In vitro and in vivo toxicity of carbon dots with different chemical compositions

Halyna Kuznietsova (1) , Alain Géloën (2) , Nataliia Dziubenko (1) , Alexander Zaderko (1) , Sergei Alekseev (1) , Vladimir Lysenko (3) , Valeriy Skryshevsky (1)

1 Taras Shevchenko National University of Kyiv
2 LEM - Laboratoire d'Ecologie Microbienne - UMR 5557
3 iLM - FENNEC - iLM - Formation, élaboration de nanomatériaux et cristaux

Abstract Carbon dots (CDs) are easy-obtained nanoparticles with wide range of biological activity; however, their toxicity after prolonged exposure is poorly investigated. So, in vitro and in vivo toxicity of CDs with the surfaces enriched with hydroxylated hydrocarbon chains and methylene groups (CD_GE), carboxyl and phenol groups accompanied with nitrogen (CD_3011), trifluoromethyl (CDF19) or toluidine and aniline groups (CDN19) were aimed to be discovered. CDs’ in vitro toxicity was assessed on A549 cells (real-time cell analysis of impedance, fluorescence microscopy) after 24 h of incubation, and we observed no changes in cell viability and morphology. CDs’ in vivo toxicity was assessed on C57Bl6 mice after multiple dosages (5 mg/kg subcutaneously) for 14 days. Lethality (up to 50%) was observed in CDN19 and CD_3011 groups on different days of dosing, accompanied by toxicity signs in case of CD_3011. There were no changes in serum biochemical parameters except Urea (increased in CDF19 and CD_3011 groups), nor substantial kidney, liver, and spleen injuries. The most impactful for all organs were also CD_3011 and CDF19, causing renal tubule injury and liver blood supply violation. Thus, CDs with a surface enriched with oxygen- and nitrogen-containing functional groups might be toxic after multiple everyday dosing, without, however, significant damages of internal organs in survived animals.

Mots clés: Carbon dots; ethylenediamine; Carboxyl; Phenol; Trifluoromethyl; Aniline; Toluidine remains; A549 cells; C57Bl6 mice

Domaines: Toxicologie

Halyna Kuznietsova, Alain Géloën, Nataliia Dziubenko, Alexander Zaderko, Sergei Alekseev, et al.. In vitro and in vivo toxicity of carbon dots with different chemical compositions. Discover Nano, 2023, 18 (1), pp.111. ⟨10.1186/s11671-023-03891-9⟩. ⟨hal-04208979⟩