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295篇 您的检索式:作者名="Zhaohui Liu"
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1The human long non-coding RNA-RoR is a p53 repressor in response to DNA damage显示文摘在应力之上,肿瘤 suppressor p53 的水平显著地被提高,是众所周知的。然而尽管有广泛的研究,包含的内在的机制重要为导致压力的 p53 规定内部播放器仍然不充分被理解。我们人的 lincRNA-RoR (RoR ) 是 p53 的一个强壮的否定管理者的现在的证据。不同于通过 ubiquitin-proteasome 小径引起 p53 降级的 MDM2, RoR 通过和异构的原子 ribonucleoprotein 的直接相互作用压制 p53 翻译我(hnRNP 我) 。重要地,带 hnRNP 的一个 28 底 RoR 序列我有约束力的主题为 p53 压抑必要、足够。我们进一步证明 RoR 禁止调停 p53 的房间周期拘捕和 apoptosis。最后,我们表明 p53 transcriptionally 导致 RoR 表示的一个 RoR-p53 自动调整的反馈环。一起,这些结果建议 RoR-hnRNP I-p53 轴可以组成一个另外的监视网络让房间更好对各种各样的压力作出回应。Ali Zhang Nanjiang Zhou Jianguo Huang Qian Liu Koji Fukuda Ding Ma Zhaohui Lu Cunxue Bai Kounosuke Watabe Yin-Yuan Mo 2013Cell Research2013,23,3:47
2Massive individual orbital angular momentum channels for multiplexing enabled by Dammann gratings显示文摘Data transmission rates in optical communication systems are approaching the limits of conventional multiplexing methods.Orbital angular momentum(OAM)in optical vortex beams offers a new degree of freedom and the potential to increase the capacity of free-space optical communication systems,with OAM beams acting as information carriers for OAM division multiplexing(OAM-DM).We demonstrate independent collinear OAM channel generation,transmission and simultaneous detection using Dammann optical vortex gratings(DOVGs).We achieve 80/160 Tbit s^(-1) capacity with uniform power distributions along all channels,with 1600 individually modulated quadrature phase-shift keying(QPSK)/16-QAM data channels multiplexed by 10 OAM states,80 wavelengths and two polarizations.DOVG-enabled OAM multiplexing technology removes the bottleneck of massive OAM state parallel detection and offers an opportunity to raise optical communication systems capacity to Pbit s^(-1) level.Ting Lei Meng Zhang Yuru Li Ping Jia Gordon Ning Liu Xiaogeng Xu Zhaohui Li Changjun Min Jiao Lin Changyuan Yu Hanben Niu Xiaocong Yuan 2015Light(Science & Applications)2015,4,1:47
3Progress and recent trend in MILD combustion显示文摘Moderate or intense low oxygen dilution(MILD)combustion plays a significant role in the mitigation of combustion-generated pollutants and greenhouse gases whilst meeting thermal efficiency needs.However,due to the lack of the fundamental knowledge on this combustion,there is a misconception that MILD combustion should be established by high preheating of the air,which has limited its application.Our research and development on this combustion has been performed for several years. We have found that the requirements for establishing the MILD combustion are more relaxed than previously.It is also revealed that this combustion of different type,i.e.,non-premixed,partially premixed and fully premixed,can be achieved by firing various fuels(i.e.,gaseous,liquid and solid fuels).It is suggested that the application of the MILD combustion can be expanded significantly.The present review summarizes the progress and recent trend made in the R&D of this combustion and recommends further fundamental studies for improving our knowledge and widening its applications.LI PengFei MI JianChun DALLY B B WANG FeiFei WANG Lin LIU ZhaoHui CHEN Sheng ZHENG ChuGuang 2011Science China(Technological Sciences)2011,54,2:31
4Gain-of-function mutant p53 in cancer progression and therapy显示文摘p53 is a key tumor suppressor,and loss of p53 function is frequently a prerequisite for cancer development.The p53 gene is the most frequently mutated gene in human cancers;p53 mutations occur in>50%of all human cancers and in almost every type of human cancers.Most of p53 mutations in cancers are missense mutations,which produce the full-length mutant p53(mutp53)protein with only one amino acid difference from wild-type p53 protein.In addition to loss of the tumor-suppressive function of wild-type p53,many mutp53 proteins acquire new oncogenic activities independently of wild-type p53 to