非磨削型嫩肤激光对小鼠皮肤失水的影响

目的 研究非磨削型激光嫩肤对皮肤屏障功能的影响.方法 用CooltouchⅡ 1320nm激光、Gentlelase755nm激光、Vbeam595nm激光、GentleYAG1064nm激光照射小鼠皮肤.并用1%透明质酸钠涂抹于GentleYAG 1064nm激光照射后的皮肤,观察1周内皮肤经表皮失水、含水量的变化.结果 激光照射小鼠皮肤1h时就出现了经表皮失水较正常对照组显著性增高(P<0.05),595nm激光照射引起的皮肤经表皮失水值增高在激光照射后的第7天恢复正常(P>0.05).1320nm激光在第2天时恢复正常(P>0.05),1064nm激光在第4天恢复正常(P>0.05),755nm激光在第4天恢复正常(P>0.05).GentleYAG1064nm激光照射部位的皮肤每天用1%透明质酸钠涂抹1次后,经表皮失水值在第4天恢复正常(P>0.05).结论 各种非磨削型嫩肤激光照射小鼠背部皮肤后均引起局部皮肤经表皮失水增加,24h内均未能恢复正常,但是在1周时均可基本恢复正常.波长较短的595nm激光引起的经表皮失水恢复较慢,而波长较长的1320nm激光引起的经表皮失水恢复较快.激光照射后外用1%透明质酸钠无助于皮肤经表皮失水的恢复.     

寻常性银屑病患者皮损中Caspase-3和bcl-xL的表达

目的 探讨Caspase-3和bcl-xL在银屑病皮损中的表达及意义。方法 采用免疫组化法对26例寻常性银屑病患者的皮损及其周边外观正常皮肤和10例正常人对照皮肤中Caspase-3和bcl-xL的表达进行了检测。结果 正常人对照皮肤、银屑病皮损及其周边外观正常皮肤的表皮均表达Caspase-3,其中皮损处的表达明显增强(P<0.0001);除皮损表皮中散在表达bcl-xL外,正常人对照皮肤、银屑病皮损周边外观正常皮肤的表皮中不表达bcl-xL。结论 Caspase-3和bcl-xL可能通过诱导银屑病皮损角质形成细胞的凋亡而参与了银屑病的发病。     

结合珠蛋白在银屑病皮损及皮损周边外观正常皮肤中的表达

目的 从mRNA及蛋白质水平研究结合珠蛋白在银屑病皮损及皮损周边外观正常皮肤中的表达,探讨其与朗格汉斯细胞的关系及在银屑病发病中的作用.方法采用免疫组化、免疫荧光双标记和原位杂交技术检测银屑病皮损及皮损周边外观正常皮肤中结合珠蛋白的表达.结果与正常人皮肤相比,银屑病皮损处角质形成细胞中结合珠蛋白mRNA的表达均明显增强(P＜0.001);皮损周边外观正常皮肤中的表达与正常人皮肤差异无显著性(P＞0.05).免疫组化显示:皮损处部分角质形成细胞胞浆中有结合珠蛋白表达;皮损及皮损周边外观正常皮肤中均可见结合珠蛋白在部分朗格汉斯细胞中呈阳性表达,且两者中结合珠蛋白阳性朗格汉斯细胞与朗格汉斯细胞总计数的比值较正常皮肤显著增高(P＜0.001).结论银屑病皮损处角质形成细胞中结合珠蛋白mRNA的表达增强,并能合成结合珠蛋白.合成结合珠蛋白的角质形成细胞可能在银屑病发病机理中起负反馈调节作用。     

miR-142-3p/Sema3A轴调节角质形成细胞增殖凋亡及银屑病皮肤炎症反应

目的 旨在探讨miR-142-3p在M5刺激人表皮角质形成细胞HaCaT中的作用及潜在机制.方法 MTT法检测细胞增殖;ELISA凋亡检测试剂盒评估细胞凋亡.ELISA试剂盒测定炎症介质TNF-α、IL-22和IL-17A的分泌量.RT-PCR和Western blot分别测定目的基因mRNA和蛋白表达.荧光素酶报告实...     

