1 (5 chloro 2 indolylcarbonyl) 4 methylpiperazine 1 [2 (amidinothio)ethyl]guanidine Apoptosis Base Sequence Blotting, Western Breast Neoplasms Cell Line, Tumor Cell Proliferation Cell Senescence DNA Primers Female G protein coupled receptor HRH4 protein, human Histamine H4 Receptor Human Breast Cancer Humans In Situ Nick-End Labeling Proliferation Receptors, G-Protein-Coupled Receptors, Histamine Reverse Transcriptase Polymerase Chain Reaction Western blotting apoptosis article breast cancer breast tumor cancer cell culture cell aging cell proliferation clobenpropit