Should we investigate mitochondrial disorders in progressive adult-onset undetermined ataxias? View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2020-08-24

AUTHORS

José Luiz Pedroso, Wladimir Bocca Vieira de Rezende Pinto, Orlando Graziani Povoas Barsottini, Acary Souza Bulle Oliveira

ABSTRACT

BackgroundDespite the broad development of next-generation sequencing approaches recently, such as whole-exome sequencing, diagnostic workup of adult-onset progressive cerebellar ataxias without remarkable family history and with negative genetic panel testing for SCAs remains a complex and expensive clinical challenge.Case presentationIn this article, we report a Brazilian man with adult-onset slowly progressive pure cerebellar ataxia, which developed neuropathy and hearing loss after fifteen years of ataxia onset, in which a primary mitochondrial DNA defect (MERRF syndrome - myoclonus epilepsy with ragged-red fibers) was confirmed through muscle biopsy evaluation and whole-exome sequencing.ConclusionsMitochondrial disorders are a clinically and genetically complex and heterogenous group of metabolic diseases, resulting from pathogenic variants in the mitochondrial DNA or nuclear DNA. In our case, a correlation with histopathological changes identified on muscle biopsy helped to clarify the definitive diagnosis. Moreover, in neurodegenerative and neurogenetic disorders, some symptoms may be evinced later during disease course. We suggest that late-onset and adult pure undetermined ataxias should be considered and investigated for mitochondrial disorders, particularly MERRF syndrome and other primary mitochondrial DNA defects, together with other more commonly known nuclear genes. More... »

PAGES

13

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s40673-020-00122-0

DOI

http://dx.doi.org/10.1186/s40673-020-00122-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1130312876

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/32922825


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