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Related Concept Videos

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...
Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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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A Self-Assembled Matrix System for Cell-Bioengineering Applications in Different Dimensions, Scales, and Geometries.

Yong Xu1, Michelle Patino Gaillez1, Kai Zheng2

  • 1B CUBE Center for Molecular Bioengineering, Technische Universität Dresden, 01307, Dresden, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|February 8, 2022
PubMed
Summary

A novel self-assembling biomatrix system supports human mesenchymal stromal cell (hMSC) culture, osteogenesis, and bioengineering applications. This versatile material is useful in 2D, 3D, and bioprinting, advancing stem cell therapy development.

Keywords:
3D printingbioactive glass scaffoldscell-bioengineeringextracellular matrixinjectable hydrogelsself-assembled matrix

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Area of Science:

  • Biomaterials Science
  • Stem Cell Biology
  • Tissue Engineering

Background:

  • Stem cell bioengineering and therapy necessitate adaptable model systems and materials.
  • A unified, chemically defined biomatrix can reduce variability across different experimental setups.

Purpose of the Study:

  • To identify an optimal biomatrix for 2D human mesenchymal stromal cell (hMSC) culture and osteogenesis.
  • To demonstrate the utility of this biomatrix in various bioengineering applications, including scaffold coating, gene delivery, and 3D culture.

Main Methods:

  • Coacervation-mediated self-assembly was used to synthesize and screen biomaterials.
  • The identified biomatrix was tested for 2D hMSC culture, osteogenesis, bioactive glass scaffold coating, nanoparticle synthesis for gene silencing (SOX-9), 3D cell culture, co-culture models (hMSC/HUVEC), and 3D bioprinting.

Main Results:

  • A biomatrix optimal for 2D hMSC culture and osteogenesis was identified.
  • The biomatrix facilitated hMSC bioengineering, including coating bioactive glass scaffolds and efficient esiRNA delivery for SOX-9 gene knockdown.
  • The system supported 3D cell culture, angiogenesis models, 3D bioprinting, and induced apatite crystal formation on bioactive glass scaffolds, mimicking bone structures.

Conclusions:

  • The self-assembled biomatrix system is versatile for diverse bioengineering applications across different dimensions, scales, and geometries.
  • This system holds significant potential for advancing stem cell therapy and tissue regeneration strategies.