维普中文期刊产品整合服务
356篇 您的检索式:作者名="Li ZHA"
    题名 作者 年代 出处 被引量
1Cardiomyocyte overexpression of miR-27b induces cardiac hypertrophy and dysfunction in mice显示文摘最近的研究开始在心脏的肥大和机能障碍的致病揭示了 microRNAs (miRNAs ) 的关键角色。在这研究,我们测试了是否转变生长 factor-β(TGF-β) 调整 miRNA 在心脏的肥大和心失败(HF ) 的发展起了一个枢轴的作用。我们观察到 miR-27b 是在 cardiomyocyte 特定的 Smad4 猛烈老鼠的心的 upregulated,它开发了心脏的肥大。在 vitro,实验证明 miR-27b 表示能被 TGF-β 禁止; 1 并且它的 overexpression 支持了 hypertrophic 房间生长,当 miR-27b 抑制导致了 hypertrophic 房间的抑制时,生长由 phenylephrine (PE ) 引起了处理。而且,有 miR-27b 的 cardiomyocyte 特定的 overexpression 的转基因的老鼠的分析表明 miR-27b overexpression 是足够的导致心脏的肥大和机能障碍。我们验证了 peroxisome 激活 proliferator 的 receptor-γ(PPAR-γ) 作为在 cardiomyocyte 的 miR-27b 的一个直接目标。一致地, miR-27b 转基因的老鼠显著地显示了 PPAR-γ 的底层;比控制鼠标。而且,在用在一只 pressure-overload-induced 老鼠的特定的 antagomir 的 miR-27b 的 vivo silencing, HF 的模型增加了心脏的 PPAR-γ表示,稀释心脏的肥大和机能障碍。我们的学习的结果表明那 TGF-β 1-regulated miR-27b 涉及心脏的肥大的规定,并且为心脏病作为一个有效治疗学的目标验证 miR-27b。Jian Wang Yao Song Yan Zhang Han Xiao Qiang Sun Ning Hou Shuilong Guo Youliang Wang Kaiji Fan Dawei Zhan Lagabaiyila Zha Yang Cao Zhenhua Li Xuan Cheng Youyi Zhang Xiao Yang 2012Cell Research2012,22,3:36
2Neutrophil extracellular traps mediate the crosstalk between glioma progression and the tumor microenvironment via the HMGB1/RAGE/IL-8 axis显示文摘Objective:Neutrophil extracellular traps(NETs)produced by tumor-infiltrating neutrophils(TINs)are associated with poor prognosis in patients with several types of cancer.However,the mechanisms underlying the involvement of NETs in glioma progression remain largely unknown.This study aimed to elucidate the roles of NETs in biological processes that drive the crosstalk between glioma progression and the tumor microenvironment.Methods:Neutrophil infiltration and NETs formation were investigated in glioma tissue through immunohistochemistry,and their relationships with clinicopathological features and outcomes were statistically evaluated.The effects of NETs on glioma cell progression were studied in a co-culture system.In vivo and in vitro experiments validated the reactive oxygen species activity and cytokine production of TINs,as well as the ERK signaling pathway activation and the metastasis of gliomas.Results:Neutrophil infiltration and NETs formation were induced in high-grade glioma compared with low-grade glioma.NETs induced by TINs were determined to be an oncogenic marker of high-grade gliomas and to be involved in cell proliferation and invasion.NETs overproduction promoted glioma cell proliferation,migration,and invasion.Furthermore,HMGB1 was found to bind to RAGE and activate the NF-κB signaling pathway in vitro.In addition,NETs stimulated the NF-κB signaling pathway,thus promoting IL-8 secretion in glioblastoma.Subsequently,IL-8 recruited neutrophils which in turn mediated NETs formation via the PI3 K/AKT/ROS axis in TINs.Conclusions:Our results suggest that NETs produced by TINs mediate the crosstalk between glioma progression and the tumor microenvironment by regulating the HMGB1/RAGE/IL-8 axis.Targeting NETs formation or IL-8 secretion may be an effective approach to inhibit glioma progression.Caijun Zha Xiangqi Meng Lulu Li Shan Mi Da Qian Ziwei Li Pengfei Wu Shaoshan Hu Shihong Zhao Jinquan Cai Yanhong Liu 2020Cancer Biology & Medicine2020,17,1:19
3CPG Control for Biped Hopping Robot in Unpredictable Environment显示文摘Tingting Wang Wei Guo Mantian Li Fusheng Zha Lining Sun 2012Journal of Bionic Engineering2012,9,1:17
