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Immunogold Electron Microscopy

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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Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis

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Molecular recognition by gold, silver and copper nanoparticles.

Yannick Tauran¹, Arnaud Brioude, Anthony W Coleman

¹Yannick Tauran, Arnaud Brioude, Anthony W Coleman, CNRS, LMI, University of Lyon 1, F69622 Villeurbanne, France.

World Journal of Biological Chemistry

|August 27, 2013

Summary

Noble metal nanoparticles are excellent for detecting molecular recognition events due to their sensitivity. This review covers nanoparticle preparation, functionalization, properties, and applications in molecular recognition using nucleic acids, proteins, and supramolecular chemistry.

Keywords:

Copper DNA Gold Hybrid nanoparticles Metal Molecular recognition Protein Silver Supramolecular assembly Toxicity

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Area of Science:

Nanotechnology
Materials Science
Biochemistry

Background:

Noble metal nanoparticles exhibit physical properties sensitive to their local molecular environment.
This sensitivity makes them ideal platforms for detecting molecular recognition events.

Purpose of the Study:

To provide a comprehensive review of the state-of-the-art in molecular recognition using noble metal nanoparticles.
To discuss nanoparticle preparation, functionalization, properties, and applications in detail.

Main Methods:

Review of nanoparticle synthesis, capping, and stabilization techniques.
Discussion of functionalization methods including electrostatic adsorption, chemisorption, and affinity-based coordination.
Analysis of optical and electrical properties relevant to molecular recognition.

Main Results:

Detailed examination of various capping agents for molecular recognition: nucleic acids (oligonucleotides, aptamers), proteins (antibodies), and supramolecular chemistry molecules (cyclodextrins, calixarenes, dendrimers, crown ethers, cucurbitales).
Highlighting applications of these systems in molecular recognition.
Briefly addressing potential nanoparticle toxicity concerns.

Conclusions:

Noble metal nanoparticles, functionalized with diverse recognition elements, offer powerful tools for molecular detection.
The review consolidates current knowledge on their preparation, properties, and applications, while acknowledging safety considerations.