糖通过调节P-葡萄糖蛋白促进小鼠中的甲诱导的毒性
Antioxidants (Basel, Switzerland)
|April 29, 2025
概括
苏克拉和甲 (B[a]P) 的联合暴露会通过抑制P-糖蛋白 (PGP) 排毒,使脏损伤恶化. 糖与PGP结合,增加细胞中的B[a]P积累和氧化应激.
科学领域:
- 毒理学 毒理学 毒理学
- 分子生物学分子生物学
- 脏生理学 脏生理学
背景情况:
- 糖和甲 (B[a]P) 是常见的食品污染物,已知对健康有不良影响.
- 苏克拉和B[a]P对功能的联合影响以及潜在的机制尚不清楚.
- P-糖蛋白 (PGP/ABCB1) 在细胞解毒和药物运输中起着至关重要的作用.
研究的目的:
- 为了研究糖和B[a]P联合暴露导致损伤的机制.
- 阐明P-糖蛋白 (PGP) 在同时暴露的糖和B[a]P的毒性中的作用.
主要方法:
- 同时给C57BL/6N小鼠服用糖和B[a]P,持续90天.
- 在体外测试包括细胞活力,反应性氧物种 (ROS) 测量和使用流细胞计的B[a]P积累.
- 分子对接,CETSA,PCR,西部涂抹和免疫组织化学分析PGP结合和表达.
主要成果:
- 同时暴露显著增加了血清肌素和尿素,表明功能障碍,由N-乙囊 (NAC) 逆转.
- 糖增加了细胞内B[a]P积累,增强了B[a]P诱导的细胞毒性和ROS产生,这种效应被PGP敲击模仿.
- 糖直接与PGP结合,抑制其排泄功能,导致B[a]P保留,随后降低PGP表达的调节.
结论:
- 对糖和B[a]P的联合暴露会通过损害PGP介导的解毒来加剧损伤.
- 糖抑制PGP活动,导致B[a]P积累,氧化应激,并降低细胞中的细胞活力.
- 苏克拉通过直接干扰PGP功能来增强B[a]P毒性,突出结合暴露的风险.
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