Hyperactivation of midbrain dopaminergic system in schizophrenia could be attributed to the down-regulation of dysbindin.

Abstract:

:Extraordinal activation of nigrostriatal and mesolimbic dopaminergic systems (midbrain dopaminergic system) is thought to be one of the most important etiologies for schizophrenia, though the reason why unusual hyperactivation of the dopaminergic system occurs in the schizophrenic brain is quite obscure. Dysbindin, one of the most susceptible genes for schizophrenia, has been reported to be reduced in the schizophrenic brain. In situ hybridization analysis showed the mRNA expression of dysbindin in the mouse substantia nigra. Furthermore, suppression of dysbindin expression in PC12 cells resulted in an increase of the expression of SNAP25, which plays an important role in neurotransmitter release, and increased the release of dopamine. On the other hand, up-regulation of dysbindin expression in PC12 cells showed a tendency to decrease the expression of SNAP25. These data suggest that dysbindin might regulate the dopamine release of the dopaminergic system via modulation of the expression of SNAP25.

authors

Kumamoto N,Matsuzaki S,Inoue K,Hattori T,Shimizu S,Hashimoto R,Yamatodani A,Katayama T,Tohyama M

doi

10.1016/j.bbrc.2006.04.163

subject

Has Abstract

pub_date

2006-06-30 00:00:00

pages

904-9

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(06)00985-5

journal_volume

345

pub_type

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