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. 2021 May 17;21:218. doi: 10.1186/s12886-021-01946-y

Fig. 1.

Fig. 1

Insulin enhances the cell viability of ARPE-19 cells. Cell morphology (a) and cell viability (b) of ARPE-19 cells treated with insulin at different concentrations (0, 0.1, 1 µg/mL) for 72 h. The red arrows point to floating dead cells. *p < 0.05, ***p < 0.001 vs.. the insulin-free group; ##p < 0.01 vs.. the 1 µg/mL of insulin treatment group. Scale bar: 100 μm