Discovery of GS-9131: Design, synthesis and optimization of amidate prodrugs of the novel nucleoside phosphonate HIV reverse transcriptase (RT) inhibitor GS-9148
2010; Elsevier BV; Volume: 18; Issue: 10 Linguagem: Inglês
10.1016/j.bmc.2010.03.041
ISSN1464-3391
AutoresRichard L. Mackman, Adrian S. Ray, Hon C. Hui, Lijun Zhang, Gabriel Birkuš, Constantine G. Boojamra, Manoj C. Desai, Janet L. Douglas, Ying Gao, Deborah Grant, Geneviève Laflamme, Kuei‐Ying Lin, David Y. Markevitch, Ruchika Mishra, Martin J. McDermott, Rowchanak Pakdaman, Oleg V. Petrakovsky, Jennifer E. Vela, Tomáš Cihlář,
Tópico(s)Biochemical and Molecular Research
ResumoGS-9148 [(5-(6-amino-purin-9-yl)-4-fluoro-2,5-dihydro-furan-2-yloxymethyl)phosphonic acid] 4 is a novel nucleoside phosphonate HIV-1 reverse transcriptase (RT) inhibitor with a unique resistance profile toward N(t)RTI resistance mutations. To effectively deliver 4 and its active phosphorylated metabolite 15 into target cells, a series of amidate prodrugs were designed as substrates of cathepsin A, an intracellular lysosomal carboxypeptidase highly expressed in peripheral blood mononuclear cells (PBMCs). The ethylalaninyl phosphonamidate prodrug 5 (GS-9131) demonstrated favorable cathepsin A substrate properties, in addition to favorable in vitro intestinal and hepatic stabilities. Following oral dosing (3 mg/kg) in Beagle dogs, high levels (>9.0 μM) of active metabolite 15 were observed in PBMCs, validating the prodrug design process and leading to the nomination of 5 as a clinical candidate.
Referência(s)