Novel screening test for celiac disease using peptide functionalised gold nanoparticles
Novel screening test for celiac disease using peptide functionalised gold nanoparticles作者机构：Institute for Biomedical Materials and Devices Faculty of Science University of Tech-nology Sydney School of Life Sciences Faculty of Science University of Technology Sydney
出 版 物：《World Journal of Gastroenterology》 (世界胃肠病学杂志（英文版）)
年 卷 期：2018年第24卷第47期
页 面：5379-5390页
核心收录：
基 金：Supported by the Australian Government Research Training Program Scholarship,No.IH150100028 the Australian Research Council National Health and Medical Research Council for financial support,No.APP1101258
主 题：Celiac disease Serological point-of-care Gold nanoparticles Diagnostic test Autoantibodies
摘 要：AIM To develop a screening test for celiac disease based on the coating of gold nanoparticles with a peptide sequence derived from gliadin, the protein that triggers celiac ***20 nm gold nanoparticles were first coated with NeutrAvidin. A long chain Polyethylene glycol(PEG) linker containing Maleimide at the Ω-end and Biotin group at the α-end was used to ensure peptide coating to the gold nanoparticles. The maleimide group with the thiol(-SH) side chain reacted with the cysteine amino acid in the peptide sequence and the biotinylated and PEGylated peptide was added to the NeutrAvidin coated gold nanoparticles. The peptide coated gold nanoparticles were then converted into a serological assay. We used the peptide functionalised gold nanoparticle-based assay on thirty patient serum samples in a blinded assessment and compared our results with the previously run serologicaland pathological tests on these *** A stable colloidal suspension of peptide coated gold nanoparticles was obtained without any aggregation. An absorbance peak shift as well as color change was caused by the aggregation of gold nanoparticles following the addition of anti-gliadin antibody to peptide coated nanoparticles at levels associated with celiac disease. The developed assay has been shown to detect anti-gliadin antibody not only in quantitatively spiked samples but also in a small-scale study on real non-hemolytic celiac disease patient s *** The study demonstrates the potential of gold nanoparticlepeptide based approach to be adapted for developing a screening assay for celiac disease diagnosis. The assay could be a part of an exclusion based diagnostic strategy and prove particularly useful for testing high celiac disease risk populations.
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