Mesenchyme cells degrade epithelial basal lamina glycosaminoglycan.

Mesenchyme cells degrade epithelial basal lamina glycosaminoglycan.
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间充质细胞降解上皮基底层糖胺聚糖。

DOI:
10.1016/0012-1606(82)90355-4
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发表时间:
1982
影响因子:
2.7
通讯作者:
Bernfield,M
Bernfield,M
中科院分区:
生物学3区
文献类型:
--
作者:
Smith,RL;Bernfield,M

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我们调查是否营业额的基底层糖胺聚糖(GAG),上皮形态发生过程中的一个积极的过程,涉及间充质。固定,预标记,分离的小鼠胚胎下颌下上皮细胞保留放射性表面成分,通过放射自显影和酶的研究,和基底层,通过电子显微镜进行评估。当标记的前体是氨基葡萄糖或葡萄糖而不是氨基酸时,用这些上皮细胞对小鼠胚胎颌下间充质进行修饰刺激上皮放射性的释放。在150 min孵育期间,释放与时间呈线性关系。上皮标记的增强释放需要必须与上皮紧密接近的活的间充质。虽然异源间充质,包括肺,气管,和下巴,刺激下颌下上皮标签的释放,上皮组织不。完整的下颌下间充质从预先标记的上皮细胞释放的标记物是GAG和两种独特的组分:四糖或更小尺寸的异质材料和N-乙酰葡萄糖胺。对异质材料的酶处理揭示了糖胺聚糖衍生的寡糖的存在。这些独特的产品没有通过孵育预标记的上皮细胞与间充质细胞提取物,这表明,完整的间充质cells是必需的。N-乙酰氨基葡萄糖也被释放时,间充质重组活的预标记的上皮细胞,其中包含标记的基底层GAG。我们的研究结果表明,下颌下上皮基底层糖胺聚糖降解的下颌下间充质。我们认为上皮-间充质相互作用的机制之一是间充质对上皮基底层GAG的降解。
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 andN-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.
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发表时间: 1979
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发表时间: 1979
影响因子: 3.7
作者:
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唾液上皮形态和分支形态发生对上皮表面酸性粘多糖蛋白(蛋白聚糖)的依赖性
DOI: --
发表时间: 1972
影响因子: 7.8
作者:
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DOI: --
发表时间: 1974
期刊: Journal of embryology and experimental morphology
影响因子: --
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