Reduction of monocyte adhesion to xenogeneic tissue by endothiliazation: An adhesion molecule and time-dependent mechanism

Byline: C. Gillis, L. Bengtsson, A. Haegerstrand Abstract: Great interest has been shown for the seeding of autologous endothelial cells on prosthetic materials. We investigated the inflammatory and immunogenic properties of xenogeneic tissue before and after seeding with cultured human great saphenous vein endothelial cells in vitro. Adhesion of monocytes to xenogeneic tissue with or without endothelium and the endothelial cell expression of E-selectin, intercellular adhesion molecule 1, vascular adhesion molecule 1, and major histocompatibility complex class II antigens were investigated 1, 3, and 7 days after seeding. Both monocyte adhesion and endothelial adhesion molecule expression were relatively high 1 day after seeding and were significantly lowered after 3 to 7 days. There was no difference between monocyte adhesion and adhesion molecule expression on viable or nonviable xenogeneic tissue. Monocyte adhesion and adhesion molecule expression increased after interleukin-1[beta] or interferon-[gamma] stimulation of the endothelial cells. The results suggest that human endothelial cells exhibit an early proinflammatory and immunogenic activity immediately after seeding. Three and 7 days after seeding, the endothelialized surface is less adhesive for monocytes as compared with nonendothelialized tissue. These findings have implications when cultured or intraoperatively recruited endothelial cells are used clinically. (J THORAC CARDIOVASC SURG 1995;110:1583-9) Author Affiliation: Stockholm and Huddinge, Sweden Article History: Received 2 December 1994; Accepted 29 March 1995 Article Note: (footnote) [star] From the Department of Neuroscience, Karolinska Institute, Stockholm, a and the Division of Cardiothoracic Surgery, Huddinge Hospital, Huddinge, b Sweden., [star][star] Supported by grants from the Swedish Heart Lung Foundation, the King Gustaf V's and Queen Victoria Foundation, the Swedish MRC (grant No. 7126), the Fredrik and Ingrid Thuring Foundation, the Swedish Society for Medical Research, the Memorial Foundation of Karl Jeppsson's memory, and the Memorial Foundation of R. and E. Lundstrom., a Address for reprints: Caroline Gillis, MD, Karolinska Institute, Department of Neuroscience, Doktorsringen 17, S-171 77 Stockholm, Sweden., aa 0022-5223/95 $5.00 + 0, acents 12/1/65203