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537篇 您的检索式:作者名="LAN Yan"
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1Identification of a novel coronavirus causing severe pneumonia in human:a descriptive study显示文摘Background:Human infections with zoonotic coronaviruses(CoVs),including severe acute respiratory syndrome(SARS)-CoV and Middle East respiratory syndrome(MERS)-CoV,have raised great public health concern globally.Here,we report a novel batorigin CoV causing severe and fatal pneumonia in humans.Methods:We collected clinical data and bronchoalveolar lavage(BAL)specimens from five patients with severe pneumonia from Wuhan Jinyintan Hospital,Hubei province,China.Nucleic acids of the BAL were extracted and subjected to next-generation sequencing.Virus isolation was carried out,and maximum-likelihood phylogenetic trees were constructed.Results:Five patients hospitalized from December 18 to December 29,2019 presented with fever,cough,and dyspnea accompanied by complications of acute respiratory distress syndrome.Chest radiography revealed diffuse opacities and consolidation.One of these patients died.Sequence results revealed the presence of a previously unknownβ-CoV strain in all five patients,with 99.8%to 99.9%nucleotide identities among the isolates.These isolates showed 79.0%nucleotide identity with the sequence of SARS-CoV(GenBank NC_004718)and 51.8%identity with the sequence of MERS-CoV(GenBank NC_019843).The virus is phylogenetically closest to a bat SARS-like CoV(SL-ZC45,GenBank MG772933)with 87.6%to 87.7%nucleotide identity,but is in a separate clade.Moreover,these viruses have a single intact open reading frame gene 8,as a further indicator of bat-origin CoVs.However,the amino acid sequence of the tentative receptor-binding domain resembles that of SARS-CoV,indicating that these viruses might use the same receptor.Conclusion:A novel bat-borne CoV was identified that is associated with severe and fatal respiratory disease in humans.Li-Li Ren Ye-Ming Wang Zhi-Qiang Wu Zi-Chun Xiang Li Guo Teng Xu Yong-Zhong Jiang Yan Xiong Yong-Jun Li Xing-Wang Li Hui Li Guo-Hui Fan Xiao-Ying Gu Yan Xiao Hong Gao Jiu-Yang Xu Fan Yang Xin-Ming Wang Chao Wu Lan Chen Yi-Wei Liu Bo Liu Jian Yang Xiao-Rui Wang Jie Dong Li Li Chao-Lin Huang Jian-Ping Zhao Yi Hu Zhen-Shun Cheng Un-Lin Liu Zhao-Hui Qian Chuan Qin Qi Jin Bin Cao Jian-Wei Wang 2020Chinese Medical Journal2020,,9:99
2Prevalence of Autism Spectrum Disorder in China:A Nationwide Multi-center Population-based Study Among Children Aged 6 to 12 Years显示文摘This study aimed to obtain the first national estimate of the prevalence of autism spectrum disorder(ASD) in Chinese children.We targeted the population of 6 to 12-year-old children for this prevalence study by multistage convenient cluster sampling.The Modified Chinese Autism Spectrum Rating Scale was used for the screening process.Of the target population of 142,086 children,88.5%(n=125,806) participated in the study.A total of 363 children were confirmed as having ASD.The observed ASD prevalence rate was 0.29%(95% CI:0.26%-0.32%) for the overall population.After adjustment for response rates,the estimated number of ASD cases was867 in the target population sample,thereby achieving an estimated prevalence of 0.70%(95% CI:0.64%-0.74%).The prevalence was significantly higher in boys than in girls(0.95%;95% CI:0.87%-1.02% versus 0.30%;95%CI:0.26%-0.34%;P <0.001).Of the 363 confirmed ASD cases,43.3% were newly diagnosed,and most of those(90.4%) were attending regular schools,and 68.8% of the children with ASD had at least one neuropsychiatric comorbidity.Our findings provide reliable data on the estimated ASD prevalence and comorbidities in Chinese children.Hao Zhou Xiu Xu Weili Yan Xiaobing Zou Lijie Wu Xuerong Luo Tingyu Li Yi Huang Hongyan Guan Xiang Chen Meng Mao Kun Xia Lan Zhang Erzhen Li Xiaoling Ge Lili Zhang Chunpei Li Xudong Zhang Yuanfeng Zhou Ding Ding Andy Shih Eric Fombonne Yi Zheng Jisheng Han Zhongsheng Sun Yong-hui Jiang Yi Wang LATENT-NHC Study Team 2020Neuroscience Bulletin2020,36,9:158
