Variability in E-selectin expression, mRNA levels and sE-selectin release between endothelial cell lines and primary endothelial cells.
Endothelial cell lines express markers and are assumed to exhibit other endothelial cell responses. We investigated E-selectin expression from human umbilical vein endothelial cells, the spontaneously transformed ECV304 line and the hybrid line EA.hy926 by flow cytometry and immunofluorescence, mRNA and soluble E-selectin release. In cells exposed to tumour necrosis factor alpha (TNF-alpha) and interleukin-1beta (IL-1beta), median (range) percentage of E-selectin-positive HUVECs increased from 1.6(0.9-6. 2)% to 91.4(83.0-96.1)%, (P=0.001) using flow cytometry. In contrast, E-selectin expression by ECV304 and EA.hy926 cell lines was 100-fold lower. E-selectin mRNA was detectable after 2 h, maximal at 6 h in HUVECs and undetectable in EA.hy926 and ECV304 cell lines after exposure to TNF-alpha/IL-1beta. sE-selectin accumulation increased (P=0.004) in HUVECs only. Neutrophil adherence to ECV304 and EA.hy926 cells was poor compared to HUVECs (P=0.004). The cell lines ECV304 and EA.hy926 do not exhibit normal endothelium expression of E-selectin, and may not be appropriate for studies of adhesion.
Galley
H F
HF
Academic Unit of Anaesthesia and Intensive Care, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, U.K. h.f.galley@abdn.ac.uk
Blaylock
M G
MG
Dubbels
A M
AM
Webster
N R
NR
D002448:Cell Adhesion; D002460:Cell Line; D002478:Cells, Cultured; D019040:E-Selectin / Q000096:biosynthesis*; D004730:Endothelium, Vascular / Q000378:metabolism*; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology; D009504:Neutrophils / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D014470:Umbilical Cord / Q000378:metabolism; D014841:von Willebrand Factor / Q000096:biosynthesis
D019040:E-Selectin; D007375:Interleukin-1; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D014841:von Willebrand Factor