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412篇 您的检索式:作者名="Susan K"
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1Dysregulation of innate immunity in ulcerative colitis patients who fail anti-tumor necrosis factor therapy显示文摘AIM To study the innate immune function in ulcerative colitis(UC) patients who fail to respond to anti-tumor necrosis factor(TNF) therapy.METHODS Effects of anti-TNF therapy, inflammation and medications on innate immune function were assessed by measuring peripheral blood mononuclear cell(PBMC) cytokine expression from 18 inflammatory bowel disease patients pre- and 3 mo post-anti-TNF therapy. Toll-like receptor(TLR) expression and cytokine production post TLR stimulation was assessed in UC 'responders'(n = 12) and 'non-responders'(n = 12) and compared to healthy controls(n = 12). Erythrocyte sedimentation rate(ESR) and C-reactive protein(CRP) levels were measured in blood to assess disease severity/activity and inflammation. Pro-inflammatory(TNF, IL-1β, IL-6), immuno-regulatory(IL-10), Th1(IL-12, IFNγ) and Th2(IL-9, IL-13, IL-17A) cytokine expression was measured with enzyme-linked immunosorbent assay while TLR cellular composition and intracellular signalling was assessed with FACS.RESULTS Prior to anti-TNF therapy, responders and nonresponders had similar level of disease severity and activity. PBMC's ability to respond to TLR stimulation was not affected by TNF therapy, patient's severity of the disease and inflammation or their medication use. At baseline, non-responders had elevated innate but not adaptive immune responses compared to responders(P < 0.05). Following TLR stimulation, nonresponders had consistently reduced innate cytokine responses to all TLRs compared to healthy controls(P < 0.01) and diminished TNF(P < 0.001) and IL-1β(P < 0.01) production compared to responders. This innate immune dysfunction was associated with reduced number of circulating plasmacytoid dendritic cells(p DCs)(P < 0.01) but increased number of CD4+ regulatory T cells(Tregs)(P = 0.03) as well as intracellular accumulation of IRAK4 in non-responders following TLR-2,-4 and-7 activation(P < 0.001). CONCLUSION Reduced innate immunity in non-responders may explain reduced efficacy to anti-TNF therapy. These serological markers may prove useful in predicting the outcome of costly anti-TNF therapy.Angela C Baird Dominic Mallon Graham Radford-Smith Julien Boyer Thierry Piche Susan L Prescott Ian C Lawrance Meri K Tulic 2016World Journal of Gastroenterology2016,22,41:10
2No receptor stands alone: IgG B-cell receptor intrinsic and extrinsic mechanisms contribute to antibody memory显示文摘获得的免疫学的记忆是惹人注目的现象。致命的流行病通过 naï 扫; ve 人口,许多死但是幸存的那些从来不是 “攻击了 ― 两次;从未至少 fatally”,在 430 BCE 观察的历史学家修西得底斯。抗体记忆为对许多人的传染疾病的保护是批评的并且是的基础将近所有当前的人的疫苗。部分地,抗体记忆被编码为切换适应于不同地区生活的动物的免疫球蛋白(Ig ) 在对抗原的主要反应被产生并且产生的表示 G 记忆 B 房间快速,高亲密关系并且在有一样的抗原的挑战之上的 high-titered 抗体回答。IgG-B-cell 受体(BCR ) 并且导致抗原的 IgG-BCR 发信号怎么贡献记忆抗体回答,充分没被理解。在这评论,我们总结在抗体记忆在玩正在揭示细胞、分子的机制并且讨论怎么用不同试验性的途径学习的令人激动的新进展帮助将阐明 B 房间记忆的复杂现象。Yinsheng Xu Liling Xu Meng Zhao ChenGuang Xu Yilin Fan Susan K Pierce Wanli Liu 2014Cell Research2014,24,6:4
3Effects of pretreatment with clopidogrel and aspirin followed by long-term therapy in patients undergoing percutaneous coronary intervention: the PCI-CURE study显示文摘Shamir R Mehta Salim Yusuf Ron JG Peters Michel E Bertrand Basil S Lewis Madhu K Natarajan Klas Malmberg Hans-Jürgen Rupprecht Feng Zhao Susan Chrolavicius Ingrid Copland Keith AA Fox 2001The Lancet . 2001 (9281)2001,,9281:4
4伦理学与SARS:多伦多的教训显示文摘SARS的流行说明传染病在世界范围内流行是件多么容易的事,为了更好地应对下一次流行病,我们不仅要解决医学方面的问题,也同样需要解决伦理学方面的问题。Peter A Singer Solomon R Benatar Mark Bernstein Abdallah S Daar Bernard M Dickens Susan K MacRae Ross E G Upshur Linda Wright Randi Zlotnik Shaul 肖月 2004英国医学杂志中文版2004,7,4:3