promote cancer progression,termed gain-of-function(GOF).Mutp53 protein often accumulates to very high levels in cancer cells,which is critical for its GOF.Given the high mutation frequency of the p53 gene and the GOF activities of mutp53 in cancer,therapies targeting mutp53 have attracted great interest.Further understanding the mechanisms underlying mutp53 protein accumulation and GOF will help develop effective therapies treating human cancers containing mutp53.In this review,we summarize the recent advances in the studies on mutp53 regulation and GOF as well as therapies targeting mutp53 in human cancers.Cen Zhang Juan Liu Dandan Xu Tianliang Zhang Wenwei Hu Zhaohui Feng 2020Journal of Molecular Cell Biology2020,12,9:18
5Human monoclonal antibodies block the binding of SARS-CoV-2 spike protein to angiotensin converting enzyme 2 receptor显示文摘According to the World Health Organization(WHO)newly updated situation report on March 18th,2020,the coronavirus disease 2019(COVID-19)pandemic has confirmed 191,127 cases and claimed 7807 deaths worldwide.1 The etiological agent of COVID-19 has been identified as a novel coronavirus,the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),belonging to Sarbecovirus subgenus(genus Betacoronavirus,family Coronaviridae)and showing 79.6 and 96.2%sequence identity in nucleotide to SARS-CoV and a bat coronavirus(BatCoV RaTG13),respectively.2–4 Like SARS-CoV infection,a substantial fraction of COVID-19 patients exhibits severe respiratory symptoms and has to be hospitalized in intensive care unit.5–8 Although the mortality rate of COVID-19 is significantly lower than that of SARS-CoV infection,SARS-CoV-2 shows much higher human-to-human transmission rate,rapidly leading to a global pandemic declared by WHO on March 11th,2020.Xiangyu Chen Ren Li Zhiwei Pan Chunfang Qian Yang Yang Renrong You Jing Zhao Pinghuang Liu Leiqiong Gao Zhirong Li Qizhao Huang Lifan Xu Jianfang Tang Qin Tian Wei Yao Li Hu Xiaofeng Yan Xinyuan Zhou Yuzhang Wu Kai Deng Zheng Zhang Zhaohui Qian Yaokai Chen Lilin Ye 2020Cellular & Molecular Immunology2020,17,6:17
6Tumor suppressor p53 and its gain-of-function mutants in cancer显示文摘肿瘤 suppressor p53 在肿瘤抑制起一个枢轴的作用。p53 是在癌症的最经常变异的基因。作为 transcriptionfactor, p53 主要通过它的下游的目标 genes.Thus, p53 和它的目标基因形式的 transcriptional 规定在肿瘤抑制施加它的角色表明小径调整许多生物过程 toprevent tumorigenesis 的复杂 p53。最近的研究除了 apoptosis ,房间周期拘捕和老朽揭示了那,在新陈代谢和抗氧化剂防卫进一步在肿瘤 suppression.Studies 显著地贡献到它的角色的精力的规定的 p53'sfunctions 表演许多联系肿瘤的变异的 p53 蛋白质不仅失去肿瘤 wild-typep53 的镇压功能,而且获得独立于野类型的 p53 的新 oncogenic 活动包括支持肿瘤房间增长,幸存,新陈代谢的变化,野类型的 p53 功能的 frequentloss 和在肿瘤使 p53 成为的人的变异的 p53 的 gain-of-function 极其吸引人的 targetfor 癌症治疗。不同策略和许多小分子的药为基于 p53 的肿瘤 therapy.Here 正在被开发,我们在肿瘤开发在肿瘤抑制和 gain-of-function 异种 p53 考察 p53 的机制,也 asthe 在基于 p53 的肿瘤治疗的发展的最近的进展。Juan Liu Cen Zhang Zhaohui Feng 2014Acta Biochimica et Biophysica Sinica2014,46,3:15
7Improving 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
8Growth response and toxic effects of three antibiotics on Selenastrum capricornutum evaluated by photosynthetic rate and chlorophyll biosynthesis显示文摘The effects of three types of antibiotics (erythromycin,ciprofloxacin and sulfamethoxazole) on the photosynthesis of freshwater algae,Selenastrum capricornutum Printz,were investigated by determining the growth rate,chloroplast pigments content,seven main precursors (including δ-aminolevulinic acid,porphobilinogen,uroporphyrinogen III,coproporphyrinogen III,protoporphyrin IX,Mg-proporphyrin IX and protochlorophyllide),and photosynthetic rate during chlorophyll biosynthesis.The antibiotics significantly decreased the growth rate,chlorophyll content,and photosynthetic rate.Erythromycin induced a decreasing effect at a concentration of 0.06 mg/L,while ciprofloxacin and sulfamethoxazole achieved the same results at concentrations higher than 1.5 mg/L.Only erythromycin significantly inhibited chlorophyll biosynthesis,which indicated that it was considerably more toxic to S.capricornutum than ciprofloxacin and sulfamethoxazole,and may pose a high potential risk to aquatic ecosystems.Binyang Liu Weiqiu Liu Xiangping Nie Chao Guan Yufeng Yang Zhaohui Wang Wei Liao 2011Journal of Environmental Sciences2011,23,9:11
