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Bovine leukocyte adhesion deficiency: in vitro assessment of neutrophil function and leukocyte integrin expression
Canadian Journal of Veterinary Research = Revue Canadienne de Recherche Vétérinaire (1994)
  • T W Olchowy
  • P N Bochsler
  • Nancy R Neilsen, University of Tennessee, Knoxville
  • Matt Welborn, University of Tennessee, Knoxville
  • D O Slauson
Abstract
Bovine leukocyte adhesion deficiency (BLAD) was identified in a two-month-old Holstein heifer calf using DNA-polymerase chain reaction analysis of the affected calf and other clinical parameters. Neutrophil integrin expression (CD18, CD11a, CD11c), aggregation, and transendothelial migration were studied in vitro. Neutrophils were isolated from the affected calf and from normal, healthy, age-matched control Holstein calves. Neutrophils isolated from the affected BLAD calf had decreased expression of leukocyte integrins on their cell surface, decreased ability to aggregate in response to chemotactic stimuli, and decreased ability to migrate across bovine endothelial cell monolayers in vitro. Transendothelial migration of neutrophils from normal calves was reduced to levels comparable to the BLAD neutrophils by treatment with an anti-CD18 monoclonal antibody (MAb 60.3). Peripheral-blood lymphocytes from the BLAD calf also expressed negligible levels of leukocyte integrins, similar to their neutrophil counterparts. Our experimental findings in vitro correlate well with the clinical observations of decreased leukocyte trafficking and diminished host defense in leukocyte adhesion-deficient animals. The syndrome of BLAD may be a suitable model for one of the human leukocyte adhesion deficiency disorders.
Publication Date
April, 1994
Citation Information
T W Olchowy, P N Bochsler, Nancy R Neilsen, Matt Welborn, et al.. "Bovine leukocyte adhesion deficiency: in vitro assessment of neutrophil function and leukocyte integrin expression" Canadian Journal of Veterinary Research = Revue Canadienne de Recherche Vétérinaire Vol. 58 Iss. 2 (1994)
Available at: http://works.bepress.com/matt_welborn/11/