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Related Concept Videos

The Extracellular Matrix01:29

The Extracellular Matrix

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...
The Extracellular Matrix01:42

The Extracellular Matrix

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 MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.
Stem Cell Niche01:26

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
Extracellular Matrix01:26

Extracellular Matrix

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...
Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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 access...
Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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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Human Pluripotent Stem Cell Culture on Polyvinyl Alcohol-Co-Itaconic Acid Hydrogels with Varying Stiffness Under Xeno-Free Conditions
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Intrinsic extracellular matrix properties regulate stem cell differentiation.

Gwendolen C Reilly1, Adam J Engler

  • 1Department of Engineering Materials, The Kroto Research Institute, University of Sheffield, S3 7HQ, UK.

Journal of Biomechanics
|October 6, 2009
PubMed
Summary
This summary is machine-generated.

Stem cells differentiate into tissue cells influenced by the extracellular matrix (ECM). Understanding stem cell mechanobiology and biomimetic scaffolds is key for therapeutic applications.

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Area of Science:

  • Stem cell biology
  • Biomaterials science
  • Mechanobiology

Background:

  • The extracellular matrix (ECM) plays a crucial role in stem cell differentiation.
  • ECM properties like structure, elasticity, and composition influence cell behavior.
  • Mechano-sensitive pathways convert biophysical cues from the ECM into biochemical signals for lineage commitment.

Purpose of the Study:

  • To explore the emerging field of stem cell mechanobiology.
  • To discuss the challenges and therapeutic potential of biomimetic scaffolds in guiding stem cell differentiation.
  • To highlight the dynamic and morphogenetic role of ECM parameters in development.

Main Methods:

  • Review of current literature on stem cell mechanobiology.
  • Discussion of biomimetic, three-dimensional scaffolds.
  • Analysis of how ECM properties modulate cell forces and signaling pathways.

Main Results:

  • ECM properties dynamically regulate stem cell differentiation, similar to growth factors.
  • Spatial and temporal control of ECM parameters suggests a morphogenetic role.
  • Biomimetic scaffolds offer a way to mimic the stem cell niche for therapeutic purposes.

Conclusions:

  • Dynamically regulating the stem cell niche is critical for therapeutic applications.
  • Stem cell mechanobiology is a rapidly advancing field with significant therapeutic promise.
  • Biomimetic scaffolds are emerging as a key technology for regenerative medicine.