Transgenic Induction of Vascular Endothelial Growth Factor-C Is Strongly Angiogenic in Mouse Embryos but Leads to Persistent Lymphatic Hyperplasia in Adult Tissues

被引:70
作者
Lohela, Marja [1 ,2 ]
Helotera, Hanna [1 ,2 ]
Haiko, Paula [1 ,2 ]
Dulmont, Daniel J. [3 ]
Alitalo, Kari [1 ,2 ]
机构
[1] Univ Helsinki, Lab Mol Canc Biol, Biomed Helsinki, Dept Pathol,Haartman Inst, FIN-00014 Helsinki, Finland
[2] Univ Helsinki, Helsinki Univ Hosp, FIN-00014 Helsinki, Finland
[3] Sunnybrook & Womens Res Inst, Div Mol & Cellular Biol Res, Toronto, ON, Canada
关键词
D O I
10.2353/ajpath.2008.080378
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Vascular endothelial growth factor-C (VEGF-C) is the quintessential lymphangiogenic growth factor that is required for the development of the lymphatic system and is capable of stimulating lymphangiogenesis in adults by activating its receptor, VEGFR-3. Although VEGF-C is a major candidate molecule for the development of prolymphangiogenic therapy for defective lymphatic vessels in lymphedema, the stability of lymph vessels generated by exogenous VEGF-C administration is not currently known. We studied VEGF-C-stimulated lymphangiogenesis in inducible transgenic mouse models in which growth factor expression can be spatially and temporally controlled without side effects, such as inflammation. VEGF-C induction in adult mouse skin for 1 to 2 weeks caused robust lymphatic hyperplasia that persisted for at least 6 months. VEGF-C induced lymphangiogenesis in numerous tissues and organs when expressed in the vascular endothelium in either neonates or adult mice. Very few or no effects were observed in either blood vessels or collecting lymph vessels. Additionally, VEGF-C stimulated lymphangiogenesis in embryos after the onset of lymphatic vessel development. Strikingly, a strong angiogenic effect was observed after VEGF-C induction in vascular endothelium at any point before embryonic day 16.5. Our results indicate that blood vessels can undergo VEGFG-induced angiogenesis even after down-regulation of VEGFR-3 in embryos; however, transient VEGF-C expression in adults can induce long-lasting lymphatic hyperplasia with no obvious side effects on the blood vasculature. (Am J Pathol 2008, 173:1891-1901; DOI: 10.2353/ajpath.2008.080378)
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页码:1891 / 1901
页数:11
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