银屑病患者皮损表皮细胞促凋亡分子PDCD5表达的研究

目的 探讨银屑病患者表皮细胞过度增殖与细胞凋亡分化调节异常的关系.方法 寻常性银屑病患者30例,正常人对照28例.采用直接免疫荧光观察促凋亡分子PDCD5的表达状态,流式细胞仪和计算机CELL Quest软件定量分析表皮单细胞表达PDCD5的平均荧光强度和阳性率,逆转录聚合酶链反应方法检测表皮细胞表达PDCD5 mRNA的变化.结果 银屑病患者皮损增生的表皮组织细胞内PDCD5蛋白的表达明显降低,表皮单细胞表达PDCD5促凋亡分子的平均荧光强度和阳性率较正常人显著降低(P<0.01),皮损组织细胞表达PDCD5 mRNA显著低于正常人.结论 银屑病患者局部皮损表皮细胞的过度增殖与促凋亡分子PDCD5表达的下调有关,与表皮细胞的凋亡及终末分化过程的调节异常密切相关.     

Daytime Changes of Skin Biophysical Characteristics: A Study of Hydration,Transepidermal Water Loss,pH, Sebum,Elasticity, Erythema,and Color Index on Middle Eastern Skin

Background:The exposure of skin to ultraviolet radiation and temperature differs significantly during the day. It is reasonable that biophysical parameters of human skin have periodic daily fluctuation. The objective of this study was to study the fluctuations of various biophysical characteristics of Middle Eastern skin in standardized experimental conditions.Results:A significant difference was observed between means of skin color index at 8 a.m. (175.42 ± 13.92) and 4 p.m. (164.44 ± 13.72, P = 0.025), between the pH at 8 a.m. (5.72 ± 0.48) and 4 p.m. (5.33 ± 0.55, P = 0.001) and pH at 12 p.m. (5.60 ± 0.48) and 4 p.m. (5.33 ± 0.55, P = 0.001). Other comparisons between the means of these parameters at different time points resulted in nonsignificant P values.Conclusion:There are daytime changes in skin color index and pH. Skin color index might be higher and cutaneous pH more basic in the early morning compared to later of the day.     

HB-EGF在进行期银屑病皮损中的表达

目的　探讨肝素结合表皮生长因子样生长因子 (HB EGF)在银屑病发病早期中的作用机制。方法　用免疫组织化学的方法检测正常皮肤组织、银屑病未受累皮肤和进行期银屑病皮损中HB EGF的表达。结果　正常皮肤中 ,HB EGF位于基底层 ( 10 0 % ) ,基底上层几乎不表达 ;在银屑病未受累皮肤和银屑病皮损的周围部分中 ,HB EGF表达升高 ,不仅位于基底层 ,且以灶状分布于基底上层 ( 95 .2 4% ,85 .71% ) ;在银屑病皮损的中央部分 ,全层均无HB EGF表达。结论　HB EGF在银屑病发病的早期阶段可能起一定作用 ,纠正其异常表达可能为银屑病治疗开辟新途径 ,提供新药物。     

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。     

寻常性银屑病患者皮肤和血清中肿瘤坏死因子α受体p75测定

目的探讨肿瘤坏死因子(TNF)α受体75 000(p75)在寻常性银屑病中的作用机制。方法采用免疫组化和ELISA 方法对寻常性银屑病患者皮损、皮损周围“正常”皮肤p75表达及其在血清中的含量进行检测。结果正常人皮肤表皮基底细胞散在表达p75;银屑病患者皮损周围“正常”表皮、皮损表皮、真皮内浸润单一核细胞(MNCs)均表达p75;银屑病皮损表皮角质形成细胞p75表达强度与真皮内MNCs数呈显著正相关(r's = 0.73,P<0.05);银屑病患者血清中p75的含量与对照组比较差异有显著性(t=3.98,P<0.05);银屑病皮损表皮角质形成细胞p75表达强度与其血清中p75含量呈显著正相关(r's = 0.62,P<0.05)。结论银屑病患者皮肤和血清中TNFα受体p75的异常上调可能是造成银屑病发生和发展的原因之一。     

Comparison of Skin Hydration Evaluation Sites and Correlations among Skin Hydration, Transepidermal Water Loss, SCORAD Index, Nottingham Eczema Severity Score, and Quality of Life in Patients with Atopic Dermatitis

