PMID- 23823656 OWN - NLM STAT- MEDLINE DCOM- 20140616 LR - 20220218 IS - 1476-5551 (Electronic) IS - 0887-6924 (Print) IS - 0887-6924 (Linking) VI - 28 IP - 4 DP - 2014 Apr TI - Induced differentiation of acute myeloid leukemia cells by activation of retinoid X and liver X receptors. PG - 749-60 LID - 10.1038/leu.2013.202 [doi] AB - Use of all-trans retinoic acid (ATRA) as a differentiation agent has been limited to acute promyelocytic leukemia (APL) as non-APL leukemias are insensitive to ATRA. We recently demonstrated that the rexinoid, bexarotene, induces differentiation and therapeutic responses in patients with refractory AML. Rexinoids bind and activate retinoid X receptors (RXRs); however, rexinoids alone are incapable of activating retinoic acid receptor (RAR)/RXR complexes, suggesting that myeloid differentiation can occur independent of RAR. In this study, we demonstrate that rexinoid differentiation of AML cells is RAR independent and requires the expression of PU.1. Because of the promiscuousness of RXR with other nuclear receptors, myeloid differentiation by bexarotene with other nuclear receptor ligands was explored. Bexarotene cooperated with ATRA to enhance differentiation in some AML cell lines; however, the combination of bexarotene with the PPARgamma agonist rosiglitazone did not. In contrast, bexarotene combined with liver X receptor (LXR) agonists, T0901317 or GW3965, induced potent differentiation and cytotoxicity in AML cell lines and primary human AML cells, but not in normal progenitor cells. These results suggest that RXR/LXR-regulated gene expression in normal cells is deregulated in AML cells and identifies a potential role for these agonists in differentiation therapy of non-APLs. FAU - Sanchez, P V AU - Sanchez PV AD - Division of Hematology and Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA. FAU - Glantz, S T AU - Glantz ST AD - Division of Hematology and Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA. FAU - Scotland, S AU - Scotland S AD - Division of Hematology and Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA. FAU - Kasner, M T AU - Kasner MT AD - Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA. FAU - Carroll, M AU - Carroll M AD - Division of Hematology and Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia PA, USA. LA - eng GR - K01 CA129151/CA/NCI NIH HHS/United States GR - R01 CA149566/CA/NCI NIH HHS/United States GR - K01-CA-129151/CA/NCI NIH HHS/United States GR - 1R01CA149566/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20130704 PL - England TA - Leukemia JT - Leukemia JID - 8704895 RN - 0 (CCAAT-Enhancer-Binding Protein-alpha) RN - 0 (CCAAT-Enhancer-Binding Proteins) RN - 0 (Hydrocarbons, Fluorinated) RN - 0 (Liver X Receptors) RN - 0 (Nicotinic Acids) RN - 0 (Orphan Nuclear Receptors) RN - 0 (Proto-Oncogene Proteins) RN - 0 (Retinoid X Receptors) RN - 0 (Sulfonamides) RN - 0 (T0901317) RN - 0 (Tetrahydronaphthalenes) RN - 0 (Trans-Activators) RN - 0 (proto-oncogene protein Spi-1) RN - 142805-41-2 (CEBPE protein, human) RN - 5688UTC01R (Tretinoin) RN - A61RXM4375 (Bexarotene) RN - UVU4X1103P (LG 100268) SB - IM MH - Bexarotene MH - CCAAT-Enhancer-Binding Protein-alpha/physiology MH - CCAAT-Enhancer-Binding Proteins/physiology MH - Cell Differentiation/drug effects MH - Cell Line, Tumor MH - Humans MH - Hydrocarbons, Fluorinated/pharmacology MH - Leukemia, Myeloid, Acute/*pathology MH - Liver X Receptors MH - Nicotinic Acids/pharmacology MH - Orphan Nuclear Receptors/*physiology MH - Proto-Oncogene Proteins/physiology MH - Retinoid X Receptors/*physiology MH - Sulfonamides/pharmacology MH - Tetrahydronaphthalenes/pharmacology MH - Trans-Activators/physiology MH - Tretinoin/pharmacology PMC - PMC8835482 MID - NIHMS549959 COIS- Conflict of Interest: M.C. receives research support from Glaxo Smith Kline, Sanofi Aventis Corporation and Tetralogic Pharmaceuticals. EDAT- 2013/07/05 06:00 MHDA- 2014/06/17 06:00 PMCR- 2022/02/11 CRDT- 2013/07/05 06:00 PHST- 2012/06/14 00:00 [received] PHST- 2013/06/20 00:00 [revised] PHST- 2013/06/24 00:00 [accepted] PHST- 2013/07/05 06:00 [entrez] PHST- 2013/07/05 06:00 [pubmed] PHST- 2014/06/17 06:00 [medline] PHST- 2022/02/11 00:00 [pmc-release] AID - leu2013202 [pii] AID - 10.1038/leu.2013.202 [doi] PST - ppublish SO - Leukemia. 2014 Apr;28(4):749-60. doi: 10.1038/leu.2013.202. Epub 2013 Jul 4.