Intravital microscopy comparing T lymphocyte trafficking to the spleen and the mesenteric lymph node

Mitchell H. Grayson, Richard S. Hotchkiss, Irene E. Karl, Michael J. Holtzman, David D. Chaplin

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Lymphocyte rolling velocity is determined largely by interactions between leukocyte α4-integrin (CD49d) and L-selectin and mucosal addressin cell adhesion molecule-1 (MAdCAM-1) in mesenteric postcapillary venules and Peyer's patch high endothelial venules (HEVs). The role of these interactions in other tissue sites of lymphocyte emigration is not known. With the use of real-time intravital confocal microscopy, we found that rolling velocities of T lymphocytes in the murine mesenteric lymph node (MLN) HEV also depend on L-selectin and CD49d. However, in the murine spleen, rolling velocities of T lymphocytes are not influenced by the loss of L-selectin and CD49d. With the use of FITC-dextran and TIE2-GFP mice, we further defined the microvascular compartments of the spleen and showed that adherence of T cells is localized to regions in the white pulp that are not lined by endothelial cells and have shear rates similar to bone marrow sinusoids. These results establish that T cell trafficking to the spleen differs from trafficking to other secondary lymphoid organs and suggest that the mechanical properties of the blood-filtering role of the spleen are important in T cell accumulation in the organ.

Original languageEnglish
Pages (from-to)H2213-H2226
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume284
Issue number6 53-6
DOIs
StatePublished - Jun 1 2003

Keywords

  • Cell adhesion molecule
  • Hemodynamic parameters
  • Lymphocyte rolling
  • Microvascular vessels

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