Analysis of Toxicity Biomarkers of Fullerene C60 Nanoparticles by Confocal Fluorescent Microscopy

The methods of laser confocal microscopy were employed to study the changes in rat target organs (iliac mucosa and liver) provoked by peroral administration of dispersion of nanosized (31 nm) multimolecular fullerene C60 particles in doses of 0.1, 1.0, and 10 mg/kg body weight over 92 days. The micropreparations were selectively stained with fluorescent dyes to mark the cell nuclei (DAPI), actin microfilaments (fluorescently labeled phalloidin), and the membrane proteins CD106, CD31, and claudins in tight junctions (fluorescently labeled monoclonal antibodies). In rats treated with fullerene in the examined doses, the iliac mucosa demonstrated normal morphology of the villi. There were no signs of inflammation and no alterations in the actin fi laments of cytoskeleton and in enterocytic tight junctions. The count of CD106+ and CD31+ cells did not change. The highest examined doses of fullerene (1 and 10 mg/kg body weight) increased population and modified distribution of hepatic CD106+ cells. They also resulted in accumulation of cytoplasmic granules presumably identified as Kupffer macrophages without any signs of visible inflammation or necrotic areas. This phenomenon can reflect the early stages of toxic reaction being a sensitive bioindicator of the damage produced by administered fullerene C60 in the hepatic tissue.

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Correspondence to I. V. Gmoshinskii.

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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 158, No. 10, pp. 440-447, October 2014

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Shipelin, V.A., Smirnova, T.A., Gmoshinskii, I.V. et al. Analysis of Toxicity Biomarkers of Fullerene C60 Nanoparticles by Confocal Fluorescent Microscopy. Bull Exp Biol Med 158, 443–449 (2015). https://doi.org/10.1007/s10517-015-2781-4

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Key Words

  • fullerene
  • toxicity
  • ileum
  • liver
  • confocal microscopy