This is the first molecular study in Brazilian index cases from families with ADPD.
We screened specific mutations in LRRK2, SNCA, VPS35 and GBA genes.
Heterozygous mutations in LRRK2 and GBA genes were found in 7.0% of the index cases.
Our data reveal a substantial contribution of LRRK2 and GBA mutations to PD in Brazil.
Our findings show that VPS35 and SNCA mutations are uncommon causes of PD in Brazil.