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1三七皂甙对血管平滑肌α受体引起^(45)Ca外溢与内流的影响显示文摘在血管平滑肌,三七总皂甙明显减少苯肾上腺素引起的^(45)Ca内流量,不影响高钾引起的^(45)Ca内流;而硝苯吡啶几乎完全阻断后一种的^(45)Ca内流。三七总皂甙不抑制^(45)Ca外溢。结果表明,三七总皂甙能特异阻断血管平滑肌α受体操纵的Ca^(2+)通道而不影响胞内Ca^(2+)释放过程。关永源 陈克敏 孙家钧 关超然 Daniel E E 1990中国药理学通报1990,6,4:50
2IDH突变的弥漫性和间变性星形细胞瘤具有相同的发病年龄和极小的生存期差异:一个WHO分级的问题显示文摘WHO(2007)中枢神经系统肿瘤分类中列出WHOⅡ级的弥漫性星形细胞瘤(A Ⅱ WHO 2007)和WHOⅢ级的间变性星形细胞瘤( AA Ⅲ WHO 2007)之间的区别。 A Ⅱ WHO (2007)的患者与AA Ⅲ WHO (2007)的患者相比显著年轻、生存期明显较长。迄今为主,分级和分类仅仅依靠形态学而未考虑IDH这一预后相关分子标记的状态。作者发现,对于IDH突变的星形细胞瘤而言,WHO(2007)的分级系统对预后的提示意义较差。检测来自3个独立的病例系列共1360例成人弥漫性星形细胞肿瘤的年龄分布和生存时间,其中包括683例Ⅱ级IDH突变型星形细胞瘤( A Ⅱ IDHmut)、562例IDH突变型的间变性星形细胞瘤( AA Ⅲ IDHmut)和115例IDH 突变的胶质母细胞瘤( GBM IDHmut )。 A ⅡIDHmut和 AA Ⅲ IDHmut的患者显示具有相同的发病年龄(36~37岁),而两级别之间的生存时间差异小于 WHO (2007)的报道(A Ⅱ IDHmut 中位生存时间为10.9年,AAⅢIDHmut为9.3年)。作者分析提示AⅡWHO2007与AAⅢ WHO2007年龄分布和生存时间的差异主要取决于 IDH非突变型肿瘤所占的比例。这些数据结果对目前实行的星形细胞瘤分级和危险分层提出了重大挑战,并可能对 IDH突变型星形细胞瘤的治疗管理产生深远的影响。David E Yasin M Daniel S 李晓玲 王行富 2015临床与实验病理学杂志2015,31,7:17
3Design of 16S rRNA gene primers for 454 pyrosequencing of the human foregut microbiome显示文摘AIM:To design and validate broad-range 16S rRNA primers for use in high throughput sequencing to classify bacteria isolated from the human foregut microbiome.METHODS:A foregut microbiome dataset was constructed using 16S rRNA gene sequences obtained from oral,esophageal,and gastric microbiomes produced by Sanger sequencing in previous studies represented by 219 bacterial species.Candidate primers evaluated were from the European rRNA database.To assess the effect of sequence length on accuracy of classification,16S rRNA genes of various lengths were created by trimming the full length sequences.Sequences spanning various hypervariable regions were selected to simulate the amplicons that would be obtained using possible primer pairs.The sequences were compared with full length 16S rRNA genes for accuracy in taxonomic classification using online software at the Ribosomal Database Project (RDP).The universality of the primer set was evaluated using the RDP 16S rRNA database which is comprised of 433 306 16S rRNA genes,represented by 36 phyla.RESULTS:Truncation to 100 nucleotides(nt)downstream from the position corresponding to base 28 in the Escherichia coli 16S rRNA gene caused misclassification of 87(39.7%)of the 219 sequences,compared with misclassification of only 29(13.2%)sequences with truncation to 350 nt.Among 350-nt sequence reads within various regions of the 16S rRNA gene,the reverse read of an amplicon generated using the 343F/798R primers had the least(8.2%)effect on classification.In comparison,truncation to 900 nt mimicking single pass Sanger reads misclassified 5.0%of the 219 sequences.The 343F/798R amplicon accurately assigned 91.8%of the 219 sequences at the species level.Weighted by abundance of the species in the esophageal dataset,the 343F/798R amplicon yielded similar classification accuracy without a significant loss in species coverage(92%).Modification of the 343F/798R primers to 347F/803R increased their universality among foregut species.Assuming that a typicalpolymerase chain reaction can tolerate 2 mismatches between a primer and a template,the modified 347F and 803R primers should be able to anneal 98%and 99.6%of all 16S rRNA genes in the RDP database.CONCLUSION:347F/803R is the most suitable pair of primers for classification of foregut 16S rRNA genes but also possess universality suitable for analyses of other complex microbiomes.Carlos W Nossa William E Oberdorf Jφrn A Aas Bruce J Paster Todd Z DeSantis Eoin L Brodie Daniel Malamud Michael A Poles Zhiheng Pei 2010World Journal of Gastroenterology2010,16,33:16
4单髁与全膝关节置换治疗内侧间室膝骨关节炎:5年假体在位率比较显示文摘背景:单髁置换越来越多的被应用于治疗单纯内侧胫股间室型膝关节骨关节炎。目的:比较膝关节单髁置换与全膝关节置换对膝关节单纯内侧间室骨关节炎的修复效果。方法:纳入单纯内侧间室型膝关节骨关节炎患者109例,根据修复方式分为两组,单髁置换组41例,全膝关节置换组68例。比较两组患者的平均住院时间、置换后并发症发生率、身体健康总评分、精神健康总评分、牛津膝关节评分以及置换后5年假体在位率。结果与结论:单髁置换组患者平均住院时间(4.21±2.44)d,较全膝关节置换组(6.11±2.23)d短(P=0.001)。两组患者置换后并发症发生率、身体健康总评分、精神健康总评分、牛津膝关节评分等方面差异均无显著性意义(P>0.05)。置换后5年,单髁置换组假体在位率(90%)较全膝关节置换组(100%)低(P<0.05)。提示对于单纯内侧胫股间室型膝关节骨关节炎患者,单髁置换与全膝关节置换具有相似的修复效果,但单髁置换后5年假体在位率稍低。梁宁 Samuel Yih Shyan Wong Nick Clement Deborah MacDonald Daniel E Porter 2015中国组织工程研究2015,19,53:12
