The assessment of the toxicity of nanocomplexes containing gadolinium orthovanadate nanoparticles and cholesterol

Home/2021, Vol. 9, No. 1/The assessment of the toxicity of nanocomplexes containing gadolinium orthovanadate nanoparticles and cholesterol

Cell and Organ Transplantology. 2021; 9(1):44-52.
DOI: 10.22494/cot.v9i1.121

The assessment of the toxicity of nanocomplexes containing gadolinium orthovanadate nanoparticles and cholesterol

Goltsev A.¹, Bondarovych M.¹, Babenko N.¹, Gaevska Yu.¹, Ostankova L.¹, Ostankov M.¹, Volkova N.¹, Klochkov V.²

  • ¹Institute for Problems of Cryobiology and Сryomedicine, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
  • ²Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Kharkiv, Ukraine

Abstract

Nanocomplexes (NCs) synthesized at the Institute for Scintillation Materials of the National Academy of Sciences of Ukraine, consisting of nanoparticles (NPs) of gadolinium orthovanadate and cholesterol, are promising compounds that can be used as probes and fluorescent labels for tumor cells or experimental oncopathology treatment. However, the biosafety of such substances remains unclear.
The purpose of the study was to evaluate the acute toxic effect of nanocomplexes on the healthy mice.
Materials and methods. Nanocomplexes containing nanoparticles of GdYVO4:Eu3+ and cholesterol in 5 % glucose solution were administered to BALB/c mice once intraperitoneally in volumes of 0.1 mL, 0.5 mL, 1 mL, 2 mL, which corresponds to 5.9-6, 5 mg, 29.5-32.5 mg, 59.1-65.0 mg, 118.2-130.0 mg/kg body weight. Control animals were injected with the same volumes of 5 % glucose solution. On the 14th day, the morphological characteristics of organs, the number of CD34+CD38 cells among bone marrow total nucleated cells, the activity of gamma-glutamyl transferase (GGT) and glucose-6-phosphate dehydrogenase (G6PD) in liver homogenates were determined.
Results. With the administration of NPs at a dose of less than 118.2 mg/kg body weight, no fatalities and symptoms of intoxication were showed, but there was a dose-dependent increase in the content of GGT in the liver of experimental animals. The use of NPs at a dose of 118.2-130.0 mg/kg body weight resulted in the death of 50 % of the animals on the 3rd day. In this group, on the 14th day, there were neoplasms in the spleen of one of the surviving animals, a decrease in the number of bone marrow total nucleated cell on the background of increased hematopoietic stem cells with CD34+CD38 phenotype, necrotic and dystrophic changes in the liver, and decreased activity of the G6PD enzyme.
Conclusions. The potential median lethal dose of gadolinium orthovanadate nanoparticles and cholesterol in nanocomplexes was determined, which was 118.2-130.0 mg/kg animal body weight, which allows to classify them as low-toxic substances.

Key words: nanoparticles; nanocomplexes; gadolinium orthovanadate; median lethal dose

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Goltsev A, Bondarovych M, Babenko N, Ostankova L, Ostankov M, Volkova N, Klochkov V. The assessment of the toxicity of nanocomplexes containing gadolinium orthovanadate nanoparticles and cholesterol. Cell Organ Transpl. 2021; 9(1):44-52. doi:10.22494/cot.v9i1.121

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