Fullerene (C60) particle size implications in neurotoxicity following infusion into the hippocampi of Wistar rats

Ândrea Barbosa Kraemer, Gustavo Morrone Parfitt, Daiane da Silva Acosta, Gisele Eva Bruch, Marcos Freitas Cordeiro, Luis Fernando Marins, Juliane Ventura-Lima, José Maria Monserrat, Daniela Martí Barros

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The buckminsterfullerene (C60) is considered as a relevant candidate for drug and gene delivery to the brain, once it has the ability to cross the blood-brain barrier. However, the biological implications of this nanomaterial are not fully understood, and its safety for intracerebral delivery is still debatable. In this study, we investigated if C60 particle size could alter its biological effects. For this, two aqueous C60 suspensions were used with maximum particle size up to 200 nm and 450 nm. The suspensions were injected in the hippocampus, the main brain structure involved in memory processing and spatial localization. In order to assess spatial learning, male Wistar rats were tested in Morris water maze, and the hippocampal BDNF protein levels and gene expression were analyzed. Animals treated with C60 up to 450 nm demonstrated impaired spatial memory with a significant decrease in BDNF protein levels and gene expression. However, an enhanced antioxidant capacity was observed in both C60 treatments. A decrease in reactive oxygen species levels was observed in the treatments with suspensions containing particles measuring with up to 450 nm. Thiobarbituric acid reactive substances, glutamate cysteine ligase, and glutathione levels showed no alterations among the different treatments. In conclusion, different particle sizes of the same nanomaterial can lead to different behavioral outcomes and biochemical parameters in brain tissue.

Original languageEnglish
Pages (from-to)197-203
Number of pages7
JournalToxicology and Applied Pharmacology
Volume338
DOIs
StatePublished - 1 Jan 2018
Externally publishedYes

Keywords

  • Buckminsterfullerene
  • Hippocampus
  • Learning
  • Memory
  • Nanotechnology

Fingerprint

Dive into the research topics of 'Fullerene (C60) particle size implications in neurotoxicity following infusion into the hippocampi of Wistar rats'. Together they form a unique fingerprint.

Cite this