9Clinical applications of MARSALA for preimplantation genetic diagnosis of spinal muscular atrophy显示文摘Conventional PCR methods combined with linkage analysis based on short tandem repeats(STRs) or Karyomapping with single nucleotide polymorphism(SNP) arrays, have been applied to preimplantation genetic diagnosis(PGD) for spinal muscular atrophy(SMA), an autosome recessive disorder. However, it has limitations in SMA diagnosis by Karyomapping, and these methods are unable to distinguish wildtype embryos with carriers effectively. Mutated allele revealed by sequencing with aneuploidy and linkage analyses(MARSALA) is a new method allowing embryo selection by a one-step next-generation sequencing(NGS) procedure, which has been applied in PGD for both autosome dominant and X-linked diseases in our group previously. In this study, we carried out PGD based on MARSALA for two carrier families with SMA affected children. As a result, one of the couples has given birth to a healthy baby free of mutations in SMA-causing gene. It is the first time that MARSALA was applied to PGD for SMA, and we can distinguish the embryos with heterozygous deletion(carriers) from the wild-type(normal) ones accurately through this NGS-based method. In addition, direct mutation detection allows us to identify the affected embryos(homozygous deletion), which can be regarded as probands for linkage analysis, in case that the affected family member is absent. In the future, the NGS-based MARSALA method is expected to be used in PGD for all monogenetic disorders with known pathogenic gene mutation.Yixin Ren Xu Zhi Xiaohui Zhu Jin Huang Ying Lian Rong Li Hongyan Jin Yan Zhang Wenxin Zhang Yanli Nie Yuan Wei Zhaohui Liu Donghong Song Ping Liu Jie Qiao Liying Yan 2016Journal of Genetics and Genomics2016,43,9:9
10Targeted Mutagenesis of NAC Transcription Factor Gene,OsN AC041,Leading to Salt Sensitivity in Rice显示文摘Salinity is a major abiotic stress factor that seriously affects plant growth. Many genes are involved in the response to salt stress with various metabolism pathways. A number of plant transcription factor family genes have been found to be involved in the salt stress response, and NAM, ATAF and CUC(NAC) transcription factors are thought to act as active regulators during abiotic stress, especially salt stress. In this study, we detected a rice NAC transcription factor coding gene, OsNAC041, and confirmed that it influenced the germination of seeds under salt stress and salt tolerance of plants. OsNAC041 was primarily expressed in the leaves and located in the nucleus. Furthermore, the CRISPR/Cas9 method was used to obtain a targeted osnac041 mutant, of which the plant height was higher than that of the wild-type, showing increased salt sensitivity. Moreover, RNA-seq analysis revealed a number of differentially expressed genes(DEGs) involved in several important signaling pathways in the osnac041 mutant. Subsequently, Kyoto Encyclopedia of Genes and Genomes annotation also revealed differential expression of DEGs associated with mitogen-activated protein kinase signaling, peroxisome, eukaryotictype ABC transporters, photosynthesis and plant hormones, which are involved in stress-related signaling pathways. Overall, our study suggested that OsNAC041 was involved in the salt stress response in rice. These findings not only provide empirical evidence of OsNAC041 function, but also provide new insight into its potential application in rice resistance breeding.WANG Bo ZHONG Zhaohui ZHANG Huanhuan WANG Xia LIU Binglin YANG Lijia HAN Xiangyan YU Deshui ZHENG Xuelian WANG Chunguo SONG Wenqin CHEN Chengbin ZHANG Yong 2019Rice science2019,26,2:8
