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肺部炎症反应和纤维素纳米纤维素的保留动态

Katsuhide Fujita¹, Sawae Obara¹, Junko Maru¹

¹Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8569, Japan.

|December 24, 2024

概括

纤维素纳米纤维 (CNFs) 显示最小的急性肺炎,但长期存在,可能导致慢性问题. 对于安全性评估来说,个别的CNF测试至关重要.

科学领域:

生物材料科学生物材料科学
纳米毒理学研究
肺部毒理学肺部毒理学

背景情况:

纤维素纳米纤维 (CNFs) 是先进的生物材料,具有工业用途的理想特性.
潜在的CNF吸入风险需要全面的安全评估.

研究的目的:

为了研究在老鼠的内内灌注后不同类型的CNF的肺炎效应和肺部保留.
评估CNF特征对毒理反应的影响.

主要方法:

在大鼠体内灌注三种不同的CNF类型 (TEMPO-氧化,机械纤维化,短纤维化) 在2.0mg/kg的剂量.
评估28天的肺炎和90天的染色CNFs的肺部保留.
使用脂聚糖化物 (LPS) 控制对内毒素污染的评估.

主要成果:

CNFs被膜巨细胞所细胞化,没有观察到明显的急性炎症.
CNF的特征 (直径,长度) 影响了炎症部位和反应.
内毒素水平对炎症反应的影响有限.
CNFs在肺组织中被长时间保留,表明清除速度缓慢.

结论:

虽然急性炎症是最小的,但长期保留CNFs表明慢性低度炎症的可能性.
由于属性可变性,对每个CNF类型的个性化毒理学评估至关重要.
进一步的研究应该包括除了炎症之外的毒理终点,以充分评估CNF的健康风险.

关键词:

纤维素纳米纤维的纤维素.在内灌注中进行内灌注.肺部保留时间肺部保留时间肺炎是一种肺炎.

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