Journal
ANALYTICA CHIMICA ACTA
Volume 1195, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.aca.2022.339444
Keywords
Aberrant glycans; Antibodies against aberrant glycans; Magnetic separation; Suspension assay
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This study presents the development of a novel SUspension Magnetic-Bead-based Assay (SUMBA) for the detection of antibodies against aberrant glycans (AGA) as potential cancer biomarkers. The SUMBA method was extensively optimised to achieve ultrasensitive detection of AGA with high recovery rates in serum samples.
The development of a novel SUspension Magnetic-Bead-based Assay (SUMBA) for the detection of antibodies against aberrant glycans (AGA) as potential cancer biomarkers is presented here. The SUMBA method was extensively optimised by choosing proper commercially available AGA able to specifically, and with high affinity, recognise aberrant glycans, which were attached to the protein backbone working as a molecular scaffold (a glycoconjugate). The whole SUMBA was optimised using several analytical techniques such as Surface Plasmon Resonance and Energy Dispersive X-ray Spectroscopy. Additionally, the SUMBA method was extensively optimised for signal enhancement. With all steps optimised, we were able to detect AGA ultrasensitively with a limit of detection of 0.45 pM. Moreover, AGA could be detected in serum samples with a recovery index in the range of 98%-104%. (C) 2022 Elsevier B.V. All rights reserved.
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