Results 41 to 50 of about 12,974 (167)

Injectable Biomimetic Composite Hydrogel Scaffold With Tissue‐Engineered Cartilage Matrix for Articular Cartilage Regeneration

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Articular cartilage regeneration remains a significant challenge because of its limited intrinsic healing capacity and the inadequacy of conventional treatments for restoring structural and functional integrity. In this study, a novel injectable composite hydrogel scaffold was designed to mimic the extracellular matrix (ECM) of native ...
Zhong‐Lian Wu   +13 more
wiley   +1 more source

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  

Realizing the Enhanced Electromagnetic Wave Absorption and Self‐Cleaning Pollution in BaFe12O19 Composite

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT With increasing complex requirement in organic pollution environment, the development of actual electromagnetic wave (EMW) absorbers with high EMW absorption performance and self‐cleaning pollution function is becoming a significant challenge.
Shou‐Hang Lv   +8 more
wiley   +1 more source

Nutritional and Physiological Markers Are Mediated by Seasonality and Forest Access in Captive Coquerel's Sifakas 圈养科氏冕狐猴 (Coquerel's Sifakas) 的营养和生理指标受季节性和森林通道的影响

open access: yesIntegrative Conservation, Volume 4, Issue 4, Page 652-664, December 2025.
We profiled nutritional and physiological markers in captive sifakas, endangered primates from Madagascar, managed in expansive, non‐native forest enclosures. Variation in many markers reflects freely foraged diets and the energy required to maintain homeostasis under more naturalistic conditions.
Lydia K. Greene   +5 more
wiley   +1 more source

NSCLC组织中MGMT过甲基化状况与临床病理特征的关系探讨

open access: yesZhongguo shiyan zhenduanxue, 2011
目的探讨非小细胞肺癌(NSCLC)组织中DNA修复酶O6-甲基鸟嘌呤-DNA甲基转移酶(MGMT)过甲基化状况与临床病理特征的关系。方法以2006年3月到2009年7月在河南省胸科医院胸外科手术治疗的77例NSCLC患者作为研究对象,另外选取20例肺良性病变患者作为对照组,采用甲基化特异性PCR(MSP)检测两组病例肺部病变组织中MGMT的甲基化状况。结果研究组有26例出现MGMT基因甲基化,发生率为33.8%,对照组无1例出现MGMT基因甲基化,组间比较差异有统计学意义 ...
亢春彦   +4 more
doaj  

Study of N-Phosphorylation on Peptide and Protein-- Preparation of Phosphoramidate and Application of anti-Phosphoarginine Antibody [PDF]

open access: yes, 2016
蛋白质有诸多翻译后修饰(post-translationalmodifications,PTMs),包括甲基化、泛素化、乙酰化和磷酸化等等。其中,磷酸化修饰被认为是调控蛋白质功能的重要“开关”,是细胞内信号转导的关键机制,与人类多种疾病的发生密切相关。目前,天然蛋白质中共发现有9种氨基酸可以被磷酸化,其中包括以P-O键连接的磷酸酯类修饰,如磷酸化丝氨酸、苏氨酸和酪氨酸;以P-N键连接的磷酰胺类修饰,如磷酸化组氨酸、精氨酸和赖氨酸;酰基酸化是通过天冬氨酸或谷氨酸的磷酸化形成的,而S ...
孙影
core  

Seasonality of temperature dependence of methane fluxes from natural wetlands

open access: yesFunctional Ecology, Volume 39, Issue 9, Page 2383-2397, September 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Temperature dependence is a crucial parameter in estimating methane (CH4) fluxes from natural wetlands, yet our understanding of this parameter remains inadequate. Seasonal fluctuations in water levels and ecosystem productivity lead to seasonal differences in CH4 ...
Jinshuai Li   +6 more
wiley   +1 more source

复发转移性乳腺癌患者外周血BRCA1、CDH1、DKK1和SFRP1甲基化检测意义的研究

open access: yesZhongguo shiyan zhenduanxue, 2011
目的探讨BRCA1、CDH1、DKK1和SFRP1基因甲基化与乳腺癌患者肿瘤激素受体状态、复发转移的关系。方法利用甲基化特异性PCR法(MSP)检测115例复发转移乳腺癌患者外周血BRCA1、CDH1、DKK1和SFRP1的甲基化情况,与65例健康对照组进行比较。结果 BRCA1、CDH1和SFRP1的甲基化状态在复发转移乳腺癌患者与对照组之间存在差异。ER阳性患者外周血CDH1甲基化阳性率27.5%,ER阴性患者47.8%。ER阳性患者外周血SFRP1甲基化阳性率52.2%,ER阴性患者23.8 ...
卢元丽   +5 more
doaj  

胶质母细胞瘤患者MGMT基因启动子甲基化检测与分析

open access: yesZhongguo shiyan zhenduanxue, 2023
胶质母细胞瘤(GMB)属于胶质瘤中恶性程度最高的类型,临床上通常以手术切除为主,辅以放、化疗等综合治疗,但患者的预后较差,死亡率较高。因此,探索治疗GMB的有效方法是当前医疗工作者的研究重点[1]。有研究发现[2-3],MGMT(O6-甲基鸟嘌呤-DNA甲基转移酶)基因启动子甲基化的患者对烷化剂药物反应较好,预后优于非甲基化的患者,且DNA异常甲基化还可作为预防肿瘤转移、复发等分子标记物对肿瘤患者的预后效果进行评估。
施克青   +5 more
doaj  

Protein Kinase D3 Is Essential for Prostratin-stimulated Integrated HIV-1 Transcription activation via NF- κB Signaling Pathway [PDF]

open access: yes, 2016
Prostratin,一种非肿瘤促进性的佛波酯,能够通过激活HIV-1病毒转录来清除潜伏期的HIV-1病毒,但其分子机制还不是很清楚。本文,我们发现PKD3对于Prostratin激活HIV-1病毒转录是必需的。 首先,敲除PKD3能够阻断Prostratin对HIV-1病毒的转录激活,而敲除PKD家族的其他成员则不能。而且过表达持续活性的PKD3,而非野生型或没有催化活性的PKD3,能增强HIV-1病毒转录水平。于此同时 ...
胡向明
core  

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