5Shoot and root traits in drought tolerant maize(Zea mays L.) hybrids显示文摘This study aimed to investigate the differences in shoot and root traits, and water use and water use efficiency(WUE) in drought tolerant(DT) maize(Zea mays L.) hybrids under full and deficit irrigated conditions. A two-year greenhouse study was conducted with four hybrids(one conventional hybrid, 33D53AM, two commercial DT hybrids, P1151 AM, N75H, and an experimental hybrid, Exp HB) grown under two water regimes(I_(100) and I_(50), referring to 100 and 50% of evapotranspiration requirements). Under water stress, the hybids P1151 AM, N75, and Exp HB showed more drought tolerance and had either greater shoot dry weight or less dry weight reduction than the conventional hybrid(33 D53 AM). However, these three hybrids responded to water stress using different mechanisms. Compared with the conventional hybrid, the two commercial DT hybrids(P1151 AM and N75H) had a smaller leaf area, shoot dry weight, and root system per plant. As a result, these hybrids used less water but had a higher WUE compared with the conventional hybrid. In contrast, the experimental hybrid(ExpHB) produced more shoot biomass by silking stage at both irrigation levels than all other hybrids, but it had relatively lower WUE. The hybrids demonstrated different drought response mechanisms that may require different irrigation management strategies. More investigation and validation are needed under field conditions and in different soil types.ZHAO Jin XUE Qing-wu Kirk E Jessup HOU Xiao-bo HAO Bao-zhen Thomas H Marek XU Wen-wei Steven R Evett Susan A O'Shaughnessy David K Brauer 2018Journal of Integrative Agriculture2018,17,5:3
6Th1 cytokines promote T-cell binding to antigen-presenting cells via enhanced hyaluronan production and accumulation at the immune synapse显示文摘Hyaluronan(HA)production by dendritic cells(DCs)is known to promote antigen presentation and to augment T-cell activation and proliferation.We hypothesized that pericellular HA can function as intercellular‘glue’directly mediating T cell–DC binding.Using primary human cells,we observed HA-dependent binding between T cells and DCs,which was abrogated upon pre-treatment of the DCs with 4-methylumbelliferone(4-MU),an agent which blocks HA synthesis.Furthermore,T cells regulate HA production by DCs via T cell-derived cytokines in a T helper(Th)subset-specific manner,as demonstrated by the observation that cell-culture supernatants from Th1 but not Th2 clones promote HA production.Similar effects were seen upon the addition of exogenous Th1 cytokines,IL-2,interferon c(IFN-c)and tumor necrosis factor a(TNF-a).The critical factors which determined the extent of DC–T cell binding in this system were the nature of the pre-treatment the DCs received and their capacity to synthesize HA,as T-cell clones which were pre-treated with monensin,added to block cytokine secretion,bound equivalently irrespective of their Th subset.These data support the existence of a feedforward loop wherein T-cell cytokines influence DC production of HA,which in turn affects the extent of DC–T cell binding.We also document the presence of focal deposits of HA at the immune synapse between T-cells and APC and on dendritic processes thought to be important in antigen presentation.These data point to a pivotal role for HA in DC–T cell interactions at the IS.Paul L Bollyky Stephen P Evanko Rebecca P Wu Susan Potter-Perigo S Alice Long Brian Kinsella Helena Reijonen Kelly Guebtner Brandon Teng Christina K Chan Kathy R Braun John A Gebe Gerald T Nepom Thomas N Wight 2010Cellular & Molecular Immunology2010,7,3:3
7The constituent equation of piezoelectric bi- morphs显示文摘SMITS Jan G DALKE Susan I COONEY Thomas K 1991Sensors and Actuator A1991,28,1:2
8Patients undergoing infrainguinal bypass to treat atherosclerotic vascular disease are underprescribed cardioprotective medications: effect on graft patency, limb salvage, and mortality显示文摘Peter K Henke Susan Blackburn Mary C Proctor Jeri Stevens Debabrata Mukherjee Sanjay Rajagopalin Gilbert R Upchurch James C Stanley Kim A Eagle 2004Journal of Vascular Surgery2004,,:2
