Looking for the LOAEL or NOAEL Concentration of Nickel-Oxide Nanoparticles in a Long-Term Inhalation Exposure of Rats

Author:

Katsnelson Boris A.,Chernyshov Ivan N.,Solovyeva Svetlana N.,Minigalieva Ilzira A.,Gurvich Vladimir B.,Valamina Irene E.,Makeyev Oleg H.,Sahautdinova Renata R.,Privalova Larisa I.,Tsaregorodtseva Anastasia E.,Korotkov Artem V.,Shuman Eugene A.,Panov Vladimir G.,Sutunkova Marina P.

Abstract

Rats were exposed to nickel oxide nano-aerosol at a concentration of 2.4 ± 0.4 µg/m3 in a “nose only” inhalation setup for 4 h at a time, 5 times a week, during an overall period of 2 weeks to 6 months. Based on the majority of the effects assessed, this kind of exposure may be considered as close to LOAEL (lowest observed adverse effect level), or even to NOAEL (no observed adverse effect level). At the same time, the experiment revealed genotoxic and allergic effects as early as in the first weeks of exposure, suggesting that these effects may have no threshold at all.

Publisher

MDPI AG

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis

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