Cited by 51Nitric Oxide and Endothelin EffectsNeutrophil, Myeloperoxidase and Oxidative MechanismsAtherosclerosis and Cardiovascular Diseases

Low-density lipoprotein modified by myeloperoxidase oxidants induces endothelial dysfunction

Open access
Abdo, Adrian I., Rayner, Benjamin S., van Reyk, David M., Hawkins, Clare L.·2017·Redox Biology

Abstract

Low-density lipoprotein (LDL) modified by hypochlorous acid (HOCl) produced by myeloperoxidase (MPO) is present in atherosclerotic lesions, where it is implicated in the propagation of inflammation and acceleration of lesion development by multiple pathways, including the induction of endothelial dysfunction . Thiocyanate (SCN - ) ions are utilised by MPO to produce the oxidant hypothiocyanous acid (HOSCN), which reacts with LDL in a different manner to HOCl. Whilst the reactivity of HOCl-modified LDL has been previously studied, the role of HOSCN in the modification of LDL in vivo is poorly defined, although emerging evidence suggests that these particles have distinct biological properties. This is important because elevated plasma SCN - is linked with both the propagation and prevention of atherosclerosis . In this study, we demonstrate that both HOSCN- and HOCl-modified LDL inhibit endothelium-mediated vasorelaxation ex vivo in rat aortic ring segments. In vitro experiments with human coronary artery endothelial cells show that HOSCN-modified LDL decreases in the production of nitric oxide (NO • ) and induces the loss of endothelial nitric oxide synthase (eNOS) activity. This occurs to a similar extent to that seen with HOCl-modified LDL. In each case, these effects are related to eNOS uncoupling, rather than altered expression, phosphorylation or cellular localisation . Together, these data provide new insights into role of MPO and LDL modification in the induction of endothelial dysfunction, which has implications for both the therapeutic use of SCN - within the setting of atherosclerosis and for smokers, who have elevated plasma levels of SCN - , and are more at risk of developing cardiovascular disease.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.redox.2017.08.004

Cites

63 of 63 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • HOCl decreases eNOS activity and NO bioavailability by a number of direct and indirect mechanisms, disrupting protective NO signaling.

    “Hypochlorous acid decreases eNOS activity and NO bioavailability by a number of direct and indirect mechanisms, disrupting protective NO signaling (2, 464, 1054).”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Abdo, A. I., Rayner, B. S., van Reyk, D. M., & Hawkins, C. L.
Affiliations
  • The University of Sydney (AU)
  • University of Copenhagen (DK)
Corresponding author
Hawkins, Clare L.
Venue
Redox Biology
Publisher
Elsevier BV
Published
2017-10
Volume
13
Pages
623-632
ISSN
2213-2317 (ISSN-L)
OpenAlex
W2745305461
Cited by
51
References
62
Citations by year
2026: 2 · 2025: 9 · 2024: 3 · 2023: 6 · 2022: 7 · 2021: 8 · 2020: 6 · 2019: 7 · 2018: 2
FWCI
3.03
Type
journal article
Language
en
Open access
Locations
  • Redox Biology (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • UTS ePRESS (University of Technology Sydney) (submittedVersion)
Funders
  • University of Sydney
  • Australian Research Council (FT120100682)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
Keywords
LDL oxidation, myeloperoxidase, hypochlorous acid, hypothiocyanous acid, thiocyanate, endothelial dysfunction, nitric oxide, endothelial nitric oxide synthase uncoupling, atherosclerosis, vasorelaxation, smokers
MeSH terms
Animals, Aorta, Cells, Cultured, Hypochlorous Acid, Lipoproteins, LDL, Male, Peroxidase, Nitric Oxide, Thiocyanates, Vasodilation, Rats, Sprague-Dawley, Endothelial Cells, Rats, Nitric Oxide Synthase Type III

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review