5Role of the endothelium in inflammatory bowel diseases显示文摘Inflammatory bowel diseases(IBD) are a complex group of diseases involving alterations in mucosal immunity and gastrointestinal physiology during both initiation and progressive phases of the disease.At the core of these alterations are endothelial cells,whose continual adjustments in structure and function coordinate vascular supply,immune cell emigration,and regulation of the tissue environment.Expansion of the endothelium in IBD(angiogenesis),mediated by inflammatory growth factors,cytokines and chemokines,is a hallmark of active gut disease and is closely related to disease severity.The endothelium in newly formed or inflamed vessels differs from that in normal vessels in the production of and response to inflammatory cytokines,growth factors,and adhesion molecules,altering coagulant capacity,barrier function and blood cell recruitment in injury.This review examines the roles of the endothelium in the initiation and propagation of IBD pathology and distinctive features of the intestinal endothelium contributing to these conditions.Walter E Cromer J Michael Mathis Daniel N Granger Ganta V Chaitanya J Steven Alexander 2011World Journal of Gastroenterology2011,17,5:10
6三七皂甙对血管平滑肌上受体操纵Ca^(2+)通道的特异性作用(英文)显示文摘三七皂甙能明显抑制狗肠系膜动脉及大隐静脉α肾上腺素能受体触发的收缩反应及^(45)Ca内流(从0.36±0.03降至0.14±0.05μmol·g^(-1)组织湿重),但对高K^+引起的Ca^(2+)内流无影响。三七皂甙不影响Ca^(2+)释放及受体的亲和力。提示三七皂甙具有特异性阻断受体操纵Ca^(2+)通道的特性,对电位依赖性Ca^(2+)通道无作用。关永源 关超然 贺华 孙家钧 Edwin E DANIEL 1994中国药理学报1994,15,5:9
7Clinical and histopathological correlations of fecal calprotectin release in colorectal carcinoma显示文摘AIM:To determine calprotectin release before and after colorectal cancer operation and compare it to tumor and histopathological parameters.METHODS:The study was performed on patients with diagnosed colorectal cancer admitted for operation.Calprotectin was measured in a single stool sample before and three months after the operation using an enzymelinked immunosorbent assay(ELISA).Calprotectin levels greater than or equal to 50μg/g were considered positive.The compliance for collecting stool samples was assessed and the value of calprotectin was correlated to tumor and histopathological parameters of intra-and peri-tumoral inflammation.Surgical specimens were fixed in neutral buffered formalin and stained with hematoxylin and eosin.Staging was performed according to the Dukes classification system and the 7th edition tumor node metastasis classification system.Intra-and peri-tumoral inflammation was graded according to the Klintrup criteria.Immunohistochemical quantification was performed for MPO,CD45R0,TIA-1,CD3,CD4,CD8,CD57,and granzyme B.Statistical significance was measured using Wilcoxon signed rank test,Kruskal Wallis test and Spearman’s rank correlation coefficient as appropriate.RESULTS:Between March 2009 and May 2011,80 patients with colorectal cancer(46 men and 34 women,with mean age of 71±11.7 years old)were enrolled in the study.Twenty-six patients had rectal carcinoma,29 had left-side tumors,23 had right-side tumors,and2 had bilateral carcinoma.In total,71.2%of the patients had increased levels of calprotectin before the operation(median 205μg/g,range 50-2405μg/g)and experienced a significant decrease three months after the operation(46μg/g,range 10-384μg/g,P<0001).The compliance for collecting stool samples was 89.5%.Patients with T3 and T4 tumors had significantly higher values than those with T1 and T2 cancers(P=0.022).For all other tumor parameters(N,M,G,L,V,Pn)and location,no significant difference in calprotectin concentration was found.Furthermore,the calprotectin levels and histological grading of both peri-and intra-tumoral inflammation was not correlated.Additional testing with specific markers for lymphocytes and neutrophils also revealed no statistically significant correlation.CONCLUSION:Fecal calprotectin decreases significantly after colorectal cancer operation.Its value depends exclusively on the individual T-stage,but not on other tumor or histopathological parameters.Frank Serge Lehmann Francesca Trapani Ida Fueglistaler Luigi Maria Terracciano Markus von Flüe Gieri Cathomas Andreas Zettl Pascal Benkert Daniel Oertli Christoph Beglinger 2014World Journal of Gastroenterology2014,20,17:6