4SEUSS and PIF4 Coordinately Regulate Light and Temperature Signaling Pathways to Control Plant Growth显示文摘Junling Huai Xinyu Zhang dialong Li Tingting Ma Ping Zha Yanjun Jing Rongcheng Lin 2018Molecular Plant2018,11,7:15
5Relationship between electrochemical characteristics and SCC of X70 pipeline steel in an acidic soil simulated solution显示文摘Stress corrosion cracking (SCC) of X70 pipeline steel in simulated solution of the acidic soil in Yingtan in China was investigated using slow strain rate test (SSRT), SEM and potentiodynamic polarization technique. Experiment results indicate that X70 steel is highly susceptible to SCC as applied potential reduces, which is manifested in loss of toughness and brittle fracture. Constant polarization current can detect the occurrence of SCC. The lower the polarization current is the sooner stress corrosion cracking occurs. The SCC mechanisms are different at varying potentials. When potential is higher than open circuit potential, anodic process controls SCC, whereas when potential is far lower than open circuit potential, cathodic process controls SCC, and between these two potential regions, a combined electrochemical process controls the SCC. Stress or strain has a synergistic effect with electrochemical reactions to accelerate the cathodic hydrogen evolution process, which makes the X70 pipeline steel to be more susceptible to SCC.Zhiyong LIU Xiaogang LI Yingrui ZHANG Cuiwei DU Guoli ZHA 2009Acta Metallurgica Sinica(English Letters)2009,22,1:13
6Radial profile of sap flow velocity in mature Xinjiang poplar(Populus alba L. var. pyramidalis) in Northwest China显示文摘Estimation of the transpiration rate for a tree is generally based on sap flow measurements within the hydro-active stem xylem. In this study, radial variation of sap flow velocity(Js) was investigated at five depths of the xylem(1, 2, 3, 5 and 8 cm under the cambium) in three mature Xinjiang poplar(Populus alba L. var. pyramidalis) trees grown at the Gansu Minqin National Studies Station for Desert Steppe Ecosystem from May to October 2011. Thermal dissipation probes of various lengths manufactured according to the Granier's design were installed into each tree for simultaneous observation of the radial patterns of Js through the xylem. The radial patterns were found to fit the four-parameter GaussAmp equation. The peak Js was about 27.02±0.95 kg/(dm2?d) at approximately 3 to 5 cm deep from the cambium of the three trees,and the lowest Js appeared at 1 cm deep in most of the time. Approximately 50% of the total sap flow in Xinjiang poplar occurred within one-third of the xylem from its outer radius, whereas 90% of the total sap flow occurred within two-fifth of the xylem. In addition, the innermost point of the xylem(at 8-cm depth), which appeared as the penultimate sap flow in most cases during the study period, was hydro-active with Js,8 of 7.55±3.83 kg/(dm2?d). The radial pattern of Js was found to be steeper in midday than in other time of the day, and steeper diurnal fluctuations were recorded in June, July and August(the mid-growing season). Maximum differences between the lowest Js(Js,1 or Js,8) and the highest Js(Js,3 or Js,5) from May through October were 12.41, 17.35, 16.30, 18.52, 12.60 and 16.04 g/(cm2?h), respectively. The time-dependent changes of Js along the radial profile(except at 1-cm depth) were strongly related to the reference evapotranspiration(ET0). Due to significant radial variability of Js, the mean daily sap flow at the whole-tree level could be over-estimated by up to 29.69% when only a single probe at depth of 2 cm was used. However, the accuracy of the estimation of sap flow in Xinjiang poplar could be significantly improved using a correction coefficient of 0.885.HongZhong DANG TianShan ZHA JinSong ZHANG Wei LI ShiZeng LIU 2014Journal of Arid Land2014,6,5:11
