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siRNAの非種子領域に対するプラチナの干渉は,シューティング能力を微調整します
Hanna K Hedman1, Finn Kirpekar, Sofi K C Elmroth
1Department of Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
Journal of the American Chemical Society
|July 5, 2011
まとめ
抗がん剤シスプラチンとオクサリプラチンは,小干渉RNA (siRNA) をプラチナ化するために使用されました. プラチナ化はsiRNAの分解を変化させましたが,生物学的活性を維持しましたが,一般的に静止能力が低下し,オキシリプラチンにより大きな効果がありました.
科学分野:
- 分子生物学は分子生物学である.
- RNA干渉 (RNAi) とは
- ドラッグ開発 ドラッグ開発
背景:
- 小さな干渉RNA (siRNA) とマイクロRNA (miRNA) を含む非コーディングRNAは,遺伝子発現の調節において重要な役割を果たします.
- siRNAは遺伝子サイレンシングに使用され,全身の安定性は臨床応用における重要な要因である.
- 化学療法薬のような要因がsiRNAとmiRNAの機能にどのように影響するかを理解することは,特に病理学的状態において不可欠です.
研究 の 目的:
- シスプラチンとオクサリプラチンがsiRNAsの遺伝子静止効果に与える影響を調査する.
- siRNAで形成されるプラチナ-RNAアダクトの特徴と,RNAの安定性と機能に対するその影響について.
- シスプラチンとオキシリプラチンがsiRNAの処理能力とサイレンシング能力に及ぼす影響を比較する.
主な方法:
- Wnt-5a mRNA (NM_003352) をターゲットとする siRNA の構築.
- アンチセンセスのsiRNA鎖をシスプラチンまたはオクサリプラチンでプレプラチン化.
- ゲル電泳とMALDI-MSを用いたプラチナアダクトの検出と特徴付け.
- ルシフェラーゼレポーターシステムを用いてHB2細胞の静音化能力の評価.
主要な成果:
- siRNAのプラチナ化により,分解パターンを変化させるアダクトが生み出され,改変部付近の水解から保護された.
- MALDI-MSは,プラチナの天然の同位体パターンを指紋として利用して,プラチナ化されたRNAを成功裏に特定し,特徴づけました.
- アンチセンセスプラチナ化siRNAは生物学的活性を維持し,プラチナ化部位は重要な種子領域の外にあります.
- プラチナ化siRNAsの静止能力の低下の一般的な傾向が観察されました.
- オキシリプラチンはシスプラチンと比較して,siRNAサイレンシング能力により大きな影響を及ぼしました.
結論:
- 抗癌薬は,siRNAを改変し,その安定性と遺伝子静止能力に影響を与える可能性があります.
- この研究は,プラチナベースの化学療法薬がRNAiメカニズムとの潜在的な干渉に関する洞察を提供します.
- シスプラチンとオクサリプラチンは,siRNAとmiRNAの処理に干渉する能力において微妙な違いがある.
関連する概念動画
RNA 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...
RNA 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...
siRNA - 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...
Experimental 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...
Small 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...
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...
