Molecular cloning and knockdown of galactocerebrosidase in zebrafish: New insights into the pathogenesis of Krabbe's disease

Daniela Zizioli, Michela Guarienti, Chiara Tobia, Giuseppina Gariano, Giuseppe Borsani, Roberto Bresciani, Roberto Ronca, Edoardo Giacopuzzi, Augusto Preti, Germano Gaudenzi, Mirella Belleri, Emanuela Di Salle, Gemma Fabrias, Josefina Casas, Domenico Ribatti, Eugenio Monti, Marco Presta

Research output: Contribution to journalArticle

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Abstract

The lysosomal hydrolase galactocerebrosidase (GALC) catalyzes the removal of galactose from galactosylceramide and from other sphingolipids. GALC deficiency is responsible for globoid cell leukodystrophy (GLD), or Krabbe's disease, an early lethal inherited neurodegenerative disorder characterized by the accumulation of the neurotoxic metabolite psychosine in the central nervous system (CNS). The poor outcome of current clinical treatments calls for novel model systems to investigate the biological impact of GALC down-regulation and for the search of novel therapeutic strategies in GLD. Zebrafish (Danio rerio) represents an attractive vertebrate model for human diseases. Here, lysosomal GALC activity was demonstrated in the brain of zebrafish adults and embryos. Accordingly, we identified two GALC co-orthologs (named galca and galcb) dynamically co-expressed in CNS during zebrafish development. Both genes encode for lysosomal enzymes endowed with GALC activity. Single down-regulation of galca or galcb by specific antisense morpholino oligonucleotides results in a partial decrease of GALC activity in zebrafish embryos that was abrogated in double galca/. galcb morphants. However, no psychosine accumulation was observed in galca/. galcb double morphants. Nevertheless, double galca/. galcb knockdown caused reduction and partial disorganization of the expression of the early neuronal marker neuroD and an increase of apoptotic events during CNS development. These observations provide new insights into the pathogenesis of GLD, indicating that GALC loss-of-function may have pathological consequences in developing CNS independent of psychosine accumulation. Also, they underscore the potentiality of the zebrafish system in studying the pathogenesis of lysosomal neurodegenerative diseases, including GLD.

Original languageEnglish
Pages (from-to)665-675
Number of pages11
JournalBiochimica et Biophysica Acta - Molecular Basis of Disease
Volume1842
Issue number4
DOIs
Publication statusPublished - Apr 2014

Fingerprint

Galactosylceramidase
Globoid Cell Leukodystrophy
Molecular Cloning
Zebrafish
Psychosine
Central Nervous System
Neurodegenerative Diseases
Down-Regulation
Embryonic Structures
Galactosylceramides
Morpholinos
Sphingolipids
Antisense Oligonucleotides
Hydrolases
Galactose
Vertebrates

Keywords

  • Embryonic development
  • Galactosylceramidase
  • Krabbe disease
  • Sphingolipid
  • Zebrafish

ASJC Scopus subject areas

  • Molecular Biology
  • Molecular Medicine

Cite this

Molecular cloning and knockdown of galactocerebrosidase in zebrafish : New insights into the pathogenesis of Krabbe's disease. / Zizioli, Daniela; Guarienti, Michela; Tobia, Chiara; Gariano, Giuseppina; Borsani, Giuseppe; Bresciani, Roberto; Ronca, Roberto; Giacopuzzi, Edoardo; Preti, Augusto; Gaudenzi, Germano; Belleri, Mirella; Di Salle, Emanuela; Fabrias, Gemma; Casas, Josefina; Ribatti, Domenico; Monti, Eugenio; Presta, Marco.

In: Biochimica et Biophysica Acta - Molecular Basis of Disease, Vol. 1842, No. 4, 04.2014, p. 665-675.

Research output: Contribution to journalArticle

Zizioli, D, Guarienti, M, Tobia, C, Gariano, G, Borsani, G, Bresciani, R, Ronca, R, Giacopuzzi, E, Preti, A, Gaudenzi, G, Belleri, M, Di Salle, E, Fabrias, G, Casas, J, Ribatti, D, Monti, E & Presta, M 2014, 'Molecular cloning and knockdown of galactocerebrosidase in zebrafish: New insights into the pathogenesis of Krabbe's disease', Biochimica et Biophysica Acta - Molecular Basis of Disease, vol. 1842, no. 4, pp. 665-675. https://doi.org/10.1016/j.bbadis.2014.01.008
Zizioli, Daniela ; Guarienti, Michela ; Tobia, Chiara ; Gariano, Giuseppina ; Borsani, Giuseppe ; Bresciani, Roberto ; Ronca, Roberto ; Giacopuzzi, Edoardo ; Preti, Augusto ; Gaudenzi, Germano ; Belleri, Mirella ; Di Salle, Emanuela ; Fabrias, Gemma ; Casas, Josefina ; Ribatti, Domenico ; Monti, Eugenio ; Presta, Marco. / Molecular cloning and knockdown of galactocerebrosidase in zebrafish : New insights into the pathogenesis of Krabbe's disease. In: Biochimica et Biophysica Acta - Molecular Basis of Disease. 2014 ; Vol. 1842, No. 4. pp. 665-675.
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AU - Gariano, Giuseppina

AU - Borsani, Giuseppe

AU - Bresciani, Roberto

AU - Ronca, Roberto

AU - Giacopuzzi, Edoardo

AU - Preti, Augusto

AU - Gaudenzi, Germano

AU - Belleri, Mirella

AU - Di Salle, Emanuela

AU - Fabrias, Gemma

AU - Casas, Josefina

AU - Ribatti, Domenico

AU - Monti, Eugenio

AU - Presta, Marco

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