TY  - JOUR
AU  - Lerche, Stefanie
AU  - Schulte, Claudia
AU  - Wurster, Isabel
AU  - Machetanz, Gerrit
AU  - Roeben, Benjamin
AU  - Zimmermann, Milan
AU  - Deuschle, Christian
AU  - Hauser, Ann-Kathrin
AU  - Böhringer, Judith
AU  - Kragelöh-Mann, Ingeborg
AU  - Waniek, Katharina
AU  - Lachmann, Ingolf
AU  - Petterson, Xuan-Mai T
AU  - Chiang, Ruby
AU  - Park, Hyejung
AU  - Wang, Bing
AU  - Liepelt-Scarfone, Inga
AU  - Maetzler, Walter
AU  - Galasko, Douglas
AU  - Scherzer, Clemens R
AU  - Gasser, Thomas
AU  - Mielke, Michelle M
AU  - Hutten, Samantha J
AU  - Mollenhauer, Brit
AU  - Sardi, S Pablo
AU  - Berg, Daniela
AU  - Brockmann, Kathrin
TI  - The Mutation Matters: CSF Profiles of GCase, Sphingolipids, α-Synuclein in PDGBA.
JO  - Movement disorders
VL  - 36
IS  - 5
SN  - 1531-8257
CY  - New York, NY
PB  - Wiley
M1  - DZNE-2021-01263
SP  - 1216 - 1228
PY  - 2021
AB  - With pathway-specific trials in PD associated with variants in the glucocerebrosidase gene (PDGBA ) under way, we need markers that confirm the impact of genetic variants in patient-derived biofluids in order to allow patient stratification merely based on genetics and that might serve as biochemical read-out for target engagement.To explore GBA-pathway-specific biomarker profiles cross-sectionally (TUEPAC-MIGAP, PPMI) and longitudinally (PPMI).We measured enzyme activity of the lysosomal glucocerebrosidase, CSF levels of glucosylceramides (upstream substrate of glucocerebrosidase), CSF levels of ceramides (downstream product of glucocerebrosidase), lactosylceramides, sphingosines, sphingomyelin (by-products) and CSF levels of total α-synuclein in PDGBA patients compared to PDGBA_wildtype patients.Cross-sectionally in both cohorts and longitudinally in PPMI: (1) glucocerebrosidase activity was significantly lower in PDGBA compared to PDGBA_wildtype . (2) CSF levels of upstream substrates (glucosylceramides species) were higher in PDGBA compared to PDGBA_wildtype . (3) CSF levels of total α-synuclein were lower in PDGBA compared to PDGBA_wildtype . All of these findings were most pronounced in PDGBA with severe mutations (PDGBA_severe ). Cross-sectionally in TUEPAC-MIGAP and longitudinally in PPMI, CSF levels of downstream-products (ceramides) were higher in PDGBA_severe . Cross-sectionally in TUEPAC-MIGAP by-products sphinganine and sphingosine-1-phosphate and longitudinally in PPMI species of by-products lactosylceramides and sphingomyelin were higher in PDGBA_severe .These findings confirm that GBA mutations have a relevant functional impact on biomarker profiles in patients. Bridging the gap between genetics and biochemical profiles now allows patient stratification for clinical trials merely based on mutation status. Importantly, all findings were most prominent in PDGBA with severe variants. © 2021 International Parkinson and Movement Disorder Society.
KW  - Glucosylceramidase: genetics
KW  - Humans
KW  - Mutation: genetics
KW  - Parkinson Disease: genetics
KW  - Sphingolipids
KW  - alpha-Synuclein: genetics
KW  - CSF (Other)
KW  - GBA (Other)
KW  - GCase (Other)
KW  - ceramides (Other)
KW  - α-synuclein (Other)
KW  - Sphingolipids (NLM Chemicals)
KW  - alpha-Synuclein (NLM Chemicals)
KW  - Glucosylceramidase (NLM Chemicals)
LB  - PUB:(DE-HGF)16
C6  - pmid:33547828
DO  - DOI:10.1002/mds.28472
UR  - https://pub.dzne.de/record/157806
ER  -