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1723篇 您的检索式:作者名="Silveira"
    题名 作者 年代 出处 被引量
1Clinical features and management of primary sclerosing cholangitis显示文摘Primary sclerosing cholangitis is a chronic cholestatic liver disease characterized by inflammation and fibrosis of the bile ducts,resulting in cirrhosis and need for liver transplantation and reduced life expectancy.The majority of cases occur in young and middle-aged men,often in association with inflammatory bowel disease.The etiology of primary sclerosing cholangitis includes immune-mediated components and elements of undefined nature.No effective medical therapy has been identified.The multiple complications of primary sclerosing cholangitis include metabolic bone disease,dominant strictures,bacterial cholangitis,and malignancy,particularly cholangiocarcinoma,which is the most lethal complication of primary sclerosing cholangitis.Liver transplantation is currently the only life-extending therapeutic alternative for patients with end-stage disease,although recurrence in the allografted liver has been described.A PSC-like variant attracting attention is cholangitis marked by raised levels of the immunoglobulin G4 subclass,prominence of plasma cells within the lesions,and steroid responsiveness.Marina G Silveira Keith D Lindor 2008World Journal of Gastroenterology2008,14,21:9
2Chronic exposure to ethanol causes steatosis and inflammation in zebrafish liver显示文摘AIM To evaluate the effects of chronic exposure to ethanol in the liver and the expression of inflammatory genesin zebrafish.METHODS Zebrafish(n = 104),wild type,adult,male and female,were divided into two groups:Control and ethanol(0.05 v/v).The ethanol was directly added into water;tanks water were changed every two days and the ethanol replaced.The animals were fed twice a day with fish food until satiety.After two and four weeks of trial,livers were dissected,histological analysis(hematoxilineosin and Oil Red staining) and gene expression assessment of adiponectin,adiponectin receptor 2(adipor2),sirtuin-1(sirt-1),tumor necrosis factor-alpha(tnf-a),interleukin-1b(il-1b) and interleukin-10(il-10) were performed.Ultrastructural evaluations were conducted at fourth week.RESULTS Exposing zebrafish to 0.5% ethanol developed intense liver steatosis after four weeks,as demonstrated by oil red staining.In ethanol-treated animals,the main ultrastructural changes were related to cytoplasmic lipid particles and droplets,increased number of rough endoplasmic reticulum cisterns and glycogen particles.Between two and four weeks,hepatic mR NA expression of il-1b,sirt-1 and adipor2 were upregulated,indicating that ethanol triggered signaling molecules which are key elements in both hepatic inflammatory and protective responses.Adiponectin was not detected in the liver of animals exposed and not exposed to ethanol,and il-10 did not show significant difference.CONCLUSION Data suggest that inflammatory signaling and ultrastructural alterations play a significant role during hepatic steatosis in zebrafish chronically exposed to ethanol.Ana Claudia Reis Schneider Cleandra Gregório Carolina Uribe-Cruz Ranieli Guizzo Tais Malysz Maria Cristina Faccioni-Heuser Larisse Longo Themis Reverbel da Silveira 2017World Journal of Hepatology2017,9,8:7
3Gastric endoscopic submucosal dissection:From animal model to patient显示文摘AIM:To assess whether the use of porcine models is useful for learning endoscopic submucosal dissection(ESD),thus contributing to its subsequent application in human patients.METHODS:This study/learning process was carried out in 3 phases:PhaseⅠ:Ex vivo animal;PhaseⅡ:In vivo animal;PhaseⅢ:Humans.One endoscopist performed 30 gastric ESDs in porcine models,and later 5gastric ESDs in 5 patients.The ESD was done following the method practiced at the National Cancer Center in Tokyo,Japan.Technical aspects,size,time and speed of ESD,as well as complications were registered.In patients,their clinical,endoscopic and histologic evolution was additionally added.RESULTS:Thirty en bloc ESDs were carried out in animal models.The mean±SD size of the pieces was of28.4±1.2 mm,and the time of ESD was 41.7±2.4min.The time of ESD in the first 15 procedures was 43.0±3.0 min whereas in the next 15 procedures,the time was 40.3±3.9 min,P=0.588.The speed in the first 15ESDs was 1.25±0.11 cm2/min vs 2.12±0.36 cm2/min in the remaining 15,P=0.028.There were no complications.In patients,5 lesions were resected en bloc.The size of the pieces was 25.2±5.1 mm and the time was85.0±25.6 min.Endoscopic and histological controls did not show evidence of residual neoplastic tissue.CONCLUSION:A sequential ESD training program of a unique endoscopist,based on the practice in porcine models,contributed to learning ESD for its subsequent application in humans,yielding good results in efficacy and safety.Nicolás González Adolfo Parra-Blanco Miguel Villa-Gómez Alejandra Gamba Andrés Taullard Anaulina Silveira Alberto Sanguinetti Carolina Olano Henry Cohen 2013World Journal of Gastroenterology2013,19,45:6
