CCL4 and Hepatic fibrosis: In a mouse model of liver fibrosis induced by C-C Motif Chemokine Ligand 4 (CCL4), exosomes derived from mesenchymal stem cells (MSCs) carrying miR-26a were shown to promote ferroptosis in hematopoietic stem cells (HSCs) and regulate SLC7A11 expression, thereby alleviating liver fibrosis (Cao et al., 2024).