Nanoparticles for Creating a Strategy to Stimulate Liver Regeneration.

Area of Science:

• Biomedical Engineering
• Hepatology
• Nanotechnology

Background:

• Effective liver regeneration is crucial after resection.
• Targeted delivery of bioactive molecules via nanoparticles offers a promising approach.
• Novel strategies are needed to enhance liver recovery.

Purpose of the Study:

• To investigate nanoparticle interactions with hepatic cells.
• To evaluate nanoparticle biodistribution, cytotoxicity, and metabolic effects.
• To identify optimal nanoparticles for liver regeneration applications.

Main Methods:

• Synthesis and characterization of polylactide, gold, and silicon nanoparticles.
• Labeling nanoparticles with fluorescent dye (Cy5) for visualization.
• Utilizing multiphoton microscopy with fluorescence lifetime imaging on liver slices and primary hepatocyte cultures.

Main Results:

• Silicon nanoparticles were primarily taken up by macrophages, inducing reactive oxygen species and impairing hepatocyte metabolism.
• Gold nanoparticles accumulated in all liver cell types, causing significant toxicity, apoptosis, and metabolic disruption.
• Polylactide nanoparticles demonstrated effective accumulation in hepatocytes with no adverse effects on cellular metabolism.

Conclusions:

• Polylactide nanoparticles are the most promising for developing drug delivery systems to stimulate liver regeneration.
• Silicon and gold nanoparticles exhibit significant cytotoxicity, limiting their therapeutic potential.
• Targeted delivery of therapeutic agents using biocompatible nanoparticles is a viable strategy for enhancing liver repair.