白癜风患者皮肤组织液氧化-抗氧化物水平比较分析

目的探讨体内氧化-抗氧化状态与白癜风发病的关系。方法采用化学比色法,对24例白癜风患者白斑和非白斑(正常部位皮肤)以及10例健康者组织液进行过氧化氢(H2O2)、过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-PX)检测。结果白癜风患者白斑H2O2水平(53.97±19.03)mmol/L明显高于健康组(28.98±22.81)mmol/L,进展期患者白斑H2O2水平(56.64±19.91)mmol/L明显高于非白斑(34.71±22.23)mmol/L,差异均有统计学意义(P均﹤0.01);白癜风白斑CAT水平(17.34±11.05)U/mL明显低于健康组(41.29±16.57)U/mL,差异有统计学意义(P﹤0.01),进展期白斑CAT水平(13.63±8.32)U/mL低于非白斑(35.72±16.14)U/mL,差异有统计学意义(P﹤0.05);进展期患者的白斑与非白斑处GSH-PX均高于健康组,差异有统计学意义(P均﹤0.05)。结论白癜风发病可能与H2O2增高、CAT降低等氧化-抗氧化失衡有关。     

白癜风患者血清过氧化氢、过氧化氢酶和谷胱甘肽过氧化物酶的检测

目的探讨体内氧化物和抗氧化物与白癜风发病的关系。方法分别检测40例白癜风患者和10例健康对照者的血清过氧化氢(H2O2)、过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-PX)。结果白癜风患者CAT浓度(9.31±6.52)U/mL明显低于对照组(33.05±9.47)U/mL,其进展期CAT浓度(7.3±6.01)U/mL明显低于稳定期(13.05±6.11)U/mL,差异均有统计学意义(P均<0.01);而白癜风患者H2O2和GSH-PX水平与对照组比较,差异无统计学意义(P>0.05)。结论白癜风的发生可能与血清氧化物—抗氧化物水平的变化有一定的相关性。     

银屑病患者抗氧化能力及8-异前列腺素F2α的检测及意义

目的 探讨银屑病患者血清及皮损中8-异前列腺素F2α的水平和血清抗氧化防御水平及其与疾病严重程度的关系.方法 分光光度法测定50例寻常性银屑病患者及15例健康对照血清总抗氧化能力(T-AOC)水平及抗氧化酶包括超氧化物岐化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化酶(GSH-Px)的活性.分别采用酶联免疫吸附试验和免疫组化SP法检测患者及健康对照血清、皮损中8-异前列腺素F2α的表达水平.结果 银屑病患者血清T-AOC水平为(12.78±7.75) U/ml,SOD活性为(28.91±9.35) U/ml,GSH-Px活性为(180.64±47.70)U,较健康对照组[T-AOC (23.17±8.81) U/ml,SOD(51.36±7.92) U/ml,GSH-Px(244.20±66.68) U]显著下降(P值均＜0.01),且重度患者组T-AOC水平[(9.06±5.30) U/ml]、SOD活性[(21.63±5.28)U/ml]较轻中度患者组[T-AOC(15.27±8.18)U/ml,SOD (33.76±8.28) U/ml]下降更为明显(P值均＜ 0.01),轻中度患者CAT活性[(36.92±11.31) U/ml]显著高于对照组[(28.55±8.57)U/ml,P＜ 0.05]及重度患者[(24.15±9.36) U/ml,P＜ 0.01],患者血清及皮损中8-异前列腺素F2α水平[(88.77±25.27) ng/L,0.0186±0.0082]较健康对照组[(38.34±8.94) ng/L,0.0027±0.0014]升高(P值均＜0.01),且重度患者组[(114.24±13.93) ng/L,0.0279±0.0027]较轻中度患者组[(71.78±14.35) ng/L,0.0125±0.0030]升高更为明显(P值均＜0.01).患者T-AOC水平以及SOD、CAT活性与银屑病面积和皮损严重程度指数(PASI)评分均呈负相关,r值分别为-0.384、-0.573、-0.444,P值均＜0.01.血清及皮损中8-异前列腺素F2α水平均与PASI评分呈正相关,r值分别为0.710、0.783,P值均＜0.01.结论 银屑病患者血清及皮损处8-异前列腺素F2α水平较以往的氧化应激指标或许更能反映机体氧化应激状态.     

