Related Experiment Video
Updated: Jul 16, 2026
09:03
Modified In Vivo Matrix Gel Plug Assay for Angiogenesis Studies
Published on: June 30, 2023
Effects of danazol on endothelial cell function and angiogenesis
Gregory W Thomas1, Leonard T Rael, Rick Shimonkevitz
1DMI Biosciences Inc., Aurora, Colorado, USA.
Fertility and Sterility
|March 27, 2007
Summary
The synthetic steroid danazol significantly inhibits endothelial cell proliferation and tube formation, key steps in angiogenesis. However, danazol did not affect endothelial cell invasion in vitro.
Area of Science:
- Endocrinology
- Cell Biology
- Vascular Biology
Background:
- Angiogenesis is crucial for physiological and pathological processes.
- Synthetic steroids like danazol have complex biological effects.
- Understanding danazol's impact on endothelial cells is important for its therapeutic applications.
Purpose of the Study:
- To investigate the effects of danazol on endothelial cell function.
- To determine danazol's impact on key steps of angiogenesis in vitro.
Main Methods:
- Utilized in vitro cell culture models with human umbilical vein endothelial cells (HUVEC).
- Assessed endothelial cell proliferation, invasion, and capillary-like tube formation.
- Treated HUVEC with danazol across a range of concentrations (1-100 microM).
Main Results:
- Danazol significantly reduced endothelial cell proliferation by up to 86%.
- Danazol decreased capillary-like tube formation (tube length) by up to 115%.
- Endothelial cell invasion through extracellular matrix was not significantly affected by danazol.
Conclusions:
- Danazol interferes with critical steps of angiogenesis, specifically proliferation and tube formation.
- The findings suggest a potential mechanism for danazol's in vivo effects.
- Further research is warranted to fully elucidate danazol's role in vascular biology.
Related Concept Videos
01:24Regulation 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...
01:10Mechanism 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...
01:18Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists
Endothelins (ETs) are potent vasoactive peptides critical in the human body's various physiological and pathological processes. One of the most promising therapeutic strategies for treating pulmonary arterial hypertension (PAH) involves counteracting the effects of these endothelins using a class of drugs known as endothelin receptor antagonists.
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...