MO Hong-qian,XU Hua,XU Bin,LI Yong-qi,CHEN Jia,XUE Jin-juan,KONG Lin-lin,WU Jian-feng,LIU Yu-long,XIE Jian-wei,XIONG Zhi-li.Research on Environmental Exposure Traceability of Organophosphorus Nerve Agents Based on the Tyrosine Adducts of Plant RuBisCO[J].Journal of Instrumental Analysis,2025,44(09):1933-1940.
MO Hong-qian,XU Hua,XU Bin,LI Yong-qi,CHEN Jia,XUE Jin-juan,KONG Lin-lin,WU Jian-feng,LIU Yu-long,XIE Jian-wei,XIONG Zhi-li.Research on Environmental Exposure Traceability of Organophosphorus Nerve Agents Based on the Tyrosine Adducts of Plant RuBisCO[J].Journal of Instrumental Analysis,2025,44(09):1933-1940. DOI: 10.12452/j.fxcsxb.25061010.
Research on Environmental Exposure Traceability of Organophosphorus Nerve Agents Based on the Tyrosine Adducts of Plant RuBisCO
Due to the biosafety and ethical limitations of biomedical samples in the traceability of environmental exposure to organophosphorus nerve agents(OPNAs),the environmental exposure of OPNAs was traced and analyzed by identifying the OPNAs tyrosine adducts(OPNAs-Tyr) of plant abundant ribosyl-1,5-diphosphate carboxylase(RuBisCO) in the manuscript. Arabidopsis thaliana and rice(
Oryza sativa
L.
cv
.
‘Nipponbar
e’) were selected as the main research objects and exposed to VX(VX),Tabun(GA) and Soman(GD),and the OPNAs-Tyr adducts were identified by high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS) analysis. The tyrosine adducts formed by RuBisCO protein with VX,GA and GD were successfully identified. The enzymatic hydrolysis conditions,solid-phase extraction conditions and the purification method of RuBisCO protein(protamine sulfate precipitation method(PSP)) were optimized. In Arabidopsis thaliana,the minimum detectable exposure doses of VX,GA and GD were 7.4 μg per plant,9.3 μg per plant and 91 ng per plant,respectively. In rice,the minimum detectable exposure doses for VX were 74 ng per plant,and the same results for GA and GD were obtained compared with those in Arabidopsis thaliana. The adducts concentration was positively correlated with the exposure dose and could remain stable up to six months in freeze-dried plant. This study demonstrates for the first time that the tyrosine adducts from the RuBisCO protein can be used as a reliable biomarker for the traceability analysis of environmental exposure to OPNAs. Given that RuBisCO protein is the most abundant edible protein in plants,this study also provides new ideas for the analysis of organophosphorus pesticide residue pollution in green food.
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