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Related Experiment Videos

Complement activation and protein adsorption by carbon nanotubes.

Carolina Salvador-Morales1, Emmanuel Flahaut, Edith Sim

  • 1Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford 0X1 3QR, UK. malcolm.green@chem.ox.ac.uk

Molecular Immunology
|October 4, 2005
PubMed
Summary

Carbon nanotubes activate the human immune system's complement pathways. This interaction, involving protein binding, suggests potential uses in vaccines and drugs, but also risks inflammation.

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Area of Science:

  • Nanotechnology
  • Immunology
  • Biomaterials

Background:

  • Carbon nanotubes are explored as potential vaccine and drug delivery systems.
  • Understanding their interaction with the human immune system is crucial for safety and efficacy.
  • The complement system is a key component of innate immunity involved in pathogen clearance and inflammation.

Purpose of the Study:

  • To investigate the interaction between carbon nanotubes and the human complement system.
  • To determine if carbon nanotubes activate complement via classical and alternative pathways.
  • To elucidate the mechanism of complement activation and identify bound plasma proteins.

Main Methods:

  • Haemolytic assays were used to assess complement activation.
  • Western blot and SDS-PAGE were employed to analyze protein interactions.

Related Experiment Videos

  • Direct binding assays were performed to identify proteins interacting with carbon nanotubes.

    • Main Results:

    • Carbon nanotubes were found to activate both classical and alternative complement pathways.
    • Complement protein C1q directly binds to carbon nanotubes.
    • Protein binding to carbon nanotubes is selective, with fibrinogen and apolipoproteins binding in the greatest quantities.

    Conclusions:

    • Carbon nanotube-induced complement activation may contribute to adjuvant effects in vaccines.
    • Excessive complement activation by carbon nanotubes could lead to adverse effects like inflammation.
    • Further research is needed to fully understand the implications of these interactions for biomedical applications.