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Related Concept Videos

Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.

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Microglia as a Surrogate Biosensor to Determine Nanoparticle Neurotoxicity
08:37

Microglia as a Surrogate Biosensor to Determine Nanoparticle Neurotoxicity

Published on: October 25, 2016

Microglial response to gold nanoparticles.

Eliza Hutter1, Sebastien Boridy, Simon Labrecque

  • 1Department of Pharmacology & Therapeutics, McGill University, McIntyre Medical Sciences Building, Montreal, QC H3G 1Y6, Canada.

ACS Nano
|March 25, 2010
PubMed
Summary
This summary is machine-generated.

Gold nanoparticles (GNPs) interact with brain cells, including microglia and neurons. GNP shape and surface coating influence microglial activation, suggesting nanogeometry can regulate these interactions.

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Area of Science:

  • Nanomedicine
  • Neuroscience
  • Immunology

Background:

  • Nanotherapeutics and nanodiagnostics are increasingly vital in medicine.
  • Understanding nanomaterial interactions with biological systems is critical.
  • Microglia are key brain immune cells involved in surveillance and immune response.

Purpose of the Study:

  • To investigate the interactions of gold nanoparticles (GNPs) with microglia and neurons.
  • To characterize the cellular response to GNPs of varying morphologies and surface coatings.
  • To explore the influence of GNP nanogeometry on microglial activation.

Main Methods:

  • Utilized dark-field microscopy and two-photon-induced luminescence (TPL) for analysis.
  • Administered GNPs intranasally in transgenic mice for in vivo studies.
  • Performed in vitro studies on primary hippocampal neurons and microglia.

Main Results:

  • Gold nanoparticles (GNPs) were internalized by both microglia and neurons.
  • Transient toll-like receptor 2 (TLR-2) up-regulation observed in vivo after intranasal GNP administration.
  • Differential in vitro up-regulation of TLR-2, IL-1alpha, GM-CSF, and NO in microglia exposed to GNPs.
  • GNP morphology and surface chemistry (PEG vs. CTAB) significantly affected microglial activation.

Conclusions:

  • GNP internalization occurs in both microglia and neurons.
  • GNP nanogeometry and surface chemistry are critical determinants of microglial activation.
  • Tuning GNP characteristics offers a potential strategy for regulating neuro-immune interactions.