盐析分离皮肤作狼疮带试验在七种结缔组织病中的应用

用传统ＬＢＴ法和盐析分离皮肤ＬＢＴ法分别检测ＳＬＥ１０６例，ＢＳＬＥ３例，ＳＣＬＥ８例，ＤＬＥ１０例，ＭＣＴＤ１５例，ＰＳＳ１１例，ＤＭ８例。分离皮肤ＬＢＴ法阳性率依次为８９．６％，１００％，１００％，８０％，８０％，３６％，１２．５％；传统ＬＢＴ法的阳性率依次为５０％、１０％，７５％，８０％，３３％，１８％和０。结果显示分离皮肤ＬＢＴ法敏感性高于传统ＬＢＴ法，其中６种疾病的Ｉｇ补体沉积汉真皮侧多     

药粥可祛皮肤皱纹

皮肤皱纹的产生有两种情况:一种是随着年龄增长而自然出现的正常生理衰变现象,另一种是由于身体健康受损而出现的非正常病理变化现象。皮肤分有表皮、真皮和皮下组织三层。表皮主要由角质细胞和树突细胞组成,真皮由各种结缔组织细胞和大量的胶原纤维及弹性纤维形成,皮下组织由大量的疏松结缔组织和脂肪组织形成。皮肤是人体最大的单一器官,它与人体其它器官有着相表里的连带关系,因此,人体各器官的健康状态和精神状态都会反映到皮肤上来。所以,皮肤皱纹产生的原因是很复杂的,除了正常生理衰变之外,身体虚弱,各种慢性病,贫血,营养不良,失眠,…     

小鼠DNA酶真核表达质粒在小鼠骨髓间充质干细胞中的表达

目的 将构建好的小鼠DNA酶(DNaseI)真核表达质粒转染到小鼠骨髓间充质干细胞中,观察目的基因在细胞内的表达及分泌情况.方法 采用脂质体法将已构建好的小鼠DNaseI的真核表达质粒转染人小鼠骨髓间充质干细胞中,用Western blotting法检测DNaseI基因在骨髓间充质干细胞内的表达及DNA-甲基绿比色法检测培养上清液中DNaseI的活性.结果 小鼠DNaseI的真核表达质粒能够转染入小鼠骨髓间充质干细胞中,转染效率约为30%.转染后的小鼠骨髓间充质干细胞可以表达DNaseI蛋白且分泌出具有活性的DNaseI.结论 脂质体法能够将小鼠DNaseI的真核表达质粒转染入小鼠骨髓间充质干细胞中,小鼠DNaseI基因在小鼠骨髓间充质干细胞中成功表达并分泌具有生物活性的DNaseI.     

他克莫司软膏治疗成人中、重度特应性皮炎的临床研究

目的:比较0.1%,0.03%他克莫司软膏与赋形剂治疗中、重度特应性皮炎(AD)的疗效和安全性.方法:采用随机、双盲、赋形剂平行对照临床研究方法,入选病例按1:1:1比例分为三组,分别随机接受0.1%,0.03%他克莫司软膏或赋形剂治疗,每天2次外搽患处,共3周.结果:有效率:他克莫司软膏0.1%组和0.03%组分别为88.9%和87.5%,赋形剂组为25%;治愈率:他克莫司软膏0.1%组和0.03%组分别为55.6%和50%,赋形剂组为25%,差异有统计学意义(P＜0.05).结论:他克莫司软膏(0.1%和0.03%)治疗成人中、重度特应性皮炎疗效好,安全和耐受性均良好.     

SSc患者外周血外泌体通过microRNA-21介导成纤维细胞活化北大核心CSCD

目的比较系统性硬皮病患者(systemic sclerosis,SSc)与正常人外周血外泌体(exosome)中microRNA-21-5p(miR-21-5p)的表达差异,评估外周血中外泌体对人皮肤成纤维细胞功能状态的影响。方法提取SSc患者及正常人外周血外泌体,荧光定量PCR法检测miR-21-5p表达情况;外泌体刺激人皮肤成纤维细胞,CCK-8法检测细胞增殖能力,免疫印迹检测CollagenⅠ,Ⅲ及平滑肌肌动蛋白(α-SMA)水平。结果 SSc患者外周血外泌体中miR-21-5p显著高于正常人。与正常人相比,患者外泌体可明显增强人皮肤成纤维细胞的增殖能力及上调CollagenⅠ,Ⅲ,α-SMA的水平,上述作用可被转染miR-21-5p抑制剂阻断。结论 SSc患者循环外泌体通过转运miR-21-5p介导人皮肤成纤维细胞向肌成纤维细胞分化。miR-21-5p可能是SSc潜在的生物标记物。     

红斑狼疮皮损与自身抗体之间关联的研究进展

皮肤损害是红斑狼疮惟一或主要的临床表现,发生机制未明,目前多认为是由自身抗体介导的免疫性损伤.循环中的抗核小体抗体、抗双链DNA抗体、抗Ro/SSA抗体、抗基膜带抗体等可能通过不同的机制参与了皮肤损害,但推测尚存在其他未知的因素,有待进一步研究.     

