畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (4): 1919-1933.doi: 10.11843/j.issn.0366-6964.2025.04.039

• 基础兽医 • 上一篇    下一篇

大麻二酚通过BRD4/AMPK/mTOR信号通路拮抗双酚A诱导的猪肠上皮细胞凋亡和自噬

侯宛辰(), 徐童*()   

  1. 东北农业大学动物医学学院, 哈尔滨 150030
  • 收稿日期:2024-05-20 出版日期:2025-04-23 发布日期:2025-04-28
  • 通讯作者: 徐童 E-mail:wanchenhouneau@163.com;tongxu@neau.edu.cn
  • 作者简介:侯宛辰(2002-), 女, 黑龙江哈尔滨人, 本科生, 主要从事药理毒理学研究, E-mail: wanchenhouneau@163.com
  • 基金资助:
    东北农业大学“青年才俊”项目;2023年国家级大学生创新创业训练计划项目(SIPT项目编号:202310224097)

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

摘要:

本研究旨在探究大麻二酚(cannabidiol, CBD)通过BRD4/AMPK/mTOR信号通路缓解双酚A(bisphenol A, BPA)导致的猪肠上皮细胞(pig intestinal epithelial cells, IPEC-J2)的凋亡和自噬的作用机制。首先通过CCK-8法测定细胞活力,筛选出BPA对IPEC-J2细胞的半数抑制浓度和CBD对BPA的最适拮抗剂量。用分组比较方法,将试验分为空白对照组、BPA组(150 μmol·L-1 BPA)、BPA+CBD组(150 μmol·L-1 BPA+10 μmol·L-1 CBD)、BPA+CBD+CQ组(150 μmol·L-1 BPA+10 μmol·L-1 CBD+20 μmol·L-1 CQ)和CBD(10 μmol·L-1 CBD)组。通过AO/EB染色法以及流式细胞术检测IPEC-J2细胞的凋亡率;通过DCFH-DA法检测细胞中ROS水平;通过氧化应激试剂盒检测氧化应激水平;通过免疫荧光技术检测LC3-Ⅱ蛋白表达水平;采用实时荧光定量PCR(qRT-PCR)和蛋白质印迹法(Western blot)来检测细胞凋亡、自噬、肠紧密连接蛋白和BRD4/AMPK/mTOR信号通路相关基因的表达水平。结果表明,经150 μmol·L-1 BPA处理,IPEC-J2细胞凋亡和自噬水平均升高,经10 μmol·L-1 CBD处理后,细胞凋亡和自噬水平均降低;CBD可以显著下调由BPA引起的ROS和MDA水平升高(P < 0.05),上调BPA引起的GSH-Px活性降低(P < 0.05);CBD可以显著下调由BPA引起的细胞凋亡相关基因(Bax和caspase-3)、细胞自噬相关基因(P62、LC3-Ⅱ/LC3-Ⅰ和ATG5)和BRD4/AMPK/mTOR通路(AMPK)相关基因的表达水平升高(P < 0.05),上调BPA引起的LAMP1、Bcl-2、BRD4、mTOR、ZO-1和Claudin-1的表达水平降低(P < 0.05);免疫荧光结果表明,CBD可以显著降低由BPA所诱导的IPEC-J2细胞LC3-Ⅱ的表达与分布(P < 0.05)。综上所述,CBD可以缓解BPA导致的IPEC-J2细胞氧化应激,进而通过BRD4/AMPK/mTOR信号通路拮抗BPA诱导的IPEC-J2细胞凋亡和自噬。

关键词: 双酚A, 大麻二酚, 猪肠上皮细胞, 细胞凋亡, 细胞自噬, BRD4/AMPK/mTOR

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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