Novel anti-apoptotic effect of the retinoblastoma protein: implications for polyamine analogue toxicity.
The retinoblastoma protein (pRb) pathway is frequently altered in breast cancer cells. pRb is involved in the regulation of cell proliferation and cell death. The breast cancer cell line L56Br-C1 does not express pRb and is extremely sensitive to treatment with the polyamine analogue N (1),N (11)-diethylnorspermine (DENSPM) which causes apoptosis. Polyamines are essential for the regulation of cel
