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11.
目的 构建小鼠galectin-9重组腺病毒pAd-gal-9,探讨galectin-9的真核表达定位以及galectin-9诱导T细胞凋亡与Tim-3表达的关系.方法 常规分子克隆方法 结合LR反应构建腺病毒重组质粒pAd/CMV/V5-DEST-gal-9,以Pac I线性化后,用脂质体2000体外转染293A细胞,8 d后反复冻融细胞3次收集含病毒上清,并以此上清感染293A细胞大量扩增病毒pAd-gal-9.CsCI密度梯度离心法纯化病毒,96孔板法梯度感染293A细胞测定病毒滴度,然后感染CHO细胞,用免疫组化、Western blot和流式细胞仪分析galectin-9的表达水平和定位;以新鲜培养的上清或固相化的细胞分别与外周淋巴结细胞进行培养,AnnexinV/PI法检测T细胞凋亡情况,对比凋亡细胞比例与Tim-3~+ T细胞的比例.结果 重组腺病毒构建及表达成功,免疫组化表明galectin-9在CHO胞质表达;Westernblot证实galectin-9表达;流式分析表明胞内染色组galectin-9平均荧光强度显著高于表面染色组,病毒感染CHO表面染色组与空白对照组galectin-9平均荧光强度无明显区别;新鲜培养的上清可以明显诱导T细胞发生凋亡,显著高于Tim-3~+ T细胞的比例.结论 重组腺病毒pAd-gal-9构建成功,体外感染pad-gal-9的CHO分泌galectin-9诱导T细胞凋亡可以不依赖Tim-3的表达. 相似文献
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用流式细胞仪分别检测不同功能状态下肾移植术后患者体内的CD8~ CD28~-NRP-1~ Ts细胞和CD8~ CD28~-Foxp3~ Ts细胞,通过比较两类细胞的阳性表达率初步探讨它们之间的表达关系和意义。选取正常健康人10例,移植肾功能稳定的长期存活者24例,慢性移植物肾病者20例,急性排斥者15例,取受试者外周静脉血,分离单个核细胞,利用流式细胞仪检测CD8~ CD28~-NRP-1~ Ts细胞和CD8~ CD28~-Foxp3~ Ts细胞在CD8~ CD28~-T细胞群中的比例。结果表明组间比较得出,CD8~ CD28~-NRP-1~ Ts细胞和CD8~ CD28~-Foxp3~ Ts细胞比例在四组之间均有统计学差异(P<0.05)。其中在长期存活组表达量最高,其CD8~ CD28~-NRP-1~ Ts细胞和CD8~ CD28~-Foxp3~ Ts的比例分别为16.15%±1.49%和11.90%±2.73%,其次为正常健康人(13.83%±2.38%、9.44%±2.03%),然后为慢性移植物肾病组(8.03%±2.67%、5.26%±0.65%),而急排组最低(3.34%±1.73%、2.36%±1.14%),并且四组间这两种细胞呈同一变化趋势且前者的变化幅度大于后者。组内比较显示,CD8~ CD28~-NRP-1~ Ts细胞比例均高于CD8~ CD28~-Foxp3~ Ts细胞(P<0.05)。CD8~ CD28 NRP-1~ Ts细胞可以从整体水平上反映肾移植术后患者的免疫状态,它比CD8~ CD28~-Foxp3~ Ts细胞更能全面的反映术后患者的预后情况。 相似文献
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To identify acute renal allograft rejection biomarkers in human serum, two-dimensional differential in-gel electrophoresis (2-D DIGE) and reversed phase high-performance liquid chromatography (RP-HPLC) followed by electrospray ionization mass spectrometry (ESI-MS) were used. Serum samples from renal allograft patients and normal volunteers were divided into three groups: acute rejec- tion (AR), stable renal function (SRF) and normal volunteer (N). Serum samples were firstly processed using Multiple Affinity Removal Column to selectively remove the highest abundance proteins. Differentially expressed proteins were analyzed using 2-D DIGE. These differential protein spots were excised, digested by trypsin, and identified by RP-HPLC-ESI/MS. Twenty-two differentially expressed proteins were identified in serum from AR group. These proteins included complement C9 precursor, apolipoprotein A-IV precursor, vitamin D-binding protein precursor, beta-2-glycoprotein 1 precursor, etc. Vitamin D-binding protein, one of these proteins, was confirmed by ELISA in the independent set of serum samples. In conclusion, the differentially expressed proteins as serum biomarker candidates may provide the basis of acute rejection noninvasive diagnosis. Confirmed vitamin D-binding protein may be one of serum biomarkers of acute rejection. Furthermore, it may provide great insights into understanding the mechanisms and potential treatment strategy of acute rejection. 相似文献
14.
目的 探讨neuropilin-1(NRPl)在外周血中CIM+ CD25+ T细胞上的表达以及意义.方法 收集肾移植术后长期存活、慢性移植物肾病和急性排斥患者以及健康成年人的外周血,分离外周血淋巴细胞,用流式细胞仪检测外周血淋巴细胞中CD4+ CD25+ T细胞上NRPl和Foxp3的阳性细胞的百分比.结果 各组CD4+ CD25+ T细胞NRPl的表达率差异有统计学意义(P<0.05);各组CD4+ CD25+ T细胞Foxp3的表达率差异亦有统计学意义(P<0.05).长期存活组CD4+ CD25+ T细胞上NRP1和Foxp3表达率分别为19.6%±3.84%、50.19 ±3.90%,显著高于对照及慢性移植物肾病和急性排斥组(P<0.05);急性排斥组的CD4+ CD25+ T细胞NRP1和Foxp3表达率最低4.64%±1.26%、17.24%±5.29%.各组CD4+ CD25+ T细胞NRP1表达变化趋势与Foxp3变化趋势相同.结论 NRP1在长期存活组的外周血淋巴细胞中CD4+ CD25+ T细胞的表达上调,在急性排斥组时表达下调,且其在各组的表达变化趋势与Foxp3的表达变化趋势是一致的,这就提示CD4+ CD25+ NRP1+ 细胞是一群调节性T细胞,即NRP1是CD4+ CD25+ Treg的一个重要的表面标志. 相似文献