Adherence of neutrophils to canine cardiac myocytes in vitro is dependent on intercellular adhesion molecule-1

• Published in: The Journal of clinical investigation 1991-10, Vol.88 (4), p.1216-1223
• Main Authors: WAYNE SMITH, C, ENTMAN, M. L, LANE, C. L, BEAUDET, A. L, TY, T. I, YOUKER, K, HAWKINS, H. K, ANDERSON, D. C
• Format: Article
• Language: English
• Subjects: Animals; Antibodies, Monoclonal - immunology; Base Sequence; Biological and medical sciences; Blood coagulation. Blood cells; Cell Adhesion; Cell Adhesion Molecules - genetics; Cell Adhesion Molecules - physiology; Dogs; Fundamental and applied biological sciences. Psychology; Humans; In Vitro Techniques; Intercellular Adhesion Molecule-1; Lipopolysaccharides; Mice; Molecular and cellular biology; Molecular Sequence Data; Myocardium - cytology; Neutrophils - physiology; RNA, Messenger - analysis; Tumor Necrosis Factor-alpha - pharmacology
• ISSN: 0021-9738; 1558-8238
• DOI: 10.1172/jci115424

The adhesiveness of isolated canine cardiac myocytes for neutrophils is greatly increased by stimulation with cytokines such as tumor necrosis factor alpha (TNF alpha). Since this adhesion is significantly inhibited by an anti-CD18 MAb, experiments were performed to test the hypothesis that the newly expressed adhesion molecule on the cardiac myocytes was intercellular adhesion molecule-1 (ICAM-1). A newly developed MAb, CL18/6, was found to exhibit the functional and binding characteristics with canine neutrophils and canine jugular vein endothelial cells expected of an antibody recognizing ICAM-1. MAb CL18/6 also bound to isolated cardiac myocytes after stimulation of the myocytes with cytokines, and it blocked by greater than 90% the adhesion of neutrophils to stimulated myocytes. A partial cDNA clone for canine ICAM-1 was isolated, and ICAM-1 mRNA was found to be increased in both endothelial cells and cardiac myocytes after cytokine stimulation. Cytokines that both increased the CL18/6-inhibitable adhesion of neutrophils to myocytes and induced expression of ICAM-1 were IL-1 beta, TNF alpha, and LPS. These results are consistent with the conclusion that canine endothelial cells and cardiac myocytes express ICAM-1 in response to cytokine stimulation, and that ICAM-1 functions as an adhesive molecule for neutrophils on both cell types.