Differentiation of proventricular epithelium in xenoplastic associations with mesenchymal or fibroblastic cells |
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Authors: | Sadao Yasugi Michèle Kedinger Patricia Simon-Assmann Françoise Bouziges Katy Haffen |
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Institution: | (1) Zoological Institute, Faculty of Science, University of Tokyo, Hongo, 113 Tokyo, Japan;(2) Unite 61 INSERM, Biologie cellulaire et physiopathologie digestive, 3 Avenue Molière, 67200 Strasbourg-Hautepierre, France |
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Abstract: | Summary Proventricular epithelium (PV epithelium) from 6-day chicken embryos was associated with cultured cells, derived from fetal
rat small intestine, or with fetal rat or human skin fibroblasts. The cytodifferentiation of PV epithelium was investigated
using antibodies to chicken pepsinogen, a marker protein of PV epithelium, and to chicken sucrase, a marker enzyme of the
small-intestinal brush-border membrane.
PV epithelium formed complex glands and produced pepsinogen in association with cultured gut mesenchymal cells and skin fibroblasts.
Its development was comparable to that achieved under the influence of PV mesenchyme. PV epithelial development was severely
inhibited, however, under the influence of intact chicken or rat intestinal mesenchyme. The data are consistent with the idea
that during the first step of epithelial-mesenchymal interactions, the epithelium and not the mesenchyme may be responsible
for the determination of the developmental fate. |
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Keywords: | Epithelial Mesenchymal interaction Proventricular epithelium Cultured cells Pepsinogen expression Sucrase expression |
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