Objective:To further illuminate a possibme mechanism of Fas/FasL in the treatment of psoriasis, the expression of it and apoptosis of KC were investigated. Methods: With cell culture,immunocytochemistry, the expressio...Objective:To further illuminate a possibme mechanism of Fas/FasL in the treatment of psoriasis, the expression of it and apoptosis of KC were investigated. Methods: With cell culture,immunocytochemistry, the expression of Fas/FasL protein after the treatment with etretin was observed in cultured human normal keratinocytes. Then, the state of apoptosis in cultured keratinocyte after stimulation with etretin was detected with FACS(Fluorescence Activited Cell Sortor). Results:① There was no expression of Fas/FasL protein in the cultured normal human KC. ②After the treatment with etretin, the strongest expression of FasL protein appeared after 16h,so did Fas after 40h.③ The higher the concentration of etretin,the stronger the expression of Fas/FasL protien.Under the same condition,the expression of Fas is stronger than that of FasL.④ Keratinocytes' apoptosis occurred after stimulation with etretin. Conclusion: Fas/FasL system wasn't involved in apoptosis in cultured normol human keratinocytes.But during limited period, the apoptosis of KC could be induced by (etretin),thus it can antagonize benign proliferate of keratinocytes.Our data showed up-regulation of the expression of Fas/FasL and apoptosis in cultured human keratinocytes stimulated by etretin, and its function may be involved in the therapeutic machanism of psoriasis.展开更多
文摘目的探讨基于主成分分析(principal component analysis,PCA)结合Logistic回归模型分析脑脊液可溶性Fas(soluble Fas,sFas)、Fas配体(soluble Fas ligand,sFasL)水平及压力参数对创伤性颅脑损伤患者术后继发脑积水的预测价值。方法选取2018-12/2021-12月由作者医院神经外科收治的260例创伤性颅脑损伤患者作为研究对象,对其临床资料进行回顾性分析,根据术后是否发生脑积水将患者分为继发脑积水组(n=48)和无继发脑积水组(n=212)。对患者的性别、年龄、手术前后格拉斯哥昏迷量表(Glasgow coma scale,GCS)、颅脑损伤部位、手术时间、手术前后脑室系统出血、术后颅内感染、术后大面积脑梗死、手术前后中脑导水管和环池结构、术后脑脊液压力参数、术后脑脊液sFas、sFasL水平等指标进行PCA。PCA后提取主成分作为自变量,以患者术后是否出现脑积水为因变量,应用Logistic回归分析探讨相关影响因素。结果单因素分析和PCA结果显示,脑组织损伤部位、手术前后GCS评分、脑室系统内出血、导水管和环池结构,术后颅内感染、术后大面积脑梗死、术后腰穿脑脊液置换术及术后脑脊液压力(cerebrospinal fluid pressure,CSFP)、ICP相关系数(regression of amplitude and pressure,RAP)和脑脊液sFas/sFasL水平均与患者术后继发脑积水有关(P<0.05)。PCA-Logistic回归模型显示,合并颅底损伤,手术前后GCS评分降低,脑室系统内出血,导水管和环池结构不清晰,术后合并颅内感染,大面积脑梗死,脑脊液sFas、sFasL水平升高,RAP升高和CSFP升高均是颅脑损伤患者术后继发脑水肿的独立危险因素,术后进行腰穿脑脊液置换是颅脑损伤患者术后继发脑积水的保护因素(P<0.05)。结论术后脑脊液sFas、sFasL水平和压力参数均是创伤性颅脑损伤患者术后继发脑积水的独立影响因素,对患者术后并发脑积水有一定的预测价值。
文摘Objective:To further illuminate a possibme mechanism of Fas/FasL in the treatment of psoriasis, the expression of it and apoptosis of KC were investigated. Methods: With cell culture,immunocytochemistry, the expression of Fas/FasL protein after the treatment with etretin was observed in cultured human normal keratinocytes. Then, the state of apoptosis in cultured keratinocyte after stimulation with etretin was detected with FACS(Fluorescence Activited Cell Sortor). Results:① There was no expression of Fas/FasL protein in the cultured normal human KC. ②After the treatment with etretin, the strongest expression of FasL protein appeared after 16h,so did Fas after 40h.③ The higher the concentration of etretin,the stronger the expression of Fas/FasL protien.Under the same condition,the expression of Fas is stronger than that of FasL.④ Keratinocytes' apoptosis occurred after stimulation with etretin. Conclusion: Fas/FasL system wasn't involved in apoptosis in cultured normol human keratinocytes.But during limited period, the apoptosis of KC could be induced by (etretin),thus it can antagonize benign proliferate of keratinocytes.Our data showed up-regulation of the expression of Fas/FasL and apoptosis in cultured human keratinocytes stimulated by etretin, and its function may be involved in the therapeutic machanism of psoriasis.