Mitotic trafficking of silicon microparticles

Area of Science:

• Biomaterials Science
• Cell Biology
• Nanotechnology

Background:

• Multistage carriers are designed for targeted delivery of therapeutics and theranostics.
• Mesoporous silicon microparticles are being explored as primary carriers for these advanced systems.
• Understanding their interaction with biological systems, particularly endothelial cells, is crucial for clinical translation.

Purpose of the Study:

• To evaluate the biocompatibility of mesoporous silicon microparticles with endothelial cells in vitro.
• To assess the impact of these microparticles on endothelial cell integrity and mitotic processes.
• To investigate the influence of integrated gold or iron oxide nanoparticles on cellular response.

Main Methods:

• In vitro assays using endothelial cells and mesoporous silicon microparticles.
• Assessment of cellular morphology, viability, and mitotic trafficking post-internalization.
• Measurement of cytokine release (IL-6, IL-8) to gauge inflammatory response.
• Tracking of endosome partitioning during mitosis in the presence of microparticles.

Main Results:

• Endothelial cells maintained integrity, viability, and normal mitotic progression after internalizing silicon microparticles.
• Incorporation of gold or iron oxide nanoparticles did not affect cellular uptake or viability.
• Endothelial cells exhibited basal levels of IL-6 and IL-8 release, indicating minimal inflammatory response.
• Demonstrated polarized, ordered partitioning of endosomes during mitosis, unaffected by microparticle presence.

Conclusions:

• Mesoporous silicon microparticles are biocompatible with endothelial cells and do not impede critical cellular functions like mitosis.
• The integration of imaging nanoparticles does not compromise cellular health or function.
• These findings support the potential of silicon microparticles for advanced biomedical applications, including targeted drug delivery and theranostics.