MUC1 in human milk blocks transmission of human immunodeficiency virus from dendritic cells to T cells

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Updated: Jun 23, 2026

Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets
08:12

Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets

Published on: September 6, 2019

Eirikur Saeland1, Marein A W P de Jong, Alexey A Nabatov

  • 1Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands. e.saeland@vumc.nl

Molecular Immunology
|May 2, 2009
PubMed

Mother-to-child transmission of human immunodeficiency virus-1 (HIV-1) occurs frequently via breast-feeding. HIV-1 targets DC-SIGN+ dendritic cells (DCs) in mucosal areas that allow efficient transmission of the virus to T cells. Here, we demonstrate that the epithelial mucin MUC1, abundant in milk, efficiently bound to DC-SIGN on DC. The O-linked glycans within the mucin domain contained Lewis X structures, that were specifically recognized by the receptor. Interestingly, MUC1 prevented DC-SIGN-mediated transmission of HIV-1 from DCs to CD4+ T cells. We hypothesize that repetitive units of Lewis X, within the mucin domain, play an important role in inhibiting transmission of HIV-1 from mother to child.

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