Development of antibody-based microarray assay forquantitative detection of aflatoxin B1

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 470

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شناسه ملی سند علمی:

JR_IJVM-8-2_009

تاریخ نمایه سازی: 26 اردیبهشت 1394

چکیده مقاله:

BACKGROUND: Aflatoxin B1 (AFB1) is a toxic metabolite produced by Aspergillus species that contaminates a wide range of agricultural products. OBJECTIVES: This study was designed to develop a rapid and highly sensitive immunoassay method in microarray format for quantitative detection of AFB1 to evaluate the potential of microarray platform for high-throughput screening, which can be beneficial in food and feed industry. METHODS: Following successful optimization, using an indirect competitive immunoassay in dot blot format, AFB1-bovine serum albumin (AFB1-BSA) conjugate was contact-printed onto 16 isolated subarrays on multi-pad nitrocellulose coated slides; subsequently used in competitive binding assays. RESULTS: Using the aforementioned assay, AFB1 was determined from 15 pg/g to 3.04 ng/g working range with detection limit (LOD) of 1 pg/g. To evaluate assay performance in real food matrices, the authors spiked wheat samples with different concentration of AFB1. After extraction, working ranges of 0.11-4.15 ng/g with detection limit of 30pg/g was determined. Good recoveries (94±9%) were obtained, demonstrating accurate detection of AFB1 concentrations in wheat samples. Assay procedure completed in 3 hours. CONCLUSIONS: The results indicated that the proposed developed assay in microarray formatcould be used for rapid and sensitive detection of AFB1in wheat samples

نویسندگان

A Beizaei

Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran,Iran

A Kamkar

Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran,Iran

A Kamkar

Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran,Iran

A Misaghi

Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran,Iran