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Nano Lett. 2017 Jun 14;17(6):3409-3415. doi: 10.1021/acs.nanolett.7b00189. Epub 2017 May 30.

Human Immune Protein C1q Selectively Disaggregates Carbon Nanotubes.

Author information

1
Université Grenoble Alpes, CEA LITEN , F-38000 Grenoble, France.
2
Université Grenoble Alpes, CEA, CNRS, IBS , F-38000 Grenoble, France.
3
Service de Chimie Bioorganique et de Marquage (SCBM), CEA, Université Paris-Saclay , 91191 Gif-sur-Yvette, France.

Abstract

We atomistically compute the change in free energy upon binding of the globular domain of the complement protein C1q to carbon nanotubes (CNTs) and graphene in solution. Our modeling results imply that C1q is able to disaggregate and disperse bundles of large diameter multiwalled CNTs but not those of thin single-walled CNTs, and we validate this prediction with experimental observations. The results support the view of a strong binding with potential implications for the understanding of the immune response and biomedical applications of graphitic nanomaterials.

KEYWORDS:

C1q; Carbon nanotubes; free energy; molecular dynamics; solvation; toxicity

PMID:
28530824
DOI:
10.1021/acs.nanolett.7b00189
[Indexed for MEDLINE]

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