相关实验视频
Updated: Jun 4, 2025

08:31
Porous Silicon Microparticles for Delivery of siRNA Therapeutics
Published on: January 15, 2015
10.9K
对于siRNA向固体瘤提供一个简单而有前途的交付平台
Qixin Leng1, Aishwarya Anand1, A James Mixson1
1Department of Pathology, University of Maryland School of Medicine, 10 S. Pine St., Baltimore, MD 21201, USA.
Molecules (Basel, Switzerland)
|December 17, 2024
概括
简单的线性载体有效地将小干扰RNA (siRNA) 传递给瘤,为肝外基因沉默和潜在的癌症疗法提供了一个有希望的新策略.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 小干扰RNA (siRNA) 具有治疗疾病的潜力,但对肝外位的系统性输送仍然具有挑战性.
- 目前FDA批准的siRNA疗法主要针对肝脏,经常使用复杂的载体进行肝外应用.
- 现有载体的复杂性阻碍了siRNA在治疗肝脏以外疾病的广泛临床使用.
研究的目的:
- 开发和评估一种简单,有效的线性载体,用于系统性siRNA向肝外瘤输送.
- 评估histidine-lysine (HK) -siRNA多重复体在静止瘤特异性基因表达中的有效性.
- 为了研究简短的浴室声波对HK siRNA多重复合体的沉默效率的影响.
主要方法:
- 在患有MDA-MB-435瘤的小鼠模型中,系统静脉注射线性丁-氨酸 (HK) -siRNA多复合体.
- 通过测量瘤中的光酶活性来评估基因沉默.
- 对含有 -KHHK-序列的各种线性的选,以确定siRNA传递效率.
- 在第二种瘤模型 (MDA-MB-231异种移植) 中证实了沉默,并评估了瘤基因 (Raf-1) 的减少.
主要成果:
- 线性HK-siRNA复合体在MDA-MB-435瘤中有效地沉默了露西法酶表达.
- 简短的浴室超声波显著增强了体外和体内静音.
- 查发现了几种具有 -KHHK - 序列的线性,可以使高达80%的瘤光酶标记物沉默.
- 在第二种瘤模型中证实了沉默作用, luciferase 活性和 Raf-1 瘤基因表达均显著降低.
结论:
- 简单,易于合成的线性HK是系统性siRNA传递到肝外瘤的有效载体.
- 这些HK siRNA复合体在临床前模型中显示出显著的基因沉默能力,包括瘤基因减少.
- 开发的HK载体对未来临床应用在治疗癌症等肝外疾病方面非常有前途.
相关概念视频
siRNA - Small Interfering RNAs
16.6K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
16.6K
Experimental RNAi
6.0K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.0K

