35 (link) Briefly, we crossed the breast cancer‐resistant C57BL/6 mouse strain (C57) with an FVB/N‐Tg(MMTVneu)202Mul/J susceptible strain (FVB). F1‐Neu+ males generated with the transgene were mated with FVB non‐transgenic females to obtain a backcrossed cohort of MMTV‐ErbB2 mice (BX‐Neu+) (N = 147). The concentration of tail DNA was measured using a Nanodrop ND‐1000 Spectrophotometer and used for genotyping.
35 (link)
Tumour cells from BX‐Neu+ mice were transplanted into F1 female recipients and 100 μL of a single‐cell suspension containing 2−5 × 106 cells was injected into both inguinal flanks of each mouse. Each tumour was transplanted into two individuals (N = 125). Chemotherapy was initiated when the tumour diameter reached 12 mm by treating 58 mice with docetaxel (25 mg/kg; Taxotere, Sanofi Aventis) and 69 mice with doxorubicin (5 mg/kg; Farmiblastina, Pfizer), and each drug was injected intraperitoneally (IP). Docetaxel and doxorubicin were administered every 8 and 10 days, respectively, and the mice were sacrificed when the tumour reached 25 mm in diameter or 2 months after the end of the treatment.