Abstract
Bovine tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis (MTB) in which it is hard to identify the pathological symptoms. Release of bovine interferon gamma (BoIFN-γ) by T-cells provides an important diagnostic marker of MTB infections. In this work, we developed for the first time an electrochemical aptasensor for sensitive and specific determination of BoIFN-γ. A thiolated IFN-γ-binding aptamer was conjugated with methylene blue (MB) and immobilized on a gold electrode by self-assembly. Binding of IFN-γ to the electrode surface caused a conformational change in the aptamer, decreasing electron transfer efficiency. The redox current was quantified using square wave voltammetry (SWV) and was found to be specific for bovine IFN-γ with detection limit of 0.1 nM in pristine buffer and 0.9 nM in blood. The biosensor described here may, in the future, be used for on-site testing of bovine blood to help better identify and contain outbreaks of bovine TB.
Original language | English (US) |
---|---|
Pages (from-to) | 4527-4532 |
Number of pages | 6 |
Journal | Analytical Methods |
Volume | 9 |
Issue number | 31 |
DOIs | |
State | Published - Aug 21 2017 |
ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)
- Engineering(all)