VEGFR-3 is expressed on megakaryocyte precursors in the murine bone marrow and plays a regulatory role in megakaryopoiesis
VEGFR-3 is a transmembrane receptor tyrosine kinase that is activated by its ligands VEGF-C and VEGF-D. Although VEGFR-3 has been linked primarily to the regulation of lymphangiogenesis, in the present study, we demonstrate a role for VEGFR-3 in megakaryopoiesis. Using a human erythroleukemia cell l...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
July 13, 2012
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| In: |
Blood
Year: 2012, Volume: 120, Issue: 9, Pages: 1899-1907 |
| ISSN: | 1528-0020 |
| DOI: | 10.1182/blood-2011-09-376657 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1182/blood-2011-09-376657
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| Author Notes: | Wilko Thiele, Jaya Krishnan, Melanie Rothley, Debra Weih, Diana Plaumann, Vanessa Kuch, Luca Quagliata, Herbert A. Weich, and Jonathan P. Sleeman |
| Summary: | VEGFR-3 is a transmembrane receptor tyrosine kinase that is activated by its ligands VEGF-C and VEGF-D. Although VEGFR-3 has been linked primarily to the regulation of lymphangiogenesis, in the present study, we demonstrate a role for VEGFR-3 in megakaryopoiesis. Using a human erythroleukemia cell line and primary murine BM cells, we show that VEGFR-3 is expressed on megakaryocytic progenitor cells through to the pro-megakaryoblast stage. Functionally, specific activation of VEGFR-3 impaired the transition to polyploidy of CD41(+) cells in primary BM cultures. Blockade of VEGFR-3 promoted endoreplication consistently. In vivo, long-term activation or blockade of VEGFR-3 did not affect steady-state murine megakaryopoiesis or platelet counts significantly. However, activation of VEGFR-3 in sublethally irradiated mice resulted in significantly elevated numbers of CD41(+) cells in the BM and a significant increase in diploid CD41(+) cells, whereas the number of polyploid CD41(+) cells was reduced significantly. Moreover, activation of VEGFR-3 increased platelet counts in thrombopoietin-treated mice significantly and modulated 5-fluorouracil-induced thrombocytosis strongly, suggesting a regulatory role for VEGFR-3 in megakaryopoiesis. |
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| Item Description: | Gesehen am 18.04.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1528-0020 |
| DOI: | 10.1182/blood-2011-09-376657 |