Animals 2 Blotting, Western 2 Cell Growth Processes 2 DNA synthesis 2 Dopaminergic D2 receptor 2 Enzyme-Linked Immunosorbent Assay 2 Extracellular Signal-Regulated MAP Kinases 2 Extracellular signal-regulated kinase phosphorylation 2 Female 2 Fibroblast Growth Factor 2 2 Fibroblast growth factor receptor-1 2 Hyperplasia 2 Immunohistochemistry 2 Mice 2 Mice, Inbred C57BL 2 Mice, Knockout 2 Microscopy, Confocal 2 Microscopy, Fluorescence 2 Phosphorylation 2 Pituitary Gland, Anterior 2 Prolactin 2 Prolactinoma 2 Receptor, Fibroblast Growth Factor, Type 1 2 Receptors, Dopamine D2 2 Western blotting 2 animal cell 2 animal cell culture 2 animal experiment 2 animal model 2 animal tissue 2