PMID: 2110452Apr 15, 1990Paper

The T84 human colonic adenocarcinoma cell line produces mucin in culture and releases it in response to various secretagogues

The Biochemical Journal
D J McCoolG G Forstner

Abstract

The T84 colonic adenocarcinoma cell line, which has been used extensively as a model for studies of epithelial chloride secretion, also produces mucin and secretes it in culture. Electron microscopy of fixed sections of cultured cells, along with Immunogold labelling with an antibody to human small intestine (SI) mucin, revealed the presence of goblet-like cells with mucin-containing secretory granules. The mucin was of high molecular mass, had an amino acid composition similar to that of purified human SI and colonic mucins, and competed effectively with SI mucin for binding to the anti-(SI mucin) antibody. A sensitive solid-phase immunoassay specific for intestinal mucins was developed and used to measure mucin secretion by T84 cells. Cultures were treated for 30 min at 37 degrees C with a number of agents known to cause chloride secretion by T84 cell monolayers and the amount of mucin appearing in the medium was measured. Carbachol (1 mM), A23187 (10 microM), prostaglandin E1 (PGE1) (1 microM) and vasoactive intestinal polypeptide (VIP) (0.1 microM) all stimulated mucin release, but histamine (1 mM) had no effect. Whereas VIP is reported to stimulate chloride secretion more strongly than carbachol, it was less effective than...Continue Reading

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