Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (9): 3905-3915.doi: 10.11843/j.issn.0366-6964.2023.09.029

• BASIC VETERINARY MEDICINE • Previous Articles     Next Articles

Effects of Allicin on mRNA Expression of CYP1A2 and Its Enzyme Kinetics in Broilers Liver Tissue

YUAN Heling1, FANG Ci1, HUANG Jinhu1, WANG Xiaoming1, XIAO Wenjun2,3, LIU Ruiting2,3, SHI Rongmei2,3, WANG Liping1*   

  1. 1. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China;
    2. College of Pharmacy, Xinjiang Medical University, Urumqi 830017, China;
    3. Key Laboratory of Garlic Medicinal Research in Xinjiang, Urumuqi 830013, China
  • Received:2022-12-16 Published:2023-09-22

Abstract: Allicin has good antibacterial and antioxidant activities, and is expected to be used as a substitute for antibiotics in the livestock and poultry industry, however, its effect on hepatic drug enzyme (CYP) remains unknown. The study was to investigate the effects of allicin on CYP1A2 enzyme activity, mRNA expression of coding gene and enzyme kinetics in broilers, and to provide a further reference for its rational use in production practice. Ninety one-day-old Arbor Acres (AA) broilers were randomly divided into control group (basal diet group), low-dose allicin group (40 mg·kg-1) and high-dose allicin group (80 mg·kg-1) after 4 days of adaptive breeding. The treatment groups were fed with allicin twice a day for 42 consecutive days. On the 14th, 28th, and 42nd day after treatment of allicin, 10 chickens from each group were randomly selected, respectively and liver microsomes were extracted by calcium ion precipitation method to detect the effects of allicin on CYP1A2 enzyme activity and enzyme kinetics parameters. The mRNA expression of CYP1A2 and nuclear receptor encoding gene CXR were detected by real time RT-PCR. Allicin (40 mg·kg-1, and 80 mg·kg-1) significantly increased the production of acetaminophen, the metabolite phenacetin catalyzed by CYP1A2,on the 14th and 28the day after treatment by 1.2 times and 1.4 times of the control group, respectively (P<0.05), however, the production of acetaminophen on the 42nd day, were significantly decreased to 80% and 62% of the control group, respectively (P<0.001). The variation trend of mRNA expression of CYP1A2 and CXR was consistent with that of enzyme activity. The half maximal inhibitory concentration (IC50) of allicin on CYP1A2 was 18.87 μmol·L-1, and the inhibition constant (Ki) was 10.89 μmol·L-1. Allicin showed a non-competitive inhibition effect on CYP1A2 with a time and concentration-dependent manner. Allicin can affect both CYP1A2 enzyme activity and its encoding gene mRNA expression with a bidirectional manner. The results suggest that allicin has an inhibitory effect on broiler CYP1A2 after long-term application, and clinical attention should be paid to avoid the adverse reactions caused by drug-drug interaction.

Key words: allicin, liver microsome, broiler, CYP1A2, kinetics of enzyme

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