Additionally, peonidin‐3‐glucoside has demonstrated selective antitumor effects on HER2‐positive breast cancer cells by inhibiting cell proliferation and inducing apoptosis through the modulation of HER2, AKT, and MAPK signaling pathways, effectively reducing tumor growth without significant toxicity to normal cells (Liu et al. 2013). The gene discussed is ERBB2; the disease is breast cancer.