ナノ構造ガイロイド立方脂質マトリックスに埋め込まれたsiRNAの非常に効率的な遺伝子静止活性
Cecília Leal1, Nathan F Bouxsein, Kai K Ewert
1Physics, Materials, and Molecular, Cellular & Developmental Biology Departments, University of California, Santa Barbara, California 93106, United States. cecilial@mrl.ucsb.edu
Journal of the American Chemical Society
|October 30, 2010
まとめ
研究者らは,ユニークな立方ナノ構造を持つ新しいカチオン性リポソーム-小干渉RNA (CL-siRNA) コンプレックスを開発した. これらの複合体は,効率的な遺伝子サイレンシングを提供し,脂質有毒性が低下し,RNA干渉 (RNAi) 治療を推進します.
科学分野:
- バイオテクノロジー バイオテクノロジー
- 分子生物学は分子生物学である.
- マテリアルサイエンス 材料科学
背景:
- RNA干渉 (RNAi) は,重要な遺伝子サイレンシング経路である.
- カチオン型リポソーム-siRNA (CL-siRNA) 複合体は,siRNAの配送に使用されます.
- 現在のCL-siRNA方法は,効率性と脂質毒性に関する課題に直面しています.
研究 の 目的:
- 伝達効率の向上と毒性の低下を伴う新しいCL-siRNA複合体を開発する.
- CL-siRNA複合体のナノ構造とその遺伝子サイレンシングへの影響について調査する.
- 新しいナノ構造によって媒介される強化された遺伝子サイレンシングのメカニズムを理解するために.
主な方法:
- 新しい立方相ナノ構造を持つCL-siRNA複合体の開発.
- シンクロトロンX線散射により,逆バイコンティヌアジロイド立方ナノ構造が確認されました.
- 複合体内の脂質とsiRNAのコロカライゼーションを視覚化するための光顕微鏡.
主要な成果:
- 新型CL-siRNA複合体は,低毒性で効率的な遺伝子サイレンシングを示した.
- 逆バイコンティヌーヴ・ギロイド立方ナノ構造が確認されました.
- 複合体とエンドソーム膜の融合が強化され,立方相の正のガウスのモジュールに起因することが観察されました.
結論:
- 立方ナノ構造を持つ開発されたCL-siRNA複合体は,効率的で安全な遺伝子サイレンシングの有望性を示しています.
- 立方相膜の正のガウス模数は,膜融合と孔形成を容易にする.
- ナノ構造と膜の相互作用を理解することは,効果的なCLベースの遺伝子サイレンシングベクトルの設計に不可欠です.
さらに関連する動画
08:53Synthesis, Functionalization, and Characterization of Fusogenic Porous Silicon Nanoparticles for Oligonucleotide Delivery
Published on: April 16, 2019
11:53Predicting Gene Silencing Through the Spatiotemporal Control of siRNA Release from Photo-responsive Polymeric Nanocarriers
Published on: July 21, 2017
関連する概念動画
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...
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...
02:30Small 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...
01:22MicroRNAs
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...
01:22MicroRNAs
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 ends...