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  4. Development of affinity-based delivery of NGF from a chondroitin sulfate biomaterial

Development of affinity-based delivery of NGF from a chondroitin sulfate biomaterial

Biomatter, 2011 · DOI: http://dx.doi.org/10.4161/biom.1.2.18791 · Published: October 1, 2011

PharmacologyRegenerative MedicineBiomedical

Simple Explanation

This study explores the use of chondroitin sulfate (CS) and a novel CS-binding peptide to control the release of nerve growth factor (NGF) from biomaterials. The research focuses on promoting neurite extension through CS-rich matrices and synthetic scaffolds, which are essential for nerve regeneration. The novel CS-binding peptide enhances the controlled release properties of the CS gels. The introduction of CS into a scaffold inhibits primary cortical outgrowth, but the combination of CS, CS-binding peptide, and NGF promotes primary cortical neurite outgrowth in CS gels. This affinity-based system that incorporates C6S and NGF is an ideal biomaterial for studying neural development and for neural tissue engineering.

Study Duration
Not specified
Participants
Primary cortical neurons
Evidence Level
Not specified

Key Findings

  • 1
    PEG gels that contained only C6S (PEG-C6S) had the fastest NGF release, while gels that contained both BP and C6S had the slowest release profile (PEG-BP-C6S).
  • 2
    C6S in PEG gels inhibits neurite outgrowth.
  • 3
    NGF incorporation into PEG gels not only stimulates neurite growth, but also overcomes the inhibitory effects of C6S.

Research Summary

Chondroitin sulfate is a major component of the extracellular matrix in both the central and peripheral nervous systems. Interestingly, the novel chondroitin sulfate-binding peptide enhances the controlled release properties of the chondroitin sulfate gels. While introduction of chondroitin sulfate into a scaffold inhibits primary cortical outgrowth, the combination of chondroitin sulfate, chondroitin sulfate-binding peptide and nerve growth factor promotes primary cortical neurite outgrowth in chondroitin sulfate gels.

Practical Implications

Controlled NGF Delivery

The combination of chondroitin sulfate and a binding peptide can be used to control the release of nerve growth factor from biomaterials.

Overcoming Inhibition

The inhibitory effects of chondroitin sulfate on neurite outgrowth can be overcome by incorporating nerve growth factor into the gel.

Neural Tissue Engineering

This affinity-based system is an ideal biomaterial for studying neural development and for neural tissue engineering, paving the way for new therapies.

Study Limitations

  • 1
    Further studies are needed to elucidate why cross-linking is suppressed.
  • 2
    The mechanical strength of the gels may affect NGF release from the PEG gels.
  • 3
    the results from cortical neuron culture on PEG gels showed that C6S decreased neurite outgrowth, while NGF increased neurite length.

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