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| 1 | Role of LPS/CD14/TLR4-mediated inflammation in necrotizing enterocolitis:Pathogenesis and therapeutic implications显示文摘AIM:To establish the roles of lipopolysaccharide (LPS)/CD14/toll-like receptor 4 (TLR4)-mediated inflammation in a rat model of human necrotizing enterocolitis (NEC).METHODS: Six pairs of intestinal samples from human NEC were collected before and after recovery for histological and molecular analysis of inflammatory cytokines and signaling components. In the rat NEC model, we isolated 10-cm jejunum segments and divided them into six groups (n=6) for sham operation, treatment with LPS, bowel distension, combined bowel distension and LPS stimulation, and two therapeutic groups. The potential eff icacy of a recombinant CD18 peptide and a monoclonal CD14 antibody was evaluated in the latter two groups. The serum and tissue levels of several inflammatory mediators were quantified by real-time polymerase chain reaction, ELISA and immunoblotting.RESULTS: Human acute phase NEC tissues displayed significant increases (P<0.05) in levels of TLR4, CD14, myeloid differentiation protein (MD)-2, tumor necrosis factor (TNF)-α and nuclear factor-κB when compared to those after recovery. The histological and inflammatory picture of human NEC was reproduced in rats that were treated with combined bowel distension and LPS, but not in the sham-operated and other control rats. Serum levels of interleukin-6 and TNF-α were also elevated. The NEC pathology was attenuated by treating the NEC rats with a monoclonal CD14 antibody or an LPS-neutralizing peptide.CONCLUSION:LPS and distension are required to produce the histological and inflammatory features of NEC. A potential treatment option is blocking LPS activation and leukocyte infi ltration. | Kwong L Chan Kwong F Wong John M Luk | 2009 | World Journal of Gastroenterology2009,15,38: | 17 |
| 2 | 绕正方形排列的顺排的四个圆柱的流动研究显示文摘本文通过采用激光诱导荧关技术(LIF),对按正方形排列、边长间距比为4的顺排的四个圆柱的层流绕流进行了流动可视化研究;同时,在Re=200的情况下,对该流场进行了PIV流场测量,两种实验结果吻合良好,显示的都是只在下游圆柱的后面才有漩涡脱落。可是,采用两维有限体积法离散N-S方程计算该流场与实验结果完全不符合,原因尚不清楚。 | 李景银 K Lam K T Chan R M C So | 2004 | 工程热物理学报2004,25,1: | 14 |
| 3 | Photochemical smog in China:scientific challenges and implications for air-quality policies显示文摘INTRODUCTION Severe air-pollution events in many parts of China pose a major threat to health and ecosystems[1].China’s air pollution is concentrated to economically developed areas,such as Beijing–Tianjin–Hebei(BTH)and Pearl–River–Delta(PRD)[2,3].The situation has received considerable attention in | Mattias Hallquist John Munthe Min Hu Tao Wang Chak K Chan Jian Gao Johan Boman Song Guo Asa M Hallquist Johan Mellqvist Jana Moldanova Ravi K Pathak Jan BC Pettersson Hakan Pleijel David Simpson Marie Thynell | 2016 | National Science Review2016,3,4: | 8 |
| 4 | Arthroscopic treatment options for irreparable rotator cuff tears of the shoulder显示文摘The management of patients with irreparable rotator cuff tears remains a challenge for orthopaedic surgeons with the final treatment option in many algorithms being either a reverse shoulder arthroplasty or a tendon transfer. The long term results of these procedures are however still widely debated, especially in younger patients. A variety of arthroscopic treatment options have been proposed for patients with an irreparable rotator cuff tear without the presence of arthritis of the glenohumeral joint. These include a simple debridement with or without a biceps tenotomy, partial rotator cuff repair with or without an interval slide, tuberplasty, graft interposition of the rotator cuff, suprascapular nerve ablation, superior