摘要目的 观察传统激光与阈值下微脉冲激光光凝对增生型糖尿病视网膜病变(PDR)患眼玻璃体液中VEGF、IL-33、一氧化氮(NO)浓度的影响.方法 病例对照研究.2015年11月在中部战区总医院眼科临床检查确诊的PDR患者39例39只眼和特发性黄斑皱褶(IMP)患者11例11只眼纳入研究.依据就诊顺序按照随机排列表方法将PDR患者分为氪激光治疗组(A组)、阈值下微脉冲激光治疗组(B组)、未行任何激光治疗组(C组),分别为15、13、11只眼.IMP患者作为对照组(D组).4组患者年龄(F=0.53,P=0.23)、性别构成(x2=0.55,P=0.91)、体重指数(F=2.62,P=0.07)、糖尿病病程(F=0.29,P=0.75)、糖化血红蛋白(F=1.72,P=o.19)比较,差异均无统计学意义.PDR患眼激光光凝治疗前均行FFA检查.所有息眼均行常规经睫状体平坦部三切口25G玻璃体切割手术;手术中抽取患眼玻璃体液,二喹啉甲酸法检测总蛋白浓度,ELISA测定玻璃体液中VEGF、IL-33、NO浓度.结果 A、B、C、D组总蛋白浓度比较,差异无统计学意义(F=1.78,P=0.17).与C组VEGF浓度比较,A、B组均降低,差异有统计学意义(F=7.84,P=0.00).与C组IL-33浓度比较,A组升高(t=4.15,P=0.02),B组无差异(t=1.34,P=0.20);A组IL-33浓度高于B组,差异有统计学意义(t=3.89,P=0.00).与D组NO浓度比较,A、B、C组均升高,差异有统计学意义(F=38.42,P＜0.001);A、B、C组间差异无统计学意义(F=3.29,P=0.06).结论 传统激光与阈值下微脉冲激光光凝均可降低PDR患眼玻璃体液中VEGF浓度,且阈值下微脉冲激光光凝引起更少的IL-33表达.

abstractsObjective To analyze the expression of VEGF,IL-33 and NO concentration after laser photocoagulation and subthreshold micropulse laser photocoagulation conventional in proliferative diabetic retinopathy (PDR) patients.Methods A case control study.The clinical data of 39 patients of PDR and 11 patients of idiopathic macular pucker (IMP) from Department of Ophthalmology,Central Theater General Hospital during November 2015 were collected in this study.PDR patients were assigned randomly into three groups.Fifteen PDR patients with 15 eyes were treated with conventional laser as group A.Thirteen PDR patients with 13 eyes were treated with subthreshold micropulse laser as group B.Eleven PDR patients with 11 eyes without any laser therapy were grouped as C.Eleven IMP patients were grouped as D.There was no difference of age (F=0.53,P=0.23),gender ratio (x2=0.55,P=0.91),body mass index (F=2.62,P=0.07),duration diabetes (F=0.29,P=0.75),glycoslated hemglobin (F=1.72,P=0.19) in four groups.All PDR patients were examined with FFA.Total protein was quantified by a bicinchoninic acid assay kit.Levels of VEGF,IL-33,NO were determined using enzyme-linked immunosorbent assay kits.Results There was no difference of total protein in four groups (F=1.78,P=0.17).Group C had a higher VEGF level than group A and B (F=7.84,P=0.002).Group A had a higher IL-33 level than group C (t=4.15,P=0.02).There was no difference of IL-33level in group B and C (t=1.34,P=0.20).Group D had a lower NO level than group A,B,C (F=38.42,P＜0.001).There was no difference of NO level in group A,B and C (F=3.29,P=0.06).Conclusions Both conventional laser photocoagulation and subthreshold micropulse laser photocoagulation can decrease vitreous VEGF level and subthreshold micropulse laser photocoagulation can induce less IL-33 level.