Journal
BLOOD
Volume 106, Issue 13, Pages 4184-4190Publisher
AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2005-01-0226
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Bone marrow (BM)-derived circulating endothelial precursor cells (CEPCs) have been reported to incorporate into newly formed blood vessels under physiologic and pathologic conditions. However, it is unknown if CEPCs contribute to lymphangiogenesis. Here we show that in a corneal lymphangiogenesis model of irradiated mice reconstituted with enhanced green fluorescent protein (EGFP)-positive donor bone marrow cells, CEPCs are present in the newly formed lymphatic vessels. Depletion of bone marrow cells by irradiation remarkably suppressed lymphangiogenesis in corneas implanted with fibroblast growth factor-2 (FGF-2). Further, transplantation of isolated EGFP-positive/vascular endothelial growth factor receptor-3-positive (EGFP(+)NEGFR3(+)) or EGFP(+)/VEGFR-2(+)cell populations resulted in incorporation of EGFP(+) cells into the newly formed lymphatic vessels. EGFP(+)/ CEPCs were also present in peritumoral lymphatic vessels of a fibrosarcoma. These data suggest that BM-derived CEPCs may play a role in lymphvasculogenesis.
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