目的探讨半乳凝素-10(galectin-10)在CD4+CD25+CD127low/-调节性T细胞(regulatory T cell,Treg)中的表达及其与Foxp3的相关性。方法通过流式细胞术分选健康人外周血和胃癌患者癌旁淋巴结中Treg细胞与CD4+CD25-CD127+T细胞,经微量抽提RNA...目的探讨半乳凝素-10(galectin-10)在CD4+CD25+CD127low/-调节性T细胞(regulatory T cell,Treg)中的表达及其与Foxp3的相关性。方法通过流式细胞术分选健康人外周血和胃癌患者癌旁淋巴结中Treg细胞与CD4+CD25-CD127+T细胞,经微量抽提RNA后,用RT-PCR检测galectin-10和Foxp3的mRNA表达水平。结果galectin-10和Foxp3的mRNA显著表达于Treg细胞,几乎不表达于CD4+CD25-CD127+T细胞。健康人外周血和胃癌患者癌旁淋巴结中的结果一致。结论ga-lectin-10基因高表达于Treg细胞中,可以作为Treg细胞一项新的标志物。展开更多
目的研究B、T淋巴细胞衰减因子(B and T lymphocyte attenuator,BTLA)及其配体疱疹病毒进入中介体(herpesvirus entry mediator,HVEM)在肺结核患者CD4^(+)CD25^(+)CD127^(low)调节性T细胞(CD4^(+)CD25^(+)CD127^(low)Treg)中的表达及其...目的研究B、T淋巴细胞衰减因子(B and T lymphocyte attenuator,BTLA)及其配体疱疹病毒进入中介体(herpesvirus entry mediator,HVEM)在肺结核患者CD4^(+)CD25^(+)CD127^(low)调节性T细胞(CD4^(+)CD25^(+)CD127^(low)Treg)中的表达及其与患者临床特征的关系。方法选取肺结核患者30例(肺结核组)和20例健康体检者(健康对照组),通过流式细胞术检测2组外周血淋巴细胞CD4^(+)CD25^(+)CD127^(low)Treg细胞的阳性率,以及检测BTLA/HVEM在肺结核患者外周血和淋巴细胞上的表达;利用蛋白芯片法检测结核抗体;通过影像检测结果判断肺结核进展程度;采用罗氏培养法培养结核分枝杆菌。结果结核组CD4^(+)CD25^(+)CD127^(low)Treg所占比例为(9.14±2.66)%,健康对照组CD4^(+)CD25^(+)CD127^(low)Treg所占比例为(6.39±1.73)%,相对于健康对照组,肺结核组患者外周血中CD4^(+)CD25^(+)CD127^(low)Treg比率明显增高;健康对照组CD4^(+)CD25^(+)CD127^(low)Treg上BTLA和HVEM的表达率高于肺结核组;BTLA、HVEM在肺结核组患者CD4^(+)CD25^(+)CD127^(low)Treg上的表达呈正相关;BTLA、HVEM在CD4^(+)CD25^(+)CD127^(low)Treg上的表达在痰涂阳性患者组中更低,而与其他临床特征无关。结论肺结核患者体内的CD4^(+)CD25^(+)CD127^(low)Treg增高,可能是抗结核免疫应答被抑制的原因,提示过度扩增导致数量异常增高的Treg是免疫应答不足和MTB逃逸的一个重要因素。负性共刺激信号BTLA/HVEM在结核患者体内下调提示其参与对CD4^(+)CD25^(+)CD127^(low)Treg的增殖的抑制作用。展开更多
A series of oxygen-doped RE_2CuO_4 (RE=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm) was synthesized using high-pressure/oxygen-doped technique. The structures and low temperature magnetic properties were investigated. The XRD ...A series of oxygen-doped RE_2CuO_4 (RE=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm) was synthesized using high-pressure/oxygen-doped technique. The structures and low temperature magnetic properties were investigated. The XRD patterns indicate that the structures of high oxygen pressure RE_2CuO_4 (only for RE=Sm, Eu) samples are pure T′ phase, but when RE= Gd, Tb, Dy, Ho, Er, Tm, the structures turn to disorder. The magnetic anomalies that occurred at T^30 K are observed in high oxygen pressure RE_2CuO_4. It is found that the transition temperatures of weak ferromagnetic anomalies are nearly independent of the rare-earth components. Thus, the O-doping plays an important role in anomalous magnetic properties of RE_2CuO_(4+δ). The magnetic anomalies in RE_2CuO_4 are considered to be due to ferromagnetic clusters formed in the Cu-O plane after the oxygen doping.展开更多
