Publication detail

Magnetic microbead-based upconversion immunoassay with laser-induced breakdown spectroscopy readout for the detection of prostate-specific antigen

ZIKMUNDOVÁ, E. SKLENÁROVÁ, D. KOČÍ, E. ZATLOUKALOVÁ, T. BAČOVÁ, T. MAKHNEVA, E. HOLUB, D. MACHAČOVÁ, E. KOPŘIVOVÁ, H. VYTISKOVÁ, K. POŘÍZKA, P. NOVOTNÝ, K. SKLÁDAL, P. FARKA, Z. KAISER, J.

Original Title

Magnetic microbead-based upconversion immunoassay with laser-induced breakdown spectroscopy readout for the detection of prostate-specific antigen

Type

journal article in Web of Science

Language

English

Original Abstract

Laser-induced breakdown spectroscopy (LIBS) is a promising technique for the readout of immunochemical assays utilizing indirect detection of labels (Tag-LIBS), typically based on nanoparticles. We have previously demonstrated that Tag-LIBS immunoassay employing yttrium-based photon-upconversion nanoparticles (UCNPs) can reach sensitivity similar to commonly used enzyme and fluorescence immunoassays. In this study, we report on further increasing the sensitivity of UCNP-based Tag-LIBS immunoassay by employing magnetic microbeads (MBs) as the solid phase in the determination of cancer biomarker prostate-specific antigen. Due to the possibility of analyte preconcentration, MBs enabled achieving a limit of detection (LOD) of 4.0 pgmL-1, representing two orders of magnitude improvement compared with equivalent microtiter plate-based assay (LOD of 460 pgmL-1). In addition, utilizing MBs opens up the possibility of an internal standardization of the LIBS readout by employing iron spectral lines, which improves the assay robustness by compensating for LIBS signal fluctuations and bead-bound immunocomplexes lost throughout the washing steps. Finally, the practical applicability of the technique was confirmed by the successful analysis of clinical samples, showing a strong correlation with the standard electrochemiluminescence immunoassay. Overall, MB-based Tag-LIBS was confirmed as a promising immunoassay approach, combining fast readout, multiplexing possibilities, and high sensitivity approaching upconversion luminescence scanning while avoiding the requirement of luminescence properties of labels.

Keywords

Tag-LIBS; Photon-upconversion nanoparticle; Magnetic microparticle; Double-pulse LIBS; Prostate-specific antigen

Authors

ZIKMUNDOVÁ, E.; SKLENÁROVÁ, D.; KOČÍ, E.; ZATLOUKALOVÁ, T.; BAČOVÁ, T.; MAKHNEVA, E.; HOLUB, D.; MACHAČOVÁ, E.; KOPŘIVOVÁ, H.; VYTISKOVÁ, K.; POŘÍZKA, P.; NOVOTNÝ, K.; SKLÁDAL, P.; FARKA, Z.; KAISER, J.

Released

1. 11. 2024

Publisher

SPRINGER WIEN

Location

Vienna

ISBN

1436-5073

Periodical

MICROCHIMICA ACTA

Year of study

191

Number

11

State

Republic of Austria

Pages count

10

URL

https://link.springer.com/article/10.1007/s00604-024-06743-0

BibTex

@article{BUT189981,
  author="Eva {Zikmundová} and Dorota {Sklenárová} and Eva {Kočí} and Terezie {Zatloukalová} and Tereza {Bačová} and Ekaterina {Makhneva} and Daniel {Holub} and Eliška {Machačová} and Hana {Kopřivová} and Karolína {Vytisková} and Pavel {Pořízka} and Karel {Novotný} and Petr {Skládal} and Zdeněk {Farka} and Jozef {Kaiser}",
  title="Magnetic microbead-based upconversion immunoassay with laser-induced breakdown spectroscopy readout for the detection of prostate-specific antigen",
  journal="MICROCHIMICA ACTA",
  year="2024",
  volume="191",
  number="11",
  pages="10",
  doi="10.1007/s00604-024-06743-0",
  issn="1436-5073",
  url="https://link.springer.com/article/10.1007/s00604-024-06743-0"
}