Functionalized fullerene materials (fullerol nanoparticles) reduce brain injuries during cerebral ischemia-reperfusion in rat

Document Type: Original Article

Authors

1 Department of Nanotechnology, School of New Sciences and Technology, Islamic Azad University of Pharmaceutical Sciences Branch, Tehran, Iran

2 Department of Physiology and Biophysics, School of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran

Abstract

Aim: Oxidative stress plays a crucial role in the pathophysiology of ischemic stroke. Since water-soluble
fullerene derivatives act as the potent scavenger of oxygen free radicals in biological systems, we aimed
to investigate the possible protective effects of fullerol nanoparticles on brain infarction and edema in
transient model of focal cerebral ischemia in rat.
Materials & Methods: Experiment was performed by three groups of rats (each group; n=8): sham,
control ischemia (IR) and ischemia treated rats with fullerol. Brain ischemia was induced by 90 min
middle cerebral artery occlusion (MCAO) followed by 24 hours reperfusion. Treated rats received
fullerol at dose of 1 mg/kg 30 min before induction of MCAO. The brains were processed for histochemical
triphenyltetrazolium chloride (TTC) staining and quantitation of the ischemic infarct. Finally, the
brain hemispheres were weighed as an index of brain edema.
Results: MCAO induced brain infarction in large areas of cortex (261± 23 mm3) and subcortex (138±
23 mm3). Treatment with fullerol significantly reduced the infarct volume both in cortex and subcortex
by 64.75% and 52.17%, respectively. Induction of MCAO significantly increased the weights of right
hemispheres in IR group (0.77± 0.01 g) compared with sham rats (0.59± 0.01 g). Treatment with
fullerol decreased the weights of ischemic hemispheres in IR treated group (0.69± 0.03 g) compared to
IR non-treated rats.
Conclusion: Our findings indicate that fullerol nanoparticles are able to reduce the ischemia-induced
brain injury and edema possibly through their scavenging properties.

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