PARP‐1, the founding member of the PARP superfamily, has been demonstrated to regulate the growth of various tumor cells, such as breast cancer, ovarian cancer, and NPC (Chen, Zhao, et al., 2015; Franzese et al., 2019; Nur Husna, Tan, Mohamud, Dyhl‐Polk, & Wong, 2018). Here, PARP1 is linked to breast cancer.