Boron and Zinc Co-doped Hydroxyapatites for Bone Tissue Engineering Applications

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Biotechnology

Background:

• Hydroxyapatite (HA) is a key material in bone tissue engineering.
• Optimizing HA's biological and structural properties is crucial for enhanced bone regeneration.
• Investigating dopant effects, such as Boron (B) and Zinc (Zn), can lead to improved biomaterials.

Purpose of the Study:

• To investigate the effects of Boron (B) and Zinc (Zn) co-doping on the structural and biological properties of hydroxyapatite (HA).
• To evaluate the impact of B and Zn co-doped HA on the viability, proliferation, osteogenic differentiation of human adipose-derived stem cells (hADSCs), and angiogenesis in human umbilical vein endothelial cells (HUVECs).

Main Methods:

• Synthesis and characterization of B and Zn co-doped HA using techniques including SEM, ICP-OES, XRD, FTIR, and dynamic light scattering.
• Assessment of bioactivity and cellular responses (viability, proliferation, ALP activity) of doped HA materials.
• In vitro evaluation of angiogenic potential using HUVECs.

Main Results:

• B and Zn co-doping altered HA particle size and decreased phase percentage, crystallinity, and crystallite size.
• Co-doped HA generally enhanced cell viability and proliferation of hADSCs, with specific combinations showing significant effects.
• A notable finding was the significant increase in 14-day ALP activity in hADSCs and vessel area in HUVECs with 8 mol% B and 4 mol% Zn co-doped HA.

Conclusions:

• Co-doping HA with 8 mol% B and 4 mol% Zn offers a promising strategy for bone tissue engineering.
• This specific co-doped HA composition demonstrates significant proliferative, osteogenic, and angiogenic effects.
• The findings suggest potential for B and Zn co-doped HA in developing advanced bone regenerative therapies.