复发性单疱病毒性角膜炎实验模型的研究

目的：建立一种可靠、实用的复发性单疱病毒性角膜炎（HSK）的实验模型。方法：用单纯病毒I型（HSV－1）Mckrae株行NIH鼠的角膜接种,用人的抗HSV－1血清行鼠的腹腔内注射,使病毒在三叉神经节或角膜内建立起潜伏感染。用紫外线B光照射鼠的角膜,诱导HSK复发。观察诱导HSK复发的成功率、复发性HSK的临床特征、组织学特点。结果：紫外线照射诱导鼠HSK复发的成功率为72．5％,复发性HSK主要表现为基质型角膜炎,组织切片见角膜基质层内有大量的淋巴细胞和一些中性粒细胞浸润。     

可溶性B、T淋巴细胞衰减因子及其配体在单纯疱疹性角膜基质炎小鼠体内的异常表达

目的 研究B、T淋巴细胞衰减因子(B and T lymphocyte attenuator,BTLA)及其配体疱疹病毒侵入介体(herpes virus entry mediator,HVEM)在单纯疱疹性角膜基质炎(herpetic stromal keratitis,HSK)小鼠角膜组织中及外周血CD4+T细胞上的表达水平,探讨共抑制信号BTLA-HVEM是否参与了CD4+T细胞介导的HSK免疫病理反应.方法 将106 PFU的单纯疱疹病毒Ⅰ型(herpes simplex virus type 1,HSV-1)KOS毒株接种于BALB/c鼠的角膜上建立HSK动物模型,分别于角膜接种病毒前(0 d),接种病毒后的第3、7、10、14、21天,用毛细管取小鼠的左眼眼眶静脉窦血1 mL,分离淋巴细胞,行荧光抗体染色,用流式细胞仪检测CD3+ CD4+ BTLA+T细胞和CD3+ CD4+ HVEM+T细胞阳性率;在裂隙灯显微镜下观察小鼠角膜变化;免疫组织化学方法检测BTLA蛋白及HVEM蛋白在角膜组织中的表达.结果 BALB/c鼠的角膜接种HSV-1后的1～5d,角膜擦拭液中均检测出HSV-1复制,表明小鼠感染了单纯疱疹病毒.裂隙灯显微镜观察显示:角膜接种HSV-1后第3天,所有小鼠均患了急性上皮性角膜炎,并于感染后1周内痊愈,自病毒接种后第8天起,小鼠出现角膜基质炎的改变,表现为角膜基质呈灰白色混浊,角膜基质混浊于病毒接种后的第10天达到高峰,持续至第14天后逐渐减轻.流式细胞仪检测显示,小鼠外周血淋巴细胞中CD3+CD4+BTLA+T细胞和CD3+ CD4+ HVEM+T细胞的阳性率,在角膜接种病毒前(0 d)分别为(3.15±0.60)％和(9.84±1.06)％,在角膜接种病毒后第10天(HSK疾病程度最严重时)分别增加到(20.47±3.15)％和(45.18±3.90)％(与0d相比差异均有显著统计学意义,均为P＜0.01).免疫组织化学方法检查HSK小鼠角膜组织中BTLA和HVEM的蛋白表达结果一致:HSK临床表现最严重时,即病毒接种后第10天时,BTLA蛋白和HVEM蛋白在角膜组织中表达最强,主要表达于角膜基质层内浸润的炎性细胞上,角膜上皮层和内皮层也有表达.结论 在HSK小鼠模型中,BTLA及其配体HVEM蛋白在角膜组织中及外周血CD4+T细胞上表达明显增强,共抑制信号BTLA-HVEM参与了CD4+T细胞介导的HSK的免疫病理过程.     

解毒明目方对鼠复发性单纯疱疹病毒性角膜炎的治疗机制

目的:观察解毒明目方药对鼠复发性单纯疱疹病毒性角膜炎(HSK)血清细胞因子(IL-6、IL-8、IFN-α)水平的影响、检测病毒、观察复发情况,来进一步探讨该药物治疗作用机制。方法:用Balb/c小鼠建立潜伏感染模型,随机分为对照组和治疗组,治疗组使用中药灌胃,对照组使用生理盐水灌胃,两组经紫外线B光(UV-B)照射诱导复发后,角膜刮片检测病毒,处死小鼠取血清检测胞因子(IL-6、IL-8、IFN-α)水平。结果:HSK复发,治疗组角膜炎的发生率较对照组比较有显著差异(P<0.05);与对照组比较血清中IL-6(P<0.05)、IL-8(P<0.01)、IFN-α(P<0.05)。结论:中药解毒明目方可以影响血清中细胞因子(IL-6、IL-8、IFN-α)的水平,使其发挥调整机体免疫功能的作用,可以减轻HSK复发后炎症反应程度。     

