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15 cm Petri dish

Company: Thermo Fisher Scientific
Catalog#: 168381
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Inositol Phosphates Purification Using Titanium Dioxide Beads
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Date:
2018-08-05
[Abstract]  Inositol phosphates (IPs) comprise a family of ubiquitous eukaryotic signaling molecules. They have been linked to the regulation of a pleiotropy of important cellular activities, but low abundance and detection difficulties have hampered our understanding. Here we present a method to purify and enrich IPs or other phosphate-rich metabolites from mammalian cells or other sample types. Acid-extracted IPs from cells bind selectively via their phosphate groups to titanium dioxide beads. After washing, the IPs are easily eluted from the beads by increasing the pH. This technique, in combination with downstream analytical methods such as PAGE or SAX-HPLC, opens unprecedented investigative possibilities, allowing appropriate analysis of IPs from virtually any biological or non-biological source. [摘要]  肌醇磷酸(IP)包含普遍存在的真核信号分子家族。 它们与重要细胞活动的多效性的调节有关,但低丰度和检测困难阻碍了我们的理解。 在这里,我们提出了一种从哺乳动物细胞或其他样本类型中纯化和富集IP或其他富含磷酸盐的代谢物的方法。 来自细胞的酸提取的IP通过其磷酸基团选择性地结合到二氧化钛珠子上。 洗涤后,通过增加pH容易从珠中洗脱IP。 该技术与下游分析方法(如PAGE或SAX-HPLC)相结合,开启了前所未有的研究可能性,允许从几乎任何生物或非生物来源对IP进行适当分析。

【背景】肌醇磷酸(IP)是保守信号分子家族,在真核生物中普遍存在(Irvine和Schell,2001; Tsui和York,2010)。它们涉及广泛的细胞活动的调节,包括钙信号传导,运输和磷酸盐稳态(Wilson et al。,2013; Thota和Bhandari,2015; Azevedo和Saiardi,2017; )。然而,我们对IP信号的理解受到了它们难以研究的事实的阻碍。

与其他富含磷酸盐的分子(例如核苷酸)不同,IP在UV / Vis范围内不吸收,并且通常以相对低的丰度存在于细胞中。用于IP检测和分析的传统方法是用 3 ...

A Method for Extracting the Nuclear Scaffold from the Chromatin Network
Author:
Date:
2018-04-20
[Abstract]  Each cell contains many large DNA polymers packed in a nucleus of approx. 10 μm in diameter. With histones, these DNA polymers are known to form chromatins. How chromatins further compact in the nucleus is unclear but it inevitably depends on an extensive non-chromatin nuclear scaffold. Imaging of endogenous chromatin network and the complementary scaffold that support this network has not been achieved but biochemical and proteomic investigations of the scaffold can still provide important insights into this chromatin-organizing network. However, this demands highly inclusive and reproducible extraction of the nuclear scaffold. We have recently developed a simple protocol for releasing the scaffold components from chromatins. The inclusiveness of the extract was testified by the ... [摘要]  每个细胞都含有许多大型DNA聚合物,其中包含大约一个核。直径10微米。用组蛋白,已知这些DNA聚合物形成染色质。染色质在核中如何进一步致密还不清楚,但它不可避免地依赖于广泛的非染色质核支架。内源性染色质网络的成像和支持该网络的互补支架尚未实现,但支架的生化和蛋白质组学研究仍然可以提供关于该染色质组织网络的重要见解。但是,这需要高度包容和可重复的提取核支架。我们最近开发了一个简单的协议,用于从染色质中释放脚手架组件。提取物的包容性由以下观察结果证实:当从核中提取时,剩余的核染色质被释放为延伸且通常平行的染色质纤维。基本上,该方案包括纯核的产生,用Triton X-100处理细胞核以产生包膜消耗的细胞核(TxN),并在含蔗糖的缓冲液中在500mM NaCl中提取细胞核。 TxN的这个组合提取被称为TxNE。

【背景】通过蛋白质和核糖核蛋白的复杂支架,染色质在细胞核中密集并动态地压缩。与细胞骨架网络不同(Fischer和Fowler,2015),对这种核支架的显微观察在技术上是具有挑战性的。这可能反映了每个细胞核内染色质的主导地位,支架与细胞核交织在一起。核的球形排列也对成像这种支架结构造成挑战。核支架的主要元素是核层(NL)(Gruenbaum和Foisner,2015)。 ...

Ex vivo Analysis of Lipolysis in Human Subcutaneous Adipose Tissue Explants
Author:
Date:
2018-02-05
[Abstract]  Most studies of human adipose tissue (AT) metabolism and functionality have been performed in vitro on isolated mature adipocyte or in situ using the microdialysis technique (Lafontan, 2012). However, these approaches have several limitations. The use of mature isolated adipocytes is limiting as adipocytes are not in their physiological environment and the collagenase digestion process could affect both adipocyte survival and functionality. While metabolic studies using microdialysis have brought the advantage of studying the lipolytic response of the adipose tissue in situ, it provides only qualitative measures but does not give any information on the contribution of different adipose tissue cell components. Moreover, the number of microdialysis probes that can ... [摘要]  人脂肪组织(AT)代谢的上havebeen执行的大多数研究和功能的体外上分离的脂肪细胞成熟或原位使用微透析技术(Lafontan,2012)。但是,这些方法有几个限制。成熟的分离的脂肪细胞的使用是有限的,因为脂肪细胞不在其生理环境中,胶原酶消化过程可能影响脂肪细胞的存活和功能。虽然微透析代谢研究带来了学习原位脂肪组织中的的脂肪分解反应的优点的它仅提供定性的措施,但并没有给出不同的脂肪组织细胞成分的贡献的任何信息。此外,可以在受试者中同时使用的微透析探针的数量是有限的,并且可以受到局部血流量变化和微透析样品的分子大小截断的影响。在这里,我们提出了一个协议,以评估对脂肪组织的功能的体外在AT植允许脂肪组织的研究中其整个范围内,几个小时。此外,可以评估脂肪分解的细胞特异性影响。直接在脂肪组织基质血管室。在脂肪组织中(Gao等人,2016)。

【背景】人类白色脂肪组织(WAT)在体内能量平衡中起主要作用。脂肪细胞是表达特异性脂质处理代谢活动的特化细胞,构成超过90%的WAT体积(Lafontan,2012)。除了脂肪细胞,其他细胞类型是人类WAT中存在的例如,血管细胞,免疫细胞(淋巴细胞和巨噬细胞)和祖细胞在WAT重构和更新参与。脂肪细胞的代谢活动受到局部和全身途径整合的严格控制。在合成代谢或分解代谢条件影响调制的净脂肪细胞的代谢活性神经体液信号, I.E. ...

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