3Does Helicobacter pylori infection play a role in iron deficiency anemia? A meta-analysis显示文摘AIM:To perform a meta-analysis of observational studies and randomized controlled trials(RCTs)on the association between Helicobacter pylori(H.pylori)and iron deficiency anemia(IDA).METHODS:A defined search strategy was used to search Medline,Embase,the Cochrane Library,Clinical Trials,Cochrane Central Register of Controlled Trials,Premedline and Healthstar.Odds ratio(OR)was used to evaluate observational epidemiology studies,and weighted mean difference(WMD)was used to demonstrate the difference between control and intervention groups.RESULTS:Fifteen observational studies and 5 RCTs were identified and used for calculation.The pooled OR for observational studies was 2.22(95%CI:1.52-3.24,P<0.0001).The WMD for hemoglobin(HB) was 4.06 g/L(95%CI:-2.57-10.69,P=0.01),and the WMD for serum ferritin(SF)was 9.47μg/L(95%CI:-0.50-19.43,P<0.0001).Results were heterogeneous for all comparisons.CONCLUSION:This meta-analysis on observational studies suggests an association between H.pylori and IDA.In RCTs,eradication of H.pylori can improve HB and SF levels but not significantly.Qu, Xin-Hua Huang, Xiao-Lu Xiong, Ping Zhu, Cui-Ying Huang, You-Liang Lu, Lun-Gen Sun, Xu Rong, Lan Zhong, Liang Sun, Da-Yu Lin, Hai Cai, Ming-Ci Chen, Zhi-Wei Hu, Bing Wu, Lian-Ming Jiang, Yi-Bin Yan, Wei-Li 2010World Journal of Gastroenterology2010,16,7:34
4Differentiation profile of brain tumor stem cells:a comparative study with neural stem cells显示文摘大脑肿瘤干细胞(BTSC ) 的区别侧面的理解,在肿瘤房间人口之中的关键的,将通过有神经干细胞(NSC ) 的比较借卓见进 glioma 的起源并且最终产出新途径与这难处理的疾病作斗争。这里,我们从外科的 glioma 标本的有教养、净化的 BTSC 和 NSCsfrom 人的胎儿的大脑织物,并且进一步分析了他们的细胞的生物行为,他们的特别区别性质。是期望,区分进成熟神经显型的 NSC。然而, BTSC 展出了的 Inthe 一样的区别状况区分了差别。词法上,房间变得变平并且属于第一个星期,但是逐渐地此后聚集了并且改过漂浮的肿瘤范围。在相应时期期间,无差别的房间标记 CD133 和巢在的表示率在 BTSC 不停地减少,但是 1 个星期以后,他们重获上升趋势。有趣地,区分的房间标记 GFAP 和 beta-tubulinIIIshowed 表示变化逆到无差别的房间标记的。总起来说, BTSCswere 揭示了拥有一个能力抵抗区别,它实际上代表 glioma 的恶意的行为。Quan Bin Zhang Xiao Yan Ji Qiang Huang Jun Dong Yu De Zhu Qing Lan 2006Cell Research2006,16,12:34
5Roles of Fas signaling pathway in vitamin E succinateinduced apoptosis in human gastric cancer SGC-7901 cells显示文摘AIM: To investigate the roles of Fas signaling pathway in vitamin E succinate-induced apoptosis in human gastric cancer SGC-7901 cells.METHODS: Human gastric cancer SGC-7901 cells were treated with VES at 5, 10, 20 mg@L-1, succinic acid and vitamin E as vehicle control and condition media only as untreated (UT) control. Apoptotic morphology was observed by DAPI staining. Western blot analysis was applied to measure the expression of Fas, FADD and caspase-8 proteins. After the cells were transiently transfected with Fas and FADD antisense oligonucleotides, respectively, caspase-8 activity was determined by flurometric method.RESULTS: The morphologically apoptotic changes were observed after VES treatment by DAPI staining. 