NANS-mediated synthesis of sialic acid is required for brain and skeletal development

van Karnebeek, Clara D. M. and Bonafé, Luisa and Wen, Xiao-Yan and Tarailo-Graovac, Maja and Balzano, Sara and Royer-Bertrand, Beryl and Ashikov, Angel and Garavelli, Livia and Mammi, Isabella and Turolla, Licia and Breen, Catherine and Donnai, Dian and Cormier-Daire, Valérie and Heron, Delphine and Nishimura, Gen and Uchikawa, Shinichi and Campos-Xavier, Belinda and Rossi, Antonio and Hennet, Thierry and Brand-Arzamendi, Koroboshka and Rozmus, Jacob and Harshman, Keith and Stevenson, Brian J. and Girardi, Enrico and Superti-Furga, Giulio and Dewan, Tammie and Collingridge, Alissa and Halparin, Jessie and Ross, Colin J. and Van Allen, Margot I. and Rossi, Andrea and Engelke, Udo F. and Kluijtmans, Leo A. J. and van der Heeft, Ed and Renkema, Herma and de Brouwer, Arjan and Huijben, Karin and Zijlstra, Fokje and Heise, Torben and Boltje, Thomas and Wasserman, Wyeth W. and Rivolta, Carlo and Unger, Sheila and Lefeber, Dirk J. and Wevers, Ron A. and Superti-Furga, Andrea. (2016) NANS-mediated synthesis of sialic acid is required for brain and skeletal development. Nature Genetics, 48 (7). pp. 777-784.

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Official URL: https://edoc.unibas.ch/81705/

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We identified biallelic mutations in NANS, the gene encoding the synthase for N-acetylneuraminic acid (NeuNAc; sialic acid), in nine individuals with infantile-onset severe developmental delay and skeletal dysplasia. Patient body fluids showed an elevation in N-acetyl-D-mannosamine levels, and patient-derived fibroblasts had reduced NANS activity and were unable to incorporate sialic acid precursors into sialylated glycoproteins. Knockdown of nansa in zebrafish embryos resulted in abnormal skeletal development, and exogenously added sialic acid partially rescued the skeletal phenotype. Thus, NANS-mediated synthesis of sialic acid is required for early brain development and skeletal growth. Normal sialylation of plasma proteins was observed in spite of NANS deficiency. Exploration of endogenous synthesis, nutritional absorption, and rescue pathways for sialic acid in different tissues and developmental phases is warranted to design therapeutic strategies to counteract NANS deficiency and to shed light on sialic acid metabolism and its implications for human nutrition.
Faculties and Departments:03 Faculty of Medicine
09 Associated Institutions > Institute of Molecular and Clinical Ophthalmology Basel (IOB)
UniBasel Contributors:Rivolta, Carlo
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer Nature
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:03 Mar 2021 14:29
Deposited On:03 Mar 2021 14:29

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