PMID- 34000636 OWN - NLM STAT- MEDLINE DCOM- 20210707 LR - 20210707 IS - 1873-7072 (Electronic) IS - 0308-8146 (Linking) VI - 360 DP - 2021 Oct 30 TI - Competitive and noncompetitive fluorescence polarization immunoassays for the detection of benzothiostrobin using FITC-labeled dendrimer-like peptides. PG - 130020 LID - S0308-8146(21)01026-8 [pii] LID - 10.1016/j.foodchem.2021.130020 [doi] AB - Peptides obtained from phage display libraries are valuable reagents for small-molecule immunoassays. However, their application in fluorescence polarization immunoassays (FPIAs) is limited by phage particles. Here, monomer, dendrimer-like dimer, tetramer peptidomimetic and anti-immunocomplex tracers were designed and synthesized using lysine as special scaffolds and spacers to develop competitive and noncompetitive FPIAs for benzothiostrobin. The affinity between tracers and monoclonal antibodies or immunocomplexes increased with the tracer valence. A higher signal-to-noise ratio and sensitivity could be generated in the FPIAs based on tetramer tracers. The sensitivities of competitive (50% inhibitory concentration) and noncompetitive (50% saturation concentration) FPIAs were 19.71 +/- 4.65 and 40.43 +/- 2.73 ng mL(-1), respectively. The spiked recoveries were 78.3%-105.2% with relative standard deviations (RSDs) of 0.7%-15.4% for the competitive FPIA, while 78.7%-115.3% with RSDs of 0.7%-12.5% for the noncompetitive FPIA. The amounts of benzothiostrobin in rice detected by the FPIAs were consistent with those detected by high performance liquid chromatography. CI - Copyright (c) 2021 Elsevier Ltd. All rights reserved. FAU - Chen, He AU - Chen H AD - College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. FAU - You, Tianyang AU - You T AD - College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. FAU - Zong, Lingfeng AU - Zong L AD - College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. FAU - Mukhametova, Liliya I AU - Mukhametova LI AD - Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia. FAU - Zherdev, Dmitry O AU - Zherdev DO AD - Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia. FAU - Eremin, Sergei A AU - Eremin SA AD - Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia. FAU - Ding, Yuan AU - Ding Y AD - College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. FAU - Wang, Minghua AU - Wang M AD - College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. FAU - Hua, Xiude AU - Hua X AD - College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. Electronic address: huaxiude@njau.edu.cn. LA - eng PT - Journal Article DEP - 20210506 PL - England TA - Food Chem JT - Food chemistry JID - 7702639 RN - 0 (Acrylates) RN - 0 (Benzothiazoles) RN - 0 (Dendrimers) RN - 0 (Peptides) RN - 0 (benzothiostrobin) RN - I223NX31W9 (Fluorescein-5-isothiocyanate) SB - IM MH - Acrylates/*analysis MH - Benzothiazoles/*analysis MH - Dendrimers/*chemistry MH - Fluorescein-5-isothiocyanate/*chemistry MH - Fluorescence Polarization Immunoassay/*methods MH - Peptides/*chemistry OTO - NOTNLM OT - Anti-immunocomplex OT - Benzothiostrobin OT - Dendrimer-like peptides OT - Fluorescence polarization immunoassay OT - Peptidomimetic EDAT- 2021/05/18 06:00 MHDA- 2021/07/08 06:00 CRDT- 2021/05/17 20:28 PHST- 2020/08/25 00:00 [received] PHST- 2021/04/22 00:00 [revised] PHST- 2021/05/03 00:00 [accepted] PHST- 2021/05/18 06:00 [pubmed] PHST- 2021/07/08 06:00 [medline] PHST- 2021/05/17 20:28 [entrez] AID - S0308-8146(21)01026-8 [pii] AID - 10.1016/j.foodchem.2021.130020 [doi] PST - ppublish SO - Food Chem. 2021 Oct 30;360:130020. doi: 10.1016/j.foodchem.2021.130020. Epub 2021 May 6.