capsule reconstruction and insertion of a biodegradable spacer(Inspace) to depress the humeral head. These options should be considered as part of the treatment algorithm in patients with an irreparable rotator cuff and could be used as either as an interim procedure, delaying the need for more invasive surgery in the physiologically young and active, or as potential definitive procedures in the medically unfit.The aim of this review is to highlight and summarise arthroscopic procedures and the results thereof currently utilised in the management of these challenging patients. | Cameron M Anley Samuel KL Chan Martyn Snow | 2014 | World Journal of Orthopedics2014,5,5: | 8 |
| 5 | Response to endoscopic therapy for biliary anastomotic strictures in deceased versus living donor liver transplantation显示文摘BACKGROUND:Endoscopic therapy has been successful in the management of biliary complications after both deceased donor liver transplantation(DDLT) and living donor liver transplantation(LDLT).LDLT is thought to be associated with higher rates of biliary complications,but there are few studies comparing the success of endoscopic management of anastomotic strictures between the two groups.This study aims to compare our experience in the endoscopic management of anastomotic strictures in DDLT versus LDLT.METHODS:This is a retrospective database review of all liver transplant patients undergoing endoscopic retrograde cholangiopancreatography(ERCP) after liver transplantation.The frequency of anastomotic stricture and the time to develop and to resolve anastomotic stricture were compared between DDLT and LDLT.The response of anastomotic stricture to endoscopic therapy was also analyzed.RESULTS:A total of 362 patients underwent liver transplantation between 2003 and 2011,with 125 requiring ERCP to manage biliary complications.Thirty-three(9.9%) cases of DDLT and 8(27.6%) of LDLT(P=0.01) were found to have anastomotic stricture.When comparing DDLT and LDLT,there was no difference in the mean time to the development of anastomotic strictures(98±17 vs 172±65 days,P=0.11),likelihood of response to ERCP [22(66.7%) vs 6(75.0%),P=0.69],mean time to the resolution of anastomotic strictures(268±77 vs 125±37 days,P=0.34),and the number of ERCPs required to achieve resolution(3.9±0.4 vs 4.7±0.9,P=0.38).CONCLUSIONS:Endoscopic therapy is effective in the majority of biliary complications relating to liver transplantation.Anastomotic strictures occur more frequently in LDLT compared with DDLT,with equivalent endoscopic treatment response and outcomes for both groups. | Calvin HY Chan Fergal Donnellan Michael F Byrne Alan Coss Mazhar Haque Holly Wiesenger Charles H Scudamore Urs P Steinbrecher Alan A Weiss Eric M Yoshida | 2013 | Hepatobiliary & Pancreatic Diseases International2013,12,5: | 7 |
| 6 | Immunity Genes and Susceptibility to Otitis Media:A Comprehensive Review显示文摘Otitis media(OM) is a middle ear infection associated with inflammation and pain.This disease frequently afflicts humans and is the major cause of hearing loss worldwide.OM continues to be one of the most challenging diseases in the medical field due to its diverse host targets and wide range of clinical manifestations.Substantial morbidity associated with OM is further exacerbated by high frequency of recurrent infections leading to chronic suppurative otitis media(CSOM).Children have greater susceptibility to,and thus,suffer most frequently from OM,which can cause significant deterioration in quality of life.Genetic factors have been demonstrated,in large part by twin and family studies,to be key determinants of OM susceptibility.In this