Proteomic analysis of human milk reveals nutritional and immune benefits in the colostrum from mothers with COVID-19

Author:

Guo Juanjuan,Tan Minjie,Zhu Jing,Tian Ye,Liu Huanyu,Luo Fan,Wang JianbinORCID,Huang YanyiORCID,Zhang Yuanzhen,Yang Yuexin,Wang Guanbo

Abstract

ABSTRACTThe range of benefits breastfeeding provides neonates and infants include nutrition, improved neonatal survival, and reduced morbidity from certain diseases. It also aids maternal health by speeding postpartum recovery. However, due to concern about the risk of SARS-CoV-2 transmission and the lack of evidence of breastmilk’s protective effects against the virus, whether mothers with COVID-19 should be encouraged to breastfeed is under debate. Here, we present the results of proteomic and glycoproteomic studies of breast milk (colostrum and mature milk) from mothers with confirmed COVID-19. All colostrum samples exhibited significantly upregulated immune-related proteins, especially whey proteins with antiviral properties against SARS-CoV-2, and increased glycosylation levels and heterogeneity at those proteins. Such adaptive differences in milk from COVID-19 mothers tend to fade in mature milk from the same mothers one month postpartum. These results suggest the immune benefits of colostrum from mothers with COVID-19 and provide molecular-level insights that aid breastmilk feeding decisions in cases of active infection.

Publisher

Cold Spring Harbor Laboratory

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