Life science has a need for detection methods that are label-free and real-time. In this paper, we have selected staphylococcal protein A （SPA） and swine immunoglobulin G （IgG）, and monitor the bindings between SP...Life science has a need for detection methods that are label-free and real-time. In this paper, we have selected staphylococcal protein A （SPA） and swine immunoglobulin G （IgG）, and monitor the bindings between SPA and swine IgG with different concentrations, as well as the dissociations of SPA-swine IgG complex in different pH values of phosphate buffer by oblique-incidence reflectivity difference （OIRD） in a label-free and real-time fashion. We obtain the ON and OFF reaction dynamic curves corresponding to the bindings and dissociations of SPA and swine IgG. Through our analysis of the experimental results, we have been able to obtain the damping coefficients and the dissociation time of SPA and swine IgG for different pH values of the phosphate buffer. The results prove that the OIRD technique is a competing method for monitoring the dynamic processes of biomolecule interaction and achieving the quantitative information of reaction kinetics.展开更多
目的探讨尿IgG/尿肌酐(UGCR)、24 h尿蛋白定量(24 h UP)、尿蛋白定量/尿肌酐(UPCR)在预测IgA血管炎肾炎(IgAVN)患儿肾脏病理进展中的价值。方法选取2018年1月—2022年10月收治的IgAVN患儿234例,均采集24 h尿液标本检测24 h UP。根据肾...目的探讨尿IgG/尿肌酐(UGCR)、24 h尿蛋白定量(24 h UP)、尿蛋白定量/尿肌酐(UPCR)在预测IgA血管炎肾炎(IgAVN)患儿肾脏病理进展中的价值。方法选取2018年1月—2022年10月收治的IgAVN患儿234例,均采集24 h尿液标本检测24 h UP。根据肾小球损伤程度不同将IgAVN患儿分为Ⅱ级47例、Ⅲ级175例、Ⅳ级12例,分析UGCR、24 h UP、UPCR与肾脏病理分级的相关性,通过受试者工作特征曲线分析上述指标预测肾脏IgAVN病理分级进展为Ⅲ级及以上的价值。结果肾脏病理分级Ⅲ级、Ⅳ级患儿UGCR、24 h UP、UPCR水平高于Ⅱ级患儿(P<0.01)。UGCR、24 h UP、UPCR与病理分级呈正相关,但相关性较弱(r=0.500、0.451、0.356,P<0.01)。UGCR、24 h UP和UPCR对IgAVN患儿肾脏病理分级进展为Ⅲ级及以上均具有预测价值,且三者联合检测预测价值更高(曲线下面积>0.9,P<0.01)。结论UGCR联合24 h UP、UPCR对IgAVN肾脏病理分级进展为Ⅲ级及以上的预测价值更高。展开更多
The rapid development of surface sensitive biosensor technologies requires optimum control of surface modification to provide reliable and reproducible results. With the aim to assemble a quartz crystal microbalance (...The rapid development of surface sensitive biosensor technologies requires optimum control of surface modification to provide reliable and reproducible results. With the aim to assemble a quartz crystal microbalance (QCM)-based protein biosensor, we focus our attention on sulfide receptor and its integration with the surface of the electrode. Here, we present different surface modification processing time to allow sulfide molecules to be immobilized to gold coated sensor for QCM sensing. The optimum surface modification processing time is also obtained by bovine serum albumin (BSA) binding measurement.展开更多
Objective: To explore the value of IgM and IgG contents for the diagnosis and judgment of mycoplasma pneumonia in children. Methods: 560 children with mycoplasma pneumonia who received inpatient treatment in our hospi...Objective: To explore the value of IgM and IgG contents for the diagnosis and judgment of mycoplasma pneumonia in children. Methods: 560 children with mycoplasma pneumonia who received inpatient treatment in our hospital between October 2016 and October 2017 were selected as mycoplasma pneumonia group, and 200 healthy children who received vaccination in our hospital during the same period were selected as normal control group. The differences in peripheral blood IgM and IgG contents as well as serum inflammatory factor and pulmonary surfactant protein contents were compared between the two groups, and Pearson test was used to evaluate the inner link of peripheral blood IgM and IgG contents with inflammatory factors and pulmonary surfactant proteins in children with mycoplasma pneumonia. Results: Peripheral blood IgM and IgG contents of mycoplasma pneumonia group were higher than those of normal control group;serum inflammatory factors MCP-4, IL-5, IL-13, IL-17, IL-18 and IL-23 contents were higher than those of normal control group;serum pulmonary surfactant proteins SP-A, SP-B, SP-C and SP-D contents were higher than those of normal control group. Correlation analysis showed that peripheral blood IgM and IgG contents in children with mycoplasma pneumonia were positively correlated with the contents of inflammatory factors and pulmonary surfactant proteins. Conclusion: Peripheral blood IgM and IgG contents are abnormally high in children with mycoplasma pneumonia, and they are closely related to the inflammatory response and lung injury degree.展开更多
基金Supported by the Key Research Program of Chinese Academy of Sciences
文摘Life science has a need for detection methods that are label-free and real-time. In this paper, we have selected staphylococcal protein A （SPA） and swine immunoglobulin G （IgG）, and monitor the bindings between SPA and swine IgG with different concentrations, as well as the dissociations of SPA-swine IgG complex in different pH values of phosphate buffer by oblique-incidence reflectivity difference （OIRD） in a label-free and real-time fashion. We obtain the ON and OFF reaction dynamic curves corresponding to the bindings and dissociations of SPA and swine IgG. Through our analysis of the experimental results, we have been able to obtain the damping coefficients and the dissociation time of SPA and swine IgG for different pH values of the phosphate buffer. The results prove that the OIRD technique is a competing method for monitoring the dynamic processes of biomolecule interaction and achieving the quantitative information of reaction kinetics.
