PMID: 6164682Apr 1, 1981Paper

Changes in axonally transported proteins during axon regeneration in toad retinal ganglion cells

The Journal of Cell Biology
J H Skene, M Willard

Abstract

In an effort to understand the regulation of the transition of a mature neuron to the growth, or regenerating, state we have analyzed the composition of the axonally transported proteins in the retinal ganglion cells of the toad Bufo marinus after inducing axon regeneration by crushing the optic nerve. At increasing intervals after axotomy, we labeled the retinal ganglion cells with [35S]methionine and subsequently analyzed the labeled transported polypeptides in the crushed optic nerve by means of one- and two-dimensional electrophoretic techniques. The most significant conclusion from these experiments is that, while the transition from the mature to the regenerating state does not require a gross qualitative alteration in the composition of axonally transported proteins, the relative labeling of a small subset of rapidly transported proteins is altered dramatically (changes of more than 20-fold) and reproducibly (more than 30 animals) by axotomy. One of these growth-associated proteins (GAPs) was soluble in an aqueous buffer, while three were associated with a crude membrane fraction. The labeling of all three of the membrane-associated GAPs increased during the first 8 d after axotomy, and they continued to be labeled for a...Continue Reading

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Apr 1, 1992·Diabetes/metabolism Reviews·D R Tomlinson
Jun 1, 1982·Neurochemical Research·A M Heacock, B W Agranoff
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