Inhibition of intercellular communication by tumor-promoting phorbol esters.


Cocultures were established of mouse epidermal cells (HEL/37) and mouse fibroblast cells (PG-19) deficient in the enzyme hypoxanthine-guanine phosphoribosyltransferase. Metabolic cooperation between the cocultured cells was detected as labeling of PG-19 cells on incubation of cocultures with [3H]-hypoxanthine. The transfer of label from HEL/37 cells to PG… (More)


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