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The Journal of Cell Biology, Vol 51, 752-762, Copyright © 1971 by Rockefeller University Press

ARTICLE

THE ROLE OF THREE CYTOPLASMIC FIBERS IN BHK-21 CELL MOTILITY

: I. Microtubules and the Effects of Colchicine



Robert D. Goldman 1

1 From the Department of Biology, Case Western Reserve University, Cleveland, Ohio 44106

Microtubule breakdown in the presence of 5 or 40 µg/ml of colchicine is observed in BHK-21/C13 fibroblast-like cells. Several morphological and physiological effects are noted in the absence of microtubules: (a) the cells transform from fibroblast-like to epithelial-like cells; (b) the normal pattern of intracellular birefringence changes and a juxtanuclear cap of birefringent filaments is formed; (c) time-lapse cinematography demonstrates that cell locomotion is inhibited in colchicine-treated cells, even though membrane ruffling persists. The results are discussed in terms of the specific roles of microtubules in cultured cell motility and possible functional relationships of the three types of cytoplasmic fibers seen in BHK-21 cells.

Submitted on May 20, 1971
Revised on June 30, 1971


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