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

Benzodiazepine receptor binding in cerebellar cortex: observations in olivopontocerebellar atrophy.

Benzodiazepine receptor binding was measured in cerebellar cortex of 15 patients with dominantly inherited olivopontocerebellar atrophy (OPCA). The majority of these patients had a moderate to marked Purkinje cell loss, as judged by the lowered levels of dentate nucleus gamma-aminobutyric acid (GABA), a marker of Purkinje cells. Despite the reduction in Purkinje cell number cerebellar cortical benzodiazepine receptor density was either normal or slightly elevated in the OPCA patients. These results are in contrast to the findings in a mutant strain of mice deficient in Purkinje cells in which the concentration of benzodiazepine receptors in cerebellum is greatly reduced. Our data indicate that in the human, cerebellar cortical benzodiazepine receptors are either not significantly associated with Purkinje cells or that in OPCA Purkinje cell loss triggers a de novo synthesis of extra benzodiazepine binding sites. It is concluded that, in contrast with the rodent, in the human benzodiazepine receptor binding may not serve as a marker for cerebellar Purkinje cells.[1]

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