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Innate immune humoral factors, C1q and factor H, with differential pattern recognition properties, alter macrophage response to carbon nanotubes.

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journal contribution
posted on 20.01.2017, 12:37 by K. M. Pondman, L. Pednekar, B. Paudyal, A. G. Tsolaki, L. Kouser, H. A. Khan, M. H. Shamji, B. Ten Haken, G. Stenbeck, Robert B. Sim, U. Kishore
Interaction between the complement system and carbon nanotubes (CNTs) can modify their intended biomedical applications. Pristine and derivatised CNTs can activate complement primarily via the classical pathway which enhances uptake of CNTs and suppresses pro-inflammatory response by immune cells. Here, we report that the interaction of C1q, the classical pathway recognition molecule, with CNTs involves charge pattern and classical pathway activation that is partly inhibited by factor H, a complement regulator. C1q and its globular modules, but not factor H, enhanced uptake of CNTs by macrophages and modulated the pro-inflammatory immune response. Thus, soluble complement factors can interact differentially with CNTs and alter the immune response even without complement activation. Coating CNTs with recombinant C1q globular heads offers a novel way of controlling classical pathway activation in nanotherapeutics. Surprisingly, the globular heads also enhance clearance by phagocytes and down-regulate inflammation, suggesting unexpected complexity in receptor interaction. From the Clinical Editor Carbon nanotubes (CNTs) maybe useful in the clinical setting as targeting drug carriers. However, it is also well known that they can interact and activate the complement system, which may have a negative impact on the applicability of CNTs. In this study, the authors functionalized multi-walled CNT (MWNT), and investigated the interaction with the complement pathway. These studies are important so as to gain further understanding of the underlying mechanism in preparation for future use of CNTs in the clinical setting.

Funding

L.P., A.G.T., L.K., G.S. and U.K. thank Brunel University London for strategic Infrastructure funding. H.A.K. acknowledges the Deanship of Scientific Research at King Saud University for funding via Group No. RGP-009.

History

Citation

Nanotechnology, Biology, and Medicine 11 (2015) 2109–2118

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/School of Medicine/Department of Infection, Immunity and Inflammation

Version

VoR (Version of Record)

Published in

Nanotechnology

Publisher

Elsevier

issn

1549-9634

Acceptance date

21/06/2015

Copyright date

2015

Available date

20/01/2017

Publisher version

http://www.sciencedirect.com/science/article/pii/S1549963415001392

Notes

Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.nano.2015.06.009.

Language

en