Transcriptomic Profiling of Mouse Mesenchymal Stem Cells Exposed to Metal-Based Nanoparticles

Area of Science:

• Biomedical Engineering
• Stem Cell Biology
• Nanotoxicology

Background:

• Mesenchymal stem cells (MSCs) are crucial for tissue regeneration due to their immunomodulatory and secretory functions.
• Metal nanoparticles (NPs) possess antimicrobial properties that may enhance tissue healing.
• Understanding NP interactions with MSCs is vital for developing effective regenerative therapies.

Purpose of the Study:

• To investigate the in vitro effects of silver (Ag), copper oxide (CuO), and zinc oxide (ZnO) NPs on mouse MSCs at the transcriptional level.
• To explore potential toxicity and modulation of MSC activity by these NPs.
• To examine mRNA-miRNA interactions for insights into epigenetic regulation.

Main Methods:

• In vitro exposure of mouse MSCs to Ag, CuO, and ZnO NPs.
• Transcriptional analysis to assess gene expression changes.
• Investigation of mRNA-miRNA interactions to understand epigenetic regulation.

Main Results:

• All tested NPs induced immunomodulatory effects, extracellular vesicle generation, inhibited osteogenesis, and enhanced adipogenesis in MSCs.
• Ag NPs showed the most significant impact, affecting numerous genes, including those related to interferon-γ stimulation and cytochrome P450 activity, indicating potential oxidative stress.
• MiR-126 was upregulated by all NPs, and MiR-92a was downregulated by ZnO NPs, suggesting a role in enhancing MSC healing potential.

Conclusions:

• Metal nanoparticles positively modulate mesenchymal stem cells, offering potential for tissue regeneration.
• Ag NPs may induce oxidative stress, potentially limiting their therapeutic application in combination with MSCs.
• Further research into NP-MSC interactions is warranted to optimize regenerative strategies.