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Overview of Hematopoiesis01:20

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Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
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Bone marrow transplant is a potential cure for several diseases, including cancer and specific genetic disorders. Notably, this procedure is applicable for patients suffering from aplastic anemia, certain types of leukemia, severe combined immunodeficiency disease (SCID), Hodgkin's disease, non-Hodgkin's lymphoma, multiple myeloma, thalassemia, sickle-cell disease, and certain cancers.
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Hematopoiesis01:21

Hematopoiesis

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The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
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Multipotency of Hematopoietic Stem Cells01:19

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The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
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Role of Hematopoietic Growth Factors01:28

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Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
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Regulation of Hematopoietic Stem Cells01:01

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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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Systems-based hematology: highlighting successes and next steps.

Jori E May1, Patrick C Irelan2, Kailee Boedeker2

  • 1Division of Hematology/Oncology, University of Alabama at Birmingham, Birmingham, AL.

Blood Advances
|September 22, 2020
PubMed
Summary

Systems-based hematology enhances patient care for blood disorders by optimizing quality and cost-effectiveness. This approach uses a framework to classify initiatives, improving diagnosis, management, and therapy use for better health outcomes.

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Area of Science:

  • Hematology
  • Health Systems Science
  • Quality Improvement

Background:

  • Systems-based hematology emerged in 2015 to address healthcare system pressures and optimize hematologic care.
  • Increasing recognition of opportunities to improve the quality and cost-effectiveness of care for blood disorders.
  • Need for a structured approach to understand and advance systems-based initiatives in hematology.

Purpose of the Study:

  • To propose a framework for formalizing and classifying initiatives within systems-based hematology.
  • To review published examples of successful systems-based hematology interventions.
  • To discuss future directions and career pathways in systems-based hematology.

Main Methods:

  • Developed a classification framework based on project scope and intervention method.
  • Reviewed published literature on systems-based hematology initiatives.
  • Analyzed examples of improved stewardship, therapy use, and care delivery infrastructure.

Main Results:

  • A framework was proposed to categorize systems-based hematology projects.
  • Successful initiatives demonstrated improvements in diagnosis, management, and therapy use (e.g., heparin-induced thrombocytopenia, blood products).
  • Interventions included electronic consultations and care pathways, with diverse metrics for quantifying improvements.

Conclusions:

  • Systems-based hematology offers broad potential for improving care delivery in blood disorders.
  • Future directions include expanding to malignant hematology and developing specialized career pathways.
  • Formalizing initiatives and defining career paths are crucial for the field's growth.