Sialic acids acquired by Pseudomonas aeruginosa are involved in reduced complement deposition and siglec mediated host-cell recognition

FEBS Lett. 2010 Feb 5;584(3):555-61. doi: 10.1016/j.febslet.2009.11.087. Epub 2009 Nov 27.


The opportunism of Pseudomonas aeruginosa (PA) in immunocompromised hosts prompted us to explore the potential role of sialic acids (Sia) in this phenomenon. Culture of PA in the presence of exogenous Sia resulted in linkage-specific incorporation of Sia which was associated with decreased complement deposition on the bacteria. Sia acquired by PA mediated enhanced binding of bacteria to recombinant-CHO cells expressing human siglec-7 or siglec-9, as well as to human NK-cells and monocytes naturally expressing these siglecs. Therefore, Sia may be acquired by PA in the host and contribute to bacterial pathogenicity and host-cell interactions via reduction of complement deposition and siglec-dependent recognition.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, CD / metabolism*
  • Antigens, Differentiation, Myelomonocytic / metabolism*
  • Bacterial Adhesion / physiology
  • CHO Cells
  • Cricetinae
  • Cricetulus
  • Humans
  • Lectins / metabolism*
  • Pseudomonas aeruginosa / metabolism*
  • Pseudomonas aeruginosa / pathogenicity
  • Sialic Acid Binding Immunoglobulin-like Lectins
  • Sialic Acids / metabolism*


  • Antigens, CD
  • Antigens, Differentiation, Myelomonocytic
  • Lectins
  • SIGLEC7 protein, human
  • SIGLEC9 protein, human
  • Sialic Acid Binding Immunoglobulin-like Lectins
  • Sialic Acids