4Anthropometric indicators of visceral adiposity as predictors of non-alcoholic fatty liver disease: A review显示文摘The objective was to critically analyze studies that evaluated the predictive capacity of indicators of visceral adiposity in non-alcoholic fatty liver disease(NAFLD). The bibliographic research was carried out using the electronic database PubMed, LILACS and SciELO, references of selected articles. Although we found few studies, they have already used several indicators of visceral adiposity as waist circumference, waist-to-hip ratio, waist-to-height ratio, Lipid accumulation product, Body Shape Index, Body Roundness Index and most them were good predictors of NAFLD. Thus, the anthropometric indicators may contribute for the diagnosis of NAFLD in a simple, low-cost and noninvasive way, allowing early therapeutic measures to prevent the evolution to non-alcoholic steatohepatitis.Naiade Silveira Almeida Raquel Rocha Helma Pinchemel Cotrim Carla Daltro 2018World Journal of Hepatology2018,10,10:5
5三种药物联合清除耐多粘菌素和碳青霉烯类药物的鲍曼不动杆菌显示文摘目的 耐多粘菌素鲍曼不动杆菌的出现使临床医生对多重耐药鲍曼不动杆菌感染的治疗束手无策。研究体外模拟多粘菌素耐药菌株的出现,评价耐多粘菌素菌株感染的联合用药效果。豆清娅 吴安华 Lenhard JR Thamlikitkul V Silveira FP 2017中国感染控制杂志2017,16,7:5
6Transcriptome analyses of the Dof-like gene family in grapevine reveal its involvement in berry, flower and seed development显示文摘The Dof(DNA-binding with one finger)protein family spans a group of plant transcription factors involved in the regulation of several functions,such as plant responses to stress,hormones and light,phytochrome signaling and seed germination.Here we describe the Dof-like gene family in grapevine(Vitis vinifera L.),which consists of 25 genes coding for Dof.An extensive in silico characterization of the VviDofL gene family was performed.Additionally,the expression of the entire gene family was assessed in 54 grapevine tissues and organs using an integrated approach with microarray(cv Corvina)and real-time PCR(cv Pinot Noir)analyses.The phylogenetic analysis comparing grapevine sequences with those of Arabidopsis,tomato,poplar and already described Dof genes in other species allowed us to identify several duplicated genes.The diversification of grapevine DofL genes during evolution likely resulted in a broader range of biological roles.Furthermore,distinct expression patterns were identified between samples analyzed,corroborating such hypothesis.Our expression results indicate that several VviDofL genes perform their functional roles mainly during flower,berry and seed development,highlighting their importance for grapevine growth and production.The identification of similar expression profiles between both approaches strongly suggests that these genes have important regulatory roles that are evolutionally conserved between grapevine cvs Corvina and Pinot Noir.Danielle Costenaro da Silva Vítor da Silveira Falavigna Marianna Fasoli Vanessa Buffon Diogo Denardi Porto Georgios Joannis Pappas Jr Mario Pezzotti Giancarlo Pasquali Luís Fernando Revers 2016Horticulture Research2016,3,1:5
7A perivascular epithelioid cell tumor of the stomach:An unsuspected diagnosis显示文摘Perivascular epithelioid cell tumor(PEComa) is a rare mesenchymal neoplasia and currently well recognized as a distinct entity with characteristic morphological,immunohistochemical and molecular findings.We report a case of PEComa arising in the antrum of a 71-year-old female with melena.The tumor,located predominantly in the submucosa as a well delimited nodule,measured 3.0 cm in diameter and was completely resected,with no evidence of the disease elsewhere.Histologically,it was composed predominantly of eosinophilic epithelioid cells arranged in small nests commonly related to variably sized vessels,with abundant extracellular material,moderate nuclear variation and discrete mitotic activity.No necrosis,angiolymphatic invasion or perineural infil-tration was seen.Tumor cells were uniformly positive for vimentin,smooth muscle actin,desmin and melan A.Although unusual,PEComa should be considered in the differential diagnosis of gastric neoplasia with characteristic epithelioid and oncocytic features and prominent vasculature.Cristina Aparecida Troques da Silveira Mitteldorf Dario Birolini Luis Heraldo da Camara-Lopes 2010World Journal of Gastroenterology2010,16,4:4
