Chemoselective ligation in the functionalization of polysaccharide-based particles

Tristan T. Beaudette, Joel A. Cohen, Eric M. Bachelder, Kyle E. Broaders, Jessica L. Cohen, Edgar G. Engleman, Jean M.J. Fréchet

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


(Chemical Equation Presented) Despite the promise of precisely targeted or otherwise functionalized polymeric particulate drug delivery vehicles, typical biocompatible particles are generally not amenable to facile and selective surface modification. Herein, we report the development of a simple, mild, and chemoselective strategy for the conjugation of biologically active molecules to the surface of dextran-based microparticles. Alkoxyamine-bearing reagents were used to form stable oxime conjugates with latent aldehyde functionality present in reducing carbohydrate chain ends. We demonstrate the functionalization of dextran-based microparticles with a fluorophore as well as a cell-penetrating peptide sequence, which facilitated the delivery of cargo to nonphagocytic cells leading to a 60-fold increase in the expression of a reporter gene when plasmid DNA-loaded particles were used.

Original languageEnglish (US)
Pages (from-to)10360-10361
Number of pages2
JournalJournal of the American Chemical Society
Issue number30
StatePublished - Aug 5 2009
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


Dive into the research topics of 'Chemoselective ligation in the functionalization of polysaccharide-based particles'. Together they form a unique fingerprint.

Cite this