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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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Microgel-Extracellular Matrix Composite Support for the Embedded 3D Printing of Human Neural Constructs
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Published on: May 5, 2023

Hydrogels derived from central nervous system extracellular matrix.

Christopher J Medberry1, Peter M Crapo, Bernard F Siu

  • 1Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA.

Biomaterials
|November 20, 2012
PubMed
Summary
This summary is machine-generated.

Injectable hydrogels derived from central nervous system extracellular matrix (CNS-ECM) show promise for repairing neurological damage. These novel CNS-ECM hydrogels support neural growth and may aid in reconstructing complex brain and spinal cord injuries.

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Area of Science:

  • Biomaterials Science
  • Neuroscience
  • Tissue Engineering

Background:

  • Biologic scaffolds from extracellular matrix (ECM) are used in tissue repair, but their application in nervous system repair is limited.
  • Existing brain and spinal cord ECM scaffolds have conformational limitations, restricting their therapeutic use.
  • Injectable hydrogels offer potential for reconstructing irregular lesion geometries in the central nervous system (CNS).

Purpose of the Study:

  • To develop injectable hydrogel forms of brain and spinal cord ECM.
  • To compare the biochemical composition, mechanical properties, and neurotrophic potential of CNS-ECM hydrogels versus a non-CNS-ECM hydrogel (urinary bladder matrix).

Main Methods:

  • Development of hydrogels from brain ECM and spinal cord ECM.
  • Characterization of biochemical composition and rheologic properties.
  • Assessment of neurotrophic potential using a brain-derived cell line and evaluation of neurite outgrowth in 3D culture.

Main Results:

  • Significant differences in biochemical composition were observed between brain ECM, spinal cord ECM, and urinary bladder matrix hydrogels.
  • Spinal cord ECM hydrogel exhibited a higher rheologic modulus compared to brain ECM and urinary bladder matrix hydrogels.
  • All tested ECM hydrogels promoted neurite outgrowth; brain ECM specifically enhanced neurite length, suggesting tissue-specific effects.

Conclusions:

  • CNS-ECM hydrogels can be developed into injectable forms with distinct properties.
  • These hydrogels demonstrate neurotrophic potential, supporting neurite outgrowth.
  • CNS-ECM hydrogels hold promise as supportive scaffolds for promoting in vivo axonal repair in the central nervous system.