The behavior of MC3T3 osteoblasts and human bone marrow stem cells on non-coated and hydroxyapatite
(HAP)-coated carboxymethyl chitosan (CMCS) scaffolds was investigated in this study. Four HAPcoated
scaffolds with different coating morphology and coverage were prepared by mineralization for
1 week in four different mineralizing solutions. Viability, attachment, proliferation, and differentiation
of the osteoblasts on these scaffolds were evaluated, and an osteogenic gene expression analysis was carried
out to investigate the osteoblastic differentiation of the stem cells. No cytotoxic effects were
observed with both the non-coated and coated scaffolds. The non-coated CMCS scaffold supports attachment,
proliferation, and differentiation of the osteoblasts and directs stem cell differentiation to osteoblast.
Coating the scaffold with HAP substantially enhances these effects on the osteoblasts and stem
cells. The main improvement was in the late stage of osteoblast differentiation since osteoblastic differentiation
of the osteoblasts and stem cells in this stage was significantly enhanced by the coatings regardless
of the variation in morphology and coverage. On the other hand, high HAP coverage was beneficial in
stimulating osteoblast attachment and proliferation. This study demonstrates the good potential of HAPcoated
CMCS scaffolds as osteogenic scaffolds to stimulate bone healing.
The behavior of MC3T3 osteoblasts and human bone marrow stem cells on non-coated and hydroxyapatite(HAP)-coated carboxymethyl chitosan (CMCS) scaffolds was investigated in this study. Four HAPcoatedscaffolds with different coating morphology and coverage were prepared by mineralization for1 week in four different mineralizing solutions. Viability, attachment, proliferation, and differentiationof the osteoblasts on these scaffolds were evaluated, and an osteogenic gene expression analysis was carriedout to investigate the osteoblastic differentiation of the stem cells. No cytotoxic effects wereobserved with both the non-coated and coated scaffolds. The non-coated CMCS scaffold supports attachment,proliferation, and differentiation of the osteoblasts and directs stem cell differentiation to osteoblast.Coating the scaffold with HAP substantially enhances these effects on the osteoblasts and stemcells. The main improvement was in the late stage of osteoblast differentiation since osteoblastic differentiationof the osteoblasts and stem cells in this stage was significantly enhanced by the coatings regardlessof the variation in morphology and coverage. On the other hand, high HAP coverage was beneficial instimulating osteoblast attachment and proliferation. This study demonstrates the good potential of HAPcoatedCMCS scaffolds as osteogenic scaffolds to stimulate bone healing.
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