《MedRxiv,3月16日,Heat inactivation of serum interferes with the immunoanalysis of antibodies to SARS-CoV-2》

  • 来源专题:COVID-19科研动态监测
  • 编译者: zhangmin
  • 发布时间:2020-03-17
  • Heat inactivation of serum interferes with the immunoanalysis of antibodies to SARS-CoV-2

    Xiumei Hu, Taixue An, Bo Situ, Yuhai Hu, Zihao Ou, Qiang Li, Xiaojing He, Ye Zhang, Peifu Tian, Dehua Sun, Yongyu Rui, Qian Wang, Dan Ding, Lei Zheng

    doi: https://doi.org/10.1101/2020.03.12.20034231

    Abstract

    The detection of serum antibodies to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is emerging as a new tool for the coronavirus disease-2019 (COVID-19) diagnosis. Since many coronaviruses are sensitive to heat, heating inactivation of samples at 56 ℃ prior to testing is considered a possible method to reduce the risk of transmission, but the effect of heating on the measurement of SARS-CoV-2 antibodies is still unclear. By comparing the levels of SARS-CoV-2 antibodies before and after heat inactivation of serum at 56 ℃ for 30 minutes using a quantitative fluorescence immunochromatographic assay, we shown that heat inactivation significantly interferes with the levels of antibodies to SARS-CoV-2.

    *注,本文为预印本论文手稿,是未经同行评审的初步报告,其观点仅供科研同行交流,并不是结论性内容,请使用者谨慎使用.

  • 原文来源:https://www.medrxiv.org/content/10.1101/2020.03.12.20034231v1
相关报告
  • 《3月16日_血清热失活干扰SARS-CoV-2抗体的免疫分析》

    • 来源专题:COVID-19科研动态监测
    • 编译者:xuwenwhlib
    • 发布时间:2020-03-17
    • 3月16日_血清热失活干扰SARS-CoV-2抗体的免疫分析 1.时间:2020年3月16日 2.机构或团队:南方医科大学第一临床医学院南方医院、广东省湖北医疗救援队、武汉市汉口医院、南开大学 3.事件概要: 南方医科大学第一临床医学院南方医院等机构的科研人员在medRxiv预印版平台发表论文“Heat inactivation of serum interferes with the immunoanalysis of antibodies to SARS-CoV-2”,探讨了血清热失活对SARS-CoV-2抗体的免疫分析的干扰。 文章提出,针对SARS-CoV-2的血清抗体的检测正在作为诊断新型冠状病毒肺炎的新工具而兴起。由于许多冠状病毒对热敏感,因此在测试前将样品在56℃加热灭活被认为是降低传播风险的一种可能方法,但是加热对SARS-CoV-2抗体测试的影响仍不清楚。通过定量荧光免疫色谱法比较56℃下加热灭活血清30分钟前后SARS-CoV-2抗体的水平,研究人员发现热灭活显著干扰SARS-CoV-2抗体的水平。来自COVID-19患者的所有34个血清样品(100%)的IgM水平平均降低了53.56%。34个样品中的22个(64.71%)的IgG水平比平均水平降低了49.54%。在非COVID-19疾病组(n = 9)中也可以观察到类似的变化。文章指出,加热后,检测到的IgM水平中有44.12%下降到临界值以下,这表明热失活会导致这些样品的假阴性结果。结果表明,血清在56℃热失活30分钟会干扰SARS-CoV-2抗体的免疫分析,科研人员不建议在免疫分析之前进行热灭活,如果样品通过加热进行了预灭活,则应考虑出现假阴性结果的可能性。 4.附件: 原文链接:https://www.medrxiv.org/content/10.1101/2020.03.12.20034231v1
  • 《bioRxiv,4月3日,SARS-CoV-2 neutralizing serum antibodies in cats: a serological investigation》

    • 来源专题:COVID-19科研动态监测
    • 编译者:xuwenwhlib
    • 发布时间:2020-04-05
    • SARS-CoV-2 neutralizing serum antibodies in cats: a serological investigation Qiang Zhang, Huajun Zhang, Kun Huang, Yong Yang, Xianfeng Hui, Jindong Gao, Xinglin He, Chengfei Li, Wenxiao Gong, Yufei Zhang, Cheng Peng, Xiaoxiao Gao, Huanchun Chen, Zhong Zou, Zhengli Shi, Meilin Jin doi: https://doi.org/10.1101/2020.04.01.021196 Abstract Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first reported in Wuhan, China, and rapidly spread worldwide. Previous studies suggested cat could be a potential susceptible animal of SARS-CoV-2. Here, we investigated the infection of SARS-CoV-2 in cats by detecting specific serum antibodies. A cohort of serum samples were collected from cats in Wuhan, including 102 sampled after COVID-19 outbreak, and 39 prior to the outbreak. 15 of 102 (14.7%) cat sera collected after the outbreak were positive for the receptor binding domain (RBD) of SARS-CoV-2 by indirect enzyme linked immunosorbent assay (ELISA). Among the positive samples, 11 had SARS-CoV-2 neutralizing antibodies with a titer ranging from 1/20 to 1/1080. No serological cross-reactivity was detected between the SARS-CoV-2 and type I or II feline infectious peritonitis virus (FIPV). Our data demonstrates that SARS-CoV-2 has infected cat population in Wuhan during the outbreak. *注,本文为预印本论文手稿,是未经同行评审的初步报告,其观点仅供科研同行交流,并不是结论性内容,请使用者谨慎使用.