Janus活化激酶（Janus activated kinase,JAK）/信号转导与转录激活子（signal transducer and activator of transcriptions,STAT）途径介导了炎症性肠病的发生和发展[1]。黄芪多糖（Astragalus polysaccharides,APS）是黄芪的主要活...Janus活化激酶（Janus activated kinase,JAK）/信号转导与转录激活子（signal transducer and activator of transcriptions,STAT）途径介导了炎症性肠病的发生和发展[1]。黄芪多糖（Astragalus polysaccharides,APS）是黄芪的主要活性成分之一,可有效治疗实验性结肠炎[2],展开更多
对长江下游稻麦两熟农田生态系统2009—2010年的CH4和N2O排放以及土壤碳固定进行了分析,初步研究了秸秆还田对稻麦两熟高产农田净增温潜势的影响。结果表明,秸秆还田对稻麦两熟高产农田周年CH4和N2O排放总量、土壤碳固定量以及净增温潜...对长江下游稻麦两熟农田生态系统2009—2010年的CH4和N2O排放以及土壤碳固定进行了分析,初步研究了秸秆还田对稻麦两熟高产农田净增温潜势的影响。结果表明,秸秆还田对稻麦两熟高产农田周年CH4和N2O排放总量、土壤碳固定量以及净增温潜势均有显著或极显著影响:秸秆还田条件下周年CH4、N2O排放总量分别为394 kg CH4.hm-2、2.39 kg N2O.hm-2,土壤碳固定量、净增温潜势分别为1.14 t C·hm-2、6383 kg CO2-equivalents·hm-2;较秸秆不还田增加CH4排放总量152%、减少N2O排放总量14%、增加土壤碳固定量531%、增加净增温潜势57%。以上结果表明,秸秆还田使短期内稻麦两熟高产农田的温室效应明显提高,但其长期效果如何还有待观测。展开更多
SOCS1 is a key regulator of cytokine signaling and is important for maintaining balance in the immune system. It is thought to participate in negative feedback loops in cytokine signaling and may be an important signa...SOCS1 is a key regulator of cytokine signaling and is important for maintaining balance in the immune system. It is thought to participate in negative feedback loops in cytokine signaling and may be an important signal for the regulation of dendritic cell （DC） maturation. However, it remains unclear whether DCs transduced with SOCS1 exhibit characteristics of regulatory DCs and induce allogeneic T-cell hyporesponsiveness. In this study, we constructed adenovirai vector coding SOCS1 （Ad-SOCS1） that can efficiently increase SOCS1 gene expression in bone marrow-derived dendritic cells. DCs transduced with Ad-SOCS1 （DC-SOCS1） expressed low levels of costimulatory and MHC molecules, were resistant to maturation and activation stimulation, induced allogeneic T-cell hyporesponsiveness, and promoted the generation of regulatory-like T cells in vitro. DC-SOCS1 pretreatment significantly prolonged the survival of ailografts and led to a substantial increase in the generation of regulatory T cells. Our data suggest that SOCS1 inhibits DC maturation and induces regulatory DC generation, therefore possessing therapeutic potential to prevent rejection in organ transplantation.展开更多
目的:研究正常早孕绒毛及蜕膜组织细胞因子信号转导负调控因子(Suppressors of cytok ine signaling,SOCS)基因和蛋白水平表达,以揭示SOCS在母胎界面生理性调节作用。方法:半定量RT-PCR检测早孕绒毛组织、蜕膜组织及原代培养早孕滋养细...目的:研究正常早孕绒毛及蜕膜组织细胞因子信号转导负调控因子(Suppressors of cytok ine signaling,SOCS)基因和蛋白水平表达,以揭示SOCS在母胎界面生理性调节作用。方法:半定量RT-PCR检测早孕绒毛组织、蜕膜组织及原代培养早孕滋养细胞、蜕膜基质细胞SOCS1、SOCS2、SOCS3mRNA水平;W estern b lot检测早孕绒毛组织及蜕膜组织SOCS1、SOCS2、SOCS3蛋白表达;免疫组化定位SOCS1、SOCS2、SOCS3在早孕绒毛组织、蜕膜组织表达;ELISA检测滋养细胞、蜕膜基质细胞分泌IL-10、IFNγ-。结果:正常母胎界面见SOCS1、SOCS2、SOCS3基因表达,其中SOCS3绒毛/蜕膜阳性率73.7%/71.1%;SOCS2绒毛/蜕膜阳性率50.0%/39.5%,SOCS1最少,绒毛/蜕膜阳性率34.2%/31.6%;SOCS1、SOCS2、SOCS3蛋白表达与转录水平基本一致;正常母胎界面SOCS1、SOCS2、SOCS3表达主要定位于绒毛滋养细胞和蜕膜间质;体外无血清培养滋养细胞和蜕膜基质细胞SOCS2、SOCS3低表达,SOCS1未见表达,其分泌的IL-10随时间而增高(P<0.05)。结论:正常早孕母胎界面表达SOCS1、SOCS2、SOCS3,无刺激条件下滋养细胞和蜕膜基质细胞低表达SOCS2、SOCS3,SOCS在正常妊娠Th平衡中具有重要意义。展开更多
