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- W2106788594 abstract "We investigated whether turnover of basal lamina glycosaminoglycan (GAG), an active process during epithelial morphogenesis, involves the mesenchyme. Fixed, prelabeled, isolated mouse embryo submandibular epithelia were prepared retaining radioactive surface components, as determined by autoradiographic and enzymatic studies, and a basal lamina, as assessed by electron microscopy. Recombination of mouse embryo submandibular mesenchyme with these epithelia stimulates the release of epithelial radioactivity when the labeled precursor is glucosamine or glucose but not when it is amino acid. The release is linear with time during 150 min incubation. Augmented release of epithelial label requires living mesenchyme which must be close proximity with the epithelia. Although heterologous mesenchymes, including lung, trachea, and jaw, stimulate the release of submandibular epithelial label, epithelial tissues do not. The label released by intact submandibular mesenchyme from prelabeled epithelia is in GAG and in two unique fractions: heterogeneous materials of tetrasaccharide or smaller size and N-acetylglucosamine. Enzymatic treatment of the heterogeneous materials revealed the presence of glycosaminoglycan-derived oligosaccharides. These unique products were not obtained by incubating prelabeled epithelia with a mesenchymal cell extract, suggesting that intact mesenchymal cells are required. N-Acetylglucosamine was also released when mesenchyme was recombined with living prelabeled epithelia which contained labeled basal laminar GAG. Our results establish that submandibular epithelial basal lamina GAGs are degraded by submandibular mesenchyme. We propose that one mechanism of epithelial-mesenchymal interaction is the degradation of epithelial basal laminar GAG by mesenchyme." @default.
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- W2106788594 date "1982-12-01" @default.
- W2106788594 modified "2023-10-15" @default.
- W2106788594 title "Mesenchyme cells degrade epithelial basal lamina glycosaminoglycan" @default.
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- W2106788594 doi "https://doi.org/10.1016/0012-1606(82)90355-4" @default.
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