23.7 % and 89.6 % apoptosis occurred after 24 h and 48 h of 20 mg@L-1 VES treatment, respectively. The protein levels of Fas, FADD and caspase-8 were evidently increased in a dose-dependent manner after 24 h of VES treatment. The blockage of Fas by transfection with Fas antisense oligonucleotides obviously inhibited the expression of FADD protein. After SGC-7901 cells were transfected with Fas and FADD antisense oligonucleotides, caspase-8 activity was obviously decreased (P<0.01), whereas Fas blocked more than FADD.CONCLUSION: VES-induced apoptosis in human gastric cancer SGC-7901 cells involves Fas signaling pathway including the interaction of Fas, FADD and caspase-8.Kun Wu Yao Li Yan Zhao Yu-Juan Shah Wei Xia Lan Zhao,Department of Nutrition and Food Hygiene,Public Health School,Harbin Medical University,Harbin 150001,Heilongjiang Province,China Wei-Ping Yu,Genetics Institute,Texas University of USA,Austin,USA 2002World Journal of Gastroenterology2002,8,6:30
6Hepatocellular carcinoma redirects to ketolysis for progression under nutrition deprivation stress显示文摘癌症房间以他们的能力著名给新陈代谢的小径换新电线在各种各样的压力条件下面支持幸存和增长。尽管在肝生产了,酉同类身体没在正常的成年的肝房间被消费。我们这里发现酉同类分解代谢或 ketolysis 在 hepatocellular 被重新激活在营养剥夺条件下面的癌(HCC ) 房间。机械学地, 3-oxoacid CoA-transferase 1 (OXCT1 ) ,其表情在正常的成年的肝纸巾被压制的限制率的 ketolytic 酶,被浆液重新导致被触发饥饿的 mTORC2-AKT-SP1 在 HCC 房间发信号。而且,我们观察到在 HCC 的那提高的 ketolysis 为 AMPK 激活的压抑是批评的并且保护 HCC 房间免受过多的 autophagy 的伤害,从而提高肿瘤生长。重要地,临床的 HCC 样品的分析表明那增加的 OXCT1 表情预言更高耐心的死亡。一起拿,我们这里揭开剥夺营养的 HCC 房间为精力由采用酉同类身体的新奇新陈代谢的改编供应和癌症前进。De Huang Tingting Li Lin Wang Long Zhang Ronghui Yan Kui Li Songge Xing Gongwei Wu Lan Hu Weidong Jia Sheng-Cai Lin Chi V Dang Libing Song Ping Gao Huafeng Zhang 2016Cell Research2016,26,10:27
7Rapid changes of microsatellite flanking sequence in the allopolyploidization of new synthesized hexaploid wheat显示文摘It was suggested that the rapid changes of DNA sequence and gene expression oc- curred at the early stages of allopolyploid formation. In this study, we revealed the microsatellite (SSR) differences between newly formed allopolyploids and their donor parents by using 21 primer sets specific for D genome of wheat. It was indicated that rapid changes had occurred in the “shock” process of the allopolyploid formation between tetraploid wheat and Aegilops tauschii. The changes of SSR flanking sequence resulted in appearance of novel bands or disappearance of parental bands. The disappearance of the parental bands showed much higher frequencies in comparison with that of appearance of novel bands. Disappearance of the parental bands was not random. The frequency of disappearance in tetraploid wheat was much higher than in Ae. tauschii, i. e. the disappearance frequency in AABB genome was much higher than in D genome. Changes of SSR flanking sequence occurred at the early stage of F1 hybrid or just after chro- mosome doubling. From the above results, it can be inferred that SSR flanking sequence region was very active and was amenable to change in the process of polyploidization. This suggested that SSR flanking sequence probably had special biological function at the early stage of ploy- ploidization. The rapid and directional changes at the early stage of polyploidization might con- tribute to the rapid evolution of the newly formed allopolyploid and allow the divergent genomes to act in harmony.ZHANG Lianquan LIU Dengcai YAN Zehong LAN Xiujin ZHENG Youliang ZHOU Yonghong 2004Science China(Life Sciences)2004,47,6:25
8A Simple CRISPR/Cas9 System for Multiplex Genome Editing in Rice显示文摘Generating mutants bearing multiple gene modifications is essential for determining the functions of gene family members with redundant functions,or for analyzing epistatic relationships in genetic pathways.Using conventional methods,mutants with multiple gene mutations are generated by several rounds of intercrossing plants carrying a single mutation and identification of the offspring.This process is both time-Chun Wang Lan Shen Yaping Fu Changjie Yan Kejian Wang 2015Journal of Genetics and Genomics2015,42,12:22
