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[Sickle cell anemia]

T Sugihara1

  • 1Department of Medicine, Kawasaki Medical School.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|September 1, 1996
PubMed
Summary
This summary is machine-generated.

Sickle cell anemia involves red blood cells sickling due to abnormal hemoglobin S (HbS). This polymerization causes both hemolytic anemia and vaso-occlusion, impacting the disease

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Area of Science:

  • Hematology
  • Molecular Biology
  • Pathophysiology

Context:

  • Sickle cell anemia is a genetic blood disorder characterized by hemolytic anemia and vaso-occlusive events.
  • The pathophysiology is primarily attributed to the polymerization of abnormal hemoglobin S (HbS) under low oxygen conditions.
  • Other factors like HbS instability, cation imbalance, and sickle cell adhesion to endothelium also contribute significantly.

Purpose:

  • To elucidate the multifaceted pathophysiology of sickle cell anemia.
  • To highlight the roles of HbS polymerization and other cellular defects in disease manifestation.

Summary:

  • Sickle cell anemia results from a mutation in hemoglobin (HbS), causing red blood cells to polymerize and sickle at low oxygen tension.
  • This HbS polymerization, along with unstable HbS, disturbed cation homeostasis, and increased sickle cell adhesion, drives the disease's hemolytic and vaso-occlusive features.

Related Experiment Videos

  • Unstable HbS generates oxidants, leading to iron dysregulation, cellular dehydration, altered microrheology, and endothelial adhesion, ultimately causing membrane defects and red blood cell sickling.

    • Impact:

    • Provides a comprehensive understanding of sickle cell anemia's complex pathophysiology.
    • Identifies key molecular and cellular mechanisms underlying hemolytic anemia and vaso-occlusion.
    • Informs potential therapeutic strategies targeting HbS polymerization and associated cellular dysfunctions.