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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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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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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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Role of Matrix Metalloproteases in Degradation of ECM01:23

Role of Matrix Metalloproteases in Degradation of ECM

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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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The Tumor Microenvironment02:17

The Tumor Microenvironment

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Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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Updated: Aug 15, 2025

A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces
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Macrophage response mediated by extracellular matrix: recent progress.

Wenlan Xiao1,2, Yang Yang1,2, Chenyu Chu1,2

  • 1Department of Oral Implantology & Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China.

Biomedical Materials (Bristol, England)
|January 3, 2023
PubMed
Summary
This summary is machine-generated.

Extracellular matrix (ECM) scaffolds promote tissue regeneration by modulating immune cells, particularly macrophages. Understanding these interactions is key for developing advanced biomaterials in regenerative medicine.

Keywords:
extracellular matrixmacrophagespolarizationregenerative medicine

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A Rapid, Scalable Method for the Isolation, Functional Study, and Analysis of Cell-derived Extracellular Matrix
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Area of Science:

  • Biomaterials Science
  • Immunology
  • Regenerative Medicine

Background:

  • Biomaterials are crucial for treating tissue defects in regenerative medicine.
  • Extracellular matrix (ECM) scaffolds offer advantages over synthetic materials by promoting a pro-regenerative immune environment.
  • Macrophages play a critical role in host response to biomaterials and influence tissue healing outcomes.

Purpose of the Study:

  • To review the latest literature on the immune microenvironment mediated by ECM scaffolds.
  • To describe the behavior of heterogeneous macrophage subpopulations in response to ECM scaffolds.
  • To discuss the mechanisms of ECM scaffold interaction with macrophages for therapeutic modulation.

Main Methods:

  • Literature review of studies investigating immune responses to ECM scaffolds.
  • Analysis of macrophage heterogeneity and plasticity using high-resolution techniques like single-cell sequencing.
  • Examination of ECM composition (ultrastructure, nucleic acids, proteins, proteoglycans).

Main Results:

  • ECM scaffolds can induce a pro-regenerative immune microenvironment, contrasting with synthetic materials.
  • Macrophage subpopulations exhibit diverse phenotypes and functions influencing tissue regeneration.
  • ECM scaffold properties (composition, ultrastructure) dictate interactions with macrophages.

Conclusions:

  • ECM scaffolds represent a promising biomaterial strategy for regenerative medicine.
  • Targeting macrophage behavior through ECM scaffold modulation offers therapeutic potential.
  • Further research into ECM-macrophage interactions will advance wound healing and tissue repair strategies.