Identification of a goblet cell-specific enhancer element in the rat intestinal trefoil factor gene promoter bound by a goblet cell nuclear protein

Haruhiko Ogata, Nagamu Inoue, Daniel K. Podolsky

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Intestinal trefoil factor (ITF) is selectively expressed in goblet cells of the small and large intestinal mucosa. Detailed analysis of the rat ITF (RITF) promoter was undertaken by transient transfection and gel mobility shift assays (GMSAs) using the goblet cell-like LS174T colon cancer-derived cell line. Various lengths of wildtype or mutant constructs of the 5'- flanking region were linked to the pXP2 reporter gene luciferase. Expression of -118 RITF was significantly decreased compared with -154 RITF, and transfection with an 18-base pair construct (-141 to -124) resulted in more than 5-fold greater expression than transfection with the promoterless pXP2 gene construct alone. Using various synthetic oligonucleotide mutants, GMSAs revealed that only a 9-base pair sequence (CCCCTCCCC) in this element was required for specific binding, overlapping but distinct from a Sp1-like element. GMSA demonstrated that this element was specifically bound by nuclear proteins from intestinal cells with a goblet cell-like phenotype. These studies demonstrate that a 9-base pair element (goblet cell response element) between -154 and -118 in the RITF promoter gene is a cis-active element bound by a distinct nuclear transcription factor and is capable of directing intestine and goblet cell-specific expression.

Original languageEnglish (US)
Pages (from-to)3060-3067
Number of pages8
JournalJournal of Biological Chemistry
Volume273
Issue number5
DOIs
StatePublished - Jan 30 1998

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Goblet Cells
Nuclear Proteins
Rats
Assays
Genes
Gels
Electrophoretic Mobility Shift Assay
Base Pairing
Transfection
5' Flanking Region
Response Elements
Luciferases
Oligonucleotides
Transcription Factors
Cells
Intestinal Mucosa
Reporter Genes
Colonic Neoplasms
Intestines
rat TFF3 protein

ASJC Scopus subject areas

  • Biochemistry

Cite this

Identification of a goblet cell-specific enhancer element in the rat intestinal trefoil factor gene promoter bound by a goblet cell nuclear protein. / Ogata, Haruhiko; Inoue, Nagamu; Podolsky, Daniel K.

In: Journal of Biological Chemistry, Vol. 273, No. 5, 30.01.1998, p. 3060-3067.

Research output: Contribution to journalArticle

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