9Somatosensory neuron types identified by high-coverage single-cell RNA-sequencing and functional heterogeneity显示文摘感觉神经原被不同发信号的网络和接受特征区分。因此,感觉神经原类型能被连接基于 transcriptome 的神经原与感觉显型打字定义。这里,我们分类老鼠的 somatosensory 神经原由高范围的单个房间的定序 RNA 的背面的根中心(DRG )(10 950 ±1 218 基因每神经原) 并且神经原基于尺寸的层次聚类。而且,对皮肤的刺激作出回应的单个 DRG 神经原被记录用一在里面 vivo 整个房间的补丁夹钳技术并且由神经原类型分类基因标记。小直径 DRG 神经原被分类进低阀值的 mechanoreceptor 的一种类型和 mechanoheat nociceptors (MHN ) 的五种类型。每 MHN 类型进一步被分成二种子类型。大 DRG 神经原被分成四种类型,包括表示联系 BAI1 的蛋白质 2-like 的 neurexophilin 1 快车 MHN 和机械 nociceptors (MN ) 1 (Baiap2l1 ) 。表示 trafficking 蛋白质粒子建筑群 3-like 和 Baiap2l1 显著的 MN 的 Mechanoreceptors 各被细分进二种子类型。这些结果为编目 somatosensory 神经原和他们的 transcriptome 数据库提供一个新系统。Chang-Lin Li Kai-Cheng Li Dan Wu Yan Chen Hao Luo Jing-Rong Zhao Sa-Shuang Wang Ming-Ming Sun Ying-Jin Lu Yan-Qing Zhong Xu-Ye Hu Rui Hou Bei-Bei Zhou Lan Bao Hua-Sheng Xiao Xu Zhang 2016Cell Research2016,26,1:21
10Effects of Short-Term Forest Bathing on Human Health in a Broad-Leaved Evergreen Forest in Zhejiang Province,China显示文摘Objective To investigate the effects of short-term forest bathing on human health.Methods Twenty healthy male university students participated as subjects and were randomly divided into two groups of 10.One group was sent on a two-night trip to a broad-leaved evergreen forest,and the other was sent to a city area.Serum cytokine levels reflecting inflammatory and stress response,indicators reflecting oxidative stress,the distribution of leukocyte subsets,and plasma endothelin-1 (ET-1) concentrations were measured before and after the experiment to evaluate the positive health effects of forest environments.A profile of mood states (POMS) evaluation was used to assess changes in mood states.Results No significant differences in the baseline values of the indicators were observed between the two groups before the experiment.Subjects exposed to the forest environment showed reduced oxidative stress and pro-inflammatory level,as evidenced by decreased malondialdehyde,interleukin-6,and tumor necrosis factor α levels compared with the urban group.Serum cortisol levels were also lower than in the urban group.Notably,the concentration of plasma ET-1 was much lower in subjects exposed to the forest environment.The POMS evaluation showed that after exposure to the forest environment,subjects had lower scores in the negative subscales,and the score for vigor was increased.Conclusion Forest bathing is beneficial to human health,perhaps through preventive effects related to several pathological factors.MAO Gen Xiang LAN Xiao Guang CAO Yong Bao CHEN Zhuo Mei HE Zhi Huat LV Yuan Dong WANG Ya Zhen HU Xi Lian WANG Guo Fu YAN Jing 2012Biomedical and Environmental Sciences2012,25,3:20
11Petrogenesis of Late Cretaceous Jiangla'angzong I-Type Granite in Central Lhasa Terrane, Tibet, China: Constraints from Whole-Rock Geochemistry, Zircon U-Pb Geochronology, and Sr-Nd-Pb-Hf Isotopes显示文摘The Jiangla'angzong granite in the northern part of the Central Lhasa Terrane is composed of syenogranite and adamellite. LA-ICP-MS zircon U-Pb analyses suggest that syenogranite has a weighted mean ^(206) Pb/^(238) U age of 86±1 Ma(mean square weighted deviation=0.37), which is in accordance with the muscovite Ar-Ar age(85±1 Ma) of Cu-Au ore-bearing skarns and the zircon U-Pb age(84±1 Ma) of adamellite. This suggests that the Jiangla'angzong magmatism and Cu–Au mineralization events took place during the Late Cretaceous. The granite contains hornblende, biotite, and pyroxene, and does not contain Al-bearing minerals, such as muscovite, cordierite, and garnet. It has high contents of SiO_2(65.10–70.91 wt%), K_2O(3.44–5.17 wt%), and total K_2O+Na_2O(7.13–8.15 wt%), and moderate contents of A_(12)O_3(14.14–16.45 wt%) and CaO(2.33–4.11 wt%), with a Reitman index(σ43) of 