Synthesis, DNA binding and anti-leukemic activity of an aminoacyl nucleolipid

Abstract

The synthesis and characterization of a new class of DNA binding molecule exhibiting potent and selective anti-leukemic activity is described. The synthesis of an aminoacyl nucleolipid was developed from an efficient EEDQ coupling strategy, in which a series of seven bioconjugates were synthesized in yields of 53-78%. Guanosine bioconjugate 7, was used as building block for the synthesis of a target aminoacyl nucleolipid 14. Its GRP78 DNA binding affinity was confirmed by gel shift assay, CD spectroscopy, Tm measurements and dynamic light scattering experiments. Moreover, in a single dose (10 μM) screen against a panel of 60 cancer cell lines, aminoacyl nucleolipid 14 was found to selectively trigger greater than 90% cell death in a SR human leukemia cancer cell line. The reported aminoacyl nucleolipid represents a useful model for a new class of DNA binding molecules for the development of potent and selective anti-cancer agents.

Keywords: Aminoacyl nucleolipid; Anti-leukemic activity; Bioconjugate; GRP78 DNA.