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Pipettes

Company: Eppendorf
Catalog#: Research® plus, 0.5-10 μl, 10-100 μl, 100-1,000 μl
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Atomic Force Microscopy to Characterize Ginger Lipid-Derived Nanoparticles (GLDNP)
Author:
Date:
2021-04-05
[Abstract]  

We have demonstrated that a specific population of ginger-derived nanoparticles (GDNP-2) could effectively target the colon, reduce colitis, and alleviate colitis-associated colon cancer. Naturally occurring GDNP-2 contains complex bioactive components, including lipids, proteins, miRNAs, and ginger secondary metabolites (gingerols and shogaols). To construct a nanocarrier that is more clearly defined than GDNP-2, we isolated lipids from GDNP-2 and demonstrated that they could self-assemble into ginger lipid-derived nanoparticles (GLDNP) in an aqueous solution. GLDNP can be used as a nanocarrier to deliver drug candidates such as 6-shogaol or its metabolites (M2 and M13) to the colon. To characterize the nanostructure of GLDNP, our lab extensively used atomic force microscopy (AFM)

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[摘要]  [摘要]我们已经证明,特定人群的生姜纳米颗粒(GDNP-2)可以有效地靶向结肠,减少结肠炎,并减轻结肠炎相关的结肠癌。天然存在的GDNP-2包含复杂的生物活性成分,包括脂质,蛋白质,miRNA和生姜的次生代谢产物(姜油和松香油)。为了构建比GDNP-2更明确定义的纳米载体,我们从GDNP-2中分离出脂质,并证明它们可以自组装成在水溶液中生姜脂质衍生的纳米颗粒(GLD NP )。GLD NP可用作纳米载体,以将诸如6-shogaol或其代谢产物(M2和M13)之类的药物念珠菌递送至结肠。Ť Ó表征纳米结构GLDNP ,邻乌尔实验室中广泛使用原子力显微镜(AFM)技术作为一种工具 可视化载药的GLDN P的形态。在此,我们提供了一个详细的协议来演示这种过程。


[背景]开发新的基于药物的肠道肠道疾病(IBD)治疗方法必须克服众多挑战,包括潜在的脱靶效应,大规模生产成本以及确保组织特异性递送,全身安全性和低毒性的需求。我们的组和其他最近已经证明,人工合成的纳米颗粒可以定位低剂量的药物(例如,siRNA的,蛋白质,或肽),以结肠组织或结肠免疫细胞,例如巨噬细胞(奥博锐和兰普雷克特,2010 ;陈等人, 2017 ...

K+ Release Assay and K+ Measurement in Oocyte Assay
Author:
Date:
2020-11-05
[Abstract]  The Xenopus oocyte is a powerful system for the exogenous expression and functional characterization of plant membrane transport proteins. Until now, a number of potassium transporters and channels have been identified in oocytes expression system by the two-electrode voltage clamp technology. It is difficult to characterize K+/H+ anti-transporters, especially, electroneutral transporter. The K+ efflux assay system enables easy, fast, large-scale measurement of the transporters activity without two-electrode voltage clamp technology. This protocol describes a technique to measure the efflux activity of potassium transporter in oocytes expressing system. [摘要]  [摘要]爪蟾卵母细胞是针对外源表达和植物膜转运蛋白的功能表征一个强大的系统。迄今为止,通过两电极电压钳技术已经在卵母细胞表达系统中发现了许多钾转运蛋白和钾通道。很难表征K + / H +反转运蛋白,尤其是电中性转运蛋白。K +外排测定系统无需两电极电压钳技术即可轻松,快速,大规模地测量转运蛋白的活性。该协议描述了一种测量卵母细胞表达系统中钾转运蛋白外排活性的技术。

[背景[非洲爪蟾卵母细胞中积累了酶,蛋白质和细胞器,这些都可以被利用来生产大量,正确翻译后修饰,正确定点的外来蛋白质(Miller and Zhou,2000)。因此,卵母细胞通过使用两电极电压钳技术提供了一种有效的表达系统,以功能上表征植物膜蛋白。在卵母细胞中表达的第一个植物钾转运蛋白是K +通道(Cao等,1992)。此后,大部分钾通道和转运已经在卵母细胞的研究(Schachtman等人,1994; V é RY等人,1994; Wang和吴,2013年)。但是一些K + / H +反转运蛋白是电中性的,两电极电压钳技术无法表征这些转运蛋白。为了克服这个问题,我们采用了一种新的方法来确定这些转运蛋白的活性,方法是测量孵育前后培养基中钾含量的变化。细胞内ķ +浓度为约70 - 150mM的(韦伯,1999年)。由表达的K +转运蛋白介导的K +外排可引起细胞内和细胞外K ...

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