Chromans; Fenofibrate; Semaphorins; Thiazolidinediones; Humans; Alitretinoin; Blotting, Western; Breast Neoplasms/genetics; Breast Neoplasms/metabolism; Breast Neoplasms/pathology; Cell Line; Cell Line, Tumor; Chromans/pharmacology; Dimerization; Fenofibrate/pharmacology; Gene Expression/drug effects; HT29 Cells; K562 Cells; PPAR alpha/agonists; PPAR alpha/chemistry; PPAR gamma/agonists; PPAR gamma/chemistry; Retinoid X Receptors/agonists; Retinoid X Receptors/chemistry; Reverse Transcriptase Polymerase Chain Reaction; RNA, Messenger/genetics; RNA, Messenger/metabolism; Semaphorins/genetics; Semaphorins/metabolism; Thiazoles/pharmacology; Thiazolidinediones/pharmacology; Tretinoin/pharmacology; Troglitazone