7The SWi2/SNF2 Chromatin-Remodeling ATPase BRAHMA Regulates Chlorophyll Biosynthesis in Arabidopsis显示文摘叶绿素生合成在植物为叶绿体开发和光合作用是批评的。尽管在叶绿素 biosynthetic 小径的反应大部分被知道了,很少对这条小径的规章的机制被知道。在这研究,我们发现象梵天(BRM ) 的 RNA 干扰转基因的幼苗一样的黑暗成年的猛烈、击倒的异种,它编码 SWI2/SNF2 改变染色质的 ATPase,有的更高的 greening 率,积累的更少 protochlorophyllide,和生产更少比 Arabidopsis,野类型的植物在轻暴露之上做了的反应的氧种类。NADPH:protochlorophyllide oxidoreductase A (PORA ) 的表示, PORB,和 PORC,在叶绿素生合成催化关键步,在 brm 异种被增加。我们发现那 BRM 身体上与 bHLH 抄写因素交往 PHYTOCHROME 因素 1 交往了(PIF1 ) 通过它的 N 终端领域。而且,我们证明 BRM 直接被招募到 PORC,然而并非 PORA 和 PORB 的 cis 规章的区域,至少,部分,以一种 PIF1 依赖的方式和 histone H3 离氨酸的水平,在 PORC loci 的 4 tri-methylation (H3K4me3 ) 在 brm 异种被增加。一起拿,我们的数据显示改变染色质的酶 BRM 通过与 PIF1 交往调制 PORC 表示,提供植物在转变期间由调整叶绿素生合成从的新奇规章的机制对自造营养物质的生长不是自养。Dong Zhang Yuhong Li Xinyu Zhang Ping Zha Rongcheng Lin 2017Molecular Plant2017,10,1:10
8Genome-wide Dissection of Co-selected UV-B Responsive Pathways in the UV-B Adaptation of Qingke显示文摘Qingke (Tibetan hulless barley) has long been cultivated and exposed to long-term and strong UV-B radiation on the Tibetan Plateau, which renders it an ideal species for elucidating novel UV-B responsive mechanisms in plants. Here we report a comprehensive metabolite profiling and metabolite-based genome-wide association study (mGWAS) using 196 diverse qingke and barley accessions. Our results demonstrated both constitutive and induced accumulation, and common genetic regulation, of metabolites from different branches of the phenylpropanoid pathway that are involved in UV-B protection. A total of 90 significant mGWAS loci for these metabolites were identified in barley-qingke differentiation regions, and a number of high-level metabolite trait alleles were found to be significantly enriched in qingke, suggesting co-selection of various phenylpropanoids. Upon dissecting the entire phenylpropanoid pathway, we identified some key determinants controlling natural variation of phenylpropanoid content, including three novel proteins, a flavone C-pentosyltransferase, a tyramine hydroxycinnamoyl acyltransferase, and a MYB transcription factor. Our study, furthermore, demonstrated co-selection of both constitutive and induced phenylpropanoids for UV-B protection in qingke.Xingquan Zeng Hongjun Yuan Xuekui Dong Meng Peng Xinyu Jing Qijun Xu Tang Tang Yulin Wang Sang Zha Meng Gao Congzhi Li Chujin Shu Zexiu Wei Wangmu Qimei Yuzhen Basang Jiabu Dunzhu Zeqing Li Lijun Bai Jian Shi Zhigang Zheng Sibin Yu Alisdair R.Fernie Jie Luo Tashi Nyima 2020Molecular Plant2020,13,1:9
9Down-regulation of PTEN expression due to loss of promoter activity in human hepatocellular carcinoma cell lines显示文摘AIM: To investigate the regulation of phosphatase and tensin homolog deleted on chromosome ten (PTEN) gene expression in human hepatocellular carcinoma (HCC) cell lines.METHODS: The mRNA and protein levels of PTEN were detected by Northern blot and Western blot in HCC cell lines, respectively. Plasmids containing different fragments of PTEN promoter with Luciferase reporter were constructed and transiently transfected into HCC