目的探讨孕早期血清补体C3、C4水平与系统性红斑狼疮(SLE)孕妇不良妊娠结局的关系。方法在2019年1月至2023年11月进行了一项回顾性队列研究,纳入了来自西安交通大学第一附属医院妇产科的100例SLE孕妇作为研究对象。浊度免疫测定试验对...目的探讨孕早期血清补体C3、C4水平与系统性红斑狼疮(SLE)孕妇不良妊娠结局的关系。方法在2019年1月至2023年11月进行了一项回顾性队列研究,纳入了来自西安交通大学第一附属医院妇产科的100例SLE孕妇作为研究对象。浊度免疫测定试验对所有患者测定血清补体C3、C4水平。比较不良妊娠结局和良好妊娠结局患者血清补体C3、C4水平差异,并通过Logistic模型分析影响SLE孕妇妊娠结局的临床因素。结果共计有48例(48.0%)患者发生不良妊娠结局。在不良妊娠结局患者中血清补体C3和C4水平显著低于良好妊娠结局患者(P<0.001);这种降低趋势主要表现在发生早产和未发生早产以及小于胎龄儿(small for gestational age infant,SGA)和非SGA患者中。经多因素Logistic模型分析,血清补体C3水平降低、不使用AZA和子痫前期是影响SLE患者不良妊娠结局的独立危险因素(P<0.05)。经受试者操作特征(ROC)曲线分析,血清补体C3、C4预测不良妊娠结局的曲线下面积(AUC)为0.832、0.757(P<0.001)。以血清补体C3、C4的正常值下限75 mg/dL、9 mg/dL进行分组,组间间隔为10 mg/dL和1 mg/dL;随着血清补体C3、C4水平的下降,不良妊娠结局的发生率增加,尤其在以血清补体C3分组的患者中。Spearman相关性分析显示孕早期血清补体C3(r=–0.342,P<0.001)、C4(r=–0.387,P<0.001)水平与SLE疾病活动度评分呈显著负相关性。结论孕早期血清补体(尤其是补体C3)水平降低是影响SLE孕妇不良妊娠结局的重要危险因素,因此孕早期补体C3、C4水平降低的患者可能更容易发生不良妊娠结局,但是该结果需要在更大的患者群体中进一步证实。展开更多
A piezoelectric immunosensor has been developed for the detection of complement C4. Anti-C4 antibody was immobilized onto the gold electrodes of a 9 MHz AT-cut piezoelectric crystal. The coated crystal with the physic...A piezoelectric immunosensor has been developed for the detection of complement C4. Anti-C4 antibody was immobilized onto the gold electrodes of a 9 MHz AT-cut piezoelectric crystal. The coated crystal with the physical adsorption method to immobilize antibody showed the better results than the polyethyleneimine adhesion, glutaraldehyde cross-linking method with respect to sensitivity and reproducibility. The antibody-bound crystal with the physical adsorption method was successfully used for the detection of human complement C4 in the concentration range of 0.1—10 μg/mL for 40 min incubation time. The immunosensor system had good selectivity, and other materials in human Serum did not interfere the detection remarkably. The crystal could be regenerated nearly 15 times when the bound materials on the crystal surface were eluted by strong acid and strong alkali solutions and subsequently cleaned in a ultrasonic cleaner.展开更多
文摘目的探讨孕早期血清补体C3、C4水平与系统性红斑狼疮(SLE)孕妇不良妊娠结局的关系。方法在2019年1月至2023年11月进行了一项回顾性队列研究,纳入了来自西安交通大学第一附属医院妇产科的100例SLE孕妇作为研究对象。浊度免疫测定试验对所有患者测定血清补体C3、C4水平。比较不良妊娠结局和良好妊娠结局患者血清补体C3、C4水平差异,并通过Logistic模型分析影响SLE孕妇妊娠结局的临床因素。结果共计有48例(48.0%)患者发生不良妊娠结局。在不良妊娠结局患者中血清补体C3和C4水平显著低于良好妊娠结局患者(P<0.001);这种降低趋势主要表现在发生早产和未发生早产以及小于胎龄儿(small for gestational age infant,SGA)和非SGA患者中。经多因素Logistic模型分析,血清补体C3水平降低、不使用AZA和子痫前期是影响SLE患者不良妊娠结局的独立危险因素(P<0.05)。经受试者操作特征(ROC)曲线分析,血清补体C3、C4预测不良妊娠结局的曲线下面积(AUC)为0.832、0.757(P<0.001)。以血清补体C3、C4的正常值下限75 mg/dL、9 mg/dL进行分组,组间间隔为10 mg/dL和1 mg/dL;随着血清补体C3、C4水平的下降,不良妊娠结局的发生率增加,尤其在以血清补体C3分组的患者中。Spearman相关性分析显示孕早期血清补体C3(r=–0.342,P<0.001)、C4(r=–0.387,P<0.001)水平与SLE疾病活动度评分呈显著负相关性。结论孕早期血清补体(尤其是补体C3)水平降低是影响SLE孕妇不良妊娠结局的重要危险因素,因此孕早期补体C3、C4水平降低的患者可能更容易发生不良妊娠结局,但是该结果需要在更大的患者群体中进一步证实。
基金Project supported by the National Natural Science Foundation of China.
文摘A piezoelectric immunosensor has been developed for the detection of complement C4. Anti-C4 antibody was immobilized onto the gold electrodes of a 9 MHz AT-cut piezoelectric crystal. The coated crystal with the physical adsorption method to immobilize antibody showed the better results than the polyethyleneimine adhesion, glutaraldehyde cross-linking method with respect to sensitivity and reproducibility. The antibody-bound crystal with the physical adsorption method was successfully used for the detection of human complement C4 in the concentration range of 0.1—10 μg/mL for 40 min incubation time. The immunosensor system had good selectivity, and other materials in human Serum did not interfere the detection remarkably. The crystal could be regenerated nearly 15 times when the bound materials on the crystal surface were eluted by strong acid and strong alkali solutions and subsequently cleaned in a ultrasonic cleaner.
