目的了解北京市通州区2021―2022年新报告Ⅰ型人类免疫缺陷病毒(human immunodeficiency virus type 1,HIV-1)感染者新发感染状况及人群分布特征。方法采用限制性抗原亲和力法,对通州区2021—2022年艾滋病确证实验室经免疫印迹法确证为H...目的了解北京市通州区2021―2022年新报告Ⅰ型人类免疫缺陷病毒(human immunodeficiency virus type 1,HIV-1)感染者新发感染状况及人群分布特征。方法采用限制性抗原亲和力法,对通州区2021—2022年艾滋病确证实验室经免疫印迹法确证为HIV-1抗体阳性的样本进行新发感染检测。采用χ^(2)检验分析2021―2022年通州区新报告HIV-1感染者新发感染人口学特征,采用二元logistic回归分析评价免疫印迹带型与化学发光COI(cut off index)值在预测HIV-1新发感染中的价值。结果北京市通州区2021―2022年新报告HIV-1感染者308例,新发感染127例,新发感染比例为41.23%。308例通州区新报告HIV-1感染者中,<30岁(新发感染比例为50.89%)、未婚/离异/丧偶(新发感染比例为44.58%)、大专及以上(新发感染比例为46.20%)、无性病史者(新发感染比例为44.75%)的新发感染比例较高,差异有统计学意义(χ^(2)值分别为7.414、5.563、6.057、3.865,P均<0.05)。不同性别、传播途径、户籍新报告HIV-1病例新发感染比例差异无统计学意义。免疫印迹带型中,p31条带缺失[记作p31(-)](OR=4.361,95%CI:1.529~12.439)、gp41条带缺失[记作gp41(-)](OR=14.542,95%CI:4.285~49.359)易被判定为新发感染,化学发光检测COI值<150的样本被判定为新发感染的可能性是COI值≥150样本的4.072倍。结论2021―2022年通州区新报告HIV-1感染者的新发感染比例均处于高位水平。进一步加强宣传干预措施对区域性疫情防控有重要意义。免疫印迹带型p31(-)、gp41(-),化学发光检测COI值<150在预测HIV-1新发感染中有指示作用。展开更多
Objective: With the development of peptide-based cancer specific immunotherapy, the prediction of CTL epitopes from insulin-like growth factor-binding protein 7 (IGFBP7) is very important for some research about tu...Objective: With the development of peptide-based cancer specific immunotherapy, the prediction of CTL epitopes from insulin-like growth factor-binding protein 7 (IGFBP7) is very important for some research about tumor metastasis. Because HLA-A2.1-expressing individuals cover 〉50% in the population of China, we aimed at identifying IGFBPT-encoded peptide presented by HLA-A2.1. Methods: In our study, a HLA-A2.1 restricted CTL epitope was identified by using the following two-step procedure: (a) computer-based epitope prediction from the amino acid sequence of IGFBP7 antigen; (b) Validation with epitope molecular modeling. Results: We obtained four epitopes with high immunogenicity scores by all of the three algorithms, i.e., BIMAS, SYFPEITH1 and IMTECH. Each of the four candidates satisfied the criteria of the HLA-A2.1- restricted CTL epitopes in molecular modeling analysis. Conclusion: The combination of BIMAS, SYFPEITHI and IMTECH method can improve the prediction efficiency and accuracy. Due to this research herein, this four epitopes have potential value for further studied, also have potential application in peptide-mediated immunotherapy. These epitopes may be useful in the design of therapeutic peptide vaccine for lung carcinoma and as immunotherapeutic strategies against lung carcinoma after identified by immunology experiment.展开更多
目的限制性抗原亲和力方法(简称LAg)与BED捕获酶联免疫试验(简称BED)在四川省男男性行为者(Men who have sex with men,简称MSM)人群中新发感染检测结果的比较,为该方法在四川省的推广应用和可能存在的问题提供参考。方法收集四川省2015...目的限制性抗原亲和力方法(简称LAg)与BED捕获酶联免疫试验(简称BED)在四川省男男性行为者(Men who have sex with men,简称MSM)人群中新发感染检测结果的比较,为该方法在四川省的推广应用和可能存在的问题提供参考。方法收集四川省2015年10个MSM哨点的新发感染检测样本274份,分别用LAg和BED进行检测,2检验分析两种方法新发感染结果判定的一致性,根据Mc Dougal法的中点公式分别计算并比较2种方法的HIV-1新发感染率。结果 274份纳入新发感染检测的样本,LAg判定为新发感染81人(29.56%,81/274),BED判定为新发感染111(40.51%,111/274)。2种方法判定结果的调整一致率为86.72%,2检验分析发现2种方法判定结果一致性差异有统计学意义(P<0.05),BED检出率较高。LAg的HIV-1新发感染率为7.14%(95%CI:5.58%-8.69%),BED的HIV-1新发感染率为7.54%(95%CI:6.13%-8.94%)。结论对于四川省2015年274例MSM哨点样本,LAg判定新发感染比例低于BED,用Mc Dougal法的中点公式计算2种方法的HIV-1新发感染率结果基本一致。HIV-1新发感染率的观察不易采信绝对数值,应以观察变化趋势为宜。展开更多