京尼平苷通过P13K-Akt途径拮抗黑素细胞氧化损伤北大核心CSCD

目的 探讨京尼平苷对体外培养的人黑素细胞氧化损伤的拮抗作用,以及PI3K-Akt途径在其中的作用。方法 取健康青少年环切术后包皮,分离并培养表皮黑素细胞。取第2 ～ 3代黑素细胞,分为对照组（不做任何处理）、京尼平苷组（125 μmol/L京尼平苷处理）、LY294002组（5 μmol/L LY294002处理）、H2O2组（250 μmol/L H2O2处理）、京尼平苷 ＋ H2O2组（125 μmol/L京尼平苷处理24 h后,加入250 μmol/L H2O2作用4 h）、京尼平苷 ＋ LY294002 ＋ H2O2组（125 μmol/L京尼平苷处理24 h后,加入5 μmol/L LY294002作用1 h,然后用 250 μmol/L H2O2作用4 h）。作用完成后,用噻唑蓝（MTT）法检测黑素细胞增殖活性,Western印迹检测Akt、磷酸化Akt（p-Akt）、血红素加氧酶1（HO-1）、谷胱甘肽过氧化物酶1（GPx-1）蛋白的表达,生物化学方法检测超氧化物歧化酶（SOD）、过氧化氢酶（CAT）活性,流式细胞仪检测细胞内活性氧（ROS）含量。通过单因素方差分析（ANOVA）对各组间数据进行比较,采用SNK-q检验进行组间两两比较。结果 H2O2组细胞增殖率较对照组明显降低（P 〈 0.01）,p-Akt（P 〈 0.01）、HO-1（P 〈 0.01）、GPx-1（P 〈 0.05）蛋白表达水平下降,SOD活性、CAT活性降低（均P 〈 0.01）,ROS含量显著升高（P 〈 0.01）。与H2O2组相比,京尼平苷＋ H2O2组黑素细胞增殖率上升（72.98% ± 8.92%比50.53% ± 10.85%,P 〈 0.05）,p-Akt（P 〈 0.05）、HO-1（P 〈 0.01）、GPx-1（P 〈 0.01）蛋白表达上调,SOD［（6.82 ± 1.03） U/mg比（1.29 ± 0.43 ） U/mg,P 〈 0.05］和CAT［（46.08 ± 4.16） U/mg比（18.71 ± 3.09） U/mg,P 〈 0.05］酶活性增高,ROS含量（1 284.33 ± 110.64比2 158 ± 222.75,P 〈 0.01）减少;京尼平苷 ＋ LY294002 ＋ H2O2组黑素细胞增殖率（44.35% ± 14.85%）较京尼平苷 ＋ H2O2组降低（P 〈 0.05）,p-Akt（P 〈 0.01）、HO-1（P 〈 0.05）、GPx-1（P 〈 0.01）蛋白表达下调,SOD活性［（1.31 ± 0.65） U/mg,P 〈 0.05］和CAT活性［（23.25 ± 5.56） U/mg,P 〈 0.05］减弱,ROS含量增加（1 668 ± 62.03,P 〈 0.05）。结论 京尼平苷可通过PI3K-Akt途径促进黑素细胞HO-1和GPx-1表达,增强SOD和CAT活性,拮抗黑素细胞氧化应激损伤。     

过氧化氢对黑素细胞生物学作用的研究

目的:研究不同浓度的过氧化氢(H2O2)对体外培养的正常人表皮黑素细胞的生物学作用.方法:分别以0.05、0.1、0.5、1 mmo1/L的H2O2作用于体外培养的黑素细胞24 h,采用多巴氧化法测定酪氨酸酶活性;NaOH裂解法测定黑素合成;比色法测定丙二醛(MDA)含量.结果:正常人表皮黑素细胞经H202处理后,酪氨酸酶活性降低,黑素合成量减少,丙二醛含量增多,其中以0.5、1 mmol/L的H2O2作用明显,与对照组相比有统计学意义(P＜0.05).结论:H2O2在-定浓度时可抑制正常人表皮黑素细胞酪氨酸酶活性,减少黑素合成,并可致细胞过氧化损伤.提示H2O2在白癜风发病中可能起到一定作用.     

