Abstract
Murine-virus-infected erythroleukemia cells cultured in a medium with dimethylsulfoxide or N,N-dimethylformamide are induced to differentiate to erythroid cells. A number of highly polar compounds have a similar effect in inducing erythroid differentiation of the virus-infected cells, as assayed by the appearance of hemoglobin. These compounds are 1-methyl-1-2-piperidone, N,N-dimethylacetamide, N-methylpyrrolidinone, N-methylacetamide, 2-pyrrolidinone, propionamide, pyridine-N-oxide, piperidone, N-methylformamide, acetamide, and triethylene glycol. It has been previously reported that dimethylsulfoxide must be present during DNA synthesis and, possibly, shortly therafter, to induce differentiation. These findings are consistent with the hypothesis that dimethylsulfoxide and related polar compounds act by changing the conformation of DNA or a DNA-protein complex, causing an alteration in transcription that leads to the expression of the program of erythroid differentiation.
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