GPT and breast carcinoma: In comparison, IQcs 2d and 3e, but not 2a, showed a 5–10 fold decrease in effect against the breast carcinoma cell line MCF7 (2.40 < IC50 < 11.40 μM), the telomerase-negative human lung fibroblast ALT line (1.93 < IC50 < 7.11 μM) and lung fibroblastsWI-38 lines (4.86 < IC50 < 10.8 μM).