Novel Type of Prodrug Activation through a Long-Range O,N-Acyl Transfer: A Case of Water-Soluble CREB Inhibitor.

Abstract:

:CREB (cAMP response element binding protein) has been shown to play an important role in tumor initiation, progression, and metastasis. We discovered that naphthol AS-E, a cell-permeable CREB inhibitor, presented antiproliferative activity in a broad panel of cancer cell lines in vitro. However, it has limited aqueous solubility. In this report, we described a water-soluble inhibitor (compound 6) of CREB-mediated gene transcription with in vivo anticancer activity. Unexpectedly, compound 6 was found to be a prodrug of compound 12 necessitating an unprecedented long-range O,N-acyl transfer. The rate of this transfer was pH- and temperature-dependent. To the best of our knowledge, this is the first time to show that a long-range O,N-acyl transfer could be exploited as a prodrug activation strategy to improve aqueous solubility. This type of prodrug may be applicable to other structures with spatially arranged hydroxyl amide to improve their aqueous solubility.

journal_name

ACS Med Chem Lett

authors

Li BX,Xie F,Fan Q,Barnhart KM,Moore CE,Rheingold AL,Xiao X

doi

10.1021/ml500330n

subject

Has Abstract

pub_date

2014-08-22 00:00:00

pages

1104-9

issue

10

issn

1948-5875

journal_volume

5

pub_type

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