Rapidly reversible hydrophobization: an approach to high first-pass drug extraction.
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Monahan SD, Subbotin VM, Budker VG, Slattum PM, Neal ZC, Herweijer H, Wolff JA
Rapidly reversible hydrophobization: an approach to high first-pass drug extraction.
Chem Biol. 2007 Sep;14(9):1065-77.
- PubMed ID
- 17884638 [ View in PubMed]
- Abstract
We have investigated a rapidly reversible hydrophobization of therapeutic agents for improving first-pass uptake in locoregional drug therapy. This approach involves the attachment of a hydrophobic moiety to the drug by highly labile chemical linkages that rapidly hydrolyze upon injection. Hydrophobization drastically enhances cell-membrane association of the prodrug and, consequently, drug uptake, while the rapid lability protects nontargeted tissues from exposure to the highly active agent. Using the membrane-impermeable DNA intercalator propidium iodide, and melphalan, we report results from in vitro cellular internalization and toxicity studies. Additionally, we report in vivo results after a single liver arterial bolus injection, demonstrating both tumor targeting and increased survival in a mouse tumor model.