LPS和PMA对人眼晶状体上皮细胞增殖和EGFR表达的影响

目的：观察人晶状体上皮(HLE)细胞表皮生长因子受体（EGFR）的表达，探讨脂多糖（LPS）和佛波醇酯（PMA）对HLE细胞增殖及EGFR表达的影响。方法：应用免疫组织化学方法检测年龄相关性白内障的HLE细胞组织及培养的胎儿HLE细胞EGFR蛋白表达,RT-PCR方法检测EGFR mRNA表达； 0.5、1.0、2.0 mg?L^-1的LPS及25、50、100 nmol?L^-1 PMA作用培养的HLE 细胞48 h后，MTT法检测细胞增殖率，RT-PC方法检测EGFR mRNA表达。结果：免疫组织化学和RT-PCR检测结果显示,年龄相关性白内障的HLE细胞及培养的胎儿HLE细胞中EGFR蛋白及mRNA呈阳性表达；0.5、1.0和2.0 mg?L^-1 LPS对HLE细胞的增殖率分别为（3.21±0.42）%、（12.25±1.34）%和（36.67±3.65）%，2.0 mg?L^-1LPS组与其他两组比较差异有显著性（F=7.709，P<0.01），并使EGFR mRNA表达增加；25、50和100 nmol?L^-1PMA各组组间比较，PMA对HLE细胞的增殖率差异无显著性（P>0.05），对EGFR mRNA表达无影响。结论:LPS通过促进EGFR表达使HLE细胞增殖从而促进后发性白内障（PCO）的发生。  

Effects of LPS and PMA on proliferation of human len epithelial cells and expression of epidermal growth factor receptor in human len epithelial cells

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).