Human megakaryocytic progenitor cells

Klinische Wochenschrift
|April 1, 1987
PubMed

Insights

Megakaryocytic progenitor cells are key intermediate cells in blood development. This review details their unique proliferation, DNA replication, and role in blood disorders.

Area of Science:

  • Hematology
  • Cell Biology
  • Stem Cell Research

Background:

  • Megakaryocytopoiesis is a differentiation pathway for hematopoietic stem cells.
  • Megakaryocytic progenitor cells are intermediate cells between stem cells and mature megakaryocytes.
  • These cells are found in human bone marrow and peripheral blood.

Purpose of the Study:

  • To review the current understanding of human megakaryocytic progenitor cell biology.
  • To characterize their proliferation potentials and antigenic determinants.
  • To explore mechanisms governing their proliferation and maturation, and their role in thrombopoiesis disorders.

Main Methods:

  • Identification of megakaryocytic progenitor cells by their ability to proliferate in culture (colony forming unit-megakaryocyte, CFU-M).
  • Analysis of unique endoreduplication of DNA, a characteristic of the megakaryocyte lineage.
  • Review of existing literature on proliferation potentials, antigenic determinants, and regulatory mechanisms.

Main Results:

  • Megakaryocytic progenitor cells (CFU-M) possess distinct proliferation capacities.
  • These cells uniquely undergo DNA endoreduplication, a hallmark of megakaryocyte differentiation.
  • The review summarizes key biological characteristics and regulatory mechanisms.

Conclusions:

  • Megakaryocytic progenitor cells are crucial for megakaryopoiesis and platelet production.
  • Understanding their biology, including proliferation and endoreduplication, is vital.
  • Their dysfunction is implicated in various disorders of thrombopoiesis.

Related Concept Videos

Hematopoiesis01:21

Hematopoiesis

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...
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

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...
Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:
Differentiation of Common Myeloid Progenitor Cells01:15

Differentiation of Common Myeloid Progenitor Cells

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...
Overview of Hematopoiesis01:20

Overview of Hematopoiesis

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).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
Production of Formed Elements01:34

Production of Formed Elements

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...