Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection

Ajay Pal,1 Anand Singh,2 Tapas C Nag,3 Parthaprasad Chattopadhyay,2 Rashmi Mathur,1 Suman Jain1 1Department of Physiology, 2Department of Biochemistry, 3Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India Background: Iron oxide nanoparticles (IONPs) can attenuate oxidati...

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Autores principales:	Pal A, Singh A, Nag TC, Chattopadhyay P, Mathur R, Jain S
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2013
Materias:	Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/d0ef489c7434467db8e2768cf542153d
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spelling	oai:doaj.org-article:d0ef489c7434467db8e2768cf542153d2021-12-02T02:42:09ZIron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection1176-91141178-2013https://doaj.org/article/d0ef489c7434467db8e2768cf542153d2013-06-01T00:00:00Zhttp://www.dovepress.com/iron-oxide-nanoparticles-and-magnetic-field-exposure-promote-functiona-a13428https://doaj.org/toc/1176-9114https://doaj.org/toc/1178-2013Ajay Pal,1 Anand Singh,2 Tapas C Nag,3 Parthaprasad Chattopadhyay,2 Rashmi Mathur,1 Suman Jain1 1Department of Physiology, 2Department of Biochemistry, 3Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India Background: Iron oxide nanoparticles (IONPs) can attenuate oxidative stress in a neutral pH environment in vitro. In combination with an external electromagnetic field, they can also facilitate axon regeneration. The present study demonstrates the in vivo potential of IONPs to recover functional deficits in rats with complete spinal cord injury. Methods: The spinal cord was completely transected at the T11 vertebra in male albino Wistar rats. Iron oxide nanoparticle solution (25 µg/mL) embedded in 3% agarose gel was implanted at the site of transection, which was subsequently exposed to an electromagnetic field (50 Hz, 17.96 µT for two hours daily for five weeks). Results: Locomotor and sensorimotor assessment as well as histological analysis demonstrated significant functional recovery and a reduction in lesion volume in rats with IONP implantation and exposure to an electromagnetic field. No collagenous scar was observed and IONPs were localized intracellularly in the immediate vicinity of the lesion. Further, in vitro experiments to explore the cytotoxic effects of IONPs showed no effect on cell survival. However, a significant decrease in H2O2-mediated oxidative stress was evident in the medium containing IONPs, indicating their free radical scavenging properties. Conclusion: These novel findings indicate a therapeutic role for IONPs in spinal cord injury and other neurodegenerative disorders mediated by reactive oxygen species. Keywords: secondary damage, oxidative stress, electromagnetic field, cytotoxicity, neurodegeneration, painPal ASingh ANag TCChattopadhyay PMathur RJain SDove Medical PressarticleMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol 2013, Iss default, Pp 2259-2272 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine (General) R5-920
spellingShingle	Medicine (General) R5-920 Pal A Singh A Nag TC Chattopadhyay P Mathur R Jain S Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
description	Ajay Pal,1 Anand Singh,2 Tapas C Nag,3 Parthaprasad Chattopadhyay,2 Rashmi Mathur,1 Suman Jain1 1Department of Physiology, 2Department of Biochemistry, 3Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India Background: Iron oxide nanoparticles (IONPs) can attenuate oxidative stress in a neutral pH environment in vitro. In combination with an external electromagnetic field, they can also facilitate axon regeneration. The present study demonstrates the in vivo potential of IONPs to recover functional deficits in rats with complete spinal cord injury. Methods: The spinal cord was completely transected at the T11 vertebra in male albino Wistar rats. Iron oxide nanoparticle solution (25 µg/mL) embedded in 3% agarose gel was implanted at the site of transection, which was subsequently exposed to an electromagnetic field (50 Hz, 17.96 µT for two hours daily for five weeks). Results: Locomotor and sensorimotor assessment as well as histological analysis demonstrated significant functional recovery and a reduction in lesion volume in rats with IONP implantation and exposure to an electromagnetic field. No collagenous scar was observed and IONPs were localized intracellularly in the immediate vicinity of the lesion. Further, in vitro experiments to explore the cytotoxic effects of IONPs showed no effect on cell survival. However, a significant decrease in H2O2-mediated oxidative stress was evident in the medium containing IONPs, indicating their free radical scavenging properties. Conclusion: These novel findings indicate a therapeutic role for IONPs in spinal cord injury and other neurodegenerative disorders mediated by reactive oxygen species. Keywords: secondary damage, oxidative stress, electromagnetic field, cytotoxicity, neurodegeneration, pain
format	article
author	Pal A Singh A Nag TC Chattopadhyay P Mathur R Jain S
author_facet	Pal A Singh A Nag TC Chattopadhyay P Mathur R Jain S
author_sort	Pal A
title	Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
title_short	Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
title_full	Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
title_fullStr	Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
title_full_unstemmed	Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
title_sort	iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection
publisher	Dove Medical Press
publishDate	2013
url	https://doaj.org/article/d0ef489c7434467db8e2768cf542153d
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_version_	1718402251790221312

Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection

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