MALAT1 and gastric cancer: To verify the functional roles of exosomal MALAT1 from M2‐polarized macrophages, we collected exosomes from M2‐polarized macrophages transfected with si‐Ctrl (SI‐NC) and si‐MALAT1 (SI‐M1 and SI‐M2), and used them to treat gastric cancer cells.