糖尿病视网膜病变血浆与眼内液血管内皮生长因子的相关研究

目的 通过检测糖尿病性视网膜病变(DR)患者血浆、眼内液(房水、玻璃体)血管内皮生长因子(VEGF)含量，探讨其在DR发展变化中 的作用。 方法 采用双抗体夹心酶联免疫吸附试验ELISA法定量检测患者组及对照组血浆、房水、玻璃体VEGF含量。 结果 无糖尿病性视网膜病变(NDR)组血浆VEGF含量(34.47±1.76) pg/ml ，单纯型糖尿病性视网膜病变(BDR)组血浆VEGF含量(53.93±3.08) pg/ml，增生型糖尿病性视网膜病变(PDR)组血浆VEGF含量(53.36±3.28) pg/ml，对照组血浆VEGF含量(178.30±10.13) pg/ml，与实验组比较差异均有显著性的意义(P＜0.05)；PDR组房水VEGF含量(184.86±1260) pg/ml，对照组房水VEGF含量(90.06±18.32) pg/ml，两者比较差异有显著性的意义(P＜0.05)；PDR组玻璃体VEGF含量(741.70±92.02) pg/ml，对照组玻璃体VEGF含量(94.38±21.21) pg/ml，两者比较差异有显著性的意义(P＜0.05)。PDR组血浆VEGF与房水、玻璃体VEGF无相关关系(P＞0.05)，玻璃体VEGF与糖化血红蛋白(HbA1c)有正相关关系(r=0.9067,P＜0.01)。 结论 糖尿病患者血浆VEGF含量较正常人低，但与房水、玻璃体VEGF含量无关；增生型糖尿病性视网膜病变患者房水与玻璃体VEGF含量增高，玻璃体内VEGF含量增高与患者HbA1c值有关。 (中华眼底病杂志，2004，20：343-345)     

糖尿病视网膜病变血浆与眼内液血管内皮生长因子的相关研究

目的　通过检测糖尿病性视网膜病变 (DR)患者血浆、眼内液 (房水、玻璃体 )血管内皮生长因子 (VEGF)含量 ,探讨其在 DR发展变化中的作用。　方法　采用双抗体夹心酶联免疫吸附试验 EL ISA法定量检测患者组及对照组血浆、房水、玻璃体 VEGF含量。　结果　无糖尿病性视网膜病变 (NDR)组血浆 VEGF含量 (34.4 7± 1.76 ) pg/ ml ,单纯型糖尿病性视网膜病变 (BDR)组血浆 VEGF含量 (5 3.93±3.0 8) pg/ ml,增生型糖尿病性视网膜病变 (PDR)组血浆 VEGF含量 (5 3.36± 3.2 8) pg/ ml,对照组血浆VEGF含量 (178.30± 10 .13) pg/ ml,与实验组比较差异均有显著性的意义 (P<0 .0 5 ) ;PDR组房水 VEGF含量 (184 .86± 12 .6 0 ) pg/ ml,对照组房水 VEGF含量 (90 .0 6± 18.32 ) pg/ ml,两者比较差异有显著性的意义 (P<0 .0 5 ) ;PDR组玻璃体 VEGF含量 (74 1.70± 92 .0 2 ) pg/ ml,对照组玻璃体 VEGF含量 (94 .38±2 1.2 1) pg/ ml,两者比较差异有显著性的意义 (P<0 .0 5 )。 PDR组血浆 VEGF与房水、玻璃体 VEGF无相关关系 (P>0 .0 5 ) ,玻璃体 VEGF与糖化血红蛋白 (Hb A1c)有正相关关系 (r=0 .90 6 7,P<0 .0 1)。　结论　糖尿病患者血浆 VEGF含量较正常人低 ,但与房水、玻璃体 VEGF含量无关 ;增生型糖尿病性视网膜病     

