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Hybrid Multi-Mode Reader

协同H1多模式读取器

Company: BioTek Instruments
Catalog#: Synergy H1
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Bacterial Aggregation Assay in the Presence of Cyclic Lipopeptides
Author:
Date:
2018-01-05
[Abstract]  Lipopeptides is an important class of biosurfactants having antimicrobial and anti-adhesive activity against pathogenic bacteria. These include surfactin, fengycin, iturin, bacillomycin, mycosubtilin, lichenysin, and pumilacidin (Arima et al., 1968; Naruse et al., 1990; Yakimov et al., 1995; Steller and Vater, 2000; Roongsawang et al., 2002; Vater et al., 2002). To date, none of these lipopeptides have been reported to possess any anti-motility activity. We isolated, purified and characterized two novel cyclic lipopeptides (CLPs) from Bacillus sp. 176 using high performance liquid chromatography, mass spectrometry and nuclear magnetic resonance spectroscopy. CLPs dramatically suppress the motility of pathogenic bacterium Vibrio ... [摘要]  脂肽是一类重要的生物表面活性剂,对致病菌具有抗菌和抗粘连活性。这些包括表面活性肽,fengycin,伊库菌素,杆菌霉素,mycosubtilin,地衣素和pumilacidin(Arima等人,1968; Naruse等人,1990; Yakimov等人1995; Steller和Vater,2000; Roongsawang等人,2002; Vater等人,2002)。迄今为止,这些脂肽都没有被报道具有任何抗运动活性。我们从芽孢杆菌分离,纯化和鉴定了两种新的环状脂肽(CLPs)。 176使用高效液相色谱,质谱和核磁共振光谱。 CLPs极大地抑制致病性溶藻弧菌的运动,并促进细胞聚集而不诱导细胞死亡。根据Dalili所述用于抗生物膜测定的方法进行细胞聚集测定(Dalili等人,2015)。将来,该测定法可以适用于测试来自细菌的脂肽样活性物质的细胞聚集和抗生物膜活性。

【背景】过度使用广谱抗生素和随之而来的抗药性细菌的增殖刺激了开发环境友好型生物防治措施的努力,以减少健康危害和环境污染(Nam等人,2016; Sajitha >等。,2016)。近年来,生物表面活性剂的抗微生物特性已被越来越多地用于抗菌,抗真菌和抗病毒的应用(Cameotra和Makkar,2004; Singh和Cameotra,2004; Rodrigues等人 ...

Advanced Design of Minimalistic Dumbbell-shaped Gene Expression Vectors
Author:
Date:
2017-08-05
[Abstract]  Minimal DNA vectors exclusively comprising therapeutically relevant sequences hold great promise for the development of novel therapeutic regimen. Dumbbell-shaped vectors represent non-viral non-integrating DNA minimal vectors which have entered an advanced stage of clinical development (Hardee et al., 2017). Spliceable introns and DNA nuclear import signals such as SV40 enhancer sequences are molecular features that have found multiple applications in plasmid vectors to improve transgene expression. In dumbbells however, effects triggered by introns were not investigated and DNA-based nuclear import sequences have not found applications yet, presumably because dumbbell vectors have continuously been minimized with regard to size. We investigated the effects of an intron and/or ... [摘要]  唯一包含治疗相关序列的最小DNA载体对于新型治疗方案的发展具有很大的希望。哑铃型载体代表已经进入临床发展的晚期阶段的非病毒非整合DNA最小载体(Hardee等人,2017)。可接合的内含子和DNA核输入信号如SV40增强子序列是在质粒载体中发现多个应用以改善转基因表达的分子特征。然而,在哑铃中,由内含子引发的效应未被研究,基于DNA的核导入序列尚未发现应用,可能是因为哑铃载体在尺寸上不断被最小化。我们调查内含子和/或SV40增强子衍生序列对哑铃载体驱动的报告基因表达的影响。发现可拼接内含子的实现在所有研究的细胞系中无条件地增强基因表达。相反,SV40增强子的使用改善了细胞类型依赖性的基因表达。虽然这两个特征显着增加哑铃载体大小,但内含子和增强子或两者的组合都不会对基因表达产生负面影响。相反,与质粒或对照哑铃相比,这两个特征在一起改善了哑铃驱动的基因表达,高达160-或56倍。因此,强烈建议考虑用于哑铃矢量设计的内含子和SV40增强子。这种先进的设计可以促进哑铃型DNA载体的临床前和临床应用。
【背景】虽然许多基因已经使用哑铃形DNA载体表达,但大多数这些应用使用包括启动子,编码序列(CDS)和转录终止子的基本设计。一些载体包括嵌合内含子,然而,没有报道通过这种设计增强了转基因表达(Schirmbeck等人,2001)。在这里,我们研究了分子特征引发的效应,这些特征经常在哑铃驱动基因表达的质粒设计中得到应用:1.已知来自人β-珠蛋白基因剪接的嵌合内含子促进RNA加工,核出口,随后基因表达(Luo ...

Isolation of Exosomes from Semen for in vitro Uptake and HIV-1 Infection Assays
Author:
Date:
2017-04-05
[Abstract]  Exosomes are membranous extracellular nanovesicles of endocytic origin. Exosomes are known to carry host and pathogen-derived genomic, proteomic, lipidomic cargos and other extraneous molecules. Exosomes are secreted by diverse cell types into the extracellular milieu and are subsequently internalized by recipient neighboring or distal cells. Upon internalization, exosomes condition recipient cells by donating their cargos and/or activating various signal transduction pathways, consequently regulating physiological and pathophysiological processes. Exosomes facilitate intercellular communication, modulate cellular phenotype, and regulate microbial pathogenesis. We have previously shown that semen exosomes (SE) inhibit HIV-1 replication in various cell types. Here, we describe detailed ... [摘要]  外来体是内膜起源的膜性胞外纳米囊。 已知外来载体携带宿主和病原体衍生的基因组,蛋白质组,脂质体载体和其他外来分子。 外来体由不同细胞类型分泌到细胞外环境中,随后被受体相邻细胞或远端细胞内化。 在内化后,外来体通过捐赠其载体和或激活各种信号转导途径来调节受体细胞,从而调节生理和病理生理过程。 外来体促进细胞间通讯,调节细胞表型和调节微生物发病机制。 我们以前表明精液外来体(SE)抑制各种细胞类型的HIV-1复制。 在这里,我们描述特征SE的详细协议。 该方案可以适应或修改,并用于评估感兴趣的其他细胞外小泡。

外来体是由许多细胞类型的晚期内体室内的内体膜向内发生的结果而引起的膜状纳米囊(Simons and Raposo,2009)。外来体被许多细胞类型(Iglesias等人,2012)释放到细胞外环境中,并且被发现在包括血液在内的生物流体中(Kaur等人,2014)尿(Liem等人,2013)唾液(Madison等人,2015)和母乳(Madison等人,2014; Naslund ,2014)。人类精液含有由包括前列腺分泌腺泡细胞在内的男性生殖道组织产生的纳米囊泡的异质群体(Madison等人,2014; Madison等人,2015) (Sahlen等人,2002)和附睾上皮细胞(Frenette等人,2010)以及vasa感染,睾丸和囊泡腺细胞( ...

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