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Toxicity and bio-accumulation of inhaled cerium oxide nanoparticles in CD1 mice.
Nanotoxicology ( IF 5 ) Pub Date : 2013-08-07 , DOI: 10.3109/17435390.2013.829877
Srinivas Aalapati 1 , Selvam Ganapathy , Saikumar Manapuram , Goparaju Anumolu , Balakrishna Murthy Prakya
Affiliation  

Male CD1 mice were subjected to nose-inhalation exposure of CeO2 nanoparticles (NPs) for 0, 7, 14 or 28 days with 14 or 28 days of recovery time at an aerosol concentration of 2 mg/m(3). Markers of lung injury and pro-inflammatory cytokines (interleukin-1beta, tumour necrosis factor-alpha, interleukin-6 and macrophage inflammatory protein-2) in bronchoalveolar lavage fluid (BALF), oxidative stress in lungs, bio-accumulation, and histopathology of pulmonary and extrapulmonary tissues were assessed. BALF analysis revealed the induction of pulmonary inflammation, as evident by an increase in the influx of neutrophils with a significant secretion of pro-inflammatory cytokines that lead to generation of oxidative stress and cytotoxicity, as is evident by induction of lipid peroxidation, depletion of glutathione and increased BALF lactate dehydrogenase and protein. The histopathological examination revealed that these inhaled CeO2 NPs were located all over the pulmonary parenchyma, inducing a severe, chronic, active inflammatory response characterised by necrosis, proteinosis, fibrosis and well-formed discrete granulomas in the pulmonary tissue and tubular degeneration leading to coagulative necrosis in kidneys. Inductively coupled plasma optical emission spectrometer results showed a significant bio-accumulation of these particles in the pulmonary and extrapulmonary tissues, even after one month of post-inhalation exposure. Together, these findings suggest that inhalation exposure of CeO2 NPs can induce pulmonary and extrapulmonary toxicity.

中文翻译:

吸入的氧化铈纳米颗粒在CD1小鼠中的毒性和生物蓄积性。

雄性CD1小鼠以2 mg / m的气溶胶浓度接受CeO2纳米颗粒(NPs)的鼻吸入暴露0、7、14或28天,恢复时间为14或28天(3)。肺损伤和促炎细胞因子(白介素-1β,肿瘤坏死因子-α,白介素-6和巨噬细胞炎性蛋白-2),支气管肺泡灌洗液(BALF),肺中的氧化应激,生物蓄积和组织病理学的标志物评估肺和肺外组织。BALF分析揭示了肺部炎症的诱导,这由嗜中性粒细胞的涌入增加而导致,促炎性细胞因子的大量分泌导致氧化应激和细胞毒性的产生,如脂质过氧化的诱导所证实,谷胱甘肽的消耗和BALF乳酸脱氢酶和蛋白质的增加。组织病理学检查显示,这些吸入的CeO2 NP位于整个肺实质内,引起严重,慢性,活动性炎症反应,其特征是肺组织坏死,蛋白变性,纤维化和形态良好的离散性肉芽肿,以及肾小管变性导致凝血性坏死。在肾脏。电感耦合等离子体发射光谱仪的结果表明,即使在吸入后一个月后,这些颗粒在肺和肺外组织中仍具有大量生物积聚。在一起,这些发现表明,吸入CeO2 NP会引起肺和肺外毒性。组织病理学检查显示,这些吸入的CeO2 NP位于整个肺实质内,引起严重,慢性,活动性炎症反应,其特征是肺组织坏死,蛋白变性,纤维化和形态良好的离散性肉芽肿,以及肾小管变性导致凝血性坏死。在肾脏。电感耦合等离子体发射光谱仪的结果表明,即使在吸入后一个月后,这些颗粒在肺和肺外组织中仍具有大量生物积聚。在一起,这些发现表明,吸入CeO2 NP会引起肺和肺外毒性。组织病理学检查显示,这些吸入的CeO2 NP位于整个肺实质,引起严重,慢性,活动性炎症反应,其特征是肺组织坏死,蛋白变性,纤维化和形态良好的离散性肉芽肿,以及肾小管变性导致凝血性坏死。在肾脏。电感耦合等离子体发射光谱仪的结果表明,即使在吸入后一个月后,这些颗粒在肺和肺外组织中仍具有大量生物积聚。在一起,这些发现表明,吸入CeO2 NP会引起肺和肺外毒性。纤维化和肺组织中形态良好的离散肉芽肿以及肾小管变性导致肾脏凝集性坏死。电感耦合等离子体发射光谱仪的结果表明,即使在吸入后一个月后,这些颗粒在肺和肺外组织中仍具有大量生物积聚。在一起,这些发现表明,吸入CeO2 NP会引起肺和肺外毒性。纤维化和肺组织中形态良好的离散肉芽肿以及肾小管变性导致肾脏凝集性坏死。电感耦合等离子体发射光谱仪的结果表明,即使在吸入后一个月后,这些颗粒在肺和肺外组织中仍具有大量生物积聚。在一起,这些发现表明,吸入CeO2 NP会引起肺和肺外毒性。
更新日期:2019-11-01
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