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A STUDY OF HUMAN SKIN GRAFTED UPON THE CHORIO-ALLANTOIS OF CHICK EMBRYOS
E W Goodpasture1, B Douglas, K Anderson
1Departments of Pathology and Surgery, Vanderbilt University Medical School, Nashville.
Insights
Human skin grafts successfully integrated with chick embryos for up to 14 days, establishing vascular connections for nourishment. These grafts, however, remained susceptible to viral infections.
Area of Science:
- Developmental Biology
- Tissue Engineering
- In Vivo Models
Background:
- Human skin grafts can be maintained on chick embryos for extended periods.
- Understanding graft-host interactions is crucial for regenerative medicine.
Purpose of the Study:
- To investigate the viability and integration of human skin grafts on chick embryo chorio-allantoic membranes.
- To explore the vascularization and susceptibility to infection of human skin xenografts.
Main Methods:
- Grafting human skin onto the chorio-allantoic membrane of chick embryos.
- Observing graft adherence, nourishment, and vascular integration over time.
- Assessing graft susceptibility to experimental viral infections.
Main Results:
- Human skin grafts adhered and were nourished for up to 10 days, with some regrafts surviving 14 days.
- Successful grafts showed epithelial fusion, collagen intermingling, and vascular anastomosis between graft and host.
- A plasmatic circulation and gradual revascularization from the chick membrane supported the graft.
- Human skin xenografts demonstrated susceptibility to various viral infections.
Conclusions:
- The chick embryo chorio-allantoic membrane provides a viable environment for human skin xenografts.
- Vascular integration is key to graft survival, with potential for revascularization.
- Human skin xenografts serve as a model for studying viral pathogenesis.
Abstract:
Human skin grafted upon the chorio-allantoic membrane of chick embryos adheres and becomes nourished for as long as 10 days. Occasionally regrafts upon a second egg have succeeded and thus prolonged the vitality of the graft to 14 days. In successful experiments the epithelium of the chorio-allantois fuses with that of the graft, the collagen fibers of the corium interlace with those of the membrane after the separation or disappearance of the ectodermal layer, and the blood vessels of the chick anastomose, and unite by intervening pools of extravasated blood, with those of the graft. This vascular communication between the two tissues is largely responsible for the nourishment of the graft by affording a plasmatic circulation. Gradually there is a partial revascularization of the graft by an ingrowth of blood vessels from the chick membrane. Human skin grafts were susceptible to experimental infection by several viruses.
