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Company: Sigma
Catalog#: 34860-1L-R
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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 ...

In vitro Cultivation and Visualization of Malaria Liver Stages in Primary Simian Hepatocytes
Author:
Date:
2020-08-20
[Abstract]  Human liver is the primary and obligatory site for malaria infection where sporozoites invade host hepatocytes. Malaria hepatic stages are asymptomatic and represent an attractive target for development of anti-malarial interventions and vaccines. However, owing to lack of robust and reproducible in vitro culture system, it is difficult to target and study this imperative malaria liver stage. Here, we describe a procedure that allow cultivation and visualization of malaria hepatic stages including dormant hypnozoites using primary simian hepatocytes. This method enables sensitive and quantitative assessment of different hepatic stages in vitro.
[摘要]  [摘要 ] 人肝是疟疾感染的主要场所,子孢子侵入宿主肝细胞。疟疾的肝分期是无症状的,并且是开发抗疟疾干预措施和疫苗的有吸引力的目标。然而,由于缺乏健壮和可重现的体外培养系统,因此难以靶向和研究这种必不可少的疟疾肝阶段。在这里,我们描述了一种程序,该程序允许使用原代猿猴肝细胞培养和可视化疟疾肝阶段,包括休眠的次生子。这种方法可以对体外不同肝期进行灵敏和定量的评价。

[背景 ] 疟疾是女性的叮咬后传染给人类按蚊蚊子注入子孢子进入血流,其迁移到肝脏和侵入宿主的肝细胞。在肝细胞内部,子孢子进行第一轮无性繁殖并转化为多核肝裂殖体。完全成熟的肝脏裂殖体破裂并释放裂殖子,该裂殖子进入血流并感染红细胞(RBC)。在红细胞内部,寄生虫进行了第二轮无性繁殖,血液阶段的完成最终引起了与疟疾有关的临床症状。例外地,在所有疟原虫物种中,间日疟原虫,食蟹猴和卵圆形疟原虫的子孢子可产生休眠的肝形式,称为次生子孢子(Prudêncioet al。,2011)。

间日疟原虫是第二大主要疟原虫,在包括热带,亚热带和温带气候在内的所有疟疾物种中地理分布更广。消除间日疟原虫疟疾的最大挑战是由休眠的次生子激活引起的周期性疟疾复发,这些休眠的次生子启动了肝阶段增殖的发作(Wells ...

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