A Swedish family with de novo alpha-synuclein A53T mutation: evidence for early cortical dysfunction

Andreas Puschmann, Owen A Ross, Carles Vilariño-Güell, Sarah J Lincoln, Jennifer M Kachergus, Stephanie A Cobb, Suzanne G Lindquist, Jørgen E Nielsen, Zbigniew K Wszolek, Matthew Farrer, Håkan Widner, Danielle van Westen, Douglas Hägerström, Katerina Markopoulou, Bruce A Chase, Karin Nilsson, Jan Reimer, Christer Nilsson

Abstract

A de novo alpha-synuclein A53T (p.Ala53 Th; c.209G > A) mutation has been identified in a Swedish family with autosomal dominant Parkinson's disease (PD). Two affected individuals had early-onset (before 31 and 40 years), severe levodopa-responsive PD with prominent dysphasia, dysarthria, and cognitive decline. Longitudinal clinical follow-up, EEG, SPECT and CSF biomarker examinations suggested an underlying encephalopathy with cortical involvement. The mutated allele (c.209A) was present within a haplotype different from that shared among mutation carriers in the Italian (Contursi) and the Greek-American Family H kindreds. One unaffected family member carried the mutation haplotype without the c.209A mutation, strongly suggesting its de novo occurrence within this family. Furthermore, a novel mutation c.488G > A (p.Arg163His; R163H) in the presenilin-2 (PSEN2) gene was detected, but was not associated with disease state.

OriginalsprogEngelsk
TidsskriftParkinsonism & related disorders
Vol/bind15
Udgave nummer9
Sider (fra-til)627-32
Antal sider6
ISSN1353-8020
DOI
StatusUdgivet - nov. 2009
Udgivet eksterntJa

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