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- W2110102431 abstract "We have recently reported that the critical difference between astrocytic cell lines that are good or poor promoters of axon growth lies in the extracellular matrix. We demonstrated that much of this difference between matrix produced by permissive and non-permissive cell lines could be ascribed to one or more dermatan/keratan sulphate proteoglycans and that these proteoglycans are able to block the neurite-promoting effect of laminin. These proteoglycans are also produced by cultures of primary astrocytes. In the present study, we have demonstrated that treatment of both astrocytic cell lines and primary astrocytes with inhibitors of proteoglycan synthesis, beta-D-xylosides and sodium chlorate, can strongly influence the axon growth promoting properties of both matrix and whole cells. Dorsal root ganglia grown on matrix or in conditioned medium from cultures treated with beta-D-xylosides or sodium chlorate had twice as many axons and the axons grew to twice the length as in control cultures. Following treatment of Neu7 cells with proteoglycan synthesis inhibitors there was also a significant reduction in the ability of Neu7 conditioned medium to block the neurite-promoting effect of laminin. Dorsal root ganglia grown on Neu7 cells treated with sodium chlorate extended 2 to 3 times the number of axons for approximately 300 mm longer distance than on control cultures. Treatment of Neu7 cells with beta-D-xylosides, however, did not make the cells less inhibitory to axon growth. We have also examined the effects of proteoglycan synthesis inhibitors on three-dimensional primary astrocyte cultures, which closely mimic the in vivo effects of astrocytes on axon growth.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2110102431 date "1995-03-01" @default.
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- W2110102431 title "Increased axon regeneration in astrocytes grown in the presence of proteoglycan synthesis inhibitors" @default.
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- W2110102431 doi "https://doi.org/10.1242/jcs.108.3.1307" @default.
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