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Taxol Induces Postmitotic Myoblasts to Assemble Interdigitating Microtubule-Myosin Arrays That Exclude Actin Filaments

Taxol has the following effects on myogenic cultures: (a) it blocks cell replication of presumptive myoblasts and fibroblasts. (b) It induces the aggregation of microtubules into sheets or massive cables in presumptive myoblasts and fibroblasts, but not in postmitotic, mononucleated myoblasts. (c) I...

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Bibliographic Details
Published in:The Journal of cell biology 1981-08, Vol.90 (2), p.300-308
Main Authors: Antin, Parker B., Forry-Schaudies, Suzanne, Friedman, Thea M., Tapscott, S. J., Holtzer, Howard
Format: Article
Language:English
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Summary:Taxol has the following effects on myogenic cultures: (a) it blocks cell replication of presumptive myoblasts and fibroblasts. (b) It induces the aggregation of microtubules into sheets or massive cables in presumptive myoblasts and fibroblasts, but not in postmitotic, mononucleated myoblasts. (c) It induces normally elongated postmitotic myoblasts to form stubby, star-shaped cells. (d) It reversibly blocks the fusion of the star-shaped myoblasts into multinucleated myotubes. (e) It augments the number of microtubules in postmitotic myoblasts, and these are assembled into interdigitating arrays of microtubules and myosin filaments. (f) Actin filaments are largely excluded from these interdigitating microtubule-myosin complexes. (g) The myosin filaments in the interdigitating microtubule-myosin arrays are aligned laterally, forming A-bands ∼1.5 μm long.
ISSN:0021-9525
1540-8140
DOI:10.1083/jcb.90.2.300