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Related Concept Videos

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...
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...
Healing II: Complications01:24

Healing II: Complications

Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...
The Tumor Microenvironment02:17

The Tumor Microenvironment

Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...

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Related Experiment Video

Updated: Jul 14, 2026

Investigating Angiogenesis on a Functional and Molecular Level by Leveraging the Scratch Wound Migration Assay and the Spheroid Sprouting Assay
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Investigating Angiogenesis on a Functional and Molecular Level by Leveraging the Scratch Wound Migration Assay and the Spheroid Sprouting Assay

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Current concepts in normal and defective angiogenesis: implications for systemic sclerosis.

Mary Jo Mulligan-Kehoe1, Michael Simons

  • 1Section of Cardiology, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH 03756, USA.

Current Rheumatology Reports
|May 16, 2007
PubMed
Summary

Systemic sclerosis involves vascular issues, with early exaggerated blood vessel growth later failing. This review explores the angiogenic imbalance in systemic sclerosis, impacting wound healing and fibrosis.

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Related Experiment Videos

Last Updated: Jul 14, 2026

Investigating Angiogenesis on a Functional and Molecular Level by Leveraging the Scratch Wound Migration Assay and the Spheroid Sprouting Assay
09:16

Investigating Angiogenesis on a Functional and Molecular Level by Leveraging the Scratch Wound Migration Assay and the Spheroid Sprouting Assay

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Monitoring Functionality and Morphology of Vasculature Recruited by Factors Secreted by Fast-growing Tumor-generating Cells
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Published on: November 23, 2014

Area of Science:

  • Vascular Biology
  • Rheumatology
  • Pathophysiology

Background:

  • Vascular abnormalities are a key feature of systemic sclerosis.
  • The mechanisms initiating vascular injury and impairing repair in this condition remain unclear.
  • Early systemic sclerosis shows excessive blood vessel formation (angiogenesis).

Purpose of the Study:

  • To review current knowledge on the angiogenic imbalance in systemic sclerosis.
  • To understand the transition from exaggerated angiogenesis to impaired healing.

Main Methods:

  • Literature review of studies on vascular aspects of systemic sclerosis.
  • Analysis of research on angiogenesis and fibrosis in the disease context.

Main Results:

  • Systemic sclerosis exhibits an initial hyper-angiogenic phase.
  • This is followed by impaired wound healing and fibrotic processes.
  • An angiogenic imbalance contributes to the disease's vascular pathology.

Conclusions:

  • The angiogenic imbalance is central to systemic sclerosis vascular complications.
  • Understanding these mechanisms is crucial for developing targeted therapies.
  • Further research is needed to elucidate the precise molecular pathways involved.