CXCR4 and cancer: The circular RNA circDLG1 promotes GC progression and anti-PD-1 resistance through the regulation of CXCL12 by sponging miR-141-3p (346)Cancer-associated fibroblasts in GC affect malignant progression via the CXCL12-CXCR4 axis (347)miR-1273h-5p suppresses CXCL12 expression and inhibits GC cell invasion and metastasis (348)MicroRNA-200b-3p restrains GC cell proliferation, migration, and invasion via C-X-C motif chemokine ligand 12/CXC chemokine receptor 7 axis (349)