| Flow Cytometric Analysis of HIV-1 Transcriptional Activity in Response to shRNA Knockdown in A2 and A72 J-Lat Cell Lines
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Author:
Date:
2017-06-05
[Abstract] The main obstacle to eradicating HIV-1 from patients is post-integration latency (Finzi et al., 1999). Antiretroviral treatments target only actively replicating virus, while latent infections that have low or no transcriptional activity remain untreated (Sedaghat et al., 2007). To eliminate viral reservoirs, one strategy focuses on reversing HIV-1 latency via ‘shock and kill’ (Deeks, 2012). The basis of this strategy is to overcome the molecular mechanisms of HIV-1 latency by therapeutically inducing viral gene and protein expression under antiretroviral therapy and to cause selective cell death via the lytic properties of the virus, or the immune system now recognizing the infected cells. Recently, a number of studies have described the therapeutic potential of ...
[摘要] 消除HIV-1患者的主要障碍是后整合延迟（Finzi等人，1999）。抗逆转录病毒治疗仅针对主动复制病毒，而具有低转录活性或无转录活性的潜伏感染仍未得到治疗（Sedaghat等人，2007）。为了消除病毒性水库，一项战略重点是通过“休克和杀死”来逆转HIV-1潜伏期（Deeks，2012）。该策略的基础是通过在抗逆转录病毒治疗下通过治疗性诱导病毒基因和蛋白质表达来克服HIV-1潜伏期的分子机制，并通过病毒的溶解性质或现在识别感染细胞的免疫系统引起选择性细胞死亡。最近，许多研究已经描述了药物抑制人类溴结构域蛋白质的溴结构域和末端（BET）家族的成员的治疗潜力（Filippakopoulos等人，2010; Dawson等人＆ / em>，2011; Delmore等人，2011），其包括BRD2，BRB3，BRD4和BRDT。小分子BET抑制剂，例如JQ1（Filippakopoulos et al。，2010; Delmore等人，2011），I-BET（Nicodeme等人＆lt; / ...
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| Flow Cytometric Analysis of Drug-induced HIV-1 Transcriptional Activity in A2 and A72 J-Lat Cell Lines
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Author:
Date:
2017-05-20
[Abstract] The main obstacle to eradicating HIV-1 from patients is post-integration latency (Finzi et al., 1999). Antiretroviral treatments target only actively replicating virus, while latent infections that have low or no transcriptional activity remain untreated (Sedaghat et al., 2007). A combination of antiretroviral treatments with latency-purging strategies may accelerate the depletion of latent reservoirs and lead to a cure (Geeraert et al., 2008). Current strategies to reactivate HIV-1 from latency include use of prostratin, a non-tumor-promoting phorbol ester (Williams et al., 2004), BET inhibitors (Filippakopoulos et al., 2010; Delmore et al., 2011), and histone deacetylase (HDAC) inhibitors, such as suberoylanilidehydroxamic acid (i.e. ...
[摘要] 消除HIV-1患者的主要障碍是后整合延迟（Finzi等，1999）。抗逆转录病毒治疗仅针对主动复制病毒，而具有低转录活性或无转录活性的潜伏性感染仍未得到治疗（Sedaghat et al。，2007）。抗逆转录病毒治疗与潜伏期清除策略的组合可以加速潜伏性储层的消耗并导致治愈（Geeraert等人，2008）。从潜伏期重新激活HIV-1的当前策略包括使用前列腺素，非促肿瘤佛波酯（Williams等人，2004），BET抑制剂（Filippakopoulos等人， （HDM）抑制剂，例如辛苯甲酰苯胺异羟肟酸（SAHA或Vorinostat））（Kelly ，2010; Delmore等人，2011）和组蛋白脱乙酰酶et al。，2003; Archin等人，2009; Contreras等人，2009; Edelstein等人。 ，2009）。由于HIV-1潜伏期的机制是多样的，有效的再激活可能需要组合策略（Quivy等人，2002）。以下方案描述了基于流式细胞仪的方法，用于量化药物治疗后HIV-1长末端重复（LTR）的转录激活。该协议被优化用于研究含有GFP盒的潜伏的HIV-1感染的Jurkat（J-Lat）细胞系。含有不同报道物的J-Lats，例如萤光素酶，可以用所述的药物进行治疗，但必须进行不同的分析。
背景 ...
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| T Follicular Helper Cell Coculture Assay
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Author:
Date:
2014-01-05
[Abstract] T follicular helper (Tfh) cells constitute a distinct subset of CD4+ T cells specialized in providing help to B cells in germinal centers. Phenotypically, Tfh cells are characterized by their high expression of the chemokine receptor CXCR5 that allows their migration into B cell follicles as well as high expression of PD-1, BTLA, the co-stimulatory molecules ICOS and SLAM and the transcription factors BCL6 and cMaf. Tfh cells are the main producers of IL-21 as well as other cytokines like IL-4 and IL-10 critical for B cell survival and differentiation. Tfh cells drive somatic hypermutation and the generation of long-lived memory B cells and plasma cells having an essential role in the development of protective immunity. Developing a coculture system to measure the effects of ...
[摘要] T滤泡辅助（Tfh）细胞构成专门提供对生发中心中的B细胞的帮助的CD4 + T细胞的不同亚群。表型上，Tfh细胞的特征在于其高趋化因子受体CXCR5的表达，其允许它们迁移到B细胞滤泡以及PD-1，BTLA，共刺激分子ICOS和SLAM以及转录因子BCL6和cMaf的高表达。 Tfh细胞是IL-21以及其他细胞因子如IL-4和IL-10对B细胞存活和分化关键的主要生产者。 Tfh细胞驱动体细胞超突变和长寿记忆B细胞和浆细胞的产生在保护性免疫的发展中具有重要作用。开发共培养系统以测量Tfh细胞介导的B细胞帮助的效果是非常感兴趣的进一步我们的Tfh-B细胞相互作用的理解，并允许操纵文化条件调查潜在影响不同的微环境信号或配体/受体相互作用可能对Tfh细胞功能。
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