| First Author | Murakami M | Year | 2008 |
| Journal | Arterioscler Thromb Vasc Biol | Volume | 28 |
| Issue | 4 | Pages | 658-64 |
| PubMed ID | 18174461 | Mgi Jnum | J:149043 |
| Mgi Id | MGI:3847412 | Doi | 10.1161/ATVBAHA.107.150433 |
| Citation | Murakami M, et al. (2008) VEGFR1 tyrosine kinase signaling promotes lymphangiogenesis as well as angiogenesis indirectly via macrophage recruitment. Arterioscler Thromb Vasc Biol 28(4):658-64 |
| abstractText | OBJECTIVE: Angiogenesis and lymphangiogenesis are complex phenomena that involve the interplay of several growth factors and receptors. Recently, we have demonstrated that in Keratin-14 (K14) promoter-driven Vegf-A transgenic (Tg) mice, not only angiogenesis but also lymphangiogenesis is stimulated. However, the mechanism by which VEGFR1 is involved in lymphangiogenesis remains unclear. METHODS AND RESULTS: To examine how important the tyrosine kinase (TK) of VEGFR1 is in lymphangiogenesis in K14 Vegf-A Tg mice, we crossed the K14 Vegf-A Tg mice with VEGFR1-TK-deficient mice to generate double mutant K14 Vegf-A Tg Vegfr1 tk(-/-) mice. K14 Vegf-A Tg Vegfr1 tk(-/-) mice exhibit a remarkable decrease in lymphangiogensis as well as angiogenesis in subcutaneous tissues. To address the mechanism underlying the decrease in lymphangiogensis, we investigated the recruitment of monocyte-macrophage-lineage cells into the skin. The recruitment of VEGFR1-expressing macrophages driven by VEGF-A was reduced in K14 Vegf-A Tg Vegfr1 tk(-/-) mice. Vegf-A Tg mice that received VEGFR1-TK-deficient bone marrow showed a reduction of macrophage recruitment, lymphangiogenesis and angiogenesis compared with those in K14 Vegf-A Tg mice. CONCLUSIONS: VEGFR1 signaling promotes lymphangiogenesis as well as angiogenesis mainly by increasing bone marrow-derived macrophage recruitment. |
