Effects of cytokines on the expression of cell adhesion molecules by cultured human omental mesothelial cells.
Cultured mesothelial cells (HOMES) are very responsive to the proinflammatory cytokines, interleukin (IL)-1 and tumor necrosis factor-alpha (TNF-alpha). E-selectin, ICAM-1 and VCAM-1 are known to play an important role, because they are presented by diverse cell types, for example endothelial cells (ECs), and interact with co-responding ligands on white blood cell membranes. In this study, the expression of ICAM-1, VCAM-1, E-selectin as well as PECAM-1 on cultured HOMES was studied over 5, 24, 48 and 72 h exposure to IL-1 beta, interferon-gamma and TNF-alpha. In previous studies we have shown that IL-1 beta and TNF-alpha increase the expression of ICAM-1, E-selectin and VCAM-1 on the cytoplasmatic membranes of HUVECs, HSVECs and HAFECs (ECs from human umbilical vein, saphenous vein and femoral artery, respectively). Using a comparative quantitative cell enzyme immunoassay, we found that expression of the adhesion molecules ICAM-1 and VCAM-1 was significantly increased on HOMES in a dose- and time-dependent manner, compared to nonstimulated cells. Thus, ICAM-1 increased dramatically after 5 h incubation with TNF-alpha. Values of about 450% of the control level were measured. VCAM-1 was similarly stimulated after 24 h incubation with the same cytokine, although its level of expression was significantly lower than that of ICAM-1. In contrast to findings in the literature, VCAM-1 was not found to be expressed constitutively. E-selectin was neither constitutively expressed nor markedly inducible on HOMES. Only weak expression was found after 24 h incubation with high-dose IL-1 beta. PECAM-1 was expressed constitutively, as became evident in antibody dilution studies. These data indicate that HOMES respond to inflammatory stimuli, in some ways in a similar fashion to vascular endothelial cells, but also show a specific pattern of antigen presentation. The results are important for a better understanding of inflammatory processes in serous cavities. The data are also relevant for the improvement of antithrombogenous surfaces of the lumina of vascular prostheses by cell seeding.
Klein
C L
CL
Institute of Pathology, Johannes Gutenberg-University, Mainz, Germany.
Bittinger
F
F
Skarke
C C
CC
Wagner
M
M
Köhler
H
H
Walgenbach
S
S
Kirkpatrick
C J
CJ
D015815:Cell Adhesion Molecules / Q000096:biosynthesis / Q000187:drug effects* / Q000235:genetics; D002478:Cells, Cultured; D016207:Cytokines / Q000494:pharmacology*; D019040:E-Selectin / Q000096:biosynthesis / Q000187:drug effects / Q000235:genetics; D004847:Epithelial Cells; D019084:Fluorescent Antibody Technique, Indirect; D006801:Humans; D007124:Immunoenzyme Techniques; D016130:Immunophenotyping; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis / Q000187:drug effects / Q000235:genetics; D008856:Microscopy, Fluorescence; D009852:Omentum; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000096:biosynthesis / Q000187:drug effects / Q000235:genetics; D013997:Time Factors
D015815:Cell Adhesion Molecules; D016207:Cytokines; D019040:E-Selectin; D019408:Platelet Endothelial Cell Adhesion Molecule-1; D018799:Intercellular Adhesion Molecule-1