Fig. 1: CAFs enhance PTX resistance in BC cells.

A Immunofluorescence analysis of α-SMA, FAP, and S100A4 expression in fibroblasts. Scale bar = 50 μm. B, C Western blot analysis of FAP, α-SMA, and S100A4 expression in fibroblasts (n = 3). D Co-culture system established using CM from fibroblasts and BC cell lines. E CCK-8 assay to evaluate cell viability in BC cells (n = 3). Data are expressed as the mean ± S.D. for all panels: ns = no significance, *P < 0.05, **P < 0.01, ***P < 0.001.