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Related Concept Videos

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. 
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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.
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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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Cell Migration01:19

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Related Experiment Video

Updated: Mar 15, 2026

Preparation of Tunable Extracellular Matrix Microenvironments to Evaluate Schwann Cell Phenotype Specification
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Tunable Crosslinked Cell-Derived Extracellular Matrix Guides Cell Fate.

Ramesh Subbiah1,2, Mintai P Hwang3, Ping Du1,2

  • 1Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.

Macromolecular Bioscience
|August 26, 2016
PubMed
Summary

Researchers developed a tunable cell-derived extracellular matrix (ECM) platform using genipin crosslinking. This biomaterial mimics the natural microenvironment, enabling better studies of stem cell differentiation and tissue engineering.

Keywords:
ECM stiffnesscell differentiationextracellular matrixgenipin cross-linkingmechanotransduction

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Stem Cell Biology

Background:

  • The extracellular matrix (ECM) provides crucial biochemical and biophysical cues for cell behavior.
  • Current reductionist platforms using ECM proteins on polymers do not fully replicate the natural microenvironment's complexity.
  • Understanding microenvironmental influences on stem cell differentiation is vital for regenerative medicine.

Purpose of the Study:

  • To develop and characterize a tunable, cell-derived ECM platform.
  • To investigate the impact of varying ECM crosslinking density on its physiomechanical properties.
  • To evaluate the effects of these tunable ECMs on human mesenchymal stem cell differentiation, vascular morphogenesis, and cardiomyogenesis.

Main Methods:

  • Utilized genipin (GN) at varying concentrations (0-2% w/v) to crosslink cell-derived ECM.
  • Quantified changes in ECM stiffness, roughness, and amine content based on GN concentration.
  • Assessed human mesenchymal stem cell differentiation, vascular morphogenesis, and cardiomyogenesis on the engineered ECM platforms.

Main Results:

  • Genipin crosslinking modulated ECM stiffness from <0.1 kPa to 9.4 kPa and roughness from 96 nm to 280 nm.
  • ECM amine content decreased from 100% to 60% with increasing genipin concentration.
  • Distinct cellular responses were observed on ECMs with varying crosslinking densities, influencing stem cell fate and tissue development.

Conclusions:

  • Tunable crosslinking of cell-derived ECM provides a more comprehensive physiological platform than traditional methods.
  • This platform effectively recapitulates aspects of the native microenvironment for studying cell behavior.
  • The developed cell-derived ECM platform holds significant promise for future tissue engineering applications.