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Labeling DNA Probes

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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.
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Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis

Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis

Published on: March 7, 2018

Ingenious nanoprobes in bioassays.

Cangel Pui-Yee Chan¹

¹Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, SAR Hong Kong. cangel@ust.hk

|November 19, 2010

Summary

Innovative nanoprobes enhance bioassays through signal amplification. These advancements, including gold nanoparticles and quantum dots, offer PCR-like sensitivity for point-of-care diagnostics.

Area of Science:

Biotechnology
Nanotechnology
Analytical Chemistry

Background:

Development of sensitive and efficient bioassays is crucial for diagnostics.
Traditional bioassays face limitations in sensitivity and multiplexing capabilities.
Nanotechnology offers novel solutions for signal amplification and probe design.

Purpose of the Study:

To review innovative nanoprobes for signal amplification in bioassays.
To highlight advancements in nucleic acid assays and biobarcode technologies.
To discuss the potential of quantum dots and novel nanoprobe designs in improving bioassay performance.

Main Methods:

Functionalization of gold nanoparticles with oligonucleotides for nucleic acid assays.
Utilizing antibody-coated magnetic beads and gold nanoparticle probes in biobarcode assays for analyte concentration and signal amplification.

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Development of nanoprobes with releasable fluorophores or aggregation-induced emission (AIE) features.

Synthesis and biofunctionalization of quantum dots for various bioassay applications.

Main Results:

Gold nanoparticle functionalization accelerates the development of nucleic acid assays.
Biobarcode assays demonstrate significant signal amplification through analyte concentration.
Novel nanoprobes with releasable fluorophores or AIE features enhance bioassay sensitivity.
Quantum dots show widespread applications in DNA sorting, multiplexing, and FRET-based sensing.

Conclusions:

Ingenious nanoprobes significantly improve bioassay performance, offering PCR-like sensitivity and high selectivity.
Nanoprobe advancements enable massive multiplexing, time efficiency, and point-of-care testing.
The integration of nanotechnology in bioassays revolutionizes diagnostic capabilities.