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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1984 Jun;81(12):3770–3772. doi: 10.1073/pnas.81.12.3770

Differentiation of Friend erythroleukemia cells induced by benzodiazepines.

J K Wang, J I Morgan, S Spector
PMCID: PMC345301  PMID: 6587392

Abstract

Many benzodiazepines of the type whose receptors are found in peripheral tissues cause the differentiation of cultured Friend erythroleukemia cells. The maximal level of induction of hemoglobin synthesis is 10-80% of the cells, depending on the compound tested. The induction is concentration and time dependent, requiring micromolar amounts of the drugs and about 5 days of treatment for full expression. The time course is very similar to that observed for a well-studied inducer, dimethyl sulfoxide. The affinities of the agents for the peripheral-type benzodiazepine binding site are not correlated with their capacity to induce differentiation. Also, the biological effect is stereospecific since the (3S) stereoisomer Ro11 -6896 is at least an order of magnitude more potent than its (3R) enantiomer, Ro11 -6893. The benzodiazepine effect exhibits definite structure-activity relationships. A 1-methyl group is an absolute requirement, although this is not sufficient in itself. Hydroxyl and methoxyl groups at the 4' position enhance the biological activity, but 4'-chloro decreases it. Substitutions at the 2', 6', and 4 positions also decrease the biological activity, as does the lack of a 2-carbonyl group. These data suggest that the benzodiazepines act in a specific manner to induce the differentiation of Friend erythroleukemia cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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