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Decoding Live Cell Interactions with Multi-Nanoparticle Systems: Differential Implications for Uptake, Trafficking,

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Oligonucleotide-modified gold nanoparticles (OGNs) maintain their gene regulation function and uptake levels even when cells are exposed to iron oxide nanoparticles (IOPs). This indicates OGNs can be part of cooperative nanomaterial systems for theranostics.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Molecular Biology

Background:

  • Oligonucleotide-modified gold nanoparticles (OGNs) are used in gene regulation therapies.
  • Cooperative nanomaterial systems offer potential for reduced dosage and safer clinical translation.
  • Understanding cellular interactions of OGNs with other nanoparticles is limited.

Purpose of the Study:

  • To investigate the impact of simultaneous iron oxide nanoparticle (IOP) uptake on OGN endocytosis and gene regulation function.
  • To explore cellular trafficking pathways when cells interact with multiple nanoparticle types.

Main Methods:

  • Investigated cellular uptake and gene regulation of OGNs in the presence of varying IOP concentrations.
  • Utilized co-localization analysis to study intracellular trafficking of OGNs and IOPs.

Main Results:

  • OGN uptake and gene regulation function remained stable across a wide range of IOP concentrations.
  • Co-localization analysis revealed shared intracellular trafficking pathways for OGNs and IOPs.
  • OGN endocytosis was largely independent of IOP endocytosis, despite shared pathways.

Conclusions:

  • Simultaneous IOP exposure does not compromise OGNs' gene regulation efficacy or uptake.
  • OGNs and IOPs share intracellular transport pathways but maintain distinct endocytic processes.
  • Findings support the design of cooperative nanomaterials for theranostic applications.