Survival of Synchronized V79 Cells Treated with X-rays and Cordycepin

Abstract
The survival of V79 Chinese hamster lung cells exposed to X-irradiation is reduced by co-treatment with cordycepin (3''-deoxyadenosine). This reduction is manifested principally by a decrease in the D0 [reciprocal of the slope of the exponential part] of the X-ray survival curve from 199 rad in untreated cells to 106 rad in cordycepin-treated cells. Reduced survival is seen throughout the life-cycle when synchronized cell populations are exposed to both agents with cells in mid-S being especially sensitive.