Background:Atopic dermatitis (AD) is characterized by dryness of the skin, pruritus and involvement of the skin flexures. Skin hydration (SH) and integrity, as measured by transepidermal water loss (TEWL), are important parameters for objectively quantifying AD research. Objectives:To evaluate if sites in the forearm are equivalent to the antecubital fossa for standard SH and TEWL measurements; and to determine the correlations among these measurements and scores of disease severity and quality of life. Methods:We evaluated SH and TEWL under standardized conditions at three common measurement sites in the forearm (antecubital flexure, 2 cm below the antecubital flexure, mid-forearm), and determined the SCORing Atopic Dermatitis (SCORAD) score, Nottingham Eczema Severity Score (NESS), and Children’s Dermatology Life Quality Index (CDLQI). Results:Significant correlations between clinical scores, SH, and TEWL were obtained at a site 2 cm below the antecubital fossa (r = -0.553, p < 0.001 for SH and SCORAD; r = 0.596, p <0.001 for TEWL and SCORAD). SH and TEWL were also correlated with long-term severity of AD as measured by NESS (r = -0.494, p = 0.001 for SH; r = 0.430, p = 0.004 for TEWL), while TEWL was significantly correlated with CDLQI (r = 0.323, p = 0.035). Overall, similar significant correlations were obtained at the mid-forearm, but less so at the antecubital fossa. Conclusion:In AD research, three sites on the forearm appear to be convenient for determination of SH and TEWL. This is the first report to demonstrate that significant correlations are obtained among acute and chronic scores of AD disease severity, quality of life, and the bioengineering parameters     

银屑病患者血清和皮损中血管内皮细胞粘附分子的对比研究

目的 探讨银屑病患者血清和皮损中4种血管内皮粘附分子表达与银屑病疾病活动性之间的关系。方法 采用ELISA法检测36例银屑病患者治疗前后和36例健康人的血清中可溶性粘附分子（sICAM-1、sICAM-3、sVCAM-1、sELAM）的浓度。同时用ABC免疫组化染色技术检测了36例银屑病患者皮损和临床治愈处皮肤粘附分子（ICAM－1、ICAM－3、VCAM－1、ELAM）的表达情况。结果 与正常人相比，银屑病患者皮损部位4种粘附分子的原位表达呈明显上调（P＜0.005），同时患者血清中4种可溶性粘附分子浓度也明显升高（P＜0.001）。经治疗后银屑病患者皮损部位4种粘附分子的原位表达明显下调（P＜0.05），同时血清中4种可溶性粘附分子浓度比前也下降（P＜0.05）；血清中4种可溶性粘附分子的浓度与银屑病疾病活动严重指数（PASI）均呈正相关，但治疗前后sVCAM-1的水平上升和下降的幅度最大，且与PASI的相关性最好。结论 血管内皮细胞粘附分子参与银屑病的发病机制；患者血清中可溶性粘附分子浓度的升高可能与皮损部位血管内皮细胞上相应的粘附分子高表达有关；血清VCAM－1的水平可以作为反映银屑病疾病活动的一个新的敏感指标。     

CD28/B7在银屑病皮损及外周血淋巴细胞中的表达

目的 探讨CD28/B7共同刺激分子在银屑病发病中的作用。方法 采用免疫组化ABC法检测22例银屑病皮损、流式细胞仪检测17例银屑病外周血淋巴细胞CD28、CD80、CD86的表达水平。15例整形外科手术患者的皮肤和外周血作为正常人对照。结果 免疫组化结果显示银屑病组皮损中CD28、CD80、CD86的表达明显增多,与正常人对照组相比差异均有显著性(P<0.01);进行期皮损中的表达显著高于静止期,差异均有显著性(P<0.05)。流式细胞仪检测显示CD28、CD80、CD86在银屑病组外周血淋巴细胞中的表达明显高于对照组,差异有显著性(P<0.01);进行期组与静止期组相比,CD28差异无显著性(P>0.05),CD80与CD86差异有显著性(P₁<0.01,P₂<0.05)。结论 CD28、CD80、CD86在银屑病发展过程中起一定作用。     

