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| 1 | Pediatric non-alcoholic steatohepatitis:The first report on the ultrastructure of hepatocyte mitochondria显示文摘AIM:To investigate the ultrastructure of abnormal hepatocyte mitochondria,including their cellular and hepatic zonal distribution,in bioptates in pediatric nonalcoholic steatohepatitis(NASH).METHODS:Ultrastructural investigations were conducted on biopsy liver specimens obtained from 10children(6 boys and 4 girls)aged 2-14 years with previously clinicopathologically diagnosed NASH.The disease was diagnosed if liver biopsy revealed steatosis,inflammation,ballooned hepatocytes,Mallory hyaline,or focal necrosis,varying degrees of fibrosis in the absence of clinical,serological,or histological findings of infectious liver diseases,autoimmune hepatitis,metabolic liver diseases,or celiac disease.For ultrastructural analysis,fresh small liver blocks(1 mm3 volume)were fixed in a solution containing 2%paraformaldehyde and 2.5%glutaraldehyde in 0.1 mol/L cacodylate buffer.The specimens were postfixed in osmium tetroxide,subsequently dehydrated through a graded series of ethanols and propylene oxide,and embedded in Epon812.The material was sectioned on a Reichert ultramicrotome to obtain semithin sections,which were stained with methylene blue in sodium borate.Ultrathin sections were contrasted with uranyl acetate and lead citrate,and examined using an Opton EM 900 transmission electron microscope.RESULTS:Ultrastructural analysis of bioptates obtained from children with non-alcoholic steatohepatitis revealed characteristic repetitive mitochondrial abnormalities within hepatocytes;mainly mitochondrial polymorphisms such as megamitochondria,loss of mitochondrial cristae,and the presence of linear crystalline inclusions within the mitochondrial matrix of an increased electron density.The crystalline inclusions were particularly evident within megamitochondria(MMC),which seemed to be distributed randomly both within the hepatic parenchymal cell and the zones of hepatic lobule,without special variations in abundance.The inclusions appeared as bundles viewed longitudinally,or as an evenly spaced matrix in cross section,and frequently caused mitochondrial deformation.The average diameter of these linear structures was 10 nm and the average space between them 20 nm.Sometimes enlarged intramitochondrial granules were seen in their vicinity.Foamy cytoplasm of hepatocytes was found,resulting from the proliferation of smooth endoplasmic reticulum and glycogen accumulation.The perivascular space of Disse was frequently dilated,and contained transitional hepatic stellate cells,as well as mature and/or newly forming collagen fiber bundles.CONCLUSION:Marked ultrastructural abnormalities observed in hepatocyte mitochondria,especially their polymorphism in the form of MMC and loss of mitochondrial cristae,accompanied by foamy cytoplasm,clearly indicate a major role of these organelles in the morphogenesis of pediatric NASH.Our findings seem to prove the high effectiveness of electron microscopy in the diagnosis of the disease. | Joanna M Lotowska Maria E Sobaniec-Lotowska Sylwia B Bockowska Dariusz M Lebensztejn | 2014 | World Journal of Gastroenterology2014，20，15： | 3 |
| 2 | Whole brain radiation therapy with or without stereotactic radiosurgery boost for patients with one to three brain metastases: phase III results of the RTOG 9508 randomised trial显示文摘 | David W Andrews Charles B Scott Paul W Sperduto Adam E Flanders Laurie E Gaspar Michael C Schell Maria Werner-Wasik William Demas Janice Ryu Jean-Paul Bahary Luis Souhami Marvin Rotman Minesh P Mehta Walter J Curran | 2004 | The Lancet . 2004 (9422)2004，，9422： | 2 |
| 3 | Chemical factors for chemical-mechanical and electrochemical mechanical planarization of silver examined using potentiodynamic and impedance measurements 显示文摘 | SAMUEL B E JENNIFER L H MARIA A D | 2005 | Materials Chemistry and Physics2005，89，23： | 1 |
| 4 | Alternative nuclear functions for NF-KB family members显示文摘 | Llufs E Anna B Maria C M | 2011 | Am J Cancer Res2011，1，4： | 1 |
