Glucocerebrosidase 1 deficient Danio rerio mirror key pathological aspects of human Gaucher disease and provide evidence of early microglial activation preceding alpha-synuclein-independent neuronal cell death

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Keatinge , M , Bui , H , Menke , A , Chen , Y-C , Sokol , A M , Bai , Q , Ellett , F , Da Costa , M , Burke , D , Gegg , M , Trollope , L , Payne , T , McTighe , A , Mortiboys , H , de Jager , S , Nuthall , H , Kuo , M-S , Fleming , A , Schapira , A H V , Renshaw , S A , Highley , J R , Chacinska , A , Panula , P , Burton , E A , O'Neill , M J & Bandmann , O 2015 , ' Glucocerebrosidase 1 deficient Danio rerio mirror key pathological aspects of human Gaucher disease and provide evidence of early microglial activation preceding alpha-synuclein-independent neuronal cell death ' , Human Molecular Genetics , vol. 24 , no. 23 , pp. 6640-6652 . https://doi.org/10.1093/hmg/ddv369

Title: Glucocerebrosidase 1 deficient Danio rerio mirror key pathological aspects of human Gaucher disease and provide evidence of early microglial activation preceding alpha-synuclein-independent neuronal cell death
Author: Keatinge, Marcus; Bui, Hai; Menke, Aswin; Chen, Yu-Chia; Sokol, Anna M.; Bai, Qing; Ellett, Felix; Da Costa, Marc; Burke, Derek; Gegg, Matthew; Trollope, Lisa; Payne, Thomas; McTighe, Aimee; Mortiboys, Heather; de Jager, Sarah; Nuthall, Hugh; Kuo, Ming-Shang; Fleming, Angeleen; Schapira, Anthony H. V.; Renshaw, Stephen A.; Highley, J. Robin; Chacinska, Agnieszka; Panula, Pertti; Burton, Edward A.; O'Neill, Michael J.; Bandmann, Oliver
Contributor: University of Helsinki, Medicum
University of Helsinki, Medicum
Date: 2015-12-01
Language: eng
Number of pages: 13
Belongs to series: Human Molecular Genetics
ISSN: 0964-6906
URI: http://hdl.handle.net/10138/225054
Abstract: Autosomal recessively inherited glucocerebrosidase 1 (GBA1) mutations cause the lysosomal storage disorder Gaucher's disease (GD). Heterozygous GBA1 mutations (GBA1(+/-)) are the most common risk factor for Parkinson's disease (PD). Previous studies typically focused on the interaction between the reduction of glucocerebrosidase (enzymatic) activity in GBA1(+/-) carriers and alpha-synuclein-mediated neurotoxicity. However, it is unclear whether other mechanisms also contribute to the increased risk of PD in GBA1(+/-) carriers. The zebrafish genome does not contain alpha-synuclein (SNCA), thus providing a unique opportunity to study pathogenic mechanisms unrelated to alpha-synuclein toxicity. Here we describe a mutant zebrafish line created by TALEN genome editing carrying a 23 bp deletion in gba1 (gba1(c.1276_1298del)), the zebrafish orthologue of human GBA1. Marked sphingolipid accumulation was already detected at 5 days post-fertilization with accompanying microglial activation and early, sustained up-regulation of miR-155, a master regulator of inflammation. gba1c.1276_1298del mutant zebrafish developed a rapidly worsening phenotype from 8 weeks onwards with striking reduction in motor activity by 12 weeks. Histopathologically, we observed marked Gaucher cell invasion of the brain and other organs. Dopaminergic neuronal cell count was normal through development but reduced by >30% at 12 weeks in the presence of ubiquitin-positive, intra-neuronal inclusions. This gba1c.1276_1298del zebrafish line is the first viable vertebrate model sharing key pathological features of GD in both neuronal and non-neuronal tissue. Our study also provides evidence for early microglial activation prior to alpha-synuclein independent neuronal cell death in GBA1 deficiency and suggests upregulation of miR-155 as a common denominator across different neurodegenerative disorders.
Subject: PARKINSONS-DISEASE
MOUSE MODEL
DOPAMINERGIC SYSTEM
LARVAL ZEBRAFISH
COMPLEX-I
MUTATIONS
BRAIN
NEURODEGENERATION
MIR-155
ACCUMULATION
3111 Biomedicine
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