Summary
In vitro incubation of autonomic nerves with vinblastine sulphate (1×10-4 M) caused a disappearance of microtubules within 15 min; during the following 15 min paracrystalline arrays appeared within the axons. An increase in the abundance of microfilaments was also observed, but these did not appear to arise from disaggregated microtubules since the increase in microfilament numbers was noted at an incubation time when crystal formation was extensive. Pretreatment of autonomic nerves with colchicine (2.5×10-4 M) caused a reduction of approximately 80% in the numbers of microtubules, but did not prevent the formation of crystals on subsequent exposure to vinblastine. No ultrastructural changes were observed in myofilaments on incubation with vinblastine.
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We gratefully acknowledge the use of the electron microscopes in the Departments of Pathology and of Human Morphology, University of Nottingham School and thank Dr. Graham Robinson and Annette Tomlinson for their co-operation.
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Tomlinson, D.R., Bennett, T. An ultrastructural examination of the action of vinblastine on microtubules, neurofilaments and muscle filaments in vitro . Cell Tissue Res. 166, 413–420 (1976). https://doi.org/10.1007/BF00220136
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DOI: https://doi.org/10.1007/BF00220136