Catabolites produced by the deacetylation of hexamethylenebisacetamide play a key role in murine erythroleukaemic-cell differentiation

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Abstract
N-Acetyl-1,6-diaminohexane and 1,6-diaminohexane, formed by deacetylation of the inducer hexamethylenebisacetamide (HMBA), are shown to accumulate rapidly inside murine erythroleukaemic cells. The appearance of these molecules preceded the differentiation-associated changes in intracellular polyamines. A quantitative relationship was observed between the accumulation of these molecules and the changes in intracellular polyamines. In the absence of HMBA, exogenous N-acetyl-1,6-diaminohexane was able not only to cause changes in polyamine biosynthesis, but also to induce the complete differentiation process. These results imply that these catabolites of HMBA are directly responsible for the changes in polyamine biosynthesis and probably also for initiating other events regulatory for the differentiation of these cells.

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