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3935篇 您的检索式:作者名="Tan B"
    题名 作者 年代 出处 被引量
12019新型冠状病毒基因组特征和流行病学:病毒起源和受体结合的意义显示文摘研究者对来自9例新型冠状病毒肺炎住院患者的支气管肺泡灌洗液样本和培养的分离株进行了下一代测序。从这些个体中获得了严重急性呼吸综合征-冠状病毒2(severe acute respiratory syndrome-coronavirus 2,SARS-CoV-2)的完整和部分基因组序列。利用Sanger测序连接病毒重叠群以获得全长基因组,cDNA末端快速扩增确定终端区。对这些SARSCoV-2基因组和其他冠状病毒基因组进行了系统进化分析,以确定该病毒的进化史并有助于推断其可能的起源。刘青(译) 刘莉(审校) Lu R Zhao X Li J Niu P Yang B Wu H Wang W Song H Huang B Zhu N Bi Y Ma X Zhan F Wang L Hu T Zhou H Hu Z Zhou W Zhao L Chen J Meng Y Wang J Lin Y Yuan J Xie Z Ma J Liu WJ Wang D Xu W Holmes EC Gao GF Wu G Chen W Shi W Tan W 2020中华高血压杂志2020,28,3:516
2Polymorphisms of MTHFD,plasma homocysteine levels, and risk of gastric cancer in ahigh-risk Chinese population显示文摘Purpose:Accumulative evidence suggests that folate has a protective effect on gastric cancer. The methylenetetrahyd-rofolate dlehydrogenase(MTHFD) plays an important role in folate and homocysteine metabolisms, and polymorphisms of MTHFD may result in disturbance of the folate-mediated homocysteine pathway. The aim of this study is to test the hypothesis that genetic variants of MTHFD and plasma homocysteine levels are associated with risk of gastric cancer and modulated by genotypes of methylenetetrahydrofolate reductase(MTHFR). Experimental Design: We genotyped G1958A and T401C in MTHFD and C677T in MTHFR and detected total plasma homocysteine(tHcy) levels in a case-control study of 589 gastric cancer cases and 635 cancer-free controls in a high-risk Chinese population. Results:The variant genotypes of MTHFD 1958AA and 401CC were associated with a significantly increased risk of gastric canceradjusted odds ratio(OR), 2.05; 95% confidence interval(95% CI),1.34-3.13 for 1958AA; adjusted OR,1.43; 95% CI,1.14-1.80 for 401CC compared with 1958GG/GA and 401TT/TC genotypes, respectively. Both of the effects were more evident in the subjects carrying MTHFR 677CT/TT genotypes. The average tHcy level was significantly higher in gastric cancer cases than in controls(P < 0.01), and the upper quartile of tHcy (> 13.6 mu mol/L) was associated with an 82% significantly increased risk of gastric cancer, compared with the lowest quartile of tHcy(<= 8.0 pmol/L;adjusted OR,1.82; 95% CI,1.20-2.75). Conclusions:The strong associations between MTHFD variants and the plasma tHcy levels and gastric cancer risk suggest, for the first time, a possible gene-environment interaction between genetic variants of folate-metabolizing genes and high tHcy levels in gastric carcinogenesis.Wang, L. N Ke, Q Chen, W. S Wang, J. M Tan, Y. F Zhou, Y Hua, Z. L Ding, W. L Niu, J. Y Shen, J Zhang, Z. F Wang, X. R Xu, Y. H Shen, H. B Yi Xing 2007南京医科大学学报(自然科学版)2007,27,7:10
3Distribution of pericellular matrix molecules in the temporomandibular joint and their chondroprotective effects against inflammation显示文摘The objectives of this study were to(1) determine the distribution and synthesis of pericellular matrix(PCM) molecules(collagen VI, collagen IV and laminin) in rat temporomandibular joint(TMJ) and(2) investigate the effects of PCM molecules on chondrocytes against inflammation in osteoarthritis. Four zones(fibrous, proliferating, mature and hypertrophic) of condylar cartilage and three bands(anterior, intermediate and posterior) of disc were analysed by immunohistochemistry for the presence of PCM molecules in rat TMJs. Isolated chondrocytes were pre-treated with PCM molecules before being subjected to interleukin(IL)-1β treatment to stimulate inflammation. The responses of the chondrocytes were analysed using gene expression, nitric oxide release and matrix metalloproteinase(MMP)-13 production measures. Histomorphometric analyses revealed that the highest areal deposition of collagen VI(67.4%), collagen IV(45.7%) and laminin(52.4%) was in the proliferating zone of TMJ condylar cartilage. No significant difference in the distribution of PCM molecules was noted among the three bands of the TMJ disc. All three PCM molecules were expressed intracellularly by chondrocytes cultured in the monolayer. Among the PCM molecules, pre-treatment with collagen VI