Results 51 to 60 of about 209,042 (243)

A Study on Roles of Slit2 in Hepatocellular Carcinoma Cells [PDF]

open access: yes, 2015
Slit家族蛋白是一种进化上高度保守的细胞外分泌糖蛋白。对Slit的研究最初的重点是它在神经生长的作用,Slit作为配体通过与跨膜受体Roundabout(Robo)结合在中枢神经系统轴突导向中起到重要的作用。近些年的研究发现Slits与Robos在一些肿瘤中异常表达,说明Slit/Robo信号在肿瘤的发生发展过程中起到重要的作用。 Oncomine数据库的检索结果显示,与正常组织相比,肝细胞癌中受体Robo1的表达量有显著的增加,而Slit2的表达量则有一定的差别,多数情况下表现为下调 ...
朱韦林
core  

Electronic Modulation of Cu Sites via Iron Incorporation in Cu5FeS4 Bimetallic Sulfide for High‐Efficiency Oxygen Reduction Reaction

open access: yesRare Metals, EarlyView.
ABSTRACT The sluggish kinetics of the oxygen reduction reaction (ORR) necessitate developing oxygen electrodes with enhanced electrocatalytic activity for practical zinc–air battery applications. In this study, an iron‐doped copper sulfide electrocatalyst (CuFeNS‐PNC) anchored on metal–organic framework‐derived carbon substrates was designed, featuring
Taichong Chitboonyakasem   +4 more
wiley   +1 more source

β-catenin和MMP-2在非小细胞肺癌中的表达及意义

open access: yesZhongguo shiyan zhenduanxue, 2013
目的探讨β连环素(β-catenin)和MMP-2在非小细胞肺癌中的表达及意义。方法采用免疫组织化学方法检测39例肺癌组织及8例正常对照肺组织中β-catenin和MMP-2的表达,并结合临床和病理资料进行分析。结果 1.β-catenin和MMP-2在非小细胞肺癌组织中的胞质表达明显高于对照组,差异具有显著性 ...
孔康宝, 李光虎, 杨波, 崔永生
doaj  

Transgenic overexpression of miR-466a significantly disturbs OREBP/NFAT5 renal expression and induces phenotypes that resemble diabetes insipidus in human [PDF]

open access: yes, 2012
目的miR-466(a/b/c/e)-5p/3pmiRNAs是两组高度保守的miRNAs,其中-5p组间和-3p组间miRNAs的序列几乎完全一样。生物信息学分析和我们的前期研究显示,miR-466miRNAs可能可以在肾组织中对渗透应激调控转录因子OREBP/NFAT5进行转录后表达调控。我们因此希望研究miR-466a在转基因小鼠中的过表达对小鼠肾组织OREBP/NFAT5的表达和小鼠尿液浓缩机制的影响。 方法通过PCR从小鼠基因组中扩增miR-466a基因序列,将片段插入鸡 ...
刘颖
core  

Cu‐Enhanced Medium‐Entropy TiZrCoCrMo Alloys: Balancing Superior Antibacterial and Osteogenic Properties for Orthopedic Implants

open access: yesRare Metals, EarlyView.
ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu   +9 more
wiley   +1 more source

Survivin和Caspas3在侧向发育型大肠肿瘤中的表达

open access: yesZhongguo shiyan zhenduanxue, 2011
目的研究凋亡相关基因Survivin和Caspase3蛋白在侧向发育型大肠肿瘤(LST)中的表达。方法应用免疫组织化学方法检测良性LST、大肠腺瘤、大肠腺癌及其正常黏膜组织中Survivin和Caspase3的蛋白表达。结果 Sur-vivin在大肠腺癌(61.9%)高表达,良性LST(21.7%)和大肠腺瘤(20.6%)表达降低,而在正常黏膜组织不表达。Cas-pase3在正常黏膜高表达(90.9%),在良性LST(60.9%)和大肠腺瘤(64.7%)表达降低,在大肠腺癌(42.9%)低表达 ...
吴晓冬   +5 more
doaj  

Effects of ApoE Isoforms Expression on Brain ApoE Lipidation and Amyloid-β Accumulation [PDF]

open access: yes, 2015
在编码人三种不同apoE蛋白亚型(E2、E3和E4)的APOE等位基因(ε2、ε3和ε4)中,APOEε4等位基因是阿尔茨海默病(Alzheimer’sdisease,AD)最重要的遗传风险因子,APOEε2等位基因则具有保护作用。鉴于apoE蛋白亚型对基于调节apoE蛋白表达的AD治疗可能会有不同的影响,我们通过在人APOE基因定位替换(Targetedreplacement,TR)小鼠脑中过表达不同的人apoE亚型,研究脑中表达不同apoE亚型对apoE脂化和β-淀粉样蛋白(Amyloid-β,Aβ)
胡进
core  

Electronic Modulation of CoNi Nanoparticles by N‐Doped Carbon for Efficient Lignin Hydrogenolysis to Aromatic Monomers

open access: yesRare Metals, EarlyView.
ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo   +3 more
wiley   +1 more source

生存素和血管生成素2的表达在乳腺癌淋巴转移中的作用

open access: yesZhongguo shiyan zhenduanxue, 2012
目的探讨Survivin和Ang2在人乳腺癌组织中的表达及其在淋巴转移中的作用。方法2060例乳腺癌组织,应用免疫组织化学S-P法检测Survivin和Ang2在乳腺癌组织中的表达情况,RT-PCR检测Survivin及VEGF-CmRNA的表达。结果2060例乳腺癌组织中Survivin和Ang2的表达阳性率分别为85.0%和73.3%,Survivin阳性表达组中Ang2的表达为74.5%(35/51),Survivin阴性表达组中Ang2的表达为66.7%(6/9),经直线相关分析 ...
李湘奇
doaj  

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