Mucins In Gastric Cancer|OMICS International|Journal Of Neurology And Neurophysiology

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Mucins In Gastric Cancer

Mucins are high-molecular-weight glycoproteins, which are heavily decorated with O-linked oligo-saccharides and n-glycan chains, linked to a protein backbone. There are 21 mucin (MUC) genes known in the human genome. These genes encode 2 groups of mucins: secreted mucins and membrane-bound mucins. The main mucins expressed in the stomach are MUC 1 (membrane-bound) and MUC5AC and MUC6 (secreted). MUC5AC, forming the bulk of the adherent unstirred mucous layer, is secreted by surface foveolar cells, whereas MUC6 is secreted by neck and gland cells, and both are strongly expressed in normal gastric mucosa. These two mucin proteins remain segregated within the mucous gel in a laminated linear arrangement. Breach of the gastric mucosa (as in the case of peptic ulcer) is associated with quantitative or ultrastructural changes in the mucin molecule. These changes are mediated by NSAIDs, H. pylori and other factors, and may be pre or post translational in nature.
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Last date updated on July, 2021