Acta Veterinaria et Zootechnica Sinica ›› 2021, Vol. 52 ›› Issue (12): 3675-3680.doi: 10.11843/j.issn.0366-6964.2021.012.034

• RESEARCH NOTES • Previous Articles     Next Articles

Effect of Traditional Chinese Medicine Compound Synephrine on the Detection of β-agonists Using Colloidal Gold Immunochromatographic Assay

WANG Zilin1, TANG Ziheng1, LIN Zening1, LIU Wenzi2, LIU Rong2, ZHANG Jiahui2, SHEN Xiangguang2*   

  1. 1. National Reference Laboratory of Veterinary Drug Residues, South China Agricultural University, Guangzhou 510642, China;
    2. Animal Poultry Products Quality Control, Inspection and Testing Center(Guangzhou), Ministry of Agriculture, Guangzhou 510642, China
  • Received:2021-03-24 Online:2021-12-25 Published:2021-12-22

Abstract: This study was conducted to explore the reason why traditional Chinese medicine extractives and swine urines from pigs fed with some herbal were tested positive by CGIA. A LC-MS/MS method was established to determine synephrine in pigs' urine and traditional Chinese medicine extractives. Citri Reticulatae Pericarpium Viride and Citri Reticulatae Pericarpium's extractives were determined, along with urine after herbal feed. In vitro mouse liver microsomes model was used to incubate the extractives of Citri Reticulatae Pericarpium Viride, Citri Reticulatae Pericarpium, Magnoliae Officinalis Cortex, and Chaenomelis Fructus. Synephrine was detected in pig urines after feeding with Citri Reticulatae Pericarpium and Citri Reticulatae Pericarpium Viride, and the concentration was 1.36 and 1.65 μg·mL-1 respectively. The concentration of synephrine in Citri Reticulatae Pericarpium and Citri Reticulatae Pericarpium Viride's extractive was 132.6 and 312.7 μg·mL-1 respectively. Extractives of Magnoliae Officinalis Cortex and Chaenomelis Fructus were tested gradually from positive to negative during 2-5 h incubation. Extractives of Citri Reticulatae Pericarpium Viride and Citri Reticulatae Pericarpium were tested positive during 0-6 h incubation. The experiment group of negative herbs were tested negative during incubation, and control group of synephrine matched were tested positive during 0-6 h incubation. Great dosing of Citri Reticulatae Pericarpium Viride and Citri Reticulatae Pericarpium in swine can cause false positive results of β-agonists'CGIA test in swine urine, and this phenomenon is related to synephrine. Synephrine is hard to be metabolized by mouse liver microsomes in vitro.

Key words: β-agonists, colloidal gold immunochromatographic assay, traditional Chinese medicine, false positive, synephrine

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