BACKGROUND AND PURPOSE: The relative frequency of the different autosomal dominant cerebellar ataxia (ADCA) varies widely amongst different geographic locations. Here we describe a series of 45 ADCA families from Portugal. METHODS: Patients with progressive cerebellar dysfunction of autosomal dominant transmission underwent a clinical examination protocol and genetic testing for spinocerebellar ataxia (SCA)1 to Machado-Joseph disease (MJD)/SCA3, SCA6, SCA7, SCA10, SCA12, SCA17 and dentatorubral-pallidoluysian atrophy (DRPLA). We registered the clinical characteristics and frequency of each type of ataxia. RESULTS: MJD/SCA3 was the most frequent ADCA (26 families, 57.8% of all families), followed by DRPLA (5 families, 11.2%), SCA7 (2 families, 4.4%), SCA2 and SCA1 (1 family each, 2.2% each); 10 families (22.2%) had no molecular diagnosis. SCA1 and SCA7 patients had African ancestry. DRPLA patients had Portuguese ancestry and were characterized by prominent anticipation and a variable combination of epilepsy, extra-pyramidal symptoms and dementia. Ophtalmoparesis, slow saccades and retinopathy were most distinctive of SCA3, SCA2 and SCA7 cases, respectively. CONCLUSIONS: MJD/SCA3 was the most common ADCA in this group of families. The high frequency of DRPLA and presence of SCA1 and SCA7 cases was unexpected. The presence of these rarer ADCA types probably reflects migration phenomena, posing a challenge for differential diagnosis.
BACKGROUND AND PURPOSE: The relative frequency of the different autosomal dominant cerebellar ataxia (ADCA) varies widely amongst different geographic locations. Here we describe a series of 45 ADCA families from Portugal. METHODS:Patients with progressive cerebellar dysfunction of autosomal dominant transmission underwent a clinical examination protocol and genetic testing for spinocerebellar ataxia (SCA)1 to Machado-Joseph disease (MJD)/SCA3, SCA6, SCA7, SCA10, SCA12, SCA17 and dentatorubral-pallidoluysian atrophy (DRPLA). We registered the clinical characteristics and frequency of each type of ataxia. RESULTS:MJD/SCA3 was the most frequent ADCA (26 families, 57.8% of all families), followed by DRPLA (5 families, 11.2%), SCA7 (2 families, 4.4%), SCA2 and SCA1 (1 family each, 2.2% each); 10 families (22.2%) had no molecular diagnosis. SCA1 and SCA7patients had African ancestry. DRPLApatients had Portuguese ancestry and were characterized by prominent anticipation and a variable combination of epilepsy, extra-pyramidal symptoms and dementia. Ophtalmoparesis, slow saccades and retinopathy were most distinctive of SCA3, SCA2 and SCA7 cases, respectively. CONCLUSIONS:MJD/SCA3 was the most common ADCA in this group of families. The high frequency of DRPLA and presence of SCA1 and SCA7 cases was unexpected. The presence of these rarer ADCA types probably reflects migration phenomena, posing a challenge for differential diagnosis.
Authors: Luis Velázquez-Pérez; Roberto Rodríguez-Labrada; Julio Cesar García-Rodríguez; Luis Enrique Almaguer-Mederos; Tania Cruz-Mariño; José Miguel Laffita-Mesa Journal: Cerebellum Date: 2011-06 Impact factor: 3.847
Authors: Giovana B Bampi; Rafael Bisso-Machado; Tábita Hünemeier; Tailise C Gheno; Gabriel V Furtado; Diego Veliz-Otani; Mario Cornejo-Olivas; Pillar Mazzeti; Maria Cátira Bortolini; Laura B Jardim; Maria Luiza Saraiva-Pereira Journal: Neuromolecular Med Date: 2017-09-13 Impact factor: 3.843
Authors: Raphael Machado de Castilhos; Gabriel Vasata Furtado; Tailise Conte Gheno; Paola Schaeffer; Aline Russo; Orlando Barsottini; José Luiz Pedroso; Diego Z Salarini; Fernando Regla Vargas; Maria Angélica de Faria Domingues de Lima; Clécio Godeiro; Luiz Carlos Santana-da-Silva; Maria Betânia Pereira Toralles; Silvana Santos; Hélio van der Linden; Hector Yuri Wanderley; Paula Frassineti Vanconcelos de Medeiros; Eliana Ternes Pereira; Erlane Ribeiro; Maria Luiza Saraiva-Pereira; Laura Bannach Jardim Journal: Cerebellum Date: 2014-02 Impact factor: 3.847