Authors: Yamada, Takashi; Nakaoka, Ryusuke; Sawada, Rumi; Matsuoka, Atsuko; Tsuchiya, Toshie

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 1, January 2010 , pp. 604-611(8)

Publisher: American Scientific Publishers

Abstract:

Fullerenes are condensed ring aromatic compounds with extended π systems; they have unique cage structures. Current studies suggest that several fullerene derivatives have neuroprotective effects, and it is expected that fullerenes will be useful in drug delivery system and novel medical devices targeting the brain. However, little is known about the effects of fullerenes and its derivative on brain function. We examined the effect of fullerene(OH)₂₄ on the central nervous system in this study. In a V79 colony assay, the IC₅₀ of fullerene(OH)₂₄ was 1.74 μg/ml. In an MTT assay, fullerene(OH)₂₄ reduced proliferation of normal human astrocytes obviously. In an vivo study, 0.25 mg/kg⁻¹ of fullerene(OH)₂₄ was injected into the lateral ventricle of rat brains. The intracerebral injection of fullerene(OH)₂₄ remarkably decreased body weight and locomotor behavior of rats on day 1, but drastically increased locomotor behavior on day 7. The intracerebral injection of fullerene(OH)₂₄ changed the monoamine concentration greatly on day 1 and slightly on day 30 after the injection. These results suggest that intracerebral injection of fullerene(OH)₂₄ had strong and acute effects on the central nervous system, but that the effects were not permanent. In conclusion, we suggest that fullerene's derivative, fullerene(OH)₂₄ had toxic effects on brain cells and that intracerebral injection of fullerene(OH)₂₄ had acute harmful effects on brain monoamines neurotransmission and locomotor activity.

Keywords: NANOMATERIALS; FULLERENE; MONOAMINE; LOCOMOTOR ACTIVITY; NEUROTOXICITY

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2010.1720

Publication date: 2010-01-01

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• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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