银屑病患者血清及皮肤中补体及其活化成分的变化

目的 研究银屑病患者血清及皮肤中补体及其活化成分的变化,以探讨其与银屑病皮损形成的关系。方法 采用双抗体夹心ELISA法和免疫比浊法检测了57例银屑病患者血清补体活化片段C3d及可溶性补体激活片段sC5b-9及补体C3、C4的变化;采用免疫组化法(ABC法)检测了37例银屑病患者皮损组织、非皮损组织及20例正常皮肤组织C5b-9的原位表达。结果 银屑病患者血清中C3、C4水平明显下降;C3d、sC5b-9水平明显增高,与对照组比较差异有非常显著性,进行期患者血清中C3、C4明显低于静止期,而C3d、sC5b-9明显高于静止期,差异均有显著性。银屑病皮损组织中角质层和真表皮交界处C5b-9阳性数显著高于非皮损组织和正常组织;进行期银屑病患者皮损组织角质层和真表皮交界处C5b-9阳性表达数差异无显著性。结论 银屑病的发病以及皮损的严重程度与补体的活化可能有关。     

bFGF及其mRNA在银屑病皮损的表达

目的探讨碱性成纤维细胞生长因子(bFGF)在银屑病发病机制中的作用。方法采用组织切片免疫组化和原位杂交技术对22例银屑病皮损和19例正常皮肤的bFGF进行检测。结果寻常型进行期银屑病皮损表皮bF-GF蛋白和mRNA阳性主要表达于表皮基底层和棘层,定位于细胞核、细胞浆和细胞膜;正常皮肤则表达于表皮的基底层,定位于细胞核、细胞浆和细胞膜。统计学分析发现银屑病皮损区表皮与正常皮肤表皮bFGF蛋白和mRNA均有显著性差异(P<0.01)。结论bFGF可能参与银屑病角质形成细胞增殖和真皮微血管异常的发生。     

寻常性银屑病患者Th17细胞与相关转导因子的表达

目的探讨Th17细胞与相关转导因子在银屑病中的表达及意义。方法采用ELISA法检测寻常性银屑病患者及对照组血清IL-17,IL-23和IL-6水平;收集寻常性银屑病患者皮损及正常人皮肤作为对照,用免疫组化法检测STAT3和ROR_γt的表达;通过蛋白印迹法测定STAT3和RORγt含量;实时荧光定量PCR法检测STAT3 mRNA和ROR_γtmRNA的表达。结果银屑病患者血清IL-17,IL-23和IL-6的表达水平明显高于对照组,银屑病患者皮损STAT3和ROR_γt阳性率及蛋白含量和STAT3mRNA的表达均高于对照组,差异均有统计学意义(P均<0.01),ROR_γt mRNA的表达与对照组相比差异无统计学意义(P>0.05)。结论 Th17细胞在患者血清与相关转导因子在皮损中表达上调,STAT3和ROR_γt可能参与诱导Th17细胞的产生,这可能是Th17细胞与相关转导因子参与银屑病发生和发展的机制之一。     

Characteristics of Pruritus according to Morphological Phenotype of Psoriasis and Association with Neuropeptides and Interleukin-31

BackgroundPruritus is a common symptom in psoriasis. However, few studies have assessed the characteristics of pruritus according to morphological phenotypes of psoriasis.ObjectiveTo investigate the characteristics of pruritus according to morphological phenotypes of psoriasis and to assess the association with inflammatory mediators related to pruritus.MethodsPsoriasis patients were divided into 2 groups according to clinical phenotype: eruptive inflammatory (EI) and chronic stable (CS). Clinical data of pruritus were assessed by an itch questionnaire. Serum neuropeptides and cytokines including substance P, histamine, vasoactive intestinal peptide, neuropeptide Y, calcitonin gene-related peptide and interleukin-31 (IL-31) were quantitatively measured.ResultsIn total, 50 patients with psoriasis (30 male, 20 female; mean age, 45.7 years) were studied (EI, n=15 and CS, n=35). Pruritus was reported by 80% of EI and CS patients. There were no significant differences in prevalence of pruritus, pruritus intensity, severity of psoriasis, serum neuropeptides, or IL-31 between the 2 groups.ConclusionThe morphological phenotype does not seem to be an important factor affecting the prevalence and characteristics of pruritus in psoriasis.