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Related Concept Videos

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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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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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
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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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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Related Experiment Video

Updated: Dec 24, 2025

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
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Collagen structure regulates MSCs behavior by MMPs involved cell-matrix interactions.

Yilu Ni1, Zhurong Tang, Jirong Yang

  • 1National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China. linhai028@scu.edu.cn.

Journal of Materials Chemistry. B
|April 8, 2020
PubMed
Summary
This summary is machine-generated.

Methacrylated collagen (CMA) hydrogels promote better mesenchymal stem cell (MSC) behaviors than gelatin (GMA) hydrogels. Appropriate degradation by matrix metalloproteinases (MMPs) is crucial for enhancing cell adhesion and proliferation within these biomaterials.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Cell Biology

Background:

  • Collagen is a promising biomaterial for tissue engineering, but its interactions with mesenchymal stem cells (MSCs) require further investigation.
  • Understanding cell-matrix interactions is crucial for designing effective tissue scaffolds that regulate MSC behavior.

Purpose of the Study:

  • To investigate the impact of methacrylated collagen (CMA) and gelatin (GMA) hydrogels on MSC behavior.
  • To elucidate the role of matrix metalloproteinases (MMPs) and their inhibitors in MSC-biomaterial interactions.

Main Methods:

  • Preparation and characterization of photo-crosslinkable CMA and GMA hydrogels.
  • In vitro culture of MSCs within hydrogels with or without tissue inhibitor of metalloproteinases (TIMP).
  • Assessment of cell proliferation (CCK-8), morphology (CLSM), gene expression (qRT-PCR), protein levels, and immunofluorescence staining.

Main Results:

  • CMA hydrogels supported superior MSC spreading and proliferation compared to GMA hydrogels.
  • TIMP inhibited MMPs, leading to reduced MSC adhesion and proliferation, indicating the importance of appropriate degradation.
  • Vitronectin distribution was significantly correlated with MMP-1 and MMP-2 activity.

Conclusions:

  • Differences in the advanced structures of collagen and gelatin hydrogels significantly influence MSC-matrix interactions.
  • Controlled degradation by MMPs is essential for creating bioactive domains and improving the MSC microenvironment.
  • Scaffold material structure dictates cellular fate through modulation of cell-matrix interactions.