TY - JOUR
T1 - Fibroblast growth factor-2 supports ex vivo expansion and maintenance of osteogenic precursors from human bone marrow
AU - Martin, Ivan
AU - Muraglia, Anita
AU - Campanile, Giuliano
AU - Cancedda, Ranieri
AU - Quarto, Rodolfo
PY - 1997
Y1 - 1997
N2 - We have investigated the effects of different growth factors on the proliferation and osteogenic potential of primary cultures of human bone marrow stromal cells (BMSC). Fibroblast growth factor (FGF)-2 was the most effective in promoting growth of these cells in vitro. The size of colonies formed in clonal conditions was approximately 2.5 times larger in presence of FGF-2. Also the morphology of BMSC was affected: cells cultured in 10% FCS alone became flattened, whereas FGF-2 expanded cells maintained a fibroblast- like elongated phenotype. Levels of alkaline phosphatase activity in BMSC expanded with FGF-2 were significantly lower (56%) than control and, after stimulation with ascorbic acid, βGlycerophosphate and dexamethasone, FGF-2 expanded BMSC deposited approximately 3-fold more mineralized matrix than control cells. We have assessed osteogenicity of BMSC on hydroxyapatite porous scaffolds (bioceramics) by an ectopic bone formation assay. FGF-2 expanded BMSC yielded a higher bone formation (>20-fold) than control cells. We conclude that FGF-2, promoting BMSC proliferation, maintains cells in a more immature state allowing in vitro expansion of human osteoprogenitors which, associated with bioceramics, can differentiate in vivo and form bone tissue.
AB - We have investigated the effects of different growth factors on the proliferation and osteogenic potential of primary cultures of human bone marrow stromal cells (BMSC). Fibroblast growth factor (FGF)-2 was the most effective in promoting growth of these cells in vitro. The size of colonies formed in clonal conditions was approximately 2.5 times larger in presence of FGF-2. Also the morphology of BMSC was affected: cells cultured in 10% FCS alone became flattened, whereas FGF-2 expanded cells maintained a fibroblast- like elongated phenotype. Levels of alkaline phosphatase activity in BMSC expanded with FGF-2 were significantly lower (56%) than control and, after stimulation with ascorbic acid, βGlycerophosphate and dexamethasone, FGF-2 expanded BMSC deposited approximately 3-fold more mineralized matrix than control cells. We have assessed osteogenicity of BMSC on hydroxyapatite porous scaffolds (bioceramics) by an ectopic bone formation assay. FGF-2 expanded BMSC yielded a higher bone formation (>20-fold) than control cells. We conclude that FGF-2, promoting BMSC proliferation, maintains cells in a more immature state allowing in vitro expansion of human osteoprogenitors which, associated with bioceramics, can differentiate in vivo and form bone tissue.
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U2 - 10.1210/en.138.10.4456
DO - 10.1210/en.138.10.4456
M3 - Article
C2 - 9322963
AN - SCOPUS:0030885841
VL - 138
SP - 4456
EP - 4462
JO - Endocrinology
JF - Endocrinology
SN - 0013-7227
IS - 10
ER -