VEGF,IL-6,leptin水平测定在2型糖尿病患者房水中的临床意义

目的:检测2型糖尿病患者眼房水中血管内皮生长因子(vascular endothelial growth factor,VEGF)、白细胞介素-6(interleukin-6,IL-6)和瘦素(leptin)的含量,并探讨其临床意义。方法:对70例70眼2型糖尿病患者房水中VEGF和IL-6的含量采用双抗体夹心酶联免疫吸附法检测,leptin含量采用放射免疫法检测。根据散瞳眼底检查和眼底荧光素血管造影检查,将实验组分为:无糖尿病性视网膜病变组22例22眼、单纯型糖尿病性视网膜病变组28例28眼、增生型糖尿病性视网膜病变组20例20眼,对照组为健康的老年性白内障患者20例20眼。结果:3组房水VEGF的含量分别为(250.32±26.77),(300.11±58.89),(496.23±91.06)ng/L,IL-6含量分别为(162.81±33.92),(256.76±64.15),(391.27±90.46)ng/L,leptin含量分别为(69.80±21.37),(155.08±32.76),(230.27±56.92)ng/L,对照组房水VEGF含量为(144.69±26.55)ng/L、IL-6含量为(86.71±22.69)ng/L,leptin含量为(43.62±20.02)ng/L,对照组与实验组比较差异均有统计学意义(F=118.62,P<0.01;F=110.53,P<0.01;F=101.22,P<0.01)。对照组、NDR,BDR与PDR组房水VEGF,IL-6,leptin含量有依次增加的趋势。房水中VEGF与IL-6,leptin含量有相关性(r=0.995,P<0.01;r=0.776,P<0.01);房水中VEGF,IL-6,leptin含量与糖尿病患者的病程及糖尿病性视网膜病变的严重程度有相关性(r=0.722,P<0.01;r=0.716,P<0.01)(r=0.869,P<0.01;r=0.865,P<0.01)(r=0.776,P<0.01;r=0.765,P<0.01)。结论:VEGF,IL-6,leptin在糖尿病性视网膜病变的形成过程中有重要作用,且VEGF与IL-6,VEGF与leptin之间有相关性。     

2型糖尿病患者房水中VEGF、IL-6、Leptin水平测定的临床意义

目的 检测2型糖尿病患者眼房水中血管内皮生长因子(vascular endothelial growth factor,VEGF)、白细胞介素-6(interleukin-6,IL-6)和瘦素(Leptin)的含量,并探讨其临床意义.方法 对70例70眼2型糖尿病患者房水中VEGF和IL-6的含量采用双抗体夹心ELISA法检测,Leptin含量采用放射免疫法检测.根据散瞳眼底检查和眼底荧光素血管造影检查,将实验组分为无糖尿病性视网膜病变组22例22眼、单纯型糖尿病性视网膜病变组28例28眼、增生型糖尿病性视网膜病变组20例20眼,对照组为健康的老年性白内障患者20例20眼.结果 3组实验组房水VEGF的含量分别为(250.32±26.77) ng·L-1、(300.11±58.89) ng·L-1、(496.23±91.06) ng·L-1,IL-6含量分别为(162.81±33.92) ng·L-1、(256.76±64.15) ng·L-1、(391.27±90.46) ng·L-1,Leptin含量分别为(69.80±21.37) ng·L-1、(155.08±32.76) ng·L-1、(230.27±56.92) ng·L-1,对照组房水VEGF含量为(144.69±26.55) ng·L-1、IL-6含量为(86.71±22.69) ng·L-1,Leptin含量为(43.62±20.02) ng·L-1,对照组与实验组比较差异均有统计学意义(F=118.62,P＜0.01;F=110.53,P＜0.01;F=101.22,P＜0.01).对照组、无糖尿病性视网膜病变组、单纯型糖尿病性视网膜病变组与增生型糖尿病性视网膜病变组房水VEGF、IL-6、Leptin含量有依次增加的趋势.房水中VEGF与IL-6、Leptin含量有相关性(r=0.995,P=0.000;r=0.776,P=0.000);房水中VEGF、IL-6、Leptin含量与糖尿病患者的病程及糖尿病视网膜病变的严重程度有相关性(r=0.722,P=0.000;r=0.716,P=0.000)、(r=0.869,P=0.000;r=0.865,P=0.000)、(r=0.776,P=0.000;r=0.765,P=0.000).结论 VEGF、IL-6、Leptin在糖尿病视网膜病变的形成过程中有重要作用,且VEGF与IL-6、VEGF与Leptin之间有相关性.     

