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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 相似文献
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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. 相似文献
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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。 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献