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Related Concept Videos

Extracellular Matrix01:26

Extracellular Matrix

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Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
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The Extracellular Matrix01:42

The Extracellular Matrix

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The Extracellular Matrix01:29

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In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
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Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
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Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Connective Tissue Fibers and Ground Substance01:17

Connective Tissue Fibers and Ground Substance

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One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...
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Cardio-Vascular Extracellular Matrix: The Unmet Enigma.

Ioannis Paraskevaidis1,2, Elias Tsougos2, Christos Kourek1

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The cardiac extracellular matrix (ECM) is crucial for heart health and disease. Disruptions in ECM lead to fibrosis, impairing heart function and causing heart failure, necessitating new diagnostic and therapeutic strategies.

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Area of Science:

  • Cardiovascular Biology
  • Biomedical Engineering
  • Pathology

Background:

  • The cardiac extracellular matrix (ECM) is a dynamic scaffold vital for heart development and function.
  • Previously viewed as structural, ECM actively regulates cardiac signaling and remodeling.
  • ECM composition changes throughout life and is implicated in cardiovascular disease.

Purpose of the Study:

  • To review the role of the cardiac ECM in cardiovascular physiology and pathology.
  • To highlight ECM's involvement in myocardial fibrosis and heart failure.
  • To discuss current and emerging diagnostic and therapeutic strategies targeting ECM.

Main Methods:

  • Literature review of cardiac ECM biology, focusing on its role in homeostasis and disease.
  • Analysis of ECM's contribution to myocardial fibrosis and its clinical implications.
  • Evaluation of diagnostic advancements and therapeutic approaches for ECM remodeling.

Main Results:

  • ECM is an active regulator of cardiac mechanical, electrical, and biochemical signaling.
  • Pathological stimuli disrupt ECM homeostasis, leading to fibrosis and impaired cardiac function.
  • ECM alterations show age- and sex-specific patterns influencing disease susceptibility.

Conclusions:

  • The cardiac ECM plays a central role in cardiovascular health and disease.
  • Myocardial fibrosis, driven by ECM remodeling, is a key factor in heart failure.
  • Targeted diagnostic and therapeutic innovations for ECM remodeling are needed.