文摘目的探讨半乳凝素-10(galectin-10)在CD4+CD25+CD127low/-调节性T细胞(regulatory T cell,Treg)中的表达及其与Foxp3的相关性。方法通过流式细胞术分选健康人外周血和胃癌患者癌旁淋巴结中Treg细胞与CD4+CD25-CD127+T细胞,经微量抽提RNA后,用RT-PCR检测galectin-10和Foxp3的mRNA表达水平。结果galectin-10和Foxp3的mRNA显著表达于Treg细胞,几乎不表达于CD4+CD25-CD127+T细胞。健康人外周血和胃癌患者癌旁淋巴结中的结果一致。结论ga-lectin-10基因高表达于Treg细胞中,可以作为Treg细胞一项新的标志物。
文摘目的研究B、T淋巴细胞衰减因子(B and T lymphocyte attenuator,BTLA)及其配体疱疹病毒进入中介体(herpesvirus entry mediator,HVEM)在肺结核患者CD4^(+)CD25^(+)CD127^(low)调节性T细胞(CD4^(+)CD25^(+)CD127^(low)Treg)中的表达及其与患者临床特征的关系。方法选取肺结核患者30例(肺结核组)和20例健康体检者(健康对照组),通过流式细胞术检测2组外周血淋巴细胞CD4^(+)CD25^(+)CD127^(low)Treg细胞的阳性率,以及检测BTLA/HVEM在肺结核患者外周血和淋巴细胞上的表达;利用蛋白芯片法检测结核抗体;通过影像检测结果判断肺结核进展程度;采用罗氏培养法培养结核分枝杆菌。结果结核组CD4^(+)CD25^(+)CD127^(low)Treg所占比例为(9.14±2.66)%,健康对照组CD4^(+)CD25^(+)CD127^(low)Treg所占比例为(6.39±1.73)%,相对于健康对照组,肺结核组患者外周血中CD4^(+)CD25^(+)CD127^(low)Treg比率明显增高;健康对照组CD4^(+)CD25^(+)CD127^(low)Treg上BTLA和HVEM的表达率高于肺结核组;BTLA、HVEM在肺结核组患者CD4^(+)CD25^(+)CD127^(low)Treg上的表达呈正相关;BTLA、HVEM在CD4^(+)CD25^(+)CD127^(low)Treg上的表达在痰涂阳性患者组中更低,而与其他临床特征无关。结论肺结核患者体内的CD4^(+)CD25^(+)CD127^(low)Treg增高,可能是抗结核免疫应答被抑制的原因,提示过度扩增导致数量异常增高的Treg是免疫应答不足和MTB逃逸的一个重要因素。负性共刺激信号BTLA/HVEM在结核患者体内下调提示其参与对CD4^(+)CD25^(+)CD127^(low)Treg的增殖的抑制作用。
文摘A series of oxygen-doped RE_2CuO_4 (RE=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm) was synthesized using high-pressure/oxygen-doped technique. The structures and low temperature magnetic properties were investigated. The XRD patterns indicate that the structures of high oxygen pressure RE_2CuO_4 (only for RE=Sm, Eu) samples are pure T′ phase, but when RE= Gd, Tb, Dy, Ho, Er, Tm, the structures turn to disorder. The magnetic anomalies that occurred at T^30 K are observed in high oxygen pressure RE_2CuO_4. It is found that the transition temperatures of weak ferromagnetic anomalies are nearly independent of the rare-earth components. Thus, the O-doping plays an important role in anomalous magnetic properties of RE_2CuO_(4+δ). The magnetic anomalies in RE_2CuO_4 are considered to be due to ferromagnetic clusters formed in the Cu-O plane after the oxygen doping.
