Retinoids (Vitamin A, its metabolites and synthetic analogues) play important roles in a variety of biological processes,
including cellular differentiation, proliferation and apoptosis. The many diverse actions of retionids attribute to the ability of regulating transcription of different target genes through activation of multiple retinoid nuclear receptors (RAR of RXR). So, retinoids with selective binding ability to specific receptor may not only have improved therapeutic indices, but may also be invaluable for elucidating the
molecular mechanism of retinoidal transcriptional activation. Based on the two
dimensional and three dimensional quantitive structureactivity relationships of specific ligands of RXR, we carried out mimesis of enviroment of ligands interacting with their receptor and, to some extent, mapping the topological and physicochemical characteristics of receptor. The knowledge of the QSAR study will offer detailed molecular information for design, synthesis and biological evaluation in drug research and development.