A glass fibre membrane platform for ultra-sensitive detection of cardiac troponin T

Analyst. 2017 Oct 9;142(20):3816-3821. doi: 10.1039/c7an01389b.

Abstract

A glass fibre membrane platform that allows quantification of circulating cTnT with a LoD of 0.87 pg mL-1 is described. The proposed platform uses a glass fibre membrane, DNA-guided detection method, and antibody-conjugated fluorescent beads for the quantification of cTnT in the analytical detection range of 1-120 pg mL-1 at room temperature in 30 min. Glass fibre membranes were chemically modified to immobilize the oligonucleotide probes that catch a biomolecular complex (FB-dAB-cTnT-cAB-DNA) containing complementary oligonucleotides. There were no interferences from human cTnI, cTnC, skTnT, biotin, and hemoglobin (each 1 μg mL-1). The linearity in the serial dilution test of plasma samples indicates that this platform is highly applicable for regular health check-up to assess the risk of AMI and HF.

MeSH terms

  • Adult
  • Antibodies
  • Female
  • Glass*
  • Humans
  • Male
  • Membranes*
  • Middle Aged
  • Oligonucleotides
  • Troponin T / blood*

Substances

  • Antibodies
  • Oligonucleotides
  • Troponin T
  • fiberglass