Polycarboxylate ethers: The key towards non-toxic TiO2 nanoparticle stabilisation in physiological solutions

Area of Science:

• Materials Science
• Nanotechnology
• Biocompatibility Studies

Background:

• Stable titanium dioxide nanoparticle (TiO2 NP) dispersions are essential for accurate dosing in biological experiments.
• Existing stabilizers are often tested for cell culture, but industrial products may offer superior performance.

Purpose of the Study:

• To evaluate the efficacy of industrial additives as stabilizers for TiO2 NPs in various cell culture media.
• To compare the performance of industrial stabilizers against cell culture-tested agents.
• To assess the impact of stabilization on TiO2 NP agglomeration and cytotoxicity.

Main Methods:

• TiO2 NPs were synthesized and stabilized in DMEM, RPMI, and BEGM using agents like Melflux® 4930 F, Melpers® 4343, Sika® ViscoCrete®-10110178, bovine serum albumin, and fetal bovine serum.
• Sedimentation studies using UV absorbance spectroscopy quantified stabilization.
• Dynamic light scattering measured agglomerate size.
• Cytotoxicity was assessed using FaDu cells and human mesenchymal stem cells.

Main Results:

• Melflux® 4930 F effectively stabilized TiO2 NPs in all tested cell culture media.
• Stabilized TiO2 NPs maintained stability for at least one day with agglomerate sizes below 100nm.
• No significant cytotoxicity was observed for Melflux® 4930 F-stabilized TiO2 NPs.

Conclusions:

• Industrial additives, specifically Melflux® 4930 F, can be successfully employed to stabilize TiO2 NPs in cell culture media.
• This approach ensures NP stability and size control, crucial for reliable in vitro and in vivo studies.
• The use of Melflux® 4930 F offers a promising alternative for preparing stable NP dispersions without compromising biocompatibility.