Expression of vascular cell adhesion molecule-1 in fibroblastlike synoviocytes after stimulation with tumor necrosis factor.
Rapid expression of mRNA encoding vascular cell adhesion molecule-1 (VCAM-1) was induced by tumor necrosis factor (TNF) in fibroblast-like cells obtained from synovial tissue. Both alternatively spliced forms of VCAM-1 mRNA were detected by polymerase chain reaction in TNF-stimulated fibroblast-like synoviocytes. Western blotting analysis showed that two distinct proteins, reactive with an anti-VCAM-1 anti-sera, were expressed by 2 hours of TNF stimulation in both synoviocytes and human umbilical cord vein endothelial cells (HUVEC). The majority of HUVEC and synoviocytes displayed VCAM-1 surface expression after several hours of TNF stimulation. In contrast, dermal fibroblasts upregulated intercellular adhesion molecule-1 (ICAM-1) but not VCAM-1 expression in response to TNF. These results indicate that VCAM-1 and ICAM-1 expression can be differentially regulated and suggest tissue specific regulation of VCAM-1 expression. Furthermore, these findings may provide an explanation for the chronic retention and activation of long-lived lymphocytes and monocytes, which express VLA-4 (the receptor for VCAM-1), in the synovium in rheumatoid arthritis.
Marlor
C W
CW
Institute for Arthritis and Autoimmunity, Miles Research Center, West Haven, CT 06516.
Webb
D L
DL
Bombara
M P
MP
Greve
J M
JM
Blue
M L
ML
D015815:Cell Adhesion Molecules / Q000235:genetics / Q000378:metabolism*; D002469:Cell Separation; D002478:Cells, Cultured; D005347:Fibroblasts / Q000378:metabolism; D005434:Flow Cytometry; D006801:Humans; D012333:RNA, Messenger / Q000032:analysis; D013268:Stimulation, Chemical; D013583:Synovial Membrane / Q000166:cytology / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*; D019010:Vascular Cell Adhesion Molecule-1
D015815:Cell Adhesion Molecules; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D019010:Vascular Cell Adhesion Molecule-1