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Zizioli, Daniela; Codenotti, Silvia; Benaglia, Giuliana; Manzoni, Marta; Massardi, Elena; Fanzani, Alessandro; Borsani, Giuseppe; Monti, Eugenio
International journal of molecular sciences, 2023-Sep-01, 2023-09-01, 20230901, Letnik: 24, Številka: 17Journal Article
Sialidases remove terminal sialic acids residues from the non-reducing ends of glycoconjugates. They have been recognized as catabolic enzymes that work within different subcellular compartments and can ensure the proper turn-over of glycoconjugates. Four mammalian sialidases (NEU1-4) exist, with different subcellular localization, pH optimum and substrate specificity. In zebrafish, seven different sialidases, with high homology to mammalian counterparts, have been identified. Zebrafish Neu3.2 is similar to the human cytosolic sialidase NEU2, which is involved in skeletal muscle differentiation and exhibits a broad substrate specificity toward gangliosides and glycoproteins. In zebrafish , mRNA is expressed during somite development, and its enzymatic activity has been detected in the skeletal muscle and heart of adult animals. In this paper, 1-4-cell-stage embryos injected with splice-blocking morpholino showed severe embryonic defects, mainly in somites, heart and anterior-posterior axis formation. and expressions were altered in morphants, and impaired musculature formation was associated with a defective locomotor behavior. Finally, the co-injection of mouse mRNA in morphants rescued the phenotype. These data are consistent with the involvement of cytosolic sialidase in pathologies related to muscle formation and support the validity of the model to investigate the pathogenesis of the diseases.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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