血管内皮生长因子在寻常型银屑病患者中医辨证分型皮损和血清中的表达

目的探讨血管内皮生长因子(VEGF)在寻常型银屑病患者中医辨证分型(血热型、血燥型和血瘀型)皮损和血清中的表达。方法采用免疫组化法和酶联免疫吸附法(ELISA法)对60例寻常型银屑病患者(中医辨证分型)皮损处及血清中VEGF的水平进行了检测。结果皮损处VEGF水平为血热型组>血燥型组及血瘀型组;血清中VEGF的水平为血热型组>血燥型组>血瘀型组。结论对寻常型银屑病患者皮损处及血清中VEGF水平的检测有可能用于血热型银屑病与非血热型银屑病的中医辨证分型。     

银屑病患者皮损和血清中血管内皮生长因子的表达分析

目的 探讨血管内皮生长因子(VEGF)与银屑病发病的关系.方法 ①用免疫组化法检测35例银屑痛患者皮损、非皮损和10例正常人皮肤中VEGF的表达情况;②用酶联免疫吸附法(ELISA)检测25例寻常性银屑病患者和15例正常人血清中VEGF的表达.结果 ①VEGF主要表达于银屑病皮损的角质形成细胞、真皮乳头血管内皮及真皮上层部分浸润的炎症细胞内.非皮损部位少量表达,而在正常人表皮中几乎不表达;皮损组有20人以上的患者染色级别在++以上,表达明显高于正常人皮肤,有统计学意义(P<0.05);非皮损组与正常人比较无明显差异,没有统计学意义(P>0.05).②静止期银屑病患者血清中VEGF表达比正常人高,差异有统计学意义(P<0.05).结论 VEGF可能与银屑病病理过程有关.     

血管内皮生长因子和血管生成素在斑秃皮损中的表达

目的:探讨血管内皮生长因子(VEGF)和血管生成素在斑秃患者皮损处的表达情况.方法:取新鲜斑秃患者皮损和正常人头皮行冰冻切片,采用免疫组化的方法检测VEGF和血管生成素蛋白的分布和表达.结果:人毛囊的毛乳头、真皮鞘,皮脂腺等处均表达VEGF和血管生成素蛋白.斑秃患者此两种因子表达明显低于正常对照(P<0.05),且表达强度与斑秃严重程度呈负相关.结论:VEGF和血管生成素表达下调可能与斑秃的发病有关.     

银屑病患者皮损中血管内皮生长因子和基质金属蛋白酶2的表达

目的探讨血管内皮生长因子(VEGF)、基质金属蛋白酶2(MMP-2)在寻常性银屑病皮损血管生成中的作用。方法采用免疫组化法检测30例寻常性银屑病皮损、12例非皮损和12例正常人皮肤中VEGF、MMP-2的表达水平与分布特征。结果①VEGF在银屑病皮损组织中阳性表达明显高于非皮损组织和正常人皮肤(P<0.05)。②MMP-2在银屑病皮损组织中的阳性表达明显高于非皮损组织和正常人皮肤(P<0.05)。③VEGF、MMP-2在银屑病皮损中表达呈正相关(P<0.05)。结论VEGF、MMP-2在寻常性银屑病发病的血管生成中可能起协同作用。     

银屑病皮损区肥大细胞分布和血管内皮细胞CD34表达的研究

目的探讨肥大细胞(MC)和血管内皮细胞在银屑病发病中的作用.方法采用组织化学和免疫组化的方法,观察寻常性银屑病皮损处MC和CD34标记血管内皮细胞的分布情况.结果经甲苯胺蓝特殊染色发现,银屑病患者真皮区的MC密度在进行期(33.07±14.63)个/mm2,高于静止期(21.80±4.86)个/mm2,静止期又高于正常对照组(15.85±6.93)个/mm2,它们之间的差异均有显著性;免疫组化观察发现,银屑病真皮区CD34标记的微血管密度在进行期(2931±4.04)个/mm2,明显高于静止期(2231±2.07)个/mm2,而静止期又明显高于正常对照组(18.81±2.59)个/mm2.结论寻常性银屑病皮损处真皮内肥大细胞和血管内皮细胞密度明显增加,且与病情变化有关.     

血管内皮生长因子及其受体在尖锐湿疣皮损中的表达

血管内皮生长因子(VEGF)通过与其受体(VEGFR)结合而发挥生物学效应。VEGFR是VEGF的特异性结合受体,属酪氨酸激酶受体家族成员,VEGF与VEGFR结合后,激活细胞内信号转导,增加血管通透性,刺激血管内皮细胞增殖,促进新生血管生成。VEGF在促进肿瘤生长及转移中起着重要作用。本研究观察VEGF及其受体在尖锐湿疣(CA)组织中的表达,以及对尖锐湿疣血管生成的影响。     

血管内皮生长因子在某些增生性皮肤病皮损表皮的表达

血管内皮生长因子(vascular endothelial growth factor,VEGF)在离体实验中可引起血管内皮细胞的增殖,诱导血管新生和血管通透性增加^[1],在大疱性类天疱疮、结节性痒疹等皮损中VEGF有高表达^[2].     

