Exploring Selenium-Functionalized Hydroxyapatite Using Organic Selenocystine for Antitumor Applications.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cancer Therapeutics

Background:

• Selenium (Se) is an essential micronutrient with anticancer potential, particularly organic forms like selenocystine (SeCys).
• SeCys demonstrates selective toxicity to cancer cells and enhances chemotherapy, but faces stability and solubility issues.
• Functionalized nanomaterials offer a promising strategy to overcome SeCys limitations for clinical applications.

Purpose of the Study:

• To investigate the incorporation of SeCys with hydroxyapatite nanoparticles (HASeCys) using various synthesis methods.
• To form nanocomposites with elemental selenium and evaluate their anticancer activity.
• To optimize SeCys delivery using nanomaterial functionalization.

Main Methods:

• Hydroxyapatite nanoparticles (HA) were functionalized with SeCys via adsorption, co-precipitation, and thermal decomplexing co-precipitation.
• Nanocomposite formation and elemental selenium yield were analyzed, with synthesis parameters influencing Se allotrope formation.
• Preliminary in vitro testing of HASeCys on various cancer cell lines.

Main Results:

• The thermal decomplexing co-precipitation method yielded the highest elemental selenium content.
• Hydroxyapatite nanocrystals functionalized with both crystalline gray and amorphous red selenium exhibited notable anticancer activity.
• Successful formation of HASeCys nanocomposites with potential therapeutic benefits.

Conclusions:

• Functionalized hydroxyapatite nanoparticles provide a viable platform for SeCys delivery.
• HASeCys nanocomposites demonstrate preliminary anticancer efficacy, warranting further investigation.
• Synthesis optimization is crucial for controlling Se allotrope formation and maximizing therapeutic potential.