Axonal transport of type III intermediate filament protein peripherin in intact and regenerating motor axons of the rat sciatic nerve
| Autor: | J. Y. Le Gall, L. Di Giamberardino, S. Chandan, G. Filliatreau |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Male
Neurofilament Nerve Crush Blotting Western Peripherins Nerve Tissue Proteins macromolecular substances Axonal Transport Rats Sprague-Dawley Cellular and Molecular Neuroscience Intermediate Filament Proteins Slow axonal transport Animals Intermediate Filament Protein Electrophoresis Gel Two-Dimensional Cytoskeleton Intermediate filament Motor Neurons Membrane Glycoproteins Chemistry Peripherin Anatomy Sciatic Nerve Axons Nerve Regeneration Rats nervous system Biophysics Axoplasmic transport Sciatic nerve |
| Zdroj: | Journal of Neuroscience Research. 39:127-139 |
| ISSN: | 1097-4547 0360-4012 |
| DOI: | 10.1002/jnr.490390203 |
| Popis: | Slow axonal transport of peripherin has been studied in the motor axons of both intact and regenerating rat sciatic nerves 7 days post-crush. The studies were done by two-dimensional gel electrophoresis after intraspinal injection of 35S-methionine. In the first experiment, the sciatic nerves were removed 3 weeks after the radiolabeling pulse and cut into 6 mm segments. Each nerve segment was submitted to two-dimensional gel electrophoresis and analyzed by an original procedure which allowed us to study the distribution along the nerve of the radioactivity associated with several proteins of the cytoskeleton, especially the intermediate filament proteins, peripherin, and the low molecular mass neurofilament protein, NF-L. Peripherin was transported at two main rates: 66% of the total radiolabeled peripherin moved at 1.42 mm/day and the remainder moved at 2.28 mm/day. The radioactivity associated with NF-L exhibited a similar pattern. In the second experiment, similar intraspinal injections were made 7 days after a unilateral crush of the sciatic nerve. Regenerating nerves exhibited a clear SCa wave. However, in contrast to the intact nerves, the SCb wave could not be precisely defined in the regenerating nerves. Thus, the changes in the amount of transported proteins were analyzed in the SCa wave only. Autoradiograms of 2D-PAGE revealed that in the regenerating axons, the quantity of transported peripherin in SCa was increased by 3.5-fold. In contrast, the quantity of transported NF-L was decreased by 1.6-fold. The regenerating motor axons conveyed significantly greater (approximately twofold) amounts of labeled tubulins and actin than did intact motor axons. Our results suggest that peripherin, although mainly conveyed by SCa, plays a role during the elongation process in addition to actin and tubulin. © 1994 Wiley-Liss, Inc. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text