Evidence map›Paper›PMID 23626907›Full record

ArticleJournal of materials chemistry. B2013

Effect of antioxidants on enzyme-catalysed biodegradation of carbon nanotubes.

Gregg P Kotchey, James A Gaugler, Alexander A Kapralov, Valerian E Kagan, Alexander Star

Open access · greenAbstract read
In one paragraph

Article in Journal of materials chemistry. B, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
3.9field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
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  12. Antioxidative protective effect of icariin on the FeSO4/H 2O 2-damaged human sperm based on confocal raman micro-spectroscopy.Journal of Huazhong University of Science and Technology. Medical sciences = Hua zhong ke ji da xue xue bao. Yi xue Ying De wen ban = Huazhong keji daxue xuebao. Yixue Yingdewen ban · 2014
    Article
  13. Fibrillous carbon nanotube: an unexpected journey.Critical reviews in oncogenesis · 2014
    Review
  14. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Gregg P KotcheyDepartment of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
James A Gaugler
Alexander A Kapralov
Valerian E Kagan
Alexander Star
University of Pittsburgh · US

Funding

Training and EducationU19AI068021 · NIAID · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI BAYIR, HÜLYA · 2005 to 2019
$44.4M
Pulmonary Phosphatidylserine Oxidation in ApoptosisR01HL070755 · NHLBI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI KAGAN, VALERIAN E · 2002 to 2011
$3.0M
Lung Oxidative Stress/Inflammation By Carbon NanotubesR01OH008282 · OH · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI KAGAN, VALERIAN E · 2005 to 2014
$2.8M
Investigations and Mitigation of Carbon Nanomaterial ToxicityR01ES019304 · NIEHS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI STAR, ALEXANDER · 2010 to 2014
$1.9M
Irradiation Damage and Protection of Pulmonary Endothelium Oxidative LipidomicsR01HL094488 · NHLBI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI KAGAN, VALERIAN E · 2009 to 2010
$758k
NHLBI NIH HHS R01 HL070755NHLBI NIH HHS R01 HL094488NIAID NIH HHS U19 AI068021NIEHS NIH HHS R01 ES019304NIOSH CDC HHS R01 OH008282
6 · The paper itself

Abstract

The growing applications of carbon nanotubes (CNTs) inevitably increase the risk of exposure to this potentially toxic nanomaterial. In an attempt to address this issue, research has been implemented to study the biodegradation of CNTs. In particular, myeloperoxidase (MPO), an enzyme expressed by inflammatory cells of animals including humans, catalyse the degradation of oxidized carbon nanomaterials. While reactive intermediates generated by MPO efficiently degrade oxidized single-walled carbon nanotubes (o-SWCNTs); the exact mechanism of enzyme-catalysed biodegradation remains ambiguous. In this work, we tried to explain enzymatic oxidation in terms of redox potentials by employing competitive substrates for MPO such as chloride, which is oxidized by MPO to form a strong oxidant (hypochlorite), and antioxidants that have lower redox potentials than CNTs. Employing transmission electron microscopy, Raman spectroscopy, and vis-NIR absorption spectroscopy, we demonstrate that the addition of antioxidants, L-ascorbic acid and L-glutathione, with or without chloride significantly mitigates MPO-catalysed biodegradation of o-SWCNTs. This study focuses on a fundamental understanding of the mechanisms of enzymatic biodegradation of CNTs and the impact of antioxidants on these pathways.

Identifiers

PMID23626907
PMCPMC3634595
OpenAlexW1967109235

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.