Details

Autor(en) / Beteiligte

• Eppihimer, Michael J
• Russell, Janice
• Anderson, Donald C
• Wolitzky, Barry A
• Granger, D. Neil

Titel

Endothelial cell adhesion molecule expression in gene-targeted mice

Ist Teil von

• American journal of physiology. Heart and circulatory physiology, 1997-10, Vol.273 (4), p.H1903-H1908

Ort / Verlag

United States

Erscheinungsjahr

1997

Quelle

MEDLINE

Beschreibungen/Notizen

• 1  Department of Molecular and Cellular Physiology, Louisiana State University Medical Center, Shreveport, Louisiana 71130; 2  Discovery Research, Pharmacia and Upjohn Inc., Kalamazoo, Michigan 49001; and 3  Division of Inflammation/Autoimmune Diseases, Hoffmann-La Roche Inc., Nutley, New Jersey 07110 Gene-targeted mice are now routinely employed as tools for defining the contribution of different leukocyte and endothelial cell adhesion molecules to the leukocyte recruitment and tissue injury associated with acute and chronic inflammation. The objective of this study was to determine whether gene-targeted mice that are deficient in CD11/CD18, intracellular adhesion molecule-1 (ICAM-1), or P-selectin exhibit an altered constitutive or induced expression of the endothelial cell adhesion molecules E- and P-selectin. The gene-targeted mice were all developed in the 129Sv mouse strain and backcrossed into C57Bl/6J mice. The number of backcrosses ranged between 8 (P-selectin) and 10 (CD18 and ICAM-1) generations. The dual-radiolabeled monoclonal antibody technique was used to quantify E- and P-selectin expression in different vascular beds. In the unstimulated state, E-selectin expression was significantly elevated (relative to wild-type mice) in the stomach, large intestine, and brain of mutants deficient in ICAM-1. In general, constitutive expression of P-selectin did not differ between wild-type, ICAM-1-deficient, and CD11/CD18-deficient mutants. In CD11/CD18-deficient mice, tumor necrosis factor- (TNF- ) administration elicited a more profound upregulation of P-selectin in several vascular beds, compared with wild-type and ICAM-1-deficient mice. E-selectin expression in brain of TNF- -stimulated, ICAM-1-deficient, and P-selectin-deficient mice was attenuated compared with wild-type mice. These findings indicate that chronic deficiency of some of the adhesion glycoproteins that mediate leukocyte recruitment alters basal and induced surface expression of other adhesion molecules on endothelial cells. 2 -integrins; E-selectin; P-selectin; intracellular adhesion molecule-1