Figure 2

Dil-labeled normal human LSC-derived EVs can be internalized by human primary LEC, HCEC and organ-cultured corneas. Dil-labeled LSC-derived Exos (25 μg/ml or 3 × 108/ml) were incubated (direct addition of Dil-labeled Exos) with organ-cultured corneas, primary LEC and HCEC for 24 h, no Exo was added to the control. Dil-labeled normal keratocytes were co-cultured up to 48 h on trans-wells. The cells were stained with calcein-AM, which exhibits green fluorescence and demonstrates live cells and their uptake of EVs.