4.7 Article

Transcriptional profiling of VEGF-A and VEGF-C target genes in lymphatic endothelium reveals endothelial-specific molecule-1 as a novel mediator of lymphangiogenesis

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BLOOD
卷 112, 期 6, 页码 2318-2326

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AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2008-05-156331

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资金

  1. National Institutes of Health [CA69184, CA86410]
  2. Swiss National Fund [3100A0108207]
  3. Austrian Science Foundation [S9408-B11]
  4. Cancer League Zurich
  5. Commission of the European Communities [LSHC-CT-2005-518178]

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Lymphatic vessel growth and activation, mediated by vascular endothelial growth factor (VEGF)-C and/or VEGF-A, have important roles in metastasis and in chronic inflammation. We aimed to comprehensively identify downstream molecular targets induced by VEGF-A or VEGF-C in lymphatic endothelium by analyzing the time-series transcriptional profile of treated human dermal lymphatic endothelial cells (LECs). We identified a number of genes, many not previously known to be involved in lymphangiogenesis, that were characterized either as early response genes, transiently induced genes, or progressively induced genes. Endothelial-specific molecule-1 (ESM-1) was one of the genes that were most potently induced by both VEGF-A and VEGF-C. Whereas ESM-1 induction by VEGF-A was mainly dependent on activation of VEGFR-2, VEGF-C-mediated induction depended on the activity of both VEGFR-2 and VEGFR-3. Incubation of LECs with ESM-1 increased the stimulatory effects of both VEGF-A and VEGF-C on LEC proliferation and migration, whereas ESM-1 alone had no effect. Importantly, VEGF-A (or VEGF-C) induction of LEC proliferation and migration were significantly inhibited by siRNA-mediated silencing of ESM-1 in vitro and in vivo. These studies reveal ESM-1 as a novel mediator of lymphangiogenesis and as a potential target for the inhibition of pathologic lymphatic vessel activation.

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