cell lines to study the promoter activity. DNA analysis and RT-PCR were performed to detect the mutation of PTEN promoter and PTEN cDNA.RESULTS: Either protein or mRNA levels of PTEN in L02 cells (as a control) were significantly higher than that in HCC cell lines. The profile of PTEN promoter activity in 8 cell lines was closely correlated with levels of PTEN mRNA and PTEN protein. Furthermore, the sequence analysis of 8 cells lines showed no mutation in the region of PTEN promoter and PTENcDNA.CONCLUSION: PTEN expression is down-regulated in HCC cell lines probably due to loss of activity of PTEN promoter.Dong-Zhu Ma Zhen Xu Yu-Long Liang Jian-Ming Su Zeng-Xia Li Wen Zhang Li-Ying Wang Xi-Liang Zha 2005World Journal of Gastroenterology2005,11,29:8
10Prevention of lipopolysaccharide-induced injury by 3,5-dicaffeoylquinic acid in endothelial cells显示文摘目的: onlipopolysaccharide ( LPS )在人的真皮的微脉管的 endothelialcells ( HMEC-1 )导致了损害调查 3,5-dicaffeoylquinic 酸( 3,5-diCQA )的效果 .Methods :抗氧化剂效果用 malondialdehyde ( MDA )被检测在类脂化合物 peroxidation.Cell 生存能力的一个老鼠肝微体模型的试金用the3-被分析( 4,5-dimethylthiazol-2-yl ) -2,5 diphenyltetrazolium 溴化物试金。房间类脂化合物过氧化物损害被测量由喂奶脱氢酶( LDH ) release.Apoptotic 房间被流动 cytometry 检测,并且由 DNA 破碎 analysis.Caspase-3 证实活动用细胞内部的反应的氧种类( ROS )的特定的 assaykit.The 水平被测量被流动 cytometry 与 a2,7-dichlorodihydro-fluorescein diacetate 荧光 probe.Results 决定:微体toascorbate-Fe^(2+)的暴露根据 MDA.MDAformation 的水平的增加导致了 lipoperoxidation 减少了在一有 5,10 的处理上的剂量依赖者举止,或有为 16 h 的 LPS 的 50 亩 mol/L3,5-diCQA.Treatment 从47.6%~61.5% .DNA laddering 在在 LDH 版本的房间生存能力和增加导致了60%减少被 apoptotic 房间的统帅玫瑰胶化 electrophoresis.Thelevel 观察为 12 h.Following 与 LPS 在处理以后在27%点达到顶点为 12 的处理 withLPS h ,有 3,5-diCQA at5,10 的细胞内部的 ROS 和 caspase-3 活动increased.Pre处理,或为 1 h 的 50 亩 mol/L 稀释了 调停LPS 的 endothelial 房间损害。3,5-diCQA 的 anti-apoptoticaction 由于 caspase-3activity 的 LPS,和抑制导致的细胞内部的 ROS 清除部分依赖于它为反氧化和抗氧化的 caspase-3 activity.Conclusion:3,5-diCQA 显示和 anti-apoptotic 活动 inHMEC-1 的抑制的能力。Ruo-peng ZHA Wei XU Wen-yi WANG Li DONG Yi-ping WANG 2007Acta Pharmacologica Sinica2007,28,8:8
11Sedimentary fill history of the Huicheng Basin in the West Qinling Mountains and associated constraints on Mesozoic intracontinental tectonic evolution显示文摘The Qinling Orogenic Belt is divided commonly by the Fengxian-Taibai strike-slip shear zone and the Huicheng Basin into the East and West Qinling mountains,which show significant geological differences after the Indosinian orogeny.The Fengxian-Taibai fault zone and the Meso-Cenozoic Huicheng Basin,situated at the boundary of the East and West Qinling,provide a natural laboratory for tectonic analysis and sedimentological study of intracontinental tectonic evolution of the Qinling Orogenic Belt.In order to explain the dynamic development of the Huicheng Basin and elucidate its post-orogenic tectonic evolution at the junction of the East and West Qinling,we studied the geometry and kinematics of fault zones between the blocks of West Qinling,as well as the sedimentary fill history of the Huicheng Basin.First,we found that after the collisional orogeny in the Late Triassic,post-orogenic extensional collapse occurred in the Early and Middle Jurassic within the Qinling Orogenic Belt,resulting in a series of rift basins.Second,in the Late Jurassic and Early Cretaceous,a NE-SW compressive stress field caused large-scale sinistral strike-slip faults in the Qinling Orogenic Belt,causing intracontinental escape tectonics at the junction of the East