增生性糖尿病视网膜病变患者房水及血清IL-1β与IL-1Ra含量分析

目的 探索增生性糖尿病视网膜病变（proliferative diabetic retinopathy,PDR）患者房水及血清白介素1β（IL-1β）、白介素1受体拮抗剂（IL-1Ra）与血管内皮生长因子（VEGF）水平的变化及其意义。设计 前瞻性比较性病例系列。研究对象 36例PDR患者与26例非糖尿病白内障患者（对照组）。方法 采集患者外周血,并于白内障摘除术或玻璃体切除术中抽取未稀释的房水。采用免疫磁珠多重因子检测方法分析房水与血清中IL-1β、IL-1Ra、VEGF含量。比较两组细胞因子含量的差异。主要指标 房水与血清中IL-1β、IL-1Ra、VEGF含量。结果 PDR组房水中的IL-1β（6.7±4.3 pg/ml）和IL-1Ra（657.9 ± 445.6 pg/ml）含量均高于对照组（3.3±3.2 pg/ml和300.8 ± 368.0 pg/ml,P均=0.001）;血清中的IL-1β（7.6±4.6 pg/ml）和IL-1Ra（437.8±270.2 pg/ml）含量亦高于对照组（4.9±3.7 pg/ml和279.2±226.7 pg/ml,P均=0.02）。两组房水及血清中VEGF含量差异均无统计学意义。两组房水或血清中IL-1β含量均与各自同一样本中IL-1Ra的含量呈高度正相关。PDR组房水与血清中的IL-1β（r=0.50,P=0.003）、房水与血清中的IL-1Ra（r=0.66,P<0.001）含量均为正相关,但房水与血清中的VEGF含量之间无明显相关（r=-0.06,P=0.72）。结论 PDR患者房水与血清中炎症因子升高的同时伴随抗炎因子的代偿性增高。针对炎症反应的调控可能为DR的治疗开拓新的思路。血清中炎症因子与抗炎因子水平可能作为DR发生的生物标志物。（眼科,2021, 30： 449-452）     

糖尿病性视网膜病变患者房水中VEGF与IGF-1的定量测定及分析

目的:探讨糖尿病视网膜病变(DR)程度与房水中VEGF、IGF-1含量之间的关系。方法:研究对象共44例,分为正常对照组(A组)、糖尿病患者无视网膜病变组(NDR组)(B组)、糖尿病性视网膜病变组(DR组)(C组),其中C组又分为单纯型糖尿病性视网膜病变组(BDR组)(C1组)和增殖型糖尿病性视网膜病变组(PDR组)(C2组)。对所有研究对象均收集房水标本。对标本均采用双抗体夹心ABC-ELISA法进行人VEGF和人IGF-1定量ELISA测定。结果:随着糖尿病的进展及DR的逐渐加重,房水中VEGF浓度呈明显增加趋势。房水IGF-1:对照组(A组)、NDR组(B组)、DR组(C组)各组间P<0.01,呈明显增高趋势。BDR组(C1组)与PDR组(C2组)间P<0.01,呈明显增高趋势。房水VEGF与房水IGF-1二者有显著正相关性(P<0.01)。结论:VEGF是影响糖尿病眼底微血管病变发生、发展的重要刺激因子;眼内IGF-1参与了DR进展的病理进程;在DR的发生发展过程中,IGF-1与VEGF有协同作用。     

