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| 1 | Diagnosis of gastrointestinal bleeding: A practical guide for clinicians显示文摘Gastrointestinal bleeding is a common problem encountered in the emergency department and in the primary care setting. Acute or overt gastrointestinal bleeding is visible in the form of hematemesis, melena or hematochezia. Chronic or occult gastrointestinal bleeding is notapparent to the patient and usually presents as positive fecal occult blood or iron deficiency anemia. Obscure gastrointestinal bleeding is recurrent bleeding when the source remains unidentified after upper endoscopy and colonoscopic evaluation and is usually from the small intestine. Accurate clinical diagnosis is crucial and guides definitive investigations and interventions. This review summarizes the overall diagnostic approach to gastrointestinal bleeding and provides a practical guide for clinicians. | Bong Sik Matthew Kim Bob T Li Alexander Engel Jaswinder S Samra Stephen Clarke Ian D Norton Angela E Li | 2014 | World Journal of Gastrointestinal Pathophysiology2014，5，4： | 13 |
| 2 | 非胰岛素依赖型糖尿病冠状动脉疾病的危险因素:英国糖尿病前瞻性研究(UKPDS:23)显示文摘目的:评价2型糖尿病患者冠状动脉疾病的基线危险因素。设计:对2 693例资料完整的患者进行年龄和性别调整的逐步选择过程分析,以确定哪些冠状动脉疾病的危险因素应纳入 Cox 比例风险模型。对象:3 055例白人患者,平均年龄52岁,均新近诊断为2型糖尿病,且无动脉粥样硬化相关疾病的证据。平均随访期7.9年。335例患者于10年内出现冠状动脉疾病。结局评定:具有明确异常心电图的心绞痛、致死或非致死性心肌梗塞。结果:冠状动脉疾病与低密度脂蛋白胆固醇浓度升高、高密度脂蛋白胆固醇浓度降低、甘油三酯浓度升高、高血红蛋白 A_(1c)、高收缩压、高空腹血糖以及吸烟史密切相关。低密度脂蛋白胆固醇较高1/3对较低1/3区间的估计风险比为2.26(95%可信区间为1.70~3.00),高密度脂蛋白胆固醇为0.55(0.41~0.73),血红蛋白 A_(1c)为1.52(1.15~2.01),收缩压为1.82(1.34~2.47)。吸烟者的估计风险比为1.41(1.06~1.88)。结论:2型糖尿病患者中,存在冠状动脉疾病潜在的、可变的5种危险因素的交叉重叠影响。它们是低密度脂蛋白胆固醇浓度升高、高密度脂蛋白胆固醇浓度降低、高血压、高血糖和吸烟。 | R C Turner H Millns H A W Neil I M Stratton S E Manley D R Matthews R R Holman 赵维纲 | 1998 | 英国医学杂志中文版1998，0，3： | 11 |
| 3 | Revisiting normal perfusion pressure breakthrough in light of hemorrhage-induced vasospasm显示文摘Cerebral arteriovenous malformations(AVMs) have abnormally enlarged arteries and veins prone to spontaneous hemorrhage.Immediately following surgical excision of a cerebral AVM,even normal brain tissue surrounding the lesion is subject to hemorrhage,a phenomenon termed normal perfusion pressure breakthrough(NPPB) syndrome.According to this theory,arteries supplying cerebral AVMs become dilated and lose their capacity to dilate or constrict to autoregulate pressure.Acutely after removal of a cerebral AVM,excessive blood pressure in these arterial feeders can cause normal brain tissue to bleed.However,this theory remains controversial.We present a patient with a cerebral AVM that demonstrated cerebrovascular reactivity and argues against an assumption underlying the theory of NPPB syndrome. | Matthew D Alexander E Sander Connolly Philip M Meyers | 2010 | World Journal of Radiology2010，2，6： | 3 |
| 4 | Macrophage secretory products induce an inflammatory phenotype in hepatocytes显示文摘AIM:To investigate the influence of macrophages on hepatocyte phenotype and function.METHODS:Macrophages were differentiated from THP-1 monocytes via phorbol myristate acetate stimulation and the effects of monocyte or macrophageconditioned medium on HepG2 mRNA and protein expression determined.The in vivo relevance of these findings was confirmed using liver biopsies from 147 patients with hepatitis C virus(HCV)infection.RESULTS:Conditioned media from macrophages,but not monocytes,induced a transient morphological change in hepatocytes associated with upregulation of vimentin(7.8±2.5-fold,P=0.045)and transforming growth factor(TGF)-β1(2.6±0.2-fold,P<0.001)and downregulation of epithelial cadherin(1.7±0.02-fold,P=0.017)mRNA expression.Microarray analysis revealed significant upregulation of lipocalin-2(17-fold,P <0.001)and pathways associated with inflammation,and substantial downregulation of pathways related to hepatocyte function.In patients with chronic HCV,realtime polymerase chain reaction and immunohistochemistry confirmed an increase in lipocalin-2 mRNA(F0 1.0 ±0.3,F1 2.2±0.2,F2 3.0±9.3,F3/4 