Twelve-month specific IgG response to SARS-CoV-2 receptor-binding domain among COVID-19 convalescent plasma donors in Wuhan

Li, C.; Yu, D.; Wu, X.; Liang, H.; Zhou, Z.; Xie, Y.; Li, T.; Wu, J.; Lu, F.; Feng, L.; Mao, M.; Lin, L.; Guo, H.; Yue, S.; Wang, F.; Peng, Y.; Hu, Y.; Wang, Z.; Yu, J.; Zhang, Y.; Lu, J.; Ning, H.; Yang, H.; Fu, D.; He, Y.; Zhou, D.; Du, T.; Duan, K.; Dong, D.; Deng, K.; Zou, X.; Zhou, R.; Gao, Y.; Zhang, X.; Yang, X.

doi:10.1101/2021.04.05.437224

bioRxiv · 10.1101/2021.04.05.437224

Twelve-month specific IgG response to SARS-CoV-2 receptor-binding domain among COVID-19 convalescent plasma donors in Wuhan

Li, C.·Yu, D.·Wu, X.·Liang, H.·Zhou, Z.·Xie, Y.·Li, T.·Wu, J.·Lu, F.·Feng, L.·Mao, M.·Lin, L.·Guo, H.·Yue, S.·Wang, F.·Peng, Y.·Hu, Y.·Wang, Z.·Yu, J.·Zhang, Y.·Lu, J.·Ning, H.·Yang, H.·Fu, D.·He, Y.·Zhou, D.·Du, T.·Duan, K.·Dong, D.·Deng, K.·Zou, X.·Zhou, R.·Gao, Y.·Zhang, X.·Yang, X.

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Abstract

To investigate the duration of humoral immune response in convalescent coronavirus disease 2019 (COVID-19) patients, we conduct a 12-month longitudinal study through collecting a total of 1,782 plasma samples from 869 convalescent plasma donors in Wuhan, China and test specific antibody responses. The results show that positive rate of IgG antibody against receptor-binding domain of spike protein (RBD-IgG) to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the COVID-19 convalescent plasma donors exceeded 70% for 12 months post diagnosis. The level of RBD-IgG decreases with time, with the titer stabilizing at 64.3% of the initial level by the 9th month. Moreover, male plasma donors produce more RBD-IgG than female, and age of the patients positively correlates with the RBD-IgG titer. A strong positive correlation between RBD-IgG and neutralizing antibody titers is also identified. These results facilitate our understanding of SARS-CoV-2-induced immune memory to promote vaccine and therapy development.

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Li, C., Yu, D., Wu, X., Liang, H., Zhou, Z., Xie, Y., Li, T., Wu, J., Lu, F., Feng, L., Mao, M., Lin, L., Guo, H., Yue, S., Wang, F., Peng, Y., Hu, Y., Wang, Z., Yu, J., Zhang, Y., Lu, J., Ning, H., Yang, H., Fu, D., He, Y., Zhou, D., Du, T., Duan, K., Dong, D., Deng, K., Zou, X., Zhou, R., Gao, Y., Zhang, X., Yang, X.. 2021-04-05. Twelve-month specific IgG response to SARS-CoV-2 receptor-binding domain among COVID-19 convalescent plasma donors in Wuhan. https://doi.org/10.1101/2021.04.05.437224

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