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Journal of Cell Science, Vol 17, Issue 3 381-396, Copyright © 1975 by Company of Biologists

JOURNAL ARTICLES

Colchicine resistance in mammalian cell lines

PD Minor and DH Roscoe

Colchicine-resistant variants derived from mouse and Syrian hamster lines are described. The resistant cells do not appear to be true mutants, since they appear at a high frequency, unaffected by treatment with ethyl methyl sulphonate, and are unstable in the absence of the drug. They are cross-resistant to other drugs, show a reduced rate of binding of colchicine in monolayer, and give extracts with colchicine-binding properties identical to those of the wild type. Thus the resistance is due to a permeability barrier. The naturally occurring resistance of the Syrian hamster line is specific for colchicine, and may be due to a specific permeability barrier. The Syrian hamster line is also shown to have an extra colchicine-binding pool.


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© The Company of Biologists Ltd 1975