The prooligonucleotide approach: II. Synthesis and stability studies of chimeric oligonucleotide models

Cell permeation of a Trypanosoma brucei aldolase inhibitor: evaluation of different enzyme-labile phosphate protecting groups

A series of four prodrugs directed against Trypanosoma brucei aldolase bearing various transient enzyme-labile phosphate protecting groups was developed. Herein, we describe the synthesis and evaluation of cell permeation of these prodrugs. The oxymethyl derivative was the most efficient prodrug with a good recovering of the free drug (IC(50)=20 microM) and without any measurable cytotoxicity.

First synthesis of alternating SATE-phosphotriester/phosphodiester prooligonucleotides on solid support

Prooligonucleotides with alternating S-Acyl-ThioEthyl (SATE) phosphotriester and phosphodiester linkages or a gap were synthesized by elimination of cyanoethyl group with non-nucleophilic base DBU. Their half-lives in the presence of Pig Liver Esterases (PLE) and in total cell extract were determined.