Animalia 1 Animals 1 Enzyme Activation 1 Epithelial Cells 1 ErbB receptors 1 Female 1 Macromolecular Substances 1 Mammary Neoplasms, Experimental 1 Mammary tumorigenesis 1 Medroxyprogesterone 17-Acetate 1 Mice 1 Mice, Inbred BALB C 1 Mink cell focus-forming virus 1 Oligodeoxyribonucleotides, Antisense 1 Phosphorylation 1 Progesterone Congeners 1 Progestin 1 Receptor Cross-Talk 1 Receptor, IGF Type 1 1 Receptor, erbB-2 1 Signal Transduction 1 Tumor Cells, Cultured 1 Type I insulin-like growth factor receptor 1 Tyrosine 1 animal cell 1 animal experiment 1 animal model 1 animal tissue 1 antisense oligodeoxynucleotide 1 article 1