文摘目的探讨尿IgG/尿肌酐(UGCR)、24 h尿蛋白定量(24 h UP)、尿蛋白定量/尿肌酐(UPCR)在预测IgA血管炎肾炎(IgAVN)患儿肾脏病理进展中的价值。方法选取2018年1月—2022年10月收治的IgAVN患儿234例,均采集24 h尿液标本检测24 h UP。根据肾小球损伤程度不同将IgAVN患儿分为Ⅱ级47例、Ⅲ级175例、Ⅳ级12例,分析UGCR、24 h UP、UPCR与肾脏病理分级的相关性,通过受试者工作特征曲线分析上述指标预测肾脏IgAVN病理分级进展为Ⅲ级及以上的价值。结果肾脏病理分级Ⅲ级、Ⅳ级患儿UGCR、24 h UP、UPCR水平高于Ⅱ级患儿(P<0.01)。UGCR、24 h UP、UPCR与病理分级呈正相关,但相关性较弱(r=0.500、0.451、0.356,P<0.01)。UGCR、24 h UP和UPCR对IgAVN患儿肾脏病理分级进展为Ⅲ级及以上均具有预测价值,且三者联合检测预测价值更高(曲线下面积>0.9,P<0.01)。结论UGCR联合24 h UP、UPCR对IgAVN肾脏病理分级进展为Ⅲ级及以上的预测价值更高。
文摘The rapid development of surface sensitive biosensor technologies requires optimum control of surface modification to provide reliable and reproducible results. With the aim to assemble a quartz crystal microbalance (QCM)-based protein biosensor, we focus our attention on sulfide receptor and its integration with the surface of the electrode. Here, we present different surface modification processing time to allow sulfide molecules to be immobilized to gold coated sensor for QCM sensing. The optimum surface modification processing time is also obtained by bovine serum albumin (BSA) binding measurement.
文摘Objective: To explore the value of IgM and IgG contents for the diagnosis and judgment of mycoplasma pneumonia in children. Methods: 560 children with mycoplasma pneumonia who received inpatient treatment in our hospital between October 2016 and October 2017 were selected as mycoplasma pneumonia group, and 200 healthy children who received vaccination in our hospital during the same period were selected as normal control group. The differences in peripheral blood IgM and IgG contents as well as serum inflammatory factor and pulmonary surfactant protein contents were compared between the two groups, and Pearson test was used to evaluate the inner link of peripheral blood IgM and IgG contents with inflammatory factors and pulmonary surfactant proteins in children with mycoplasma pneumonia. Results: Peripheral blood IgM and IgG contents of mycoplasma pneumonia group were higher than those of normal control group;serum inflammatory factors MCP-4, IL-5, IL-13, IL-17, IL-18 and IL-23 contents were higher than those of normal control group;serum pulmonary surfactant proteins SP-A, SP-B, SP-C and SP-D contents were higher than those of normal control group. Correlation analysis showed that peripheral blood IgM and IgG contents in children with mycoplasma pneumonia were positively correlated with the contents of inflammatory factors and pulmonary surfactant proteins. Conclusion: Peripheral blood IgM and IgG contents are abnormally high in children with mycoplasma pneumonia, and they are closely related to the inflammatory response and lung injury degree.
