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A Cell-Culture Technique to Encode Glyco-Nanoparticles Selectivity.

Balamurugan Subramani1, Preeti Madhukar Chaudhary1, Raghavendra Kikkeri1

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Chemistry, an Asian Journal
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Summary

Bioactive nanoparticles offer targeted delivery, but traditional assays have limitations. An inverted cell-culture assay combined with glyco-gold nanoparticles provides a more specific and efficient method for studying nanoparticle uptake and cytotoxicity.

Keywords:
CarbohydratesCell cultureCytotoxicityGlycobiologyNanoparticles

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Cell Biology

Background:

  • Nanoparticles (NPs) functionalized with bioactive ligands show promise for targeted biological applications.
  • Traditional in vitro assays can yield non-specific results due to nanoparticle sedimentation and self-assembly.
  • Inverted cell-culture assays offer improved accuracy for detecting receptor-mediated NP uptake and cytotoxicity.

Purpose of the Study:

  • To investigate cellular internalization and cytotoxicity of glyco-gold nanoparticles using an inverted cell-culture assay.
  • To explore how regioselective glycosylation patterns and NP shapes influence receptor binding affinity and cellular uptake.
  • To compare NP uptake and cytotoxicity mechanisms in HepG2 and HeLa cells using upright and inverted assays.

Main Methods:

  • Development and utilization of galactosamine-embedded fluorescent gold nanoparticles (AuNPs).
  • Application of an inverted cell-culture assay technique for enhanced NP detection.
  • Comparative analysis of NP uptake and cytotoxicity in HepG2 and HeLa cell lines under different assay conditions.

Main Results:

  • Glycosylation patterns and NP shapes significantly tune receptor binding affinity, enabling precise cellular uptake of AuNPs.
  • The inverted assay demonstrated high specificity for NP uptake compared to traditional upright assays.
  • Significant differences in cytotoxicity and uptake mechanisms were observed between HepG2 and HeLa cells.

Conclusions:

  • Inverted cell-culture assays combined with functionalized nanoparticles provide a highly specific and rapid screening method.
  • This approach allows for accurate investigation of nanoparticle-cell interactions, overcoming limitations of traditional assays.
  • The findings highlight the potential for precise control over nanoparticle cellular uptake and cytotoxicity through ligand engineering.