8基于学校的营养教育干预对体质指数的影响——随机对照社区试验的荟萃分析显示文摘本次研究旨在评估基于学校基础的营养教育干预措施降低或预防青少年和儿童的超重、肥胖的效果一研究者系统搜索了截至2010年5月的14个数据库的文献.参考了8项研究该主题的RCT试验的系统评价。研究者还使用PubMed搜索了截至2012年5月的文献,并没有额外发现。体质指数(BMI)是主要的研究指标,标题、摘要审查及质量评估均由2位研究者独立进行.所有数据的存储、处理及分析均使用统计软件EPPI-Reviewer3。初始4888篇文献中,只有8篇符合meta分析的条件。样本人群是青少年和儿童。Silveira JA Taddei JA Guerra PH Nobre MR 林双 2013营养健康新观察2013,0,1:4
9Exercise manual for liver disease patients显示文摘AIM: To increase inspiratory muscle strength and improve the quality of life of candidates for liver transplantation.METHODS: Twenty-three candidates for liver transplantation participated in the control group and 14 made up the intervention group. The control group consisted of 18 men and 5 women, body mass index(BMI) 27.3 ± 4.5 kg/m2 and Model for End-Stage Liver Disease(MELD) 18.2 ± 6.1. The intervention group consisted of 11 men and 3 women, BMI 28.6 ± 5.4 kg/m2 and MELD 18 ± 4.5. The presence or absence of ascites was identified in the first patient evaluation and after three months. We evaluated maximal inspiratory pressure(MIP) and maximal expiratory pressure, spirometry, root mean square(RMS) of diaphragm and rectus abdominis, and the quality of life. The exercises were performed daily by patients at home for three months and were supervised at distance monthly. The manual consisted of diaphragmatic breathing exercises, diaphragmatic isometric exercise, Threshold IMT®, lifting upper limbs with a bat and strengthening the abdomen. RESULTS: There was significant difference(P = 0.01) between the first(initial) and the third month(final) MIP in the control group and in the intervention group, but there was no difference(P = 0.45) between the groups.The RMS of the diaphragm was lower(P = 0.001) and the functional capacity was higher(P = 0.006) in the intervention group compared to the control. The general health and mental health domains received higher scores after three months in the control group(P = 0.01) and the intervention group(P = 0.004), but there was no significant difference between them. The comparison between the presence of initial ascites with the presence of ascites was performed after three months in the control group(P = 0.083) and intervention group(P = 0.31). There was no significant difference, in relation to the presence of ascites after three months between groups(P = 0.21). In the intervention group, patients with ascites at the end of the time period had decreased scores on the social aspects SF-36 domain(P = 0.023) compared to those who had no ascites. CONCLUSION: The proposed exercises provide an increase in the inspiratory muscle strength and improve functional capacity, consequently bettering the quality of life of liver disease patients.Vivian Limongi Daniele Costa Dos Santos Aurea Maria de Oliveira da Silva Ilka de Fátima Santana Ferreira Boin Raquel Silveira Bello Stucchi 2016World Journal of Transplantation2016,6,2:3
10Cirrhosis in children and adolescents: An overview显示文摘Several conditions, especially chronic liver diseases, can lead to cirrhosis in children and adolescents. Most cases in clinical practice are caused by similar etiologies. In infants, cirrhosis is most often caused by biliary atresia and genetic-metabolic diseases, while in older children, it tends to result from autoimmune hepatitis,Wilson's disease, alpha-1-antitrypsin deficiency and primary sclerosing cholangitis. The symptoms of cirrhosis in children and adolescents are similar to those of adults. However, in pediatric patients, the first sign of cirrhosis is often poor weight gain. The complications of pediatric cirrhosis are similar to those observed in adult patients, and include gastrointestinal bleeding caused by gastroesophageal varices, ascites and spontaneous bacterial peritonitis. In pediatric patients, special attention should be paid to the nutritional alterations caused by cirrhosis, since children and