Cited by 44Complement system in diseasesAntioxidant Activity and Oxidative StressErythrocyte Function and Pathophysiology

Oxidative status of red blood cells, neutrophils, and platelets in paroxysmal nocturnal hemoglobinuria

Open access
Amer, Johnny, Zelig, Orly, Fibach, Eitan·2008·Experimental Hematology

Abstract

Objective Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired stem-cell disorder associated with intravascular hemolysis and thrombosis. Hemolysis is caused by the hypersensitivity of PNH-red blood cells (RBC) to complement-mediated lysis due to deficiency in the surface glycosyl phosphatidylinositol-anchored antigens, CD55 and CD59. Thrombosis may be related to the platelet tendency to undergo hyperactivation. We previously suggested that hemolysis and thrombosis in other hemolytic anemias are related to oxidative stress. In the present study, we assessed the oxidative status of blood cells in PNH and tested the potential protective effects of antioxidants.Materials and methods Blood samples were obtained from 11 PNH patients and 11 normal control donors. Flow cytometry was used to measure oxidative stress markers in conjunction with the PNH immunophenotype.Results Results indicated that abnormal, CD55/CD59-negative, RBC, neutrophils, and platelets are under oxidative stress. Their intracellular reactive oxygen species, membrane lipid peroxides, and external phosphatidylserine were higher and their reduced glutathione was lower than CD55/CD59-positive cells of the same patient or cells of normal controls. PNH-RBC were hypersensitive to an oxidative insult (e.g., hydrogen peroxide) and their oxidative status increased following interaction with complement, prior to hemolysis. Antioxidants reduced this hemolysis as well as activation of PNH platelets.Conclusion We propose that oxidative stress mediates the symptoms of PNH and suggest that antioxidants might be considered as a therapeutic modality.

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.exphem.2007.12.003

Cites

40 of 40 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

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

Research works printed but not linked: 2

  1. Walport MJ. Complement. First of two parts. N Engl J Med. 2001;344: 1058-1066.
  2. Blockmans D, Deckmyn H, Vermylen J. Platelet activation. Blood Rev. 1995;9:143-156.

Cited by

Sorted by citations

Authors
Amer, J., Zelig, O., & Fibach, E.
Affiliations
  • Hadassah Medical Center (IL)
  • Hebrew University of Jerusalem (IL)
Corresponding author
Fibach, Eitan
Venue
Experimental Hematology
Publisher
Elsevier BV
Published
2008-04
Volume
36
Issue
4
Pages
369-377
ISSN
0301-472X (ISSN-L)
OpenAlex
W2036760054
Cited by
44
References
40
Citations by year
2025: 1 · 2024: 3 · 2023: 1 · 2021: 4 · 2020: 3 · 2019: 3 · 2018: 2 · 2017: 3 · 2015: 6 · 2014: 4 · 2013: 4 · 2012: 2
FWCI
1.11
Type
journal article
Language
en
Open access
Locations
  • Experimental Hematology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Health Sciences › Medicine › Physiology › Erythrocyte Function and Pathophysiology
Keywords
paroxysmal nocturnal hemoglobinuria, oxidative stress, erythrocytes, neutrophils, platelets, CD55, CD59, complement-mediated hemolysis, reactive oxygen species, lipid peroxidation, phosphatidylserine, reduced glutathione, antioxidants, platelet activation, thrombosis
MeSH terms
Acetylcysteine, Anemia, Antioxidants, Ascorbic Acid, Blood Platelets, Erythrocytes, Female, Flow Cytometry, Hemoglobinuria, Paroxysmal, Humans, Hydrogen Peroxide, Male, Neutrophils, Reference Values, Thrombosis, Biomarkers, Oxidants, Oxidative Stress, Tocopherols

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