review,we summarize the current knowledge on immunity genes and selected variants that have been associated with predisposition to OM.In particular,polymorphisms in innate immunity and cytokine genes have been strongly linked with the risk of developing OM.Future studies employing state-of-the-art technologies,including next-generation sequencing(NGS),will aid in the identification of novel genes associated with susceptibility to OM.This,in turn,will open up avenues for identifying high-risk individuals and designing novel therapeutic strategies based on precise targeting of these genes. | Rahul Mittal Giannina Robalino Robert Gerring Brandon Chan Denise Yan M'hamed Grati Xue-Zhong Liu | 2014 | Journal of Genetics and Genomics2014,41,11: | 5 |
| 7 | A Novel ABA Insensitive Mutant of Lotus japonicus with a Wilty Phenotype Displays Unaltered Nodulation Regulation显示文摘骆驼毛的织物感觉迟钝的异种, Beyma,作为屏蔽标准用根生长抑制从一张他们 mutagenesis 人口在莲花 japonicus MG-20 被孤立到应用骆驼毛的织物。(名字 Beyma 从澳大利亚的土著的语言被拿, Wagiman, beyma,意思枯竭) 因为一个主导的孟德尔的变化对骆驼毛的织物感觉迟钝,分离的稳定的异种导致了萌芽,植物的生长,有气孔的洞,以及生节的抑制。织物骆驼毛的织物层次是正常的,建议敏感而非生合成变化。它是慢成长的(5070% 野类型的 MG-20 ) 并且在组成附近的 wilty 显型与它的无能联系了调整有气孔的开。虽然显示出大量骆驼毛的织物感觉迟钝的显型,, Beyma 没当增加的骆驼毛的织物,数字和 patterning 不在时显示出小瘤数字控制的改变(然而并非尺寸) 在异种形成的小瘤类似于 MG-20 的。MG-20 的裂口根实验证明根的一个方面上的骆驼毛的织物的申请局部地然而并非全身地禁止了生节。我们建议那件骆驼毛的织物不直接涉及生节(AON ) 的全身的自动调整。 | Bandana Biswas Pick Kuen Chan Peter M Gresshoff | 2009 | Molecular Plant2009,2,3: | 4 |
| 8 | Increasing surface ozone concentrations in the background atmosphere of Southern China, 1994–2007显示文摘 | Wang T. Wei X. L. Ding A. J. Poon C. N. Lam K. S. Li Y. S. Chan L. Y. Anson M | 2009 | Atmospheric Chemistry and Physics2009,,175: | 3 |
| 9 | Comparative effectiveness of i-SCAN^(TM) and high-definition white light characterizing small colonic polyps显示文摘AIM:To evaluate accuracy of in vivo diagnosis of adenomatous vs non-adenomatous polyps using i-SCAN digital chromoendoscopy compared with high-definition white light.METHODS:This is a single-center comparative effectiveness pilot study.Polyps(n = 103) from 75 averagerisk adult outpatients undergoing screening or surveillance colonoscopy between December 1,2010 and April 1,2011 were evaluated by two participating endoscopists in an academic outpatient endoscopy center.Polyps were evaluated both with high-definition white light and with i-SCAN to make an in vivo prediction of adenomatous vs non-adenomatous pathology.We determined diagnostic characteristics of i-SCAN and highdefinition white light,including sensitivity,specificity,and accuracy,with regards to identifying adenomatous vs non-adenomatous polyps.Histopathologic diagnosis was the gold standard comparison.RESULTS:One hundred and three small polyps,detected from forty-three patients,were included in the analysis.The average size of the polyps evaluated in the analysis was 3.7 mm(SD 1.3 mm,range 2 mm to 8 mm).Formal histopathology revealed that 54/103(52.4%) were adenomas,26/103(25.2%) were hyperplastic,and 23/103(22.3%) were other diagnoses include 'lymphoid aggregates','non-specific colitis,' and 'no pathologic diagnosis.' Overall,the combined accuracy of endoscopists for predicting adenomas was identical between i-SCAN(71.8%,95%CI:62.1%-80.3%) and high-definition white light(71.8%,95%CI:62.1%-80.3%).However,the accuracy of each endoscopist differed substantially,where endoscopist A demonstrated 63.0% overall accuracy(95%CI:50.9%-74.0%) as compared with endoscopist B demonstrating 93.3% overall accuracy(95%CI:77.9%-99.2%),irrespective of imaging modality.Neither endoscopist demonstrated a significant learning effect with i-SCAN during the study.Though endoscopist A increased accuracy