adolescents have higher nutritional requirements for growth and development. Children and adolescents with chronic cholestasis are at risk for several nutritional deficiencies. Malnutrition can have severe consequences for both pre- and post-liver transplant patients. The treatment of cirrhosis-induced portal hypertension in children and adolescents is mostly based on methods developed for adults. The present article will review the diagnostic and differential diagnostic aspects of end-stage liver disease in children, as well as the major treatment options for this condition.Raquel Borges Pinto Ana Claudia Reis Schneider Themis Reverbel da Silveira 2015World Journal of Hepatology2015,7,3:3
11Lactobacillus bulgaricus inhibits colitis-associated cancer via a negative regulation of intestinal inflammation in azoxymethane/dextran sodium sulfate model显示文摘BACKGROUND Colitis-associated cancer(CAC)accounts for 2%-3%of colorectal cancer(CRC)cases preceded by inflammatory bowel diseases(IBD)such as Crohn's disease and ulcerative colitis.Intestinal microbiota has been reported to play a central role in the pathogenesis of IBD and CAC.Recently,numerous prebiotics and probiotics have being investigated as antitumor agents due to their capacity to modulate inflammatory responses.Previous studies have indicated that lactic acid bacteria could be successfully used in managing sporadic CRC,however little is known about their role in CAC.AIM To investigate the effect of the probiotic Lactobacillus bulgaricus(L.bulgaricus)during the development of an experimental model of colitis associated colon cancer(CAC).METHODS C57BL/6 mice received an intraperitoneal injection of azoxymethane(10 mg/kg),followed by three cycles of sodium dextran sulphate diluted in water(5%w/v).Probiotic group received daily L.bulgaricus.Intestinal inflammation was determined by scoring clinical signs.Cytokines levels were determined from colon and/or tumor samples by ELISA BD OptEIATM kits.The level of significance was set at P<0.05.Graphs were generated and statistical analysis performed using the software GraphPad Prism 6.0.RESULTS L.bulgaricus treatment inhibited of total tumor volume and mean size of tumors.In addition,the probiotic also attenuated the clinical signs of intestinal inflammation inducing a decrease in intestinal and tumor levels of IL-6,TNF-α,IL-17,IL-23 and IL-1β.CONCLUSION Our results suggest a potential chemopreventive effect of probiotic on CAC.L.bulgaricus regulates the inflammatory response and preventing CAC.Denise Sayuri Calheiros Silveira Luciana Chain Veronez Luis Carlos Lopes-Junior Elen Anatriello Mariangela Ottoboni Brunaldi Gabriela Pereira-da-Silva 2020World Journal of Gastroenterology2020,26,43:3
12Starch Digestibility and Physicochemical and Cooking Properties of Irradiated Rice Grains显示文摘This study evaluated the starch digestibility, physicochemical properties and cooking characteristics of polished rice(varieties IRGA417 and IAC202) subjected to the doses of 0(as the control), 1, 2 and 5 k Gy of gamma radiation. The highest dose decreased the apparent amylose content, peak viscosity, water absorption and volume expansion. Irradiation increased the solid loss by 119% and 187% for IAC202 and IRGA417, respectively, when comparing the higher dose with the control. For IAC202, irradiation decreased the rapidly digestible starch and increased the slowly digestible starch(SDS) and resistant starch(RS). IRGA417 showed an elevation of SDS and a reduction in RS. And 1 k Gy dose of gamma radiation generated the highest level of RS for both the two varieties and presented the smallest changes in other physicochemical and cooking properties.Luís Fernando POLESI Manoel Divino da MATTA JUNIOR Silene Bruder Silveira SARMENTO Solange Guidolin CANNIATTI-BRAZACA 2017Rice science2017,24,1:3
