Cilia Regeneration in Tetrahymena and Its Inhibition by Colchicine

Overview

Journal J Cell Biol

Specialty Cell Biology

Date 1969 Feb 1

PMID 4882889

Citations 60

Authors

J L Rosenbaum

K Carlson

Affiliations

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Abstract

The cilia of Tetrahymena were amputated by the use of a procedure in which the cells remained viable and regenerated cilia. Deciliated cells were nonmotile, and cilia regeneration was assessed by scoring the percentage of motile cells at intervals following deciliation. After a 30-min lag, the deciliated cells rapidly recovered motility until more than 90% of the cells were motile at 70 min after amputation. Cycloheximide inhibited both protein synthesis and cilia regeneration. This indicated that cilia formation in Tetrahymena was dependent on protein synthesis after amputation. Conversely, colchicine was found to inhibit cilia regeneration without affecting either RNA or protein synthesis. This observation suggested the action of colchicine to be an interference with the assembly of ciliary subunit proteins. The finding that colchicine binds to microtubule protein subunits isolated from cilia and flagella (13) supports this possibility. The potential of the colchicine-blocked cilia-regenerating system in Tetrahymena for studying the assembly of microtubule protein subunits during cilia formation and for isolating ciliary precursor proteins is discussed.

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