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The DISC1 promoter: Characterization and regulation by FOXP2

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons32809

Derizioti,  Pelagia
Language and Genetics Department, MPI for Psycholinguistics, Max Planck Society;
Wellcome Trust Centre for Human Genetics, University of Oxford;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons37905

Vernes,  Sonja C.
Language and Genetics Department, MPI for Psycholinguistics, Max Planck Society;
Donders Institute for Brain, Cognition and Behaviour, External Organizations;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons4427

Fisher,  Simon E.
Language and Genetics Department, MPI for Psycholinguistics, Max Planck Society;
Wellcome Trust Centre for Human Genetics, University of Oxford;
Donders Institute for Brain, Cognition and Behaviour, External Organizations;

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Walker_et_al_Hum_Mol_Gen_2012.pdf
(Verlagsversion), 434KB

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Zitation

Walker, R. M., Hill, A. E., Newman, A. C., Hamilton, G., Torrance, H. S., Anderson, S. M., et al. (2012). The DISC1 promoter: Characterization and regulation by FOXP2. Human Molecular Genetics, 21, 2862-2872. doi:10.1093/hmg/dds111.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-51B9-E
Zusammenfassung
Disrupted in schizophrenia 1 (DISC1) is a leading candidate susceptibility gene for schizophrenia, bipolar disorder, and recurrent major depression, which has been implicated in other psychiatric illnesses of neurodevelopmental origin, including autism. DISC1 was initially identified at the breakpoint of a balanced chromosomal translocation, t(1;11) (q42.1;14.3), in a family with a high incidence of psychiatric illness. Carriers of the translocation show a 50% reduction in DISC1 protein levels, suggesting altered DISC1 expression as a pathogenic mechanism in psychiatric illness. Altered DISC1 expression in the post-mortem brains of individuals with psychiatric illness and the frequent implication of non-coding regions of the gene by association analysis further support this assertion. Here, we provide the first characterisation of the DISC1 promoter region. Using dual luciferase assays, we demonstrate that a region -300bp to -177bp relative to the transcription start site (TSS) contributes positively to DISC1 promoter activity, whilst a region -982bp to -301bp relative to the TSS confers a repressive effect. We further demonstrate inhibition of DISC1 promoter activity and protein expression by FOXP2, a transcription factor implicated in speech and language function. This inhibition is diminished by two distinct FOXP2 point mutations, R553H and R328X, which were previously found in families affected by developmental verbal dyspraxia (DVD). Our work identifies an intriguing mechanistic link between neurodevelopmental disorders that have traditionally been viewed as diagnostically distinct but which do share varying degrees of phenotypic overlap.