RESUMO
ObjectiveTo detect the features of dopamine secretion of cultured bovine retinal pigmentary epithelial(RPE) cells. The level of dopamine and survival rate after passage and microencapsulation were also observed. MethodsThe primary culture of bovine RPE cells was made using enzyme digestion. After purification and identification the growth curve of the cell was observed. Alginate-polylysine-alginate(APA) microencapsulated cells were made with a high voltage electostatic system. The activity of the cells in the mirocapsule was investigated by trypan blue staining. The secretion of dopamine was determined by high performance liquid chromatography (HPLC) assay. ResultsThe cell had high purity of immunocytochemistry. The growth curve showed that the exponential growth occurred at the first 1~4 days. Dopamine content was first detected at the time point of 2 hour, and arrived at the peak at about 48 hour of the cultivation. The secretion of dopamine was not different between passages. Dopamine secretion was dramatically decreased in the first 4 days after microencapsulation (P