8c-Met signaling in the development of tumorigenesis and chemoresistance: Potential applications in pancreatic cancer显示文摘Pancreatic ductal adenocarcinoma is the 4th leading cause of cancer deaths in the United States.The majority of patients are candidates only for palliative chemotherapy,which has proven largely ineffective in halting tumor progression.One proposed mechanism of chemoresistance involves signaling via the mesenchymalepithelial transition factor protein(MET),a previously established pathway critical to cell proliferation and migration.Here,we review the literature to characterize the role of MET in the development of tumorigenesis,metastasis and chemoresistance,highlighting the potential of MET as a therapeutic target in pancreatic cancer.In this review,we characterize the role of c-Met in the development of tumorigenesis,metastasis and chemoresistance,highlighting the potential of c-Met as a therapeutic target in pancreatic cancer.Daniel Delitto Eva Vertes-George Steven J Hughes Kevin E Behrns Jose G Trevino 2014World Journal of Gastroenterology2014,20,26:6
9Microbiome as mediator: Do systemic infections start in the gut?显示文摘The intestinal microbiome is emerging as a crucial mediator between external insults and systemic infections. New research suggests that our intestinal microorganisms contribute to critical illness and the development of non-gastrointestinal infectious diseases.Common pathways include a loss of fecal intestinal bacterial diversity and a disproportionate increase in toxogenic bacterial species. Therapeutic interventions targeting the microbiome- primarily probiotics- have yielded limited results to date. However, knowledge in this area is rapidly expanding and microbiome-based therapy such as short-chain fatty acids may eventually become a standard strategy for preventing systemic infections in the context of critical illness.Melissa Latorre Suneeta Krishnareddy Daniel E Freedberg 2015World Journal of Gastroenterology2015,21,37:5
10An ingredient for the elixir of youth显示文摘Rebecca E Andersen 2014Cell Research2014,24,12:5
11Stable ischemic heart disease in the older adults显示文摘1 Introduction Ischemic heart disease is caused by atherosclerotic and/or thrombotic obstruction of coronary arteries.Clinical spectrum of ischemic heart disease expands from asymptomatic atherosclerosis of coronary arteries to acute coronary syndromes (ACS) including unstable angina,acute myocardial infarction (non-ST elevation myocardial infarction and ST elevation myocardial infarction).Xuming DAI Jan Busby-Whitehead Daniel E Forman Karen P Alexander 2016Journal of Geriatric Cardiology2016,13,2:5
12Neoadjuvant therapy for pancreas cancer: Past lessons and future therapies显示文摘Pancreatic adenocarcinoma remains a most deadly malignancy, with an overall 5-year survival of 5%. A subset of patients will be diagnosed with potentially resectable disease, and while complete surgical resection provides the only chance at cure, data from trials of postoperative chemoradiation and/or chemotherapy demonstrate a modest survival advantage over those patients who undergo resection alone. As such, most practitioners believe that completion of multimodality therapy is the optimal treatment. However, the sequence of surgery, chemotherapy and radiation therapy is frequently debated, as patients may benefit from a neoadjuvant approach by initiating chemotherapy and/or chemoradiation prior to resection. Here we review the rationale for neoadjuvant therapy, which includes a higher rate of completion of multimodality therapy, minimizing the risk of unnecessary surgical resection for patients who develop early metastatic disease, improved surgical outcomes and the potential for longer overall survival. However, there are no prospective, randomized studies of the neoadjuvant approach compared to a surgeryfirst strategy; the established and ongoing investigations of neoadjuvant therapy for pancreatic cancer are discussed in detail. Lastly, as the future of therapeutic regimens is likely to entail patient-specific genetic and molecular analyses, and the treatment that is best applied based on those data, a review of clinically relevant biomarkers in pancreatic cancer is also presented.Jeffrey M Sutton Daniel E Abbott 2014World Journal of Gastroenterology2014,20,42:5
