Publication details

A Clearance Period after Soluble Lead Nanoparticle Inhalation Did Not Ameliorate the Negative Effects on Target Tissues Due to Decreased Immune Response

Authors

DUMKOVÁ Jana SMUTNÁ Tereza VRLÍKOVÁ Lucie DOČEKAL Bohumil KRISTEKOVÁ Daniela VEČEŘA Zbyněk HUSÁKOVÁ Zuzana JAKEŠOVÁ Veronika JEDLIČKOVÁ Adriena MIKUŠKA Pavel ALEXA Lukáš COUFALÍK Pavel TVRDOŇOVÁ Michaela KŘŮMAL Kamil VACULOVIČ Tomáš KANICKÝ Viktor HAMPL Aleš BUCHTOVÁ marcela

Year of publication 2020
Type Article in Periodical
Magazine / Source International Journal of Molecular Sciences
MU Faculty or unit

Faculty of Science

Citation
Web https://www.mdpi.com/1422-0067/21/22/8738
Doi http://dx.doi.org/10.3390/ijms21228738
Keywords clearance; lead nanoparticles; inhalation; LA-ICP-MS imaging; toxicity
Description The inhalation of metal (including lead) nanoparticles poses a real health issue to people and animals living in polluted and/or industrial areas. In this study, we exposed mice to lead(II) nitrate nanoparticles [Pb(NO3)(2) NPs], which represent a highly soluble form of lead, by inhalation. We aimed to uncover the effects of their exposure on individual target organs and to reveal potential variability in the lead clearance. We examined (i) lead biodistribution in target organs using laser ablation and inductively coupled plasma mass spectrometry (LA-ICP-MS) and atomic absorption spectrometry (AAS), (ii) lead effect on histopathological changes and immune cells response in secondary target organs and (iii) the clearance ability of target organs. In the lungs and liver, Pb(NO3)(2) NP inhalation induced serious structural changes and their damage was present even after a 5-week clearance period despite the lead having been almost completely eliminated from the tissues. The numbers of macrophages significantly decreased after 11-week Pb(NO3)(2) NP inhalation; conversely, abundance of alpha-smooth muscle actin (alpha-SMA)-positive cells, which are responsible for augmented collagen production, increased in both tissues. Moreover, the expression of nuclear factor kappa B (NF-kappa B) and selected cytokines, such as tumor necrosis factor alpha (TNF alpha), transforming growth factor beta 1 (TGF beta 1), interleukin 6(IL-6), IL-1 alpha and IL-1 beta , displayed a tissue-specific response to lead exposure. In summary, diminished inflammatory response in tissues after Pb(NO3)(2) NPs inhalation was associated with prolonged negative effect of lead on tissues, as demonstrated by sustained pathological changes in target organs, even after long clearance period.
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