Through database analysis, we found a significantly downregulated DNAJB4 expression in breast cancer, bladder urothelial carcinoma, colon adenocarcinoma, kidney chromophobe and so on (Fig. 1A), and DNAJB4 protein level was also decreased in breast cancer tissues and different subclasses (Fig. 1D, E). Here, DNAJB4 is linked to breast carcinoma.