関連する実験動画

Updated: Oct 15, 2025

Analysis of Cardiomyocyte Development using Immunofluorescence in Embryonic Mouse Heart

Analysis of Cardiomyocyte Development using Immunofluorescence in Embryonic Mouse Heart

Published on: March 26, 2015

CARMNは,進化的に保存された滑らかな筋肉細胞特異のLncRNAであり,ミオカルディン結合によって収縮性フェノタイプを維持する

Kunzhe Dong¹, Jian Shen^1,2, Xiangqin He^1,3

¹Department of Pharmacology and Toxicology (K.D., J.S., X.H., G.H., L.W., I.O., K.M.B., R.D.-M., A.V., D.J.R.F., J.Z.), Medical College of Georgia, Augusta University.

|October 25, 2021

まとめ

CARMNという新しい長い非コードRNAを発見しました滑らかな筋肉細胞に特異的なもので血管の恒常性を維持するのに極めて重要です CARMNの喪失は血管疾患を悪化させ,その回復は治療的可能性を秘めています.

科学分野:

血管生物学
非コーディングRNA研究
心血管疾患

背景:

血管の恒常化は,血管の滑らかな筋肉細胞 (VSMC) に依存する.
タンパク質をコードする遺伝子はよく研究されているが,VSMCにおけるノンコーディング遺伝子の役割はほとんど未知のままである.
これらの非コーディング要素を理解することは血管疾患の治療の鍵です

研究の目的:

VSMCで濃縮された新しいロングノンコーディングRNA (lncRNA) を識別する.
特定のVSMC濃縮 lncRNA,CARMNの機能と治療の可能性を調査する.
CARMNがVSMCフェノタイプを調節する分子メカニズムを解明する.

主な方法:

大規模なRNAシーケンシングデータセットの分析により,VSMC特異のlncRNAを特定する.
CARMN-GFPレポーターマウスモデルの生成と分析
ヒトおよび動物の血管疾患モデルにおける遺伝子ノックダウン/過剰発現および遺伝子ノックアウトモデルを用いたin vitroおよびin vivo機能研究.

主要な成果:

CARMNは,MIR143/145から独立して転写された,保存されたSMC特異のlncRNAとして識別された.
血管疾患のモデルでは,CARMN発現が著しく低下する.
SMC特有のCARMNの消去はネオインティマの形成を悪化させ,過剰発現はそれを弱め,その保護的役割を強調した.

結論:

CARMNは,進化的に保存され,VSMCの収縮性フェノタイプを維持するために不可欠なSMC特有のlncRNAです.
CARMNはミオカルディンと物理的に相互作用し,ミオカルディンの活動を強化する.
CARMNは血管疾患に対する新しい治療目標です.

キーワード:

長い非コーディングRNA 筋細胞,滑らかな筋肉血管疾患

さらに関連する動画

Assessing Cardiomyocyte Subtypes Following Transcription Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts

Assessing Cardiomyocyte Subtypes Following Transcription Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts

Published on: March 22, 2017

Assessment of Myofilament Ca2+ Sensitivity Underlying Cardiac Excitation-contraction Coupling

Assessment of Myofilament Ca2+ Sensitivity Underlying Cardiac Excitation-contraction Coupling

Published on: August 1, 2016

関連する概念動画

Smooth Muscle Contraction

Smooth Muscle Contraction

Smooth muscle contraction is a complex process vital for various bodily functions, from maintaining blood vessel tension to facilitating the movement of food through the digestive tract. Unlike striated muscles, smooth muscle contraction begins more slowly and lasts longer.
The onset of contraction is triggered by an increase in calcium ions within the sarcoplasm, similar to the process in striated muscle. However, smooth muscles have a relatively smaller reservoir of the sarcoplasmic...

Catenins

Catenins

Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the...

The Role of Actin and Myosin in Non-muscle Cells

The Role of Actin and Myosin in Non-muscle Cells

Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They are held...

Structure of Cardiac Muscles

Structure of Cardiac Muscles

Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...

Specialized Characteristics of Cardiac Muscles

Specialized Characteristics of Cardiac Muscles

The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy...

Formation of Muscle Fibers from Myoblasts

Formation of Muscle Fibers from Myoblasts

De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...