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| Artigalás,Osvaldo; Paskulin,Giorgio; Riegel,Mariluce; Burin,Maira; Saraiva-Pereira,Maria Luiza; Maluf,Sharbel; Kiss,Andrea; Schwartz,Ida Vanessa D.. |
| A 10-year-old speechless, mentally deficient male, with low arylsulfatase A (ARSA) activity, and presumably, methachromatic leukodystrophy, underwent genetic evaluation. As the clinical picture was not compatible with this diagnosisan ARSA gene and chromosome analysis were performed, showing the presence of a pseudodeficiency ARSA allele and a de novo apparently balanced t(16;22)(p11.2;q13) translocation. A deletion on the long arm of chromosome 22 encompassing the ARSA gene, as shown by FISH and array-CGH, indicated a 22q13 deletion syndrome. This case illustrates the importance of detailed cytogenetic investigation in patients presenting low arylsulfatase A activity and atypical/unspecific clinical features. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 22q13 deletion; Apparently balanced translocation; ARSA gene; Arylsulfatase A pseudodeficiency; Metachromatic leukodystrophy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300007 |
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| Castilhos,Raphael Machado de; Santos,José Augusto dos; Augustin,Marina Coutinho; Pedroso,José Luiz; Barsottini,Orlando; Saba,Roberta; Ferraz,Henrique Ballalai; Godeiro Junior,Clécio; Vargas,Fernando Regla; Salarini,Diego Zanotti; Furtado,Gabriel Vasata; Polese-Bonatto,Marcia; Rodrigues,Luiza Paulsen; Sena,Lucas Schenatto; Saraiva-Pereira,Maria Luiza; Jardim,Laura Bannach. |
| Abstract Huntington’s disease (HD) is due to dominant expansions of the CAG repeat of the HTT gene. Meiotic instability of the (CAG)n might impact the disorder frequency. We report on HD minimal prevalence in Rio Grande do Sul (RS) state, Brazil, and on intergenerational instability of the (CAG)n in HD families. Symptomatic and at-risk subjects from 179 HD families were ascertained between 2013 and 2016. Clinical, molecular and family history data were obtained. Expanded (CAG)n length differences between parent and child (delta-expanded-(CAG)n) were calculated. Effect of parental age on the (CAG)n instability upon transmission was inferred by correlating delta-expanded-(CAG)n between siblings to their age differences. HD minimal prevalence in RS state was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CAG expansion; Huntington’s disease; Intergenerational instability; Minimal prevalence. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000300329 |
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| Giugliani,Roberto; Bender,Fernanda; Couto,Rowena; Bochernitsan,Aline; Brusius-Facchin,Ana Carolina; Burin,Maira; Amorim,Tatiana; Acosta,Angelina Xavier; Purificação,Antônio; Leistner-Segal,Sandra; Saraiva-Pereira,Maria Luiza; Jardim,Laura Bannach; Matte,Ursula; Riegel,Mariluce; Cardoso-dos-Santos,Augusto César; Rodrigues,Graziella; Oliveira,Marcelo Zagonel de; Tagliani-Ribeiro,Alice; Heck,Selia; Dresch,Vanusa; Schuler-Faccini,Lavínia; Kubaski,Francyne. |
| Abstract Rare genetic disorders are currently in the spotlight due to the elevated number of different conditions and significant total number of affected patients. The study of these disorders is extremely helpful for the elucidation of physiological processes related with complex disorders. Isolated populations are instrumental for the study of genetic disorders, considering their homogeneity and high proportion of affected patients in a small geographic area. These favorable conditions lead to the creation of a new discipline, known as “population medical genetics”, which integrates medical genetics, population genetics, epidemiological genetics and community genetics. In order to develop practical activities in this new discipline, the National... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Population Medical Genetics; Genetic clusters; Founder effect; Population isolates. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000200312 |
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| Málaga,Diana Rojas; Brusius-Facchin,Ana Carolina; Siebert,Marina; Pasqualim,Gabriela; Saraiva-Pereira,Maria Luiza; Souza,Carolina F.M de; Schwartz,Ida V.D.; Matte,Ursula; Giugliani,Roberto. |
| Abstract Lysosomal storage disorders (LSDs) constitute a heterogeneous group of approximately 50 genetic disorders. LSDs diagnosis is challenging due to variability in phenotype penetrance, similar clinical manifestations, and a high allelic heterogeneity. A powerful tool for the diagnosis of the disease could reduce the “diagnostic odyssey” for affected families, leading to an appropriate genetic counseling and a better outcome for current therapies, since enzyme replacement therapies have been approved in Brazil for Gaucher, Fabry, and Pompe diseases, and are under development for Niemann-Pick Type B. However, application of next-generation sequencing (NGS) technology in the clinical diagnostic setting requires a previous validation phase. Here, we... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ion Torrent; Molecular diagnostics; Next-generation sequencing; Lysosomal storage disorders; Validation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000200197 |
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| Furtado,Gabriel Vasata; Oliveira,Camila Maria de; Bolzan,Gabriela; Saute,Jonas Alex Morales; Saraiva-Pereira,Maria Luiza; Jardim,Laura Bannach. |
| Abstract Machado-Joseph disease (SCA3/MJD) is the most common spinocerebellar ataxia worldwide, and particularly so in Southern Brazil. Due to an expanded polyglutamine at ataxin-3, SCA3/MJD presents a relentless course with no current disease modifying treatment. Clinical scales used to measure SCA3/MJD progression present moderate effect sizes, a major drawback for their use as main outcomes in clinical trials, given the rarity and slow progression of the disease. This limitation might be overcome by finding good surrogate markers. We present here a review of studies on peripheral and neurophysiological markers in SCA3/MJD that can be candidates for state biomarkers. Data on markers already studied were summarized, giving emphasis on validation against... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomarkers; Neurophysiology; Machado-Joseph disease; Spinocerebellar ataxia type 3. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000200238 |
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