目的检测乙肝肝硬化患者外周血中25-(OH)D3、Th17、CD4^+Treg细胞变化,为维生素D治疗乙肝肝硬化提供依据。方法选取乙肝肝硬化患者21例,正常对照者15例,采用电化学发光免疫测定法检测25-(OH)D3水平,采用流式细胞仪检测Th17细胞、CD4^+T...目的检测乙肝肝硬化患者外周血中25-(OH)D3、Th17、CD4^+Treg细胞变化,为维生素D治疗乙肝肝硬化提供依据。方法选取乙肝肝硬化患者21例,正常对照者15例,采用电化学发光免疫测定法检测25-(OH)D3水平,采用流式细胞仪检测Th17细胞、CD4^+Treg细胞水平,并计算Th17/Treg比率。结果健康对照组外周血25-(OH)D3为(31.87±5.97)ng/ml,乙肝肝硬化组25-(OH)D3明显降低,为(11.89±6.04)ng/ml,两者相比差异具有统计学意义(t=9.510,P=0.001)。与健康对照组相比,乙肝肝硬化组外周血Th17细胞百分比(0.913%±0.216%vs 2.498%±2.583%)增高,CD4^+Treg细胞百分比降低(3.964%±1.116%vs 2.333%±1.714%),Th17/Treg比率(1.199±0.973 vs 0.256±0.138)增高,差异均有统计学意义(P<0.05)。结论乙肝肝硬化患者外周血25-(OH)D3水平显著降低,Th17增高,CD4^+Treg降低,存在CD4^+Treg、Th17、Treg/Th17免疫平衡紊乱,增加外周血25-(OH)D3水平有可能调节乙肝肝硬化患者体内CD4^+Treg、Th17、Treg/Th17变化,改变其免疫状态。展开更多
The rapid recombination of photo-generated electron-hole pairs,insufficient active sites,and strong photocorrosion have considerably restricted the practical application of Cd S in photocatalytic fields.Herein,we desi...The rapid recombination of photo-generated electron-hole pairs,insufficient active sites,and strong photocorrosion have considerably restricted the practical application of Cd S in photocatalytic fields.Herein,we designed and constructed a 2D/2D/2D layered heterojunction photocatalyst with cascaded 2D coupling interfaces.Experiments using electron spin resonance spectroscopy,ultraviolet photoelectron spectroscopy,and in-situ irradiation X-ray photoelectron spectroscopy were conducted to confirm the 2D layered CdS/WO_(3) step-scheme(S-scheme)heterojunctions and CdS/MX ohmic junctions.Impressively,it was found that the strong interfacial electric fields in the S-scheme heterojunction photocatalysts could effectively promote spatially directional charge separation and transport between CdS and WO_(3) nanosheets.In addition,2D Ti_(3)C_(2) MXene nanosheets with a smaller work function and excellent metal conductivity when used as a co-catalyst could build ohmic junctions with Cd S nanosheets,thus providing a greater number of electron transfer pathways and hydrogen evolution sites.Results showed that the highest visible-light hydrogen evolution rate of the optimized MX-Cd S/WO_(3) layered multi-heterostructures could reach as high as 27.5 mmol/g/h,which was 11.0 times higher than that of pure CdS nanosheets.Notably,the apparent quantum efficiency reached 12.0% at 450 nm.It is hoped that this study offers a reliable approach for developing multifunctional photocatalysts by integrating S-scheme and ohmic-junction built-in electric fields and rationally designing a 2D/2D interface for efficient light-to-hydrogen fuel production.展开更多
文摘目的检测乙肝肝硬化患者外周血中25-(OH)D3、Th17、CD4^+Treg细胞变化,为维生素D治疗乙肝肝硬化提供依据。方法选取乙肝肝硬化患者21例,正常对照者15例,采用电化学发光免疫测定法检测25-(OH)D3水平,采用流式细胞仪检测Th17细胞、CD4^+Treg细胞水平,并计算Th17/Treg比率。结果健康对照组外周血25-(OH)D3为(31.87±5.97)ng/ml,乙肝肝硬化组25-(OH)D3明显降低,为(11.89±6.04)ng/ml,两者相比差异具有统计学意义(t=9.510,P=0.001)。与健康对照组相比,乙肝肝硬化组外周血Th17细胞百分比(0.913%±0.216%vs 2.498%±2.583%)增高,CD4^+Treg细胞百分比降低(3.964%±1.116%vs 2.333%±1.714%),Th17/Treg比率(1.199±0.973 vs 0.256±0.138)增高,差异均有统计学意义(P<0.05)。结论乙肝肝硬化患者外周血25-(OH)D3水平显著降低,Th17增高,CD4^+Treg降低,存在CD4^+Treg、Th17、Treg/Th17免疫平衡紊乱,增加外周血25-(OH)D3水平有可能调节乙肝肝硬化患者体内CD4^+Treg、Th17、Treg/Th17变化,改变其免疫状态。
文摘The rapid recombination of photo-generated electron-hole pairs,insufficient active sites,and strong photocorrosion have considerably restricted the practical application of Cd S in photocatalytic fields.Herein,we designed and constructed a 2D/2D/2D layered heterojunction photocatalyst with cascaded 2D coupling interfaces.Experiments using electron spin resonance spectroscopy,ultraviolet photoelectron spectroscopy,and in-situ irradiation X-ray photoelectron spectroscopy were conducted to confirm the 2D layered CdS/WO_(3) step-scheme(S-scheme)heterojunctions and CdS/MX ohmic junctions.Impressively,it was found that the strong interfacial electric fields in the S-scheme heterojunction photocatalysts could effectively promote spatially directional charge separation and transport between CdS and WO_(3) nanosheets.In addition,2D Ti_(3)C_(2) MXene nanosheets with a smaller work function and excellent metal conductivity when used as a co-catalyst could build ohmic junctions with Cd S nanosheets,thus providing a greater number of electron transfer pathways and hydrogen evolution sites.Results showed that the highest visible-light hydrogen evolution rate of the optimized MX-Cd S/WO_(3) layered multi-heterostructures could reach as high as 27.5 mmol/g/h,which was 11.0 times higher than that of pure CdS nanosheets.Notably,the apparent quantum efficiency reached 12.0% at 450 nm.It is hoped that this study offers a reliable approach for developing multifunctional photocatalysts by integrating S-scheme and ohmic-junction built-in electric fields and rationally designing a 2D/2D interface for efficient light-to-hydrogen fuel production.
