共查询到20条相似文献，搜索用时 672 毫秒
1.
基因芯片技术在药物研究中的应用 总被引：3，自引：0，他引：3
生物芯片是由现代分子生物学技术结合微加工技术制成的具有一定生物学分析检测功能的微型器件，以DNA芯片和PCR、毛细管电泳及介电电泳为代表。九十年代以来，在人类基因组实施计划的推动下，DNA芯片技术得到了迅猛的发展，具在生命科学的研究中开始发挥作用。DNA芯片技术能够同时分析成千上万个基因或基因组，研究与疾病诊断相关的基因序列，可用于药理基因组学研究与基因重复测序工作，它在药学领域将对于药物靶标的发现、多靶位同步超高通量药物工筛选、药物作用的分子机理研究、中医药基础理论的现代化、药物活性和毒性评价等领域具有其它方法无可比拟的优势。美国Affymetrix公司已开始与Merck公司、Hoffmanlaroche公司等合作，将基因芯片技术用于新药筛选；Incyte Pharmaceuticals,Synteni,Nanogen等公司也采用基因芯片技术进行新筛选，以期从天然药物或合成物中筛选出基因相关药物。 相似文献
2.
3.
赵书红 《动物科学与动物医学》2005,22(9):22-23
基因芯片技术是分子标记技术方法之一，其将大量的基因片段有序地、高密度地排列在固相载体上，称之为基因芯片。基因芯片技术是融生物学、物理学、化学、计算机科学、微电子学为一体的新技术，是90年代中期以来最重大科技进展之一，已经广泛用于许多物种的功能基因组学研究．具有重大的研究价值及产业化前景。由于用该技术可以将极其大量的探针同时固定于支持物上．所以一次可以对大量的生物分子进行检测分析．从而解决了传统核酸印迹杂交自动化程度低．低通量等不足。而且，通过设计不同的探针阵列、使用特定的分析方法可使该技术具有多种不同的应用价值．如基因表达谱测定、突变检测。多态性分析、基因组文库作图及杂交测序（SBH）等，为”后基因组计划”时期基因功能的研究提供了强有力的工具，将会使新基因的发现．基因诊断等方面取得重大突破。 相似文献
4.
T-2毒素是由镰刀菌产生的毒性最强的霉菌毒素，广泛存在于动物饲料和贮存的谷物中。T-2毒素理化性质稳定，难以从污染的饲料和谷物中去除，被世界卫生组织列为不可避免的食品污染物，严重威胁人和动物健康。神经系统是T-2毒素攻击的靶系统之一，T-2毒素可通过破坏血脑屏障进入脑组织，诱导氧化应激，造成脑细胞氧化损伤和凋亡。论文系统地总结了T-2毒素神经毒性的研究进展，分析了T-2毒素神经毒性的分子机制及未来研究需要关注的重点和发展趋势，旨在为揭示T-2毒素神经毒性机制提供理论基础，为发掘缓解T-2毒素神经毒性靶标药物提供理论参考。 相似文献
5.
基因芯片(BiologicalChip)技术是一种大规模平行检测生物分子的有效手段,兴起于20世纪90年代初。由于其快速、微量准确的应用优点,已成为新一代的自动化医学检验工具。本文着重介绍生物芯片技术的种类、原理以及基因芯片在传染病防制中的应用。 相似文献
6.
黏杆菌素神经毒性的研究进展 总被引：2，自引：1，他引：1
系统回顾了黏菌素神经毒性的发生情况、主要症状、作用机制、神经毒性反应的危险因素以及神经毒性的预防与治疗,为期为神经毒性研究以及临床用药提供参考资料。 相似文献
7.
8.
一些高温烹饪的食品中含有丙烯酰胺(acylamide,AA)。AA主要侵害动物和人的神经系统,产生神经毒性,而引起神经系统病变。AA神经毒性的作用机制目前还不是很清楚,但目前研究主要集中在轴突退变、浦肯野细胞(Purkinie)损伤、离子作用、蛋白结合、细胞凋亡、氧化损伤等这几个方面。 相似文献
9.
随着人们对生命活动本质认识的不断深入,特别是人类基因组计划的完成,生命科学领域的研究又面临着新的挑战,即开发出能同时大规模处理生物样品和解析生物信息的新技术-基因芯片技术。在学科交叉不断深入的基础上诞生的基因芯片技术目前已成为国际上的前沿研究领域和研究热点。生物芯片是Fodor等人于1991年在著名的Science上提出来的。而基因芯片是生物芯片的一种,也是当前应用最为广泛的一种生物芯片。随着对基因芯片技术及其功能研究的不断深入,人们已经意识到基因芯片技术将对生物界乃至整个医学界的疾病诊断及治疗具有重要的意义并将产… 相似文献
10.
本研究测定了成年来航母鸡口服三甲基苯基磷酸酯引起的迟发性神经毒性症状级数。鸡脑神经毒性酯活性及其体重的变化，在为期２８ｄ的试验中，染毒鸡在给药后的第８－１０ｄ出现迟发性神经毒性症状。步态失调，站立不稳，两腿叉开，身体后坐，直至跌倒，瘫痪。 相似文献
11.
12.
