Loss of transcriptional repression contributes to the ectopic expression of the calcitonin/alpha-CGRP gene in a human lung carcinoma cell line

A J Symes, R K Craig, P M Brickell

Research output: Contribution to journalArticlepeer-review

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Abstract

The calcitonin/alpha-CGRP (CT/CGRP) gene is ectopically expressed in a wide variety of neoplasia. We have investigated the molecular mechanisms responsible for this ectopic expression in the human cell line BEN, which is derived from a poorly differentiated squamous cell lung carcinoma. We show that a trans-acting factor which represses expression of the CT/CGRP gene in HeLa cells is absent or inactive in BEN cells, and have localised the repressor binding site to a 53 bp fragment 1500 bp upstream of the transcription start site.

Original languageEnglish
Pages (from-to)229-33
Number of pages5
JournalFEBS Letters
Volume306
Issue number2-3
DOIs
StatePublished - 20 Jul 1992

Keywords

  • Base Sequence
  • Binding Sites
  • Calcitonin Gene-Related Peptide/genetics
  • Carcinoma, Squamous Cell/genetics
  • DNA, Neoplasm/metabolism
  • Gene Expression Regulation, Neoplastic
  • HeLa Cells
  • Humans
  • Lung Neoplasms/genetics
  • Molecular Sequence Data
  • Repressor Proteins/metabolism
  • Restriction Mapping
  • Transcription, Genetic
  • Transfection
  • Tumor Cells, Cultured

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