Zinc oxide nanoparticles promote migrasomes formation

Area of Science:

• Nanotechnology
• Cell Biology
• Environmental Science

Background:

• Zinc oxide nanoparticles (ZnO-NPs) are increasingly prevalent environmental pollutants.
• Their impact on cellular processes, particularly migrasome formation, remains largely unexplored.
• Understanding these interactions is crucial for assessing health and environmental risks.

Purpose of the Study:

• To investigate the effects of ZnO-NPs on migrasome formation.
• To determine the molecular mechanisms underlying ZnO-NP-induced migrasome biogenesis.
• To assess the protective role of ZnO-NPs against mitochondrial dysfunction.

Main Methods:

• Exposure of cells to 28 nm ZnO-NPs.
• Analysis of migrasome formation and cellular component content.
• Measurement of phosphatidylinositol 4,5-bisphosphate [PI(4,5)P2] and GTP-RhoA levels.
• Evaluation of mitochondrial integrity and mitocytosis induction.

Main Results:

• 28 nm ZnO-NPs significantly enhanced migrasome formation.
• Increased levels of PI(4,5)P2 and GTP-RhoA were observed in ZnO-NP-treated cells.
• ZnO-NPs mitigated mitochondrial damage induced by CCCP via mitocytosis.
• Migrasomes induced by ZnO-NPs contained mitochondria, lysosomes, lipid droplets, and ZnO-NPs.

Conclusions:

• ZnO-NPs promote migrasome formation through specific molecular pathways.
• ZnO-NPs offer protection against mitochondrial damage by enhancing mitocytosis.
• These findings have implications for cellular communication, potential therapeutics, and environmental safety assessments.