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Migration of human monocytes in response to vascular endothelial growth factor (VEGF) is mediated via the VEGF receptor flt-1

Barleon, B, Sozzani, S, Zhou, D, Weich, HA, Mantovani, A, Marme, D·1996·Blood

Abstract

Treatment of human monocytes with vascular endothelial growth factor (VEGF) isolated from tumor cell supernatants was reported to induce monocyte activation and migration. In this study we show that recombinant human VEGF165, and VEGF121 had a maximal effect on human monocyte migration at 65 to 250 pmol/L. Chemotactic activity of VEGF165 was inhibited by a specific antiserum against VEGF, by heat treatment of VEGF165, and by protein kinase inhibitors. In addition, we could show that VEGF-stimulated monocyte migration is mediated by a pertussis toxin-sensitive GTP-binding protein. Placenta growth factor (PlGF152), a heparin-binding growth factor related to VEGF, was also chemotactic for monocytes at concentrations between 2.5 and 25 pmol/L. In accordance with these findings, human monocytes showed specific and saturable binding for 125I-VEGF165 (half-maximal binding at 1 to 1.5 nmol/L). Using Northern blot analysis, we further could show that human monocytes express only the gene for the VEGF receptor type, flt-1, but not for the second known VEGF receptor, KDR. Resting monocytes expressed low levels of flt-1 gene only. Brief exposure (2 to 4 hours) of human monocytes to lipopolysaccharide, a prototypic monocyte activator, led to a significant upregulation of the flt-1 mRNA level. The results presented here suggest that monocyte chemotaxis in response to VEGF and most likely to PlGF152 is mediated by flt-1 and thus show a possible function for the VEGF-receptor flt-1.

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Crossref · 10.1182/blood.v87.8.3336.bloodjournal8783336

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Metadata

Authors
Barleon, B., Sozzani, S., Zhou, D., Weich, H., Mantovani, A., & Marme, D.
Venue
Blood
Published
1996-04-15
Volume
87
Issue
8
Pages
3336-3343
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W1600542667
Cited by
1,356
References
0
FWCI
12.00
Type
journal article
Language
en
Open access
closed

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