VEGF在PDR中的表达及作用的研究

目的:研究增殖性糖尿病视网膜病变(proliferative diabetic retinopathy,PDR)患者血液、房水、玻璃体中血管内皮生长因子(vascular endothelial growth factor,VEGF)含量的变化,探讨VEGF与PDR的关系,为抗VEGF药物治疗的给药途径及剂量等提供理论依据。方法:采用双抗体夹心酶联免疫吸附测定法定量检测无糖尿病视网膜病变(NDR)组,单纯性糖尿病视网膜病变(BDR)组,增殖性糖尿病视网膜病变(PDR)组患者和正常对照组血浆中VEGF含量,还检测PDR患者房水、玻璃体中和正常对照组房水、玻璃体中VEGF含量,并进行综合分析。试剂盒购自美国R&D公司,其质量和灵敏度相对较高。结果:PDR组房水中VEGF含量有增高趋势,但与正常对照组比较,无统计学差异(P>0.05)。PDR患者玻璃体中VEGF含量明显增高,与正常对照组比较差异非常显著(P<0.01)。PDR组自身血浆、房水、玻璃体中VEGF含量比较有逐渐增高趋势,三者之间有显著性差异(P<0.01)。正常对照组血浆、房水、玻璃体中VEGF含量三者之间无显著性差异(P>0.05)。血浆VEGF含量在正常对照组中最高,而玻璃体中VEGF含量在PDR患者中最高。结论:PDR患者眼内尤其是玻璃体中VEGF含量大幅度增高,可能对促进DR发展恶化起了关键性的作用。在正常人,VEGF更多地存在于血浆中发挥其生物学效应。在严重DR患者中,玻璃体中异常地出现大量VEGF,推测来自缺血缺氧的视网膜,并可能有向眼前段扩散的趋势。     

新生血管性青光眼患者房水和血浆中VEGF、TGF-β1和IL-6的测定及意义

背景 新生血管性青光眼(NVG)以虹膜和房角新生血管为主要特征,发病机制尚未完全阐明.研究证实多个细胞因子和炎性因子与新生血管的形成有关,但这些细胞因子与NVG的关系研究尚不完全清楚. 目的 探讨NVG患者房水和血浆中血管内皮生长因子(VEGF)、转化生长因子β1(TGF-p1)和白细胞介素-6(IL-6)质量浓度的变化及其意义.方法 采用前瞻性病例对照研究方法,纳入2014年5月至2015年3月于上海市东方医院确诊的NVG患者8例8眼、原发性开角型青光眼(POAG)患者10例10眼及年龄相关性白内障(ARC)患者10例10眼.眼部手术前1d收集患者空腹肘静脉血3～4 ml,离心后取上清液0.3～0.4 ml,于眼部手术时收集房水0.1 ～0.2 ml,采用ELISA法分别检测患者房水及血浆中VEGF、TGF-β1和IL-6质量浓度,对检测结果进行组间比较. 结果 NVG组患者房水和血浆中VEGF质量浓度分别为(2 769.85±390.88) pg/ml和(529.93±95.20) pg/ml,明显高于POAG组的(208.12±58.59) pg/ml和(219.28 ±24.44) pg/ml及ARC组的(158.88±12.35) pg/ml和(172.82±31.91) pg/ml,组间总体比较差异均有统计学意义(房水:F=433.80,P＜0.01;血浆:F=103.84,P＜0.01).NVG组患者房水和血浆中TGF-β1质量浓度分别为(157.94±113.00) pg/ml和(3 895.78±2 318.00) pg/ml,明显高于POAG组的(54.48±35.58) pg/ml和(2 196.13±1 185.39)pg/ml以及ARC组的(47.98±17.69) pg/ml和(1 937.28±933.27) pg/ml,组间总体比较差异有统计学意义(房水:F=7.88,P＜0.01;血浆:F=4.18,P＜0.05).NVG组房水和血浆中IL-6质量浓度分别为(234.87±41.64) pg/ml和(26.97±8.19) pg/ml,明显高于POAG组的(38.97±19.06) pg/ml和(19.54±5.11) pg/ml以及ARC组的(29.48±14.61) pg/ml和(18.50±3.57) pg/ml,组间总体比较差异均有统计学意义(房水:F=166.27,P＜0.01;血浆:F=5.59,P＜0.05). 结论 NVG患者房水及血浆中VEGF、TGF-β1、IL-6质量浓度明显高于POAG及ARC患者,提示3种细胞因子均参与NVG的发生及虹膜新生血管的形成,可能成为NVG治疗的靶点.     

