期刊
ISCIENCE
卷 23, 期 11, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.isci.2020.101735
关键词
-
资金
- NIAID Centers of Excellence for Influenza Research and Surveillance (CEIRS) [HHSN272201400008C]
- Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai
The SARS-CoV-2 immune response in human milk has not yet been examined, although protecting infants and young children fromCOVID-19 is critical for limiting community transmission and preventing serious illness and death. Here, milk samples from eight COVID-19-recovered and seven COVID-19-suspected donors were tested for antibody (Ab) binding to the SARS-CoV-2 Spike protein. All samples exhibited significant specific IgA reactivity to the full Spike, whereas 80% exhibited significant IgA and secretory (s)Ab binding to the Receptor-Binding Domain (RBD). Additionally, 67% samples exhibited IgG and/or IgM binding to RBD. IgA and sAb titers were highly correlated, indicating most IgA to be sIgA. Overall, these data indicate that a robust sIgA-dominant SARS-CoV-2 Ab response in human milk after infection should be expected in a significant majority of individuals. Further research is highly warranted to determine Ab functionality and the potential for exploiting extracted milk sIgA for therapeutic use.
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