Addition of CSN to culture promoted IEC proliferation and growth of IEC, which had completely reached confluence on 10th day, wherever control still had nonconfluent areas on 10th day.

• 添加CSN培养孔中细胞的增殖更加明显,该孔细胞在第10天时已完全汇合成片,而未添加孔细胞在第10天时还有未完全汇合区域;