13A 10-year review of a minimally invasive technique for the correction of pectus excavatum显示文摘Donald Nuss Robert E Kelly Daniel P Croitoru Michael E Katz 1998Journal of Pediatric Surgery1998,,4:4
14Antidiarrheal activity of Pterocarpus erinaceus methanol leaf extract in experimentally-induced diarrhea显示文摘Objective:To investigate the antidiarrheal activity of the methanol leaf extract of Pterocarpus erinaceus in vivo.Methods:The methanol leaf extract of Ptemcarpus erinaceus was evaluated using different doses(100,200 and 400 mg/kg body weight) orally for antidiarrheal activity using castor oil-induced diarrhea,charcoal meal transit lime and castor oil-induced enteropooling in different groups of albino Wistar mice.The activity of the extract at different doses were compared to diphenoxylate(3 mg/kg) and atropine sulphate(3 mg/kg) which were used as standard reference drugs and also to the distilled water administered negative control group of mice.Results:The extract at the doses used caused a significant(P< 0.01) reduction in the wet faeces passed by the mice in the castor oil-induced diarrhea,decreased the distance travelled by the charcoal meal by up to 54.8%and also caused a dose dependent and significant(P< 0.001) reduction in the intraluminal fluid accumulation in the castor oil-induced enteropooling. Conclusions:Our results indicate that Pterocarpits erinaceus extract produced significant antidiarrheal activity and the action may attribute to inhibition of gastrointestinal movement and fluid secretion.Ezeja Maxwell I Ezeigbo Ihechiluru I Madubuike Kelechi G Udeh Nkiru E Ukweni Iheanacho A Akomas Stella C Ifenkwe Daniel C 2012Asian Pacific Journal of Tropical Medicine2012,5,2:3
15To stay or to leave: Stem cells and progenitor cells navigating the S1P gradient显示文摘Most hematopoietic stem progenitor cells (HSPCs) reside in bone marrow (BM), but a small amount of HSPCs have been found to circulate between BM and tissues through blood and lymph. Several lines of evidence suggest that sphingosine-1-phosphate (S1P) gradient triggers HSPC egression to blood circulation after mobilization from BM stem cell niches. Stem cells also visit certain tissues. After a temporary 36 h short stay in local tissues, HSPCs go to lymph in response to S1P gradient between lymph and tissue and eventually enter the blood circulation. S1P also has a role in the guidance of the primitive HSPCs homing to BM in vivo, as S1P analogue FTY720 treatment can improve HSPC BM homing and engraftment. In stress conditions, various stem cells or progenitor cells can be attracted to local injured tissues and participate in local tissue cell differentiation and tissue rebuilding through modulation the expression level of S1P1, S1P2 or S1P3 receptors. Hence, S1P is important for stem cells circulation in blood system to accomplish its role in body surveillance and injury recovery.Andrew Hsu Jen-Fu Lee Daniel E Cramer Menq-Jer Lee 2011World Journal of Biological Chemistry2011,2,1:3
16Prognostic value of pre-treatment F-18-FDG PET-CT in patients with hepatocellular carcinoma undergoing radioembolization显示文摘AIM To evaluate the value of pre-treatment 18F-FDG PET/CT in patients with HCC following liver radioembolization.METHODS We identified 34 patients with HCC who underwent an FDG PET/CT scan prior to hepatic radioembolization at our institution between 2009 and 2013. Patients wereseen in clinic one month after radioembolization and then at 2-3 mo intervals. We assessed the influence of FDG tumor uptake on outcomes including local liver control(LLC), distant liver control(DLC), time to distant metastases(DM), progression free survival(PFS) and overall survival(OS).RESULTS The majority of patients were males(n = 25, 74%), and had Child Pugh Class A(n = 31, 91%), with a median age of 68 years(46-84 years). FDG-avid disease was found in 19(56%) patients with SUVmax ranging from 3 to 20. Female patients were more likely to have an FDG-avid HCC(P = 0.02). Median follow up of patients following radioembolization was 12 