ABSTRACT
Objective To compare and analyze the time of cell eruption formation and the rate of cell eruption of human corneal epithelial cells cultured by different explant culture methods under serum-free conditions.Methods Explant tissues were randomly divided into A,B,C and D groups.In A group,the cornea epithelial cells were put side up after stripping corneal endothelium and scraping the corneal epithelium;in B group,the corneal epithelium was put side down after stripping corneal endothelium and scraping the corneal epithelium;in C group,the corneal epithelium was put side up after only stripping corneal endothelium;and in D group,the corneal epithelium was put side down after only stripping corneal endothelium.The morphological changes of the cells in the 4 groups were observed by phase-contrast microscope,and both aforementioned variable were recorded.Results The average time of cell eruption formation and the rate of cell eruption in A,B,C and D group was (7.00 ± 3.00) d and 47.50％ (19/40),(7.55 ±2.58)d and 45.83％ (11/24),(8.43 ±3.32)d and 63.64％ (14/22),(7.49 ± 2.20) d and 72.22％ (39/54),respectively.The chi-square test showed that there was significant difference in the cell eruption rate between A and D group as well as B and D group (all P ＜ 0.05),but there was no significant difference between the other groups (all P ＞ O.05).Conclusion The time of cell eruption formation in the four different explant culture methods was about one week in free-serum conditions.And D group has higher cell eruption rate,and pure plus stable cultured cells when compared with the other three groups.