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Related Concept Videos

The Extracellular Matrix01:29

The Extracellular Matrix

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Overview
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

The Extracellular Matrix

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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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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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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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Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

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Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
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Related Experiment Video

Updated: Jan 16, 2026

Rapid and Refined CD11b Magnetic Isolation of Primary Microglia with Enhanced Purity and Versatility
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Making tracks: microglia and the extracellular matrix.

Lauren K Wareham1, David J Calkins2

  • 1Department of Ophthalmology and Visual Sciences, Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, TN, 37212, USA.

Molecular Neurodegeneration
|September 30, 2025
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Microglia interact with the central nervous system

Keywords:
BiomechanicsBlood-brain barrierCell motilityExtracellular matrixMechanotransductionMicrogliaNeurodegeneration

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Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Microglia are key immune cells in the central nervous system (CNS), maintaining neural homeostasis.
  • The extracellular matrix (ECM) significantly influences microglial functions in health and disease.
  • The CNS ECM comprises distinct compartments: interstitial matrix, basement membranes, and perineuronal nets.

Purpose of the Study:

  • To review how microglia interact with and remodel the CNS ECM.
  • To explore the concept of the microglial-ECM interactome.
  • To understand the role of microglial-ECM interactions in aging and neurodegenerative diseases.

Main Methods:

  • Literature review of microglial-ECM interactions.
  • Analysis of ECM composition and microglial responses.
  • Discussion of pathological alterations in the microglial-ECM interactome.

Main Results:

  • Microglia dynamically engage with and remodel the ECM for surveillance and response.
  • The microglial-ECM interactome is a critical interface for sensing and modifying the environment.
  • Dysregulation of this interactome in aging and disease leads to aberrant mechanotransduction and inflammation.

Conclusions:

  • Understanding microglial-ECM interactions is crucial for deciphering neurodegeneration.
  • Aberrant microglial-ECM crosstalk contributes to neurovascular and synaptic dysfunction.
  • Targeting the microglial-ECM interactome may offer therapeutic strategies for CNS disorders.