Aptamer as capture agent in enzyme-linked apta-sorbent assay (ELASA) for ultrasensitive detection of Aflatoxin B1.

Monali, Mukherjee and Manonmani, H. K. and Praveena, Bhatt (2018) Aptamer as capture agent in enzyme-linked apta-sorbent assay (ELASA) for ultrasensitive detection of Aflatoxin B1. Toxicon, 156. pp. 28-33.

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Abstract

Aflatoxin B1 (AFB1), is one of the most toxic mycotoxins found to contaminate various food commodities like cereals, dried fruits, tree nuts, spices and crude vegetable oils. In spite of considerable progress in analytical techniques, there is still a need to develop rapid and highly sensitive detection platforms for AFB1. In this study, AFB1 specific aptamer was used as a capture molecule to develop an enzyme-linked apta-sorbent assay (ELASA) for ultrasensitive detection of AFB1. Under optimized conditions, the assay had a linear detection range from 1 μg to 1 pg with a limit of detection (LOD) of 1 pg/mL in buffer. Conventional ELISA with AFB1 hapten as the capture agent (LOD = 10 pg/mL) was also carried out to compare the results with the present method. Recovery studies in food samples like dried red chillies, groundnut and pepper using both the methods was found to be in the range of 88.49–106.4% at 10 ng/mL and 87.4% to 95.8% at 5 ng/mL for ELASA and 76.56–127.68% at 10 ng/mL and 82–101.2% at 5 ng/mL for ELISA. Higher detection (10 fold) and better recovery using ELASA suggest that the method could offer an early, ultrasensitive, high-throughput, qualitative and semi-quantitative detection of AFB1 in contaminated food samples.

Item Type:	Article
Uncontrolled Keywords:	Aflatoxin B1 ELASA Aptamer-antibody Colorimetric Capture agent
Subjects:	600 Technology > 08 Food technology > 16 Nutritive value > 05 Enzymes
Divisions:	Food Microbiology Food Protectants and Infestation Control
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	05 Feb 2019 07:41
Last Modified:	05 Feb 2019 07:41
URI:	http://ir.cftri.res.in/id/eprint/13920

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