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Mutation screening of the DYT6/ THAP1 gene in Italy
Author(s) -
Bonetti Monica,
Barzaghi Chiara,
Brancati Francesco,
Ferraris Alessandro,
Bellacchio Emanuele,
Giovanetti Alessandro,
Ialongo Tamara,
Zorzi Giovanna,
Piano Carla,
Petracca Martina,
Albanese Alberto,
Nardocci Nardo,
Dallapiccola Bruno,
Bentivoglio Anna Rita,
Garavaglia Barbara,
Valente Enza Maria
Publication year - 2009
Publication title -
movement disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.352
H-Index - 198
eISSN - 1531-8257
pISSN - 0885-3185
DOI - 10.1002/mds.22861
Subject(s) - proband , missense mutation , genetics , exon , biology , gene , locus (genetics) , medicine , mutation
Mutations in the THAP1 gene on chromosome 8p21‐p22 (DYT6 locus) have been recently reported as causative of autosomal dominant primary torsion dystonia (PTD) in four Amish–Mennonite families and in 12 additional probands of different ancestry. We sequenced the THAP1 gene in 158 patients with DYT1 ‐negative PTD who had onset of symptoms below 30 years and/or positive family history. One sporadic Greek male patient, aged 57 years, was found to carry a novel heterozygous missense variant in THAP1 exon 3 (p.Cys170Arg), of likely pathogenic significance. This subject first presented with right writer's cramp at age of 10 years and, subsequently, developed left arm dystonia and an extremely severe left laterocollis, without further spreading to other body districts. Our findings expand the genotypic spectrum of THAP1 and strengthen the association with upper body involvement, including the cranial and cervical districts that are usually spared in DYT1‐PTD. © 2009 Movement Disorder Society