and West Qinling,including eastward finite escape of the East Qinling micro-plate and southwest lateral escape of the Bikou Terrane.Meanwhile,the strike-slip-related Early Cretaceous sedimentary basin was formed with a right-order echelon arrangement in sinistral shear zones along the southern margin of the Huicheng fault.Overall during the Mesozoic,the Huicheng Basin and surrounding areas experienced four tectonic evolutionary stages,including extensional rift basin development in the Early and Middle Jurassic,intense compressive uplift in the Late Jurassic,formation of a strike-slip extensional basin in the Early Cretaceous,and compressive uplift in the Late Cretaceous.LI Wei DONG YunPeng GUO AnLin LIU XiaoMing LIU YiQun ZHA XianFeng ZHANG KuaiLe 2013Science China Earth Sciences2013,56,10:7
12Novel Recombinant Seneca Valley Virus Isolated from Slaughtered Pigs in Guangdong Province显示文摘Dear Editor,Since the first outbreak in Brazil in 2015,Seneca Valley virus(SVV)associated with porcine idiopathic vesicular disease,has shown increasing geographic distribution.Cases of SVV have been reported from several countries including the United States(US),Colombia,Thailand,Canada,and China(Pasma et al.2008;Zhang et al.2015;Sun et al.2017;Wu et al.2017;Liu et al.2018;Saeng-Chuto et al.2018).SVV was first identified in the US in 2002 and is the only member of the genus Senecavirus in the family Picomaviridae(Hales et al.2008;Leme et al.2017).The SVV genome contains a large open reading frame(ORF)encoding a polyprotein,which is cleaved into various mature viral proteins including the leader protein(L),structural proteins(VP1,VP2,VP3,and VP4),and non-structural proteins(2A,2B,2C,3A,3B,3C,and 3D)(Hales et al 2008).Structural proteins bind to their receptor,anthrax toxin receptor 1,to mediate viral invasion and stimulate specific immunity of the host(Jayawardena et al.2018).Non-structural proteins such as 3C suppress innate immune responses by degrading interferon regulatory factor 3(IRF 3)and IRF7 and inhibit the activation of RIG-1,TBK1,and TRAF3 through deubiquitination(Xue et al 2018).Jianxin Liu Yunfeng Zha Huizi Li Yanwei Sun Fuguang Wang Rong Lu Zhangyong Ning 2019Virologica Sinica2019,34,6:7
13Genetic Analysis and Mapping of TWH Gene in Rice Twisted Hull Mutant显示文摘A mutant with twisted hulls was found in a breeding population of rice (Oryza sativa L.). The mutant shows less grain weight and inferior grain quality in addition to twisted hulls. Genetic analysis indicated that the phenotype of mutant was controlled by a single recessive gene (temporarily designated as TWH). To map the TWH gene, an F2 population was generated by crossing the twh mutant to R725, an indica rice variety with normal hulls. For bulked segregant analysis, the bulk of mutant plants was prepared by mixing equal amount of plant tissue from 10 twisted-hull plants and the bulk of normal plants was obtained by pooling equal amount tissue of 10 normal-hull plants. Two hundred and seven pairs of simple sequence repeat (SSR) primers, which are distributed on 12 rice chromosomes, were used for polymorphism analysis of the parents and the two bulks. The TWH locus was initially mapped close to the SSR marker RM526 on chromosome 2. Therefore, further mapping was performed using 50 pairs of SSR primers around the marker RM526. The TWH was delimited between the SSR markers RM14128 and RM208 on the long arm of chromosome 2 at the genetic distances of 1.4 cM and 2.7 cM, respectively. These results provide the foundation for further fine mapping, cloning and functional analysis of the TWH gene.LI Jin-bo XIA Ming-yuan WAN Bing-liang DU Xue-shu ZHA Zhong-ping Yu Da-zhao QI Hua-xiong 2009Rice science2009,16,1:6
