CCDC102B and breast cancer: To investigate the role of CCDC102B in breast cancer migration and metastasis, we analyzed the expression of CCDC102B in breast cancer cells (Supplementary Figure 3A) and developed three CCDC102B-overexpressing stable breast cancer cell line models (MDA-MB-231, BT549, and MDA-MB-231 LM2) for in vitro and in vivo studies.