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ResearchIn-Press PreviewGeneticsNeuroscience Open Access | 10.1172/JCI177430

Neuraminidase 1 secondary deficiency contributes to CNS pathology in neurological mucopolysaccharidoses via brain proteins hypersialylation

TianMeng Xu,1 Rachel Heon-Roberts,1 Travis Moore,1 Patricia Dubot,2 Xuefang Pan,2 Tianlin Guo,3 Christopher W. Cairo,4 Rebecca J. Holley,5 Brian Bigger,6 Thomas M. Durcan,7 Thierry Levade,8 Jerôme Ausseil,8 Bénédicte Amilhon,2 Alexei Gorelik,9 Bhushan Nagar,9 Shaukat Khan,10 Shunji Tomatsu,10 Luisa Sturiale,11 Angelo Palmigiano,12 Iris Röckle,13 Hauke Thiesler,13 Herbert Hildebrandt,13 Domenico Garozzo,12 and Alexey V. Pshezhetsky14

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Xu, T. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Heon-Roberts, R. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Moore, T. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Dubot, P. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Pan, X. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Cairo, C. in: PubMed | Google Scholar |

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Bigger, B. in: PubMed | Google Scholar |

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Durcan, T. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Levade, T. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Gorelik, A. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Nagar, B. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Khan, S. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Tomatsu, S. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Sturiale, L. in: PubMed | Google Scholar |

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Palmigiano, A. in: PubMed | Google Scholar |

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Thiesler, H. in: PubMed | Google Scholar

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

Find articles by Hildebrandt, H. in: PubMed | Google Scholar |

1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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1Department of Anatomy and Cell Biology, McGill University, Montreal, Canada

2Department of Paediatrics, CHU Sainte-Justine, Montreal, Canada

3Department of Chemistry, University Of Alberta, Edmonton, Canada

4Department of Chemistry, University of Alberta, Edmonton, Canada

5Biology Medicine and Health, The University of Manchester, Manchester, United Kingdom

6Centre for Regenerative Medicine, The University of Edinburgh, Edinburgh, United Kingdom

7The Neuro's Early Drug Discovery Unit, McGill University, Montreal, Canada

8IPBS CNRS UMR5089/ University of Toulouse, Toulouse, France

9Department of Biochemistry, McGill University, Montreal, Canada

10Nemours/Alfred I. duPont Hospital for Children, Wilmington, United States of America

11CNR - Institute for Polymers, Composites and Biomaterials, Catania, Italy

12CNR, Institute for Polymers, Composites and Biomaterials, Catania, Italy

13Institute of Clinical Biochemistry, Hannover Medical School, Hannover, Germany

14Department of Paediatrics, CHU Ste-Justine, Montreal, Canada

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Published June 20, 2025 - More info

J Clin Invest. https://doi.org/10.1172/JCI177430.
Copyright © 2025, Xu et al. This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Published June 20, 2025 - Version history
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Abstract

Mucopolysaccharidoses (MPS) are lysosomal storage diseases caused by defects in catabolism of glycosaminoglycans. MPS I, II, III and VII, associated with lysosomal accumulation of heparan sulphate (HS), manifest with neurological deterioration and currently lack effective treatments. We report that neuraminidase 1 (NEU1) activity is drastically reduced in brain tissues of neurological MPS patients and mouse models but not in neurological lysosomal disorders without HS storage. Accumulated HS disrupts the lysosomal multienzyme complex of NEU1 with cathepsin A (CTSA), β-galactosidase (GLB1) and glucosamine-6-sulfate sulfatase (GALNS) leading to NEU1 deficiency and partial GLB1 and GALNS deficiencies in cortical tissues and iPSC-derived cortical neurons of neurological MPS patients. Increased sialylation of N-linked glycans in brains of MPS patients and mice implicated insufficient processing of sialylated glycans, except for polysialic acid. Correction of NEU1 activity in MPS IIIC mice by lentiviral gene transfer ameliorated previously identified hallmarks of the disease, including memory impairment, behavioural traits, and reduced levels of excitatory synapse markers VGLUT1 and PSD95. Overexpression of NEU1 also restored levels of VGLUT1/PSD95-positive puncta in cortical iPSC-derived MPS IIIA neurons. Our results demonstrate that HS-induced secondary NEU1 deficiency and aberrant sialylation of brain glycoproteins constitute what we believe to be a novel pathological pathway in neurological MPS spectrum crucially contributing to CNS pathology.

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