Parkinsonism & related disorders · 2024
Clinical, neuroimaging and genetic findings in Brazilian patients with neurodegeneration with brain iron accumulation.
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Araújo Salomão Rubens Paulo, Rezende Filho Flávio Moura, Borges Vanderci, Kurian Manju A, Ferraz Henrique Ballalai, Breedveld Guido J, Bonifati Vincenzo, Barsottini Orlando G, Pedroso José Luiz
Аннотация
Neurodegeneration with brain iron accumulation (NBIA) encompasses a clinically and genetically heterogeneous group of rare disorders. Here, we report clinical, neuroimaging and genetic studies in twenty three Brazilian NBIA patients. In thirteen subjects, deleterious variants were detected in known NBIA-causing genes (PANK2, PLA2G6, C9ORF12, WDR45 and FA2H), including previously unreported variants in PANK2 and PLA2G6. Two patients carried rare, likely pathogenic variants in genes not previously associated with NBIA: KMT2A c.11785A > C (p.Ile3929Leu), and TIMM8A c.127T > C (p.Cys43Arg), suggesting an expansion of their associated phenotypes to include NBIA. In eight patients the etiology remains unsolved, suggesting variants undetectable by the adopted methods, or the existence of additional NBIA-causing genes.