11Effect of particle inertia on temperature statistics in particle-laden homogeneous isotropic turbulence显示文摘The fluid temperature statistics along particle trajectories is crucial to under- stand the mechanisms of turbulent non-isothermal or reactive fluid-particle flow, especially for the Lagrangian model of non-isothermal particle-laden turbulent flow. In the present study, direct numerical simulations were utilized to generate temperature field statistics in particle-laden incompressible stationary homogeneous isotropic turbulent flows, which is focused on the effect of particle response time on the Lagrangian statistics of the particle and the fluid temperature seen by particles. It shows that, for the particles with τp/τk < 1, the ratio of the fluid intensity seen by particle to fluid temperature intensities deceased as τp/τk increased; while for larger particles (τp/τk > 1), the trend is inversed. For small parti- cles (τp/τk<5), the Lagrangian autocorrelation coefficient of the particle temperature RpT decreases as the particle inertia (τp/τk) increases. The trend is reversed for larger particles. The autocorrelation of fluid temperature along the particle path, RpfT, decreased as the particle inertia increased. And as the particle inertia increased, the autocorrelation coeffi- cient of the fluid temperature seen by particle decreased more rapidly than that of the particle temperature. The mean temperature gradient contributes to the correlation be- tween the particles velocity component and temperature fluctuations in the direction of the gradient. For the particles with τp/τk<1, the magnitude of the correlation coefficient in- creases as the particle inertia increases, while this value is independent of the particle time constant for larger particles.HE Zhu LIU Zhaohui CHEN Sheng LIU Yaming ZHENG Chuguang 2006Science China(Technological Sciences)2006,49,2:8
12Analysis of DNA methylation variation in wheat genetic background after alien chromatin introduction based on methylation-sensitive amplification polymorphism显示文摘During the process of alien germplasm introduced into wheat genome by chromosome engineering, extensive genetic variations of genome structure and gene expression in recipient could be induced. In this study, we performed GISH (genome in situ hybridization) and AFLP (amplified fragment length po-lymorphism) on wheat-rye chromosome translocation lines and their parents to detect the identity in genomic structure of different translocation lines. The results showed that the genome primary struc-ture variations were not obviously detected in different translocation lines except the same 1RS chromosome translocation. Methylation sensitive amplification polymorphism (MSAP) analyses on genomic DNA showed that the ratios of fully-methylated sites were significantly increased in translo-cation lines (CN12, 20.15%; CN17, 20.91%; CN18, 22.42%), but the ratios of hemimethylated sites were significantly lowered (CN12, 21.41%; CN17, 23.43%; CN18, 22.42%), whereas 16.37% were fully-me-thylated and 25.44% were hemimethylated in case of their wheat parent. Twenty-nine classes of me-thylation patterns were identified in a comparative assay of cytosine methylation patterns between wheat-rye translocation lines and their wheat parent, including 13 hypermethylation patterns (33.74%), 9 demethylation patterns (22.76%) and 7 uncertain patterns (4.07%). In further sequence analysis, the alterations of methylation pattern affected both repetitive DNA sequences, such as retrotransposons and tandem repetitive sequences, and low-copy DNA.ZHANG Yong LIU ZhaoHui LIU Cheng YANG ZuJun DENG KeJun PENG JinHua ZHOU JianPing LI GuangRong TANG ZongXiang REN ZhengLong 2008Chinese Science Bulletin2008,53,1:8