血管内皮生长因子及其受体在尖锐湿疣组织中的表达

血管内皮生长因子(VEGF)有两种特异性受体,分别为含激酶插入区受体(KDR)和fms样酪氨酸激酶-1(Flt-1),主要分布在血管内皮细胞表面^[1]。研究表明在人类实体肿瘤中VEGF表达升高^[2]。本实验用RT-PCR方法检测VEGF、Flt-1、KDR的mRNA在尖锐湿疣组织的表达,探讨在尖锐湿疣发病机制的作用。     

血管内皮生长因子及其受体在银屑病发病中的作用及意义

目的 研究血管内皮生长因子(VEGF)及其受体在银屑病皮损中的表达。方法 采用原位杂交和免疫组化SABC法,检测42例寻常性银屑病患者皮损和15例正常人皮肤组织VEGFmRNA和其蛋白、VEGF受体2(KDR蛋白)、微血管密度(MVD),分析其表达情况。采用双抗体夹心酶联免疫吸附法检测患者和正常人血清中VEGF水平。结果 ①寻常性银屑病患者皮损处的VEGFmRNA及其蛋白、KDR和MVD表达明显强于正常人对照组(P<0.001);皮损处与非皮损组相比,VEGFmRNA和其蛋白的表达差异无统计学意义,但KDR、MVD的表达差异有统计学意义;进行期与静止期比较四者差异均有统计学意义。②高密度组(MVD≥17.88)与低密度组(MVD<17.88)的VEGFmRNA及其蛋白表达差异无统计学意义,但KDR表达差异有统计学意义(P<0.01),且PASI评分差异也有统计学意义(P<0.001)。③患者血清中VEGF水平明显高于正常人对照组。结论 ①VEGF及其受体在银屑病新生血管形成中起重要作用。②MVD值可反映寻常性银屑病的严重程度,可作为判断病情和预后的指标。     

扁平苔藓皮损中缺氧诱导因子1α、血管内皮生长因子和蛋白激酶B的表达

目的：探讨扁平苔藓皮损中缺氧诱导因子1α（HIF?1α）、血管内皮生长因子（VEGF）和蛋白激酶B（P?Akt）的表达与血管形成及凋亡的关系。方法免疫组化法和TUNEL法检测32例扁平苔藓患者皮损和20例脂肪瘤皮肤石蜡标本HIF?1α、VEGF和P?Akt表达和细胞凋亡情况,同时用CD34标记血管内皮细胞,计算微血管密度（MVD）。结果 HIF?1α、VEGF和P?Akt在32例扁平苔藓组皮损表皮角质形成细胞中均有不同程度的表达（++～+++）,HIF?1α表达部位为细胞核,VEGF和P?Akt表达部位为细胞质,高于对照组HIF?1α、VEGF和P?Akt（-~++）的表达,两组比较,差异有统计学意义（均P<0.01）。扁平苔藓组皮损处MVD为（21.27±6.54）个/高倍视野（×200）,对照组MVD为（10.26±1.10）个/高倍视野（×200）,两组比较,差异有统计学意义（t=5.607,P<0.01）。扁平苔藓组表皮层角质形成细胞的凋亡指数（72.81%±9.234%）显著高于对照组（28.16%±3.464%）,两组比较,差异有统计学意义（t=8.431,P<0.01）。扁平苔藓皮损中HIF?1α、VEGF和P?Akt的表达水平间均呈正相关（r值分别为0.625,0.453,0.455,均P<0.01）。HIF?1α、VEGF和P?Akt的表达与MVD均呈正相关（r值分别为0.721,0.646,0.671,均P<0.01）。结论 HIF?1α及其下游靶基因VEGF、P?Akt在扁平苔藓的发病中可能起一定的作用。     

