相关实验视频

Updated: Jul 25, 2025

Polyethyleneimine-coated Iron Oxide Nanoparticles as a Vehicle for the Delivery of Small Interfering RNA to Macrophages In Vitro and In Vivo

Polyethyleneimine-coated Iron Oxide Nanoparticles as a Vehicle for the Delivery of Small Interfering RNA to Macrophages In Vitro and In Vivo

Published on: February 5, 2019

脂质纳米粒子介导的miRNA模拟物到髓状细胞的传递

Elaine Kang¹, Marcin Kortylewski²

¹Department of Immuno-Oncology; Beckman Research Institute at City of Hope, Duarte, CA, USA.

Methods in molecular biology (Clifton, N.J.)

|June 24, 2023

概括

研究人员开发了一种脂质纳米粒子 (LNP) 传递系统,用于微RNA模仿物,特别是miR146a,以准髓状免疫细胞. 这种策略有效地减少炎症,并显示出治疗免疫系统疾病和血液癌症的前景.

科学领域:

免疫学免疫学免疫学
分子生物学分子生物学
纳米技术纳米技术

背景情况:

微RNA (miRNA) 失调与癌症和免疫系统疾病等疾病有关.
MiR146a是免疫反应和细胞存活的关键调节者,通过抑制核因子-卡帕B (NF-B) 信号传递.
恢复miR146a水平为免疫过活和某些血液癌症提供了治疗方法,但输送仍然是一个挑战.

研究的目的:

开发和优化脂纳米颗粒 (LNP) 传递系统,以模仿针对髓状免疫细胞的miRNA.
鉴定LNP复合体的特征,并在体外评估它们的生物活性.
为了证明LNP封装的miR146a作为免疫调节的治疗策略的潜力.

主要方法:

合成miR146a的封装在优化的脂质纳米粒子 (LNP) 中模拟.
对稳定性和miRNA保护的LNP复合物的表征.
在实验室中评估LNP介导的分娩和小鼠巨细胞中的生物活性.
目标蛋白和细胞因子表达 (IRAK1,TRAF6,IL-6) 和NF-B活性的量化.

主要成果:

这种LNP有效地封装并保护miR146a免受降解.
观察到目标髓状免疫细胞迅速吸收LNP-miR146a.
有效抑制IRAK1和TRAF6蛋白表达,导致NF-B活性降低.
显著降低了促炎媒介IL-6的表达.

结论:

一个优化的LNP策略能够有效地将miRNA模仿物传递给髓状免疫细胞.
用LNP封装的miR146a通过抑制NF-B信号传递,成功调节免疫反应.
这种基于LNP的平台可适应将其他RNA疗法传递到髓状细胞,用于各种疾病应用.

关键词:

炎症炎症是一种炎症.脂质纳米颗粒的使用方法这是一个微型RNA.NF-BB 这是一个很好的方法.有氧核酸类的在 miR-146a 里面.

更多相关视频

Delivery of Exogenous Artificially Synthesized miRNA Mimic to the Kidney Using Polyethylenimine Nanoparticles in Several Kidney Disease Mouse Models

Delivery of Exogenous Artificially Synthesized miRNA Mimic to the Kidney Using Polyethylenimine Nanoparticles in Several Kidney Disease Mouse Models

Published on: May 10, 2022

Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy

Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy

Published on: June 21, 2013

相关概念视频

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...