enhanced cellular proliferation, ameliorated IL-1β-induced MMP-3, MMP-9, MMP-13 and inducible nitric oxide synthase gene expression, and attenuated the downregulation of cartilage matrix genes, including collagen I, aggrecan and cartilage oligomeric matrix protein(COMP). Concurrently, collagen VI pretreatment inhibited nitric oxide and MMP-13 production. Our study demonstrates for the first time the distribution and role of PCM molecules, particularly collagen VI, in the protection of chondrocytes against inflammation.Wern Cui Chu Shipin Zhang Timothy J Sng Yu Jie Ong Wen-Li Tan Vivien Y Ang Casper B Foldager Wei Seong Toh 2017International Journal of Oral Science2017,9,1:5
4Wash water in waterworks:contaminants and process options for reclamation显示文摘Reclamation of clean water from filter backwash water was studied through pilot-scale experiments.The pilot plant consisted of clarification,sand-filtration,and ultrafiltration modules in sequence,with a provision to bypass the sand filter.Clean water that conformed to World Health Organization (WHO) guidelines on Potable Quality was reclaimed.Turbidity,aluminum and iron were found to be critical contaminants in process selection and design.Clarification,followed by sand filtration,was found to be the minimum requirement for recycling filter backwash.However,membrane filtration would enhance reclaimed water quality as the membrane acts as an additional barrier against Giardia and Cryptosporidium.C B Chidambara Raj Tan Ee Kwong Soh Hoo Tiong Paul Stefan Klose 2008Journal of Environmental Sciences2008,20,11:4
5Effects of selenomethionine on acute toxicities from concurrent chemoradiation for inoperable stage Ⅲ nonsmall cell lung cancer显示文摘AIM: To prospectively determine the safety and tolerability of oral L-selenomethionine(SLM) with concurrent chemoradiation(CCRT) for Stage Ⅲ non-small cell lung cancer(NSCLC) and estimate if the incidence and/or severity of adverse events could be reduced by its use.METHODS: Sixteen patients with stage Ⅲ NSCLC were accrued to this single arm, phase Ⅱ study. CCRT consisted of radiation given at 2 Gy per fraction for 30-33 fractions, 5 d per week with concurrent weekly Ⅳ paclitaxel 50 mg/m2 followed by carboplatin dosed at an area under the time-concentration curve of 2. SLM was dosed in a loading phase at 4800 μg twice daily for one week prior to CCRT followed by once daily dosing during treatment. RESULTS: No selenium-related toxicity was observed. Analysis revealed grade 3 or higher esophagitis in 3 of 16 patients(19%), pneumonitis in 0, leukopenia in 2(12.5%), and anemia in 1(6%); the latter two were significantly reduced when compared to the protocolstated expected rate of 35%(P = 0.045 for leukopenia, and P < 0.01 for anemia). Median overall survival was 14.9 mo and median failure-free survival was 9 mo(95%CI: 3.3-21.5).CONCLUSION: There may be some protective benefit of selenium in the setting of CCRT for inoperable NSCLC. The data suggests decreased rates of myelosuppression when compared to similarly-treated historical and contemporary controls. Further evaluation of selenium in this setting may be warranted.Michael Mix Nithya Ramnath Jorge Gomez Charles de Groot Saju Rajan Shiva Dibaj Wei Tan Youcef Rustum Michael B Jameson Anurag K Singh 2015World Journal of Clinical Oncology2015,6,5:4
6HETEROPHYLLIN-A AND B,TWO CYCLOPEPTIDES,FROM THE ROOTS OF PSEUDOSTELLARIA HETEROPHYLLA显示文摘Two cyclopeptides,heterophyllin A and B,have been isolated from the rootsof Pseudostellaria heterophylla.Their structures were elucidated by chemical,spectroscopic,and enzymatic methods.Ning Hua TAN Shou Xun ZHAO a Department of Phytochemistry,China Pharmaceutical University,Nanjing,210009 Jun ZHOU Hong Jie ZHANG De Zu WANG Chang Xiang CHEN Xiao Zhu LIU b Laboratory of Phytochemistry,Kunming Institute of Botany,Academia Sinica,Kunming,650204 1992Chinese Chemical Letters1992,3,8:4
7质子注入和快速退火对GaAs/AlGaAs量子阱红外探测器的影响显示文摘利用质子注入和快速退火技术改变GaAs/AlGaAs量子阱能级分布,使量子阱红外探测器的光电特性发生变化,在较大地移动了探测波长的同时,探测器的响应率、探测率以及暗电流特性也发生相应变化.在质子注入剂量为2.5×1015cm-2、快速退火条件为950℃、30s时,峰值探测波长移动2μm.李娜 陆卫 李宁 刘兴权 袁先漳 窦红飞 沈学础 FU Lan Tan H H C Jagadish M B Johnston M Gal 2000红外与毫米波学报2000,19,1:3
