TY - JOUR
T1 - The effect of ex vivo dynamic loading on the osteogenic differentiation of genetically engineered mesenchymal stem cell model
AU - Kimelman-Bleich, Nadav
AU - Seliktar, Dror
AU - Kallai, Ilan
AU - Helm, Gregory A.
AU - Gazit, Zulma
AU - Gazit, Dan
AU - Pelled, Gadi
PY - 2011/5
Y1 - 2011/5
N2 - Mechanical loading has been described as a highly important stimulus for improvements in the quality and strength of bone. It has also been shown that mechanical stimuli can induce the differentiation of mesenchymal stem cells (MSCs) along the osteogenic lineage. We have previously demonstrated the potent osteogenic effect of MSCs engineered to overexpress the BMP2 gene. In this study we investigated the effect of mechanical loading on BMP2-expressing MSC-like cells, using a special bioreactor designed to apply dynamic forces on cell-seeded hydrogels. Cell viability, alkaline phosphatase (ALP) activity, BMP2 secretion and mineralized substance formation in the hydrogels were quantified. We found that cell metabolism increased as high as 6.8-fold, ALP activity by 12.5-fold, BMP2 secretion by 182-fold and mineralized tissue formation by 1.72-fold in hydrogels containing MSC-like cells expressing BMP2, which were cultured in the presence of mechanical loading. We have shown that ex vivo mechanical loading had an additive effect on BMP2-induced osteogenesis in genetically engineered MSC-like cells. These data could be valuable for bone tissue-engineering strategies of the future.
AB - Mechanical loading has been described as a highly important stimulus for improvements in the quality and strength of bone. It has also been shown that mechanical stimuli can induce the differentiation of mesenchymal stem cells (MSCs) along the osteogenic lineage. We have previously demonstrated the potent osteogenic effect of MSCs engineered to overexpress the BMP2 gene. In this study we investigated the effect of mechanical loading on BMP2-expressing MSC-like cells, using a special bioreactor designed to apply dynamic forces on cell-seeded hydrogels. Cell viability, alkaline phosphatase (ALP) activity, BMP2 secretion and mineralized substance formation in the hydrogels were quantified. We found that cell metabolism increased as high as 6.8-fold, ALP activity by 12.5-fold, BMP2 secretion by 182-fold and mineralized tissue formation by 1.72-fold in hydrogels containing MSC-like cells expressing BMP2, which were cultured in the presence of mechanical loading. We have shown that ex vivo mechanical loading had an additive effect on BMP2-induced osteogenesis in genetically engineered MSC-like cells. These data could be valuable for bone tissue-engineering strategies of the future.
KW - Bioreactors
KW - Bone
KW - Mechanical effects on cells and tissues
KW - Mesenchymal stem cells
UR - http://www.scopus.com/inward/record.url?scp=79954582781&partnerID=8YFLogxK
U2 - 10.1002/term.324
DO - 10.1002/term.324
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C2 - 20740691
AN - SCOPUS:79954582781
SN - 1932-6254
VL - 5
SP - 384
EP - 393
JO - Journal of Tissue Engineering and Regenerative Medicine
JF - Journal of Tissue Engineering and Regenerative Medicine
IS - 5
ER -