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Nature Immunology 2, 361–367 (1 April 2001) | doi:10.1038/86373

Dendritic cells express tight junction proteins and penetrate gut epithelial monolayers to sample bacteria

Maria Rescigno , Matteo Urbano , Barbara Valzasina , Maura Francolini , Gianluca Rotta , Roberto Bonasio , Francesca Granucci , Jean-Pierre Kraehenbuhl & Paola Ricciardi-Castagnoli