8Complement activation by phospholipids: the interplay of factor H and C1q显示文摘Complement proteins in blood recognize charged particles.The anionic phospholipid(aPL)cardiolipin binds both complement proteins C1q and factor H.C1q is an activator of the complement classical pathway,while factor H is an inhibitor of the alternative pathway.To examine opposing effects of C1q and factor H on complement activation by aPL,we surveyed C1q and factor H binding,and complement activation by aPL,either coated on microtitre plates or in liposomes.Both C1q and factor H bound to all aPL tested,and competed directly with each other for binding.All the aPL activated the complement classical pathway,but negligibly the alternative pathway,consistent with accepted roles of C1q and factor H.However,in this system,factor H,by competing directly with C1q for binding to aPL,acts as a direct regulator of the complement classical pathway.This regulatory mechanism is distinct from its action on the alternative pathway.Regulation of classical pathway activation by factor H was confirmed by measuring C4 activation by aPL in human sera in which the C1q:factor H molar ratio was adjusted over a wide range.Thus factor H,which is regarded as a down-regulator only of the alternative pathway,has a distinct role in downregulating activation of the classical complement pathway by aPL.A factor H homologue,β2-glycoprotein-1,also strongly inhibits C1q binding to cardiolipin.Recombinant globular domains of C1q A,B and C chains bound aPL similarly to native C1q,confirming that C1q binds aPL via its globular heads.Lee Aun Tan Bingbin Yu Francis CJ Sim Uday Kishore Robert B Sim 2010Protein & Cell2010,1,11:2
9Mammography of ductal carcinoma in situ of the breast: Review of 909 cases with radiographic–pathologic correlations显示文摘Béatrice Barreau Isabelle de Mascarel Caroline Feuga Gaétan MacGrogan Marie-Hélène Dilhuydy Véronique Picot Jean-Marie Dilhuydy Christine Tunon de Lara Emmanuel Bussières I. Schreer 2005European Journal of Radiology2005,,1:2
10Estrogen promotes tumor progression in a genetically defined mouse model of lung adenocarcinoma显示文摘Hammoud Z Tan B Badve S Bigsby RM 2008Endocr Relat Cancer2008,15,2:1
11A Novel Strategy to Fabricate γ-Fe2O3-MWCNTs Hybrids with Selectively Ferromagnetic or Superparamagnetic Properties 显示文摘Fan X B Tan F Y Zhang G L 2007Mater Sci & Eng A2007,45,:1
12Hidden semi-Markov model for anomaly detection显示文摘Tan X B Xi H S 2008Applied Mathematics and Computation2008,205,2:1
13A randomized, controlled study comparing minilaparotomy versus isobaric gasless laparoscopic assisted minilaparotomy myomectomy for removal of large uterine myomas: short-term outcomes 显示文摘Tan J Sun Y Zhong B 2009Obstet Gynecol Reprod Bio12009,145,1:1
14Fabrication and Charaterization of Ti -TiB2 Functionally Graded Material System显示文摘J ma G E B tan Zeming 2002Metallurgical and materals transactions2002,33,:1
15Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid显示文摘Tan Y F Li J X Yu S B et a1 2000Theor Appl Genet2000,101,56:1
16Efficient expression of the human papillomavirus type 16 L1 protein in epithelial cells by using Rev and the Rev-responsive element of human immunodeficiency virus or the cis-acting transactivation element of simian retrovirus type 1显示文摘Tan W Felber B K Zolotukhin A S 1995J Virol1995,69,:1
17Melatonin as a free radical scavenge:Implications for aging and age-related diseases显示文摘Rriter R J Tan D X Poeggeler B 1994Ann NY Acad Sci1994,719,:1
18A gene expression based method to diagnose clinically distinct subgroups of dif fuse large B cell lymphoma显示文摘Wright G Tan B Rosenwald A el al 2003Proc Natl Acad Sci USA2003,100,17:1
19Nitrogen, sulfur, and chlorine trans- formations during the pyrolysis of straw显示文摘Wang X B Si J P Tan H Z 2010Energy & Fuels2010,24,9:1
20Improving the nutritive value of full-fat rice bran for broiler chickens using a lipase-basedenzyme preparation显示文摘Tan S H Thomas D V Cumden B Je t al 2000Asian Australasian Journal of Animal Sciences2000,13,3:1
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