To further detect whether this polypeptide CAPG-171aa plays a role in promoting the growth of TNBC, we subcutaneously implanted stably expressed OE-CAPG-171aa MDA-MB-231 cell line into BALB/c nude mice, and the results showed that OE-CAPG-171aa promotes tumor growth (Fig. S4G and H). Here, CAPG is linked to neoplasm.