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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 | 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 |
| 3 | 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 |
| 4 | 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 |
| 5 | 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 |
| 6 | 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 |
| 7 | 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 |
| 8 | Hiding data in images by simple LSB substitution显示文摘 | Chan Chi-Kwong Cheng L M | 2004 | Pattern Recognition2004，，37： | 1 |
| 9 | A probabilistic reasoning-based decision support system for selecting remediation technologies for petroleum-contaminated sites 显示文摘 | HE L CHAN C W HUANG G H ZENG G M | 2006 | Expert Systems with Applications2006，30，4： | 1 |
| 10 | Sliding mode controller for linear systems with mismatched time-varying uncertainties 显示文摘 | TAO C W LEE T T | 2000 | Journal of Franklin Institute2000，337，： | 1 |
| 11 | Damage-based formability analysis for TWBs显示文摘 | Cheng C H Jie M | 2005 | International Journal of Damage Mechanics2005，14，1： | 1 |
| 12 | Tropical cyclone movement and sur- rounding flow relationship 显示文摘 | Chan J C L G ray W M | 1982 | Mon Wea Rev1982，110，9： | 1 |
| 13 | Tropical cyclone movement and surrounding flow relationship显示文摘 | CHAN J C L GRAY W M | 1982 | Mon Wea Rev1982，110，9： | 1 |
| 14 | Cryptanalysis of a remote user authentication scheme using smart cards显示文摘 | CHAN C K CHENG L M | 2000 | IEEE Transactions on Consumer Electronics2000，46，4： | 1 |
| 15 | Reversal of obesity bytargeted ablation of adipose tissue显示文摘 | Kolonin M G Saha P K Chan L | 2004 | Nat Med2004，10，6： | 1 |
| 16 | Replication ofavian and seasonal influenza viruses in human bronchus andlung显示文摘 | Chan R W Y Yuen K M Yu W C L | 2011 | Influenza Other Resp Viruses2011，5，： | 1 |
| 17 | Renal function with enteric-coated mycophenolate sodium in combination with reduced and standard tacrolimus levels: results of a 6-month comparative study in de novo renal transplant recipients显示文摘 | Hart M Chan L Andres A | 2008 | Am J Transplant2008，8，58： | 1 |
| 18 | Cloning of a cDNA encoding a pu- tative molt-inhibiting hormone from the eyestalk of the sand shrimp Metapenaeus ensis 显示文摘 | Gu P L Chan S M | 1998 | Mol Marine Bio- tech1998，7，3： | 1 |
| 19 | Preferred risk allocation in target cost contracts in con- struction显示文摘 | Joseph H L Chan Daniel W M Chan Patrick T I Lam | 2011 | Facilities2011，29，1314： | 1 |
| 20 | Hydrogen sulfide-based therapeutics and gastrointestinal diseases : translating physiology to treatments显示文摘 | Chan M V Wallace J L | 2013 | Am J Physial Gastrointest Liver Physiol2013，305，7： | 1 |
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