months(1.2-62.8 mo). FDG-avid disease was associated with a decreased 1 year LLC, DLC, DM and PFS(P < 0.05). Using multivariate analysis, FDG avidity predicted for LLC, DLC, and PFS(all P < 0.05).CONCLUSION In this retrospective study, pre-treatment HCC FDGavidity was found to be associated with worse LLC, DLC, and PFS following radioembolization. Larger studies are needed to validate our initial findings to assess the role of F-18-FDG PET/CT scans as biomarker for patients with HCC following radioembolization.Yazan Abuodeh Arash O Naghavi Kamran A Ahmed Puja S Venkat Youngchul Kim Bela Kis Junsung Choi Benjamin Biebel Jennifer Sweeney Daniel A Anaya Richard Kim Mokenge Malafa Jessica M Frakes Sarah E Hoffe Ghassan El-Haddad 2016World Journal of Gastroenterology2016,22,47:3
17Playing Well on the Data FAIRground:Initiatives and Infrastructure in Research Data Management显示文摘Over the past five years,Elsevier has focused on implementing FAIR and best practices in data management,from data preservation through reuse.In this paper we describe a series of efforts undertaken in this time to support proper data management practices.In particular,we discuss our journal data policies and their implementation,the current status and future goals for the research data management platform Mendeley Data,and clear and persistent linkages to individual data sets stored on external data repositories from corresponding published papers through partnership with Scholix.Early analysis of our data policies implementation confirms significant disparities at the subject level regarding data sharing practices,with most uptake within disciplines of Physical Sciences.Future directions at Elsevier include implementing better discoverability of linked data within an article and incorporating research data usage metrics.Danielle Descoteaux Chiara Farinelli Marina Soares e Silva Anita de Waard 2019Data Intelligence2019,1,4:3
18Women in the boardroom and their impact on governance and performance显示文摘Renée B. Adams Daniel Ferreira 2009Journal of Financial Economics2009,,2:3
19Ron receptor-dependent gene regulation in a mouse model of endotoxin-induced acute liver failure显示文摘BACKGROUND:Prior experimentation has shown that loss of the tyrosine kinase(TK) signaling domain of the Ron receptor leads to marked hepatocyte protection in a model of lipopolysaccharideinduced acute liver failure(ALF) in D-galactosamine(GalN)sensitized mice.The aim of this study was to identify the role of Ron in the regulation of hepatic gene expression.METHODS:Microarray analyses were performed on liver RNA isolated sequentially from wild-type(WT) and TK-/mice during the progression of ALF.Gene array data were validated using Western and immunohistochemistry analyses as well as with ex vivo culture systems.RESULTS:At baseline,101 genes were differentially expressed between WT and TK-/-livers,which regulate processes involved in hypoxia,proliferation,apoptosis and metabolism.One hour after ALF induction,WT livers exhibited increased cytokine expression compared to TK-/-livers,and after 4 hours,an induction of suppressor of cytokine signaling(SOCS) genes as well as JAK-STAT pathway activation were prominent in TK-/livers compared to controls.CONCLUSION:Our studies suggest a novel hepato-protective mechanism in Ron TK-/-mice wherein increased and sustained SOCS production and JAK-STAT activation in the hepatocyte may inhibit the destructive proinflammatory milieu and promote survival factors which blunt hepatic death and the ensuing development of ALF.Rishikesh M Kulkarni Louis W Kutcher William D Stuart Daniel J Carson Mike A Leonis Susan E Waltz 2012Hepatobiliary & Pancreatic Diseases International2012,11,4:3
20Quality Improvement Guidelines for the Treatment of Lower Extremity Deep Vein Thrombosis with Use of Endovascular Thrombus Removal显示文摘Suresh Vedantham Patricia E. Thorpe John F. Cardella Clement J. Grassi Nilesh H. Patel Hector Ferral Lawrence V. Hofmann Bertrand M. Janne d’Othée Vittorio P. Antonaci Elias N. Brountzos Daniel B. Brown Louis G. Martin Alan H. Matsumoto Steven G. Meranze 2006Journal of Vascular and Interventional Radiology2006,,3:3
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