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145篇 您的检索式:作者名="CHEN Alan"
    题名 作者 年代 出处 被引量
1A community-derived classification for extant lycophytes and ferns显示文摘发展史长通知了蕨类植物分类。当我们推断进化的树的能力改善了,针对认出生来的组的分类变得逐渐地预兆、稳定。这里,我们为 lycophytes 和蕨纲植物提供一个现代、全面分类,在下面,利用一条基于社区的途径类水平。我们 monophyly 用作主要标准让 taxa,而且目的识别保存两个广泛地被接受的存在 taxa 和界限并且与我们蕨类植物发展史的理解一致。总共,这个分类对待一在 337 个类, 51 个家庭, 14 目,和二个班估计了 11  916 种类。这个分类没在 lycophyte 和蕨纲植物上作为最后的词被打算分类,而是当前的假设的概括陈述,源于最好的可得到的数据并且在问题由熟悉植物的那些大多数塑造了。我们希望它将在蕨类植物上为最近的文学的那些想要的参考用作一个资源发展史和分类,为指导未来调查的一个框架,和推进讲话的刺激。Eric Schuettpelz Harald Schneider Alan R. Smith Peter Hovenkamp Jefferson Prado Germinal Rouhan Alexandre Salino Michael Sundue Thafs Elias Almeida Barbara Parris Emily B. Sessa Ashley R. Field Andre Luis de Gasper Carl J. Rothfels Michael D. Windham Marcus Lehnert Benjamin Dauphin Atsushi Ebihara Samuli Lehtonen Pedro Bond Schwartsburd Jordan Metzgar Li-Bing Zhang Li-Yaung Kuo Patrick J. Brownsey Masahiro Kato Marcelo Daniel Arana Francine C. Assis Michael S. Barker David S. Barrington Ho-Ming Chang Yi-Han Chang Yi-Shan Chao Cheng-Wei Chen De-Kui Chen Wen-Liang Chiou Vinicius Antonio de Oliveira Dittrich Yi-Fan Duan Jean-Yves Dubuisson Donald R. Farrar Susan Fawcett Jose Maria Gabriel y Galan Luiz Armando de Araujo Goes-Neto Jason R. Grant Amanda L. Grusz Christopher Haufler Warren Hauk Hai He Sabine Hennequin Regina Yoshie Hirai Layne Huiet Michael Kessler Petra Korall Paulo H. Labiak Anders Larsson Blanca Leen Chun-Xiang Li Fay-Wei Li Melanie Link-Perez Hong-Mei Liu Ngan Thi Lu Esteban I. Meza-Torres Xin-Yuan Miao Robbin Moran Claudine Massi Mynssens Nathalie Nagalingum Benjamin Ollgaard Alison M. Paul Jovani B. de S. Pereira Leon R. Perrie Monica Ponce Tom A. Ranker Christian Schulz Wataru Shinohara Alexander Shmakov Erin M. Sigel Filipe Soares de Souza Lana da Silva Sylvestre Weston Testo Luz Amparo Triana-Moreno Chie Tsutsumi Hanna Tuomisto IvAn A. Valdespino Alejandra Vasco Raquel Stauffer Viveros Alan Weakley Ran Wei Stina Weststrand Paul G. Wolf George Yatskievych Xiao-Gang Xu Yue-Hong Yan Liang Zhang Xian-Chun Zhang Xin-Mao Zhou 2016Journal of Systematics and Evolution2016,54,6:44
2Peripheral T-lymphocyte subpopulations in different clinical stages of chronic HBV infection correlate with HBV load显示文摘AIM: To characterize the peripheral T-cell subpopulation profiles and their correlation with hepatitis B virus (HBV) replication in different clinical stages of chronic HBV infection.METHODS: A total of 422 patients with chronic HBV infection were enrolled in this study. The patients were divided into three stages: immune-tolerant stage, immune active stage, and immune-inactive carrier stage. Composition of peripheral T-cell subpopulations was determined by flow cytometry. HBV markers were detected by enzyme-linked immunosorbent assay. SerumHBV DNA load was assessed by quantitative real-time polymerase chain reaction.RESULTS: CD8+ T-cells were significantly higher in patients at the immune-tolerant stage than in patients at the immune-active and -inactive carrier stages (36.87 ± 7.58 vs 34.37 ± 9.07, 36.87 ± 7.58 vs 28.09 ± 5.64, P < 0.001). The peripheral blood in patients at the immune-tolerant and immune active stages contained more CD8+ T-cells than CD4+ T-cells (36.87 ± 7.58 vs 30.23 ± 6.35, 34.37 ± 9.07 vs 30.92 ± 7.40, P < 0.01), whereas the peripheral blood