Biodegradation of single-walled carbon nanotubes by eosinophil peroxidase.
Biodegradation of single-walled carbon nanotubes by eosinophil peroxidase.
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DOI:
10.1002/smll.201202508
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发表时间:
2013-08-26
期刊:
影响因子:
13.3
通讯作者:
Kagan, Valerian E.
中科院分区:
文献类型:
--
作者:
Andon, Fernando T.;Kapralov, Alexandr A.;Yanamala, Naveena;Feng, Weihong;Baygan, Arjang;Chambers, Benedict J.;Hultenby, Kjell;Ye, Fei;Toprak, Muhammet S.;Brandner, Birgit D.;Fornara, Andrea;Klein-Seetharaman, Judith;Kotchey, Gregg P.;Star, Alexander;Shvedova, Anna A.;Fadeel, Bengt;Kagan, Valerian E.
Eosinophil peroxidase (EPO) is one of the major oxidant-producing enzymes during inflammatory states in the human lung. The degradation of single-walled carbon nanotubes (SWCNTs) upon incubation with human EPO and H2O2 is reported. Biodegradation of SWCNTs is higher in the presence of NaBr, but neither EPO alone nor H2O2 alone caused the degradation of nanotubes. Molecular modeling reveals two binding sites for SWCNTs on EPO, one located at the proximal side (same side as the catalytic site) and the other on the distal side of EPO. The oxidized groups on SWCNTs in both cases are stabilized by electrostatic interactions with positively charged residues. Biodegradation of SWCNTs can also be executed in an ex vivo culture system using primary murine eosinophils stimulated to undergo degranulation. Biodegradation is proven by a range of methods including transmission electron microscopy, UV-visible-NIR spectroscopy, Raman spectroscopy, and confocal Raman imaging. Thus, human EPO (in vitro) and ex vivo activated eosinophils mediate biodegradation of SWCNTs: an observation that is relevant to pulmonary responses to these materials.
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DOI:
10.4049/jimmunol.0904043
发表时间:
2010-06-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Dyer KD;Percopo CM;Xie Z;Yang Z;Kim JD;Davoine F;Lacy P;Druey KM;Moqbel R;Rosenberg HF
通讯作者:
Rosenberg HF
影响因子:
11.4
作者:
Jia, G;Wang, HF;Guo, XB
通讯作者:
Guo, XB
DOI:
10.1002/prot.340230306
发表时间:
1995-11-01
期刊:
PROTEINS-STRUCTURE FUNCTION AND GENETICS
影响因子:
--
作者:
SALI, A;POTTERTON, L;KARPLUS, M
通讯作者:
KARPLUS, M
影响因子:
2.2
作者:
Adamko, DJ;Wu, YQ;Moqbel, R
通讯作者:
Moqbel, R
DOI:
10.1164/ajrccm.161.3.9911005
发表时间:
2000-03-01
影响因子:
24.7
作者:
Hunt, JF;Fang, KZ;Gaston, B
通讯作者:
Gaston, B