银屑病患者抗氧化能力及8-异前列腺素F2α的检测及意义北大核心CSCD

目的 探讨银屑病患者血清及皮损中8-异前列腺素F2？琢的水平和血清抗氧化防御水平及其与疾病严重程度的关系。方法 分光光度法测定50例寻常性银屑病患者及15例健康对照血清总抗氧化能力（T-AOC）水平及抗氧化酶包括超氧化物岐化酶（SOD）、过氧化氢酶（CAT）、谷胱甘肽过氧化酶（GSH-Px）的活性。分别采用酶联免疫吸附试验和免疫组化SP法检测患者及健康对照血清、皮损中8-异前列腺素F2？琢的表达水平。结果 银屑病患者血清T-AOC水平为（12.78 ± 7.75） U/ml,SOD活性为（28.91 ± 9.35） U/ml,GSH-Px活性为（180.64 ± 47.70） U,较健康对照组［T-AOC （23.17 ± 8.81） U/ml,SOD（51.36 ± 7.92） U/ml,GSH-Px（244.20 ± 66.68） U］显著下降（P值均 〈 0.01）,且重度患者组T-AOC水平［（9.06 ± 5.30） U/ml］、SOD活性［（21.63 ± 5.28） U/ml］较轻中度患者组［T-AOC（15.27 ± 8.18） U/ml,SOD （33.76 ± 8.28） U/ml］下降更为明显（P值均 〈 0.01）,轻中度患者CAT活性［（36.92 ± 11.31） U/ml］显著高于对照组［（28.55 ± 8.57） U/ml,P 〈 0.05］及重度患者［（24.15 ± 9.36） U/ml,P 〈 0.01］,患者血清及皮损中8-异前列腺素F2？琢水平［（88.77 ± 25.27） ng/L,0.0186 ± 0.0082］较健康对照组［（38.34 ± 8.94） ng/L,0.0027 ± 0.0014］升高（P值均 〈 0.01）,且重度患者组［（114.24 ± 13.93） ng/L,0.0279 ± 0.0027］较轻中度患者组［（71.78 ± 14.35） ng/L,0.0125 ± 0.0030］升高更为明显（P值均 〈 0.01）。患者T-AOC水平以及SOD、CAT活性与银屑病面积和皮损严重程度指数（PASI）评分均呈负相关,r值分别为-0.384、-0.573、-0.444,P值均 〈 0.01。血清及皮损中8-异前列腺素F2？琢水平均与PASI评分呈正相关,r值分别为0.710、0.783,P值均 〈 0.01。结论 银屑病患者血清及皮损处8-异前列腺素F2？琢水平较以往的氧化应激指标或许更能反映机体氧化应激状态。     

白癜风患者血清巨噬细胞移动抑制因子和肿瘤坏死因子α的表达

目的 探讨白癜风患者血清中巨噬细胞移动抑制因子(MIF)和肿瘤坏死因子α(TNF-α)水平的变化及临床意义.方法 酶联免疫吸附试验和放射免疫法检测66例白癜风患者和30例健康对照血清MIF和TNF-α的表达.结果 寻常型白癜风患者组和健康对照组血清MIF水平分别为(9.56±1.65) μg/L和(5.18±0.81) μg/L,TNF-α水平分别为(2.38±0.37) μg/L和(1.78±0.21) μg/L,寻常型白癜风患者组均显著高于健康对照组(P值均＜ 0.01).寻常型白癜风患者血清MIF和TNF-α水平呈正相关(r=0.89,P＜ 0.05).节段型白癜风患者组血清MIF和TNF-α水平与健康对照组比较,差异均无统计学意义(P＞0.05).进展期白癜风患者血清MIF水平显著高于稳定期(P＜0.01).结论 MIF和TNF-α可能在白癜风的发病机制中起一定作用.MIF与寻常型白癜风的活动性可能有关.     

