Facile labeling of lipoglycans with quantum dots

Carlos Morales Betanzos, Maria Gonzalez-Moa, Stephen Johnston, Sergei A. Svarovsky

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Bacterial endotoxins or lipopolysaccharides (LPS) are among the most potent activators of the innate immune system, yet mechanisms of their action and in particular the role of glycans remain elusive. Efficient non-invasive labeling strategies are necessary for studying interactions of LPS glycans with biological systems. Here we report a new method for labeling LPS and other lipoglycans with luminescent quantum dots. The labeling is achieved by partitioning of hydrophobic quantum dots into the core of various LPS aggregates without disturbing the native LPS structure. The biofunctionality of the LPS-Qdot conjugates is demonstrated by the labeling of mouse monocytes. This simple method should find broad applicability in studies concerned with visualization of LPS biodistribution and identification of LPS binding agents.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalBiochemical and Biophysical Research Communications
Issue number1
StatePublished - Feb 27 2009


  • Endotoxins
  • Labeling
  • Lipopolysaccharides
  • Monocytes
  • Quantum dots

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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