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- W2912022330 abstract "Individuals with GBA (glucocerebrosidase) mutations are at increased risk of Parkinson's disease (PD). It is still debated, however, whether this increased risk results from impaired glucocerebrosidase activity leading to substrate accumulation. Comparing the presence of prodromal PD marker in GBA mutation carriers and patients with Gaucher disease (GD) (in which substrate accumulation is extensive) can assist in clarifying this issue.In this cross-sectional study, we compared the hyperechogenic area of the substantia nigra, a prodromal PD marker, in large cohorts of GBA mutation carriers (n = 71) and patients with GD (n = 145). Our control populations were healthy, non-carriers (n = 49) and patients with GBA -related PD (n = 11). Substrate accumulation was assessed from dry blood spot levels of glucosylsphingosine.Our findings indicate no contribution of substrate accumulation, as the area of hyperechogenicity is similarly enlarged relative to healthy controls in both GBA mutation carriers and patients with GD. Moreover, this similarity between GBA carriers and patients with GD persists when comparing only carriers of the N370S (c.1226A>G) mutation (n = 38) with untreated patients with GD who were homozygotes for the same mutation (n = 47). In addition, measurements of hyperechogenic area did not correlate with levels of glucosylsphingosine in the untreated patients with GD.The presence of a marker of prodromal PD (substantia nigra hyperechogenicity) is independent of substrate accumulation in a population with mutated GBA . Although further longitudinal studies are needed to determine the precise predictive value of this marker for GBA -related PD, our findings raise doubts regarding the contribution of substance reduction strategies to PD prevention." @default.
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- W2912022330 date "2019-03-01" @default.
- W2912022330 modified "2023-09-26" @default.
- W2912022330 title "Prodromal substantia nigra sonography undermines suggested association between substrate accumulation and the risk for <i>GBA</i> -related Parkinson's disease" @default.
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- W2912022330 doi "https://doi.org/10.1111/ene.13927" @default.
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