in patients at the immune-inactive carrier stage and in normal controls contained less CD8+ T-cells than CD4+ T-cells (28.09 ± 5.64 vs 36.85 ± 6.06, 24.02 ± 4.35 vs 38.94 ± 3.39, P < 0.01). ANOVA linear trend test showed that CD8+ T-cells were signif icantly increased in patients with a high viral load (39.41 ± 7.36, 33.83 ± 7.50, 31.81 ± 5.95 and 26.89 ± 5.71, P < 0.001), while CD4+ T-cells were signif icantly increased in patients with a low HBV DNA load (37.45 ± 6.14, 33.33 ± 5.61, 31.58 ± 6.99 and 27.56 ± 5.49, P < 0.001). Multiple regression analysis displayed that log copies of HBV DNA still maintained its highly signif icant coefficients for T-cell subpopulations, and was the strongest predictors for variations in CD3+, CD4+ and CD8+ cells and CD4+/CD8+ ratio after adjustment for age at HBV-infection, maternal HBV-infection status, presence of hepatitis B e antigen and HBV mutation.CONCLUSION: Differences in peripheral T-cell subpopulation profi les can be found in different clinical stages of chronic HBV infection. T-cell impairment is signifi cantly associated with HBV load.Jing You Lin Zhuang Yi-Feng Zhang Hong-Ying Chen Hutcha Sriplung Alan Geater Virasakdi Chongsuvivatwong Teerha Piratvisuth Edward McNeil Lan Yu Bao-Zhang Tang .lun-Hua Huang 2009World Journal of Gastroenterology2009,15,27:39
3Effect of viral load on T-lymphocyte failure in patients with chronic hepatitis B显示文摘AIM: To investigate peripheral T-lymphocyte sub-population profile and its correlation with hepatitis B virus (HBV) replication in patients with chronic hepatitis B (CHB).METHODS: Distribution of T-lymphocyte subpopulations in peripheral blood was measured by flow cytometry in 206 CHB patients. HBV markers were detected with ELISA. Serum HBV DNA load was assessed with quantitative real-time polymerase chain reaction (PCR). The relationship between HBV replication and variation in peripheral T-cell subsets was analyzed.RESULTS: CHB patients had significantly decreased CD3+ and CD4+ cells and CD4+/CD8+ ratio, and increased CD8+ cells compared with uninfected controls (55.44 ± 12.39 vs 71.07 ± 4.76, 30.92 ± 7.48 vs 38.94 ± 3.39, 1.01 ± 0.49 vs 1.67 ± 0.33, and 34.39 ± 9.22 vs 24.02 ± 4.35; P < 0.001, respectively). Univariate analysis showed a similar pattern of these parameters was significantly associated with high viral load, presence of serum hepatitis B e antigen (HBeAg) expression, liver disease severity, history of maternal HBV infection, and young age at HBV infection, all with P < 0.01. There was a significant linear relationship between viral load and these parameters of T-lymphocyte subpopulations (linear trend test P < 0.001). There was a negative correlation between the levels of CD3+ and CD4+ cells and CD4+/CD8+ ratio and serum level of viral load in CHB patients (r = -0.68, -0.65 and -0.75, all P < 0.0001), and a positive correlation between CD8+ cells and viral load (r = 0.70, P < 0.0001). There was a significant decreasing trend in CD3+ and CD4+ cells and CD4+/CD8+ ratio with increasing severity of hepatocyte damage and decreasing age at HBV infection (linear trend test P < 0.01). In multiple regression (after adjustment for age at HBV infection, maternal HBV infection status and hepatocyte damage severity) log copies of HBV DNA maintained a highly significant predictive coefficient on T-lymphocyte