单纯疱疹病毒Ⅰ型在三叉神经节潜伏复发机制的研究进展

单纯疱疹病毒Ⅰ型(HSV-1)感染引起的单纯疱疹病毒性角膜炎(HSK)是全球性的致盲性眼病。病毒在眼表发生原发感染后,转运并终生潜伏在三叉神经节内,反复复发引起角膜病变。在对HSV潜伏机制方面的研究过程中,人们逐渐认识到病毒自身和宿主反应两方面共同调控了病毒的潜伏过程。近年来,嗜神经病毒的侵袭、免疫、潜伏复发等各方面的分子机制研究取得大量研究成果,为HSK的防治提供了新思路。本文将主要对HSV-1角膜初发感染后在三叉神经节内潜伏分子机制方面的研究进展进行介绍,并对目前HSK的基础研究和临床治疗存在的问题进行探讨。     

BALB/c小鼠单纯疱疹病毒性角膜炎复发感染模型的建立及鉴定

目的:探索单纯疱疹病毒性角膜炎(HSK)复发模型的建立及鉴定方法。方法:选取12只BALB/c健康小鼠,采用随机数字表法按照紫外灯照射时间不同分为紫外灯照射3 min组、2 min45 s组和2 min30 s组,每组4只,观察角膜损伤情况以确定最适紫外灯照射参数。另取72只BALB/c健康小鼠,采用随机数字表法将其分...     

转录因子T-bet在单纯疱疹病毒感染小鼠外周血中的表达

目的研究单纯疱疹病毒Ⅰ型(herpes si mplex virus type1,HSV-1)感染小鼠眼球以后转录因子T-bet在小鼠外周血中的表达,探讨T-bet的表达与单纯疱疹性角膜基质炎之间的关系。方法将106空斑单位(plague forming unit,PFU)·L-1的HSV-1Mckrae毒株接种于BALB/c鼠的角膜上建立单纯疱疹性角膜基质炎(herpetic stromal keratitis,HSK)动物模型,分别于角膜接种病毒后的第1d、3d、7d、10d、14d、21d及28d,用毛细管取小鼠的左眼眼眶静脉窦血1mL,提取淋巴细胞,用半定量逆转录聚合酶链反应(RT-PCR)检测T-bet mRNA的表达水平;在裂隙灯显微镜下观察小鼠角膜的临床变化,组织学检查角膜的病理改变;用ELISA法检测T-bet蛋白在角膜组织中的表达水平。结果BALB/c鼠的角膜接种HSV-1后的1~5d,角膜擦拭液中均检测出HSV-1复制,表明小鼠感染了单纯疱疹病毒;裂隙灯显微镜观察:HSV-1感染鼠的角膜后,小鼠均患了急性角膜上皮炎,并于感染后1周内痊愈。其中81.7%(49/60)的小鼠自感染病毒后第10d起开始出现角膜基质炎改变,表现为灶状角膜基质混浊,局部角膜新生血管化,角膜基质内大量的炎性细胞浸润。角膜基质混浊逐渐进展,在病毒感染后的第14~21d达到高峰。RT-PCR检测的数据显示:未感染HSV-1的对照组小鼠的外周血中不表达T-bet mRNA;HSV-1感染小鼠的早期即可诱导T-bet mRNA在小鼠外周血中的表达,并且表达持续存在;T-bet mRNA表达的高峰时间(10~28d),位于角膜基质炎发生和发展的过程中。ELISA法检测角膜提取物中的T-bet蛋白显示了相似的结果。结论HSV-1上调T-bet mRNA在小鼠外周血中的表达;T-bet的表达与角膜基质炎的发生和发展密切相关。     

单纯疱疹病毒性角膜炎动物模型制备

单纯疱疹病毒性角膜炎(herpes simplex keratitis,HSK)是由单纯疱疹病毒Ⅰ型(herpessimplex virus type Ⅰ,HSV-1)感染引起的具有高复发率、高致盲率及难根治性特点的疾病,可导致角膜溶解、新生血管形成及溃疡穿孔,是目前角膜病中最常见的致盲眼病之一.本文参考目前国内外实验研究时使用的各种HSK动物模型建模方法来进行综述,如建立原发感染模型的划痕法、环钻法、外植体培养法以及潜伏感染模型和诱导复发模型的建立方法.力求探索如何建立一种可靠的HSK动物模型,在为研究人类HSK发病机制、药物治疗和对比以及角膜移植等方面均有重要意义.     

