关键词: 表皮生长因子受体, 脂多糖, 佛波醇酯

Abstract: Objective To observe the effects of LPS and PMA on proliferation of human len epithelial( HLE )cells and expression of epidermal growth factor receptor(EGFR) in HLE cells. Methods The expressions of EGFR protein of HLE cells from felus,adult lens age-related cataract and cultured HLE cells were detected by immunohistochemical staining.The expression of EGFR mRNA was detected by RT-PCR.The effects of LPS (0.5,1.0,2.0 mg•L^-1 ) and PMA(25,50,100 nmol•L^-1 )on proliferation of HLE cells were detected by MTT colorimetry method,and the EGFR mRNA expression in HLE cells was determined by RT-PCR. Results The expressions of EGFR　 protein and mRNA were positive in HLE cells from felus,adult lens age-related cataract and cultured HLE cells.The proliferation rates of HLE cells treated with 0.5,1.0,2.0 mg•L^-1 LPS were （3.21±0.42）%,（12.25±1.34）% and （36.67±3.65）%,respectively.The proliferation rate of HLE cells in 2.0 mg•L^-1 LPS group was higher than those in 0.5 and 1.0 mg•L^-1 LPS groups（F=7.709，P<0.01）. 2.0 mg•L^-1 LPS increased the expression of EGFR mRNA.There was no significant difference in proliferation rate between 25,50 and 100 nmol•L^-1PMA groups(P>0.05).PMA(25,50,100 nmol•L^-1)could not effect the expression of EGFR mRNA in HLE cells . Conclusion Inflammation stimulant factor such as LPS can promote the proliferation of HLE cells by increasing the expression of EGFR and result in occurrence of posterior capsular opacifition(PCO).

Key words: epidermal growth factor receptor, lipopolysaccharides, phorbol myristate acetare