| |
|
|
|
|
|
|
|||
|
Blood, 15 August 2008, Vol. 112, No. 4, pp. 1472-1481. Prepublished online as a Blood First Edition Paper on June 9, 2008; DOI 10.1182/blood-2008-01-132035.
Submitted January 9, 2008
Vascular Cell Biology, Max Planck Institute for Molecular Biomedicine, Muenster, Germany * Corresponding author; email: mwild{at}mpi-muenster.mpg.de.
Leukocyte Adhesion Deficiency II (LAD II), also termed Congenital Disorder of Glycosylation IIc (CDG-IIc), is a human disease in which a defective GDP-fucose transporter (SLC35C1) causes developmental defects and an immunodeficiency which is based on the lack of fucosylated selectin ligands. Since the study of in vivo leukocyte trafficking in LAD II patients is experimentally limited we analyzed this process in mice deficient for Slc35c1. We found that E-, L-, and P-selectin-dependent leukocyte rolling in cremaster muscle venules was virtually absent. This was accompanied by a strong, but not complete, decrease in firm leukocyte adhesion. Moreover, neutrophil migration to the inflamed peritoneum was strongly reduced by 89%. Previous reports showed surprisingly normal lymphocyte functions in LAD II which indicated sufficient lymphocyte trafficking to secondary lymphoid organs. We now found that while lymphocyte homing to lymph nodes was reduced to 1-2% in Slc35c1-/- mice, trafficking to the spleen was completely normal. In accordance with this we found a defect in the humoral response to a T cell-dependent antigen in lymph nodes but not in the spleen. Taken together, Slc35c1-/- mice show strongly defective leukocyte trafficking but normal lymphocyte homing to the spleen which may explain normal lymphocyte functions in LAD II.
This article has been cited by other articles:
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Copyright © 2008 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||