Abstract
Polymerase chain reaction (PCR) technology has become a standard technique for the detection of genetically modified organisms (GMOs). However, this method requires a PCR amplification process which is both expensive and time-consuming. Herein, we propose electric field-induced release and measurement (EFIRM) technology as an alternative method for GMO screening. The specificity and sensitivity of the EFIRM assay were proven to be comparable to those of the real-time PCR method for detecting genetically modified soybeans. After all the parameters had been evaluated, the actual evaluation of soybean samples from soybean cargoes was performed. An actual EFIRM screening was performed on 157 soybean cargo samples, which had 102 transgenic soybean samples containing the GTS-40-3-2 gene, through a blind trial at the Dalian port of China. Our results showed that 101 transgenic soybean samples were correctly detected, with only one false-negative case, and 55 non-transgenic soybean samples were detected as negative; this demonstrates that the EFIRM assay is an effective, accurate, simple, and economical novel method for detecting transgenic products, which may have a positive impact on the development of rapid on-site GMO monitoring platforms.
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Funding
This study was financially supported by the Major Project for Cultivation of GMO New Varieties of China (Grant No. 2018ZX08012001), and the Research and Development of Key Technologies for Food Safety of China (Grant No. 2017YFC1600803–03).
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Q.Z. and C.J.: Methodology, validation, investigation, writing–original draft, writing–review and editing. R.L., J.X.: Investigation, validation. Y.W., A.Y.: Conceptualization, validation. W.Z. and J.C: Conceptualization, supervision, funding acquisition, project administration, writing–original draft, writing–review and editing.
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Zheng, Q., Ji, C., Liu, R. et al. Detection of soybean transgenic event GTS-40-3-2 using electric field-induced release and measurement (EFIRM). Anal Bioanal Chem 413, 6671–6676 (2021). https://doi.org/10.1007/s00216-021-03634-8
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DOI: https://doi.org/10.1007/s00216-021-03634-8