摘要
背景 血小板源性生长因子（PDGF）可以影响人晶状体上皮细胞（LECs）的增生过程,而LECs可终生表达PDGF-α受体（PDGFR-α）,PDGFR-α活化后与PDGF结合能促进细胞的DNA合成.反义寡核苷酸（ASODN）技术沉默PDGFR-α基因表达可抑制增生性玻璃体视网膜病变（PVR）过程中视网膜色素上皮（RPE）细胞的增生,并诱导细胞凋亡,但通过该技术是否能够抑制LECs的增生鲜见报道. 目的 研究PDGFR-α沉默对LECs增生的影响,为防治晶状体后囊膜混浊（PCO）提供实验依据.方法 用含胎牛血清的改良型α-MEM培养液体外培养人LECs系SRA01/04细胞株并传代,转染前1d用无抗生素的培养基培养细胞至30％ ～ 50％融合后将细胞以5×104个/孔的密度接种于6孔板,接种24 h后采用脂质体进行LECs转染,按照转染物的不同分为空白对照组（不加PDGFR-α ASODN的空白脂质体）、PDGFR-α错义寡核苷酸（MSODN）组（含PDGFR-α ASODN和脂质体）、0.5μmol/L PDGFR-α ASODN组（含0.5 μmol/L PDGFR-αASODN和脂质体）和1.0μmol/L PDGFR-α ASODN组（含1.0 μmol/L PDGFR-α ASODN和脂质体）.转染24 h后倒置显微镜下观察各组人LECs的形态学变化,采用逆转录PCR（RT-PCR）法检测各组LECs中PDGFR-αmRNA的表达；用MTT比色法检测各组细胞的增生（A490）值,计算转染物对LECs的抑制率；采用流式细胞仪分析各组LECs的细胞周期. 结果 转染后24 h,空白对照组及PDGFR-α MSODN组LECs生长良好,细胞呈多边形,数目多；而PDGFR-α ASODN组细胞呈圆形,细胞数目明显减少.RT-PCR检测表明,空白对照组及PDGFR-α MSODN组PDGFR-α mRNA在LECs中的表达较强,而在PDGFR-α ASODN组中的表达强度明显减弱,以1.0 μmol/L PDGFR-α ASODN组更为明显.空白对照组、PDGFR-α MSODN组、0.5μmol/L PDGFR-αASODN组及1.0μmol/L PDGFR-α ASODN组的A490值分别为0.661±0.036、0.655 ±40.016、0.529±0.030和0.441 ±0.039,其中0.5μmol/L PDGFR-α ASODN组及1.0μmol/L PDGFR-α ASODN组的A490值明显低于空白对照组和PDGFR-α MSODN组,总体比较差异有统计学意义（F=34.08,P＜0.01）.空白对照组、PDGFR-αMSODN组、0.5 μmol/L PDGFR-α ASODN组及1.0 μmol/L PDGFR-α ASODN组G1期细胞百分数分别为（47.73±1.18）％、（49.48±1.09）％、（53.31±1.30）％和（59.98±0.95）％,总体比较差异有统计学意义（F=68.41,P＜0.01）,其中0.5 μmoL/L PDGFR-αASODN组及1.0 μmol/L PDGFR-α ASODN组G1期细胞百分数明显高于空白对照组,差异均有统计学意义（P＜0.05）. 结论 PDGFR-α沉默能抑制人LECs的增生.
Background Platelet-derived growth facto（PDGF） affectthe proliferation of human lenepithelial cell（LECs）,and human LECexpresPDGF-α recepto（PDGFR-α） throughoutheilifetime.The binding of activated PDGF-α receptowith PDGF promotethe synthesiof DNA.Othestudiedemonstrated thasilencing of PDGFR-α by antisense oligodeoxynucleotide（ASODN） inhibitthe growth of RPE cellin proliferative vitreoretinopathy （PVR）,buwhethethitechnique ifeasible foLECiunclear.Objective Thistudy wato investigate the effecof the knockdown of the PDGFR-α on the proliferation of human LECin vitro,and to offean experimental basifothe gene therapy of posteriocapsule opacification.MethodHuman LECstrain SRA01/ 04 wacultured in α-MEM containing fetal bovine serum.The cellwere incubated in 6-well platea5 × 104 cells/ well and transfection of ASODN-containing liposome waperformed.The cellwere divided into the blank control group （with blank liposome）,PDGFR-α missense oligodeoxynucleotide（MSODN） group （with PDGFR-α MSODN ＋ liposome）,0.5 μmol/L PDGFR-α ASODN group （with 0.5 μmol/L PDGFR-α ASODN＋liposome） and 1.0 μmol/L PDGFR-α ASODN group （with 1.0 μ mol/L PDGFR-α ASODN＋liposome）.The morphology of LECwaexamined undean inverse microscope 24 houraftetransfection.The expression of PDGFR-α mRNin the cellwadetected by reverse transcription-PC（RT-PCR）.The rate of proliferation （A490） of the cellwaassayed using Mtand the inhibitory rate of PDGFR-α ASODN on proliferation wameasured.The percentage of LECin G1 phase waanalyzed by flow cytometer.ResultThe LECgrew well and exhibited polygonal shape in the blank control group and PDGFR-α MSODN group 24 houraftetransfection.Buin the 0.5 μmol/L and 1.0 μmol/L PDGFR-α ASODN groups,the cellappeared round in shape and the numberof cellwere obviously decreased.The expression of PDGFR-α mRNdetected by RT-Pcdemonstrated highelevel in the blank control group and PDGFR-α MSODN group;however,the PDGFR-α mRNexpression waobviously lowein the 0.5 μmol/L and 1.0 μmol/L PDGFR-α ASODN groups.The A490 value wa0.661 ± 0.036,0.655 ± 0.016,0.529 ± 0.030 and 0.441 ± 0.039 in the blank control group,PDGFR-α MSODN group,0.5 μmol/L PDGFR-α ASODN group and 1.0 μmol/L PDGFR-α ASODN group,respectively,showing significandecline in the 0.5 μmol/L PDGFR-α ASODN group and 1.0 μ mol/L PDGFR-α ASODN group in comparison with the blank control group （F=34.08,P〈0.01）.The percentageof LECin G1 phase were （47.73±1.18）%,（49.48±1.09）%,（53.31±1.30）% and （59.98±0.95） % in the blank control group,PDGFR-α MSODN group,0.5 μmol/L PDGFR-α ASODN group and 1.0 μmol/L PDGFR-α ASODN group,showing significandifference among them （F =68.41,P〈0.01）,and thain the 0.5 μmol/L PDGFR-α ASODN group o1.0 μmol/L PDGFR-α ASODN group showed significantly increase in comparison with the blank control group （P〈0.05）.ConclusionPDGFR-α silencing could inhibithe proliferation of human LECin vitro.
出处
《中华实验眼科杂志》
CAS
CSCD
北大核心
2013年第8期749-753,共5页
Chinese Journal Of Experimental Ophthalmology
关键词
血小板源性生长因子-α受体
反义寡核苷酸
晶状体上皮细胞
细胞转染
增生
Platelet-derived growth factor-c~ receptor
Antisense oligonucleotides
Lens epithelial cell
Cell transfection
Proliferation
