Fig. 6From: Exosomes derived from three-dimensional cultured human umbilical cord mesenchymal stem cells ameliorate pulmonary fibrosis in a mouse silicosis modelTracking hucMSC-Exos in vitro. Dil red fluorescent dye (Dil: excitation = 549 nm; emission = 565 nm) was used to label the hucMSC-Exos. Hoechest blue fluorescent dye was applied to label the cell nucleus. BF, bright fieldBack to article page