subpopulations, and was the strongest predictor of variation in CD3+, CD4+, CD8+ cells and CD4+/CD8+ ratio. However, the effect of HBeAg was not significant.CONCLUSION: T-lymphocyte failure was signifi-cantly associated with viral replication level. The substantial linear dose-response relationship and strong independent predictive effect of viral load on T-lymphocyte subpopulations suggests the possibility of a causal relationship between them, and indicates the importance of viral load in the pathogenesis of T cell hyporesponsiveness in these patients.Jing You Hutcha Sriplung Alan Geater Virasakdi Chongsuvivatwong Lin Zhuang Hong-Ying Chen Lan Yu Bao-Zhang Tang Jun-Hua Huang 2008World Journal of Gastroenterology2008,14,7:30
4Visible light-induced N-doped TiO_2 nanoparticles for the degradation of microcystin-LR显示文摘N-doped nano-crystalline TiO2 powders have been synthesized by the sol-gel method.The shape and crystal structure of the resulting N-doped TiO2 were investigated by X-ray Photoelectron Spectroscopy (XPS),X-ray spectroscopy (XRD),Transmission Electron Microscopy (TEM) and UV-vis reflection spectrum.The results showed that doping TiO2 with nitrogen can lower its band gap and apparently shift its optical response to the visible region.Under the visible light (λ> 420 nm) irradiation,the MC-LR was degraded by the synthesized N-TiO2 nano-material.The variation of MC-LR amount and its intermediates were detected by high performance liquid chromatography (HPLC) and LC-MS,respectively.The mineralization of MC-LR was determined by total organic carbon (TOC) analysis.Simultaneously,transient oxidative species generated during photocatalysis were tracked by electron spin resonance (ESR) and Peroxidase method.All these results indicated that visible-light excited N-TiO2 can activate molecular oxygen and thereby achieve degradation of MC-LR completely within 14 h.The removal of 59% of TOC was achieved after 20 h irradiation.The major oxidative species in the system were hydroxyl radical (·OH) and H2O2.13 Kinds of intermediates were primarily identified in the process.Based on these results,a reasonable conclusion was drawn for the degradation of MC-LR wherein its four positions are easy to be attacked by the photo-generated OH radical followed by the hydrolyzation of peptides.YANG Jing,CHEN DengXia,DENG AnPing,FANG YanFen,LUO GuangFu,LI DeJiang,LI RuiPing & HUANG YingPing Alan G.MacDiarmid Research Institute of Renewable Energy,China Three Gorges University,Yichang 443000,China 2010Science China Chemistry2010,53,8:12
5Hepatitis B virus DNA is more powerful than HBeAg in predicting peripheral T-lymphocyte subpopulations in chronic HBV-infected individuals with normal liver function tests显示文摘AIM:To investigate the peripheral T-lymphocyte subpopulation profile,and its correlations with hepatitis B virus(HBV) replication level in chronic HBV-infected(CHI) individuals with normal liver function tests(LFTs) . METHODS:Frequencies of T-lymphocyte subpopu-lations in peripheral blood were measured by flow cytometry in 216 CHI individuals. HBV markers were detected with ELISA. Serum HBV DNA load was assessed with quantitative real-time PCR. Information of age at HBV infection,and maternal HBV infection status was collected. ANOVA linear trend test and linear regression were used in statistical analysis. RESULTS:CHI