Synthesis of bone-like nanocomposites using multiphosphorylated peptides
Charles Sfeir1, Ping-An Fang2, Thottala Jayaraman2
1University of Pittsburgh, School of Dental Medicine, McGowan Institute of Regenerative Medicine, Center for Craniofacial Regeneration, 552 Salk Hall, 3501 Terrace St., Pittsburgh, PA 15261, USA.
Acta Biomaterialia
|January 18, 2014
Summary
Researchers developed new biomimetic nanofibrils for tissue regeneration. These phosphorylated peptides mimic natural bone and dentin structures, offering improved mineralized tissue repair materials.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Biomineralization
Background:
- Mineralized tissues like bone and dentin are complex nanocomposites.
- Current tissue graft materials lack the structural integrity of natural tissues.
- A need exists for advanced materials for mineralized tissue repair and regeneration.
Purpose of the Study:
- To synthesize composite nanofibrils with integrated organic/inorganic phases.
- To create biomimetic materials inspired by mineralized collagen fibrils.
- To advance the development of novel materials for tissue regeneration.
Main Methods:
- Designed bioinspired peptides mimicking dentin phosphophoryn (DPP) with Ser-Ser-Asp repeats.
- Phosphorylated peptides using casein kinases, achieving up to 80% serine phosphorylation.
- Induced biomimetic calcium phosphate mineralization of collagen fibrils using these peptides.
Main Results:
- Synthesized phosphorylated peptides based on dentin phosphophoryn (DPP).
- Achieved structural similarity to natural mineralized collagen fibrils in bone and dentin.
- Successfully created biomimetic composite nanofibrils with integrated organic and inorganic phases.
Conclusions:
- Phosphorylated DPP-inspired peptides enable the synthesis of biomimetic composite nanofibrils.
- This represents a significant step towards nanostructured materials for mineralized tissue regeneration.
- The study highlights the potential of phosphopeptides in developing advanced biomaterials.