| 5 | Capillary electrophoresis of free fatty acids by indirect uhraviolet 显示文摘 | Maria V B Aaron E D Maria J L G | 2011 | Journal of Agriculture and Food Chemistry2011，59，10： | 1 |
| 6 | Analyzing a fLrm' s In- ternational Portfolio of Technological Knowledge: A Declarative Ontology-based OWL Approach for Patent Documents显示文摘 | Maria B E Manuel N Nuria H T | 2013 | Ad- vanced Engineering Informatics2013，27，3： | 1 |
| 7 | Capillary e- lectrophoresis of free fatty acids by Indirect ultraviolet detection: application to the classification of vegetable oils according to their botanical origin显示文摘 | Maria V B Aar6n E D Jests L G M | 2011 | Food Chem- istry2011，59，10： | 1 |
| 8 | 难治性类风湿关节炎的临床特点:一项国际问卷调查研究显示文摘目的尽管按照目前欧洲抗风湿联盟(EULAR)的推荐对类风湿关节炎(rheumatoid arthritis,RA)患者进行治疗,难治性RA患者的临床症状却仍然没有得到完全控制,目前EULAR指南主要关注的是RA的早期治疗和药物治疗。本研究的目的在于分析难治性RA患者的临床特点,以及在患者管理中需要探索然而现有EULAR指南并未涉及的问题。方法对多个国家的风湿科医生进行问卷调查,分析难治性RA的临床特点。问卷包括多选题以及开放性问题,从开放性问题的回答中发现需要进一步阐明的问题以及现有EULAR指南需要增加的内容。结果410名受访者完成了调查问卷,关于难治性RA的特点:50%受访者认为基于28个关节评估的疾病活动评分(disease activity score assessing 28 joints,DAS28)>3.2或存在疾病活动的征象;42%受访者认为疲劳是其特点;48%认为至少两种传统合成改变病情抗风湿药(DMARDs)以及使用至少两种生物制剂或靶向合成DMARDs治疗失败;89%认为糖皮质激素不能减量到5 mg/天或泼尼松不能减量到10 mg/天或同等剂量的其他激素。另外,现有EULAR指南中应增加合并症和关节外表现的干预以及多种药物联合治疗等重要内容。结论目前风湿科医生对难治性RA的定义有很大争议。难治性RA患者的很多重要问题目前EULAR指南中均没有涉及。 | Nadia MT Roodenrijs Maria J H de Hair Marlies C van der Goes Johannes WG Jacobs Paco MJ Welsing Désirée van der Heijde Daniel Aletaha Maxime Dougados Kimme L Hyrich Iain B McInnes Ulf Mueller-Ladner Ladislav Senolt Zoltan Szekanecz Jacob Mvan Laar Nagy Gyorgy 黄艳荣(译) 张卓莉(审校) | 2019 | 英国医学杂志中文版2019，22，2： | 1 |
| 9 | Parameters affecting microwave-assisted extraction of organophosphorus pesticides from agricultural soil显示文摘 | EDWAR F MARiA E B RONNIE L | 2007 | Journal of Chromatography A2007，1169，12： | 1 |
| 10 | Does algal morphology affect amphipod susceptibility to fish predation 显示文摘 | Maria B H Charles H P Mark E H | 1990 | Journal of Experimental Marine Biology and Ecology1990，139，： | 1 |
| 11 | Evaluation of an aroma similar to that of sparkling wine:Sensory and gas chromatography analyses of fermented grape musts显示文摘 | Maria E O Mamede Helena M A B Cardello Glaucia M Pastore | 2005 | Food Chemistry2005，89，： | 1 |
| 12 | Catalytic ozonation andmethods of enhancingmolccu-lar ozone reactions inwater treatment显示文摘 | Kasprzyk H B Maria Z E Jacek N | 2003 | Applied Catalysis B2003，46，： | 1 |
| 13 | Role of preoperative ultrasonography in the surgical management of patients with thyroid cancer显示文摘 | Maria A Kouvaraki Suzanne E Shapiro Bruno D Fornage Beth S Edeiken-Monro Steven I Sherman Rena Vassilopoulou-Sellin Jeffrey E Lee Douglas B Evans | 2003 | Surgery2003，，6： | 1 |
| 14 | Mitochondrial-targeted protective properties of isolated diterpenoids from sideritis spp, in response to the deleterious changes induced by H2O2 显示文摘 | Elena G B Ana I D Maria E C | 2013 | Nat Prod2013，76，5： | 1 |
| 15 | Batch xylitol production from wheat straw hemicellulosic hydrolysate using Candida guilliermondii in a stirred tank reactor显示文摘 | Larissa Canilha Joo B Almeida e Silva Maria G A Felipe | 2003 | Biotechnology Letters2003，25，： | 1 |
| 16 | Cellular Mechanisms of Direct-current Electric Field Effects:Galvanotaxis and Metastatic Disease显示文摘 | MARIA E MYCIELSKA M F DJAMGOZ B A | 2004 | Journal of Cell Science2004，117，： | 1 |
| 17 | Otegui maize kernel response to postflowering source-sink ratio显示文摘 | LUCAS B MARIA E | 2001 | Crop Sci2001，49，： | 1 |
| 18 | Protein degradation in C3 and C4 plants with particular reference to ribulose bisphosphate carboxylase and glycolate oxidase显示文摘 | MARIA G E RICARDO B F ARTUR R T | 1998 | Journal of Experimental Botany1998，49，： | 1 |
| 19 | Bioavailability of microencapsulated ferrous sulfate in powdered milk produced from fortified fluid milk:A prophylactic study in rats显示文摘 | Alexis E L Marcela B Z Maria J S | 2002 | Nutrition2002，18，3： | 1 |
| 20 | Chemoselective hy- drogenation of halonitroaromatics over ?-Fe203-supported platinum nanoparticles: The role of the support on their catalytic activity and selectivity显示文摘 | Claudio E Laura A A Maria B | 2013 | J Mol Catal A: Chem2013，366，： | 1 |
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