Context-specific regulation of LINE-1

Ivo Teneng, Vilius Stribinskis, Kenneth S. Ramos

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

The present study was conducted to evaluate the contextual specificity of long interspersed nuclear element-1 (LINE-1 or L1) activation by cellular stress and the role of the aryl hydrocarbon receptor (AHR) transcription factor and oxidative stress in the gene activation response. Activation of the AHR by the genotoxic carcinogen benzo(a)pyrene (BaP) increased L1 expression in human cervical carcinoma (HeLa) cells, human microvascular endothelial cells (HMEC), mouse vascular smooth muscle cells (mVSMC) and mouse embryonic kidney cells (mK4). In contrast, challenge with a different AHR ligand 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or UV irradiation (10-20 J/ m2), induced L1 only in HeLa cells. Transactivation of the mouse L1Md-A5 promoter was observed in all cell types challenged with BaP, while TCDD was without effect, and UV only activated L1 in HeLa cells. Genetic and pharmacological experiments implicated the AHR and oxidative stress as contextual determinants of L1 inducibility by cellular stress.

Original languageEnglish (US)
Pages (from-to)1101-1110
Number of pages10
JournalGenes to Cells
Volume12
Issue number10
DOIs
StatePublished - Oct 1 2007
Externally publishedYes

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ASJC Scopus subject areas

  • Genetics
  • Cell Biology

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