Additive and synergistic effects of a novel antiestrogen, toremifene (Fc-1157a), and human interferons on estrogen responsive MCF-7 cells in vitro.
The effect of human interferons alpha and gamma alone and in combination with a novel antiestrogen toremifene were studied in vitro using MCF-7 cell line, an estrogen receptor positive and antiestrogen sensitive cell line. The effects were evaluated by a simple bioluminescence method with which the number of living cells was obtained as cellular adenosine triphosphate (ATP) content. The growth of MCF-7 cells was inhibited both by interferon alpha and interferon gamma. At least additive effect was evident when the cells were exposed to combination of interferons and toremifene: the combination was additive with interferon gamma + toremifene and synergistic with interferon alpha + toremifene. The combination of toremifene and interferons may have clinical importance.
Kangas
L
L
Nieminen
A L
AL
Cantell
K
K
D000255:Adenosine Triphosphate / Q000032:analysis; D001943:Breast Neoplasms / Q000378:metabolism / Q000473:pathology*; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D004347:Drug Interactions; D004357:Drug Synergism; D004965:Estrogen Antagonists / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007370:Interferon Type I / Q000494:pharmacology; D007371:Interferon-gamma / Q000494:pharmacology; D007372:Interferons / Q000494:pharmacology*; D011960:Receptors, Estrogen / Q000378:metabolism*; D013629:Tamoxifen / Q000031:analogs & derivatives* / Q000494:pharmacology; D013997:Time Factors; D017312:Toremifene
D004965:Estrogen Antagonists; D007370:Interferon Type I; D011960:Receptors, Estrogen; D013629:Tamoxifen; D017312:Toremifene; D007371:Interferon-gamma; D000255:Adenosine Triphosphate; D007372:Interferons