血清及房水中VEGF、IL-6水平与新生血管性青光眼的相关性研究

目的测定新生血管性青光眼（NVG）患者血清及房水中血管内皮生长因子（VEGF）、白细胞介素-6（IL-6）的水平,探讨VEGF、IL-6在NVG发生发展中的作用。方法选取NVG患者20例（20只眼）作为实验组（A组）,原发性慢性闭角型青光眼患者（B组）、老年性白内障患者（C组）各20例（20只眼）作为对照组。采集3组患者血清及房水标本,通过双抗体夹心酶联免疫吸附试验（ELISA法）分别检测血清与房水中VEGF、IL-6的水平。结果 （1）A组房水中VEGF、IL-6的水平（1336.80±70.15）pg/ml、（691.15±50.09）pg/ml明显高于B组（311.60±31.06）pg/ml、（168.25±11.95）pg/ml和C组（165.75±13.95）pg/ml,（92.10±9.59）pg/ml,3组间两两比较,差异均具有统计学意义（F=4019.334,P〈0.01;F=2275.019,P〈0.01）。A组血清中VEGF、IL-6的水平（545.40±155.49）pg/ml、（291.35±22.66）pg/ml高于B组（321.15±52.57）pg/ml、（104.35±13.21）pg/ml和C组（176.30±20.38）pg/ml、（87.00±12.70）pg/ml,3组间两两比较,差异均具有统计学意义（F=75.940,P〈0.01;F=906.947,P〈0.01）。（2）A组房水中VEGF与IL-6的水平呈显著的正相关性,差异具有统计学意义（r=0.857,P〈0.01）。其余各组标本中无显著的相关性（P〉0.05）。结论 NVG患者房水及血清中VEGF、IL-6的水平明显高于对照组,且房水中二者水平呈明显正相关,提示在NVG病理机制过程中,VEGF、IL-6作为促血管生成因子,相互促进、相互影响,共同导致了NVG的发生和发展。     

超敏C反应蛋白及血同型半胱氨酸与2型糖尿病视网膜病变的关系

目的探讨2型糖尿病患者血同型半胱氨酸(homocysteine,Hcy)、超敏C反应蛋白(high sensitive C-reactive protein,hsCRP)水平同糖尿病视网膜病变(diabetic retinopathy,DR)之间的关系。方法将212例2型糖尿病患者分为3组:无糖尿病视网膜病变组(NDR)102例,背景型糖尿病视网膜病变组(BDR)66例,增生性糖尿病视网膜病变组(PDR)44例;分别测定各组间的Hcy和hsCRP水平,并对血脂、空腹胰岛素(FINS)、胰岛素敏感指数(ISI)、病程(HI)、体质量指数(BMI)、总胆固醇(TC)、甘油三酯(TG)、空腹血糖(FBG)、空腹胰岛素(FINS)、胰岛素敏感指数(ISI)等参数进行测定,比较各组参数的差异及DR和Hcy、hsCRP的相关性。结果 BDR组、PDR组hsCRP和Hcy显著高于NDR组(均为P<0.01),PDR组hsCRP、Hcy也高于BDR组(均为P<0.05),DR同hsCRP、Hcy、HI、TC(r值分别为0.615、0.556、0.356、0.252,P值分别为<0.01、<0.01、<0.05、<0.05)呈正相关,PDR组hsCRP与TG、FINS、HI(r值分别为0.552、0.452、0.382,P值分别为<0.01、<0.01、<0.05)呈正相关,与ISI呈负相关(r=-0.512,P<0.01);PDR组Hcy与TG、TC、FBG、BMI(r值分别为0.752、0.652、0.512、0.432,均为P<0.01)呈正相关,与ISI呈负相关(r=-0.312,P<0.01);PDR组Hcy水平与hsCRP呈正相关(r=0.344,P<0.05)。结论 2型糖尿病伴DR者Hcy和hsCRP水平升高,PDR患者Hcy和hsCRP较BDR患者升高。Hcy和hsCRP可能是DR的危险因素,高Hcy可能使CRP水平升高进而引起DR。     

糖尿病视网膜病变患者房水VEGF和IL-6水平的测定及其临床意义

目的 探讨糖尿病视网膜病变(DR)程度与房水中血管内皮生长因子(VEGF)和白细胞介素-6(IL-6)含量之间的关系.方法 采用双抗体夹心酶联免疫吸附(EIISA)法,测定88例房水中VEGF和IL-6的含量,根据散瞳眼底检查和眼底荧光素血管造影检查后,实验组分为:无糖尿病视网膜病变组(NDR)21例、单纯型糖尿病性视...     

