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Abstract

BACKGROUND:

RADA16 is a mature amphiphilic self-assembling peptide, which can be assembled into nanofibers, and promote MC3T3 E1 cell attachment, spreading and proliferation.

OBJECTIVE:

To observe the effects of the new-type self-assembling peptide hydrogel NBD/RADA16 on osteogenic differentiation of mouse preosteoblasts MC3T3 E1.

METHODS:

The MC3T3 E1 cells were inoculated in NBD/RADA16 self-assembling peptide hydrogel and RADA16 hydrogel for osteogenic induction. Cells undergoing simple osteogenic induction served as controls. After culture for 1, 3, 6 days, the activity of alkaline phosphatase was detected. After 7 days, western blot assay was used to determine the expression of bone morphogenetic protein-2. After 21 days, alizarin red staining was used to observe calcified nodules.

RESULTS AND CONCLUSION:

MC3T3 E1 cells grew well on the NBD/RADA16 peptide hydrogel, which were superior to those on the RADA16 hydrogel. The activity of alkaline phoshpatase was higher in the NBD/RADA16 group than the RADA16 and control groups (P < 0.01). Compared with the RADA16 hydrogel, mineralized matrix deposition and expression of bone morphogenetic protein-2 were higher on the NBD/RADA16 peptide hydrogel (P < 0.01). These findings indicate that the NBD/RADA16 peptide hydrogel is superior to the RADA16 hydrogel for promoting the osteogenic differentiation of MC3T3 E1 cells.

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