2.18 to 2.33, and A/CNK values of 0.88 to 1.02. The P_2O_5 contents show a negative correlation with SiO_2, whereas Pb contents show a positive correlation with SiO_2. Th and Y contents are relatively low and show a negative correlation with the Rb contents. These characteristics suggest that the Jiangla'angzong granite is a high K calc–alkaline metaluminous I–type granite. It is enriched in light rare earth elements(LREE) and large ion lithofile elements(LILE), and depleted in heavy rare earth elements(HREE) and high field strength elements(HFSE), with LREE/HREE ratios of 11.7 to 18.1. The granite has negative Eu anomalies of 0.58 to 0.94 without obvious Ce anomalies(δCe=1.00–1.04). The relatively low initial 87 Sr/86 Sr ratios of 0.7106 to 0.7179, positive εHf(t) values of 1.0 to 4.1, and two-stage Hf model ages(TDM2) ranging from 889 Ma to 1082 Ma, These geochemical features indicate that the granite derived from a juvenile crust. The(^(143) Nd/^(144) Nd)_t values from the Jiangla'angzong granite range from 0.5121 to 0.5123, its εNd(t) values range from-10.17 to-6.10, its(^(206) Pb/^(204) Pb)_t values range from 18.683 to 18.746, its(^(207) Pb/^(204) Pb)_t values range from 15.695 to 15.700, and its(^(208) Pb/^(204) Pb)_t values range from 39.012 to 39.071. These data indicate that the granite was formed by melting of the upper crust with the addition of some mantle materials. We propose that the Jiangla'angzong granite was formed during the postcollision extension of the Qiangtang and Lhasa terranes.LIU Hong LI Guangming HUANG Hanxiao CAO Huawen YUAN Qian LI Yingxu OUYANG Yuan LAN Shuangshuang LU Menghong YAN Guoqiang 2018Acta Geologica Sinica(English Edition)2018,92,4:20
12Diagnostic Values of Vascular Endothelial Growth Factor and Epidermal Growth Factor Receptor for Benign and Malignant Hydrothorax显示文摘Yan Gu Min Zhang Guo-Hua Li Jun-Zhen Gao Liping Guo Xiao-Juan Qiao Li-Hong Wang Lan He Mei-Ling Wang Li Yan Xiu-Hua Fu 2015Chinese Medical Journal2015,,3:19
13Role of different childbirth strategies on pelvic organ prolapse and stress urinary incontinence: a prospective study显示文摘背景:筋膜、肌肉发达的支持结构的创伤的损坏可以在分娩期间是压力尿失禁(穗) 和骨盆的机关脱垂(流行音乐) 的发展的一个主要因素。这研究的目的是有希望地在流行音乐和穗上调查不同分娩策略的角色。方法:120 个选择怀孕女人的一个总数被招募并且把组划分了成二:阴道交货组(n = 72 ) 并且选择恺撒的交货组(n = 48 ) 。这些女人与穗表被询问并且在 6 以内与流行音乐数量化离子(POP-Q ) 估计了 - 在交货以后的 8 个星期。穗的关联和有交货的策略的 POP-Q 的结果被分析。t, chi (2 ) 测试,和 Mann-Witney 测试被用于统计分析。结果:在 120 个女人之中,穗在 29 期间被开发 - 在 20 个病人(16.6%) 的 30 个妊娠的星期,谁(70%) 14 有穗的症状到 6 个星期为止产后。完全 20 (16.6%) 女人们在交货以后有穗症状。产后的穗的流行断然在 29 期间与穗的出现被相关 - 30 个妊娠的星期(P < 0.001 ) 。在阴道交货组,承受的女人的 100% 形成 6 个星期产后的尿脱垂,当 87.5% 那些在选择恺撒的交货组织发达流行音乐时(P < 0.01 ) 。在阴道交货组的一度、二度的尿脱垂的百分比分别地是 20.8% 和 79.2% ,它与在选择恺撒的交货组的那些显著地不同(64.6% 和 22.9% ;两 P = 0.000 ) 。结论:怀孕和交货在穗和流行音乐的发展起一个病因学的作用。穗的发作在迟了的怀孕期间暗示产后的穗症状的重要风险。流行音乐的流行比在恺撒的交货以后在阴道交货以后是显著地更高的。ZHU Lan BIAN Xu-ming LONG Yan LANG Jing-he 2008Chinese Medical Journal2008,,3:18
14QTL editing confers opposing yield performance in different rice varieties显示文摘Grain yield is one of the most important and complex trait for genetic improvement in crops; it is known to be controlled by a number of genes known as quantitative trait loci(QTLs). In the past decade, many yield-contributing QTLs have been identified in crops.However, it remains unclear whether those QTLs confer the same yield performance in different genetic backgrounds. Here, we performed CRISPR/Cas_9-mediated QTL editing in five widely-cultivated rice varieties and revealed that the same QTL can have diverse, even opposing, effects on grain yield in different genetic backgrounds.Lan Shen Chun Wang Yaping Fu Junjie Wang Qing Liu Xiaoming Zhang Changjie Yan Qian Qian Kejian Wang 2018Journal of Integrative Plant Biology2018,60,2:18
