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Updated: Sep 20, 2026
Isolation of Lung Retinoid-Containing Cells by Cell Sorting
Published on: April 11, 2025
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.
Abstract:
Retinoids, the natural and synthetic derivatives of vitamin A, have a role in cancer treatment and prevention. There is a need to reveal mechanisms that account for retinoid response or resistance. This study identified candidate all-trans-retinoic acid (RA) target genes linked to growth suppression in BEAS-2B human bronchial epithelial cells. Microarray analyses were performed using Affymetrix arrays. A total of 11 RA-induced species were validated by reverse transcription polymerase chain reaction (RT-PCR), Western or Northern analyses. Three of these species were novel candidate RA-target genes in human bronchial epithelial cells. These included: placental bone morphogenetic protein (PLAB), polyamine oxidase isoform 1 (PAOh1) and E74-like factor 3 (ELF3). Expression patterns were studied in RA-resistant BEAS-2B-R1 cells. In BEAS-2B-R1 cells, RA dysregulated the expression of the putative lymphocyte G0/G1 switch gene (G0S2), heme oxygenase 1 (HMOX1), tumor necrosis factor-alpha-induced protein 2 (TNFAIP2), inhibitor of DNA binding 1(Id1), fos-like antigen 1 (FOSL1), transglutaminase 2 (TGM2), asparagine synthetase (ASNS), PLAB, PAOh1 and ELF3, while prominent induction of insulin-like growth-factor-binding protein 6 (IGFBP6) still occurred. In summary, this study identified 11 candidate RA-target genes in human bronchial epithelial cells including three novel species. Expression studies in BEAS-2B-R1 cells indicated that several were directly implicated in RA signaling, since their aberrant expression was linked to RA resistance of human bronchial epithelial cells.
Insights
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.
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.
