Notch1 co-transfection partially reversed the effects of CSF2 on MSC phenotype and function, including the tropism towards gastric cancer cells (Fig. 6A), the enhanced FAP and α-SMA expression (Fig. 6B, C), and the secretion of GM-CSF, FGF, and PDGF-BB (Fig. 6D). Here, NOTCH1 is linked to gastric cancer.