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Related Concept Videos

Development of Blood Vessels01:07

Development of Blood Vessels

The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
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...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Overview of the Vascular System01:20

Overview of the Vascular System

The vascular system comprises an extensive network of arteries, capillaries, and veins. The vascular system can be broadly divided into the blood and lymphatic systems. Typically, blood vessels can be categorized into three histological regions: tunica intima, tunica media, and tunica adventitia. The tunica intima consists of a single layer of endothelial cells attached to the basal lamina. Underlying the basal lamina is a connective tissue layer and an elastic lamina that gives stability and...
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...

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Related Experiment Video

Updated: Jun 25, 2026

Isolation of Murine Embryonic Hemogenic Endothelial Cells
08:56

Isolation of Murine Embryonic Hemogenic Endothelial Cells

Published on: June 17, 2016

Decoding the hemogenic endothelium in mammals.

Françoise Dieterlen-Lièvre1, Thierry Jaffredo

  • 1UPMC, CNRS UMR7622, Laboratoire de Biologie du Développement, Bat C, 6(ème) étage, Case 24, Paris 75252, Cedex 05, France. francoise.dieterlen@club-internet.fr

Cell Stem Cell
|March 7, 2009
PubMed
Summary
This summary is machine-generated.

Recent studies reveal that endothelial precursor cells, even those not originating from the aorta, can develop into hematopoietic cells. This finding advances our understanding of blood cell development and endothelial cell plasticity.

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Last Updated: Jun 25, 2026

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Hemogenic Endothelium Differentiation from Human Pluripotent Stem Cells in A Feeder- and Xeno-free Defined Condition

Published on: June 16, 2019

Area of Science:

  • Developmental biology
  • Hematopoiesis
  • Endothelial cell biology

Background:

  • Endothelial precursor cells (EPCs) are crucial for blood vessel formation.
  • The relationship between endothelial cells and hematopoietic stem cells (HSCs) is complex and under investigation.
  • Previous research has focused on aortic-derived EPCs in hematopoiesis.

Purpose of the Study:

  • To investigate the hemogenic potential of non-aortic-derived endothelial cells.
  • To clarify the role of endothelial precursors in hematopoietic cell development.
  • To utilize advanced imaging and genetic techniques to study cell differentiation.

Main Methods:

  • Time-lapse imaging of differentiating embryonic stem cells (ESCs) with live markers.
  • Genetic analysis of ESC differentiation.
  • Comparative studies of endothelial cells from different origins.

Main Results:

  • Non-aortic-derived endothelial cells were found to be hemogenic.
  • Evidence suggests a broader role for endothelial precursors in blood formation than previously thought.
  • Live imaging revealed dynamic cellular processes involved in hemogenic endothelial differentiation.

Conclusions:

  • Endothelial cells, regardless of their origin, possess the capacity to generate hematopoietic cells.
  • This hemogenic potential of endothelial precursors expands our understanding of early hematopoiesis.
  • The findings have implications for regenerative medicine and understanding blood disorders.