细胞因子信号传导抑制蛋白(suppressor of cytokine signaling,SOCS)家族是一类由细胞产生并反馈性阻断细胞因子信号转导过程的负性调节因子,最先发现的是SOCS-1。SOCS-1可抑制IL-6、LIF、OSM、INF-γ以及GH等多种细胞因子的信号转导,...细胞因子信号传导抑制蛋白(suppressor of cytokine signaling,SOCS)家族是一类由细胞产生并反馈性阻断细胞因子信号转导过程的负性调节因子,最先发现的是SOCS-1。SOCS-1可抑制IL-6、LIF、OSM、INF-γ以及GH等多种细胞因子的信号转导,对体内多种免疫反应的激活起调控作用。SOCS-1异常表达与多种疾病的发病相关,在急慢性白血病、类风湿性关节炎、肝硬化和肝癌的发病中起重要作用。本文就SOCS-1与细胞因子的关系及其临床研究进展进行综述。展开更多
Suppressor of cytokine signaling （SOCS） 1 plays a crucial role in the immune response and might contribute to the prognoses of liver failure treated with glucocorticoid. We recruited 47 acute-on-chronic hepatitis B ...Suppressor of cytokine signaling （SOCS） 1 plays a crucial role in the immune response and might contribute to the prognoses of liver failure treated with glucocorticoid. We recruited 47 acute-on-chronic hepatitis B liver failure （ACHBLF） patients receiving glucocorticoid treatment and 30 healthy controls to determine the potential effects of glucocorticoid on the transcriptional level of SOCS1 in peripheral blood mononuclear cells. On the third and twenty-eighth days of glucocorticoid treatment, SOCS1 expression was negatively correlated with model for end-stage liver disease （MELD） score. Interleukin-6 （IL-6） and tumor-necrosis factor-a （＇I＇NF-a） levels were statistically lower, while the SOCS1 transcription level was higher in survivors than non-survivors both in pre- and post-treatment ACHBLF patients. The methylation rate of the SOCS1 promoter in ACHBLF patients was higher than in healthy control patients as determined by methylation-specific polymerase chain reaction. The mRNA level of SOCS1 in methylated promoters was significantly lower than from patients with unmethylated SOCS1 promoters, interferon （IFN）-y-responsive and STATl-dependent gene expression was higher in survivors and was dramatically decreased with rising expression of SOCS1 after glucocorticoid treatment. Mortality rates were significantly higher in methylated patients than for those without methylation at the end of a 90-day follow-up. Furthermore, we found that five in six surviving patients displayed demethylated SOCS1 on the twenty-eighth day after treatment, while that number was 3 in 10 in the non-survivors. These findings suggested that ACHBLF patients without SOCS1 methylation may have a favorable response to corticosteroid treatment.展开更多
