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Double Beam Spectrophotometer U-2900/2910

双光束分光光度计U-2900/2910

Company: Hitachi
Catalog#: U2900
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Detection of Reactive Oxygen Species (ROS) in Cyanobacteria Using the Oxidant-sensing Probe 2’,7’-Dichlorodihydrofluorescein Diacetate (DCFH-DA)
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Date:
2017-09-05
[Abstract]  Reactive oxygen species (ROS) are cell signaling molecules synthesized inside the cells as a response to routine metabolic processes. In stress conditions such as ultraviolet radiation (UVR), ROS concentration increases several folds in the cells that become toxic for the cell survival. Here we present the method for in vivo detection of ROS by using an oxidant-sensing probe 2’,7’-dichlorodihydrofluorescein diacetate (DCFH-DA) in cyanobacteria. This method provides reliable, simple, rapid and cost effective means for detection of ROS in cyanobacteria. [摘要]  活性氧(ROS)是细胞内合成的细胞信号分子,作为对常规代谢过程的反应。 在紫外线照射(UVR)等应激条件下,ROS浓度在细胞中增加数倍,对细胞存活有毒性。 在这里,我们介绍了通过使用蓝细菌中的氧化剂感测探针2',7'-二氯二氢荧光素二乙酸酯(DCFH-DA)来体内检测ROS的方法。 该方法提供可靠,简单,快速和成本有效的检测蓝细菌中的ROS的方法。
【背景】蓝藻是最古老的含氧光合自养体;它们在水生和陆地生态系统的生物量生产中发挥重要作用,并作为各种增值产品的来源(Vaishampayan等,2001;Häderet al。,2007; Fischer,2008)。近年来,臭氧层的消耗导致太阳紫外线辐射(UVR)涌入增加,这对所有存在于地球上的生物(包括蓝细菌)都是有害的(Holzinger和Lutz,2006)。 UVR通过作用于DNA /蛋白质或间接通过活性氧(ROS)的氧化损伤直接伤害蓝细菌(He和Häder,2002)。在植物,藻类和哺乳动物细胞中,已经使用各种荧光和化学发光方法检测ROS(Crow,1997; He和Häder,2002; Soh,2006; Wu et al。,2007; Palomero et al。,2008)。
  2',7'-二氯二氟荧光素二乙酸酯(DCFH-DA)是一种非荧光,细胞可渗透的染料,其在细胞酯酶的作用下在细胞内水解成其极性但非荧光形式的DCFH,因此保留在细胞中。通过细胞内ROS和其他过氧化物的作用氧化DCFH使分子变成其可通过各种荧光方法检测的2',7'-二氯荧光素(DCF)的高度荧光形式(He和Häder,2002; ...

In vitro Studies: Inhibition of Nevirapine Metabolism by Nortriptyline in Hepatic Microsomes
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Date:
2015-10-05
[Abstract]  One of the most prevalent and interfering psychosocial comorbidities of HIV infection is clinical depression (22 to 45%). For this reason, a study of a possible interaction between the nonnucleoside reverse transcriptase inhibitor nevirapine (NVP) and the tricyclic antidepressant nortriptyline (NT) was carried out. In vitro studies with rat and human hepatic microsomes showed a marked inhibition of NVP metabolism by NT being more intense in rat than in human. The extrapolation of these results to humans suggests increased NVP side effects when both drugs are coadministered, but additional in vivo human studies are required to evaluate the clinical implication of this interaction.

This protocol describes a technique for detecting and measuring the inhibition of ...
[摘要]  HIV感染的最普遍和干扰的心理社会共病是临床抑郁症(22%至45%)。 为此,进行了非核苷逆转录酶抑制剂奈韦拉平(NVP)和三环抗抑郁药去甲替林(NT)之间可能的相互作用的研究。 使用大鼠和人肝微粒体的体外研究显示在大鼠中NT比在人中更强烈的NVP代谢的显着抑制。 将这些结果外推到人表明当两种药物共同给药时,NVP副作用增加,但是需要另外的体内人体研究来评价这种相互作用的临床意义。
该方案描述了 检测和测量肝微粒体中去甲替林对奈韦拉平代谢的抑制的技术。

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