individuals had significantly decreased relative frequencies of CD3+,CD4+ subpopulationsand CD4+/CD8+ ratio,and increased CD8+ subset percentage compared with uninfected individuals(all P < 0.001) . There was a significant linear relationship between the load of HBV DNA and the parameters of T-lymphocyte subpopulations(ANOVA linear trend test P < 0.01) . The parameters were also significantly worse among individuals whose mothers were known to be HBV carriers,and those having gained infection before the age of 8 years. In multiple regressions,after adjustment for age at HBV infection and status of maternal HBV infection,log copies of HBV DNA maintained its highly significant predictive coefficient on T-lymphocyte subpopulations,whereas the effect of HBeAg was not significant. CONCLUSION:HBV DNA correlates with modification in the relative T-lymphocyte subpopulation frequencies. High viral load is more powerful than HBeAg in predicting the impaired balance of T-cell subsets.Jing You Hutcha Sriplung Alan Geater Virasakdi Chongsuvivatwong Lin Zhuang Hong-Ying Chen Jun-Hua Huang Bao-Zhang Tang 2008World Journal of Gastroenterology2008,14,23:11
6Microstructure and mechanical properties of a high ductility Mg–Zn–Mn–Ce magnesium alloy显示文摘A high-ductility ZME200(Mg–2.3Zn–0.4Mn–0.2Ce^(1))alloy was newly developed for vehicle closure and structure applications,based on an earlier ZE20(Mg–2.0Zn–0.2Ce)alloy for extrusion applications.Previous study indicates that the hot deformation behavior of as-cast ZME200 alloy varies with processing parameters,namely temperature and strain rate.In this follow-up study,a conventional rolling process was optimized to obtain magnesium sheets with a very fine grain structure and high ductility.The microstructure,mechanical properties,and corrosion resistances of ZME200 alloy were investigated,and compared with those of commercial AZ31 magnesium alloy.It was demonstrated that the ZME200 alloy sheet exhibits extraordinarily higher ductility(36%in tensile elongation),much superior stretch formability(an Erichsen value of 9.5),lower anisotropy,comparable strength and corrosion resistance to AZ31 alloy.The unique RD–TD double split texture with remarkably reduced intensity and grain refinement gives rise to the significantly improved ductility and formability at room-temperature.Lei Gao Hong Yan Jun Luo Alan A.Luo Rongshi Chen 2013Journal of Magnesium and Alloys2013,1,4:10
7A NEW QUANTITATIVE WAY FOR DETERMINING LEAF AREA INDEXAND NET PRIMARY PRODUCTIVITY IN REGIONAL SCALE显示文摘An inversion of bidirectional reflection distribution fiJnedon (BRDF) wastested using NK Model and NOAA AVHRR datu. The test involVed sensitiveanalysis, optimum inversion selecting, ground simulated expenment, calibrahngmeasuremed with satellite and computer image processmg. Results of comparisonwith NDVI indicatal that inversion of BRDF will have brigh developing prospect inthe next decade.Zhang Renhua(Institute of Geography, CAS, Bejing 100101, P.R. China)Andres Kuusk(Estorua Observatory, Tatu, Estorua)Chen Gang(Ground Station of Satellite Remote Sensing, CAS, Behing 100086, P.R. China)Alan Strahler Li Xiaonen(Remote Sensing Cater, Boston 1996Journal of Geographical Sciences1996,6,4:7
