PMID- 27320335 OWN - NLM STAT- MEDLINE DCOM- 20170208 LR - 20190907 IS - 1873-4294 (Electronic) IS - 1568-0266 (Linking) VI - 17 IP - 6 DP - 2017 TI - Natural and Structure-based RXR Ligand Scaffolds and Their Functions. PG - 631-662 AB - Retinoid X receptors (RXRs) are promiscuous partners of heterodimeric associations with other members of the Nuclear Receptor (NR) superfamily. Through these liaisons RXR ligands ("rexinoids") either transcriptionally activate on their own the "permissive" subclass of heterodimers (PPAR/RXR, LXR/RXR, FXR/RXR) or synergize with partner ligands in the "non-permissive" subclass of heterodimers (RAR/RXR, VDR/RXR and TR/RXR). The nature and extent of the interaction of the ligand-receptor complexes with co-regulators, which is cell and context-dependent, results ultimately in transcriptional modulation of cognate gene networks. RXR modulators hold therapeutical potential for the treatment of cancer and other diseases related to nutrient acquisition and disposal, among them metabolic diseases. A rexinoid (bexarotene) has indeed reached the clinic for the treatment of cutaneous T-cell lymphoma. The modulation of RXR function by rexinoids acting as agonists, parcial agonists, inverse agonists or antagonists is encoded in the structure of the ligandreceptor complexes. A very large number of rexinoids with a wide structural diversity has been published. In addition to natural products and other ligands discovered by HTS or mere serendipity, most rexinoids have been rationally designed based on the structures of existing complexes with RXR determined by X-Ray or based on Molecular Modeling. Although the structural rationale for the modulation of the ligand-receptor complexes is reasonably well understood, it has not yet been possible to predict the correlation between ligand structure and physiological response, particularly in the case of heterodimer-selective rexinoids. FAU - Dominguez, Marta AU - Dominguez M FAU - Alvarez, Susana AU - Alvarez S FAU - de Lera, Angel R AU - de Lera AR AD - Departamento de Quimica Organica, Facultade de Quimica, CINBIO and IBIV, Universidade de Vigo, Campus As Lagoas-Marcosende, 36310 Vigo, Spain. LA - eng PT - Journal Article PT - Review PL - United Arab Emirates TA - Curr Top Med Chem JT - Current topics in medicinal chemistry JID - 101119673 RN - 0 (Ligands) RN - 0 (Retinoid X Receptors) SB - IM MH - Animals MH - Humans MH - Ligands MH - Protein Conformation MH - Retinoid X Receptors/chemistry/*physiology EDAT- 2016/06/21 06:00 MHDA- 2017/02/09 06:00 CRDT- 2016/06/21 06:00 PHST- 2015/08/31 00:00 [received] PHST- 2016/02/18 00:00 [revised] PHST- 2016/02/18 00:00 [accepted] PHST- 2016/06/21 06:00 [pubmed] PHST- 2017/02/09 06:00 [medline] PHST- 2016/06/21 06:00 [entrez] AID - CTMC-EPUB-76603 [pii] AID - 10.2174/1568026616666160617072521 [doi] PST - ppublish SO - Curr Top Med Chem. 2017;17(6):631-662. doi: 10.2174/1568026616666160617072521.