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Vasculogenesis and angiogenesis: two distinct morphogenetic mechanisms establish embryonic vascular pattern
1Department of Anatomy and Cell Biology, SUNY Health Science Center, Syracuse 13210.
The Journal of Experimental Zoology
|August 1, 1989
Summary
Quail embryo studies reveal angioblast migration during blood vessel formation. Microsurgical experiments show cell movement contributes to vascular patterns in both head and trunk development.
Area of Science:
- Developmental Biology
- Embryology
- Vascular Biology
Background:
- Angioblasts are key cells for embryonic blood vessel development.
- Two primary mechanisms of blood vessel formation are vasculogenesis and angiogenesis.
- Previous work identified mesodermal angioblasts in major embryonic vessels.
Purpose of the Study:
- To investigate cell migration during blood vessel formation in quail embryos.
- To determine the contribution of angioblast migration to vascular patterning.
- To differentiate between vasculogenesis and angiogenesis through transplantation.
Main Methods:
- Utilized monoclonal antibody QH-1 to label angioblasts.
- Performed microsurgical transplantation of quail mesoderm into chick hosts.
- Analyzed chimeric embryos to observe angioblast migration and incorporation.
Main Results:
- Transplanted quail mesoderm integrated into host vascular systems.
- Angioblasts migrated extensively from graft sites in the head.
- Grafted mesoderm contributed to dorsal aortae and sprouting vessels in the trunk.
Conclusions:
- Angioblast migration is a significant factor in establishing vascular patterns.
- Vascular development involves both in-place formation and cell migration.
- Specific points of angioblast entry influence head vascularization.