15Coinfection with influenza A virus enhances SARS-CoV-2 infectivity显示文摘The upcoming flu season in the Northern Hemisphere merging with the current COVID-19 pandemic raises a potentially severe threat to public health.Through experimental coinfection with influenza A virus(IAV)and either pseudotyped or live SARS-CoV-2 virus,we found that IAV preinfection significantly promoted the infectivity of SARS-CoV-2 in a broad range of cell types.Remarkably,in vivo,increased SARS-CoV-2 viral load and more severe lung damage were observed in mice coinfected with IAV.Moreover,such enhancement of SARS-CoV-2 infectivity was not observed with several other respiratory viruses,likely due to a unique feature of IAV to elevate ACE2 expression.This study illustrates that IAV has a unique ability to aggravate SARS-CoV-2 infection,and thus,prevention of IAV infection is of great significance during the COVID-19 pandemic.Lei Bai Yongliang Zhao Jiazhen Dong Simeng Liang Ming Guo Xinjin Liu Xin Wang Zhixiang Huang Xiaoyi Sun Zhen Zhang Lianghui Dong Qianyun Liu Yucheng Zheng Danping Niu Min Xiang Kun Song Jiajie Ye Wenchao Zheng Zhidong Tang Mingliang Tang Yu Zhou Chao Shen Li Zhou Yu Chen Huan Yan Ke Lan Ke Xu 2021Cell Research2021,31,4:16
16Novel and potent inhibitors targeting DHODH are broad-spectrum antivirals against RNA viruses including newly-emerged coronavirus SARS-CoV-2显示文摘Emerging and re-emerging RNA viruses occasionally cause epidemics and pandemics worldwide,such as the on-going outbreak of the novel coronavirus SARS-CoV-2.Herein,we identified two potent inhibitors of human DHODH,S312 and S416,with favorable drug-likeness and pharmacokinetic profiles,which all showed broad-spectrum antiviral effects against various RNA viruses,including influenza A virus,Zika virus,Ebola virus,and particularly against SARS-CoV-2.Notably,S416 is reported to be the most potent inhibitor so far with an EC5o of 17 nmol/L and an SI value of 10,505.88 in infec-ted cells.Our results are the first to validate that DHODH is an attractive host target through high antiviral efficacy in vivo and low virus replication in DHODH knock-out cells.This work demonstrates that both S312/S416 and old drugs(Leflunomide/Teriflunomide)with dual actions of antiviral and immuno-regulation may have clinical potentials to cure SARS-CoV-2 or other RNA viruses circulating worldwide,no matter such viruses are mutated or not.Rui Xiong Leike Zhang Shiliang Li Yuan Sun Minyi Ding Yong Wang Yongliang Zhao Yan Wu Weijuan Shang Xiaming Jiang Jiwei Shan Zihao Shen Yi Tong Liuxin Xu Yu Chen Yingle Liu Gang Zou Dimitri Lavillete Zhenjiang Zhao Rui Wang Lili Zhu Gengfu Xiao Ke Lan Honglin Li Ke Xu 2020Protein & Cell2020,11,10:14
17Improving Plant Genome Editing with High-Fidelity xCas9 and Non-canonical PAM-Targeting Cas9-NG显示文摘Two recently engineered SpCas9 variants, namely xCas9 and Cas9-NG, show promising potential in improving targeting specificity and broadening the targeting range. In this study, we evaluated these Cas9 variants in the model and crop plant, rice. We first tested xCas9-3.7, the most effective xCas9 variant in mammalian cells, for targeted mutagenesis at 16 possible NGN PAM (protospacer adjacent motif) combinations in duplicates. xCas9 exhibited nearly equivalent editing efficiency to wild-type Cas9 (Cas9-WT) at most canonical NGG PAM sites tested, whereas it showed limited activity at non-canonical NGH (H = A, C, T) PAM sites. High editing efficiency of xCas9 at NGG PAMs was further demonstrated with C to T base editing by both rAPOBECI and PmCDAI cytidine deaminases. With mismatched sgRNAs, we found that xCas9 had improved targeting specificity over the Cas9-WT. Furthermore, we