Construction of a microarray specific to the chicken immune system: profiling gene expression in B cells after lipopolysaccharide stimulation 
下载免费PDF全文
下载免费PDF全文 Aimie J. Sarson Leah R. Read Hamid R. Haghighi Melissa D. Lambourne Jennifer T. Brisbin Huaijun Zhou Shayan Sharif 《Canadian journal of veterinary research》2007,71(2):108-118
The objective of this study was to profile gene expression in cells of the chicken immune system. A low-density immune-specific microarray was constructed that contained genes with known functions in the chicken immune system, in addition to chicken-expressed sequence tags (ESTs) homologous with mammalian immune system genes, which were systematically characterized by bioinformatic analyses. Genes and ESTs that met the annotation criteria were amplified and placed on a microarray. The microarray contained 84 immune system gene elements. As a means of calibration, the microarray was then used to examine gene expression in chicken B cells after lipopolysaccharide stimulation. Differential gene expression was observed at 6, 12, and 24 h but not at 48 h after stimulation. The results were validated by semiquantitative polymerase chain reaction. The microarray showed a high degree of reproducibility, as demonstrated by intra- and interassay correlation coefficients of 0.97 and 0.95, respectively. Thus, the low-density microarray developed in this study may be used as a tool for monitoring gene expression in the chicken immune system. 相似文献
13.
14.
Garneau P Labrecque O Maynard C Messier S Masson L Archambault M Harel J 《Zoonoses and public health》2010,57(Z1):94-99
As diagnostic and surveillance activities are vital to determine measures needed to control antimicrobial resistance (AMR), new and rapid laboratory methods are necessary to facilitate this important effort. DNA microarray technology allows the detection of a large number of genes in a single reaction. This technology is simple, specific and high-throughput. We have developed a bacterial antimicrobial resistance gene DNA microarray that will allow rapid antimicrobial resistance gene screening for all Gram-positive and Gram-negative bacteria. A prototype microarray was designed using a 70-mer based oligonucleotide set targeting AMR genes of Gram-negative and Gram-positive bacteria. In the present version, the microarray consists of 182 oligonucleotides corresponding to 166 different acquired AMR gene targets, covering most of the resistance genes found in both Gram-negative and -positive bacteria. A test study was performed on a collection of Staphylococcus aureus isolates from milk samples from dairy farms in Québec, Canada. The reproducibility of the hybridizations was determined, and the microarray results were compared with those obtained by phenotypic resistance tests (either MIC or Kirby-Bauer). The microarray genotyping demonstrated a correlation between penicillin, tetracycline and erythromycin resistance phenotypes with the corresponding acquired resistance genes. The hybridizations showed that the 38 antimicrobial resistant S. aureus isolates possessed at least one AMR gene. 相似文献
15.
Jung JW Park JS Hwang JW Kang KS Lee YS Song BS Lee GJ Yeo CD Kang JS Lee WS Jeon KS Um CH Kim YS Oh MJ Youn JP Li P Park JE Hwang SY 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(11):1329-1333
The recent DNA microarray technology enables us to understand a large number of gene expression profiling. The technology has potential possibility to comprehend mechanism of multiple genes were related to compounds which have toxicity in biological system. So, the toxicogenomics through this technology may be very powerful for understanding the effect of unknown toxic mechanisms in biological system. We have studied that the effect of compounds related to hepatotoxin in vivo system using DNA microarray and classified chemicals which have been well characterized. We have studied three compounds; 2 peroxisome proliferators: Clofibrate (ethyl-p-chlorophenoxyisobutyrate), gemfibrozil (5-2[2,5-dimethyl-phenoxy]2-2-dimethyl-pentanonic), and an antiepileptic drug: phenytoin (5,5-diphenylhydantoin). Male Sprague-Dawely VAF(+) albino rats of 5-6 weeks old were treated with each compound for 24 hr and 2 weeks. 4.8 K cDNA microarray in house has been used for gene expression profiling. We found that the clustering of gene expression had similarity like as the toxic phenotype of compounds. 相似文献
16.
17.
18.
Watkins C McKellar A Jensen K George A Jones D Sharp MJ Stevenson K Hopkins J 《Veterinary research communications》2008,32(8):647-657
This report describes the development of small DNA microarrays of fully defined genes suitable for projects requiring detailed
analysis of gene expression in sheep and/or cattle. Two arrays have been developed; the first is a small reference microarray
(RIGRA) that has been used to validate experimental design and methodology; the second, a larger array (RIGUA) containing
probes for 516 ruminant immuno-inflammatory genes, each represented by non-overlapping 75mer oligonucleotides. Experiments
used to validate this microarray were: (1) a comparison of gene expression profiles from sheep broncho-alveolar macrophages
before and after in vitro activation with lipopolysaccharide (LPS), using the RIGRA; (2) the differential gene expression between five in vitro unstimulated sheep keratinocyte cultures; (3) LPS/interferon γ stimulated and unstimulated blood monocytes purified from
Holstein-Friesians (Bos taurus) and Sahiwals (Bos indicus) cattle using the RIGUA. Real-time, quantitative RT-PCR was used to validate the gene expression profiles obtained with the
RIGUA microarrays. The potential for using such an immunological tool in understanding the relative gene expression corresponding
to immune-inflammatory responses of sheep and cattle is discussed.
Supplementary information for this article may be found at (login: watkins and password: PuBm7t) 相似文献
19.
公共和私有的EST计划为大量物种的基因表达研究提供了大量利用EST的机会。为了估计EST数据库中基因的表达水平，可以通过计算每一种基因在不同组织、不同发育阶段和不同条件下构建的cDNA文库中的出现次数，来获得基因表达的有关信息。这些信息水平的量与常规的Northern blots不同，可以允许不同基因之间表达水平的比较。而且当EST资料来源于不同发育阶段的cDNA文库时，还可以了解不同发育阶段的基因表达谱。由电子Northern杂交分析所获得的基因表达资料可以通过应用高密度DNA点阵得到证实并扩展于高表达基因领域之外。相关ESTS可以标定于尼龙膜或玻璃上并用相关组织的一链总cDNA作为探针进行鉴定。双色荧光标记可以得到精确的mRNA比率测定。在不远的将来，包含一种机体所有基因互补物的高密度DNA点阵将成为整个基因组范围基因表达类型分析的有效工具。 相似文献