Fig. 5From: Periostin drives extracellular matrix degradation, stemness, and chemoresistance by activating the MAPK/ERK signaling pathway in triple–negative breast cancer cellsPeriostin promotes the tolerance of TNBCs toward paclitaxel chemotherapy. a–b. A CCK–8 assay was used to determine cell proliferation in MDA–MB–231 and SUM159PT cells under the indicated conditions. c–d. A CCK–8 assay was used to determine the cellular viability when MDA–MB–231 and SUM159PT cells were treated with 3 µg/ml PTX under the indicated conditions. *P < 0.05Back to article page