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HEALTH

The Claim

Sickle cell disease is caused by inherited mutations in the HBB gene that produce hemoglobin S, which polymerizes under low-oxygen conditions and causes red blood cells to sickle and obstruct small blood vessels, leading to vaso-occlusive pain crises and organ damage.

Verified by Lenz ·

The Short Version

The claim accurately summarizes the core, well-established pathophysiology of sickle cell disease. Authoritative sources agree that inherited HBB mutations produce hemoglobin S, which polymerizes when deoxygenated, causing red cells to sickle, impair flow in small vessels, trigger vaso-occlusive pain crises, and contribute to organ damage. Additional inflammatory and adhesion mechanisms exist, but they do not overturn this central mechanism.

Caveats

  • Vaso-occlusion is not caused only by misshapen red cells; endothelial adhesion, leukocytes, inflammation, and altered blood viscosity also contribute.
  • 'Inherited mutations' is broad wording: classic sickle cell anemia is usually due to a specific HBB point mutation, though other inherited HBB variant combinations can produce sickle cell disease.
  • Some listed sources are weaker secondary materials, but the conclusion is fully supported without relying on them.

The Receipts

  1. HBB gene: MedlinePlus Genetics

    MedlinePlus Genetics

  2. Sickle Cell Disease Pathophysiology

    RareDiseaseAdvisor

  3. Vaso-occlusive crisis in sickle cell disease: a vicious cycle of sickling and inflammation

    PubMed Central

  4. Sickle-cell disease - Fact sheet

    World Health Organization

  5. Development of β-globin gene correction in human hematopoietic stem cells for sickle cell disease

    PubMed Central (PMC)

  6. Allosteric control of hemoglobin S fiber formation by oxygen

    PNAS

  7. Entry - #603903 - SICKLE CELL DISEASE

    OMIM

  8. Deoxygenation - an overview

    ScienceDirect

  9. Treating sickle cell disease by targeting HbS polymerization

    Blood (via PMC)

  10. Sickle Cell Crisis

    StatPearls / NCBI Bookshelf

+ 20 more sources — see the full list on Lenz

Filed Under

HBB GeneHemoglobin SSickle Cell Disease

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