Abstract
The chick embryo chorioallantoic membrane (CAM) CAM is an extraembryonic membrane generated by the fusion of the chorion with the vascularized allantoic membrane. It performs multiple functions during embryonic development, including respiration, calcium transport from the eggshell, acid-base homeostasis, and ion/water reabsorption from the allantoic fluid. The CAM is a widely used model for the study of angiogenesis, anti-angiogenesis, tumor growth, and metastasis as well as drug efficacy. Ethical approval is omitted if experiments are terminated at embryonic day 14 in most countries, facilitating screenings of pharmacological or physics-based therapies with high reproducibility at large scales supporting the 3Rs principle. Being naturally immunodeficient, the chick embryo accepts transplantation from various tissues and species without immune response. This review article is focused on the analysis of the literature and personal data concerning the effects of patient-derived xenografts (PDX) on the CAM.
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