13MicroRNA-638 inhibits cell proliferation by targeting phospholipase D1 in human gastric carcinoma显示文摘MicroRNAs (miRNAs ) 是经常是玩的小非编码的 RNA 的一种类型在 carcinogenesis 的重要角色,而是 miRNAs 的 carcinogenic 机制仍然是不清楚的。这研究将在癌(GC ) 调查功能和 miR-638 的机制。在 GC 和 miR-638 的 DNA 拷贝数字的 miR-638 的表示被即时 PCR 检测。房间增长上的 miR-638 的效果被数 kit-8 试金测量。不同试金,包括生物信息学算法(TargetScan 并且人权保护) ,酶报告试金并且西方的弄污,被用来在 GC 识别 miR-638 的目标基因。在临床的 CRC 纸巾的 miR-638 目标基因的表示被 immunohistochemical 试金也验证。从这研究,我们发现 miR-638 与相应 noncancerous 纸巾(NCT ) 相比是在 GC 纸巾的 downregulated,并且 miR-638 的 DNA 拷贝数字比 NCT 在 GC 是更低的,它可以在 GC 导致 miR-638 的相应 downregulation。miR-638 的宫外的表示在 vitro 禁止了 GC 细胞生长。随后,我们鉴别 PLD1 是在 GC,和 silencing PLD1 表示 phenocopied 的 miR-638 的目标基因 GC 房间增长上的 miR-638 的禁止的效果。而且,我们观察到 PLD1 是在在预言的 GC 的 PLD1 的 GC 纸巾,和高表示的 overexpressed 差的全面幸存。在摘要,我们表明 miR-638 通过禁止 PLD1 在 GC 作为肿瘤 suppressor 工作。Jiwei Zhang Zehua Bian Jialiang Zhou Mingxu Song Zhihui Liu Yuyang Feng Li Zhe Binbin Zhang Yuan Yin Zhaohui Huang 2015Protein & Cell2015,6,9:8
14Sensitivity-enhanced surface plasmon resonance sensor utilizing a tungsten disulfide (WS_2) nanosheets overlayer显示文摘Tungsten disulfide(WS_2), as a representative layered transition metal dichalcogenide(TMDC) material, possesses important potential for applications in highly sensitive sensors. Here, a sensitivity-enhanced surface plasmon resonance(SPR) sensor with a metal film modified by an overlayer of WS_2 nanosheets is proposed and demonstrated. The SPR sensitivity is related to the thickness of the WS_2 overlayer, which can be tailored by coating a WS_2 ethanol suspension with different concentrations or by the number of times of repeated post-coating.Benefitting from its large surface area, high refractive index, and unique optoelectronic properties, the WS_2 nanosheet overlayer coated on the gold film significantly improves the sensing sensitivity. The highest sensitivity(up to 2459.3 nm∕RIU) in the experiment is achieved by coating the WS_2 suspension once. Compared to the case without a WS_2 overlayer, this result shows a sensitivity enhancement of 26.6%. The influence of the WS_2 nanosheet overlayer on the sensing performance improvement is analyzed and discussed. Moreover, the proposed WS_2 SPR sensor has a linear correlation coefficient of 99.76% in refractive index range of 1.333 to 1.360. Besides sensitivity enhancement, the WS_2 nanosheet overlayer is able to show additional advantages, such as protection of metal film from oxidation, tunability of the resonance wavelength region, biocompatibility, capability of vapor,and gas sensing.HAO WANG HUI ZHANG JIANGLI DONG SHIQI HU WENGUO ZHU WENTAO QIU HUIHUI LU JIANHUI YU HEYUAN GUAN SHECHENG GAO ZHAOHUI LI WEIPING LIU MIAO HE JUN ZHANG ZHE CHEN YUNHAN LUO 2018Photonics Research2018,6,6:8
15Fundamental and Technical Challenges for a Compatible Design Scheme of Oxyfuel Combustion Technology显示文摘Oxyfuel combustion with carbon capture and sequestration(CCS) is a carbon-reduction technology for use in large-scale coal-fired power plants. Significant progress has been achieved in the research and development of this technology during its scaling up from 0.4 MWth to 3 MWth and 35 MWth by the combined efforts of universities and industries in China. A prefeasibility study on a 200 MWe large-scale demonstration has progressed well, and is ready for implementation. The overall research development and demonstration(RD&D) roadmap for oxyfuel combustion in China has become a critical component of the global RD&D roadmap for oxyfuel combustion. An air combustion/oxyfuel combustion compatible design philosophy was developed during the RD&D process. In this paper, we briefly address fundamental research and technology innovation efforts regarding several technical challenges, including combustion stability, heat transfer, system operation, mineral impurities, and corrosion. To further reduce the cost of carbon capture, in addition to the large-scale deployment of oxyfuel technology, increasing interest is anticipated in the novel and nextgeneration oxyfuel combustion technologies that are briefly introduced here, including a new oxygen-production concept and flameless oxyfuel combustion.Chuguang Zheng Zhaohui Liu Jun Xiang Liqi Zhang Shihong Zhang Cong Luo Yongchun Zhao 2015Engineering2015,1,1:7
