Development of a monoclonal antibody-based enzyme-linked immunosorbent assay for the analysis of 6-benzylaminopurine and its ribose adduct in bean sprouts. (15th September 2016)

• Record Type: Journal Article
• Authors: Zhang, Wei; He, Lishan; Zhang, Rui; Guo, Suqin; Yue, Huanfang; Ning, Xiangxue; Tan, Guiyu; Li, Qing X.; Wang, Baomin
• Is Part Of: Food chemistry. Volume 207(2016)
• Page Start: 233
• Page End: 238
• Publication Date: 2016-09-15
• Subjects: 6-Benzylaminopurine (PubChem CID: 62389) -- 6-Benzylaminopurine riboside (PubChem CID: 92208) -- Benzyladenosine (PubChem CID: 250699); 6-Benzylaminopurine -- Monoclonal antibody -- ELISA -- Food safety -- Plant growth regulator; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2016.03.103
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: This is the first paper on mAb-based icELISA for 6-BA in bean sprouts. 6-BAR was confirmed by LC–ESI-MS as a metabolite of 6-BA in bean sprouts. The icELISA could sensitively detect 6-BAR, as a potential biomarker. The icELISA offers an advantage for detecting trace level of 6-BA in bean sprouts. Abstract: 6-Benzylaminopurine (6-BA), a cytokinin plant growth regulator, has been banned for use in bean sprout production in China. An indirect competitive enzyme-linked immunosorbent assay (icELISA) was developed with a specific monoclonal antibody (mAb 3E5). The assay showed a half-maximum inhibition concentration (IC50 ) and detection range of 18.9 ng/mL and 3.6–106 ng/mL, respectively. Recoveries of 6-BA spiked in home cultured bean sprout samples averaged from 75% to 89% with a correlation coefficient (R 2 ) of 0.998 between the results determined by icELISA and those by liquid chromatography–electrospray ionization quadrupole Orbitrap mass spectrometry (LC–ESI-MS). LC–ESI-MS showed that 6-BA had been partially metabolized to 6-benzylaminopurine riboside (6-BAR) in the positive samples. The content of 6-BA determined by icELISA was about 5–70 times higher than that of LC–ESI-MS because mAb 3E5 had 315% cross-reactivity with 6-BAR. Such icELISA being ultra-sensitive to 6-BAR would allow quick monitoring of 6-BA by detecting 6-BAR as a potential biomarker.