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Related Experiment Video

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Monodisperse selenium-substituted hydroxyapatite: Controllable synthesis and biocompatibility.

Jianpeng Sun1, Xiaoyan Zheng2, Hui Li2

  • 1School of Civil Engineering, Xi'an University of Architecture and Technology, Shaanxi 710055, PR China; Shaanxi Key Laboratory of Degradable Biomedical Materials, Shaanxi R&D Center of Biomaterials and Fermentation Engineering, School of Chemical and Engineering, Northwest University, Xi'an, 710069, PR China.

Materials Science & Engineering. C, Materials for Biological Applications
|February 11, 2017
PubMed
Summary

This study focused on creating hydroxyapatite, a key mineral in bones, with controlled selenium substitution. The team successfully synthesized selenium-doped hydroxyapatite (SeHA) using a liquid-solid-solution method. They found that varying the selenium content changed the shape of the nanoparticles from nanorods to nanoneedles. The material was tested for biocompatibility and showed low toxicity to bone cells. The results suggest that SeHA could be used in artificial bone scaffolds to potentially inhibit tumor growth. The study contributes to the development of functional biomaterials with tunable properties.

Keywords:
BiocompatibilityControllable synthesisHydroxyapatiteSeleniumselenium-doped hydroxyapatitebiocompatible nanoparticle synthesisbone scaffold materialnanoparticle morphology control

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Area of Science:

  • Biomaterials development in tissue engineering
  • Nanoparticle synthesis in materials science
  • Selenium-based biocompatible compounds in biomedical research

Background:

Natural bone contains hydroxyapatite as a key mineral component. Researchers have explored ion-doped hydroxyapatites for biomedical applications. Selenium is known for its antioxidant and anticancer properties. Prior studies show that doped hydroxyapatites can influence cell behavior. However, the role of selenium substitution in HA remains underexplored. This gap motivated the investigation of selenium-doped HA. The study aimed to control selenium doping levels precisely. The findings may expand the use of HA in bone-related therapies.

Purpose Of The Study:

The goal was to synthesize selenium-substituted hydroxyapatite with controlled properties. Researchers focused on varying selenium content systematically. They aimed to assess how selenium affects HA structure and biocompatibility. The study sought to produce monodisperse nanoparticles with tunable shapes. The team wanted to evaluate the effect of selenium on cell toxicity. They also aimed to determine if the material could inhibit tumor growth. The approach combined synthesis and biological testing. The findings could guide future biomaterial design.

Main Methods:

The team used a liquid-solid-solution strategy to synthesize SeHA. They varied the Se/(P+Se) molar ratio from 0 to 0.4. Transmission electron microscopy analyzed nanoparticle morphology. X-ray diffraction confirmed crystal structure changes. Fourier-transform infrared spectroscopy identified chemical bonds. Energy-dispersive spectrometer measured elemental composition. The study tested nanoparticle shapes under different selenium levels. The team evaluated biocompatibility using osteoblastic cells.

Main Results:

Selenium doping levels were successfully controlled up to 0.4 molar ratio. Nanoparticle shapes shifted from nanorods to nanoneedles with higher selenium. XRD confirmed structural changes due to selenium substitution. FTIR showed characteristic peaks of SeO32- in the lattice. EDS confirmed selenium incorporation into HA structure. The material showed low cytotoxicity to osteoblastic cells. Morphological changes correlated with selenium concentration. The results suggest potential use in bone tumor inhibition.

Conclusions:

The study demonstrated controlled selenium doping in hydroxyapatite. The material showed tunable nanoparticle morphology with selenium levels. The SeHA nanocrystals exhibited low cytotoxicity to bone cells. The findings suggest potential applications in bone tumor inhibition. The synthesis method allows precise control over selenium content. The material's biocompatibility supports its use in artificial scaffolds. The results align with the authors' aim to develop functional biomaterials. The study contributes to the field of selenium-doped biomaterials.

The study successfully produced SeHA nanocrystals with controlled selenium levels and low cytotoxicity.

Selenium was introduced via the liquid-solid-solution strategy with Se/(P+Se) molar ratio up to 0.4.

It controls nanoparticle morphology, shifting from nanorods to nanoneedles with increasing selenium.

The team used TEM, XRD, FTIR, and EDS to analyze structure and composition.

The material was tested for cytotoxicity on osteoblastic cells, showing low toxicity.

The authors suggest SeHA may inhibit tumor growth in bone due to its biocompatibility.