• 1 January 1976
    • journal article
    • research article
    • Vol. 116  (5) , 1276-1279
Abstract
Transformation of T* [line-1 guinea pig hepatoma cells] to dead cells was prevented by c[cyclic]AMP. The effect of cAMP was dose, time and temperature dependent. T* washed free of cAMP after short-term incubation, proceeded to die to the same extent as control cells. After 3 h of incubation of T* with cAMP, the level of killing was significantly reduced. The 3''5'' cyclic nucleotides of uridine, guanine, cytosine and thymidine and the 2''3'' cyclic adenosine nucleotide were not effective. Prolonged treatment of T* with cAMP irreversibly blocked the damage-producing process or facilitated the repair of damaged sites.