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DIFFERENTIATION OF THE DIGESTIVE TRACT EPITHELIUM UNDER THE INFLUENCE OF THE HETEROLOGOUS MESENCHYME OF THE DIGESTIVE TRACT IN THE BIRD EMBRYOS
Author(s) -
YASUGI SADAO,
MIZUNO TAKEO
Publication year - 1978
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1978.00261.x
Subject(s) - mesenchyme , quail , endoderm , biology , proventriculus , gizzard , heterologous , epithelium , mesoderm , ingression , embryo , homologous chromosome , microbiology and biotechnology , anatomy , gastrulation , embryonic stem cell , endocrinology , embryogenesis , biochemistry , genetics , paleontology , gene
The endoderm of the oesophagus, proventriculus, gizzard or small intestine of the 5‐day‐old chick or quail embryo was cultivated in combination with homologous or heterologous mesenchyme on a WxxxOLFFyyy and HxxxAFFHNyyy medium for 7 to 21 days or on the chorio‐allantoic membrane (CAM) for 8 days. With homologous mesenchyme the epithelium always differentiated homotypically. In association with heterologous mesenchyme, the differentiation of the epithelium was both homotypical and heterotypical depending on the region of the digestive tract. The oesophagus and small intestine differentiate mainly homotypically both in culture and on CAM, but the gizzard and proventriculus show heterotypic differentiation particularly on CAM. Thus, the endoderm of the digestive tract of the 5‐day‐old chick or quail embryo, though rather “determined”, still reacts to the heterologous stimuli of the mesenchyme to some degree.