13Distribution of the P2X2 receptor and chemical coding in ileal enteric neurons of obese male mice(ob/ob)显示文摘AIM:To investigate the colocalization,density and profile of neuronal areas of enteric neurons in the ileum of male obese mice.METHODS:The small intestinal samples of male mice in an obese group(OG)(C57BL/6J ob/ob)and a control group(CG)(+/+)were used.The tissues were analyzed using a double immunostaining technique for immunoreactivity(ir)of the P2X2 receptor,nitric oxide synthase(NOS),choline acetyl transferase(ChAT)and calretinin(Calr).Also,we investigated the density and profile of neuronal areas of the NOS-,ChAT-and Calrir neurons in the myenteric plexus.Myenteric neurons were labeled using an NADH-diaphorase histochemical staining method.RESULTS:The analysis demonstrated that the P2X2receptor was expressed in the cytoplasm and in the nuclear and cytoplasmic membranes only in the CG.Neuronal density values(neuron/cm2)decreased 31%(CG:6579±837;OG:4556±407)and 16.5%(CG:7796±528;OG:6513±610)in the NOS-ir and calretininir neurons in the OG,respectively(P<0.05).Density of ChAT-ir(CG:6200±310;OG:8125±749)neurons significantly increased 31%in the OG(P<0.05).Neuron size studies demonstrated that NOS,ChAT,and Calr-ir neurons did not differ significantly between the CG and OG groups.The examination of NADH-diaphorase-positive myenteric neurons revealed an overall similarity between the OG and CG.CONCLUSION:Obesity may exert its effects by promoting a decrease in P2X2 receptor expression and modifications in the density of the NOS-ir,ChAT-ir and CalR-ir myenteric neurons.Márcia Sanae Mizuno Amanda Rabello Crisma Primavera Borelli Bárbara Tavares Schfer Mariana Póvoa Silveira Patricia Castelucci 2014World Journal of Gastroenterology2014,20,38:3
14Homocysteine, MTHFR 677C→T polymorphism, and risk of ischemic stroke: Results of a meta-analysis显示文摘P. J. Kelly J. Rosand J. P. Kistler V. E. Shih S. Silveira A. Plomaritoglou K. L. Furie 2002Neurology2002,,4:2
15Effects of Ischemia and Reperfusion on Subpopulations of Rat Enteric Neurons Expressing the P2X7 Receptor显示文摘Kelly Palombit Cristina Eusébio Mendes Wothan Tavares-de-Lima Mariana Póvoa Silveira Patricia Castelucci 2013Digestive Diseases and Sciences2013,,12:2
16Acute kidney injury and electrolyte disorders in COVID-19显示文摘Acute kidney injury(AKI)and electrolyte disorders are important complications of hospitalized coronavirus disease 2019(COVID-19)patients.AKI is thought to occur due to multiple pathophysiological mechanisms,such as multiple organ dysfunction(mainly cardiac and respiratory),direct viral entry in the renal tubules,and cytokine release syndrome.AKI is present in approximately one in every ten hospitalized COVID-19 patients.The incidence rates of AKI increase in patients who are admitted to the intensive care unit(ICU),with levels higher than 50%.Additionally,renal replacement therapy(RRT)is used in 7%of all AKI cases,but in nearly 20%of patients admitted to an ICU.COVID-19 patients with AKI are considered moderate-to-severe cases and are managed with multiple interdisciplinary conducts.AKI acts as a risk factor for mortality in severe acute respiratory syndrome coronavirus 2 infection,especially when RRT is needed.Electrolyte disorders are also common manifestations in hospitalized COVID-19 patients,mainly hyponatremia,hypokalemia,and hypocalcemia.Hyponatremia occurs due to a combination of syndrome of inappropriate secretion of antidiuretic hormone and gastrointestinal fluid loss from vomiting and diarrhea.When it comes to hypokalemia,its mechanism is not fully understood but may derive from hyperaldosteronism due to renin angiotensin aldosterone system overstimulation and gastrointestinal fluid loss as well.The clinical features of hypokalemia in COVID-19 are similar to those in other conditions.Hypocalcemia is the most common electrolyte disorder in COVID-19 and seems to occur because of vitamin D deficiency and parathyroid imbalance.It is also highly associated with longer hospital and ICU stay.Gabriel Martins Nogueira Noel Lucas Oliveira Rodrigues Silva Ana Flávia Moura Marcelo Augusto Duarte Silveira JoséA Moura-Neto 2022World Journal of Virology2022,11,5:2
17Early enteral nutrition with whey protein or casein in elderly patients with acute ischemic stroke: A double-blind randomized trial显示文摘José Eduardo de Aguilar-Nascimento Bruno Regis Prado Silveira Diana Borges Dock-Nascimento 2011Nutrition2011,,:2
18GTAW焊接过程中熔池发展的数值模拟及与实验结果的比较显示文摘用描述等离子弧和熔池中的流体流动和传热过程的数学模型对熔池的发展进行了数值模拟。模拟结果和文献中实验结果的比较表明 ,该数学模型能较好地预测熔池的形状和大小。杨雪峰 Aristeuda Silveira Neto Américo Scotti 2002四川大学学报(工程科学版)2002,34,6:2
19Facile and practical enantioselective synthesisof propargylic alcohols by direct addition of alkynes to aldehydes catalyzed by chiral disulfide-oxazolidine ligands 显示文摘Braga AL Appeh HR Silveira CC 2002Tetrahedron2002,58,10:1
20Pulmonary fungal infection 显示文摘Silveira F Paterson DL 2005Curt Opin Pulm Med2005,11,3:1
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