Abstract
The effects of dexamethasone on the cell kinetics of a rapidly growing syngeneic B cell malignant lymphoma in Balb/c mice have been studied. Growth curves, stathmokinetic studies and frequency of labelled mitoses (FLM) experiments were performed in groups of dexamethasone treated and control animals. These studies showed that tumour growth was arrested after 8 days treatment at which time the tumour weights were approximately half those of control animals. Dexamethasone increased the duration of the cell cycle with a particular increase in the duration of DNA synthesis. The results indicated that the effect on tumour growth could be attributed to a reduction in the growth fraction.
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