4.0±0.8,P= 0.003)and protein expression(F1 1.0±0.5,F2 1.3± 0.4,F3/4 3.6±0.4,P=0.014)with increasing liver injury.High performance liquid chromatography-tandem mass spectrometry analysis identified elevated levels of matrix metalloproteinase(MMP)-9 in macrophageconditioned medium,and a chemical inhibitor of MMP-9 attenuated the change in morphology and mRNA expression of TGF-β1(2.9±0.2 vs 1.04±0.1,P<0.001) in macrophage-conditioned media treated HepG2 cells.In patients with chronic HCV infection,hepatic mRNA expression of CD163(F0 1.0±0.2,F1/2 2.8±0.3,F3/4 5.3±1.0,P=0.001)and MMP-9(F0 1.0±0.4,F1/2 2.8±0.3,F3/4 4.1±0.8,P=0.011)was significantly associated with increasing stage of fibrosis.CONCLUSION:Secreted macrophage products alter the phenotype and function of hepatocytes,with increased expression of inflammatory mediators,suggesting that hepatocytes actively participate in liver injury. | Michelle Melino Victoria L Gadd Gene V Walker Richard Skoien Helen D Barrie Dinesh Jothimani Leigh Horsfall Alun Jones Matthew J Sweet Gethin P Thomas Andrew D Clouston Julie R Jonsson Elizabeth E Powell | 2012 | World Journal of Gastroenterology2012，18，15： | 3 |
| 5 | Senescent human hepatocytes express a unique secretory phenotype and promote macrophage migration显示文摘AIM:To develop a model of stress-induced senescence to study the hepatocyte senescence associated secretory phenotype(SASP).METHODS:Hydrogen peroxide treatment was used to induce senescence in the human Hep G2 hepatocyte cell line.Senescence was confirmed by cytochemical staining for a panel of markers including Ki67,p21,heterochromatin protein 1β,and senescence-associated-β-galactosidase activity.Senescent hepatocytes were characterised by gene expression arrays and quantitative polymerase chain reaction(q PCR),and conditioned media was used in proteomic analyses,a human chemokine protein array,and cell migration assays to characterise the composition and function of the hepatocyte SASP.RESULTS:Senescent hepatocytes induced classical markers of senescence(p21,heterochromatin protein1β,and senescence-associated-β-galactosidase activity);and downregulated the proliferation marker,Ki67.Hepatocyte senescence induced a 4.6-fold increase in total secreted protein(P=0.06)without major alterations in the protein profile.Senescence-induced genes were identified by microarray(Benjamini Hochbergcorrected P<0.05);and,consistent with the increase in secreted protein,gene ontology analysis revealed a significant enrichment of secreted proteins among inducible genes.The hepatocyte SASP included characteristic factors such as interleukin(IL)-8 and IL-6,as well as novel components such as SAA4,IL-32and Fibrinogen,which were validated by q PCR and/or chemokine protein array.Senescent hepatocyteconditioned medium elicited migration of inflammatory(granulocyte-macrophage colony stimulating factor,GM-CSF-derived),but not non-inflammatory(CSF-1-derived)human macrophages(P=0.022),which could contribute to a pro-inflammatory microenvironment in vivo,or facilitate the clearance of senescent cells.CONCLUSION:Our novel model of hepatocyte senescence provides insights into mechanisms by which senescent hepatocytes may promote chronic liver disease pathogenesis. | Katharine M Irvine Richard Skoien Nilesh J Bokil Michelle Melino Gethin P Thomas Dorothy Loo Brian Gabrielli Michelle M Hill Matthew J Sweet Andrew D Clouston Elizabeth E Powell | 2014 | World Journal of Gastroenterology2014，20，47： | 2 |
