Synthesis and Biological Activity of <scp>d</scp>- and <scp>l</scp>-<i>c</i><i>hiro</i>-Inositol 2,3,4,5-Tetrakisphosphate: Design of a Novel and Potent Inhibitor of Ins(3,4,5,6)P<sub>4</sub> 1-Kinase/Ins(1,3,4)P<sub>3</sub> 5/6-Kinase
作者:Changsheng Liu、Andrew M. Riley、Xiaonian Yang、Stephen B. Shears、Barry V. L. Potter
DOI:10.1021/jm000553k
日期:2001.8.1
The synthesis of a novel and potent Ins(3,4,5,6)P-4 1-kinase/Ins(1,3,4)P-3 5/6 kinase inhibitor and its enantiomer is described. D-chiro-Inositol 2,3,4,5-tetrakisphosphate [D-chiro-Ins(2,3,4,5)P-4, 3, Figure 1] and L-chiro-inositol 2,3,4,5-tetrakisphosphate [L-chiro-Ins(2,3,4,5)P-4, ent-3] were synthesized from D-1,6-di-O-benzyl-chiro-inositol and L-1,6-di-O-benzyl-chiro-inositol, respectively. We examined inhibition of the multifunctional Ins(3,4,5,6)P-4 1-kinase/Ins(1,3,4)P-3 5/6kinase from bovine aorta by 3 and ent-3. Compound 3 was a potent inhibitor with an IC50 of 1.5 muM, and ent-3 was more than 20-fold less active. The results are compared to those for other inhibitory inositol polyphosphates with structure-activity relationship discussion. Compound 3 is a useful lead for development of further inhibitors of this important enzyme, and ent-3 should find applications in the newly emerging Ins(1,4,5,6)P-4 signaling pathway.