Adrenocorticotropic Hormone Animals 1 Bone Morphogenetic Proteins 1 Gene Expression 1 Humans 1 Models, Biological 1 Neurons 1 Pituitary Diseases 1 Pituitary Gland 1 Receptors, Transforming Growth Factor beta 1 Transforming Growth Factor beta 1 Tretinoin 1 animal 1 biological model 1 bone morphogenetic protein 1 bone morphogenetic protein 4 1 conference paper 1 corticotropin 1 cytology 1 gene expression 1 growth, development and aging 1 human 1 hypophysis 1 hypophysis disease 1 metabolism 1 nerve cell 1 physiology 1 retinoic acid 1 secretion 1 transforming growth factor beta 1