Dev Biol 1986 Feb 26;3661-2:211-6.

Quantitative effects of NGF on the growth of embryonic frog axons.

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Sparse, dissociated cultures of embryonic Xenopus CNS neurons were grown with and without NGF. Under both conditions the same number of neurons survived and extended neurites, and under both conditions the neurites moved at approximately the same overall rates and with the same degree of straightness. On the other hand, neurons in the NGF-supplemented cultures had more neurites and these neurites branched 64% more often. Detailed measurements showed that the axons elongated 44% faster in NGF and that this increase could be ascribed to a selective increase in the stepping rate of axonal elongation. These observations raise the possibility that NGF may selectively modulate the rate of movement of the core cytoskeleton of the axon.

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Species referenced: Xenopus
Genes referenced: ngf