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Departments of Medicine, Surgery, and Pharmacology, Tulane University Health Sciences Center, New Orleans, Louisiana 70112
The MCF-7 cell line was derived from a patient with metastatic breast cancer in 1970. Since then it has become a prominent model system for the study of estrogen receptor–positive breast cancer. With this model as a focus, this review summarizes important studies addressing tumor necrosis factor-
as a prototypical apoptosis-inducing cytokine in MCF-7 cells. Both survival and death receptor signaling pathways are discussed in terms of their role in chemotherapy-induced apoptosis as well as in chemoresistance. Novel therapeutic approaches to the treatment of breast cancer are proposed utilizing knowledge of these signaling pathways as targets. Specifically, ceramide metabolism is proposed as a novel target for chemosensitivity, perhaps combined with selective inhibitors of Bcl-2 or PI3K/Akt/nuclear factor-
B. Suggested areas of future research include translational studies manipulating candidate survival and death signaling pathways.
Key Words: MCF-7 cells • tumor necrosis factor- • ceramide • chemoresistance • apoptosis
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