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Toxicity assessment of nano-TiO2 in Apis mellifera L., 1758: histological and immunohistochemical assays.
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2019-11-27 , DOI: 10.1002/jemt.23418
Giulia Ferrara 1 , Antonio Salvaggio 2 , Roberta Pecoraro 1 , Elena Maria Scalisi 1 , Andrea Maria Presti 1 , Giuliana Impellizzeri 3 , Maria Violetta Brundo 1
Affiliation  

The aim of this study was to evaluate the toxicity of titanium dioxide nanoparticles (TiO2NPs) by short‐term toxicity tests in Apis mellifera, considered an excellent bioindicator organism mainly due to its sensitivity. Bees have been exposed to several concentrations of TiO2NPs (1 × 10−3, 1 × 10−4, 1 × 10−5, 1 × 10−6 mg/10 ml) for 10 days. Morphostructural and histological assays were done on gut and honey sac. The research of exposure biomarkers like metallothioneins 1 (MT1) and Heat Shock Protein 70 (HSP70) was performed to verify if a detoxification mechanism has been activated in the exposed animals. No histological alteration on the epithelium of the gut and honey sac were observed in exposed samples. A significant positivity for anti‐MT1 antibody was observed only in the honey sac cells. A weak positivity for HSP70 was observed in both structures analyzed. In several studies have shown the non‐toxicity of TiO2NPs on other model organisms, in our study, titanium dioxide nanoparticles was proven to be highly toxic at the highest concentration tested (100% of lethality to 1 × 10−3 mg/10 ml) and moderately toxic at lower concentrations. Honey bees proved to be excellent models for study of NPs toxicity and for monitoring environment.

中文翻译:

纳米二氧化钛在Apis mellifera L.中的毒性评估,1758:组织学和免疫组化分析。

这项研究的目的是通过在蜜蜂(Apis mellifera)中进行短期毒性测试来评估二氧化钛纳米颗粒(TiO 2 NPs)的毒性,该蜜蜂由于其敏感性而被认为是一种出色的生物指示生物。蜜蜂已经暴露于几种浓度的TiO 2 NPs(1×10 -3,1 ×10 -4,1 ×10 -5,1 ×10 -6毫克/ 10毫升),持续10天。在肠道和蜂蜜囊上进行形态结构和组织学测定。进行了诸如金属硫蛋白1(MT1)和热休克蛋白70(HSP70)等暴露生物标志物的研究,以验证暴露动物中的解毒机制是否已被激活。在暴露的样品中未观察到肠道和蜂蜜囊上皮的组织学改变。仅在蜂蜜囊细胞中观察到抗MT1抗体的显着阳性。在所分析的两种结构中均观察到HSP70的阳性。在一些研究中表明TiO 2 NP对其他模型生物无毒,在我们的研究中,二氧化钛纳米颗粒在最高测试浓度下被证明具有高毒性(致死率100%,1×10 -3毫克/ 10毫升),在较低浓度下具有中等毒性。蜜蜂被证明是研究NPs毒性和监测环境的极好模型。
更新日期:2019-11-27
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