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• W2119903396 abstract "The mechanisms underlying cessation of glial proliferation in the developing peripheral nervous system are obscure. One possibility, as yet little explored, is that mitotic inhibitory signals play a part in regulating glial cell numbers. In this study we demonstrate that type I collagen preparations from several different sources can inhibit the rate of DNA synthesis in purified populations of enteric glia and both short-term and long-term secondary Schwann cells in dissociated cell cultures. When these cells are grown on gelled or dried type I collagen substrata, they proliferate at substantially lower rates than on polylysine substrata. In contrast, type III or V collagen preparations do not inhibit glial DNA synthesis and laminin, fibronectin, type IV collagen, and secreted matrix from bovine corneal endothelial cells all stimulate thymidine incorporation. The inhibitory effect is not observed with heat denatured type I collagen preparations, but is seen equally in serum-containing medium, in medium containing fibronectin-free serum, or in serum-free medium, suggesting that the interaction of collagen with the cells requires structurally intact collagen molecules and does not occur via intermediary linkage to fibronectin. The inhibition on collagen is accompanied by a shape change from a more flattened morphology to a narrow spindle form. The labeling index of a rat Schwannoma cell line, 33B, is not inhibited on type I collagen substrata. These results demonstrate that type I collagen preparations inhibit the DNA synthesis levels of early postnatal peripheral glial cells in vitro. It remains to be determined whether this effect occurs via direct collagen-cell membrane interactions or whether it depends on accessory molecules, perhaps present in the collagen preparations themselves, since these are not purified to absolute homogeneity." @default.
• W2119903396 created "2016-06-24" @default.
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• W2119903396 date "1989-05-01" @default.
• W2119903396 modified "2023-09-29" @default.
• W2119903396 title "Type I collagen preparations inhibit DNA synthesis in glial cells of the peripheral nervous system" @default.
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• W2119903396 doi "https://doi.org/10.1016/0014-4827(89)90289-9" @default.
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