茶多酚对白癜风患者CD8+T淋巴细胞分泌肿瘤坏死因子α、干扰素γ和白介素2受体影响

目的 检测CD8+T淋巴细胞分泌细胞因子及受体在白癜风患者外周血中的表达情况及意义,并探讨茶多酚对其表达的影响.方法 分离和培养12例进展期白癜风、12例稳定期患者和10例健康人外周血CD8+T淋巴细胞,与茶多酚100 mg/L共培养,酶联免疫吸附试验(ELISA)检测茶多酚处理前后肿瘤坏死因子(TNF)-α、干扰素(IFN)-γ和白介素-2受体(IL-2R)的浓度.用t检验和方差分析检测不同组间及处理前后各因子水平的差异.结果 进展期白癜风组、稳定期白癜风组和健康对照组外周血CD8+T淋巴细胞分泌TNF-α的浓度依次降低,分别为(191.302±6.077) ng/L、(175.966±2.467) ng/L、(173.664±3.600) ng/L,IFN-γ的浓度依次升高,分别为(280.182±36.07) ng/L、(371.670±24.352)ng/L、(447.147±8.432)ng/L,IL-2R的浓度同样依次升高,分别为(8.375±0.161) μg/L、(8.845±0.161) μg/L、(9.345±0.125) μg/L.进展期白癜风组与稳定期白癜风组和健康对照组相比较,3种指标差异均有统计学意义(P＜ 0.05或0.01).经茶多酚处理2d后,进展期白癜风组、稳定期白癜风组和健康对照组TNF-α水平均明显降低至(164.797±1.784) ng/L、(166.150±3.576) ng/L、(155.028±5.759) ng/L,与处理前比较差异均有统计学意义(均P＜0.05);稳定期白癜风组IFN-γ浓度升高,而进展期白癜风组和健康对照组则有降低,各组IL-2R水平均有升高,但差异均无统计学意义(均P＞ 0.05).结论 白癜风患者外周血CD8+T淋巴细胞分泌的细胞因子及受体的变化可能与白癜风诱发或进展相关.茶多酚可能通过降低CD8+T淋巴细胞分泌TNF-α治疗白癜风.     

阿萨希毛孢子菌抗氧化酶活性研究

目的观察和测定44株不同来源阿萨希毛孢子菌(Trichosporon asahii,T.asahii)抗氧化酶活性。方法收集44株不同来源T.asahii,将其分为环境组(3株)、临床组(9株)、体内传代组(20株)和体外耐药组(12株),分别用羟胺法和可见光法测定其抗氧化酶超氧化物歧化酶(superoxide dismutase,SOD)和过氧化氢酶(catalase,CAT)活性,并进行比较和分析。结果环境组:SOD酶活性均值为(4.01±0.66)U/mgprot,CAT酶活性均值为(48.51±7.60)U/mgprot;临床组:SOD酶活性均值为(10.45±3.87)U/mgprot,CAT酶活性均值为(110.56±35.77)U/mgprot;体内传代组:至传代第5代,菌株SOD酶活性均值为(8.65±4.15)U/mgprot,CAT酶活性均值为(71.36±12.19)U/mgprot;耐药组:至诱导末期第10代菌株SOD酶活性均值为(8.02±1.56)U/mgprot,CAT酶活性均值为(80.43±8.92)U/mgprot。结论 T.asahii具有较强的抗氧化能力。不同来源T.asahii抗氧化能力不同,主要体现在抗氧化酶活性的不同。其中,临床组菌株抗氧化能力最强,体内传代组菌株和体外耐药组菌株次之,环境组菌株最低。     