细胞因子在鼠复发性单纯疱疹性角膜基质炎角膜组织中的表达

目的探讨CD4^ T辅助细胞1型(Th1)和T辅助细胞2型(Th2)分泌的细胞因子在鼠复发性单纯疱疹性角膜基质炎(HSK)角膜组织中的表达水平,及其与复发性HSK的关系。方法制备复发性HSK的BALB／c鼠模型,用紫外线B光照射鼠的角膜诱导HSK复发;分别于紫外线照射前,照射后第3、7、10、14、21及28天,取角膜中央直径为2mm的角膜环,用逆转录聚合酶链反应(RT-PCR)检测Th1型细胞因子(IFN-γ、IL-12)和Th2型细胞因子(IL4、IL-10)的表达水平。结果处于病毒潜伏感染期的小鼠经紫外线照射诱导病毒复发后,角膜基质混浊于紫外线照射后的7～14d达到高峰;在此期间,IFN-γ、IL-12、IL-10和IL-4mRNA在角膜组织中均有表达。其中,IFN—γ和IL-10在临床疾病的发生、发展过程中(病毒激活后第3～14天)高表达,在疾病恢复期(14d后)表达减弱,与角膜基质混浊程度密切相关;IL-12是角膜组织内表达最丰富的细胞因子,在病毒激活后的第3天即开始高表达,高表达持续经过整个观察期;IL-4在病毒激活后的第3～14天有明显表达。结论在复发性HSK的角膜损伤早期,Th1型细胞因子和Th2型细胞因子同时表达于角膜组织中,与T细胞的免疫记忆性有关。IL-10的表达趋势平行于IFN-γ的表达,其表达水平与HSK的疾病程度密切相关。复发性HSK无法严格区分是由Th1细胞介导的还是由Th2细胞介导的,角膜的损伤与修复可能依赖于损伤性细胞因子和保护性细胞因子在病毒复发位置上的平衡。     

贝伐单抗对小鼠单纯疱疹病毒性角膜炎角膜新生血管和瘢痕形成的抑制作用

背景 单纯疱疹病毒性角膜炎(HSK)可诱导发生角膜新生血管和炎症反应,传统的治疗药物为阿昔洛韦(ACV),研究已证实贝伐单抗具有抑制新生血管的作用,但其是否对HSK发挥治疗作用值得研究. 目的 研究贝伐单抗对小鼠HSK角膜瘢痕和新生血管的抑制作用.方法 利用体外培养并感染的Vero细胞生产单纯疱疹病毒Ⅰ型(HSV-1),以无血清DMEM培养基于冰上对HSV-1进行10倍梯度稀释后制备成HSV-1液.选用SPF级雄性6～8周龄C57 BL/6小鼠200只,用0.6μl滴度为l×l0 7空斑形成单位(PUF)/ml的HSV-1行小鼠角膜基质注射以制备HSK模型,将模型眼分为单纯ACV注射组、ACV+贝伐单抗注射组和生理盐水注射组,按照分组分别于感染后5、8、11和14d选择角膜混浊评分为1分的模型眼结膜下注射50μg ACV、50 μg ACV+5 μl贝伐单抗和5μl生理盐水.此外采用紫外线照射均有轻度新生血管和瘢痕的6只模型小鼠双眼诱导HSK复发,于复发后0、2、4和6d行5μl贝伐单抗(25 mg/ml)右眼结膜下注射,左眼结膜下注射5 μl生理盐水.于造模后5、7、11、14和17d以及复发的0、2、4和6d行小鼠角膜裂隙灯显微镜检查并用角膜知觉测量仪行中央角膜敏感度检测;制备角膜铺片,采用免疫荧光检测法检测角膜中CD31和βⅢTubulin荧光表达以评估角膜新生血管和角膜神经纤维分布;采用Image J软件测定角膜新生血管面积和瘢痕面积. 结果 HSK成模率达80％以上,造模后7d和复发后2d角膜混浊最重,造模后15 d和复发后2d角膜新生血管面积最大.造模后模型眼中央角膜敏感度逐渐降低,于造模后9d下降到最低.ACV+贝伐单抗注射组角膜病变面积小于单纯ACV注射组,ACV+贝伐单抗注射组小鼠中央角膜敏感度为5.50±0.71,明显高于生理盐水注射组的0.50±1.41,差异有统计学意义(Z=-2.397,P=0.029).ACV+贝伐单抗注射组小鼠角膜病变面积增长率为(167.10±52.53)％,低于生理盐水注射组的(312.30±74.18)％,差异有统计学意义(Z=-1.992,P=0.046).实时荧光定量PCR显示造模后7d,模型眼角膜及同侧三叉神经节(TG)中胸苷激酶(TK)和感染细胞蛋白-27(ICP-27) mRNA相对表达量均较高,造模后45 d明显下降,诱导复发后2d TKmRNA和ICP-27 mRNA均再次升高,复发后7d表达量降至最低.造模后45 d同侧TG中均可见LAT mRNA表达量达峰值,诱导复发后2d相对表达量下降,复发后7d相对表达量再次升高,差异均有统计学意义(均P＜0.01).角膜铺片结果显示,造模后生理盐水注射组小鼠较正常对照小鼠角膜新生血管明显增加,角膜神经纤维明显减少,单纯ACV注射组和ACV+贝伐单抗注射组小鼠角膜新生血管少于生理盐水注射组,ACV+贝伐单抗注射组小鼠角膜神经纤维较生理盐水组注射组和单纯ACV注射组均增加.结论 贝伐单抗结膜下注射可抑制HSK模型小鼠角膜新生血管生成和瘢痕形成,与ACV联合应用时二者有协同作用.     

