eight (89%) were identified by CT colonography as masses (5) or polyps (3). For polyps analyzed according to polyp, the overall sensitivity of CT colonography was 50% (95% CI, 39%-61%) but this increased to 71% (95% CI, 52%-85%) for polyps ≥ 6 mm in size. Similarly, specificity for all polyps was 48% (95% CI, 39%-58%) increasing to 67% (95% CI, 56%-76%) for polyps ≥ 6 mm. Adverse events were uncommon but included one colonic perforation at colonoscopy. Patient acceptance was high for both procedures but preference favoured CT colonography. CONCLUSION: Although CT colonography was more sensitive in this study than in some previous studies, the procedure is not yet sensitive enough for widespread application in symptomatic patients.Ian C Roberts-Thomson Graeme R Tucker Peter J Hewett Peter Cheung Ruben A Sebben EE Win Khoo Julie D Marker Wayne K Clapton 2008World Journal of Gastroenterology2008,14,3:4
8Hyperspectral vegetation indices and novel algorithms for predicting green LAI of crop canopies: Modeling and validation in the context of precision agriculture显示文摘Driss Haboudane John R Miller Elizabeth Pattey Pablo J Zarco-Tejada Ian B Strachan 2004Remote Sensing of Environment2004,,3:3
9Ramucirumab monotherapy for previously treated advanced gastric or gastro-oesophageal junction adenocarcinoma (REGARD): an international, randomised, multicentre, placebo-controlled, phase 3 trial显示文摘Charles S Fuchs Jiri Tomasek Cho Jae Yong Filip Dumitru Rodolfo Passalacqua Chanchal Goswami Howard Safran Lucas Vieira dos Santos Giuseppe Aprile David R Ferry Bohuslav Melichar Mustapha Tehfe Eldar Topuzov John Raymond Zalcberg Ian Chau William Campbell 2014The Lancet2014,,9911:3
10吃熟肉可以显著改变血肌酐浓度与eGFR显示文摘编辑:Traynor等认为,摄入肉食对血肌酐的浓度以及eGFR的影响较小(见本期第28页)。但是MDRD试验中产生公式的数据主要来源于禁食的病人(AS Levey,个人交流)。但在临床实践中,测定血肌酐与eGFR的标本在采集时通常不考虑病人近期的饮食情况。David J Preiss Ian M Godber Ian R Gunu 隋准 2007英国医学杂志中文版2007,10,1:2
11Historical reflections on autoimmune hepatitis显示文摘Autoimmune hepatitis(AIH),initially known as chronic active or active chronic hepatitis(and by various other names),first came under clinical notice in the late 1940s.However,quite likely,chronic active hepatitis(CAH) had been observed prior to this and was attributed to a persistently destructive virus infection of the liver.An earlier(and controversial) designation in 1956 as lupoid hepatitis was derived from associated L.E.cell test positivity and emphasized accompanying multisystem features and immunological aberrations.Young women featured prominently in early descriptions of CAH.AIH was first applied in 1965 as a descriptive term.Disease-characteristic autoantibodies were defined from the early 1960s,notably antinuclear antibody(ANA),smooth muscle antibody(SMA) and liver-kidney microsomal(LKM) antibody.These are still widely used diagnostically but their relationship to pathogenesis is still not evident.A liver and disease specific autoantigen has long been searched for but unsuccessfully.Prolonged immunosuppressive therapy with predisolone and azathioprine in the 1960s proved beneficial and remains standard therapy today.AIH like many other autoimmune diseases is associated with particular HLA alleles especially with the 'ancestral' B8,DR3 haplotype,and also with DR4.Looking forwards,AIH is one of the several enigmatic autoimmune diseases that,despite being(relatively) organ specific,are marked by autoimmune reactivities with non-organ-specific autoantigens.New paradigms are needed to explain the occurrence,expressions and pathogenesis of such diseases.Ian R Mackay 2008World Journal of Gastroenterology2008,14,21:2
