In Vitro Evaluation of Cellular Interactions with Nanostructured Spheres of Alginate and Zinc-Substituted Carbonated Hydroxyapatite

TL;DR

This study evaluates how nanostructured spheres made of alginate and zinc-substituted hydroxyapatite interact with bone cells in the lab, showing better cell compatibility and bone growth potential.

Contribution

The paper introduces zinc-substituted hydroxyapatite composites with improved bioactivity and biocompatibility for bone tissue engineering.

Findings

ZnCHA showed reduced crystallinity and increased surface area compared to CHA.

ZnCHA enhanced osteoblast viability, proliferation, and mineralization compared to CHA.

ZnCHA is a promising candidate for bone tissue engineering applications.

Abstract

The increasing demand for effective bone regeneration materials drives the exploration of biomaterials with enhanced bioactivity and biocompatibility, such as zinc-substituted compounds. This study investigates the in vitro cellular interactions with nanostructured spheres composed of alginate/carbonated hydroxyapatite (CHA), compared to zinc-substituted CHA (ZnCHA). This work aimed to compare the physicochemical properties and biological effects of ZnCHA and CHA on osteoblasts. ZnCHA was synthesized using a wet chemical method, followed by characterization through X-ray diffraction, Fourier transform infrared spectroscopy, total organic carbon analysis, Wavelength-dispersive X-ray spectroscopy, and BET surface area analysis to assess ion release and structural changes. Biological evaluation was conducted using cell viability, proliferation, and biomineralization assays on osteoblasts. Results showed successful incorporation of zinc and carbonate, leading to reduced crystallinity and increased surface area. Cell viability and proliferation assays indicated ZnCHA’s cytocompatibility and enhanced osteoblastic activity, with increased mineralization nodules compared to CHA samples. The study concludes that ZnCHA composites are promising candidates for bone tissue engineering, demonstrating improved cytocompatibility and potential for further preclinical evaluations.

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