IL-17在单纯疱疹性角膜基质炎小鼠中表达的变化

目的:研究IL-17在小鼠单纯疱疹性角膜基质炎模型中的表达。方法:将1.0×106空斑单位的单纯疱疹病毒1型KOS毒株接种于BALB/c鼠的角膜上,建立HSK动物模型。免疫组织化学染色观察IL-17在角膜中的表达。分别取正常小鼠及接种病毒后的第1～3,7,10,14,21,28d,用毛细管取小鼠的左眼眼眶静脉窦血1mL,分离淋巴细胞,行荧光抗体染色,用流式细胞仪检测IL-17阳性的CD4+T细胞的表达。在裂隙灯显微镜下观察角膜的变化,检查角膜的组织学病理改变。结果:实验组中,角膜和外周血均有IL-17表达。实验组角膜基质内炎性细胞、角膜混浊程度非常严重。IL-17的表达与HSK小鼠炎症表现的严重程度成正相关(r=0.609,P<0.01)。结论:IL-17在HSK小鼠模型中呈高表达,且IL-17在HSK的发病过程中起一定作用。     

Sensory Nerve Retraction and Sympathetic Nerve Innervation Contribute to Immunopathology of Murine Recurrent Herpes Stromal Keratitis

PurposeHerpes stromal keratitis (HSK) represents a spectrum of pathologies which is caused by herpes simplex virus type 1 (HSV-1) infection and is considered a leading cause of infectious blindness. HSV-1 infects corneal sensory nerves and establishes latency in the trigeminal ganglion (TG). Recently, retraction of sensory nerves and replacement with “unsensing” sympathetic nerves was identified as a critical contributor of HSK in a mouse model where corneal pathology is caused by primary infection. This resulted in the loss of blink reflex, corneal desiccation, and exacerbation of inflammation leading to corneal opacity. Despite this, it was unclear whether inflammation associated with viral reactivation was sufficient to initiate this cascade of events.MethodsWe examined viral reactivation and corneal pathology in a mouse model with recurrent HSK by infecting the cornea with HSV-1 (McKrae) and transferring (intravenous [IV]) human sera to establish primary infection without discernible disease and then exposed the cornea to UV-B light to induce viral reactivation.ResultsUV-B light induced viral reactivation from latency in 100% of mice as measured by HSV-1 antigen deposition in the cornea. Further, unlike conventional HSK models, viral reactivation resulted in focal retraction of sensory nerves and corneal opacity. Dependent on CD4⁺ T cells, inflammation foci were innervated by sympathetic nerves.ConclusionsCollectively, our data reveal that sectoral corneal sensory nerve retraction and replacement of sympathetic nerves were involved in the progressive pathology that is dependent on CD4⁺ T cells after viral reactivation from HSV-1 latency in the UV-B induced recurrent HSK mouse model.     

