Experimental cerebral malaria develops independently of endothelial expression of intercellular adhesion molecule-1 (icam-1)

J Biol Chem. 2013 Apr 19;288(16):10962-6. doi: 10.1074/jbc.C113.457028. Epub 2013 Mar 14.

Abstract

Cerebral malaria (CM) is a severe clinical complication of Plasmodium falciparum malaria infection and is characterized by a high fatality rate and neurological damage. Sequestration of parasite-infected red blood cells in brain microvasculature utilizes host- and parasite-derived adhesion molecules and is an important factor in the development of CM. ICAM-1, an alternatively spliced adhesion molecule, is believed to be critical on endothelial cells for infected red blood cell sequestration in CM. Using ICAM-1 mutant mice, we found that the full-length ICAM-1 isoform is not required for development of murine experimental CM (ECM) and that ECM phenotype varies with the combination of ICAM-1 isoforms expressed. Furthermore, we observed development of ECM in transgenic mice expressing ICAM-1 only on leukocytes, indicating that endothelial cell expression of this adhesion molecule is not required for disease pathogenesis. We propose that ICAM-1-dependent cellular aggregation, independent of ICAM-1 expression on the cerebral microvasculature, contributes to ECM.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alternative Splicing / genetics
  • Animals
  • Brain* / blood supply
  • Brain* / parasitology
  • Brain* / pathology
  • Cerebrovascular Circulation*
  • Disease Models, Animal
  • Gene Expression Regulation
  • Intercellular Adhesion Molecule-1 / biosynthesis*
  • Intercellular Adhesion Molecule-1 / genetics
  • Malaria, Cerebral / genetics
  • Malaria, Cerebral / metabolism*
  • Malaria, Cerebral / pathology
  • Malaria, Cerebral / physiopathology
  • Mice
  • Mice, Transgenic
  • Microcirculation*
  • Plasmodium falciparum / metabolism*
  • Protein Isoforms / biosynthesis
  • Protein Isoforms / genetics

Substances

  • Protein Isoforms
  • Intercellular Adhesion Molecule-1