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Insulin syringes BD Micro-Fine + Demi 0.3 ml, 30 Gauge, 8 mm

Company: BD
Catalog#: 324826
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An ex vivo Approach to Assess Mitochondrial ROS by Flow Cytometry in AAV-tagged Astrocytes in Adult Mice
Author:
Date:
2020-03-20
[Abstract]  Mitochondrial reactive oxygen species (mROS) are naturally produced signalling molecules extremely relevant for understanding both health- and disease-associated biological processes. The study of mROS in the brain is currently underway to decipher their physiopathological roles and contributions in neurological diseases. Recent advances in this field have highlighted the importance of studying mROS signalling and redox biology at the cellular level. Neurons are especially sensitive to the harmful effects of excess mROS while astrocytic mROS have been shown to play a relevant physiological role in cerebral homeostasis and behaviour. However, given the complexity of the brain, investigating mROS formation in a specific cell-type in adult animals is methodologically challenging. Here we ... [摘要]  [摘要] 线粒体活性氧(mROS )是天然产生的信号分子,与理解健康和疾病相关的生物过程极为相关。目前正在研究大脑中的mROS ,以了解其在神经疾病中的生理病理作用和贡献。该领域的最新进展凸显了在细胞水平研究mROS 信号传导和氧化还原生物学的重要性。神经元对过量的mROS 的有害作用特别敏感,而星形细胞的mROS对 已经显示出在脑稳态和行为中起相关的生理作用。但是,鉴于大脑的复杂性,研究成年动物中特定细胞类型中mROS的形成在方法上具有挑战性。在这里,我们提出了一种方法来具体评估星形胶质细胞中的mROS 丰度,该方法结合了i )一种靶向策略,该策略基于在星形胶质细胞(胶质纤维酸性蛋白或GFAP)下表达绿色荧光蛋白(GFP)的腺相关病毒(AAV)载体的使用)启动子,以及ii)使用商业探针通过流式细胞术测量mROS 的强大且广泛扩展的方案。这项工作的意义在于,它允许通过易于使用的技术来选择性研究星形细胞mROS的丰度。

[背景 ] 氧化损伤与许多疾病的病因有关,包括神经退行性疾病,因为大脑是氧化应激以及与年龄相关的变化异常脆弱的组织(Cobley 等,2018; Mattson和Arumugam ...

Isolation and Culture of Mouse Lung ILC2s
Author:
Date:
2018-10-05
[Abstract]  Group 2 Innate Lymphoid Cells (ILC2) play an important role in immune responses at barrier surfaces, notably in the lung during airway allergic inflammation or asthma. Several studies have described methods to isolate ILC2s from wild-type naive mice, most of them using cell sorting to obtain a pure population. Here, we describe in detail, a simple, efficient method for isolation and culture of lung mouse ILC2s. Lungs from Rag2-/- mice pretreated with IL-33 are collected and processed into single cell suspensions. Lymphoid cells are then recovered by density gradient separation. Lin-CD45+ cells are selected by depletion of lineage positive cells followed by positive selection of CD45+ cells. Culture of the isolated cells for several days ... [摘要]  第2组先天性淋巴细胞(ILC2)在屏障表面,特别是在气道过敏性炎症或哮喘期间的肺中的免疫应答中起重要作用。一些研究已经描述了从野生型幼稚小鼠中分离ILC2的方法,其中大多数使用细胞分选来获得纯种群。在这里,我们详细描述了一种简单有效的肺小鼠ILC2分离和培养方法。收集用IL-33预处理的 Rag2 - / - 小鼠的肺并加工成单细胞悬浮液。然后通过密度梯度分离回收淋巴样细胞。通过耗尽谱系阳性细胞然后阳性选择CD45 + 细胞来选择Lin - CD45 + 细胞。将分离的细胞培养数天导致高度纯化的ILC2群体表达典型的细胞表面标志物(CD90.2,Sca1,CD25,CD127和IL-33R)。这些细胞可在培养物中扩增长达10天,并用于多种离体测定或体内过继转移实验。
【背景】第2组先天性淋巴细胞(ILC2)是组织驻留细胞,其在抗寄生虫先天免疫以及过敏性炎症的发展中起关键作用。它们通过产生大量的2型细胞因子IL-5和IL-13对上皮细胞衍生的细胞因子如白细胞介素-33(IL-33)起反应,后者又诱导嗜酸性粒细胞增多和粘液产生(Cayrol和Girard,2018)。为了更好地表征这些细胞的功能和调节,许多组通过荧光激活细胞分选(FACS)从野生型小鼠(WT)的肺中分选ILC2。由于稳定状态下肺中存在的ILC2数量较少,因此该方法导致纯化细胞的产量较低(每只小鼠1×10 ...

Mono Sodium Urate Crystal-induced Peritonitis for in vivo Assessment of Inflammasome Activation
Author:
Date:
2018-03-05
[Abstract]  Due to its particulate material, mono-sodium urate (MSU) crystals are potent activators of the NOD-like receptor NLRP3. Upon activation, NLRP3 induces the formation of inflammasome complexes, which lead to the production and release of mature IL-1β. Bioactive IL-1β is a potent activator of innate immune responses and promotes recruitment of inflammatory cells, including neutrophils from the blood into damaged/inflamed tissues. This protocol describes a method to study in vivo inflammasome activation via intraperitoneal injection of MSU crystals. MSU-injection results in a drastic increase of intraperitoneal IL-1β levels, promoting neutrophil infiltration. Early-stage neutrophil numbers correlate with the amount of released IL-1β and can be used as a read-out for the extent of in ... [摘要]  由于其颗粒物质,单钠尿酸盐(MSU)晶体是NOD样受体NLRP3的有效激活剂。在激活后,NLRP3诱导炎性复合体的形成,其导致成熟IL-1β的产生和释放。生物活性IL-1β是先天性免疫应答的有效激活剂,并促进炎性细胞(包括来自血液的嗜中性粒细胞)向受损/发炎组织中的募集。该协议描述了通过腹膜内注射MSU晶体研究体内炎性体活化的方法。 MSU注射导致腹膜内IL-1β水平急剧增加,促进嗜中性粒细胞浸润。早期嗜中性粒细胞数与释放的IL-1β的量相关并且可以用作体内炎性体活化程度的读数。此外,该方案也可用作无菌性腹膜炎模型,以研究嗜中性粒细胞向腹膜募集的机制,或作为获得大量体内活化的嗜中性粒细胞的手段。

【背景】先天性免疫细胞通过一组模式识别受体(PRR)识别病原体,其与病原体表面上的进化保守结构结合或通过连接其它危险相关分子模式。这些受体的一个家族是NOD-样受体(NLR),其对细胞内入侵的病原体和/或细胞内危险信号起反应(Meylan等,2006)。包括一些NLR在内的几种PRR能够诱导形成所谓的炎症复合体,所述炎性复合体介导pro-IL-1β,pro-IL-18和其他IL-1家族细胞因子的蛋白水解活化(Martinon等人,2002)。由于IL-1β和IL-18的强烈促炎特性,炎性体激活是高度调节的两步过程,涉及pro-IL-1β/ ...

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