Characterization of troponin T binding aptamers for an innovative enzyme-linked oligonucleotide assay (ELONA)

  • Francesca Torrini
  • Pasquale Palladino
  • Alvaro Brittoli
  • Veronica Baldoneschi
  • Maria Minunni
  • Simona ScaranoEmail author
Research Paper
Part of the following topical collections:
  1. New Developments in Biosensors


Early diagnosis of acute myocardial infarction (AMI) is of outmost importance to reduce the mortality rate, and cardiac troponins are considered the gold standard biomarkers of myocardial necrosis. In this scenario, the characterization of two troponin T (TnT)-binding aptamers as viable alternative to antibodies employed on clinical immunoassays is here reported for the first time. Their recognition ability was first investigated through surface plasmon resonance (SPR). Subsequently, an enzyme-linked oligonucleotide assay (ELONA) was developed on common 96-well polystyrene plates, both by direct and sandwich detection strategies for comparison. In both cases, the assay exhibits a detection ability of TnT in the range of low nanomolar but a great advantage on serum interference was obtained by using both aptamers in a sandwich format, with excellent reproducibility and recovery values. Despite the sensitivity needing to be enhanced to the low picomolar range, these results are encouraging for the development of new, low-cost, and rapid antibody-free colorimetric assays for AMI studies based on aptamer–Troponin T recognition.


Aptamers Surface plasmon resonance Troponin T Acute myocardial infarction ELONA 



Simona Scarano thanks the Ministry of Education, University and Research (MIUR) for the scientific program SIR2014 Scientific Independence of young Researchers (RBSI1455LK), ‘Early diagnosis of acute myocardial infarction by nanosensing: coupling emerging bioreceptors for Troponin T to Localized Surface Plasmon Resonance (LSPR) for a high sensitive point-of-care testing’.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Francesca Torrini
    • 1
  • Pasquale Palladino
    • 1
  • Alvaro Brittoli
    • 1
  • Veronica Baldoneschi
    • 1
  • Maria Minunni
    • 1
  • Simona Scarano
    • 1
    Email author
  1. 1.Dipartimento di Chimica “Ugo Schiff”Sesto FiorentinoItaly

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