Comparison of the levels of hepatocyte growth factor and vascular endothelial growth factor in aqueous fluid and serum with grades of retinopathy in patients with diabetes mellitus.

AIMS: To determine the relation between the stages of diabetic retinopathy (DR) and the levels of hepatocyte growth factor (HGF) and vascular endothelial growth factor (VEGF) in aqueous fluid and serum. METHODS: Levels of HGF and VEGF in serum and aqueous humour obtained during ocular surgery were measured by enzyme linked immunosorbent assay in 58 diabetic patients with 32 non-diabetic patients (NDM) as controls. The patients with diabetes were classified into three groups according to the stage of DR: no DR (NDR; 15 cases), non-proliferative DR (NPDR; six cases), and proliferative DR (PDR; 37 cases). RESULTS: No significant differences were found between any of the groups in serum concentrations of HGF or VEGF. The aqueous HGF levels increased with the stage of DR: NDM, median 397 pg/ml, range 133-930 pg/ml; NDR, 371 pg/ml, 142-1536 pg/ml; NPDR, 455 pg/ml, 162-1007 pg/ml; and PDR, 638 pg/ml, 187-2222 pg/ml. The aqueous VEGF levels in PDR (median 212 pg/ml, range 14-1216 pg/ml) were significantly higher than in NDM (105 pg/ml, 9-203 pg/ml), but aqueous HGF concentrations were unrelated to those of VEGF. CONCLUSION: The results of the present study suggest that both HGF and VEGF present in the ocular tissues may play important roles in the progression of DR.     

Possible involvement of nitric oxide in the progression of diabetic retinopathy

Abnormal nitric oxide (NO) synthesis has been implicated in the pathogenesis of diabetes mellitus. The aim of our study was to elucidate the relationship between the stages of diabetic retinopathy (DR) and the NO levels in aqueous humor and plasma. Using the chemiluminescence assay, we measured the concentrations of NO in aqueous humor and plasma samples obtained during intraocular surgery from 45 diabetic patients and 19 nondiabetic cataract patients. The patients with diabetes were classified into 4 groups: proliferative DR (PDR) with active neovascularization (active PDR; 9 cases), PDR with quiescent neovascularization (regressed PDR; 6 cases), background DR (BDR; 16 cases) and no DR (14 cases). We found that the aqueous NO levels (mean +/- SE) of the active PDR group (83.2 +/- 13.9 microM) were significantly higher than those of the BDR group (45.8 +/- 6.0 microM, p = 0.049) and the diabetics without DR (33.3 +/- 5.2 microM, p = 0.011), and, although not statistically significantly, they were also higher than those of the regressed PDR group (52.1 +/- 10.3 microM, p = 0.224). However, no significant differences were observed between any of the diabetic subgroups in the plasma NO levels (p = 0.345). We therefore concluded that NO present in the ocular tissues may play important roles in the progression of DR.     

Increased melatonin levels in aqueous humor of patients with proliferative retinopathy in type 2 diabetes mellitus

