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Related Concept Videos

Labeling DNA Probes03:31

Labeling DNA Probes

DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
In-situ Hybridization02:31

In-situ Hybridization

In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Nanometer-sized diamond particle as a probe for biolabeling.

Jui-I Chao1, Elena Perevedentseva, Pei-Hua Chung

  • 1Institute of Pharmacology and Toxicology, Tzu-Chi University, Hualien, 970 Taiwan.

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|May 22, 2007
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Nanodiamonds offer a novel, non-toxic biolabeling method with inherent fluorescence and Raman signals. These nanodiamond probes effectively visualize cellular interactions and maintain protein function for medical applications.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cell Biology

Background:

  • Traditional biolabeling methods often require complex pretreatments and can exhibit cytotoxicity.
  • Nanodiamonds possess unique properties like biocompatibility, inherent fluorescence, and detectable Raman signals.
  • These properties make nanodiamonds attractive for advanced biological detection systems.

Purpose of the Study:

  • To develop and demonstrate a novel biolabeling method using nanodiamonds as detection probes.
  • To evaluate the biocompatibility, non-cytotoxicity, and visualization capabilities of nanodiamonds in biological systems.
  • To showcase the potential of nanodiamonds in protein-targeted cell and bacteria interaction studies.

Main Methods:

  • Utilized carboxylated nanodiamonds (cNDs) as detection probes.
  • Demonstrated cND penetration and non-cytotoxicity on A549 human lung epithelial cells.
  • Visualized protein-targeted interactions using a cND-lysozyme complex with Escherichia coli.

Main Results:

  • Carboxylated nanodiamonds exhibited excellent penetration ability and non-cytotoxicity in A549 cells.
  • The cND-lysozyme complex successfully visualized interactions with Escherichia coli.
  • The functional integrity of the biomolecule-cND complex was preserved, maintaining the protein's original functions.
  • Intrinsic fluorescence and Raman signals from nanodiamonds were easily detected without complex pretreatments.

Conclusions:

  • Nanodiamonds are promising, biocompatible, and non-toxic probes for biolabeling applications.
  • The intrinsic optical properties and low cytotoxicity of nanodiamonds facilitate advanced biological visualization.
  • Developed nanodiamond-based systems hold significant potential for diverse medical applications, including diagnostics and targeted therapies.