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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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Time-resolved luminescence-based assay for thyroglobulin.

Chih-Ching Huang1, Tai-Yuan Lin, Wen-Shen Yu

  • 1Institute of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan.

Journal of Biomedical Nanotechnology
|March 6, 2010
PubMed
Summary
This summary is machine-generated.

A new time-resolved luminescence assay uses alpha-D-mannose-conjugated gold nanodots for sensitive detection of thyroglobulin (Tg), a thyroid cancer marker. This method offers a rapid and specific approach for early cancer diagnosis.

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Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Thyroglobulin (Tg) is a key biomarker for thyroid cancer.
  • Existing detection methods may lack sensitivity or require complex procedures.
  • Development of novel, sensitive, and selective assays is crucial for early cancer diagnosis.

Purpose of the Study:

  • To develop a time-resolved luminescence (TRL) assay for sensitive and selective detection of thyroglobulin (Tg).
  • To utilize water-soluble alpha-D-mannose-conjugated gold nanodots (Man-Au NDs) for this assay.
  • To evaluate the assay's performance, including sensitivity and specificity, for potential cancer diagnosis.

Main Methods:

  • Synthesis of alpha-D-mannose-conjugated gold nanodots (Man-Au NDs) with specific optical properties.
  • Development of a TRL assay based on competitive binding between Tg and Man-Au NDs to concanavalin A (Con A).
  • Quantification of Tg by measuring changes in luminescence intensity and lifetime.

Main Results:

  • Man-Au NDs exhibited strong luminescence with long lifetimes (> 500 ns) and large Stokes' shift (> 150 nm).
  • The TRL assay demonstrated a dose-dependent response to Tg in the nanomolar range (0.1-2.5 nM).
  • The assay achieved highly sensitive detection of Tg (as low as 90 pM) even in the presence of interfering substances like BSA.

Conclusions:

  • The developed Man-Au NDs-based TRL assay provides a sensitive, selective, and label-free method for Tg detection.
  • This assay shows significant potential for rapid and accurate diagnosis of thyroid cancer.
  • The approach highlights the utility of functionalized nanomaterials in advanced diagnostic tools.