14Berberine Attenuates Cigarette Smoke Extract-induced Airway Inflammation in Mice:Involvement of TGF-β1/Smads Signaling Pathway显示文摘Although several studies confirmed that berberine may attenuate airway inflammation in mice with chronic obstructive pulmonary disease(COPD),its underlying mechanisms were not clear until now.We aimed to establish an experiment mouse model for COPD and to investigate the effects of berberine on airway inflammation and its possible mechanism in COPD model mice induced by cigarette smoke extract(CSE).Twenty SPF C57BL/6 mice were randomly divided into PBS control group,COPD model group,low-dose berberine group and high-dose berberine group,5 mice in each group.The neutrophils and macrophages were examined by Wright's staining.The levels of inflammatory cytokines TNF-α and IL-6 in bronchoalveolar lavage fluid(BALF)were detennined by enzyme-linked immunosorbent assay.The expression levels of TGF-β1,Smad2 and Smad3 mRNA and proteins in lung tissues were respectively detected by quantitative real-time polymerase chain reaction and Western blotting.It was found that CSE increased the number of inflammation cells in BALF,elevated lung inflammation scores,and enhanced the TGF-β1/Smads signaling activity in mice.High-dose berberine restrained the alterations in the COPD mice induced by CSE.It was concluded that high-dose berberine ameliorated CSE-induced airway inflammation in COPD mice.TGF-β1/Smads signaling pathway might be involved in the mechanism.These findings suggested a therapeutic potential of high-dose berberine on the CSE-induced airway inflammation.Wen WANG Gan ZHA Jin-jing ZOU Xun WANG Chun-nian LI Xiao-jun WU 2019Current Medical Science2019,39,5:6
15Tailoring bimodal grain structure of Mg-9Al-1Zn alloy for strength-ductility synergy:Co-regulating effect from coarse Al_(2)Y and submicron Mg_(17)Al_(12) particles显示文摘Grain boundary strengthening is an effective strategy for increasing mechanical properties of Mg alloys.However,this method offers limited strengthening in bimodal grain-structured Mg alloys due to the difficultly in increasing the volume fraction of fine grains while keeping a small grain size.Herein,we show that the volume fraction of fine grains(FGs,~2.5μm)in the bimodal grain structure can be tailored from~30 vol.%in Mg-9 Al-1 Zn(AZ91)to~52 vol.%in AZ91-1Y(wt.%)processed by hard plate rolling(HPR).Moreover,a superior combination of a high ultimate tensile strength(~405 MPa)and decent uniform elongation(~9%)is achieved in present AZ91-1Y alloy.It reveals that a desired bimodal grain structure can be tailored by the co-regulating effect from coarse Al_(2)Y particles resulting in inhomogeneous recrystallization,and dispersed submicron Mg_(17)Al_(12)particles depressing the growth of recrystallized grains.The findings offer a valuable insight in tailoring bimodal grain-structured Mg alloys for optimized strength and ductility.Yong-Kang Li Min Zha Hai-Long Jia Si-Qing Wang Hongmin Zhang Xiao Ma Teng Tian Pinkui Ma Hui-Yuan Wang 2021Journal of Magnesium and Alloys2021,9,5:6
