In this study, we compared the structural and physicochemical properties of different concentrations of alginate and high molecular weight hyaluronic acid (HA) hydrogels and their biocompatibility and bioactivity after long-term culture with MC3T3-E1 cells. Both hydrogels were biocompatible and supported long-term viability and cell proliferation. Alginate induced higher alkaline phosphatase (ALP) activity levels than HA. Calcium content was increased in concentration dependent manner in cells cultured with alginate compared to control. Culture with HA hydrogels reduced alkaline phosphatase (Alp), bone sialoprotein (Bsp) and osteocalcin (Oc), while alginate increased Oc mRNA levels. Unmodified alginate hydrogels supported osteoblast differentiation better than HA hydrogels, suggesting that alginates are more suitable for biomaterial applications in bone tissue engineering.
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Rubert et al. (2012) studied this question.
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