exp‐CAF2‐shENG cells also showed attenuated mRNA expression levels of α and β alternative splicing forms of CXCL12/stromal cell‐derived factor‐1 (SDF‐1; Fig. S5C), which could mediate CAF‐promoted primary tumor growth based on our previous studies [21, 41]. Here, CXCL12 is linked to neoplasm.