文摘目的了解北京市通州区2021―2022年新报告Ⅰ型人类免疫缺陷病毒(human immunodeficiency virus type 1,HIV-1)感染者新发感染状况及人群分布特征。方法采用限制性抗原亲和力法,对通州区2021—2022年艾滋病确证实验室经免疫印迹法确证为HIV-1抗体阳性的样本进行新发感染检测。采用χ^(2)检验分析2021―2022年通州区新报告HIV-1感染者新发感染人口学特征,采用二元logistic回归分析评价免疫印迹带型与化学发光COI(cut off index)值在预测HIV-1新发感染中的价值。结果北京市通州区2021―2022年新报告HIV-1感染者308例,新发感染127例,新发感染比例为41.23%。308例通州区新报告HIV-1感染者中,<30岁(新发感染比例为50.89%)、未婚/离异/丧偶(新发感染比例为44.58%)、大专及以上(新发感染比例为46.20%)、无性病史者(新发感染比例为44.75%)的新发感染比例较高,差异有统计学意义(χ^(2)值分别为7.414、5.563、6.057、3.865,P均<0.05)。不同性别、传播途径、户籍新报告HIV-1病例新发感染比例差异无统计学意义。免疫印迹带型中,p31条带缺失[记作p31(-)](OR=4.361,95%CI:1.529~12.439)、gp41条带缺失[记作gp41(-)](OR=14.542,95%CI:4.285~49.359)易被判定为新发感染,化学发光检测COI值<150的样本被判定为新发感染的可能性是COI值≥150样本的4.072倍。结论2021―2022年通州区新报告HIV-1感染者的新发感染比例均处于高位水平。进一步加强宣传干预措施对区域性疫情防控有重要意义。免疫印迹带型p31(-)、gp41(-),化学发光检测COI值<150在预测HIV-1新发感染中有指示作用。
基金Supported by the Special fund of the National High Technology Research and Development Program of China (863 Program,2007AA02Z129)the National Natural Science Foundation of China (30672076 and 30800506)
文摘Objective: With the development of peptide-based cancer specific immunotherapy, the prediction of CTL epitopes from insulin-like growth factor-binding protein 7 (IGFBP7) is very important for some research about tumor metastasis. Because HLA-A2.1-expressing individuals cover 〉50% in the population of China, we aimed at identifying IGFBPT-encoded peptide presented by HLA-A2.1. Methods: In our study, a HLA-A2.1 restricted CTL epitope was identified by using the following two-step procedure: (a) computer-based epitope prediction from the amino acid sequence of IGFBP7 antigen; (b) Validation with epitope molecular modeling. Results: We obtained four epitopes with high immunogenicity scores by all of the three algorithms, i.e., BIMAS, SYFPEITH1 and IMTECH. Each of the four candidates satisfied the criteria of the HLA-A2.1- restricted CTL epitopes in molecular modeling analysis. Conclusion: The combination of BIMAS, SYFPEITHI and IMTECH method can improve the prediction efficiency and accuracy. Due to this research herein, this four epitopes have potential value for further studied, also have potential application in peptide-mediated immunotherapy. These epitopes may be useful in the design of therapeutic peptide vaccine for lung carcinoma and as immunotherapeutic strategies against lung carcinoma after identified by immunology experiment.
文摘目的限制性抗原亲和力方法(简称LAg)与BED捕获酶联免疫试验(简称BED)在四川省男男性行为者(Men who have sex with men,简称MSM)人群中新发感染检测结果的比较,为该方法在四川省的推广应用和可能存在的问题提供参考。方法收集四川省2015年10个MSM哨点的新发感染检测样本274份,分别用LAg和BED进行检测,2检验分析两种方法新发感染结果判定的一致性,根据Mc Dougal法的中点公式分别计算并比较2种方法的HIV-1新发感染率。结果 274份纳入新发感染检测的样本,LAg判定为新发感染81人(29.56%,81/274),BED判定为新发感染111(40.51%,111/274)。2种方法判定结果的调整一致率为86.72%,2检验分析发现2种方法判定结果一致性差异有统计学意义(P<0.05),BED检出率较高。LAg的HIV-1新发感染率为7.14%(95%CI:5.58%-8.69%),BED的HIV-1新发感染率为7.54%(95%CI:6.13%-8.94%)。结论对于四川省2015年274例MSM哨点样本,LAg判定新发感染比例低于BED,用Mc Dougal法的中点公式计算2种方法的HIV-1新发感染率结果基本一致。HIV-1新发感染率的观察不易采信绝对数值,应以观察变化趋势为宜。