白癜风患者黑素细胞移植的疗效与白介素6、可溶性白介素6受体水平的关系

【摘要】 目的 探讨白介素6（IL-6）、可溶性白介素6受体（sIL-6R）与白癜风患者自体培养黑素细胞移植疗效的关系。 方法 对53例稳定期白癜风患者进行自体培养黑素细胞移植,收集白斑区与非白斑区的疱液,移植后6个月观察疗效,用ELISA的方法测定白癜风患者皮肤组织液中IL-6及sIL-6R水平,比较移植成功组与失败组白斑区及非白斑区组织液中IL-6及sIL-6R水平。 结果 白癜风患者白斑区IL-6（113.22 ± 81.20） ng/L与非白斑区（84.40 ± 48.78） ng/L,及白斑区sIL-6R（56.28 ± 24.87） ng/L和非白斑区（53.96 ± 25.67） ng/L配对比较,差异有统计学意义。移植失败组与成功组比较：白斑区IL-6（153.61 ± 100.26） ng/L的浓度明显高于移植成功组（88.75 ± 55.75） ng/L（P < 0.05）;非白斑区浓度（100.26 ± 55.17） ng/L与（74.78 ± 42.50） ng/L比较,差异无统计学意义,两组之间sIL-6R的浓度比较,差异均无统计学意义。稳定时间 < 1年的白斑区IL-6（148.46 ± 88.00） ng/L与非白斑区（114.82 ± 64.66） ng/L均高于稳定时间 ≥ 1年的白斑区（93.54 ± 71.07） ng/L与非白斑区（67.40 ± 25.23） ng/L（P < 0.05）,而sIL-6R比较,差异无统计学意义。节段型白斑区IL-6（77.33 ± 61.70） ng/L明显低于非节段型（131.68 ± 84.54） ng/L（P < 0.05）,非白斑区IL-6及sIL-6R的组间比较,差异均无统计学意义。非节段型患者的移植成功组非白斑区IL-6（78.25 ± 40.30） ng/L、白斑区（96.27 ± 53.390） ng/L与失败组非白斑区（107.02 ± 42.48） ng/L、白斑区（178.90 ± 96.48） ng/L比较,差异均有统计学意义,sIL-6R在两组间比较,差异无统计学意义。 结论 IL-6在组织液中的异常表达对白癜风患者皮损区的微环境改变有一定的影响,可能与自体黑素细胞移植疗效相关。     

Vitronectin in normal human skin and in skin lesions]

Vitronectin (S-protein of complement, serum spreading factor) is a multifunctional glycoprotein present in human plasma and in the elastic tissue of various organs. It belongs to the group of adhesion proteins and is of importance in the terminal stages of both the coagulation and complement system and in fibrinolysis. In human skin it is localized on dermal elastic fibers and on pathologically altered elastic material (solar elastosis, pseudoxanthoma elasticum) as well as on keratin filament material such as keratin bodies in lichen planus or amyloid deposits in localized cutaneous amyloid. It is also found in the abnormally thickened cutaneous blood vessels in erythropoietic protoporphyria and porphyria cutanea tarda. Late-stage inhibition of the complement cascade in bullous disorders in which activation of the complement system is of pathogenetic significance may be an additional important function of vitronectin in skin diseases.     

Exosomes in chronic inflammatory skin diseases and skin tumors

Exosomes are membrane vesicles of endocytic origin that can mediate communication between cells and the transport of cellular components such as microRNAs, mRNAs, proteins and DNA. Recently, exosomes have been under investigation for their significant roles in both healthy physiology and disease states. Herein, we review the role of exosomes in chronic inflammatory skin diseases and skin tumors, especially focusing on systemic lupus erythematosus, psoriasis, atopic dermatitis, bullous pemphigoid and melanoma. Moreover, we emphasize the involvement of changes in exosome cargo in the regulation of these diseases.     

