Current treatments for bone defects and bone tissue regeneration have significant limitations. Now a new method that immobilises a fusion protein in a hybrid collagen-polymer supportive scaffold shows promise for bone tissue engineering.
Guoping Chen, Yoshihiro Ito and researchers at the Tissue Regeneration Materials Unit, International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, RIKEN, the Immuno-Biological Laboratories Co., Ltd, and the National Institute for Child Health and Development, Tokyo, added a collagen-binding domain from fibronectin to BMP4, a protein that promotes bone regeneration.
The new fusion protein, BMP4-CBD, was used in a scaffold of natural collagen sponge and a strong synthetic polymer, poly(lactic-co-glycolic acid) (PLGA). The scaffold provides space and support for the bone cell growth.
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