8A deep learning-integrated micro-CT image analysis pipeline for quantifying rice lodging resistance-related traits显示文摘Lodging is a common problemin rice,reducing its yield andmechanical harvesting efficiency.Rice architecture is a key aspect of its domestication and a major factor that limits its high productivity.The ideal rice culm structure,includingmajor_axis_culm,minor axis_culm,andwall thickness_culm,is critical for improving lodging resistance.However,the traditionalmethod ofmeasuring rice culms is destructive,time consuming,and labor intensive.In this study,we used a high-throughput micro-CT-RGB imaging system and deep learning(SegNet)todevelopa high-throughputmicro-CTimageanalysis pipelinethatcanextract 24 riceculmmorphological traits and lodging resistance-related traits.When manual and automatic measurements were compared at themature stage,the mean absolute percentage errors for major_axis_culm,minor_axis_culm,andwall_thickness_culmin 104 indica rice accessionswere 6.03%,5.60%,and 9.85%,respectively,and the R^(2) valueswere 0.799,0.818,and 0.623.We also builtmodels of bending stress using culmtraits at the mature and tillering stages,and the R^(2) values were 0.722 and 0.544,respectively.The modeling results indicated that this method can quantify lodging resistance nondestructively,even at an early growth stage.In addition,we also evaluated the relationships of bending stress toshoot dryweight,culm density,and drought-related traits and found that plants with greater resistance to bending stress had slightly higher biomass,culm density,and culm area but poorer drought resistance.In conclusion,we developed a deep learning-integrated micro-CT image analysis pipeline to accurately quantify the phenotypic traits of rice culms in4.6 min per plant;this pipeline will assist in future high-throughput screening of large rice populations for lodging resistance.Di Wu Dan Wu Hui Feng Lingfeng Duan Guoxing Dai Xiao Liu Kang Wang Peng Yang Guoxing Chen Alan P.Gay John H.Doonan Zhiyou Niu Lizhong Xiong Wanneng Yang 2021Plant Communications2021,2,2:7
9ROR2 gene is associated with risk of non-syndromic cleft palate in an Asian population显示文摘背景受体酷氨酸象kinase一样孤儿受体 2 ( ROR2 )基因最近被显示了在动物模型在腭的开发起重要作用并且居住在连接到的 chromosomal 区域非, syndromic 劈开嘴唇与或没有在学习是调查可能的协会在之间的这的 humans.The 目的劈开腭 ROR2 基因和 non-syndromic 我们测试了的这里的口头的 clefts.Methods 在在 297 non-syndromic 的 ROR2 基因的 38 合格单个核苷酸的多型性( SNP )Wang Hong Hetmanski, Jacqueline B. Ruczinski, Ingo Liang, Kung Yee Fallin, M. Daniele Redett, Richard J. Raymond, Gerald V. Chou, Yah-Huei Wu Chen, Philip Kuo-Ting Yeow, Vincent Chong, Samuel S. Cheah, Felicia S. H. Jabs, Ethylin Wang Scott, Alan F. Beaty, Terri H. 2012Chinese Medical Journal2012,,3:5
10Tissue-based metabolite profiling and qualitative comparison of two species of Achyranthes roots by use of UHPLC-QTOF MS and laser micro-dissection显示文摘Achyranthes bidentata and Achyranthes aspera are saponin and steroid rich medicinal plants, used extensively for therapeutic treatments in Traditional Chinese Medicine(TCM) and Ayurveda. A. bidentata is reported to be one of the rare and extensively exploited medicinal plant species that face the issue of being endangered.Finding qualitative substitute with identical phyto-constituents contributing to similar composition and pharmacological benefits will help in reducing the burden of exploitation of the natural habitats of such plants.In the present study, a comparative metabolite analysis of the whole drug and