细胞因子信号转导抑制因子(suppressor of cytokine signaling,SOCS)是一类可由多种细胞因子诱导产生,又能通过多种途径对细胞因子的信号转导进行负向调节的蛋白质分子。众多研究发现SOCS蛋白家族是一个非常重要的可以负向调节JAK/STAT...细胞因子信号转导抑制因子(suppressor of cytokine signaling,SOCS)是一类可由多种细胞因子诱导产生,又能通过多种途径对细胞因子的信号转导进行负向调节的蛋白质分子。众多研究发现SOCS蛋白家族是一个非常重要的可以负向调节JAK/STAT信号通路的分子家族。本文将着重阐述介绍SOCS家族在炎症和自身免疫性疾病中的作用。展开更多
目的观察细胞因子信号负调控因子3(suppressors of cytokine signaling,SOCS3)对人肺腺癌细胞株A549迁移和侵袭能力的影响,并初步探讨其机制。方法建立SOCS3稳定表达细胞株;Boyden Chamber分析法测定细胞的迁移和侵袭能力;半定量RT-PCR...目的观察细胞因子信号负调控因子3(suppressors of cytokine signaling,SOCS3)对人肺腺癌细胞株A549迁移和侵袭能力的影响,并初步探讨其机制。方法建立SOCS3稳定表达细胞株;Boyden Chamber分析法测定细胞的迁移和侵袭能力;半定量RT-PCR检测细胞基质金属蛋白酶(matrix metalloproteinases,MMPs)2,9mRNA表达;明胶酶谱分析法测定MMP2,9蛋白活性水平。结果SOCS3稳定表达株细胞迁移和侵袭能力显著下降(P<0.05);半定量RT-PCR和明胶酶谱分析结果显示SOCS3可显著抑制MMP2,9表达和活性(P<0.05)。结论SOCS3能通过抑制MMP2,9表达和活性明显降低A549的体外迁移和侵袭能力。展开更多
文摘Janus活化激酶（Janus activated kinase,JAK）/信号转导与转录激活子（signal transducer and activator of transcriptions,STAT）途径介导了炎症性肠病的发生和发展[1]。黄芪多糖（Astragalus polysaccharides,APS）是黄芪的主要活性成分之一,可有效治疗实验性结肠炎[2],
文摘对长江下游稻麦两熟农田生态系统2009—2010年的CH4和N2O排放以及土壤碳固定进行了分析,初步研究了秸秆还田对稻麦两熟高产农田净增温潜势的影响。结果表明,秸秆还田对稻麦两熟高产农田周年CH4和N2O排放总量、土壤碳固定量以及净增温潜势均有显著或极显著影响:秸秆还田条件下周年CH4、N2O排放总量分别为394 kg CH4.hm-2、2.39 kg N2O.hm-2,土壤碳固定量、净增温潜势分别为1.14 t C·hm-2、6383 kg CO2-equivalents·hm-2;较秸秆不还田增加CH4排放总量152%、减少N2O排放总量14%、增加土壤碳固定量531%、增加净增温潜势57%。以上结果表明,秸秆还田使短期内稻麦两熟高产农田的温室效应明显提高,但其长期效果如何还有待观测。
基金supported by grants from the National Key Basic Research Program of China (2009CB522402)the National Natural Science Foundation of China (30571756, 30772056, 30772046, U0832009).
文摘SOCS1 is a key regulator of cytokine signaling and is important for maintaining balance in the immune system. It is thought to participate in negative feedback loops in cytokine signaling and may be an important signal for the regulation of dendritic cell （DC） maturation. However, it remains unclear whether DCs transduced with SOCS1 exhibit characteristics of regulatory DCs and induce allogeneic T-cell hyporesponsiveness. In this study, we constructed adenovirai vector coding SOCS1 （Ad-SOCS1） that can efficiently increase SOCS1 gene expression in bone marrow-derived dendritic cells. DCs transduced with Ad-SOCS1 （DC-SOCS1） expressed low levels of costimulatory and MHC molecules, were resistant to maturation and activation stimulation, induced allogeneic T-cell hyporesponsiveness, and promoted the generation of regulatory-like T cells in vitro. DC-SOCS1 pretreatment significantly prolonged the survival of ailografts and led to a substantial increase in the generation of regulatory T cells. Our data suggest that SOCS1 inhibits DC maturation and induces regulatory DC generation, therefore possessing therapeutic potential to prevent rejection in organ transplantation.
