PMID- 38478886 OWN - NLM STAT- MEDLINE DCOM- 20240328 LR - 20240328 IS - 1520-5118 (Electronic) IS - 0021-8561 (Linking) VI - 72 IP - 12 DP - 2024 Mar 27 TI - Development of an Open Droplet Microchannel-Based Magnetosensor for Immunofluorometric Assay of Trimethoprim in Chicken and Pork Samples with a Wide Linear Range. PG - 6772-6780 LID - 10.1021/acs.jafc.4c00307 [doi] AB - Trimethoprim (TMP), functioning as a synergistic antibacterial agent, is utilized in diagnosing and treating diseases affecting livestock and poultry. Human consumption of the medication indirectly may lead to its drug accumulation in the body and increase drug resistance due to its prolonged metabolic duration in livestock and poultry, presenting significant health hazards. Most reported immunoassay techniques, such as ELISA and immunochromatographic assay (ICA), find it challenging to achieve the dual advantages of high sensitivity, simplicity of operation, and a wide detection range. Consequently, an open droplet microchannel-based magnetosensor for immunofluorometric assay (OMM-IFA) of trimethoprim was created, featuring a gel imager to provide a signal output derived from the highly specific antibody (Ab) targeting trimethoprim. The method exhibited high sensitivity in chicken and pork samples, with LODs of 0.300 and 0.017 ng/mL, respectively, and a wide linear range, covering trimethoprim's total maximum residue limits (MRLs). Additionally, the spiked recoveries in chicken and pork specimens varied between 81.6% and 107.9%, maintaining an acceptable variation coefficient below 15%, aligning well with the findings from the ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) technique. The developed method achieved a much wider linear range of about 5 orders of magnitude of 10(-2)-10(3) levels with grayscale signals as the output signal, which exhibited high sensitivity, excellent applicability and simple operability based on magnetic automation. FAU - Wang, Lei AU - Wang L AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Zhang, Yongyi AU - Zhang Y AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Zeng, Dao-Ping AU - Zeng DP AD - Wens Institute, Wens Foodstuff Groups Co., Ltd., Yunfu 527499, China. FAU - Zhu, Yuxian AU - Zhu Y AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Ling, Zhizhou AU - Ling Z AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Wang, Yu AU - Wang Y AD - Guangzhou Institute for Food Inspection, Guangzhou 510410, China. FAU - Yang, Jinyi AU - Yang J AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Wang, Hong AU - Wang H AUID- ORCID: 0000-0001-9136-8959 AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Xu, Zhen-Lin AU - Xu ZL AUID- ORCID: 0000-0002-1197-4615 AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Tian, Yuanxin AU - Tian Y AUID- ORCID: 0000-0003-3847-559X AD - Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China. FAU - Sun, Yuanming AU - Sun Y AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. FAU - Shen, Yu-Dong AU - Shen YD AUID- ORCID: 0000-0001-9236-5557 AD - Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China. LA - eng PT - Journal Article DEP - 20240313 PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - AN164J8Y0X (Trimethoprim) SB - IM MH - Animals MH - Humans MH - Swine MH - Trimethoprim MH - Chromatography, Liquid MH - Chickens MH - *Red Meat MH - *Pork Meat MH - Tandem Mass Spectrometry/methods MH - Poultry MH - Fluoroimmunoassay MH - Chromatography, High Pressure Liquid/methods OTO - NOTNLM OT - immunofluorometric assay OT - magnetosensor OT - monoclonal antibody OT - open droplet microchannel OT - trimethoprim EDAT- 2024/03/13 18:46 MHDA- 2024/03/28 06:46 CRDT- 2024/03/13 16:43 PHST- 2024/03/28 06:46 [medline] PHST- 2024/03/13 18:46 [pubmed] PHST- 2024/03/13 16:43 [entrez] AID - 10.1021/acs.jafc.4c00307 [doi] PST - ppublish SO - J Agric Food Chem. 2024 Mar 27;72(12):6772-6780. doi: 10.1021/acs.jafc.4c00307. Epub 2024 Mar 13.