16OxLDL up-regulates Niemann-Pick type C1 expression through ERK1/2/COX-2/ PPARα-signaling pathway in macrophages显示文摘NiemannPick 类型 C1 (NPC1 ) 主要位于迟了的 endosome/lysosome 的膜并且从迟了的 endosome/lysosome 控制细胞内部的胆固醇 trafficking 到血浆膜。它被报导了那氧化低密度的脂蛋白(oxLDL ) 罐头起来调整 NPC1 表情。然而,详细机制充分没被理解。在这研究,我们在 THP-1 巨噬细胞在 NPC1 表示上调查了 oxLDL 刺激的效果。我们的结果显示出在 mRNA 和蛋白质的起来调整的 NPC1 表示在一个剂量依赖者和时间依赖者举止铺平的那 oxLDL。另外, oxLDL 也导致了细胞外的调整信号的 kinase 1/2 (ERK1/2 ) 的 phosphorylation。有 oxLDL 的处理显著地在巨噬细胞增加了 cyclooxygenase-2 (COX-2 ) mRNA 和蛋白质表示,并且这些增加被 ERK1/2 禁止者 PD98059 或 ERK1/2 压制小介入 RNA (siRNA ) 处理。OxLDL 起来调整在 mRNA 和蛋白质的激活 proliferator 的受体(PPAR ) 铺平的 peroxisome 的表示,它能被 COX-2 siRNA 或 COX-2 禁止者 NS398 处理在这些巨噬细胞废除。OxLDL 戏剧性地提高了细胞的胆固醇流出,它被禁止 ERK1/2 或 COX-2 废除。另外,导致 oxLDL 的 NPC1 表示和细胞的胆固醇流出被 PPAR siRNA 或 GW6471 颠倒, PPAR 的一个对手。一起拿,这些结果提供证据那 oxLDL 罐头起来调整通过在巨噬细胞的 ERK1/2/COX-2/PPAR-signaling 小径的 NPC1 的表示。Xiaohua Yu Xiaoxu Li Guojun Zhao Ji Xiao Zhongcheng Mo Kai Yin Zhisheng Jiang Yuchang Fu Xiaohui Zha Chaoke Tang 2012Acta Biochimica et Biophysica Sinica2012,44,2:6
17Policy iteration based Q-learning for linear nonzero-sum quadratic differential games显示文摘In this paper, a policy iteration-based Q-learning algorithm is proposed to solve infinite horizon linear nonzero-sum quadratic differential games with completely unknown dynamics. The Q-learning algorithm, which employs off-policy reinforcement learning(RL), can learn the Nash equilibrium and the corresponding value functions online, using the data sets generated by behavior policies. First, we prove equivalence between the proposed off-policy Q-learning algorithm and an offline PI algorithm by selecting specific initially admissible polices that can be learned online. Then, the convergence of the off-policy Qlearning algorithm is proved under a mild rank condition that can be easily met by injecting appropriate probing noises into behavior policies. The generated data sets can be repeatedly used during the learning process, which is computationally effective. The simulation results demonstrate the effectiveness of the proposed Q-learning algorithm.Xinxing LI Zhihong PENG Li LIANG Wenzhong ZHA 2019Science China(Information Sciences)2019,62,5:6
18Pitavastatin attenuates AGEs-induced mitophagy via inhibition of ROS generation in the mitochondria of cardiomyocytes显示文摘This study aimed to investigate whether pitavastatin protected against injury induced by advanced glycation end products products(AGEs) in neonatal rat cardiomyocytes,and to examine the underlying mechanisms.Cardiomyocytes of neonatal rats were incubated for 48 hours with AGEs(100 μg/mL),receptor for advanced glycation end products(RAGE),antibody(1 μg/mL) and pitavastatin(600 ng/mL).The levels of p62 and beclinl were determined by Western blotting.Mitochondrial membrane potential(△Ψm) and the generation of reactive oxygen species(ROS) were measured through the JC-1 and DCFH-DA.In the AGEs group,the expression of beclinl was remarkably increased compared to the control group,while the expression of p62 was significantly decreased.AGEs also markedly decreased △Ψm and significantly increased ROS compared with the control group.After treatment with RAGE antibody or pitavastatin,the level of beclinl was markedly decreased compared with the AGEs group,but the level of p62 was remarkably increased.In the AGEs + RAGE antibody group and AGEs+ pitavastatin group,△Ψm was significantly increased and ROS was remarkably decreased compared with the AGEs group.In conclusion,AGEs-RAGE may induce autophagy of cardiomyocytes by generation of ROS and pitavastatin could protect against AGEs-induced injury against cardiomyocytes.Zhimin Zha Junhong Wang Shiling Li Yan Guo 2018The Journal of Biomedical Research2018,32,4:6
