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Related Concept Videos

Glycosaminoglycans01:23

Glycosaminoglycans

Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...

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Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
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Hyaluronan hydration generates three-dimensional meso-scale structure in engineered collagen tissues.

Nelomi Anandagoda1, Daniel G Ezra, Umber Cheema

  • 1UCL Institute of Orthopaedics and Musculoskeletal Science, UCL Tissue Repair and Engineering Centre, University College London, Stanmore Campus, London HA7 4LP, UK.

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|May 18, 2012
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Researchers incorporated hyaluronan into collagen to create novel scaffolds. This method precisely controls fluid content, enabling the fabrication of tissue regeneration structures like tubes and spirals.

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Production of Nanofibrillar Patterned Collagen for Tissue Engineering
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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biophysics

Background:

  • Collagen is a primary structural protein in connective tissues.
  • Controlling fluid content in collagen networks is crucial for scaffold fabrication.
  • Hyaluronan is a naturally occurring, osmotically active macromolecule found in connective tissues.

Purpose of the Study:

  • To investigate the effect of incorporating osmotically active hyaluronan into compressed collagen constructs.
  • To determine if hyaluronan can control local fluid content within dense collagen networks.
  • To explore the potential for fabricating novel scaffolds for tissue regeneration.

Main Methods:

  • Local incorporation of hyaluronan into pre-compressed collagen gels.
  • Observation and analysis of structural changes at the nano-micro scale.
  • Fabrication of scaffold prototypes such as tubes and open-spirals.

Main Results:

  • Rapid dehydration and compression of collagen layers upon hyaluronan incorporation.
  • Formation of channels and new interfaces within the collagen matrix.
  • Predictable spatial arrangement of structures at the meso-scale.
  • Successful fabrication of tubular and spiral scaffolds.

Conclusions:

  • Local hyaluronan incorporation offers a novel method for precise control over collagen construct architecture.
  • The developed technique enables the fabrication of meso-scale scaffolds with potential applications in tissue regeneration.
  • These constructs may serve as in vitro models for studying developmental and pathological processes.