Effect of malotilate (diisopropyl 1,3-dithiol-2-ylidenemalonate) on the protein synthesis in rat liver.

Abstract
The effect of malotilate (diisopropyl-1,3-dithiol-2-ylidenemalonate) on the protein synthesis in rat liver was studied in vivo and in vitro. Oral administration of malotilate to rats caused an increase in the protein and RNA contents of the liver and led to an acceleration of 14C-leucine incorporation into microsomal and cytosol proteins. In a cell-free system the protein synthesis was enhanced by treatment with malotilate, and an unknown factor(s) which participates in the protein synthesis was found in the cytosol fraction prepared from malotilate treated livers. Evidently, malolilate is a new type of inducer for protein synthesis. Malotilate may enhance liver protein synthesis by accelerating RNA synthesis and/or increasing the transport of RNA from nuclei to cytosol in rat liver.