蕈样肉芽肿与扁平苔藓、银屑病浸润细胞的免疫组化比较

目的 探讨免疫表型对蕈样肉芽肿与扁平苔藓、银屑病鉴别诊断的意义.方法 应用ABC免疫组化技术检测15例蕈样肉芽肿,17例银屑病和17例扁平苔藓,6例正常人皮肤的CD1a、CD4、CD8、ICAM-1、LFA-1、HLA-DR(树枝状细胞)、CD30和CD7的表达情况.结果 蕈样肉芽肿表皮CD1a,CD30,ICAM-1(单一核细胞P<0.001,树枝状细胞P<0.01)的阳性细胞密度明显高于扁平苔藓、银屑病、正常人皮肤.蕈样肉芽肿表皮CD4,CD8,HLA-DR的阳性细胞密度明显高于扁平苔藓.蕈样肉芽肿真皮中CD1a阳性细胞的线性密度(P<0.01),真皮内ICAM-1和LFA-1阳性细胞百分比亦较扁平苔藓增多(P<0.05).蕈样肉芽肿表皮CD7阳性细胞与扁平苔藓、银屑病比较差异无统计学意义.银屑病和扁平苔鲜真皮内CD7阳性细胞百分比高于蕈样肉芽肿和正常人皮肤.结论 蕈样肉芽肿和扁平苔藓、银屑病皮损CD1a、CD4、CD8、ICAM-1、LFA-1、HLA-DR、CD30和CD7免疫表型有差异,其结果可为探讨发病机制提供线索.     

扁平苔藓的皮肤镜学表现

扁平苔藓的主要皮肤镜学表现包括具有诊断意义的叶脉状、网状Wickham纹,和非特异性点状或线状血管及点状、球状或线状色素沉着;偶尔可见其他一些变异表现。使用皮肤镜可以更清楚观察到肉眼能辨认的Wickham纹和肉眼看不到Wickham纹、血管和色素表现,因此皮肤镜有助于扁平苔藓的诊断及与银屑病、皮炎湿疹、红斑狼疮等相似疾病的鉴别诊断。     

Impairment of myocardial functions and arterial stiffness in patients with lichen planus

BackgroundLichen planus is a chronic inflammatory mucocutaneous disease. Recent studies have suggested that it is associated with an increased risk of cardiovascular comorbidities.ObjectiveThe purpose of this study was to assess and compare arterial stiffness and cardiovascular hemodynamics in patients with lichen planus and a healthy control group.MethodsFifty-five patients with lichen planus and 42 healthy controls were enrolled. All patients underwent echocardiographic examination, and arterial stiffness was measured using applanation tonometry.ResultsNo statistically significant difference was determined between the patient and control groups in terms of arterial stiffness, but stiffness was markedly higher in patients with erosive lichen planus compared to the control group and other patients (p = 0.006, and p = 0.023, respectively). Moderate positive correlation was determined between duration of disease and arterial stiffness. Impairment of systolic and diastolic functions was also determined in patients with lichen planus compared to the control group (p < 0.001, and p = 0.005, respectively).Study limitationsRelatively low number of patients.ConclusionThe positive correlation observed between duration of disease and arterial stiffness in patients with lichen planus suggests that these patients should be followed-up in terms of cardiovascular risk in the presence of resistant and long-term disease, particularly in case of erosive lichen planus.     

银屑病患者皮损中VEGF受体FLT-1和KDR的表达

目的:检测VEGF受体FLT-1与KDR在寻常型银屑病皮损中的表达水平,探讨其在银屑病发病中的意义。方法:应用免疫组化SABC法,检测37例寻常型银屑病患者皮损和37例正常人皮肤组织FLT-1蛋白、KDR蛋白的表达。结果:寻常型银屑病皮损处的FLT-1蛋白和KDR蛋白的表达水平明显强于正常对照组(P<0.001);KDR的表达强度与寻常型银屑病严重程度指数PASI评分有显著正相关(r=0.93,P<0.001),且KDR的表达强度高于FLT-1的表达强度(P<0.05)。结论:VEGF的两种受体FLT-1与KDR在银屑病新生血管形成中具有重要作用,其中KDR起主要作用。通过阻断VEGF受体KDR以抗血管生成,可望为治疗银屑病提供一种新的有效方法。     

Quantitative analysis of contact sites between mast cells and sensory nerves in cutaneous psoriasis and lichen planus based on a histochemical double staining technique

Summary The aim of the present study was to test further our previous hypothesis that the inflammatory reaction in psoriasis is neurogenic. For this purpose, contact sites between mast cells and sensory nerves were morphometrically analysed in the basement membrane zone, papillary dermis and three dermal zones of lesional/non-lesional psoriatic and lichen planus skin as well as in healthy control skin. The analyses were made on sections stained with a histochemical double stain developed for this study. With the double stain, active mast cell tryptase was stained blue enzyme histochemically, and the sensory nerves black using specific monoclonal anti-neurofilament antibodies with immunogold. In psoriatic lesions, both mast cells and mast cell — nerve contacts were markedly more frequent in the basement membrane zone and in the papillary dermis when compared with the corresponding areas in the other groups. Mast cell numbers were increased in both lesional and symptom-free skin in lichen planus, but no increase was found in the mast cell — nerve contacts. Increased contacts between mast cells and sensory nerves indicate that the elements exist for neurogenic inflammation in psoriatic lesions. These increased contacts are not due to the extensive inflammatory reaction only, because they were not observed in lichen planus lesions.     

