Cited by 595Redox biology and oxidative stressErythrocyte Function and PathophysiologyAntioxidant Activity and Oxidative Stress

Red blood cell oxidative stress impairs oxygen delivery and induces red blood cell aging

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Mohanty, Joy G., Nagababu, Enika, Rifkind, Joseph M.·2014·Frontiers in Physiology

Abstract

Red Blood Cells (RBCs) need to deform and squeeze through narrow capillaries. Decreased deformability of RBCs is, therefore, one of the factors that can contribute to the elimination of aged or damaged RBCs from the circulation. This process can also cause impaired oxygen delivery, which contributes to the pathology of a number of diseases. Studies from our laboratory have shown that oxidative stress plays a significant role in damaging the RBC membrane and impairing its deformability. RBCs are continuously exposed to both endogenous and exogenous sources of reactive oxygen species (ROS) like superoxide and hydrogen peroxide (H2O2). The bulk of the ROS are neutralized by the RBC antioxidant system consisting of both non-enzymatic and enzymatic antioxidants including catalase, glutathione peroxidase and peroxiredoxin-2. However, the autoxidation of hemoglobin (Hb) bound to the membrane is relatively inaccessible to the predominantly cytosolic RBC antioxidant system. This inaccessibility becomes more pronounced under hypoxic conditions when Hb is partially oxygenated, resulting in an increased rate of autoxidation and increased affinity for the RBC membrane. We have shown that a fraction of peroxyredoxin-2 present on the RBC membrane may play a major role in neutralizing these ROS. H2O2 that is not neutralized by the RBC antioxidant system can react with the heme producing fluorescent heme degradation products (HDPs). We have used the level of these HDP as a measure of RBC oxidative Stress. Increased levels of HDP are detected during cellular aging and various diseases. The negative correlation (p < 0.0001) between the level of HDP and RBC deformability establishes a contribution of RBC oxidative stress to impaired deformability and cellular stiffness. While decreased deformability contributes to the removal of RBCs from the circulation, oxidative stress also contributes to the uptake of RBCs by macrophages, which plays a major role in the removal of RBCs from circulation. The contribution of oxidative stress to the removal of RBCs by macrophages involves caspase-3 activation, which requires oxidative stress. RBC oxidative stress, therefore, plays a significant role in inducing RBC aging.

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Authors
Mohanty, J. G., Nagababu, E., & Rifkind, J. M.
Affiliations
National Institute on Aging (US)
Corresponding author
Rifkind, Joseph M.
Venue
Frontiers in Physiology
Published
2014
Volume
5
Pages
84-84
ISSN
1664-042X (ISSN-L)
OpenAlex
W1971741085
Cited by
595
References
70
Citations by year
2026: 32 · 2025: 42 · 2024: 49 · 2023: 66 · 2022: 76 · 2021: 74 · 2020: 76 · 2019: 57 · 2018: 36 · 2017: 37 · 2016: 25 · 2015: 14 · 2014: 9
FWCI
2.67
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Physiology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Physiology › Erythrocyte Function and Pathophysiology
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
red blood cell aging, erythrocyte deformability, oxygen delivery, reactive oxygen species, heme degradation products, hypoxia, caspase-3 activation, cell stiffness

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