Purine-rich foods have long been suspected as a major cause of hyperuricemia. We hypothesized that inhibition of human concentrative nucleoside transporter 2 (hCNT2) would suppress increases in serum urate levels derived from dietary purines. To test this hypothesis, the development of potent hCNT2 inhibitors was required. By modifying adenosine, an hCNT2 substrate, we successfully identified 8-aminoadenosine derivatives as a new class of hCNT2 inhibitors. Compound 12 moderately inhibited hCNT2 (IC50 = 52 +/- 3.8 mu M), and subsequent structure-activity relationship studies led to the discovery of compound 48 (IC50 = 0.64 +/- 0.19 mu M). Here we describe significant findings about structural requirements of 8-aminoadenosine derivatives for exhibiting potent hCNT2 inhibitory activity.
Exploiting Protein Conformational Change to Optimize Adenosine-Derived Inhibitors of HSP70
作者:Matthew D. Cheeseman、Isaac M. Westwood、Olivier Barbeau、Martin Rowlands、Sarah Dobson、Alan M. Jones、Fiona Jeganathan、Rosemary Burke、Nadia Kadi、Paul Workman、Ian Collins、Rob L. M. van Montfort、Keith Jones
DOI:10.1021/acs.jmedchem.5b02001
日期:2016.5.26
importance in oncology, this protein has become a popular target for drug discovery, efforts which have as yet brought little success. This study demonstrates that adenosine-derived HSP70 inhibitors potentially bind to the protein with a novel mechanism of action, the stabilization by desolvation of an intramolecular salt-bridge which induces a conformationalchange in the protein, leading to high affinity