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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
. 1989 Aug;86(16):6358–6362. doi: 10.1073/pnas.86.16.6358

Polar/apolar chemical inducers of differentiation of transformed cells: strategies to improve therapeutic potential.

P A Marks 1, R Breslow 1, R A Rifkind 1, L Ngo 1, R Singh 1
PMCID: PMC297838  PMID: 2762329

Abstract

N,N'-Hexamethylenebisacetamide (HMBA) induces transformed cells to differentiate, accompanied by suppression of oncogenicity. Clinical trials have shown that HMBA can cause positive therapeutic responses in some cancer patients, but clinical efficacy may be limited, in part, by dose-related toxicity. Potential improvements in efficacy may be accomplished by changes in the chemical structure of inducing agents and by increasing the sensitivity of tumor cells to inducers of differentiation. We have previously described an approach to improving tumor cell responsiveness to inducing agents. Transformed cell lines that have acquired low levels of resistance to vincristine display a markedly increased sensitivity to HMBA. We now report on a series of hybrid polar/apolar compounds--some of which are as active as HMBA and several of which are significantly more active than HMBA in vitro--whose chemical structures make it likely that they have different pharmacokinetics. Vincristine-resistant murine erythroleukemia cells also are shown to have marked increased sensitivity to these hybrid polar/apolar compounds. Thus these findings suggest potentially useful strategies for the application of polar/apolar inducers of differentiation to the treatment of cancers. These studies also provide approaches to further understanding of the biological process of terminal differentiation.

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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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