SLC37A2 and colitis: In addition, human umbilical cord-derived mesenchymal stem cell exosomes (hucMSC-Ex) have been shown to alleviate colitis in mice by enhancing M2 macrophage polarization via the METTL3–solute carrier family 37 member 2 (Slc37a2)–YTHDF1 axis, thereby suppressing pro-inflammatory macrophage activity.76