FGF9 and urinary bladder cancer: Overall, the inhibition of miR-140-5p reversed the effects of LINC01140 knockdown on FGF9 expression, bladder cancer phenotype, and macrophage M2 polarization, indicating that miR-140-5p mediates the crosstalk between LINC01140 and FGF9, thus modulating macrophage M2 polarization to affect bladder cancer cell aggressiveness.