Highly amplified detection of visceral adipose tissue-derived serpin (vaspin) using a cognate aptamer duo

Nurul Hanun Ahmad Raston, Man Bock Gu

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A cognate aptamer duo for visceral adipose tissue-derived serpin (vaspin) which distinctively bind to two different sites on vaspin with high affinity and specificity were successfully developed by using graphene oxide-based systematic evolution of ligands by exponential enrichment (GO-SELEX), which offers immobilization-free screening of aptamers. The specific and simultaneous bindings of this aptamer duo (V1 and V49 aptamers) to the different sites of vaspin were confirmed by circular dichroism (CD) analysis and both sandwich-type surface plasmon resonance (SPR) and quantum dot labelled fluorescence imaging analysis (V1 aptamer serves as primary capturing aptamer and V49 aptamer as secondary signalling aptamer or vice versa). With this vaspin cognate aptamer duo on SPR platform, the detection of the target vaspin were improved to the limit of detection down to 3.5. ng/ml in buffer and 4.7. ng/ml in human serum samples. This cognate aptamer duo based biosensor could be utilized in the early diagnosis of type-2 diabetes.

Original languageEnglish
Pages (from-to)261-267
Number of pages7
JournalBiosensors and Bioelectronics
Volume70
DOIs
Publication statusPublished - 2015 Aug 5

Fingerprint

Serpins
Intra-Abdominal Fat
Tissue
Surface Plasmon Resonance
Surface plasmon resonance
SELEX Aptamer Technique
Quantum Dots
Graphite
Optical Imaging
Dichroism
Biosensing Techniques
Medical problems
Circular Dichroism
Biosensors
Immobilization
Oxides
Graphene
Type 2 Diabetes Mellitus
Semiconductor quantum dots
Limit of Detection

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Biotechnology
  • Electrochemistry

Cite this

Highly amplified detection of visceral adipose tissue-derived serpin (vaspin) using a cognate aptamer duo. / Ahmad Raston, Nurul Hanun; Gu, Man Bock.

In: Biosensors and Bioelectronics, Vol. 70, 05.08.2015, p. 261-267.

Research output: Contribution to journalArticle

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