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Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...

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Nanogold Labeling of the Yeast Endosomal System for Ultrastructural Analyses
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Tailoring silver nanodots for intracellular staining.

Sungmoon Choi1, Junhua Yu, Sandeep A Patel

  • 1School of Chemistry and Biochemistry and Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA 30332-0400, USA.

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
|November 11, 2010
PubMed
Summary
This summary is machine-generated.

Stable silver nanocluster emitters were synthesized using oligonucleotide scaffolds for enhanced intracellular imaging. This breakthrough allows for highly concentrated and spectrally pure probes, enabling both fixed and live-cell staining applications.

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Area of Science:

  • Bioconjugation
  • Nanotechnology
  • Biomedical Imaging

Background:

  • Silver nanoclusters (AgNCs) are promising fluorescent probes.
  • Existing AgNCs often lack stability in biological conditions.
  • Developing stable and bright intracellular probes is crucial for bioimaging.

Purpose of the Study:

  • To synthesize stable silver nanocluster emitters using oligonucleotide scaffolds.
  • To optimize nanocluster properties for intracellular applications.
  • To demonstrate the utility of these nanoclusters for cell staining.

Main Methods:

  • Synthesis of Ag nanoclusters stabilized by tailored oligonucleotide scaffolds.
  • Optimization of single-stranded DNA (ssDNA) stability.
  • Characterization of nanocluster stability, concentration, and spectral purity.
  • Demonstration of intracellular delivery via peptide conjugation and microinjection.

Main Results:

  • Achieved thermally and cell-culture medium stable Ag nanocluster emitters.
  • Created highly concentrated and spectrally pure nanocluster probes.
  • Demonstrated strong intracellular emission in both fixed and live cells.
  • Successfully delivered nanoclusters into cells using two distinct methods.

Conclusions:

  • Tailored oligonucleotide scaffolds yield stable and bright Ag nanocluster emitters.
  • Optimized nanoclusters are suitable for intracellular imaging and cell staining.
  • These nanoclusters offer a versatile platform for advanced cellular analysis.