title: Expression profiling in peripheral blood reveals signature for penetrance in DYT1 dystonia.
abstract: DYT1 dystonia is an autosomal-dominantly inherited movement disorder, which is usually caused by a GAG deletion in the TOR1A gene. Due to the reduced penetrance of approximately 30-40%, the determination of the mutation in a subject is of limited use with regard to actual manifestation of symptoms. In the present study, we used Affymetrix oligonucleotide microarrays to analyze global gene expression in blood samples of 15 manifesting and 15 non-manifesting mutation carriers in order to identify a susceptibility profile beyond the GAG deletion which is associated with the manifestation of symptoms in DYT1 dystonia. We identified a genetic signature which distinguished between asymptomatic mutation carriers and symptomatic DYT1 patients with 86.7% sensitivity and 100% specificity. This genetic signature could correctly predict the disease state in an independent test set with a sensitivity of 87.5% and a specificity of 85.7%. Conclusively, this genetic signature might provide a possibility to distinguish DYT1 patients from asymptomatic mutation carriers.
authors.affiliation: Department of Medical Genetics, Institute of Human Genetics, University of Tuebingen, Tuebingen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Walter
authors.forename: M
authors.initials: M
authors.lastname: Bonin
authors.forename: R Saunders
authors.initials: RS
authors.lastname: Pullman
authors.forename: E M
authors.initials: EM
authors.lastname: Valente
authors.forename: M
authors.initials: M
authors.lastname: Loi
authors.forename: M
authors.initials: M
authors.lastname: Gambarin
authors.forename: D
authors.initials: D
authors.lastname: Raymond
authors.forename: M
authors.initials: M
authors.lastname: Tinazzi
authors.forename: C
authors.initials: C
authors.lastname: Kamm
authors.forename: N
authors.initials: N
authors.lastname: Glöckle
authors.forename: S
authors.initials: S
authors.lastname: Poths
authors.forename: T
authors.initials: T
authors.lastname: Gasser
authors.forename: S B
authors.initials: SB
authors.lastname: Bressman
authors.forename: C
authors.initials: C
authors.lastname: Klein
authors.forename: L J
authors.initials: LJ
authors.lastname: Ozelius
authors.forename: O
authors.initials: O
authors.lastname: Riess
authors.forename: K
authors.initials: K
authors.lastname: Grundmann
mesh_terms: D000328:Adult; D004422:Dystonia Musculorum Deformans / Q000235:genetics*; D005260:Female; D020869:Gene Expression Profiling; D020022:Genetic Predisposition to Disease; D005820:Genetic Testing; D006801:Humans; D008297:Male; D008875:Middle Aged; D018832:Molecular Chaperones / Q000235:genetics*; D009154:Mutation; D020411:Oligonucleotide Array Sequence Analysis; D019683:Penetrance; D018911:Trinucleotide Repeats
chemical_list: D018832:Molecular Chaperones; C108175:TOR1A protein, human