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. 2005 Jul 12;93(3):310–318. doi: 10.1038/sj.bjc.6602700

Figure 3.

Figure 3

Liganded RARβ2 modulates CYP26A1 expression. RARβ2 gene expression was analysed with the standard competitive RT–PCR, and CYP26A1 expression was analysed by competitive RT–PCR in RA-sensitive SH-SY5Y, Calu-6, and T47D cells and noncompetitive RT–PCR in RA-resistant cells, with housekeeping gene β2M as an internal control. (A, B) CYP26A1 transcription was determined in MDA-MB-231 (A) or SK-MES-1 cells (B) transiently transfected with RARβ2 cDNA plasmid or vector plasmid and treated with control or 10 μM aRA for 24 h (Lanes 2 and 5) or 3 days (lanes 3 and 6). Last lane in (B) contained the positive control from Calu-6 cells treated with 10 μM aRA for 3 days. (C) RARβ2 and CYP26A1 expression was analysed in SH-SY5Y, Calu-6, and T-47D cells transfected with scramble siRNA or RARβ2 siRNA and treated with 10 μM aRA for 48 h.