specific tissues isolated by laser micro-dissection(LMD) was carried out for both the selected species, by use of ultra-high performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UHPLC-QTOF MS). The results of the study indicate that the cortex and the medullary ray tissues are rich in their content of steroidal and saponin constituents such as(25 S)-inokosterone-20,22-acetonide, ginsenoside Ro, bidentatoside II and achyranthoside B.Metabolite profiling of the whole tissues of both the species indicates presence of identical constituents. Thus,it is inferred that A. bidentata and A. aspera can be used as qualitative substitutes for each other.Yogini Jaiswal Zhitao Liang Alan Ho Hubiao Chen Leonard Williams Zhongzhen Zhao 2018Journal of Pharmaceutical Analysis2018,8,1:5
11Predicting and controlling interfacial microstructure of magnesium/aluminum bimetallic structures for improved interfacial bonding显示文摘In this study,an overcasting process followed by a low-temperature(200°C)annealing schedule has been developed to bond magnesium to aluminum alloys.ProCAST software was used to optimize the process parameters during the overcasting process which lead to Mg/Al bimetallic structures to be successfully produced without formation of Mg-Al intermetallic phases.Detailed microstructure evolution during annealing,including the formation and growth of Al-Mg interdiffusion layer and intermetallic phases(Al12Mg17 and Al3Mg2),was experimentally observed for the first time with direct evidence,and predicted using Calculation of Phase Diagrams(CALPHAD)modeling.Maximum interfacial strength was achieved when the interdiffusion layer formed at the Mg/Al interface reached a maximum thickness the without formation of brittle intermetallic compounds.The precise diffusion modeling of the Mg/Al interface provides an efficient way to optimize and control the interfacial microstructure of Mg/Al bimetallic structures for improved interfacial bonding.Ziang Zhu Renhai Shi Andrew D.Klarner Alan A.Luo Yiqing Chen 2020Journal of Magnesium and Alloys2020,8,3:4
12Phylogenomics of non-model ciliates based on transcriptomic analyses显示文摘Ciliates 是最旧的生活真核细胞的单细胞的有机体之一,在水里广泛地分布式在全世界。作为典型海洋的 oligotrich 有睫, Strombidium sulcatum 在海洋的食物网和精力流动起一个重要作用。这里,我们报导第一从 Strombidium sulcatum 的深定序和 RNA-Seq 数据的分析。我们在 de novo 汇编和搬迁 rRNA 以后与 1,451 bp 的 N50 产生了 42,640 unigenes, mitochondrial 和细菌沾染物。我们采用了 SPOCS 从 S 检测 orthologs。sulcatum 和 17 另外的 ciliates,然后用 127 单个拷贝 orthologs 执行了 phylogenomic 重建。在 phylogenomic 分析,并置树在班水平上与词语索引树有类似的拓扑的结构。和种系发生的网络分析,它关于 Protocruzia, Mesodinium 和 Myrionecta 的放置引起了更多的疑问。当 epiplasmic 蛋白质被知道与词法特征有关时,我们发现了在 epiplasmic 蛋白质和词法特征的基因表示之间的潜在的关系。这个工作象在目标基因和词法特征的表示水平之间的关联分析一样为 phylogenomic 分析支持高产量途径的使用。Xiao Chen Xiaolu Zhao Xiaohui Liu Alan Warren Fangqing Zhao Miao Miao 2015Protein & Cell2015,6,5:4
13Automated generation and ensemble-learned matching of X-ray absorption spectra显示文摘X-ray absorption spectroscopy(XAS)is a widely used materials characterization technique to determine oxidation states,coordination environment,and other local atomic structure information.Analysis of XAS relies on comparison of measured spectra to reliable reference spectra.However,existing databases of XAS spectra are highly limited both in terms of the number of reference spectra available as well as the breadth of chemistry coverage.In this work,we report