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GLP-1 does not affect ARPE-19 cell viability. Cells were cultured for 24, 72, or 96 hours in the absence (CTR, white bars) or presence of 10 nmol/L GLP-1 (GPL-1, black bars). Cell proliferation rate was determined by a colorimetric method based on the formazan product of the tetrazolium compound MTS. Results showed the percentage of absorbance compared to CTR. Data were expressed as the mean ± SE of 3 independent experiments.
