Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (4): 1919-1933.doi: 10.11843/j.issn.0366-6964.2025.04.039

• Basic Veterinary Medicine • Previous Articles     Next Articles

Cannabidiol Antagonizes BPA-induced Apoptosis and Autophagy in Porcine Intestinal Epithelial Cells through the BRD4/AMPK/mTOR Signaling Pathway

HOU Wanchen(), XU Tong*()   

  1. College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
  • Received:2024-05-20 Online:2025-04-23 Published:2025-04-28
  • Contact: XU Tong E-mail:wanchenhouneau@163.com;tongxu@neau.edu.cn

Abstract:

This study aimed to explore the mechanism of cannabidiol (CBD) in alleviating the apoptosis and autophagy of pig intestinal epithelial cells (IPEC-J2) induced by bisphenol A (BPA) through BRD4/AMPK/mTOR signaling pathway. In this study, the cell viability was measured by CCK-8 method, and the half inhibitory concentration of BPA on IPEC-J2 cells and the optimal dose of CBD antagonist for BPA were screened. Using the group comparison method, The experiment was divided into blank control group, BPA group (150 μmol·L-1 BPA), BPA+CBD group (150 μmol·L-1 BPA+10 μmol·L-1 CBD), BPA+CBD+CQ group (150 μmol·L-1 BPA+10 μmol·L-1 CBD+20 μmol·L-1 CQ) and CBD group (10 μmol·L-1 CBD). The apoptosis rate of IPEC-J2 cells was detected by AO/EB staining and flow cytometry. The ROS levels in cells were detected by DCFH-DA method. Oxidative stress was detected by oxidative stress kit. The expression of LC3-Ⅱ protein was detected by immunofluorescence technique. Quantitative Real-time PCR (qRT-PCR) and Western blot were used to detect the expression of genes related to apoptosis, autophagy, intestinal tight-junction protein and BRD4/AMPK/mTOR signaling pathway. The results showed that apoptosis and autophagy levels of IPEC-J2 cells were increased after 150 μmol·L-1 BPA treatment, and decreased after 10 μmol·L-1 CBD treatment. CBD could significantly down-regulate the increase of ROS and MDA levels caused by BPA (P < 0.05), and up-regulate the decrease of GSH-Px activity (P < 0.05); CBD significantly down-regulated the increase of expression levels of apoptosis related genes (Bax and caspase-3), autophagy related genes (P62, LC3-Ⅱ/LC3-Ⅰ and ATG5) and BRD4/AMPK/mTOR path-related genes (AMPK) induced by BPA (P < 0.05). The expression levels of LAMP1, Bcl-2, BRD4, mTOR, ZO-1 and Claudin-1 were increased (P < 0.05); Immunofluorescence results showed that CBD could significantly reduce the expression and distribution of LC3-Ⅱ in IPEC-J2 cells induced by BPA (P < 0.05). In conclusion, CBD could antagonize BPA-induced apoptosis and autophagy of IPEC-J2 cells through BRD4/AMPK/mTOR signaling pathway.

Key words: bisphenol A, cannabidiol, porcine intestinal epithelial cells, apoptosis, autophagy, BRD4/AMPK/mTOR

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