C9ORF72 G4C2-repeat expansion and frontotemporal dementia first reported case in Argentina

FERNANDEZ SUAREZ MARCOS; SURACE EZEQUIEL; HARRIS PAULA; TAPAJOZ FERNANDA; SEVLEVER GUSTAVO; ALLEGRI RICARDO FRANCISCO; RUSSO GRISELDA

NEUROCASE

ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD

Lugar: Londres; Año: 2016 vol. 22 p. 281 - 284

1355-4794

We present a female patient aged 51 who developed behavioral disorders followed by cognitive impairment over 3 years. Neuropsychological, neuropsychiatric, and radiological features suggested a probable behavioral variant of frontotemporal dementia (bvFTD). A family history of amyotrophic lateral sclerosis and parkinsonism suggested the hexanucleotide repeat expansion G4C2 in C9ORF72 . We set up a two-step genotyping algorithm for the detection of the expansion using fragment-length analysis polymerase chain reaction (PCR) and repeat-primed PCR with fluorescent primers. We confirmed the presence of an expanded G4C2 allele in the patient. This represents the first documented case of bvFTD due to a C9ORF72 expansion in Argentina.