Basal transepidermal water loss, skin thickness, skin blood flow and skin colour in relation to sodium-lauryl-sulphate- induced irritation in normal skin

The influence of basal transepidermal water loss (TEWL), skin thickness, blood flow and skin colour on susceptibility to sodium-lauryl-sulphate(SLS)-induced irritant contact dermatitis was studied in 70 healthy volunteers. SLS 0.5% was applied as a patch test. For assessment of basal values and skin response to SLS, bioengineering methods were used: TEWL was measured by an evaporimeter, skin thickness by ultrasound A-scan, blood flow by laser Doppler flowmetry, and skin colour by a colorimeter, using the L*a*b* system of the Commission Internationale de l'Eclairage (CIE). By use of multiple regression analysis, it was demonstrated that basal TEWL was substantially related to skin susceptibility to SLS, high basal TEWL predicting an increased susceptibility to SLS. Also increased light reflection from the skin, indicating a 'fair' skin, was found to be associated with increased susceptibility to SLS.     

Expression of transferrin receptor in normal human skin, psoriatic skin and various skin tumors

The distribution of transferrin receptor in normal human skin and its expression in psoriatic skin and various skin tumors have been investigated. Immuno-peroxidase staining was performed on biopsy specimens using monoclonal OKT 9 antibody, which reacts with transferrin receptor. Normal human skin showed positive staining with OKT 9 in eccrine glands and outer root sheaths of the hair. Sebaceous glands were also strongly positive. The basal layer stained very weakly. Psoriatic skin expressed OKT 9 strongly in the epidermis, especially in the area of the rete ridge. In squamous cell carcinoma, Bowen's disease, and malignant melanoma, a widespread and strong labelling reaction was found. Basal cell epithelioma and genital Paget's disease were partially and moderately positive in their staining pattern. No such positive staining pattern could be found in either nevus cell nevi or seborrhoic keratosis. These findings indicate that, in normal skin, transferrin receptor exists in eccrine glands, sebaceous glands, and outer root sheaths of the hair in greater amounts. High amounts of expression of this receptor in psoriatic epidermis and malignant tumors suggests that immunohistochemical demonstration of transferrin receptor parallels the proliferating activity of the tissue or tumor of the skin and may provide an useful aid for detecting such conditions.     

A novel niche for skin derived precursors in non-follicular skin

BackgroundSkin derived precursors (SKP) comprise a subset of specialized dermal cells that can be distinguished from fibroblast by their capacity for spheroidal growth. Recent investigations have shown that hair follicles constitute a niche for this cell type, but their localization and their definite function in non-follicular skin remains largely unknown.ObjectiveTo identify the dermal niche of non-follicular SKPs and to analyze whether functional aspects correlate with this localization.MethodsSKPs were isolated from separate anatomical regions of human abdominal skin. Fluorescence activated cell sorting then was used to obtain a pure population of non-follicular SKPs. Functional characterization of these cells was performed applying differentiation and proliferation assays. Information on specific in vivo functions was derived from histological evaluation of quantity and localization patterns.ResultsSphere forming capacity and differentiation assays show that SKPs reside in the papillary part of the dermis. Further delineation revealed that the dermal capillaries represent a niche for these cells which subsequently could be isolated by FACS utilizing a perivascular marker. Whereas functional properties described for follicular SKPs could also be detected in the perivascular SKP population, histological analyses additionally point to a cross-talk with epidermal stem cells and a reduction during chronological aging.ConclusionOur data show that SKPs isolated from non-follicular skin originate from a perivascular niche. Compared to their follicular counterparts, no functional differences could be observed upon cultivation, but ex vivo analyses also point to unique functions and a contribution to the phenotype of aged skin.     

几种婴儿常见皮肤病的皮肤微生态研究进展

近年来报道婴儿期皮肤病可能与局部皮肤微生态失调关系较密切,本文综述了婴儿期特应性皮炎、新生儿痤疮、脂溢性皮炎、新生儿红斑和皮肤微生态关系。