Animals 6 Mice 6 Phosphorylation 6 Receptor, erbB-2 6 Tumor Cells, Cultured 6 animal cell 6 article 6 cell proliferation 6 controlled study 6 neu differentiation factor 6 nonhuman 6 oncogene neu 6 priority journal 6 protein phosphorylation 6 Animalia 4 Enzyme Activation 4 Epithelial Cells 4 ErbB receptors 4 Female 4 Macromolecular Substances 4 Mammary Neoplasms, Experimental 4 Mammary tumorigenesis 4 Medroxyprogesterone 17-Acetate 4 Mice, Inbred BALB C 4 Mink cell focus-forming virus 4 Oligodeoxyribonucleotides, Antisense 4 Progesterone Congeners 4 Progestin 4 Receptor Cross-Talk 4 Receptor, IGF Type 1 4