文摘目的:研究正常早孕绒毛及蜕膜组织细胞因子信号转导负调控因子(Suppressors of cytok ine signaling,SOCS)基因和蛋白水平表达,以揭示SOCS在母胎界面生理性调节作用。方法:半定量RT-PCR检测早孕绒毛组织、蜕膜组织及原代培养早孕滋养细胞、蜕膜基质细胞SOCS1、SOCS2、SOCS3mRNA水平;W estern b lot检测早孕绒毛组织及蜕膜组织SOCS1、SOCS2、SOCS3蛋白表达;免疫组化定位SOCS1、SOCS2、SOCS3在早孕绒毛组织、蜕膜组织表达;ELISA检测滋养细胞、蜕膜基质细胞分泌IL-10、IFNγ-。结果:正常母胎界面见SOCS1、SOCS2、SOCS3基因表达,其中SOCS3绒毛/蜕膜阳性率73.7%/71.1%;SOCS2绒毛/蜕膜阳性率50.0%/39.5%,SOCS1最少,绒毛/蜕膜阳性率34.2%/31.6%;SOCS1、SOCS2、SOCS3蛋白表达与转录水平基本一致;正常母胎界面SOCS1、SOCS2、SOCS3表达主要定位于绒毛滋养细胞和蜕膜间质;体外无血清培养滋养细胞和蜕膜基质细胞SOCS2、SOCS3低表达,SOCS1未见表达,其分泌的IL-10随时间而增高(P<0.05)。结论:正常早孕母胎界面表达SOCS1、SOCS2、SOCS3,无刺激条件下滋养细胞和蜕膜基质细胞低表达SOCS2、SOCS3,SOCS在正常妊娠Th平衡中具有重要意义。
文摘细胞因子信号传导抑制蛋白(suppressor of cytokine signaling,SOCS)家族是一类由细胞产生并反馈性阻断细胞因子信号转导过程的负性调节因子,最先发现的是SOCS-1。SOCS-1可抑制IL-6、LIF、OSM、INF-γ以及GH等多种细胞因子的信号转导,对体内多种免疫反应的激活起调控作用。SOCS-1异常表达与多种疾病的发病相关,在急慢性白血病、类风湿性关节炎、肝硬化和肝癌的发病中起重要作用。本文就SOCS-1与细胞因子的关系及其临床研究进展进行综述。
基金ACKNOWLEDGEMENTS This work was supported by grants from the Key Project of Chinese Ministry of Science and Technology （2012ZX10002007, 2013ZX 10002001） and National Natural Science Foundation of China （81171579, 81201287）.
文摘Suppressor of cytokine signaling （SOCS） 1 plays a crucial role in the immune response and might contribute to the prognoses of liver failure treated with glucocorticoid. We recruited 47 acute-on-chronic hepatitis B liver failure （ACHBLF） patients receiving glucocorticoid treatment and 30 healthy controls to determine the potential effects of glucocorticoid on the transcriptional level of SOCS1 in peripheral blood mononuclear cells. On the third and twenty-eighth days of glucocorticoid treatment, SOCS1 expression was negatively correlated with model for end-stage liver disease （MELD） score. Interleukin-6 （IL-6） and tumor-necrosis factor-a （＇I＇NF-a） levels were statistically lower, while the SOCS1 transcription level was higher in survivors than non-survivors both in pre- and post-treatment ACHBLF patients. The methylation rate of the SOCS1 promoter in ACHBLF patients was higher than in healthy control patients as determined by methylation-specific polymerase chain reaction. The mRNA level of SOCS1 in methylated promoters was significantly lower than from patients with unmethylated SOCS1 promoters, interferon （IFN）-y-responsive and STATl-dependent gene expression was higher in survivors and was dramatically decreased with rising expression of SOCS1 after glucocorticoid treatment. Mortality rates were significantly higher in methylated patients than for those without methylation at the end of a 90-day follow-up. Furthermore, we found that five in six surviving patients displayed demethylated SOCS1 on the twenty-eighth day after treatment, while that number was 3 in 10 in the non-survivors. These findings suggested that ACHBLF patients without SOCS1 methylation may have a favorable response to corticosteroid treatment.
文摘细胞因子信号转导抑制因子(suppressor of cytokine signaling,SOCS)是一类可由多种细胞因子诱导产生,又能通过多种途径对细胞因子的信号转导进行负向调节的蛋白质分子。众多研究发现SOCS蛋白家族是一个非常重要的可以负向调节JAK/STAT信号通路的分子家族。本文将着重阐述介绍SOCS家族在炎症和自身免疫性疾病中的作用。
