NID1 and neoplasm: Cytokines, crucial regulators of cell–cell signaling, play critical roles in modulating the tumor microenvironment.[27] To identify cytokines secreted by EV‐NID1‐stimulated lung fibroblasts, a cytokine array was employed to measure the expression of cytokines in MRC‐5 cells treated with CTL‐KD‐ or NID1‐KD‐EVs.