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Related Experiment Videos

Microarray analysis uncovers retinoid targets in human bronchial epithelial cells.

Yan Ma1, Petra H Koza-Taylor, Debra A DiMattia

  • 1Department of Pharmacology and Toxicology, Dartmouth Medical School, Hanover, NH 03755, USA.

Oncogene
|August 2, 2003
PubMed
Summary

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This study identified 11 all-trans-retinoic acid (RA) target genes in human bronchial cells, including three novel genes linked to cancer prevention. Aberrant gene expression in resistant cells highlights mechanisms of retinoid response and resistance.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Retinoids, vitamin A derivatives, are crucial in cancer treatment and prevention.
  • Understanding retinoid response and resistance mechanisms is vital for effective cancer therapy.

Purpose of the Study:

  • Identify all-trans-retinoic acid (RA) target genes involved in growth suppression in human bronchial epithelial cells.
  • Investigate gene expression patterns in RA-resistant cells to elucidate resistance mechanisms.

Main Methods:

  • Microarray analysis using Affymetrix arrays to identify RA-induced genes.
  • Validation of candidate genes using reverse transcription polymerase chain reaction (RT-PCR), Western, and Northern analyses.
  • Expression profiling in RA-resistant BEAS-2B-R1 cells.

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Main Results:

  • Identified 11 candidate RA-target genes, including three novel genes: placental bone morphogenetic protein (PLAB), polyamine oxidase isoform 1 (PAOh1), and E74-like factor 3 (ELF3).
  • Observed dysregulated expression of several genes (G0S2, HMOX1, TNFAIP2, Id1, FOSL1, TGM2, ASNS, PLAB, PAOh1, ELF3) in RA-resistant cells.
  • Confirmed prominent induction of insulin-like growth-factor-binding protein 6 (IGFBP6) in resistant cells.

Conclusions:

  • This study identified novel RA target genes in human bronchial epithelial cells.
  • Aberrant expression of identified genes in RA-resistant cells suggests their direct involvement in RA signaling pathways.
  • Findings contribute to understanding retinoid mechanisms in cancer prevention and resistance.