Hemoglobin redox reactions and red blood cell aging

Joseph M. Rifkind, Nagababu Enika

Research output: Contribution to journalArticle

Abstract

Significance: The physiological mechanism(s) for recognition and removal of red blood cells (RBCs) from circulation after 120 days of its lifespan is not fully understood. Many of the processes thought to be associated with the removal of RBCs involve oxidative stress. We have focused on hemoglobin (Hb) redox reactions, which is the major source of RBC oxidative stress. Recent Advances: The importance of Hb redox reactions have been shown to originate in large parts from the continuous slow autoxidation of Hb producing superoxide and its dramatic increase under hypoxic conditions. In addition, oxidative stress has been shown to be associated with redox reactions that originate from Hb reactions with nitrite and nitric oxide (NO) and the resultant formation of highly toxic peroxynitrite when NO reacts with superoxide released during Hb autoxidation. Critical Issues: The interaction of Hb, particularly under hypoxic conditions with band 3 of the RBC membrane is critical for the generating the RBC membrane changes that trigger the removal of cells from circulation. These changes include exposure of antigenic sites, increased calcium leakage into the RBC, and the resultant leakage of potassium out of the RBC causing cell shrinkage and impaired deformability. Future Directions: The need to understand the oxidative damage to specific membrane proteins that result from redox reactions occurring when Hb is bound to the membrane. Proteomic studies that can pinpoint the specific proteins damaged under different conditions will help elucidate the cellular aging processes that result in cells being removed from circulation. Antioxid. Redox Signal. 18, 2274-2283.

Original languageEnglish (US)
Pages (from-to)2274-2283
Number of pages10
JournalAntioxidants and Redox Signaling
Volume18
Issue number17
DOIs
StatePublished - Jun 10 2013
Externally publishedYes

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Cell Aging
Redox reactions
Oxidation-Reduction
Hemoglobins
Blood
Aging of materials
Erythrocytes
Cells
Oxidative stress
Oxidative Stress
Cell membranes
Superoxides
Nitric Oxide
Cell Membrane
Peroxynitrous Acid
Blood Circulation
Poisons
Formability
Nitrites
Proteomics

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Molecular Biology
  • Physiology
  • Clinical Biochemistry

Cite this

Hemoglobin redox reactions and red blood cell aging. / Rifkind, Joseph M.; Enika, Nagababu.

In: Antioxidants and Redox Signaling, Vol. 18, No. 17, 10.06.2013, p. 2274-2283.

Research output: Contribution to journalArticle

Rifkind, Joseph M. ; Enika, Nagababu. / Hemoglobin redox reactions and red blood cell aging. In: Antioxidants and Redox Signaling. 2013 ; Vol. 18, No. 17. pp. 2274-2283.
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