Differential monocyte adhesion and adhesion molecule expression in venous and arterial endothelial cells.
We compared U-937 cell adhesion and adhesion molecule expression in human umbilical venous (HUVECs) and arterial (HUAECs) endothelial cells exposed to tumor necrosis factor (TNF), interleukin-1, and lipopolysaccharide (LPS). TNF and LPS stimulated vascular cell adhesion molecule (VCAM)-1 surface expression and adhesion of U-937 monocyte-like cells to HUVECs but not to HUAECs. Antibody studies demonstrated that in HUVECs at least 75% of the adhesion response is VCAM-1 mediated. Interleukin-1 stimulated U-937 cell adhesion to and VCAM-1 surface expression in both HUVECs and HUAECs. Pyrrolidinedithiocarbamate and the proteasome inhibitor MG-132 blocked TNF- and LPS-stimulated U-937 cell adhesion to HUVECs. These agents also significantly decreased TNF- and LPS-stimulated increases in HUVEC surface VCAM-1. TNF increased VCAM-1 protein and mRNA in HUVECs that was blocked by pyrrolidinedithiocarbamate. However, neither TNF or LPS stimulated VCAM-1 expression in HUAECs. TNF stimulated expression of both intercellular adhesion molecule-1 and E-selectin in HUVECs, but in HUAECs, only intercellular adhesion molecule-1 was increased. Electrophoretic mobility shift assays demonstrated no difference in the pattern of TNF-stimulated nuclear factor-kappaB activation between HUVECs and HUAECs. These studies demonstrate a novel and striking insensitivity of arterial endothelium to the effects of TNF and LPS and indicate a dissociation between the ability of HUAECs to upregulate nuclear factor-kappaB and VCAM-1.
Kalogeris
T J
TJ
Department of Surgery, Louisiana State University Medical Center, Shreveport, Louisiana 71130, USA.
Kevil
C G
CG
Laroux
F S
FS
Coe
L L
LL
Phifer
T J
TJ
Alexander
J S
JS
D001158:Arteries / Q000166:cytology / Q000502:physiology*; D002448:Cell Adhesion / Q000502:physiology; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D002460:Cell Line; D004730:Endothelium, Vascular / Q000166:cytology / Q000502:physiology*; D006801:Humans; D008070:Lipopolysaccharides / Q000494:pharmacology; D009000:Monocytes / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D016328:NF-kappa B / Q000502:physiology; D012333:RNA, Messenger / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D019010:Vascular Cell Adhesion Molecule-1 / Q000235:genetics / Q000378:metabolism; D014680:Veins / Q000166:cytology / Q000502:physiology*
D015815:Cell Adhesion Molecules; D008070:Lipopolysaccharides; D016328:NF-kappa B; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D019010:Vascular Cell Adhesion Molecule-1