using i-SCAN from 59%(95%CI:42.1%-74.4%) in the first half to 67.6%(95%CI:49.5%-82.6%) in the second half,and endoscopist B decreased accuracy using i-SCAN from 100%(95%CI:80.5%-100.0%) in the first half to 84.6%(95%CI:54.6%-98.1%) in the second half,neither of these differences were statistically significant.CONCLUSION:i-SCAN and high-definition white light had similar efficacy predicting polyp histology.Endoscopist training likely plays a critical role in diagnostic test characteristics and deserves further study. | Johanna L Chan Li Lin Michael Feiler Andrew I Wolf Diana M Cardona Ziad F Gellad | 2012 | World Journal of Gastroenterology2012,18,41: | 3 |
| 10 | 心脏病及非心脏病患者降低舒张压的效果:收缩压干预试验结果分析显示文摘收缩压和舒张压低于何种阈值时心血管事件增多仍然不明确。应用收缩压干预试验(systolic blood pressure intervention trial,SPRINT)的数据,研究者评估了1519例心血管病患者和7574位非心血管病者的收缩压和舒张压与心血管事件之间的关系。 | 刘青 叶鹏 Khan NA Rabkin SW Zhao Y McAlister FA Park JE Guan M Chan S Humphries KH | 2018 | 中华高血压杂志2018,26,6: | 3 |
| 11 | Common variation in the LMNA gene (encoding lamin A/C) and type 2 diabetes - Association analyses in 9,518 subjects显示文摘 | Owen, KR Groves, CJ Hanson, RL Knowler, WC Shuldiner, AR Elbein, SC Mitchell, BD Froguel,P Ng, MCY Chan, JC Jia, WP Deloukas, P Hitman, GA Walker, M Frayling, TM Hattersley, AT Zeggini, E McCarthy, MI | 2007 | 中国生物学文摘2007,21,11: | 2 |
| 12 | Effect of fiber pretreatment condition on the interfacial strength and mechanical properties of wood fiber/PP composites显示文摘 | Wu J S Yu D M Chan C M | 2000 | J Appl Polym Sci2000,76,7: | 2 |
| 13 | Soluble E-cadherin is a valid prognostic marker in gastric carcinoma显示文摘 | Chan A O Lam S K Chu K M | 2001 | Gut2001,48,6: | 2 |
| 14 | TSC1-mTOR-PLK轴以阶段特异性方式调节从施旺细胞增殖到髓鞘形成的内稳态开关显示文摘恰如其分的外周髓鞘形成取决于雪旺细胞增殖与分化进程间的平衡。丝氨酸/苏氨酸激酶(mTOR)整合多种环境因素,是细胞生长、代谢、发挥作用的中枢调节者。本文报道了一种mTOR的负性调节剂——结节性硬化复合体(TSC1),通过控制细胞增殖和髓鞘稳态,建立了雪旺细胞谱系进展和髓鞘形成的阶段依赖性程序。小鼠雪旺细胞祖细胞中TSC1的解离导致mTOR信号通路激活,继而导致雪旺细胞过量增殖,分化受阻,髓鞘形成减少。转录组分析显示,TSC1突变体中的mTOR活化使得polo样激酶(PLK)依赖性通路和细胞周期调节剂上调。弱化mTOR或者对PLK进行药理抑制部分挽救了因TSC1缺失导致的外周神经发育过程中的髓鞘形成减少。相较之下,成年小鼠成熟雪旺细胞中TSC1缺失可导致髓鞘的过度增殖和过度生长。本文的发现提示了TSC1-mTOR-PLK信号轴在控制雪旺细胞的发育过程中,从增殖到分化和髓鞘内稳态中起到的阶段特异性功能。 | Jiang M Rao R Wang J Wang J1 Xu L Wu LM Chan JR Wang H Lu QR 聂昊(编译) | 2018 | 神经损伤与功能重建2018,13,5: | 2 |
| 15 | The Convergence Properties of a Clipped Hopfield Network and its Application in the Design of Keystrem Generator显示文摘 | CHI-KWONG CHAN CHENG L M | 2001 | IEEE Transactions on Neural Networks2001,12,2: | 2 |
| 16 | 慢性阻塞性肺疾病急性加重患者感染性致病因素分析显示文摘背景和目的:反复急性发作是慢性阻塞性肺疾病(COPD)的临床特点,同时也是患者住院的主要原因,呼吸道感染常常是急性发作的诱因。适当的经验性应用抗生素对于降低此类患者的住院率和病死率非常有意义。不同居住地的COPD患者引起急性发作的病原谱是不同的,因而地区性资料对于指导临床治疗很重要。本研究的目的是阐明我国香港地区COPD急性发作的病原学及其治疗。方法:研究人员分析了我国香港2004年5月至2005年4月因COPD急性发作而住院的患者, | Ko FW Ip M Chan PK 李翠联 曹彬 | 2007 | 中华结核和呼吸杂志2007,30,5: | 2 |
| 17 | Circulating nitric oxide is suppressed in obstructive sleep apnea and is reversed by nasal continuous positive airway pressure显示文摘 | Ip M S Lam B Chan L Y | 2000 | Am J Respir Crit Care Med2000,162,6: | 2 |
| 18 | ESD reliability and protection schemes in SOI CMOS output buffers显示文摘 | Chan M S Yuen S S Ma Z J | 1995 | IEEE Trans Elec Dev1995,42,10: | 2 |
| 19 | Cancer Genome Scanning in Plasma: Detection of Tumor-Associated Copy Number Aberrations, Single-Nucleotide Variants, and Tumoral Heterogeneity by Massively Parallel Sequencing显示文摘 | Chan K C Allen Jiang Peiyong Zheng Yama W L Liao Gary J W Sun Hao Wong John Siu Shing Shun N Chan Wing C Chan Stephen L Chan Anthony T C Lai Paul B S Chiu Rossa W K Lo Y M D | 2013 | Clinical Chemistry2013,,1: | 2 |
| 20 | Response of nanocomposite pyroelectric detectors 显示文摘 | CHEN Y CHAN W L H HUI N M | 1998 | Sensors and Actuators A1998,69,1: | 2 |