Improvement of HSV-1 necrotizing keratitis with amniotic membrane transplantation

PURPOSE: Stromal herpes simplex virus keratitis (HSK) is an immune-mediated disease. Previous studies have indicated that T cells, neutrophils, and macrophages contribute to the tissue damage in HSK. It has been shown that human amniotic membrane promotes epithelial wound healing and has diverse anti-inflammatory effects. In this study, the effect of amniotic membrane transplantation (AMT) on corneal wound healing and on inflammation in mice with necrotizing HSK was examined. METHODS: BALB/c mice were corneally infected with 10(5) plaque-forming units (PFU) of HSV-1 (KOS strain). In 16 mice that exhibited severe ulcerating HSK, the cornea was covered with a preserved human amniotic membrane as a patch. Corneas in 16 infected mice remained uncovered and served as a control. On days 2 and 7 after surgery, the amniotic membrane was removed (eight mice in each group), the HSV-1-infected cornea was evaluated clinically, and the eye was enucleated. Tissue sections were analyzed histologically for epithelialization and cellular infiltration and immunohistochemically with anti-CD3 mAb to T cells, anti-CD11b mAb to both macrophages and neutrophils, or anti-F4/80 mAb to macrophages. RESULTS: Profound regression of corneal inflammation and rapid closure of epithelial defects were observed clinically within 2 days in the amniotic membrane-covered eyes, whereas HSV-1 keratitis and ulceration progressed in all mice in the control group (P < 0.001). Histologically, corneal edema and inflammatory infiltration, and immunohistochemically the number of CD3(+), CD11b(+), and F4/80(+) cells in the cornea were markedly decreased at 2 and 7 days after amniotic membrane application, compared with the uncovered control corneas (P < 0.001). CONCLUSIONS: AMT promotes rapid epithelialization and reduces stromal inflammation and ulceration in HSV-1 keratitis. AMT in mice with HSV necrotizing stromal keratitis appears to be a useful model for investigating the effect and the action mechanism of human amniotic membrane.     

Herpes simplex virus-specific T cells infiltrate the cornea of patients with herpetic stromal keratitis: no evidence for autoreactive T cells

PURPOSE: Herpetic stromal keratitis (HSK) is a T-cell-mediated inflammatory disease initiated by a herpes simplex virus (HSV) infection of the cornea. Recently, studies in the HSK mouse model have shown that the immunopathogenic T cells are directed against the HSV protein UL6 cross-reacting with an unknown corneal autoantigen. Whether this type of autoimmunity plays a role in human HSK was analyzed. METHODS: T-cell lines (TCLs) were generated from corneal buttons of 12 patients with different clinical stages of HSV-induced necrotizing stromal keratitis (n = 9) or immune stromal keratitis (n = 3). The initiating virus was identified by polymerase chain reaction and immunohistology performed on the corneal buttons. Peripheral blood mononuclear cells (PBMCs) were isolated, and B cell lines (BLCLs) were generated by transformation with Epstein-Barr virus. Proliferative responses of these intracorneal TCLs were determined by culturing T cells with autologous BLCLs infected with HSV-1, HSV-2, wild-type vaccinia virus (VV-WT), or VV expressing HSV-1 UL6 (rVV-UL6). Alternatively, T cells were incubated with PBMCs pulsed with human cornea protein extract. RESULTS: Irrespective of clinical diagnosis or treatment, T cells were recovered from the corneal buttons of all the 12 HSK patients. The intracorneal TCLs of 9 of the 12 HSK patients showed HSV-specific T-cell reactivity. In none of the TCLs, T-cell reactivity against HSV-1 UL6 or human corneal antigens was detected. CONCLUSIONS: These data suggest that the potentially immunopathogenic intracorneal T-cell response in HSK patients is directed to the initiating virus and not to a human corneal autoantigen or HSV-1 UL6.     

单纯疱疹病毒1功能性基因在角膜内潜伏感染的实验研究

目的 研究角膜中是否有单纯疱疹病毒１型功能性基因的潜伏。方法 在新西兰白兔角膜上制作典型的单纯疱疹病毒１型引发的角膜炎模型,然后将进入稳定期的病变角膜移植到健康兔眼上,术后２周取下植片。每下植片标本均分为三部分,一部分角膜片先行ＨＳＶ－１抗原检测,另一部分采用多聚酶链反应技术检测ＨＳＶ－１潜伏相关转录、胸苷激酶和ＤＮＡ聚合酶基因,第三部分经器官培养３周后,再与兔原代肾细胞一起培养１周,再检测培养后     

