単細胞RNA配列解析による心臓非コードトランスクリプトームの評価FIXER,保存されたプロフィブロゲン長い非コードRNAを特定
Parisa Aghagolzadeh1, Isabelle Plaisance1, Riccardo Bernasconi1
1Experimental Cardiology Unit, Division of Cardiology, Department of Cardiovascular Medicine, University of Lausanne Medical School, Switzerland (P.A., I.P., R.B., M.N., T.P.).
Circulation
|July 10, 2023
まとめ
研究者は心臓線維症を誘発する 新種の長い非コードRNAであるFIXERを特定しました 心臓発作後の心臓の機能を改善し,心臓病の新たな治療目標となる.
科学分野:
- 心血管生物学
- 分子心臓科
- ゲノミクス
背景:
- 心臓の繊維細胞は損傷した心臓組織でミオフィブロブラストに微分化し,繊維症と機能障害を引き起こす.
- ミオフィブロブラストは治療対象ですが,特定のマーカーの欠如は治療の開発を妨げます.
- 長い非コーディングRNA (lncRNAs) は細胞特異性があり,心臓血管機能に不可欠です.
研究 の 目的:
- 単細胞RNA配列解析における lncRNAトランスクリプトームの潜在能力を評価し,心臓細胞サブ集団を特定する.
- 心臓病の治療対象となる 新規のサブ集団特有のマーカーを発見する.
主な方法:
- 心臓の非筋細胞の深層単細胞RNA配列解析
- フィブロブラストとミオフィブロブラストの集団における異質性を特定するために,lncRNAトランスクリプトームのプロファイリング.
- 候補 lncRNA,FIXER の選択と機能的検証
主要な成果:
- 単細胞の研究では,lcRNA発現のみによって心臓細胞のアイデンティティを定義することができます.
- 特定されたlncRNAは,ミオフィブロブラストのサブ集団に特異的に濃縮されています.
- lncRNA FIXER (繊維性LOXロカス強化RNA) の静止は心臓線維症を軽減し,心臓発作後の心臓機能を改善しました.
- FIXERはCBX4と相互作用し,RUNX1の発現を調節し,繊維性遺伝子プログラムを制御する.
結論:
- lncRNA発現は哺乳類の心臓の細胞タイプを定義するのに十分である.
- 心筋線維症に対する有望な治療標的としてFIXERを特定した.
- FIXERはヒトに保存されていて,心臓病の治療におけるトランスレーションの可能性を示しています.
関連する概念動画
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
lncRNA - Long Non-coding RNAs
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA (lncRNA)...
Ribosome Profiling
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...
Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
lncRNA - Long Non-coding RNAs
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA (lncRNA)...


