Features of bioaccumulation and toxic effects of copper (II) oxide nanoparticles under repeated inhalation exposure in rats

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Abstract

Introduction. Active use in various spheres of economic activity, large-scale production and the availability of data on toxicity determine the relevance of studying the effects of copper (II) oxide nanoparticles (CuO NPs) on the body during inhalation exposure.

Material and Methods. The size, surface area, and pore volume of CuO NPs were determined. The study and assessment of biochemical and hematological parameters of blood, the degree of bioaccumulation of nanomaterial, pathomorphological changes in organs of rats exposed to CuO NPs were carried out. The studies were carried out in comparison with a microsized analogue (CuO MPs).

Results. The size of CuO NPs in the composition of the native powder is 305.00 times less than that of CuO MPs. The surface area and pore volume are 9.61 and 9.33 times larger, respectively. After exposure to CuO NPs in the blood of rats relative to the control, the levels of activity of ALT, AST, ALP, GGT, LDH, amylase, AOA, MDA and the concentration of CRP increased by 1.49-2.23 times, the content of urea decreased by 1.41 times; relative number of eosinophils, leukocyte count, RDW by 1.31-5.39 times increased, relative number of segmented neutrophils decreased by 1.37 and monocytes by 1.42 times. The effect of NPs, in comparison with MPs, is more pronounced in increasing the activity of ALT, AST, LDH, MDA and the concentration of CRP by 1.25-1.68 times and in reducing the concentration of urea by 1.21 times; in increase the relative number of eosinophils by 2.37 and the count of leukocytes by 1.61 times. The concentration of copper under the action of NPs increases relative to the control in the lungs, liver, stomach, intestines and kidneys by 1.59-6.99 times. The degree of bioaccumulation of nanoparticles is 1.20-2.12 times higher than that of microparticles in the lungs, liver, stomach, and kidneys.

Conclusion. Functional and pathomorphological changes caused by CuO NPs are more pronounced in the lungs, stomach, and small intestine in comparison with microparticles. It was confirmed that the studied CuO particles are nanomaterials. They have a more pronounced bioaccumulation and toxic effect relative to the microdispersed analogue.

Contribution:

Zaitseva N.V. — the concept and design of the study, statistical processing of the material, editing;

Zemlyanova M.A. — the concept and design of the study, processing of the material, writing the text;

Stepankov M.S. — collection of material, writing the text;

Ignatova A.M., Nikolaeva A.E. — processing of the material.

All authors are responsible for the integrity of all parts of the manuscript and approval of the manuscript final version.

Conflict of interest. The authors declare no conflict of interest.

Acknowledgement. The study had no sponsorship.

Received: July 7, 2021 / Accepted: September 28, 2021 / Published: October 31, 2021

About the authors

Nina V. Zaitseva

Federal Scientific Center for Medical and Preventive Health Risk Management Technologies

Author for correspondence.
Email: noemail@neicon.ru
ORCID iD: 0000-0003-2356-1145
Russian Federation

Marina A. Zemlyanova

Federal Scientific Center for Medical and Preventive Health Risk Management Technologies; Perm State National Research University; Perm National Research Polytechnic University

Email: zem@fcrisk.ru
ORCID iD: 0000-0002-8013-9613

MD, PhD, DSci., Professor, Head of Biochemical and Cytogenetic Diagnostic Techniques Department, Federal Scientific Center for Medical and Preventive Health Risk Management Technologies, Perm, 614045, Russian Federation.

e-mail: zem@fcrisk.ru

Russian Federation

Mark S. Stepankov

Federal Scientific Center for Medical and Preventive Health Risk Management Technologies; Perm State National Research University

Email: noemail@neicon.ru
ORCID iD: 0000-0002-7226-7682
Russian Federation

Anna M. Ignatova

Federal Scientific Center for Medical and Preventive Health Risk Management Technologies; Perm National Research Polytechnic University

Email: noemail@neicon.ru
ORCID iD: 0000-0001-9075-3257
Russian Federation

Alena E. Nikolaeva

Federal Scientific Center for Medical and Preventive Health Risk Management Technologies

Email: noemail@neicon.ru
ORCID iD: 0000-0003-3119-3477
Russian Federation

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