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Updated: Jun 27, 2026
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Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis
Published on: March 7, 2018
A rapid and sensitive immunonanogold resonance scattering spectral probe for complement 3.
Zhiliang Jiang1, Wenxin Huang, Aihui Liang
1School of Environment and Resource, Guangxi Normal University, Guilin 541004, China; Department of Material and Chemical Engineering, Guilin University of Technology, Guilin 541004, China.
Talanta
|December 17, 2008
Summary
Researchers developed a sensitive assay using gold nanoparticles to detect complement C3 (anti-C3). This method accurately quantifies C3 in human serum, offering a convenient diagnostic tool.
Area of Science:
- Biochemistry
- Nanotechnology
- Immunology
Background:
- Complement C3 (C3) is a crucial protein in the immune system.
- Accurate quantification of C3 is vital for diagnosing various diseases.
- Existing methods for C3 detection may lack sensitivity or selectivity.
Purpose of the Study:
- To develop a novel, sensitive, and selective immunoresonance scattering spectral probe for C3 detection.
- To establish a reliable method for quantifying C3 in biological samples, specifically human serum.
Main Methods:
- Conjugation of 10nm gold nanoparticles with goat anti-human complement 3 (anti-C3) antibodies.
- Utilizing the immune reaction between labeled anti-C3 and C3 in a pH 5.6 buffer with polyethylene glycol (PEG).
- Measuring enhanced resonance scattering (RS) intensity at 560nm to quantify C3 concentration.
Main Results:
- A significant enhancement in RS intensity was observed with increasing C3 concentrations.
- A linear relationship was established between enhanced RS intensity and C3 concentration (8.33–200 ng/mL).
- The assay demonstrated a low detection limit (2.8 ng/mL) and limit of quantification (8.51 ng/mL) for C3.
Conclusions:
- The developed gold nanoparticle-based probe provides a sensitive and selective method for C3 detection.
- The assay is convenient, rapid, and suitable for the quantification of C3 in human serum samples.
- This technique holds potential for clinical diagnostics and immunological research.
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