16Effect of microstructure evolution on mechanical property of extruded Mg-12Gd-2Er-1Zn-0.6Zr alloys显示文摘The microstructure evolution of as-cast,as-extruded and peak-aged Mg-12Gd-2Er-1Zn-0.6Zr alloys were investigated by Optical Microscope(OM),X-ray Diffraction(XRD),Scanning Electron Microscope(SEM)and Transmission Electron Microscope(TEM).The mechanical performance was also tested by tensile test at room temperature in the present study.The results indicated that the lamellar 14H-LPSO structure formed during the solid solution process at 793 K for 24 h,and also existed after hot extrusion process.The dynamic recrystallization(DRX)occurred during hot extrusion.The DRXed fine grain size was∼5μm.Meanwhile,some un-DRXed grains contained LPSO structure had a roughly orientation along the extrusion direction.The tensile test result showed that the as-extruded alloy had a better elongation of 14%due to fine DRXed grain and fiber-like un-DRXed with LPSO structure attributed to the high elongation.Because of the precipitation of theβ′-phase,the ultimate tensile strength(UTS)and yield tensile strength(YTS)increased up to 415 MPa(UTS)and 374 MPa(YTS),respectively.Kai Wen Ke Liu Zhaohui Wang Shubo Li Wenbo Du 2015Journal of Magnesium and Alloys2015,3,1:7
17Blunted nitric oxide regulation in Tibetans under high-altitude hypoxia显示文摘Nitric oxide(NO) is an important molecule for vasomotor tone, and elevated NO signaling was previously hypothesized as a unique and adaptive physiological change in highland Tibetans. However, there has been lack of NO data from Tibetans living at low altitude and lowlander immigrants living at high altitude, which is crucial to test this hypothesis. Here, through cross-altitude(1990–5018 m) and cross-population(Tibetans and Han Chinese) analyses of serum NO metabolites(NOx) of 2086 individuals, we demonstrate that although Tibetans have a higher serum NOx level compared to lowlanders, Han Chinese immigrants living at high altitude show an even higher level than Tibetans. Consequently, our data contradict the previous proposal of increased NO signaling as the unique adaptive strategy in Tibetans.Instead, Tibetans have a relatively lower circulating NOx level at high altitude. This observation is further supported by data from the hypoxic experiments using human umbilical vein endothelial cells and gene knockout mice. No difference is detected between Tibetans and Han Chinese for endothelial nitric oxide synthase(e NOS), the key enzyme for circulating NO synthesis, suggesting that e NOS itself is unlikely to be the cause. We show that other NO synthesis-related genes(e.g. GCH1) carry Tibetan-enriched mutations significantly associated with the level of circulating NOx in Tibetans. Furthermore, gene network analysis revealed that the downregulation and upregulation of NOx is possibly achieved through distinct pathways.Collectively, our findings provide novel insights into the physiological and genetic mechanisms of the evolutionary adaptation of Tibetans to high-altitude hypoxia.Yaoxi He Xuebin Qi Ouzhuluobu Shiming Liu Jun Li Hui Zhang Baimakangzhuo Caijuan Bai Wangshan Zheng Yongbo Guo Duojizhuoma Baimayangji Dejiquzong Bianba Gonggalanzi Yongyue Pan Qula Kangmin Cirenyangji Wei Guo Yangla Yi Peng Xiaoming Zhang Kun Xiang Zhaohui Yang Liangbang Wang Gengdeng Yanfeng Zhang Tianyi Wu Bing Su Chaoying Cui 2018National Science Review2018,5,4:7
18Optical observations of LIGO source GW 170817 by the Antarctic Survey Telescopes at Dome A,Antarctica显示文摘The LIGO detection of gravitational waves(GW) from merging black holes in 2015 marked the beginning of a new era in observational astronomy. The detection of an electromagnetic signal from a GW source is the critical next step to explore in detail the physics involved. The Antarctic Survey Telescopes(AST3),located at Dome A, Antarctica, is uniquely situated for rapid response time-domain astronomy with its continuous night-time coverage during the austral winter. We report optical observations of the GW