tested two Cas9-NG variants, Cas9-NGv1 and Cas9-NG, for targeting NGN PAMs. Both Cas9-NG variants showed higher editing efficiency at most non-canonical NG PAM sites tested, and enabled much more efficient editing than xCas9 at AT-rich PAM sites such as GAT, GAA, and CAA. Nevertheless, we found that Cas9-NG variants showed significant reduced activity at the canonical NGG PAM sites. In stable transgenic rice lines, we demonstrated that Cas9-NG had much higher editing efficiency than Cas9-NGv1 and xCas9 at NG PAM sites. To expand the base-editing scope, we developed an efficient C to T base-editing system by making fusion of Cas9-NG nickase (D10A version), PmCDAI, and UGI. Taken together, our work benchmarked xCas9 as a high-fidelity nuclease for targeting canonical NGG PAMs and Cas9-NG as a preferred variant for targeting relaxed PAMs for plant genome editing.Zhaohui Zhong Simon Sretenovic Qiurong Ren Lijia Yang Yu Bao Caiyan Qi Mingzhu Yuan Yao He Shishi Liu Xiaopei Liu Jiaheng Wang Lan Huang Yan Wang Dibin Baby David Wang Tao Zhang Yiping Qi Yong Zhang 2019Molecular Plant2019,12,7:13
18Ionic liquid based dispersive liquid-liquid microextraction of aromatic amines in water samples显示文摘In this work,a new microextraction method termed ionic liquid based dispersive liquid-liquid microextraction(IL-DLLME) was demonstrated for the extraction of 2-methylaniline,4-chloroaniline,1-naphthylamine and 4-aminobiphenyl in aqueous matrices.After extraction the ionic liquid(IL)phase was injected directly into the high performance liquid chromatography(HPLC) system for determination.Some parameters that might affect the extraction efficiency were optimized.Under the optimum conditions,good linear relationship,sensitivity and reproducibility were obtained.The limits of detection(LOD,S/N=3)for the four analytes were in the range of 0.45-2.6μg L^(-1).The relative standard deviations(R.S.D.,n=6)were in the range of 6.2-9.8%. This method was applied for the analysis of the real water samples.The recoveries ranged from 93.4 to 106.4%.The main advantages of the method are high speed,high recovery,good repeatability and volatile organic solvent-free.Yun Chang Fan Zheng Liang Hu Mei Lan Chen Chao Shen Tu Yan Zhu 2008Chinese Chemical Letters2008,19,8:13
19Neolithic rice paddy from the Zhaojiazhuang site, Shandong, China显示文摘To identify and study the Neolithic rice paddy in Shandong, eastern China, is not only an important issue in the development of Chinese rice agriculture, but also a key part of the study on rice spread in East Asia. Due to the limitation of archaeological materials and the research methods, there have been no discoveries about the Neolithic rice paddy in Shandong Province for a long time. Based on the identification of possible rice paddy by archaeological excavation, phytolith analysis of soil samples from this 'paddy' has been systematically carried out and the results have shown a 4600—4300 years old rice paddy preserved at the Zhaojiazhuang site. This is the first examination and study of the rice paddy in North China by systematic phytolith analysis, which is very important for the Neolithic archaeological research and the study of the eastward spread of rice agricultural techniques in East Asia.JIN GuiYun YAN ShengDong Tetsuro UDATSU LAN YuFu WANG ChunYan TONG PeiHua 2007Chinese Science Bulletin2007,52,24:12
20Functional organization of complex brain networks modulated by acupuncture at different acupoints belonging to the same anatomic segment显示文摘CHEN Shang-jie MENG Lan YAN Hao BAI Li-jun WANG Fang HUANG Yong LI Jian-ping PENG Xu-ming SHI Xue-min 2012Chinese Medical Journal2012,,15:12
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