一种基于siRNA的杀菌剂可以保护小鼠免受致命的简单疹病毒2感染
Deborah Palliser1, Dipanjan Chowdhury, Qing-Yin Wang
1CBR Institute for Biomedical Research, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|November 25, 2005
概括
针对简单疹病毒2 (HSV-2) 的小干扰RNAs (siRNAs) 提供了一个有前途的新型杀菌剂. 这些siRNAs的阴道应用保护了小鼠免受致命的HSV-2感染,这表明有可能预防病毒传播.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 简单疹病毒2 (HSV-2) 感染导致显著的发病率,是艾滋病毒传播的辅因子.
- 预防HSV-2性传播的杀菌剂可以帮助控制艾滋病毒的传播.
- RNA干扰 (RNAi) 是一种天然的抗病毒防御机制,具有治疗应用的潜力.
研究的目的:
- 调查针对HSV-2的小干扰RNAs (siRNAs) 的阴道灌注在预防感染方面的有效性.
- 评估小鼠阴道中siRNAs对基因沉默的安全性和持续时间.
- 评估基于siRNA的杀菌剂在预防病毒传播方面的潜力.
主要方法:
- 针对小鼠的HSV-2 UL27和UL29基因的siRNAs的阴道灌注.
- 评估阴道和宫外细胞的siRNA吸收.
- 在体内对基因沉默的有效性和持续时间的评估.
- 监测炎症反应和对干扰素有反应的基因.
- 测试对致命的HSV-2病毒进行保护的挑战.
主要成果:
- 针对HSV-2的siRNAs的阴道灌注保护小鼠免受致命感染.
- siRNAs被阴道和宫外细胞有效吸收,使基因表达沉默至少9天.
- 施用siRNA被很好地容忍,没有诱导干扰素反应基因或炎症.
- 当siRNAs在HSV-2挑战之前和/或之后被使用时,观察到保护.
结论:
- 通过阴道输送的siRNAs有效地保护小鼠免受致命的HSV-2感染.
- siRNAs在阴道粘膜中显示出有利的安全性和长时间的基因沉默.
- 基于siRNA的杀菌剂是预防HSV-2感染和传播的有希望的策略,可能会影响艾滋病毒的传播.
相关概念视频
01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
02:30siRNA - Small Interfering RNAs
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 ATP-dependent...
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 ATP-dependent...
02:15Experimental RNAi
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...
02:30Small interfering RNAs (siRNA)
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 ATP-dependent...
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 ATP-dependent...