Fig. 4From: Mesenchymal stem cell-derived exosomes protect against liver fibrosis via delivering miR-148a to target KLF6/STAT3 pathway in macrophagesMSC-EXO circulated into the liver and co-located with macrophages. A Imaging of DiR-labeled exosomes from different tissues at 24Â h after tail vein injection. B Quantification of the relative fluorescence intensity of the infiltrated exosomes in the tissues in different groups. C DiR-labeled exosome (red) localization in the liver as detected by fluorescence microscopy. Macrophages were F4/80 positive (green). Nuclei were counterstained with DAPIBack to article page