[Pilot study of differentiation of bone marrow derived mesenchymal stem cells into endothelial cells induced by B16 melanoma cells in vitro].
OBJECTIVE
Bone-marrow derived mesenchymal stem cells (BMSC) have the potential to differentiate into endothelial cells. The aim of the study was to investigate the induction process of BMSC by B16 melanoma cells in vitro and to analyze the role of VEGF-a in the process.


METHODS
A co-culture system containing BMSC and B16 melanoma cells based on transwell indirect model was established, and the induction process of BMSC by B16 melanoma cells was studied in vitro.


RESULTS
BMSC were isolated from the bone marrow of C57 mice. BMSC expressed CD105, CD90, CD73, CD44 and CD166, and acquired expressin of endothelial phenotype markers including VEGFR-1, VEGFR-2 and Factor VIII after co-culture with B16 melanoma cells for 48 hours. The expression level of VEGFR-2 would be double and Factor VIII threefold more by extending the co-culture time to 72 hours. In the co-culture system, B16 melanoma cells also up-regulated the expression of VEGF-a.


CONCLUSIONS
VEGF-a plays a significant role in the differentiation of BMSC into cells of endothelial phenotype, therefore, is important to tumor angiogenesis.
Department of Pathology, Tianjin Medical University Cancer Hospital, Tianjin 300070, China.
Chun-Sheng
CS
Ni
Nan
N
Zhao
Tao
T
Sun
Xiu-Lan
XL
Zhao
Xing-Hui
XH
Wang
Qiang
Q
Gu
Bao-Cun
BC
Sun
D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology* / Q000378:metabolism; D002454:Cell Differentiation; D045744:Cell Line, Tumor; D018920:Coculture Techniques; D042783:Endothelial Cells / Q000166:cytology* / Q000378:metabolism; D005169:Factor VIII / Q000378:metabolism; D008297:Male; D008546:Melanoma, Experimental / Q000378:metabolism / Q000473:pathology*; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D010865:Pilot Projects; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism*; D040281:Vascular Endothelial Growth Factor Receptor-1 / Q000378:metabolism; D040301:Vascular Endothelial Growth Factor Receptor-2 / Q000378:metabolism
D042461:Vascular Endothelial Growth Factor A; C467480:vascular endothelial growth factor A, mouse; D005169:Factor VIII; D040281:Vascular Endothelial Growth Factor Receptor-1; D040301:Vascular Endothelial Growth Factor Receptor-2