Evidence for murine cutaneous immune surveillance localized to hair follicle epithelium (opens in new tab)

Epithelial expression of the gene encoding the anti-microbial peptide PGRP-S was previously found to be specifically associated with M cells in mucosal epithelium. However, recent studies have found PGRP-S expression by a variety of epithelia not providing direct M cell-like microparticle transcytosis into lymphoid tissues. Thus, in mouse epidermis we found that PGRP-S expression, revealed by a dsRed reporter, was specific to subsets of hair follicle epithelium, depending on the specific skin...