PMID: 6160585Oct 1, 1980Paper

Fast axonal transport in the presence of high Ca2+: evidence that microtubules are not required

Proceedings of the National Academy of Sciences of the United States of America
S T BradyW O McClure

Abstract

Microtubules have long been associated with the mechanism of fast axoplasmic transport, although experimental evidence to support an involvement has been equivocal. Electron microscopic studies demonstrated that incubation of the axons of excised rat sciatic nerves in media containing 75 mM Ca2+ caused complete loss of microtubules within 6 hr. To evaluate the role of microtubules in fast anterograde transport, studies of transport in nerves exposed to these conditions were undertaken. Prior to measurement of axoplasmic transport, nerves ligated distal to the dorsal root ganglia were preincubated in vitro in 75 mM Ca2+ for 0-6 hr. Fast axonal transport was subsequently monitored by measuring the amount of trichloroacetic acid-insoluble radioactivity that accumulated at the ligature after incubation for 12-18 hr with L-[3H]proline. Nerves in which microtubules had been depolymerized by preincubation in high Ca2+ maintained control levels of transport. We conclude that intact microtubules are not required for fast anterograde axoplasmic transport.

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Citations

Jun 1, 1984·Neurochemical Research·S Ochs, R A Jersild
Dec 1, 1995·The Journal of Cell Biology·R L Morris, P J Hollenbeck
Dec 1, 1981·The Journal of Cell Biology·S R HeidemannM A Hamborg
Jan 11, 2011·Biochimica Et Biophysica Acta·A RoviniM Carré
Mar 26, 1986·Brain Research·S D GanG P He
Jan 1, 1981·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·B K Siesjö
Jan 1, 1987·Cell Motility and the Cytoskeleton·Z Sahenk, S T Brady
Jan 1, 1984·Acta Psychiatrica Scandinavica. Supplementum·B K Siesjö

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