FSTL1 and breast cancer: The findings observed in this study allowed for the researchers to establish that dysregulations in the miRNA-137/FSTL1/integrin β3/Wnt/β-catenin signaling axis in BC are involved in the regulation of various processes related to the proliferation, differentiation, and migration of BCSCs, as well as chemotherapy resistance in the case of TNBC [123].