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J Agric Food Chem:长期摄入二氧化钛纳米颗粒对肠道炎症的影响

2020-05-08 MedSci原创 MedSci原创

早期摄取食物中的物质,如增白剂二氧化钛纳米粒子(TiO2 NPs),可导致成年后的长期影响。我们的目的是探讨长期饮食摄入TiO2 NPs可能产生的不良影响。

早期摄取食物中的物质,如增白剂二氧化钛纳米粒子(TiO2 NPs),可导致成年后的长期影响。我们的目的是探讨长期饮食摄入TiO2 NPs可能产生的不良影响。

 

从断奶后喂养2-3个月后,暴露于TiO2 NPs的小鼠表现出较低的体重和诱发肠道炎症。然而,这种现象在肠道微生物群移除的小鼠中没有观察到。TiO2 NPs暴露很少影响微生物群落的多样性,但显著降低了包括双歧杆菌和乳酸菌在内的几种益生菌分类群的丰度。此外,TiO2 NPs会加重DSS诱导的慢性结肠炎和体内免疫反应,并减少肠系膜淋巴结中CD4+T细胞、调节性T细胞和巨噬细胞的数量。

 

因此,膳食中的TiO2 NPs可能会干扰免疫系统的平衡和肠道微生物群的动态,从而导致低度肠道炎症,加重对外界刺激的免疫反应,从而带来潜在的健康风险。

 

原始出处:

 

Wei Mu, Yong Wang, et al., Effect of Long-Term Intake of Dietary Titanium Dioxide Nanoparticles on Intestine Inflammation in Mice. J Agric Food Chem. 2019 Aug 21;67(33):9382-9389. doi: 10.1021/acs.jafc.9b02391. Epub 2019 Aug 7.

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    2021-03-17 30397613
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