title: A novel mycotoxin purification system using magnetic nanoparticles for the recovery of aflatoxin B1 and zearalenone from feed.
abstract: In this study, we developed a novel tool for purifying two mycotoxins, aflatoxin B1 (AFB1) and zearalenone (ZEN), in feed. This system utilized monoclonal antibodies (mAbs) against AFB1 and ZEN, and magnetic nanoparticles (MNPs). Among ten MNPs with different diameters and functional groups, a 100-nm diameter MNP (fMA) conjugated to an amine group (-NH(2)) was found to be optimum for coupling with mAbs. The optimal mAb concentrations for coupling to the fMA along with mycotoxin purification capacities of the fMA-mAb conjugates (fMA-AFB1 and fMA-ZEN) were determined. A comparison of mean recovery rates (from corn and product X feed) between the fMA-mAb conjugates and immunoaffinity columns (IAC-AFB1 and IAC-ZEN) showed that the rate for fMA-AFB1 (90~92% and 81~88%) was higher (p > 0.05) than that of IAC-AFB1 (81~84% and 72~78%) for AFB1 (5, 10, 15 ng/mL), and the rate for fMA-ZEN (99~100% and 92~94%) was significantly higher (p < 0.01) than that of IAC-ZEN (86~88% and 81~88%) for ZEN (10, 25, 50 ng/mL) except at a concentration of 10 ng/mL, demonstrating the remarkable purification efficiency of the novel fMA-mAb method. Additionally, mycotoxin purification was much faster using our novel method (approx. 5 min) than the IAC-based technique (>30 min). This study suggests that the novel purification system we developed would be a useful tool for monitoring and regulating mycotoxin contamination in feed, and replace IAC methods.
authors.affiliation: Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang 480-757, Korea.
authors.forename: Hyun-Jung
authors.initials: HJ
authors.lastname: Kim
authors.forename: Sung-Hee
authors.initials: SH
authors.lastname: Kim
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: Lee
authors.forename: Cheong-Up
authors.initials: CU
authors.lastname: Choi
authors.forename: Hee-Soo
authors.initials: HS
authors.lastname: Lee
authors.forename: Hwan-Goo
authors.initials: HG
authors.lastname: Kang
authors.forename: Sang-Ho
authors.initials: SH
authors.lastname: Cha
mesh_terms: D016604:Aflatoxin B1 / Q000276:immunology / Q000302:isolation & purification*; D000704:Analysis of Variance; D000821:Animal Feed / Q000032:analysis*; D000911:Antibodies, Monoclonal / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D015025:Zearalenone / Q000276:immunology / Q000302:isolation & purification*
chemical_list: D000911:Antibodies, Monoclonal; D058185:Magnetite Nanoparticles; D015025:Zearalenone; D016604:Aflatoxin B1