12Ramucirumab monotherapy for previously treated advanced gastric or gastro-oesophageal junction adenocarcinoma (REGARD): an international, randomised, multicentre, placebo-controlled, phase 3 trial显示文摘Charles S Fuchs Jiri Tomasek Cho Jae Yong Filip Dumitru Rodolfo Passalacqua Chanchal Goswami Howard Safran Lucas Vieira dos Santos Giuseppe Aprile David R Ferry Bohuslav Melichar Mustapha Tehfe Eldar Topuzov John Raymond Zalcberg Ian Chau William Campbell 20142014 (9911)2014,,9911:2
13多重结局的多元Meta分析和多重治疗的网状Meta分析:原理、概念及实例显示文摘英国国家健康与临床优选研究所(NICE)等组织需要对现有研究获得的证据进行整合来指导决策,需要确定关于多重疗效及安全性结局的最佳治疗。但是,相关的研究不一定对所有关注的治疗或结局都进行了直接比较,多元Meta分析及网状Meta分析为如何确定最佳治疗这一问题提供了思路,该方法不仅考虑了直接证据,还利用了关联或间接的证据。本文中,研究者描述了这些方法学的重要概念及假设,并阐述关联及间接证据如何产生,同时通过图表说明这些证据在涉及多重结局和多重治疗的真实临床案例中如何使用。Richard D Riley Dan Jackson Georgia Salanti Danielle L Burke Malcolm Price Jamie Kirkham Ian R White 孙至佳(译) 张岩(译) 刘雪晴(译) 杨智荣(校) 孙凤(校) 2018英国医学杂志中文版2018,21,12:2
14Hepatitis C Virus Infects the Endothelial Cells of the Blood-Brain Barrier显示文摘Nicola F. Fletcher Garrick K. Wilson Jacinta Murray Ke Hu Andrew Lewis Gary M. Reynolds Zania Stamataki Luke W. Meredith Ian A. Rowe Guangxiang Luo Miguel A. Lopez–Ramirez Thomas F. Baumert Babette Weksler Pierre–Olivier Couraud Kwang Sik Kim Ignacio A. R 2012Gastroenterology2012,,3:2
15Utility of liver biopsy in predicting clinical outcomes after percutaneous angioplasty for hepatic venous obstruction in liver transplant patients显示文摘AIM: To determine utility of transplant liver biopsy in evaluating efficacy of percutaneous transluminal angioplasty(PTA) for hepatic venous obstruction(HVOO). METHODS: Adult liver transplant patients treated with PTA for HVOO(2003-2013) at a single institution were reviewed for pre/post-PTA imaging findings, manometry(gradient with right atrium), presence of HVOO on prePTA and post-PTA early and late biopsy(EB and LB, < or > 60 d after PTA), and clinical outcome, defined as good(no clinical issues, non-HVOO-related death) or poor(surgical correction, recurrent HVOO, or HVOOrelated death). RESULTS: Fifteen patients meeting inclusion criteria underwent 21 PTA, 658 ± 1293 d after transplant.In procedures with pre-PTA biopsy(n = 19), no difference was seen between pre-PTA gradient in 13/19 procedures with HVOO on biopsy and 6/19 procedures without HVOO(8 ± 2.4 mm Hg vs 6.8 ± 4.3 mm Hg; P = 0.35). Post-PTA, 10/21 livers had EB(29 ± 21 d) and 9/21 livers had LB(153 ± 81 d). On clinical follow-up(392 ± 773 d), HVOO on LB resulted in poor outcomes and absence of HVOO on LB resulted good outcomes. Patients with HVOO on EB(3/7 good, 4/7 poor) and no HVOO on EB(2/3 good, 1/3 poor) had mixed outcomes. CONCLUSION: Negative liver biopsy greater than 60 d after PTA accurately identifies patients with good clinical outcomes.Ammar Sarwar Edward Ahn Ian Brennan Olga R Brook Salomao Faintuch Raza Malik Khalid Khwaja Muneeb Ahmed 2015World Journal of Hepatology2015,7,14:2
16Wireless multimedia sensor network: a survey显示文摘Ian F A Tommaso M Kaushik R C 2007IEEE Wireless Communications2007,14,6:1
17Role of estrogens as promoters of hepatic neoplasia显示文摘Ian R Siapak GI Marsh JN 1982Lab Inv1982,46,3:1
18Enteric coated HPMC capsules designed to achieve intestinal targeting显示文摘Ewart T Cole Robert A Scott Alyson L Connor Ian R Wilding Hans-U Petereit Carsten Schminke Thomas Beckert Dominique Cadé 2002International Journal of Pharmaceutics2002,,1:1
19Manu{acturing engineering and technology 显示文摘Kalpak]ian S Schmid S R 2005Upper Saddle River2005,30,3:1
20Preparation of enantiomerically pure fructose-derived 1, 3-oxazin-2-one by INIR methodology and its application as a chiral auxiliary in some model asymmetric reactions显示文摘MALCOLM R B CADOGAN J I G IAN G 1998Tetrahedron1998,54,33:1
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