Colcemid inhibits growth during early G1 in normal but not in tumorigenic lymphocytes

Experimental Cell Research
A L KenterT H Rabbitts

Abstract

Mitogenically stimulated human and mouse lymphocytes enter the cell cycle (G0, G1A, G1B, S, G2+M) via a newly recognized subphase, G1'. This subphase precedes G1A and is distinct from G0. The G1' subphase is absent in immortalized and tumorigenic lymphoblastoid cell lines (LCLs) by cytofluorimetric criteria. Furthermore, colcemid inhibits transition through the G0/G1' as well as G2 phases in mitogen-stimulated lymphocytes and in LCLs. Tumorigenic LCLs are not sensitive to growth inhibition by colcemid during early G1. These observations suggest that a progressive series of changes have occurred during G0/G1' which lead to deregulation of growth control.

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Citations

Dec 1, 1989·Journal of Internal Medicine·B Norberg
Sep 1, 1991·Molecular and Cellular Biology·A L Kenter, J Tredup
Apr 30, 2005·Analytical Chemistry·Sascha SchusterVlada B Urlacher

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