小鼠真皮间充质干细胞与成纤维细胞共培养对胶原分泌和TGF-β1表达的影响

Objective To explore the role of mouse dermis-derived mesenchymal stem cells (mdMSC) on skin repair. Methods mdMSC and human dermal fibroblasts were isolated and identified. Human dermal fibroblasts were cultured alone or eoeultured with mdMSC in Transwell chambers with the density ratio of human dermal fibroblasts to mdMSC being 2/5, 1/1, and 2/1. On day 4 and 8 of culture, the expression levels of hydroxyproline and transforming growth factor-beta (TGF-beta) 1 were measured in the supematant of monoculture and coculture by alkaline hydrolysis and ELISA respectively. Results The level of hydro-xyproline was significantly higher in the supematants of coculture system with a density ratio of 2/5 and 1/1 than that in monoculture supematants of human dermal fibroblasts on day 8 (both P < 0.05). Elevated level of TGF-betal was observed in all coculture supematants on day 8 (all P < 0.01) and in the supernatants of coculture system with a density ratio of 1/1 on day 4 (P < 0.05). There was no significant correlation between the expression level of TGF-betal and hydroxyproline in the coculture supernatants (r = 0.108, P ＞ 0.05). Conclusion In vitro coculture with mdMSC can increase the production of hydroxyproline and TGF-betal by fibroblasts, which may be a mechanism underlying the facilitation of skin repair by mdMSC.     

小鼠真皮间充质干细胞与成纤维细胞共培养对胶原分泌和TGF-β1表达的影响

Objective To explore the role of mouse dermis-derived mesenchymal stem cells (mdMSC) on skin repair. Methods mdMSC and human dermal fibroblasts were isolated and identified. Human dermal fibroblasts were cultured alone or eoeultured with mdMSC in Transwell chambers with the density ratio of human dermal fibroblasts to mdMSC being 2/5, 1/1, and 2/1. On day 4 and 8 of culture, the expression levels of hydroxyproline and transforming growth factor-beta (TGF-beta) 1 were measured in the supematant of monoculture and coculture by alkaline hydrolysis and ELISA respectively. Results The level of hydro-xyproline was significantly higher in the supematants of coculture system with a density ratio of 2/5 and 1/1 than that in monoculture supematants of human dermal fibroblasts on day 8 (both P < 0.05). Elevated level of TGF-betal was observed in all coculture supematants on day 8 (all P < 0.01) and in the supernatants of coculture system with a density ratio of 1/1 on day 4 (P < 0.05). There was no significant correlation between the expression level of TGF-betal and hydroxyproline in the coculture supernatants (r = 0.108, P ＞ 0.05). Conclusion In vitro coculture with mdMSC can increase the production of hydroxyproline and TGF-betal by fibroblasts, which may be a mechanism underlying the facilitation of skin repair by mdMSC.     

小鼠真皮间充质干细胞与成纤维细胞共培养对胶原分泌和TGF-β1表达的影响

Objective To explore the role of mouse dermis-derived mesenchymal stem cells (mdMSC) on skin repair. Methods mdMSC and human dermal fibroblasts were isolated and identified. Human dermal fibroblasts were cultured alone or eoeultured with mdMSC in Transwell chambers with the density ratio of human dermal fibroblasts to mdMSC being 2/5, 1/1, and 2/1. On day 4 and 8 of culture, the expression levels of hydroxyproline and transforming growth factor-beta (TGF-beta) 1 were measured in the supematant of monoculture and coculture by alkaline hydrolysis and ELISA respectively. Results The level of hydro-xyproline was significantly higher in the supematants of coculture system with a density ratio of 2/5 and 1/1 than that in monoculture supematants of human dermal fibroblasts on day 8 (both P < 0.05). Elevated level of TGF-betal was observed in all coculture supematants on day 8 (all P < 0.01) and in the supernatants of coculture system with a density ratio of 1/1 on day 4 (P < 0.05). There was no significant correlation between the expression level of TGF-betal and hydroxyproline in the coculture supernatants (r = 0.108, P ＞ 0.05). Conclusion In vitro coculture with mdMSC can increase the production of hydroxyproline and TGF-betal by fibroblasts, which may be a mechanism underlying the facilitation of skin repair by mdMSC.