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Related Concept Videos

Stem Cell Niche01:26

Stem Cell Niche

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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...
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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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Related Experiment Video

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Construction of a Multilayered Mesenchymal Stem Cell Sheet with a 3D Dynamic Culture System
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Construction of a Multilayered Mesenchymal Stem Cell Sheet with a 3D Dynamic Culture System

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Stacked stem cell sheets enhance cell-matrix interactions.

Nikul G Patel1, Ge Zhang1

  • 1Department of Biomedical Engineering; The University of Akron; Akron, OH USA.

Organogenesis
|April 29, 2014
PubMed
Summary
This summary is machine-generated.

A new micropipette method simplifies handling fragile cell sheets for cardiac repair. This technique improves stem cell delivery and integration, overcoming key challenges in cell sheet technology for clinical applications.

Keywords:
cell sheetcell-matrix interactionsfibrinmesenchymal stem cells

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Cell sheet engineering offers a promising strategy for cardiac repair by enabling high-density stem cell delivery via cardiac patches.
  • A major limitation of cell sheet technology is the fragility of individual cell sheets, hindering effective handling, transfer, and stacking.
  • Current methods face challenges in preserving cell sheet integrity during manipulation for clinical applications.

Purpose of the Study:

  • To develop a simple and effective micropipette-based method for facile cell sheet transfer and stacking.
  • To evaluate the viability of cells after transfer using the developed method.
  • To fabricate multi-layer stem cell sheets and investigate their interaction with a fibrin matrix.

Main Methods:

  • Development of a novel micropipette-assisted technique for cell sheet harvesting and manipulation.
  • Assessment of cell viability post-transfer using standard assays.
  • Fabrication of multi-layered cell sheets and their co-culture with fibrin matrix.
  • Analysis of cell sheet-fibrin matrix interactions, including adherence and matrix degradation.

Main Results:

  • The developed micropipette method successfully facilitated the transfer and stacking of fragile cell sheets.
  • High cell viability was maintained after the transfer process.
  • Multi-layer stem cell sheets were fabricated, demonstrating enhanced adherence to the fibrin matrix.
  • The presence of extracellular matrix (ECM) on detached cell sheets promoted adherence and interaction with the fibrin matrix, leading to accelerated fibrin degradation.

Conclusions:

  • The micropipette-based method provides a simple and effective solution for handling and stacking cell sheets, addressing a critical challenge in cell sheet technology.
  • Preserved ECM on cell sheets significantly enhances their integration with fibrin matrices, crucial for cardiac patch applications.
  • This technique holds potential for advancing high-density stem cell delivery strategies for cardiac repair and other regenerative medicine applications.