9Knowledge, perception and practices about malaria, climate change, livelihoods and food security among rural communities of central Tanzania显示文摘Background:Understanding the interactions between malaria and agriculture in Tanzania is of particular significance when considering that they are the major sources of illness and livelihoods.The objective of this study was to determine knowledge,perceptions and practices as regards to malaria,climate change,livelihoods and food insecurity in a rural farming community in central Tanzania.Methods:Using a cross-sectional design,heads of households were interviewed on their knowledge and perceptions on malaria transmission,symptoms and prevention and knowledge and practices as regards to climate change and food security.Results:A total of 399 individuals(mean age=39.8±15.5 years)were interviewed.Most(62.41%)of them had attained primary school education and majority(91.23%)were involved in crop farming activities.Nearly all(94.7%)knew that malaria is acquired through a mosquito bite.Three quarters(73%)reported that most people get sick from malaria during the rainy season.About 50%of the respondents felt that malaria had decreased during the last 10 years.The household coverage of insecticide treated mosquito nets(ITN)was high(95.5%).Ninety-six percent reported to have slept under a mosquito net the previous night.Only one in four understood the official Kiswahili term(Mabadiliko ya Tabia Nchi)for climate change.However,there was a general understanding that the rain patterns have changed in the past 10 years.Sixty-two percent believed that the temperature has increased during the same period.Three quarters of the respondents reported that they had no sufficient production from their own farms to guarantee food security in their household for the year.Three quarters(73.0%)reported to having food shortages in the past five years.About half said they most often experienced severe food shortage during the rainy season.Conclusion:Farming communities in Kilosa District have little knowledge on climate change and its impact on malaria burden.Food insecurity is common and community-based strategies to mitigate this need to be established.The findings call for an integrated control of malaria and food insecurity interventions.Benjamin K Mayala Carolyn A Fahey Dorothy Wei Maria M Zinga Venera M Bwana Tabitha Mlacha Susan F Rumisha Grades Stanley Elizabeth H Shayo Leonard EG Mboera 2015Infectious Diseases of Poverty2015,4,1:2
10Characterization of Fusobacterium nucleatum ATCC 23726 adhesins involved in strain-specific attachment to Porphyromonas gingivalis显示文摘Bacterial adherence is an essential virulence factor in pathogenesis and infection. Fusobacterium nucleatum has a central role in oral bio?lm architecture by acting as a bridge between early Gram-positive and late Gram-negative colonizers that do not otherwise adhere to each other. In this study, we survey a key adherence interaction of F. nucleatum with Porphyromonas gingivalis, and present evidence that multiple fusobacterial adhesins have a role in the attachment of F. nucleatum ATCC 23726 to P. gingivalis in a highly strain-dependent manner. Interaction between these species displayed varying sensitivities to arginine,galactose and lactose. Arginine was found to hamper coaggregation by at least 62% and up to 89% with several P. gingivalis strains and galactose inhibition ranged from no inhibition up to 58% with the same P. gingivalis strains. Lactose consistently inhibited F. nucleatum interaction with these P. gingivalis strains ranging from 40% to 56% decrease in coaggregation. Among the adhesins involved are the previously described Fap2 and surprisingly, Rad D, which was described in an earlier study for its function in attachment of F. nucleatum to Gram-positive species. We also provide evidence for the presence of at least one additional adhesin that is sensitive to arginine but unlike Fap2 and Rad D, is not a member of the autotransporter family type of fusobacterial large outer membrane proteins. The strain-speci?c binding pro?le of multiple fusobacterial adhesins to P. gingivalis highlights the heterogeneity and complexity of interspecies interactions in the oral cavity.Jane Park Bhumika Shokeen Susan K Haake Renate Lux 2016International Journal of Oral Science2016,8,3:2
