二氧化纳米颗粒 通过氧化应激破坏老鼠甲状腺组织的超结构和功能
Hong-Zhen Gong1, Sha Li1, Fu-Yi Wang1
1Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China.
Heliyon
|August 12, 2024
概括
二氧化纳米颗粒 (纳米-TiO2) 通过破坏毛囊细胞和增加氧化应激来破坏甲状腺功能. 长期暴露可能会造成甲状腺功能障碍的风险.
科学领域:
- 环境毒理学环境毒理学
- 纳米技术 纳米技术
- 内分泌学 在内分泌学.
背景情况:
- 纳米-TiO2 在消费品中普遍存在,并且可以进入人体.
- 以前的研究表明,纳米-TiO2的系统性影响,但甲状腺的影响是未知的.
研究的目的:
- 研究纳米-TiO2对哺乳动物甲状腺组织学和功能的影响.
- 评估纳米-TiO2对人类甲状腺毛囊细胞活力,亡,炎症和氧化应激的影响.
主要方法:
- 鲁纳米-TiO2 (5毫克/公斤) 给了斯普拉格-道利大鼠3周.
- 甲状腺组织学和功能在老鼠中进行了分析.
- 在体外研究中使用人类甲状腺毛囊细胞来评估纳米TiO2对细胞活力,亡,炎症标记物,抗氧化酶和氧化应激的影响.
主要成果:
- 在老鼠中,纳米TiO2诱导甲状腺毛囊异常和毛囊细胞器官损伤.
- 在老鼠中,纳米-TiO2降低了/合载体 (NIS) 和增加了分裂-酶3,IL-1β和TNF-α.
- 在老鼠中,纳米TiO2暴露增加了血清自由甲状腺素 (FT4) 和甲状腺过氧化酶抗体 (TPO-Ab),并降低了人类甲状腺细胞活力,抗氧化酶活性,同时增加了活性氧物种 (ROS) 和恶性甲 (MDA).
结论:
- 纳米TiO2通过氧化应激破坏甲状腺毛囊上皮细胞结构和功能.
- 这些发现表明,纳米TiO2暴露是甲状腺功能障碍的潜在危险因素.
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