高剂量暴露于布틸帕拉本会损害小鼠甲状腺的超结构和功能
Qi-Lan Jiang1, Sha Li2, Yang Zeng3
1Department of Clinical Nutrition, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan Province, China.
Scientific reports
|February 24, 2024
概括
高剂量接触布 (BuP),一种常见的防腐剂,大鼠甲状腺功能受损,甲状腺激素降低和增加抗体. 在实验室中,BuP还损害了甲状腺细胞,这表明它与甲状腺功能低下有关.
科学领域:
- 内分泌学 在内分泌学.
- 毒理学 毒理学 毒理学
- 细胞生物学 细胞生物学
背景情况:
- 烯 (PBs) 是化品和药品中广泛使用的防腐剂.
- 一些PBs,如丁paraben (BuP),可能充当内分泌干扰剂,并由于不完整的生物转化而在体内积累.
研究的目的:
- 在大鼠模型中研究高剂量BuP暴露对甲状腺微观结构,超结构和功能的影响.
- 阐明BuP对人类甲状腺上皮细胞的体外作用机制.
主要方法:
- 鼠每天接受50mg/kg体重BuP的皮下注射,持续4周.
- 评估甲状腺体重,组织学和超结构 (电子显微镜).
- 测量甲状腺/同载体 (NIS),血清甲状腺激素 (T3,T4,自由T3,自由T4) 和甲状腺自身抗体 (TSH,过氧化酶,甲状腺球蛋白).
- 评估了BuP对人类甲状腺细胞系增殖,活力,亡和NIS水平的影响.
主要成果:
- 暴露于BuP会增加甲状腺的重量,并导致不规则的,受损的甲状腺毛囊结构.
- 超结构性损伤包括胀的线粒体和内质网膜,以及减少的上皮微.
- 血清T3和T4水平下降,而TSH和自身抗体增加.
- 在体外,BuP降低了NIS水平,抑制了细胞增殖和活力,并诱导了剂量依赖的亡.
结论:
- 高剂量的BuP暴露会导致大鼠甲状腺的显著结构,超结构和功能损伤.
- 由于BuP破坏了NIS,并在甲状腺细胞中诱导了细胞亡,导致甲状腺功能障碍.
- 这些发现表明BuP是导致甲状腺功能低下的潜在因素.
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