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Related Concept Videos

Cellular Differentiation00:57

Cellular Differentiation

How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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...
Cell Adhesion Molecules - Types and Functions01:20

Cell Adhesion Molecules - Types and Functions

Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
CAM Families
The Integrin family of proteins is primarily  involved in a...
Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
Distinctive Features of Adult Stem Cells vs Cancer Stem Cells01:18

Distinctive Features of Adult Stem Cells vs Cancer Stem Cells

A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
Adult stem cells
Adult stem cells are tissue-specific; hence, they divide to develop the tissue from which they originate. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of the skin. Adult bone marrow has three distinct types of stem cells:...

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Updated: May 31, 2026

Isolation and Differentiation of Stromal Vascular Cells to Beige/Brite Cells
07:22

Isolation and Differentiation of Stromal Vascular Cells to Beige/Brite Cells

Published on: March 28, 2013

Adventitial biology: differentiation and function.

Yanhua Hu1, Qingbo Xu

  • 1Cardiovascular Division, King's College London British Heart Foundation, Centre, London, United Kingdom.

Arteriosclerosis, Thrombosis, and Vascular Biology
|June 17, 2011
PubMed
Summary
This summary is machine-generated.

Adventitial stem cells in blood vessels contribute to vascular repair and lesion formation. Inflammation can mobilize and differentiate these progenitors, impacting arterial wall diseases.

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Last Updated: May 31, 2026

Isolation and Differentiation of Stromal Vascular Cells to Beige/Brite Cells
07:22

Isolation and Differentiation of Stromal Vascular Cells to Beige/Brite Cells

Published on: March 28, 2013

Differentiation Capacity of Human Aortic Perivascular Adipose Progenitor Cells
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Differentiation Capacity of Human Aortic Perivascular Adipose Progenitor Cells

Published on: March 5, 2019

Immunomagnetic Isolation of the Vascular Wall-Resident CD34+ Stem Cells from Mice
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Immunomagnetic Isolation of the Vascular Wall-Resident CD34+ Stem Cells from Mice

Published on: December 22, 2023

Area of Science:

  • Vascular Biology
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Stem/progenitor cells reside in the adventitia, the outer layer of blood vessels.
  • These cells play roles in vascular repair and the development of neointimal lesions.
  • Adventitial stem cells can differentiate into endothelial and smooth muscle cells.

Purpose of the Study:

  • To review the presence and function of resident stem cells in the vascular adventitia.
  • To discuss the pathological impact of adventitial progenitors in vascular diseases.
  • To explore signaling pathways regulating stem cell differentiation and controversial roles.

Main Methods:

  • Review of existing scientific literature on adventitial stem cells.
  • Analysis of data on stem cell mobilization and differentiation in response to inflammatory stimuli.
  • Discussion of signaling pathways involved in vascular lineage differentiation.

Main Results:

  • Adventitial stem/progenitor cells are integral to vascular repair and neointimal lesion formation.
  • Cytokines released during adventitial inflammation (e.g., SDF-1, TNF-α) mobilize and differentiate these cells.
  • These progenitors significantly impact pathophysiological processes in the arterial wall.

Conclusions:

  • Adventitial stem cells are key players in vascular disease pathogenesis.
  • Understanding their differentiation pathways is crucial for therapeutic strategies.
  • Further research is needed to clarify controversial aspects of their role.