Volume 4 Supplement 1

European Society for Neurochemistry Biannual Conference: Molecular Mechanisms of Regulation in the Nervous System

Open Access

Glycohydrolases in the central nervous system: the role of GBA2 in the neuronal differentiation

  • Maura Samarani1,
  • Nicoletta Loberto1,
  • Valentina Murdica1,
  • Domitilla Schiumarini1,
  • Simona Prioni1,
  • Alessandro Prinetti1,
  • Sandro Sonnino1,
  • Rosaria Bassi1 and
  • Massimo Aureli1
SpringerPlus20154(Suppl 1):P42

https://doi.org/10.1186/2193-1801-4-S1-P42

Published: 12 June 2015

Keywords

Sphingolipids Neuronal differentiation GBA2

Mammalian neurodevelopment is characterized by qualitative and quantitative changes in plasma membrane glycosphingolipids due to a fine regulation of their metabolic pathways. While the biosynthetic pathway is largely studied scant is the information available on the catabolic one. For this reason, I studied the activity of the main glycohydrolases expressed in the central nervous system during neuronal differentiation. To this purpose the activities of the principal glycohydrolases involved in glycosphingolipid catabolism have been evaluated in different experimental models such as brains and cerebella of mouse at different ages and neuronal cell cultures (immortalized mouse neuronal cell lines GN11 and GT1-7, primary cultures of mouse cerebellar granule cells and human neuroblastoma cells SH-SY5Y). The results obtained indicate that the process of neuronal differentiation is associated with a marked increase in the activities of all the glycohydrolases evaluated, in particular, the activity of the non-lysosomal β-glucosylceramidase GBA2 undergoes the most relevant increase representing the prevalent form of β-glucocerebrosidase in mature neurons. In order to evaluate the possible role of GBA2 in the neuronal differentiation, SH-SY5Y cells have been stably trasfected for GBA2 overexpression. Cells overexpressing GBA2 acquired a neuronal phenotype and showed a significant increase in ceramide levels. These results are in line with literature data that demonstrate the involvement of ceramide in the neuronal differentiation. Therefore, it is possible to hypothesize that the hydrolysis of glucosylceramide to ceramide, catalyzed by GBA2 at the plasma membrane level, has a functional role in the neuronal differentiation process. Collectively these findings suggest that GBA2 may represent a possible neuronal marker and demonstrate for the first time its direct involvement in the neuronal differentiation.

Authors’ Affiliations

(1)
Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano

Copyright

© Samarani et al. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.