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Related Experiment Video

Updated: Jul 29, 2025

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Pd@Pt nanoparticle-linked immunosorbent assay for quantification of Collagen type II.

Eunice Y Kwon1, Haneen A Abusharkh1, Xiaofan Ruan2

  • 1Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99164-6515, United States.

Analytica Chimica Acta
|May 27, 2023
PubMed
Summary

A new nanoparticle immunoassay accurately quantifies collagen type II, a key protein for cartilage tissue engineering. This cost-efficient method offers a stable alternative to traditional assays for regenerative medicine applications.

Keywords:
Collagen type IIELISA-like formatNanoparticle-linked immunosorbent assayPd@Pt nanoparticlePeroxidase-like catalytic activityPeroxidase-like nanoparticle

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Analytical Chemistry

Background:

  • Collagen type II is crucial for articular cartilage and its tissue engineering.
  • Accurate quantification of collagen type II is increasingly important.
  • Existing quantification methods may have limitations.

Purpose of the Study:

  • To develop a novel nanoparticle-based immunoassay for quantifying collagen type II.
  • To utilize mesoporous palladium@platinum (Pd@Pt) nanoparticles as enzyme alternatives.
  • To establish a sensitive, stable, and cost-efficient assay for collagen type II detection.

Main Methods:

  • Developed a direct sandwich immunoassay using Pd@Pt nanoparticles conjugated with anti-collagen type II antibodies.
  • Employed the peroxidase-like catalytic activity of Pd@Pt nanoparticles.
  • Validated the assay against commercial ELISAs and gene expression analysis.

Main Results:

  • Achieved a limit of detection of 1 ng/mL and a limit of quantification of 9 ng/mL.
  • Demonstrated a broad linear range (1 ng/mL to 50 μg/mL) with good precision (RSD 5.5%).
  • Successfully quantified collagen type II in cartilage tissues across a pH range of 7-9.

Conclusions:

  • The nanoparticle immunoassay is a sensitive, stable, and cost-effective method for collagen type II quantification.
  • This technique offers a viable alternative to traditional enzyme-linked immunosorbent assays (ELISAs).
  • The assay has potential applications in medical, environmental, and biotechnology fields for protein quantification.