单纯疱疹病毒Ⅰ型潜伏感染的研究：兔角膜HSV—1抗原的检测

通过使用HSV-1 Mckrae株在角膜上建立HSK感染的动物模型,应用辣根过氧化物酶免疫组织化学染色技术检测HSV-1抗原在角膜组织内存在的时间,结果发现,在角膜病变消失后5、10、20、30、45天的角膜基质组织内均有HSV-1抗原存在,但在60、80天的切片上抗原阴性。表明HSV-1原发感染消失后抗原在角膜基质内存在45天后转为阴性。说明角膜基质细胞是对HSV-1感染的最敏感细胞。     

Macrophage-depletion influences the course of murine HSV-1 keratitis

PURPOSE. Herpes simplex virus type 1 infection of the cornea induces an immune-mediated disease termed "herpes stromal keratitis" (HSK) that is a major cause of blindness. In this study we investigated the influence of macrophage depletion by Cl(2) MDP encapsulated in liposomes (Cl(2) MDP-LIP) on the course of HSV-1 keratitis. METHODS. The corneas of BALB/c mice were infected with 10(5) PFU of HSV-1 (KOS strain). Mice groups received sub-conjunctival PBS or Cl( 2) MDP-LIP injections 7 and 2 days prior to infection. The eyes were studied clinically, histologically and immunohistochemically with F4/80 antibody at various time points after treatment. Clearance of the virus from the HSV-infected eyes was measured with a standard plaque assay. RESULTS. After subconjunctival Cl(2) MDP-LIP treatment, the HSV-1-induced epithelial keratitis was more severe (P < 0.05). The virus titers were significantly higher after macrophage depletion (day 7, P < 0.005). Stromal keratitis developed in 78.6% of HSV-1 infected PBS treated control mice ( n = 14) by day 14 after infection. By subconjunctival Cl(2) MDP-LIP treatment (n = 14) the incidence of stromal keratitis was reduced to 42.9%, and the keratitis was less severe (P < 0.05). CONCLUSIONS. The data demonstrate an influence of macrophages on the course of HSV-1 keratitis in mice. Macrophage depletion influence the viral replication in the cornea and the immune-mediated process of HSK.     

Immunomodulation of experimental murine herpes simplex keratitis: I. UV-HSV protection

A/J mice were immunized subcutaneously with ultraviolet light (UV) inactivated herpes simplex virus type-1, MP strain (HSV-MP). Control A/J mice were immunized subcutaneously either with media (unimmunized controls) or with live HSV-MP (immunized controls). Immunized and control mice were challenged ocularly with either MP or mP strain HSV-1 after corneal scarification and were followed for 3 weeks post corneal challenge. The mice were observed during this time period for signs of herpes simplex keratitis (HSK), lid lesions and encephalitis. At the time of sacrifice, the ipsilateral trigeminal ganglia were removed and assayed for latent HSV-1 using cocultivation on Vero cell monolayers. The results of these studies demonstrated that immunization with UV inactivated HSV (UV-HSV) gave the same protection against keratitis and encephalitis as immunization with live virus. Furthermore, the cocultivation assays indicated that immunization with either live HSV-1 or UV inactivated HSV-1 protected against the establishment of latency.     

单纯疱疹病毒性角膜炎角膜组织病毒潜伏感染的PCR检测分析

 目的  探讨通过穿透性角膜移植获取的单纯疱疹病毒性角膜炎病变角膜组织中1型单纯疱疹病毒（HSV-1）DNA的表达情况及意义。设计 实验研究。研究对象  2010年5-12月北京同仁医院因病毒性角膜炎角膜白斑行穿透性角膜移植术后角膜标本20例,圆锥角膜、大泡性角膜病变和角膜营养不良等非感染性角膜病变的角膜标本20例。方法  对角膜组织标本中HSV-1 DNA进行聚合酶链反应（PCR）检测。 主要指标  HSV-1 DNA的阳性率。结果  单纯疱疹病毒性角膜炎静止期患者角膜组织中12/20例（60%）检出HSV-1 DNA,非感染性角膜组织中6/20例（30%）检出HSV-1 DNA（χ2=3.64,P=0.057）。结论  单纯疱疹病毒性角膜炎静止期角膜组织多数表达HSV-1 DNA,角膜内潜伏病毒是引起单纯疱疹病毒性角膜炎的可能原因,正常人角膜也可能有HSV-1的DNA存在。（眼科,2013,22：45-48）