In order to investigate the joint role of LRRK2 and SYT10 in PD etiology experimentally, SYT10 gene expression was measured at days 70 (d70) and 90 (d90) of the differentiation of induced pluripotent stem cells (iPSCs) from four PD patients heterozygous for LRRK2 mutation p.G2019S (G2019S + /PD + ), three unaffected carriers (G2019S + /PD-) and three controls (G2019S-/PD-). The gene discussed is SYT10; the disease is Parkinson disease.