Figure 5From: Retinal pigment epithelial cells secrete neurotrophic factors and synthesize dopamine: possible contribution to therapeutic effects of RPE cell transplantation in Parkinson's diseaseHPLC analysis of the synthesis and release of DA by RPE cells.(A) HPLC analysis of standard of DA, 3,4-dihydroxyphenylacetic acid (DOPAC) and HVA. (B) HPLC analysis of RPE cells homogenate. The peaks of DA and HVA in the RPE cells were detected but the DOPAC signal was weak. (C) HPLC analysis of high potassium solution incubated with RPE cells.Back to article page