皮肤基底细胞癌组织中血管内皮细胞生长因子受体-2的表达

目的 研究血管内皮生长因子受体-2(VEGFR-2)在皮肤基底细胞癌(BCC)组织中的表达情况.方法 提取BCC组织的mRNA,以RT-PCR法检测标本中VEGFR-2mRNA的表达.同时应用蛋白质印迹法检测VEGFR-2蛋白的表达,免疫荧光法检测VEGFR-2在BCC组织中的定位.结果 BCC组织标本mRNA和蛋白水平中均可以检测到VEGFR-2的表达,并较正常人对照有显著增加.VEGFR-2在BCC细胞主要表现为膜性分布.结论 皮肤BCC组织细胞能够高异常表达VEGFR-2,可能是导致BCC细胞肿瘤性增殖的原因之一.     

IL-22在扁平苔藓中的表达

目的：研究IL-22在扁平苔藓皮损中的表达,探讨其在扁平苔藓疾病中的作用。方法：免疫组化检测IL-22在30例扁平苔藓皮损和10例正常皮肤组织中的表达。结果：在扁平苔藓皮损中IL-22主要表达于表皮全层的角质形成细胞和真皮浅层浸润的淋巴细胞胞质,在正常皮肤中IL-22主要表达于基底层附近的角质形成细胞,IL-22在扁平苔藓皮损的表达水平明显高于正常皮肤（P<0.01）。结论：IL-22在扁平苔藓发病中可能起一定作用。     

The role of perforin-mediated apoptosis in lichen planus lesions

Lichen planus is recognized as a T-cell-mediated disease. Histologically, it is characterized by the formation of colloid bodies representing apoptotic keratinocytes. The apoptotic process mediated by CD8⁺ cytotoxic T lymphocytes (CTLs) and NK cells mainly involves two distinct pathways: the perforin/granzyme pathway and the Fas/FasL pathway. So far, little is known regarding the role of perforin-mediated apoptosis in lichen planus. In the present study, the expression and distribution of perforin, T and NK cell subsets in the epidermis and dermis of lesional and nonlesional lichen planus skin were studied. Skin biopsy specimens from lesional and nonlesional skin of ten patients with lichen planus and eight healthy persons were analysed by immunohistochemistry. Significant accumulation of T cells, particularly of CD4⁺ and CD8⁺ subsets, was found in both epidermis and dermis of lichen planus lesions compared with nonlesional and healthy skin. There were no significant differences in the incidence of NK cells (CD16⁺ and CD56⁺) between lesional, nonlesional and healthy skin. Perforin expression was significantly upregulated in the epidermis of lichen planus lesions. In conclusion, accumulation of perforin⁺ cells in the epidermis of lichen planus lesions suggest a potential role of perforin in the apoptosis of basal keratinocytes.     

神经生长因子及其高亲和受体酪氨酸激酶、低亲和公共受体p75NTR在扁平苔藓皮损中的表达及意义

【摘要】 目的 检测神经生长因子（NGF）及其受体TrkA、p75NTR在扁平苔藓皮损中的表达。 方法 应用免疫组化ABC法检测32例扁平苔藓皮损和12例健康人皮肤石蜡标本NGF及其受体TrkA、p75NTR表达状况。 结果 NGF及TrkA在32例扁平苔藓皮损表皮角质形成细胞中均有不同程度的表达（++ ～ +++）,表达部位为细胞质,高于健康人皮肤NGF（- ～ +）及TrkA（- ～ +）的表达,两组间差异均有统计学意义（P < 0.01）;而p75NTR的表达两组差异无统计学意义。扁平苔藓皮损中NGF与TrkA表达呈正相关（R2 = 0.535,P < 0.01）。NGF及其受体TrkA、p75NTR在扁平苔藓不同发病年龄、部位以及不同性别患者角质形成细胞中的表达差异均无统计学意义。 结论 NGF通过其高亲和受体TrkA在扁平苔藓的发病中可能起着一定的作用。     

CD44分子在扁平苔藓中的表达

目的：检测扁平苔藓皮损组织中粘附分子CD44的表达。方法：对30例扁平苔藓患者的皮损组织、10例正常皮肤组织、10例病理上以淋巴细胞浸润为主的皮损组织进行免疫组化染色。结果：在扁平苔藓皮损中,表皮及真皮中CD44分子的表达较正常皮肤及以淋巴细胞浸润为主的皮损组织均明显增强,差异有统计学意义（P<0.01）。结论：CD44分子可能与扁平苔藓发病相关。