AIM: To investigate the effect of fetal bovine serum (FBS) on the proliferation and differentiation of murine corneal epithelial cells in vitro.METHODS: Mouse corneal epithelial cells(MCEs) were cultured in serum-free low-Ca2+ medium(KSFM) and KSFM supplemented with 100mL/L FBS, respectively. Population doublings (PDs) were determined. The expressions of corneal epithelial cell markers p63, keratin 19 (K19) and involucrin were investigated by RT-PCR and Western blotting analyses. RESULTS: Cells in KSFM were stably subcultured over 25 passages; however, none of the cell lines could pass P3 in KSFM with FBS. In KSFM, the cells showed typical cobblestone appearance and expressed p63, K19 and involucrin. After medium was supplemented with FBS, cells became homogeneous, large and squamous. Furthermore, both RT-PCR and Western blotting analyses showed that the expression of involucrin was increased significantly.CONCLUSION: FBS has effects of inhibiting proliferation and triggering differentiation of MCEs.%目的:探讨胎牛血清对小鼠角膜上皮细胞生长和分化的影响.方法:分别在无血清低钙培养基(KSFM)和含100mL/L胎牛血清的KSFM中培养小鼠角膜上皮细胞.比较两种培养基中角膜上皮细胞的群体倍增(PD).通过RT-PCR和Western blotting方法检测p63、角蛋白19以及involucrin的表达.结果:在KSFM中,小鼠角膜上皮细胞可稳定传代超过25代,但在含胎牛血清的培养基中,细胞仅能存活3代.在KSFM中,培养细胞呈典型铺路石样外观,RT-PCR和Western blotting结果显示细胞表达p63、角蛋白19以及involucrin.当培养基中加入胎牛血清后,细胞形态明显增大,呈扁平状; involucrin表达显著增强.结论:胎牛血清可抑制小鼠角膜上皮细胞增生、诱导其分化.
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