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MedRxiv:SARS病毒抗体在体内存在可超过12年!

2020-02-16 xujing 中国循环杂志

近日,广州中山大学公共卫生学院健康中心学者采用前瞻性队列研究方法对广州市2002-2003年SARS爆发期间34名感染SARS-CoV的医护人员进行了13年随访,发现抗SARS-CoV的IgG抗体可持续存在12年以上。

在病毒或细菌等病原感染人体后,人体的免疫系统就会产生相应的物质来抵抗这些病原,这就是我们大家熟悉的抗体。抗体可以和病原结合,从而让其无法感染人体正常细胞。
 
近日,广州中山大学公共卫生学院健康中心学者采用前瞻性队列研究方法对广州市2002-2003年SARS爆发期间34名感染SARS-CoV的医护人员进行了13年随访,发现抗SARS-CoV的IgG抗体可持续存在12年以上。
 
研究者称,还不清楚持续存在的IgG抗体是否具有中和病毒的活性以及是否能针对SARS-CoV和其他类似冠状病毒提供完全保护作用,但基于以往的研究,预测IgG抗体的存在至少可以提供部分保护,防止冠状病毒感染。
 
研究者于2003-2015年对34例SARS-CoV感染者每年采集血清样本,并在2015年纳入40名非感染医护人员,采集其血清样本。
 
研究者以SARS冠状病毒全病毒和重组核衣壳蛋白为诊断抗原,用ELISA法检测血清IgG抗体。
 
研究发现,感染SARS-CoV者体内的抗SARS-CoV-IgG抗体可持续存在12年以上。
 
数据显示,IgG滴度在2004年达到峰值,从2004-2006年迅速下降,然后继续以较慢的速度下降。
 
直到2015年,SARS-CoV感染医护人员的IgG滴度仍处于高于无感染者。
 
研究还发现,感染SARS-CoV时,接受皮质类固醇如泼尼松和甲基泼尼松龙治疗的患者的IgG滴度低于未接受皮质类固醇治疗的患者。
 
但2003年后,两类患者无差异,提示皮质类固醇可能抑制早期SARS-CoV-IgG抗体的产生。
 
原始出处:
 Xiaoqin Guo, et al. Long-Term Persistence of IgG Antibodies in SARS-CoV Infected Healthcare Workers. medRxiv,doi:10.1101/2020. 02.12. 20021386.

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    2020-09-29 neurowu
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    2020-02-18 小刀医生
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