AIM: To report the association between melatonin levels in aqueous humor and serum, and diabetic retinopathy (DR) grade in type 2 diabetic patients. METHODS: Aqueous humor and plasma samples from 26 patients with DR (in nonproliferative and proliferative stages) and 14 control subjects were collected during cataract surgery after 6 p.m. Melatonin concentrations were determined using an enzyme-linked immunosorbent assay (ELISA). RESULTS: Melatonin levels were significantly higher in the aqueous humor of patients with proliferative diabetic retinopathy (PDR) [18.57±2.67 pg/mL (range 15.20-23.06) vs 13.63±2.71 pg/mL (range 10.20-20.20), P=0.0001], but not in those with nonproliferative retinopathy (NPDR) [13.79±2.56 pg/mL (range 9.80-20.10) vs 13.63±2.71 pg/mL (range 10.20-20.20), P=0.961] compared to controls. There was decrement in the plasma melatonin level of patients with PDR, but no significant differences between the plasma melatonin levels of the study groups [5.37±1.74 pg/mL (range 2.85-8.65) vs 6.11±1.90 pg/mL (range 3.13-9.41), P=0.293], or between control and DR groups [NPDR 6.11±1.90 pg/mL (range 3.13-9.41) vs control 6.15±1.91 pg/mL (range 2.18-9.86); PDR (5.37±1.74 pg/mL (range 2.85-8.65) vs control 6.15±1.91 pg/mL (range 2.18-9.86), P=0.808, P=0.264]. CONCLUSION: Elevated melatonin levels in aqueous humor in PDR may indicate the level to be associated with DR severity.     

Unbalanced vitreous levels of pigment epithelium-derived factor and vascular endothelial growth factor in diabetic retinopathy

PURPOSE: To determine the levels of pigment epithelium-derived factor (PEDF) and vascular endothelial growth factor (VEGF) in the vitreous of patients with diabetic retinopathy (DR). DESIGN: Experimental study of PEDF and VEGF levels in vitreous samples collected during vitrectomy. METHODS: The levels of PEDF and VEGF were measured by enzyme-linked immunosorbent assay in the vitreous of 46 eyes of 43 patients who underwent vitrectomy with diabetic retinopathy (DR) (32 eyes of 29 patients) and an idiopathic macular hole (MH) (14 eyes of 14 patients). RESULTS: The vitreal concentration of PEDF was significantly lower at 1.11 +/- 0.14 microg/ml (mean +/- standard error) in eyes with DR than in eyes with MH at 1.71 +/- 0.22 microg/ml (P =.021). The VEGF level was 1799 +/- 478 pg/ml in eyes with DR and not detectable in MH. The PEDF level in proliferative DR (PDR) (0.94 +/- 0.12 microg/ml) was lower than that in nonproliferative DR (NPDR) (2.25 +/- 0.32 microg/ml), and that in active DR (0.85 +/- 0.14 microg/ml) was significantly lower than that in inactive DR (1.59 +/- 0.24 microg/ml; P =.01). The VEGF level was 2025 +/- 533 pg/ml in PDR and 215 +/- 201 pg/ml in NPDR and that in active DR (2543 +/- 673 pg/ml) was significantly higher than that in inactive DR (395 +/- 188 pg/ml; P =.0098). CONCLUSIONS: These results suggest that lower levels of PEDF and higher levels of VEGF may be related to the angiogenesis in DR that leads to active PDR.     

HMGB-1在DR患者房水及血浆中水平变化分析

目的:观察糖尿病性视网膜病变(diabetic retinopathy,DR)患者房水和血浆中高迁移率族蛋白-1(high-mobility groupbox-1,HMGB-1)的变化及其临床意义。方法:以西安交通大学第一附属医院眼科2010-08/12住院糖尿病(diabets mellitus,DM)患者为研究对象,按有无DR分为糖尿病无视网膜病变(non-diabetic retinopathy,NDR)组及DR组。DR组按病程分为单纯性糖尿病性视网膜病变(background diabetic retinopathy,BDR)组及增殖性糖尿病性视网膜病变(proliferative diabetic retinopathy,PDR)组。设正常对照组,对研究对象分别收集房水和血浆标本,共收集房水28例,血浆40例,均采用双抗体夹心ABC-ELISA法进行人HMGB-1定量ELISA测定。结果:DM患者房水中的HMGB-1浓度明显高于对照组(P<0.05),DM患者按DR病程分组时,HMGB-1浓度未见明显差异(P>0.05)。DM患者血浆中HMGB-1浓度与对照组比较未见明显差异(P>0.05)。结论:HMGB-1在DR的发生中可能起到重要作用,但与DR的病理进程无明显关系。