title: Inhibitory effects of retinoids on development of squamous metaplasia in rat mammary epithelial organoids cultured in Matrigel.
abstract: Squamous metaplasia (SQM) developed in cultures of rat mammary organoids in reconstituted basement membrane, Matrigel, under either a complete hormone medium (CHM) or a serum-free mammary epithelium growth medium (MEGM). Organoids cultured in CHM gave rise to fewer such SQM (approximately 5%) than those in MEGM (approximately 16%). Formation of SQM was completely suppressed when retinoids were added to CHM. However, a few SQM were still observed in cultures in MEGM with added retinoids. Addition of 5% fetal bovine serum suppressed development of SQM cultured in MEGM. Delayed addition of retinoids also inhibited further development of SQM. Development of SQM from mammary epithelial cells is not common, and regulatory molecules other than retinoids apparently are involved in their formation and prevention.
authors.affiliation: Department of Human Oncology, University of Wisconsin Comprehensive Cancer Center K4/330, Madison 53792, USA.
authors.forename: N D
authors.initials: ND
authors.lastname: Kim
authors.forename: K J
authors.initials: KJ
authors.lastname: Paik
authors.forename: K H
authors.initials: KH
authors.lastname: Clifton
mesh_terms: D000818:Animals; D002417:Cattle; D003094:Collagen; D004338:Drug Combinations; D005109:Extracellular Matrix; D005260:Female; D005312:Fetal Blood; D007797:Laminin; D008321:Mammary Glands, Animal / Q000473:pathology*; D008679:Metaplasia / Q000517:prevention & control; D009940:Organoids / Q000187:drug effects* / Q000473:pathology; D011509:Proteoglycans; D051381:Rats; D011916:Rats, Inbred F344; D012176:Retinoids / Q000494:pharmacology*
chemical_list: D004338:Drug Combinations; D007797:Laminin; D011509:Proteoglycans; D012176:Retinoids; C059485:matrigel; D003094:Collagen