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Pathophysiology of red cell volume.

Joseph A Browning1, J Clive Ellory, John S Gibson

  • 1Department of Physiology, Anatomy and Genetics, Oxford, Department of Veterinary Medicine, Cambridge, UK.

Contributions to Nephrology
|October 27, 2006
PubMed
Summary

Red blood cell volume changes are crucial in eryptosis, sickle cell disease, and stomatocytosis. These conditions involve ion channel and transporter dysregulation, impacting cell volume and function.

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Area of Science:

  • Physiology
  • Cell Biology
  • Hematology

Background:

  • Red blood cell volume regulation is critical for circulation.
  • Eryptosis, sickle cell disease, and stomatocytosis involve altered red cell volume.
  • Ion transport pathways are implicated in these volume changes.

Purpose of the Study:

  • To review the role of red cell volume changes in eryptosis, sickle cell disease, and stomatocytosis.
  • To explore the ion transport mechanisms involved in these conditions.
  • To discuss the potential involvement of non-selective cation pathways and band 3.

Main Methods:

  • Literature review of eryptosis, sickle cell disease, and stomatocytosis.
  • Analysis of ion flux mechanisms, including Gardos channels, KCl cotransport, and P(sickle).
  • Discussion of the role of band 3 (AE-1) in hereditary stomatocytosis.

Main Results:

  • Eryptosis involves KCl loss and cell shrinkage via Gardos channels.
  • Sickle cell disease red cells show dehydration due to activated KCl cotransport and Gardos channels.
  • Stomatocytoses involve increased cation permeability, potentially linked to band 3 mutations.

Conclusions:

  • Non-selective cation pathways play a significant role in red cell volume regulation across different conditions.
  • These pathways may be closely related, despite differing properties.
  • Mutations in band 3 (AE-1) could underlie altered cation fluxes in hereditary stomatocytosis.

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