Nigrostriatal dopaminergic deficits and hypokinesia caused by inactivation of the familial Parkinsonism-linked gene DJ-1 - PubMed (original) (raw)

Comparative Study

. 2005 Feb 17;45(4):489-96.

doi: 10.1016/j.neuron.2005.01.041.

Antonio Pisani, Marian Haburcak, Timothy A Vortherms, Tohru Kitada, Cinzia Costa, Youren Tong, Giuseppina Martella, Anne Tscherter, Andrea Martins, Giorgio Bernardi, Bryan L Roth, Emmanuel N Pothos, Paolo Calabresi, Jie Shen

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Comparative Study

Nigrostriatal dopaminergic deficits and hypokinesia caused by inactivation of the familial Parkinsonism-linked gene DJ-1

Matthew S Goldberg et al. Neuron. 2005.

Free article

Abstract

The manifestations of Parkinson's disease are caused by reduced dopaminergic innervation of the striatum. Loss-of-function mutations in the DJ-1 gene cause early-onset familial parkinsonism. To investigate a possible role for DJ-1 in the dopaminergic system, we generated a mouse model bearing a germline disruption of DJ-1. Although DJ-1(-/-) mice had normal numbers of dopaminergic neurons in the substantia nigra, evoked dopamine overflow in the striatum was markedly reduced, primarily as a result of increased reuptake. Nigral neurons lacking DJ-1 were less sensitive to the inhibitory effects of D2 autoreceptor stimulation. Corticostriatal long-term potentiation was normal in medium spiny neurons of DJ-1(-/-) mice, but long-term depression (LTD) was absent. The LTD deficit was reversed by treatment with D2 but not D1 receptor agonists. Furthermore, DJ-1(-/-) mice displayed hypoactivity in the open field. Collectively, our findings suggest an essential role for DJ-1 in dopaminergic physiology and D2 receptor-mediated functions.

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