Abstract
Abstract Human endothelial cells and dermal fibroblasts both expressed a membrane-associated interleukin 1 (IL-1) activity when stimulated with either recombinant tumor necrosis factor (TNF) or recombinant lymphotoxin but stimulated endothelial cells expressed significantly more membrane IL-1 per cell than did fibroblasts. Lipopolysaccharide induced membrane IL-1 activity on endothelial cells but not fibroblasts. Interferon-gamma treatment of endothelial cells and fibroblasts had no direct effect on membrane IL-1 expression and little effect when used as a pretreatment for TNF or lipopolysaccharide stimulation. Endothelial cell membrane IL-1 activity was induced within 24 hr of culture with TNF or lipopolysaccharide, and increased up to 72 hr of incubation. Antibodies raised against human monocyte-derived IL-1 species neutralized the membrane IL-1 activity of TNF-stimulated endothelial cells. Both absorption studies and neutralization with specific sera indicated that endothelial cell membrane IL-1 is structurally related to IL-1 alpha. Endothelial cells expressed both IL-1 alpha and IL-1 beta mRNA in response to TNF, lymphotoxin, and recombinant IL-1 species, as detected by Northern blot analysis. These studies demonstrate that endothelial cells can be activated to express a cell-surface IL-1 activity which is structurally, as well as functionally, related to the secreted form of IL-1.
Dates
Type | When |
---|---|
Created | 2 years, 8 months ago (Dec. 31, 2022, 12:17 a.m.) |
Deposited | 5 months ago (March 31, 2025, 4:44 p.m.) |
Indexed | 3 months, 1 week ago (May 20, 2025, 9:21 a.m.) |
Issued | 37 years, 11 months ago (Oct. 1, 1987) |
Published | 37 years, 11 months ago (Oct. 1, 1987) |
Published Online | 37 years, 11 months ago (Oct. 1, 1987) |
Published Print | 37 years, 11 months ago (Oct. 1, 1987) |
@article{Kurt_Jones_1987, title={Membrane interleukin 1 induction on human endothelial cells and dermal fibroblasts.}, volume={139}, ISSN={1550-6606}, url={http://dx.doi.org/10.4049/jimmunol.139.7.2317}, DOI={10.4049/jimmunol.139.7.2317}, number={7}, journal={The Journal of Immunology}, publisher={Oxford University Press (OUP)}, author={Kurt-Jones, E A and Fiers, W and Pober, J S}, year={1987}, month=oct, pages={2317–2324} }