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Sickle cell disease.

Gregory J Kato1, Frédéric B Piel2, Clarice D Reid3

  • 1Heart, Lung and Blood Vascular Medicine Institute and the Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh, 200 Lothrop Street, Pittsburgh, PA 15261, USA.

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Summary
This summary is machine-generated.

Sickle cell disease (SCD) is a genetic blood disorder affecting hundreds of thousands of newborns annually. Early diagnosis and available treatments are crucial for managing SCD complications and improving patient survival rates.

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Area of Science:

  • Genetics and Molecular Biology
  • Hematology
  • Public Health

Background:

  • Sickle cell disease (SCD) is an inherited blood disorder caused by mutations in the HBB gene, affecting 300,000-400,000 neonates globally each year.
  • Mutant hemoglobin causes red blood cells to sickle, leading to hemolysis, vaso-occlusion, and immune system activation.
  • SCD presents with complex phenotypes, including acute pain, acute chest syndrome, stroke, and chronic organ damage like kidney disease.

Purpose of the Study:

  • To summarize the pathophysiology, clinical manifestations, and management of sickle cell disease.
  • To highlight the importance of early diagnosis and newborn screening for improving outcomes.
  • To discuss challenges in implementing screening programs in high-burden, low-income regions.

Main Methods:

  • Literature review of SCD pathophysiology, clinical features, and treatment modalities.
  • Analysis of global incidence data for SCD neonates.
  • Examination of current diagnostic and therapeutic strategies, including screening programs.

Main Results:

  • SCD results from HBB gene mutations, leading to polymerization of abnormal hemoglobin and sickled erythrocytes.
  • Vaso-occlusion and immune activation are key contributors to SCD's complex pathology.
  • Available treatments like hydroxycarbamide, transfusions, and stem cell transplantation can mitigate disease severity.

Conclusions:

  • Early diagnosis of SCD is critical for improving survival and requires effective newborn screening.
  • While treatments exist, challenges remain in implementing universal screening in resource-limited settings.
  • Continued research and public health initiatives are needed to address the global burden of sickle cell disease.