Spontaneous and 5-azacytidine-induced reexpression of ornithine carbamoyl transferase in hepatoma cells.

AUTOR(ES)
RESUMO

Rat hepatoma cells that do not synthesize the hepatic enzyme ornithine carbamoyl transferase spontaneously give rise to producing cells at a low frequency. Reexpression of this differentiation trait is strongly increased by 5-azacytidine treatment, suggesting that hypermethylation plays a critical role in the impaired expression of the ornithine carbamoyl transferase gene in hepatoma cells.

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