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Related Concept Videos

The Extracellular Matrix01:29

The Extracellular Matrix

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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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The Extracellular Matrix01:42

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Extracellular Matrix01:26

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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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Role of Matrix Metalloproteases in Degradation of ECM01:23

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Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult...
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Cell-matrix's Response to Mechanical Forces01:13

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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

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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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Remodelling the extracellular matrix in development and disease.

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  • 11] Department of Anatomy, University of California, 513 Parnassus Avenue, San Francisco, California 94143-0452, USA. [2] Oncology Department, INSERM U661, Functional Genomic Institute, 141 rue de la Cardonille, 34094 Montpellier, France.

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The extracellular matrix (ECM) remodels dynamically, influencing cell functions and organ development. Understanding ECM changes is key to treating diseases like fibrosis and cancer.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Cell Biology
  • Tissue Engineering

Background:

  • The extracellular matrix (ECM) is a dynamic tissue component essential for cellular functions.
  • ECM remodelling involves enzymatic degradation and is vital for organ development.

Purpose of the Study:

  • To elucidate the role of ECM remodelling in organogenesis and disease.
  • To highlight the significance of ECM structure and dynamics in physiological and pathological processes.

Main Methods:

  • Enzyme-mediated degradation of ECM components.
  • Analysis of ECM's role in tissue morphogenesis (intestine, lungs, glands).

Main Results:

  • ECM remodelling regulates cell proliferation, migration, and differentiation.
  • Dysregulation of ECM contributes to fibrosis and invasive cancer.

Conclusions:

  • A comprehensive understanding of ECM dynamics and its role in disease is crucial.
  • Targeting ECM remodelling pathways offers potential for novel therapeutic strategies.