DOPA Decarboxylase (DDC) has been proposed as a cerebrospinal fluid (CSF) biomarker with increased concentrations in Lewy body disorders (LBDs) and highest levels in patients receiving dopaminergic treatment. Here we evaluate plasma DDC, measured by proximity extension assay, and the effect of dopaminergic treatment in three independent LBD (with a focus on dementia with Lewy bodies (DLB) and Parkinson's disease (PD)) cohorts: an autopsy-confirmed cohort (n = 71), a large multicenter, cross-dementia cohort (n = 1498) and a longitudinal cohort with detailed treatment information (n = 66, median follow-up time[IQR] = 4[4, 4] years). Plasma DDC was not altered between different LBDs and other disease groups or controls in absence of treatment. DDC levels increased over time in PD, being significantly associated to higher dosages of dopaminergic treatment. This emphasizes the need to consider treatment effect when analyzing plasma DDC, and suggests that plasma DDC, in contrast to CSF DDC, is of limited use as a diagnostic biomarker for LBD, but could be valuable for treatment monitoring.
- MeSH
- biologické markery * krev mozkomíšní mok MeSH
- demence s Lewyho tělísky * farmakoterapie krev mozkomíšní mok MeSH
- DOPA-dekarboxylasa * metabolismus MeSH
- dopaminové látky terapeutické užití MeSH
- kohortové studie MeSH
- lidé středního věku MeSH
- lidé MeSH
- longitudinální studie MeSH
- Parkinsonova nemoc * farmakoterapie krev mozkomíšní mok MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- multicentrická studie MeSH
- Názvy látek
- biologické markery * MeSH
- DOPA-dekarboxylasa * MeSH
- dopaminové látky MeSH
