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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Acrylamide-induced depletion of microtubule-associated proteins (MAP1 and MAP2) in the rat extrapyramidal system.

Acrylamide, an occupational neurotoxicant, reduced MAP1 and MAP2 distribution in different regions of rat brain. Different components of the extrapyramidal system (caudate-putamen, globus pallidus, substantia nigra and red nucleus) revealed differential distribution of MAP1 and MAP2 in acrylamide-treated animals. Rats were treated with acrylamide (estimated mean dose: 15 mg/kg/day) for 2 weeks and MAP1 and MAP2 were localized according to Sternberger's peroxidase-anti-peroxidase technique. MAP1 labelled neuronal perikarya and dendrites almost with a similar intensity, but MAP2 immunostaining was more intense in dendrites than neuronal perikarya. Acrylamide caused a near-total loss of MAP1 and MAP2 immunoreactivity in caudate-putamen. Other components of the extrapyramidal system were relatively less affected by acrylamide. These results indicate that caudate-putamen is more susceptible to the action of acrylamide than other components of the extrapyramidal system studied. The depletion of MAP1 and MAP2 immunoreactivity by acrylamide appears to be an early biochemical event preceding peripheral neuropathy. The loss of MAPs immunoreactivity occurs first in dendrites and proceeds toward the perikarya. This study indicates that acrylamide not only causes axonal damage but may also induce dendritic degeneration.[1]


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