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公司名称: Sigma-Aldrich
产品编号: U1250
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A Streamlined Method for the Preparation of Growth Factor-enriched Thermosensitive Hydrogels from Soft Tissue
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Date:
2017-02-05
[Abstract]  Hydrogels are an ideal medium for the expansion of cells in three dimensions. The ability to induce cell expansion and differentiation in a controlled manner is a key goal in tissue engineering. Here we describe a detailed method for producing hydrogels from soft tissues with an emphasis on adipose tissue. In this method, soluble, extractable proteins are recovered from the tissue and stored while the remaining insoluble tissue is processed and solubilised. Once the tissue has been sufficiently solubilised, the extracted proteins are added. The resulting product is a thermosensitive hydrogel ... [摘要]  水凝胶是三维细胞扩增的理想媒介。以受控方式诱导细胞扩增和分化的能力是组织工程中的关键目标。在这里,我们描述了从软组织生产水凝胶的详细方法,重点是脂肪组织。在该方法中,可溶性可提取蛋白从组织中回收并储存,而剩余的不溶组织被加工和溶解。一旦组织被充分溶解,就加入提取的蛋白质。所得产物是具有代表天然组织的蛋白质的热敏水凝胶。这种方法解决了在使用某些生物材料时遇到的常见问题,例如高脂质含量,DNA污染和找到适当的灭菌方法。尽管本文的重点是脂肪组织,但使用这种方法,我们已经从其他软组织(包括肌肉,肝脏和心脏组织)中产生了水凝胶。

背景 组织工程的主要目标是通过向身体提供具有与目标部位相似性质的支架来产生新的组织。这允许最佳的重塑并且使得能够形成新生内源性组织。在脂肪组织工程领域,来自脂肪组织的生物材料是特别有意义的,因为脂肪组织广泛可用,并且在理论上为脂肪形成诱导提供了最佳可能的环境(Flynn等人,2007; Flynn,2010; Uriel等人,2008; Choi等人,2009; Young等人,2011)。已经确定脂肪细胞分泌脂肪形成因子(Li et al。,1998; Shillabeer等人,1989; Shillabeer等人, ...

Expression, Purification and Crystallization of Recombinant Arabidopsis Monogalactosyldiacylglycerol Synthase (MGD1)
Author:
Date:
2016-12-20
[Abstract]  In plant cells, galactolipids are predominant, representing up to 50% of the lipid content in photosynthetic tissues. Galactolipid synthesis is initiated by MGDG synthases (MGDs), which use UDP-galactose as a donor sugar and diacylglycerol (DAG) as acceptor, to form monogalactosyldiacylglycerol (MGDG). This protocol is used to produce a recombinant form of Arabidopsis thaliana (A. thaliana) monogalactosyldiacylglycerol synthase 1 (MGD1) protein, in Escherichia coli (E. coli), using a two-step chromatographic purification procedure. The protein is easily ... [摘要]  在植物细胞中,半乳糖脂是主要的,代表高达光合组织脂质含量的50%。通过使用UDP-半乳糖作为供体糖和二酰基甘油(DAG)作为受体的MGDG合成酶(MGD)启动半乳糖脂合成以形成单糖基二酰基甘油(MGDG)。该方案用于在大肠杆菌中产生拟南芥(Arabidopsis thaliana)(拟南芥)单糖半乳糖二酰基甘油合酶1(MGD1)蛋白的重组形式(大肠杆菌),使用两步色谱纯化方法。蛋白质容易表达和纯化至数量,适用于生物化学和结构研究。还描述了MGD1的结晶。

背景 以前在e中表达植物MGD的尝试。大肠杆菌显示约99%的重组蛋白质积累在包涵体中(Miège等,1999)。开发了使用洗涤剂或体外包涵体折叠方案的细菌膜的溶解,并产生足够的纯和活性级分,足以监测酶的活性,但不进行其结构研究(Nishiyama et ...

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