Small organic molecules containing amorphous calcium phosphate: synthesis, characterization and transformation

Area of Science:

• Biomaterials Science
• Biomineralization
• Cellular Biology

Background:

• Amorphous calcium phosphate (ACP) is a key precursor in biomineralization.
• Organic compounds are crucial in biomineralization, influencing bone remodeling and healing.

Purpose of the Study:

• To synthesize ACP using naturally occurring organic compounds (ascorbate, glutamate, itaconate).
• To characterize ACP variants and assess their impact on cell viability and transformation.

Main Methods:

• Synthesis of ACP with ascorbate, glutamate, and itaconate.
• Characterization using XRD, FTIR, solid-state ¹³C and ³¹P NMR.
• In vitro analysis with MC3T3-E1 cells and assessment of ACP transformation in various media.

Main Results:

• Synthesized ACP variants exhibited spherical morphology (~20 nm).
• Organic compounds significantly influenced ACP density, surface area, particle size, and transformation.
• ACP with ascorbate (ACP_ASC) and itaconate (ACP_ITA) showed high cell viability; ACP with glutamate (ACP_GLU) showed dose-dependent cytocompatibility.

Conclusions:

• Naturally occurring organic compounds can be used to develop biomimetic ACP.
• ACP variants exhibit distinct properties and cytocompatibility based on the organic modifier.
• These findings advance the development of ACP-based materials for bone regeneration.