PMID- 9548214 OWN - NLM STAT- MEDLINE DCOM- 19980519 LR - 20190813 IS - 0303-7207 (Print) IS - 0303-7207 (Linking) VI - 136 IP - 2 DP - 1998 Jan 15 TI - Ligand-inducible retinoid X receptor-mediated protein: DNA interactions in the retinoic acid receptor beta2 gene promoter in vivo. PG - 109-18 AB - Retinoid X receptors (RXRs) are recently characterized transcription factors that are members of the nuclear hormone receptor superfamily. However, it is not known whether the endogenous RXR complex requires its ligand for access to its hormone response element (HRE) of a target gene in vivo. Hence, dimethyl sulfate-based genomic footprinting was carried out to examine occupancy of HREs in the retinoic acid (RA) receptor beta2 (RARbeta2) gene promoter in the murine melanoma cell line S91 cultured in the absence or presence of T3, all-trans-RA (atRA), or CD2624, an RXR-selective retinoid. No footprint was observed at the RA-response element (betaRARE) in the absence of ligands. However, a footprint was detected at the betaRARE and other cis-acting elements after a 6 h incubation with CD2624 and atRA. Interestingly, only the betaRARE was footprinted after 60 min incubation with CD2624. These results suggest that the endogenous RXR complex can interact with an HRE of a target gene in the presence of ligand, and subsequently may initiate additional interactions between DNA and other transcription factors. FAU - Ikeda, M AU - Ikeda M AD - The Third Department of Internal Medicine, Yamanashi Medical University, Tamaho, Japan. FAU - Spanjaard, R A AU - Spanjaard RA FAU - Noordhoek, E W AU - Noordhoek EW FAU - Kawaguchi, A AU - Kawaguchi A FAU - Onaya, T AU - Onaya T FAU - Chin, W W AU - Chin WW LA - eng GR - DK 50300/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Ireland TA - Mol Cell Endocrinol JT - Molecular and cellular endocrinology JID - 7500844 RN - 0 (Benzoates) RN - 0 (CD 2624) RN - 0 (Naphthalenes) RN - 0 (Receptors, Retinoic Acid) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Retinoid X Receptors) RN - 0 (Transcription Factors) RN - 06LU7C9H1V (Triiodothyronine) RN - 5688UTC01R (Tretinoin) RN - 9007-49-2 (DNA) RN - EC 1.13.12.- (Luciferases) SB - IM MH - Animals MH - Benzoates/pharmacology MH - DNA/*metabolism MH - DNA Footprinting MH - Dimerization MH - Gene Expression Regulation/drug effects MH - Luciferases/genetics MH - Melanoma, Experimental/metabolism MH - Mice MH - Naphthalenes/pharmacology MH - *Promoter Regions, Genetic MH - Receptors, Retinoic Acid/*genetics/*physiology MH - Recombinant Fusion Proteins MH - Retinoid X Receptors MH - Transcription Factors/*metabolism/*physiology MH - Transfection MH - Tretinoin/pharmacology MH - Triiodothyronine/pharmacology MH - Tumor Cells, Cultured EDAT- 1998/04/21 00:00 MHDA- 1998/04/21 00:01 CRDT- 1998/04/21 00:00 PHST- 1998/04/21 00:00 [pubmed] PHST- 1998/04/21 00:01 [medline] PHST- 1998/04/21 00:00 [entrez] AID - S0303720797002177 [pii] AID - 10.1016/s0303-7207(97)00217-7 [doi] PST - ppublish SO - Mol Cell Endocrinol. 1998 Jan 15;136(2):109-18. doi: 10.1016/s0303-7207(97)00217-7.