19A Model for Estimating Total Forest Coverage with Ground-Based Digital Photography显示文摘Vegetation fractional coverage (VFC) is one of the key indicators of vegetation distribution. In the work a measurement-based model was developed to derive total forest VFC (TG) as well as the VFC of trees (T) and shrub-grasses (G) separately in a subtropical forest area in Nanjing, China. Both upward and downward photographs were taken with a digital camera in 72 quadrats (10 m × 10 m each). Fifteen models were established and validated. Models jointly using both T and G performed better than those using the T and G separately. The best model, TG = T + G- 1.134 × T × G- 0.025 (R2 = 0.9115, P < 0.01, root mean squared error = 0.0789), is recommended for application. This model provides a good way to obtain total forest VFC values through taking tree and shrub-grass photos on ground below tree canopy rather than above tree canopy.GU Zhu-Jun ZENG Zhi-Yuan SHI Xue-Zheng LI Lin D. C. WEINDORF ZHA Yong YU Dong-Sheng LIU YongoMei 2010Pedosphere2010,20,3:5
20Emplacement Mechanism of the Akebasitao Pluton:Implications for Regional Tectonic Evolution of West Junggar,NW China显示文摘Late Carboniferous to Early Permian A-type granites are extensively distributed throughout the West Junggar region,NW China,and the Akebasitao pluton is extremely distinguished among these plutons.In this paper,we reported new anisotropy of magnetic susceptible(AMS) data combine with detailed field study and audio magnetotelluric(AMT) sounding to assess the three-dimensional shape and magmatic emplacement mechanism of the Akebasitao pluton.The geological features and the AMT sounding indicate that the pluton had a slightly oblique movement of magma from northwest to southeast,which was most likely to correspond to an asymmetrical torch with a laccolith-shaped upper part,and a lower part formed by sub-vertical 'root' that was located within its northwestern part,probably controlled by the NE-trending Anqi fault.The AMS fabrics of aU the specimens reveal a low P_j value(mean of 1.02) and a low T value(mean of-0.024),suggesting that the deformation of the AMS ellipsoid is relatively weak.The specimens exhibit both oblate and prolate shapes of the AMS ellipsoid.Magnetic lineations and foliations are randomly distributed throughout the pluton without any preferred orientation.These AMS patterns indicate that the pluton formed in a relatively stable structural environment with no regional extrusion.Therefore,we propose a complex emplacement process in which the magmas reached the shallower crust levels via deep-faults and subsequently occupied the room created by doming,accompanied by sloping near the pluton roof.Additionally,the regional tectonic setting was relatively stable during the emplacement of the Akebasitao pluton,indicating the termination of compressional orogeny during the late Late Carboniferous in the West Junggar region.This conclusion perfectly coincides with the regional tectonic paleogeography,magmatic system,and paleostress field.ZHANG Pan WANG Guocan LI Yongtao ZHANG Shengye PENG Chao ZHAO Hongwei ZHA Yanhong 2017Acta Geologica Sinica(English Edition)2017,91,3:5
返回顶部 每页显示:
共18页 首页 上一页 第1页 下一页 末页 /18 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费