11Flexible transgastric peritoneoscopy: a novel approach to diagnostic and therapeutic interventions in the peritoneal cavity显示文摘Anthony N Kalloo Vikesh K Singh Sanjay B Jagannath Hideaki Niiyama Susan L Hill Cheryl A Vaughn Carolyn A Magee Sergey V Kantsevoy 2004Gastrointestinal Endoscopy2004,,1:2
12Incidental non-benign gallbladder histopathology after cholecystectomy in an United Kingdom population: Need for routine histological analysis?显示文摘AIM To analyse the range of histopathology detected in the largest published United Kingdom series of cholecystectomy specimens and to evaluate the rational for selective histopathological analysis.METHODS Incidental gallbladder malignancy is rare in the United Kingdom with recent literature supporting selective histological assessment of gallbladders after routine cholecystectomy.All cholecystectomy gallbladder specimens examined by the histopathology department at our hospital during a five year period between March 2008 and March 2013 were retrospectively analysed.Further data was collected on all specimens demonstrating carcinoma,dysplasia and polypoid growths.RESULTS The study included 4027 patients.The majority(97%) of specimens exhibited gallstone or cholecystitis related disease.Polyps were demonstrated in 44(1.09%),the majority of which were cholesterol based(41/44).Dysplasia,ranging from low to multifocal high-grade was demonstrated in 55(1.37%).Incidental primary gallbladder adenocarcinoma was detected in 6 specimens(0.15%,5 female and 1 male),and a single gallbladder revealed carcinoma in situ(0.02%).This large single centre study demonstrated a full range of gallbladder disease from cholecystectomy specimens,including more than 1% neoplastic histology and two cases of macroscopically occult gallbladder malignancies.CONCLUSION Routine histological evaluation of all elective and emergency cholecystectomies is justified in a United Kingdom population as selective analysis has potential to miss potentially curable life threatening pathology.Krashna Patel Khaled Dajani Satheesh Iype Nikolaos A Chatzizacharias Saranya Vickramarajah Susan Davies Rebecca Brais Siong S Liau Simon Harper Asif Jah Raaj K Praseedom Emmanuel L Huguet 2016World Journal of Gastrointestinal Surgery2016,8,10:2
13Quantification of XPA gene expression levels in human and mouse cell lines by competitive RT-PCR显示文摘Susan K L James E C 1997Mutaion Reasearch1997,387,1:1
14Modularity: Implications for imitation, innovation and sustained advantage 显示文摘FRITS K PIL SUSAN K COHEN 2006Academy of Management Review2006,31,4:1
15isomers of dicaffeoylquinic acid by Discriminating between the six LC-MSn 显示文摘Michsel NC Susan K Nikolai K 2005Journal Agricultural and Food Chemistry2005,53,10:1
16Genome sequence and analysis of the soil cellulolytic actinomyeete Thermobifidafusca YX 显示文摘Athanasios L Konstantinos M Natalia I lain A Miriam L Genevieve D Michele M Alia L Susan L Alex C Paul R David BW Nikos K 2007J Bacteriol2007,189,6:1
17Growth of anaerobic rumen fungi on defined and semi-defined media lacking rumen fluid显示文摘Susane E L Michael K T Anthony P J T 1985J General Microbiology1985,131,:1
18Development and implementation of a carboplatin desensitization protocol for children with neurofibromatosis, type 1 and hypersensitivity reactions in an outpatient oncology clinic 显示文摘Susan K Ogle MSN Margaret M Rose 2002J Pediat Oncol Nursing2002,19,4:1
19Fretting wear of Ti-48Al-2Cr-2Nb显示文摘Miyoshi K Susan B A Draper L 2003Tribol Int2003,36,2:1
20The pharmacokinetics of S-(-) equol administered as SE5-OH tablets to healthy postmenopausal women 显示文摘SETCHELL K D R ZHAO Xueheng SUSAN E 2009J Nutr2009,139,:1
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