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Parkinson’s Disease
Volume 2011 (2011), Article ID 612989, 14 pages
http://dx.doi.org/10.4061/2011/612989
Research Article

Manganese Inhalation as a Parkinson Disease Model

Laboratorio de Neuromorfologia, Facultad de Estudios Superiores Iztacala, UNAM, Avenida de los Barrios 1, Los Reyes Iztacala, 54090 Tlalnepantla, Edo Mex, Mexico

Received 16 September 2010; Accepted 13 October 2010

Academic Editor: Yuzuru Imai

Copyright © 2011 José Luis Ordoñez-Librado et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The present study examines the effects of divalent and trivalent Manganese (Mn2+/Mn3+) mixture inhalation on mice to obtain a novel animal model of Parkinson disease (PD) inducing bilateral and progressive dopaminergic cell death, correlate those alterations with motor disturbances, and determine whether L-DOPA treatment improves the behavior, to ensure that the alterations are of dopaminergic origin. CD-1 male mice inhaled a mixture of Manganese chloride and Manganese acetate, one hour twice a week for five months. Before Mn exposure, animals were trained to perform motor function tests and were evaluated each week after the exposure. By the end of Mn exposure, 10 mice were orally treated with 7.5 mg/kg L-DOPA. After 5 months of Mn mixture inhalation, striatal dopamine content decreased 71%, the SNc showed important reduction in the number of TH-immunopositive neurons, mice developed akinesia, postural instability, and action tremor; these motor alterations were reverted with L-DOPA treatment. Our data provide evidence that Mn2+/Mn3+ mixture inhalation produces similar morphological, neurochemical, and behavioral alterations to those observed in PD providing a useful experimental model for the study of this neurodegenerative disease.