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NEU1 (neuraminidase 1; lysosomal sialidase 1) is a
glycohydrolase that removes terminal sialic-acid residues from glycoproteins and
glycolipids. NEU1 functions mainly in lysosomes but can also participate in
cell-surface receptor regulation, adhesion, autophagy, inflammation and growth
factor signalling. Altered NEU1 activity can modify the sialylation, stability
and signalling of receptors and adhesion molecules, thereby affecting
proliferation, survival, migration and invasion. Its role in cancer is
context-dependent: increased NEU1 has promoted tumour growth or
migration in some models, whereas reduced NEU1 has increased aggressiveness in
others, including reported cervical-cancer models.
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