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Related Concept Videos

Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

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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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Production of Formed Elements01:34

Production of Formed Elements

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Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
Most HSCs commit to...
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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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Differentiation of Common Myeloid Progenitor Cells01:15

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Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
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Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby stem cells:
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Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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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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Isolation of Endothelial Progenitor Cells from Healthy Volunteers and Their Migratory Potential Influenced by Serum Samples After Cardiac Surgery
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Endothelial progenitor cells in hematologic malignancies.

Ugo Testa1, Ernestina Saulle1, Germana Castelli1

  • 1Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome, Italy.

Stem Cell Investigation
|September 2, 2016
PubMed
Summary
This summary is machine-generated.

New research clarifies how progenitor cells drive angiogenesis, crucial for both normal and pathological conditions like leukemia. Understanding these mechanisms offers new therapeutic targets for hematological malignancies.

Keywords:
Endothelial progenitor cells (EPCs)chronic myeloid leukemia (CML)endothelial colony-forming cell (ECFS)

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Area of Science:

  • Cellular and molecular biology
  • Hematology
  • Oncology

Background:

  • Angiogenesis, the formation of new blood vessels, is vital in adult life, regulated by complex cellular and molecular mechanisms.
  • Progenitor cells, including hematopoietic angiogenic cells and endothelial colony-forming cells (ECFCs), play key roles in sustaining angiogenesis via paracrine and direct mechanisms.
  • Increased angiogenesis is a hallmark of hematological malignancies such as chronic myeloid leukemia (CML), acute myeloid leukemia (AML), myelodysplastic syndromes, and multiple myeloma, contributing to disease progression.

Purpose of the Study:

  • To elucidate the cellular and molecular mechanisms controlling angiogenesis in normal and pathological states.
  • To investigate the role of progenitor cells in angiogenesis, particularly in hematological malignancies.
  • To explore the potential origin of endothelial cells from malignant clones and identify new therapeutic targets.

Main Methods:

  • Review and synthesis of recent studies on angiogenesis and progenitor cells.
  • Analysis of the contribution of hematopoietic angiogenic cells and ECFCs to angiogenic processes.
  • Examination of the link between angiogenesis and hematological malignancies.

Main Results:

  • Identification of distinct progenitor cell populations (hematopoietic angiogenic cells and ECFCs) involved in angiogenesis.
  • Evidence of stimulated angiogenesis in various hematological malignancies, correlating with disease progression.
  • Preliminary findings suggest endothelial cells may originate from malignant clones in some conditions, hinting at a hemangioblastic progenitor origin for leukemic cells.

Conclusions:

  • Enhanced understanding of angiogenesis mechanisms in hematological malignancies provides insights into tumor progression.
  • The study highlights the potential for novel therapeutic strategies targeting angiogenesis in these diseases.
  • The findings suggest a possible link between leukemic cell origin and hemangioblastic progenitors capable of dual differentiation.