摘要目的 探讨血小板衍生生长因子(platelet-derived growth factor,PDGF)-B血浆水平及PDGF-B基因rs1800818、rs1800817单核苷酸多态性(single nucleotide polymorphism,SNP)与支架内再狭窄(in-stent restenosis,ISR)发生的关系. 方法 157例支架术后复查冠状动脉造影患者,分为再狭窄组(ISR组,74例)和无再狭窄组(NISR组,83例).酶联免疫吸附法(ELISA)检测血浆PDGF-B生物活性形式PDGF-BB水平、探针法实时定量聚合酶链式反应(PCR)检测PDGF-B基因型. 结果 ISR组与NISR组rs1800818 AA、AG、GG基因型频率差异无统计学意义(x2=4.48,P＞0.05),ISR组A等位基因频率高于NISR组(0.446比0.319,x2=5.33,P＜0.05).未检出rs1800817 CC基因型,两组间AA、AC基因型频率差异无统计学意义(x2=0.06,P＞0.05),A、C等位基频率差异无统计学意义(x2=0.06,P＞0.05).血浆PDGF-BB水平ISR组高于NISR组(6.53±3.65) ng/L与(5.07±2.45)ng/L(t=2.92,P＜0.01).两组间rs1800818AA基因型PDGF-BB水平分别为(9.94±4.60)ng/L与(5.90±2.98)ng/L,差异有统计学意义(t=2.69,P＜0.05).Logistic回归分析示血浆PDGF-B水平(OR=1.187,95％ CI:1.054～1.337,P＜0.01)是ISR发生的危险因素. 结论 高血浆PDGF-B水平是ISR的危险因素,PDGF-B基因SNP rs1800818、rs1800817与ISR发生无关.

abstractsObjective To investigate the association of platelet-derived growth factor(PDGF)-B gene single nucleotide polymorphism(SNP) and plasma PDGF-BB level with in-stent restenosis(ISR) in elderly patients.Methods 157 patients who had undergone coronary artery stenting for more than half year were divided into ISR group(n=74) and NISR group(non-ISR,n=83) according to the angiographic diagnosis of in-stent restenosis (ISR).Plasma level of PDGF-BB was measured by enzyme-linked immunosorbent assay(ELISA).DNA was isolated from leukocytes.Two SNPs of the PDGF-B gene(rs1800818 and rs1800817) were determined by Taqman Quantitative Real-Time PCR with TaqMan-MGB probe.Results There were no significant differences in genotype frequency of rs1800818 AA,AG,GG between ISR group and NISR group(x2 =4.48,P＞0.05).The frequency of rs1800818A allele was much higher in ISR group than in NISR group(x2 =5.33,P＜0.05).There were no significant differences in genotype frequency of SNP rs1800817 AA and AC(x2 =0.06,P＞ 0.05) and allele frequency of SNP rs1800817 A and C(x2 =0.06,P＞0.05) between ISR group and NISR group,while genotype CC was not found.The plasma level of PDGF-BB was higher in ISR group than in NISR group [(6.53±3.65) ng/L vs.(5.07±2.45) ng/L,t=2.92,P＜0.01].Plasma level of PDGF-BB in patients with rs1800818 AA genotype was significantly higher in ISR group than in NISR group [(9.94 ± 4.60) ng/L vs.(5.90 ± 2.98) ng/L,t =2.69,P＜0.05].Multivariable logistic regression analysis showed that plasma PDGF-BB level was the risk factor for ISR (OR =1.187,95.0％ CI:1.054 1.337,P＜0.01).Conclusions High plasma PDGF-BB level is the risk factor for ISR,but PDGF-B gene SNPs rs1800818 and rs1800817 are not associated with the occurrence of ISR.