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RPMI-1640 medium with L-glutamine and sodium bicarbonate, liquid, sterile-filtered

RPMI-1640培养基

Company: Sigma-Aldrich
Catalog#: R8758
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A 3D Skin Melanoma Spheroid-Based Model to Assess Tumor-Immune Cell Interactions
Author:
Date:
2020-12-05
[Abstract]  Three-dimensional (3D) tumor spheroids have the potential to bridge the gap between two-dimensional (2D) monolayer tumor cell cultures and solid tumors with which they share a significant degree of similarity. However, the progression of solid tumors is often influenced by the dynamic and reciprocal interactions between tumor and immune cells. Here we present a 3D tumor spheroid-based model that might shed new light on understanding the mechanisms of tumor and immune cell interactions. The model first utilizes the hanging drop assay, which serves as one of the simplest methods for generating 3D spheroids and requires no specialized equipment. Next, pre-established spheroids can be co-cultured either directly or indirectly with an immune cell population of interest. Using skin melanoma, we ... [摘要]  [摘要]三维(3D)肿瘤球体具有弥合二维(2D)单层肿瘤细胞培养物与实体瘤之间的差距的潜力,它们之间有着显着的相似性。然而,实体瘤的进展通常受肿瘤与免疫细胞之间的动态相互作用和相互影响的影响。在这里,我们提出了一个基于3D肿瘤球体的模型,该模型可能会为了解肿瘤与免疫细胞相互作用的机制提供新的思路。的该模型首先利用了悬滴法,这是生成3D球体的最简单方法之一,不需要专门的设备。接下来,可以将预先建立的球体与目标免疫细胞群体直接或间接共培养。使用皮肤黑色素瘤,我们提供了该模型的详细说明,这可能对成功治疗策略的开发具有重要意义。

[背景]三维(3D)肿瘤球体是球形的自组装肿瘤细胞聚集体,类似于微转移瘤并复制实体瘤的许多特征。就像在无血管实体瘤的非增生区域一样,球体内部区域的肿瘤细胞通常表现出扰动的基因和蛋白质表达,新陈代谢改变,细胞周期停滞和坏死(Sant and Johnston ,2017)。但是,用于生成3D椭球体的大多数当前可用技术是耗时,困难和昂贵的。一种简单,快速,简便的生成3D球体的方法是使用悬滴法(Foty ...

Generating Three-dimensional Human Granulomas in vitro to Study Mycobacterium tuberculosis-host Interaction
Author:
Date:
2020-11-20
[Abstract]  Granulomas are organized multicellular structures that constitute the hallmark of an infection by the human pathogen Mycobacterium tuberculosis (Mtb). A better understanding of the complex host-Mtb interactions within the granuloma’s environment may lead to new therapeutic or preventive tools to improve the control of the tuberculosis pandemic. To date, several in vitro models that are able to mimic human nascent granulomas have been reported. Here we describe a protocol in which Mtb-infected human peripheral blood mononuclear cells (PBMCs) are embedded within a collagen matrix leading to the formation of three-dimensional micro-granulomas. Subsequently, PBMCs and Mtb can be retrieved allowing multiparametric readouts from both the host and the ... [摘要]  [摘要]肉芽肿是有组织的多细胞结构,构成了人类病原体结核分枝杆菌(Mtb )感染的标志。对肉芽肿环境中复杂的宿主-Mtb相互作用的更好理解可能会导致新的治疗或预防工具,以改善对结核病大流行的控制。迄今为止,已经报道了几种能够模仿人类新生肉芽肿的体外模型。在这里我们描述一个协议,其中Mtb 被感染的人外周血单核细胞(PBMC)嵌入胶原蛋白基质中,导致形成三维微肉芽肿。随后,可以检索PBMC和Mtb,从而从宿主和病原体中读取多参数。除了并入生理性细胞外基质外,该模型还具有重现休眠样Mtb特征的独特优势,以及在免疫调节治疗下观察到的Mtb复苏的再生,其他已发表的体外实验方法尚未见报道。肉芽肿。

关键词:分枝杆菌,浴池erculosis,肉芽肿,主机,我ñ体外模型,休眠,复苏



[背景]结核病(TB)是一种空气传播的疾病,其包括由人类病原体肺和肺外感染结核分枝杆菌(Mtb的)。结核病在2019年估计造成150万人死亡(世卫组织,2019年),仍然是世界上最致命的传染病。结核病免疫发病机制的特点是形成了组织性的,称为肉芽肿的多细胞簇(Gengenbacher和Kaufmann,2012)。这些结构主要由被感染的和未感染的巨噬细胞的核心组成,周围是淋巴细胞边缘。肉芽肿内的敌对环境推动Mtb进入可能与疾病的潜在形式相关的缓慢或非复制性休眠状态。因此,Mtb休眠导致对针对分枝杆菌复制过程中活跃的代谢途径的抗生素的耐受性增加。 ...

In vitro Antigen-presentation Assay for Self- and Microbial-derived Antigens
Author:
Date:
2017-06-05
[Abstract]  Antigen presenting cells (APC) are able to process and present to T cells antigens from different origins. This mechanism is highly regulated, in particular by Patter Recognition Receptor (PRR) signals. Here, I detail a protocol designed to assess in vitro the capacity of APC to present antigens derived from bacteria, apoptotic and infected apoptotic cells. [摘要]  抗原呈递细胞(APC)能够处理和呈递来自不同来源的T细胞抗原。这种机制是高度调节的,特别是通过Patter Recognition Receptor(PRR)信号。在这里,我详细说明了一种设计用于评估体外的APC方案,用于展示来源于细菌,凋亡和感染的凋亡细胞的抗原。

背景 T细胞淋巴细胞在其表面上表达T细胞受体(TCR),其允许识别作为与主要组织相容性复合物(MHC)分子结合的抗原加工和呈递的抗原的细胞(自身)或微生物(非自身)抗原)呈递细胞(APC)。 APC能够处理抗原并将其呈递给T细胞,并且MHC-TCR相互作用是感染和自身免疫应答期间T细胞活化的关键步骤。
 以前的作品已经描述了基于刺激模式识别受体(PRR),例如toll样受体(TLR)(Blander和Medzhitov,2004和2006)的抗原呈递的调节机制。实际上,特异性地来自含有微生物病原体的吞噬体的TLR信号有利于在MHC-II分子内呈递非自身抗原。另一方面,凋亡细胞吞噬后产生的自身抗原由于不存在TLR刺激而导致溶酶体降解。然而,当两者都来自感染的凋亡细胞并且同时由相同的吞噬体携带时,自身和非自身抗原的分离不会发生,其由针对抗原呈递的TLR信号最佳地定制。已经使用骨髓来源的树突状细胞(BMDC)和凋亡性小鼠B细胞 - ...

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