the development of XASdb,a large database of computed reference XAS,and an Ensemble-Learned Spectra IdEntification(ELSIE)algorithm for the matching of spectra.XASdb currently hosts more than 800,000 K-edge X-ray absorption near-edge spectra(XANES)for over 40,000 materials from the open-science Materials Project database.We discuss a high-throughput automation framework for FEFF calculations,built on robust,rigorously benchmarked parameters.FEFF is a computer program uses a real-space Green’s function approach to calculate X-ray absorption spectra.We will demonstrate that the ELSIE algorithm,which combines 33 weak“learners”comprising a set of preprocessing steps and a similarity metric,can achieve up to 84.2% accuracy in identifying the correct oxidation state and coordination environment of a test set of 19 K-edge XANES spectra encompassing a diverse range of chemistries and crystal structures.The XASdb with the ELSIE algorithm has been integrated into a web application in the Materials Project,providing an important new public resource for the analysis of XAS to all materials researchers.Finally,the ELSIE algorithm itself has been made available as part of veidt,an open source machine-learning library for materials science.Chen Zheng Kiran Mathew Chi Chen Yiming Chen Hanmei Tang Alan Dozier Joshua J.Kas Fernando D.Vila John J.Rehr Louis F.J.Piper Kristin A.Persson Shyue Ping Ong 2018npj Computational Materials2018,,1:3
14Structural insights into Ca^2+-activated long-range allosteric channel gating of RyR1显示文摘Ryanodine 受体(RyRs ) 是有分子的质量的巨大的离子隧道的一个班超过 2.2 大 -- 道尔顿。这些隧道调停钙在许多房间发信号。因为超过 80% RyR 蛋白质被合拢进细胞质的集会,留下的残余形成 transmembrane 领域, RyR 隧道的激活和规定发生通过,这被假设了一迄今为止 uncharacterized 远程的 allosteric 机制。这里,我们报导 Ca 2+-activated 的描述由 cryo 电子的开状态的 RyR1 结构显微镜学。结构有 4.9 Å 的一个全面决定;并且 4.2 Å 的一个决定;为核心区域。与以前坚定的 apo/closed-state 结构比较,我们在 Ca 2+ 激活之上观察了隧道的远程的 allosteric gating。深入的结构的分析阐明了新奇隧道门机制和 RyR1 的新奇离子选择机制。我们的工作不仅提供结构的卓见进隧道 gating 和 RyRs 的规定的分子的机制,而且为 six-transmembrane-helix 阳离子隧道家庭为隧道门和离子选择机制使结构的基础清楚些。Risheng Wei Xue Wang Yan Zhang Saptarshi Mukherjee Lei Zhang Qiang Chen Xinrui Huang Shan Jing Congcong Liu Shuang Li Guangyu Wang Yaofang Xu Sujie Zhu Alan J Williams Fei Sun Chang-Cheng Yin 2016Cell Research2016,26,9:3
15因子Ⅶ-金黄色葡萄球菌肠毒素A融合蛋白的抗肿瘤效果显示文摘目的研究鼠因子Ⅶ(mfⅦ)与金黄色葡萄球菌肠毒素A(SEA)融合蛋白的抗肿瘤生长和转移活性。方法构建表达Ⅶ因子SEA融合蛋白的腺病毒载体,用293包装细胞系制备病毒Ad/mfⅦSEA。局部荧光检测证明其表达能力和安全性后,直接应用病毒感染的293细胞以皮下注射的方式进行试验。采用小鼠205H12肺转移模型和小鼠RM1皮下肿瘤模型检测mfⅦSEA对小鼠皮下肿瘤生长和肺转移形成的抑制情况。结果腺病毒感染的293细胞诱导的二次感染只在注射局部产生,而对心、肝、肾等重要脏器无任何影响。小鼠体内实验结果显示,mfⅦSEA治疗组肺转移数(23±8)与空载体对照组(193±38)和PBS对照组(211±42)相比,差异有统计学意义(P<0.01)。在抗小鼠前列腺肿瘤的动物实验中,mfⅦSEA对皮下肿瘤的抑制非常明显,第23天时,治疗组皮下肿瘤的体积平均为(342.6±107.1)mm3,明显小于空载体对照组(2244.3±350)mm3和SEA对照组(1208.3±210)mm3。结论mfⅦSEA融合蛋白能明显抑制小鼠皮下肿瘤的生长和肺转移的形成。李进 孙颖 Masako Chen 李锋 Alan Garen 2005中华肿瘤杂志2005,27,8:3
16Phylogenetic positions of two marine ciliates, Metanophrys similis and Pseudocohnilembus hargisi (Protozoa, Ciliophora,Scuticociliatia), inferred from complete small subunit rRNA gene sequences显示文摘The small subunit rRNA (SSrRNA) gene was sequenced for two marine scuticociliates Metanophrys similis and Pseudocohnilembus hargisi. The results show that this gene comprises 1763 and 1753 nucleotides in the two marine ciliates respectively. Metanophrys similis is phylogenetically closely related to the clade containing Mesanophrys carcini and Anophyroides haemophila, which branches basally to other species within the order Philasterida. Pseudocohnilembus hargisi groups with its congener, P. marinus, with strong bootstrap support. Paranophrys magna groups with the clade including Cohnilembus and Uronema, representing a sister clade to that containing the two Pseudocohnilembus species.SHANG Huimin SONG Weibo Alan WARREN LI Lifang CHEN Zigui 2006Progress in Natural Science:Materials International2006,16,4:2