source(GW 170817) in the nearby galaxy NGC 4993 using AST3. The data show a rapidly fading transient at around 1 day after the GW trigger, with the i-band magnitude declining from 17:23 ± 0:13 magnitude to 17:72 ± 0:09 magnitude in ~1:8 h. The brightness and time evolution of the optical transient associated with GW 170817 are broadly consistent with the predictions of models involving merging binary neutron stars. We infer from our data that the merging process ejected about ~10^(-2) solar mass of radioactive material at a speed of up to 30% the speed of light.lei hu xuefeng wu igor andreoni michael c.b.ashley jeff cooke xiangqun cui fujia du zigao dai bozhong gu yi hu haiping lu xiaoyan li zhengyang li ensi liang liangduan liu bin ma zhaohui shang tianrui sun n.b.suntzeff charling tao syed a.uddin lifan wang xiaofeng wang haikun wen di xiao jin xu ji yang shihai yang xiangyan yuan hongyan zhou hui zhang jilin zhou zonghong zhu 2017Science Bulletin2017,62,21:6
19Mycorrhizal symbiosis modulates the rhizosphere microbiota to promote rhizobia–legume symbiosis显示文摘Plants establish symbioses with mutualistic fungi,such as arbuscular mycorrhizal(AM)fungi,and bacteria,such as rhizobia,to exchange key nutrients and thrive.Plants and symbionts have coevolved and represent vital components of terrestrial ecosystems.Plants employ an ancestral AM signaling pathway to establish intracellular symbioses,including the legume–rhizobia symbiosis,in their roots.Nevertheless,the relationship between the AM and rhizobial symbioses in native soil is poorly understood.Here,we examined how these distinct symbioses affect root-associated bacterial communities in Medicago truncatula by performing quantitative microbiota profiling(QMP)of 16S rRNA genes.We found that M.truncatula mutants that cannot establish AM or rhizobia symbiosis have an altered microbial load(quantitative abundance)in the rhizosphere and roots,and in particular that AM symbiosis is required to assemble a normal quantitative root-associated microbiota in native soil.Moreover,quantitative microbial co-abundance network analyses revealed that AM symbiosis affects Rhizobiales hubs among plant microbiota and benefits the plant holobiont.Through QMP of rhizobial rpoB and AM fungal SSU rRNA genes,we revealed a new layer of interaction whereby AM symbiosis promotes rhizobia accumulation in the rhizosphere of M.truncatula.We further showed that AM symbiosis-conditioned microbial communities within the M.truncatula rhizosphere could promote nodulation in different legume plants in native soil.Given that the AM and rhizobial symbioses are critical for crop growth,our findings might inform strategies to improve agricultural management.Moreover,our work sheds light on the co-evolution of these intracellular symbioses during plant adaptation to native soil conditions.Xiaolin Wang Huan Feng Yayu Wang Mingxing Wang Xingguang Xie Huizhong Chang Like Wang Jicheng Qu Kai Sun Wei He Chunyan Wang Chuanchao Dai Zhaohui Chu Changfu Tian Nan Yu Xuebin Zhang Huan Liu Ertao Wang 2021Molecular Plant2021,14,3:6
20Experimental investigation on turbulence modification in a horizontal channel flow at relatively low mass loading显示文摘在一条水平隧道的粒子沉重的流动借助于二阶段的粒子图象 velocimetry (PIV ) 被调查技术。实验在一个雷纳兹数字被执行 6 826 并且流动与二种尺寸, 60 μm 和 110 μm 的聚乙烯祷告被播种。一个人比稍微小,其它比 Kolmogorov 长度规模大。粒子装载是相对低的,与装载比率从 5 × 1 的质量 0 −4 到 4 × 1 从 6 × 1 的 0 −2 和体积部分 0 −7 到 4.8 × 1 0 −5, 分别地。结果证明粒子的存在能戏剧性地甚至在 5 × 1 的最低集体装载比率下面修改骚乱 0 −4 。吝啬的流动与增加粒子尺寸并且集体装载被稀释并且减少。骚乱紧张在担心的所有案例中被提高。随集体装载的增加,紧张在小粒子的情况中以一种复杂方式变化,显示复杂粒子骚乱相互作用;而他们在大粒子的情况中单调地增加。粒子速度和集中也被给。粒子在中心区域落后于液体,但是领进墙区域,和这个趋势为大粒子是更突出的。溪流明智的粒子变化比为粒子的两种尺寸的煤气的变化大,然而,他们有集体装载的变化趋势不是那么清楚的。墙正常变化与增加集体装载增加。他们在 60 μm 粒子盒子中是更小的但是在 110 μm 粒子盒子中更大比那些煤气的阶段。当更大的粒子被他们的自己的惯性更多半统治时,看起来,小粒子跟随液体运动到某些程度。最后,粒子集中的显著不一致的分布被观察,特别为大粒子。粒子的惯性被证明为骚乱修正和粒子行为很重要并且应该因此在水平隧道被考虑。Yi Wu Hangfeng Wang Zhaohui Liu Jing Li Liqi Zhang Chuguang Zheng 2006Acta Mechanica Sinica2006,22,2:6
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