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Fetal bovine serum

Company: Atlas Biologicals
Catalog#: S11550
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Lentiviral Knockdown of Transcription Factor STAT1 in Peromyscus leucopus to Assess Its Role in the Restriction of Tick-borne Flaviviruses
Author:
Date:
2017-12-05
[Abstract]  Cellular infection with tick-borne flaviviruses (TBFVs) results in activation of the interferon (IFN) signaling pathway and subsequent upregulation of numerous genes termed IFN stimulated genes (ISGs) (Schoggins et al., 2011). Many ISGs function to prevent virus pathogenesis by acting in a broad or specific manner through protein-protein interactions (Duggal and Emerman, 2012). The potency of the IFN signaling response determines the outcome of TBFV infection (Best, 2017; Carletti et al., 2017). Interestingly, data from our lab show that TBFV replication is significantly restricted in cells of the reservoir species Peromyscus leucopus thereby suggesting a potent antiviral response (Izuogu et al., 2017). We assessed the relative contribution of IFN ... [摘要]  蜱传黄热病病毒(TBFV)的细胞感染导致干扰素(IFN)信号传导途径的激活和随后称为IFN刺激基因(ISG)(Schoggins等人,2011)的众多基因的上调。许多ISG通过蛋白质 - 蛋白质相互作用以广泛或特定的方式起作用来防止病毒发病(Duggal和Emerman,2012)。 IFN信号反应的效力决定了TBFV感染的结果(Best,2016; Carletti等人,2017)。有趣的是,我们实验室的数据显示TBFV复制在储库物种Peromyscus leucopus的细胞中显着受到限制,从而表明有效的抗病毒应答(Izuogu等人,2017)。我们评估干扰素信号对抗性的相对贡献。通过敲低IFN反应途径中的主要转录因子来抑制白血病。信号转导和转录激活因子1(STAT1)是专门针对在P。 leucopus细胞通过shRNA技术。我们进一步测试了基因敲低对细胞对IFN反应和限制病毒复制的能力的影响;结果表明当STAT1表达被改变时,leucopus细胞对IFN刺激的反应降低,并且对TBFV复制显着更敏感。

【背景】IFN信号是抵抗侵入宿主细胞的黄病毒的第一道防线(Robertson等人,2009; Lazear和Diamond,2015)。通过模式识别受体(PRR)检测与病毒颗粒相关的分子标记,然后通过转录因子引发下游信号从细胞释放1型IFN(Kawai ...

Establishment of a Human Cell Line Persistently Infected with Sendai Virus
Author:
Date:
2017-08-20
[Abstract]  Interferon regulatory transcription factor 3 (IRF3) is a transcription factor that upon activation by virus infection promotes the synthesis of antiviral genes, such as the interferons (Hiscott, 2007). In addition to inducing genes, IRF3 triggers antiviral apoptosis by RIG-I-like receptor-induced IRF3 mediated pathway of apoptosis (RIPA), which is independent of its transcriptional activity. RIPA protects against lethal virus infection in cells and mice (Chattopadhyay et al., 2016). In the absence of RIPA, caused by genetic ablation, chemical mutagenesis or inhibition of the pattern recognition receptor (PRR) retinoic acid-inducible gene I (RIG-I), Sendai virus (SeV) infection does not trigger cellular apoptosis and become persistently infected (Peters et al., 2008; ... [摘要]  干扰素调节转录因子3(IRF3)是一种通过病毒感染活化促进抗病毒基因如干扰素合成的转录因子(Hiscott,2007)。除了诱导基因外,IRF3通过RIG-I样受体诱导的IRF3介导的凋亡途径(RIPA)引发抗病毒凋亡,其与其转录活性无关。 RIPA可防止细胞和小鼠的致死病毒感染(Chattopadhyay et al。,2016)。在不存在RIPA的情况下,遗传消融引起的化学诱变或模式识别受体(PRR)视黄酸诱导型基因I(RIG-1)的抑制,仙台病毒(SeV)感染不会引发细胞凋亡并持续感染(Peters等人,2008; Chattopadhyay等人,2013)。表达IRF3的野生型(WT)细胞(U4C)经历SeV诱导的凋亡;然而,缺乏IRF3表达的P2.1细胞不能引发病毒凋亡(图1)。人类IRF3的异位表达恢复了P2.1细胞的凋亡活性(P2.1 / IRF3,图1)。 SeV用作研究致病性人类病毒的模型,难以与BSL3设施配合使用。我们以前曾报道,人和小鼠细胞都可以在没有IRF3的凋亡活性的情况下建立SeV持久性(Chattopadhyay et al。,2013)。在这里,我们概述了持续的SeV感染的人类细胞系(图2)的开发的详细程序,其连续表达病毒蛋白并产生低水平的感染性病毒颗粒。
【背景】IRF3对于通过促进抗病毒基因的转录来启动宿主细胞中的抗病毒防御机制至关重要(Hiscott,2007; ...

Primary Culture System for Germ Cells from Caenorhabditis elegans Tumorous Germline Mutants
Author:
Date:
2017-08-05
[Abstract]  The Caenorhabditis elegans germ line is an important model system for the study of germ stem cells. Wild-type C. elegans germ cells are syncytial and therefore cannot be isolated in in vitro cultures. In contrast, the germ cells from tumorous mutants can be fully cellularized and isolated intact from the mutant animals. Here we describe a detailed protocol for the isolation of germ cells from tumorous mutants that allows the germ cells to be maintained for extended periods in an in vitro primary culture. This protocol has been adapted from Chaudhari et al., 2016. [摘要]  秀丽隐杆线虫种系是胚芽干细胞研究的重要模型系统。 野生型C。 线虫生殖细胞是合胞体,因此不能在体外培养中分离。 相比之下,来自肿瘤突变体的生殖细胞可以完全被细胞化并从突变动物中完整分离。 在这里,我们描述了从肿瘤突变体中分离生殖细胞的详细方案,其允许生殖细胞在体外原代培养中长时间维持。 该协议已从2016年Chaudhari等人改编。
【背景】秀丽生殖细胞在位于两个性腺臂的远端区域的两个成体干细胞龛中产生(Hansen和Schedl,2013; Kimble和Seidel,2013)。在野生型雌雄同体中,有丝分裂生殖细胞仅限于性腺臂的远端,干细胞生态位。野生型生殖细胞是合胞体,并且包含延伸通过性腺臂中心区域的共同细胞质的开口。 ℃。线虫肿瘤种系突变体在整个性腺中增加了生殖细胞的有丝分裂增殖。我们发现肿瘤种系突变体通常具有完整的细胞生殖细胞,其含有完整的质膜(Chaudhari等人,2016)。这种细胞化允许生殖细胞的分离及其在培养中的维持。该方案描述了分离和维持培养物中肿瘤突变体的生殖细胞的方法学和组织培养基。虽然已经描述了用于C的主要培养物的培养基。 elegans 胚胎和幼虫细胞(Strange等人,2007; Zhang和Kuhn,2013),生殖细胞在这种培养基中不能存活(Chaudhari等人。 ...

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