Synthesis and biological evaluation of sialyl-oligonucleotide conjugates targeting leukocyte B trans-membranal receptor CD22 as delivery agents for nucleic acid drugs.

Abstract

Antisense oligonucleotides (ASOs) modified with ligands which target cell surface receptors have the potential to significantly improve potency in the target tissue. This has recently been demonstrated using triantennary N-acetyl d-galactosamine conjugated ASOs. CD22 is a cell surface receptor expressed exclusively on B cells thus presenting an attractive target for B cell specific delivery of drugs. Herein, we reported the synthesis of monovalent and trivalent ASO conjugates with biphenylcarbonyl (BPC) modified sialic acids and their study as ASO delivery agents into B cells. CD22 positive cells exhibited reduced potency when treated with ligand modified ASOs and mechanistic examination suggested reduced uptake into cells potentially as a result of sequestration of ASO by other cell-surface proteins.

DOI: 10.1016/j.bmc.2016.03.047

Cite this paper

@article{StPierre2016SynthesisAB, title={Synthesis and biological evaluation of sialyl-oligonucleotide conjugates targeting leukocyte B trans-membranal receptor CD22 as delivery agents for nucleic acid drugs.}, author={Gabrielle St-Pierre and Sudip ranjan Pal and Michael E. \Ostergaard and Tianyuan Zhou and Jinghua Yu and Michael Tanowitz and Punit P. Seth and Stephen Hanessian}, journal={Bioorganic & medicinal chemistry}, year={2016}, volume={24 11}, pages={2397-409} }