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Gold Nano-Urchin Integrated Label-Free Amperometric Aptasensing Human Blood Clotting Factor IX: A Prognosticative Approach for "Royal Disease"

Gold Nano-Urchin Integrated Label-Free Amperometric Aptasensing Human Blood Clotting Factor IX: A Prognosticative Approach for "Royal Disease"

Iswary Letchumanan, Subash C B Gopinath, M K Md Arshad, Periasamy Anbu, Thangavel Lakshmipriya

Biosens Bioelectron. 2019 Apr 15;131:128-135.

PMID: 30826647

Abstract:

This article is clearly presenting the development of a biosensor for human factor IX (FIX) to diagnose the blood clotting deficiency, a so-called 'Royal disease' using an interdigitated electrode (IDE) with the zinc oxide surface modification. Gold nano-urchins (GNUs) with 60 nm in diameter was integrated into a streptavidin-biotinylated aptamer strategy to enhance the active surface area. Two different comparative studies have been done to validate the system to be practiced in the current work holds with a higher capability for the high-performance sense. Whereby, the presence and absence of GNUs in the aptasensing system for FIX interaction were investigated using the amperometric measurement, using a linear sweep voltage of 0-2 V at 0.01 V step voltage. The detection limit was 6 pM based on 3σ calculation when GNUs integrated aptamer assay was utilized for FIX detection, which shows 8 folds sensitivity enhancement comparing the condition in the absence of GNU and 50 folds higher than sensitive radio-isotope and surface plasmon resonance assays. Albeit, the surface and molecular characterizations were well demonstrated by scanning electron microscopy, atomic force microscopy, 3D nano-profilometry and further supports were rendered by UV-Vis spectroscopy and Enzyme-linked apta-sorbent assay (ELASA). Furthermore, the spiking experiment was done by FIX-spikes in human blood serum in order to demonstrate the stability with a higher non-fouling.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76305	Gold, nano-urchins			Price

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