17Ore Image Segmentation Method Based on U-Net and Watershed显示文摘Ore image segmentation is a key step in an ore grain size analysis based on image processing.The traditional segmentation methods do not deal with ore textures and shadows in ore images well Those methods often suffer from under-segmentation and over-segmentation.In this article,in order to solve the problem,an ore image segmentation method based on U-Net is proposed.We adjust the structure of U-Net to speed up the processing,and we modify the loss function to enhance the generalization of the model.After the collection of the ore image,we design the annotation standard and train the network with the annotated image.Finally,the marked watershed algorithm is used to segment the adhesion area.The experimental results show that the proposed method has the characteristics of fast speed,strong robustness and high precision.It has great practical value to the actual ore grain statistical task.Hui Li Chengwei Pan Ziyi Chen Aziguli Wulamu Alan Yang 2020Computers, Materials & Continua2020,,10:2
18单克隆抗体TNT-1的纯化、F(ab)_2片段化及其免疫活性的测定显示文摘TNT-1是-种鼠IgG_2a单抗,已用于肿瘤病人的临床试验。本文将介绍从腹水中进一步纯化TNT-1的方法及制备其F(ah′)_2片段的条件。经Protein A亲和柱层析从小鼠腹水中提取出的lgG,再通过阳离子交换树脂柱Mono S,用缓冲液A(20 mmol/L MES,pH6.3)和缓冲液B(lmol/L NaCI),在快速蛋白液相色层(FPLC)系统上进行梯度洗脱分离,可制得纯净的TNT-1抗体,其免疫活性可达80%~85%;经纯化的TNT-1,用胃蛋白酶消化,制备F(ah′)~2片段,其消化条件是:酶的用量为抗体的1/250,pH3.8,温度37℃,时间4~5 /小时。消化后的混合物,用protein A亲和结合法除去完整的IgG,其余的F(ab′)_2和Fab、Fc等片段,在Mono S柱上,按前述的条件分离。产物TNT-1或F(ah′)_2的免疫活性,用标记抗体和过量抗原结合的方法测定;分高纯化过程中的洗脱峰,用间接免疫荧光技术监测其活性。结果戾明,TNR-1的F(ab′)_2片段的制备是成功的,色层分离纯化的方法简便而有效,并已成功地应用于批量生产。刘长征 F-M Chen Alan L Epstein 1991中山医科大学学报1991,12,4:2
19Phoenixin: a novel brain-gut-skin peptide with multiple bioactivity显示文摘在这简短评论,我们相对小肽 ligand 的发现总结当前的 fndings, phoenixin (PNX ) 。用一条生物信息的途径,分别地,包含 14 和 20 氨基酸的二新奇的肽 PNX-14 和 PNX-20 包括大脑,心,肺和胃从多样的纸巾被孤立。集体 spectrometry 分析识别了相应于 PNX-14 和 PNX-20 的一座主要、次要的山峰,在针的绳索提取的老鼠或老鼠。与兔子 polyclonal 抗血清的使用, phoenixin immunoreactivity (irPNX ) 包括几 hypothalamic subnuclei 和迷走神经的背面的马达原子核在啮齿类动物大脑的分离区域被检测。另外, irPNX 包括背面的根中心,有节的中心和三叉的中心在感觉中心房间的一张人口,并且在浓密地散布到背面的角,独居的道的原子核和针的三叉的道的表面的层的房间过程被检测。irPNX 房间过程也在皮肤和 myenteric 丛被检测,建议一个大脑勇气或大脑皮连接。PNX-14 皮下地注射了到老鼠的颈的项的药理学研究表演挑起了重复的抓一回与 hindpaws 指导了到颈的背的剂量依赖者。我们的结果建议肽 PNX-14 或 PNX-20,可以用作内长的信号分子 transducing 痒感觉之一。另外,从另外的实验室的结果证明外长的 PNX 可以影响象记忆形成,消沉,复制,食物吸入和象 anxiolytic 一样行为那样的很多多样的行为。Rong-Ming LYU Alan COWAN Ying ZHANG Yi-Hung CHEN Siok L DUN Jaw-Kang CHANG Nae J DUN Jin Jun LUO 2018Acta Pharmacologica Sinica2018,39,5:2
20Innate Immune Tolerance and the Role of Kupffer Cells in Differential Responses to Interferon Therapy Among Patients with HCV Genotype 1 Infection显示文摘Daryl T.-Y. Lau Amina Negash Jie Chen Nanette Crochet Mala Sinha Yuhong Zhang Jeremie Guedj Sharon Holder Takeshi Saito Stanley M. Lemon Bruce A. Luxon Alan S. Perelson Michael Gale 2012Gastroenterology2012,,:2
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