| 6 | Emerging artificial intelligence applications in liver magnetic resonance imaging显示文摘Chronic liver diseases(CLDs)are becoming increasingly more prevalent in modern society.The use of imaging techniques for early detection,such as magnetic resonance imaging(MRI),is crucial in reducing the impact of these diseases on healthcare systems.Artificial intelligence(AI)algorithms have been shown over the past decade to excel at image-based analysis tasks such as detection and segmentation.When applied to liver MRI,they have the potential to improve clinical decision making,and increase throughput by automating analyses.With Liver diseases becoming more prevalent in society,the need to implement these techniques to utilize liver MRI to its full potential,is paramount.In this review,we report on the current methods and applications of AI methods in liver MRI,with a focus on machine learning and deep learning methods.We assess four main themes of segmentation,classification,image synthesis and artefact detection,and their respective potential in liver MRI and the wider clinic.We provide a brief explanation of some of the algorithms used and explore the current challenges affecting the field.Though there are many hurdles to overcome in implementing AI methods in the clinic,we conclude that AI methods have the potential to positively aid healthcare professionals for years to come. | Charles E Hill Luca Biasiolli Matthew D Robson Vicente Grau Michael Pavlides | 2021 | World Journal of Gastroenterology2021，27，40： | 2 |
| 7 | Electrospinning of collagen nanofibers 显示文摘 | Matthews J A Wnek G E Simpson D G | 2002 | Biomacromolecules2002，3，2： | 1 |
| 8 | Adaptation of HIV-1to human leukocyte antigen class I显示文摘 | Kawashima Y Pfafferott K Frater J Matthews P Payne R Addo M Gatanaga H Fujiwara M Hachiya A Koizumi H Kuse N Oka S Duda A Prendergast A Crawford H Leslie A Brumme Z Brumme C Allen T Brander C Kaslow R Tang J Hunter E Allen S Mulenga J Branch S Roach T John M Mallal S Ogwu A Shapiro R Prado J G Fidler S Weber J Pybus O G Klenerman P Ndung'u T Phillips R Heckerman D Harrigan P R Walker B D Takiguchi M Goulder P | 2009 | Nature2009，458，7238： | 1 |
| 9 | Elemental fluorine Part 12 fluorination of 1,4 - disubstituted aromatic compounds显示文摘 | Richard D C John H Matthew E S | 2000 | J Fluorine Chem2000，102，12： | 1 |
| 10 | Creep properties andprecipitate evolution in A1-Li alloys microalloyed with Sc and Yb显示文摘 | Matthew E K David N S David C D | 2012 | Materials Science and Engineering A2012，550，： | 1 |
| 11 | 16S rRNA gene sequence analysis of Photobacterium damselae and nested PCR method for rapid detection of the causative agent of fish pasteruellosis显示文摘 | CARLOS R O MATTHEW D C ALICIA E T | 1999 | Appl Environ Microbiol1999，65，7： | 1 |
| 12 | Vehicle detection and recognition in grey scale imagery显示文摘 | Matthews N D An P E Charnley D | 1996 | Control Engineering Practice Printed in Great Britain1996，4，4： | 1 |
| 13 | Enhanced pre-synaptic glutamate release in deep-dorsal horn contributes to calcium channel alpha-2-delta-1 protein-mediated spinal sensitization and behavioral hypersensitivity显示文摘 | Nguyen D Deng P Matthews E A | | 0，，： | 1 |
| 14 | An eight-step kinetics mechanism for high temperature propane flames 显示文摘 | Kiehne T M Matthews R D Wilson D E | 1987 | Combustion Science and Technology1987，54，1： | 1 |
| 15 | Maximum likelihood estimation of a survival function with a change point for truncated and interval-censored data显示文摘 | Lira H Sun Jianguo Matthews D E | 2002 | Statistics in Medicine2002，21，5： | 1 |
| 16 | Data mining for simple sequence repeats in expressed sequence tags from barley,maize,rice,sorghum and wheat显示文摘 | Kantety R V Rota M L Matthews D E | 2002 | Plant Mol Biol2002，48，： | 1 |
| 17 | Data mining for simple sequence repeats in expressed sequence tags from barley显示文摘 | Kantety R V La Rota M Matthews D E | 2002 | Plant Mol Biol2002，48，56： | 1 |
| 18 | Data mining for simple sequence repeats in expressed sequence tags from barley, maize, rice, sorghum and wheat 显示文摘 | KANTETY R V LA ROTA M MATTHEWS D E | 2002 | Plant Molecular Biology2002，48，5： | 1 |
| 19 | Electrospinning of collagen typeII:a feasibility study显示文摘 | Matthews J A Boland E D Wnek G E | 2003 | Journal of Bioactive and Compatible Polymers2003，18，2： | 1 |
| 20 | 查看详情显示文摘 | Matthews D L Campbell E M Ceglio N M Hermes G Kauffman R Koppel L Lee R Manes K Rupert V Slivinsky W Turner R Ze F | | 0，，： | 1 |
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