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Fetal Bovine Serum, USDA Tested

胎牛血清,USDA测试

Company: Thermo Fisher Scientific
Catalog#: SH3091003
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In vitro Homeostatic Proliferation of Human CD8 T Cells
Author:
Date:
2017-11-20
[Abstract]  Long-lived T-cell–mediated immunity requires persistence of memory T cells in an antigen-free environment while also maintaining a heightened capacity to recall effector functions. Such antigen-independent homeostatic proliferation is mediated in part by the common gamma-chain cytokines IL-7 and IL-15. To further explore the mechanisms governing maintenance of effector functions in long-lived memory T cells during antigen-independent proliferation, human naïve and memory CD8 T cells can be sorted from peripheral blood mononuclear cells (PBMCs), labeled with the proliferation-tracking dye carboxyfluorescein succinimidyl ester (CFSE), and then purified based on their levels of cell division. This allows investigators to assess differences in the desired molecular target in cells that have ... [摘要]  长寿T细胞介导的免疫需要在无抗原环境中持续存在记忆T细胞,同时还保持提高的回忆效应器功能的能力。这种不依赖于抗原的体内平衡增殖部分由常见的γ链细胞因子IL-7和IL-15介导。为了进一步探索在抗原非依赖性增殖过程中维持长效记忆T细胞中效应子功能的机制,可以从外周血单核细胞(PBMCs)中分选人幼稚和记忆CD8T细胞,用增殖跟踪染料羧基荧光素琥珀酰亚胺酯(CFSE),然后根据它们的细胞分裂水平进行纯化。这使得研究人员能够评估经历细胞因子驱动的增殖的细胞中期望的分子靶点的差异。我们在这里提供了一个协议,用于评估在分裂和未分裂的人类幼稚和记忆CD8 T细胞中的表观遗传程序,在用IL-7和IL-15培养7天之后,以说明这种方法如何阐明控制在长寿记忆CD8T细胞的稳态期间保持效应子功能。
【背景】获得性免疫的一个主要特征是对先前遇到的病原体的免疫记忆的发展(Plotkin等人,2013)。记忆CD8 T细胞在为宿主以前遇到的病原体提供终生保护方面发挥重要作用,但为了提供长寿命的保护,T细胞必须已经获得了在无抗原中持续并保持效应功能的能力环境。在此期间,记忆T细胞响应于IL-7/15细胞因子进行抗原非依赖性增殖,尽管程度不同。

记忆CD8 T细胞的总池是几种不同的细胞亚群的异质组合,其对稳态细胞因子的反应不同。例如,CD8 ...

Generation of Mouse Thyroid Calcitonin-producing Cell Tumors from Primary Mouse Tumors
Author:
Date:
2015-12-20
[Abstract]  Medullary thyroid cancers (MTCs) are derived from calcitonin-producing cells (C cells) of neuroendocrine origin. Rb heterozygous mice develop low-grade C cell adenocarcinoma following biallelic inactivation of the Rb tumor suppressor gene loci. Additional inactivation of another tumor suppressor gene such as Trp53, Arf or Cdkn1a allows Rb-deficient mice to generate more aggressive C cell adenocarcinoma (Takahashi et al., 2006; Shamma et al., 2009; Kitajima et al., 2015). To characterize C cell adenocarcinoma cells derived from Rb-deficient mice of different genetic backgrounds, we attempted to extract C cell adenocarcinoma cells from primary thyroid tumor tissue. Since primary mouse small cell lung cancer (SCLC) cells ... [摘要]  甲状腺髓样癌(MTC)源自神经内分泌起源的降钙素产生细胞(C细胞)。Rb 杂合小鼠在b 肿瘤抑制基因位点的双等位基因失活后发展为低级C细胞腺癌。另一种肿瘤抑制基因(例如Trp53 ,Arf 或 Cdkn1a)的额外失活使Rb缺陷型小鼠产生更具侵袭性的C细胞腺癌(Takahashi, 2006; Shamma等人,2009; Kitajima等人,2015年)。为了表征来自不同遗传背景的Rb缺陷小鼠的C细胞腺癌细胞,我们尝试从原发性甲状腺肿瘤组织中提取C细胞腺癌细胞。由于原代小鼠小细胞肺癌(SCLC)细胞起源于也干细胞C的神经内分泌细胞,因此可以建立为非粘附和粘附细胞(Calbo等人,2011),我们将其方法应用于MTC。在这里我们描述我们的隔离技术的非粘附和粘附细胞培养从原发性甲状腺髓样肿瘤组织。我们发现C细胞的分子标记物如降钙素和Ascl1主要富集在非粘附性群体中(Kitajima等人,2015)。这与以下事实一致:最常分布的人MTC细胞系TT之一是非粘附性的。

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