CD1a autoreactive T cells recognize natural skin oils that function as headless antigens

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CD1a autoreactive T cells recognize natural skin oils that function as headless antigens

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Title: CD1a autoreactive T cells recognize natural skin oils that function as headless antigens
Author: de Jong, Annemieke; Cheng, Tan-Yun; Huang, Shouxiong; Gras, Stephanie; Birkinshaw, Richard W.; Kasmar, Anne; van Rhijn, Ildiko; Peña-Cruz, Victor; Ruan, Daniel T.; Altman, John D.; Rossjohn, Jamie; Moody, D. Branch

Note: Order does not necessarily reflect citation order of authors.

Citation: de Jong, A., T. Cheng, S. Huang, S. Gras, R. W. Birkinshaw, A. Kasmar, I. van Rhijn, et al. 2014. “CD1a autoreactive T cells recognize natural skin oils that function as headless antigens.” Nature immunology 15 (2): 177-185. doi:10.1038/ni.2790. http://dx.doi.org/10.1038/ni.2790.
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Abstract: CD1a autoreactive T cells are common in human blood and skin, but the search for natural autoantigens has been confounded by background T cell responses to CD1 proteins and self lipids. After capturing CD1a-lipid complexes, we gently eluted ligands, while preserving unliganded CD1a for testing lipids from tissues. CD1a released hundreds of ligands of two types. Inhibitory ligands were ubiquitous membrane lipids with polar headgroups, whereas stimulatory compounds were apolar oils. CD1a autoantigens naturally accumulate in epidermis and sebum, where they were identified as squalene and skin waxes. T cell activation by skin oils suggests that headless mini-antigens nest within CD1a and displace non-antigenic resident lipids with large head groups. Oily autoantigens naturally coat the skin's surface, pointing to a new mechanism of barrier immunity.
Published Version: doi:10.1038/ni.2790
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3932764/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12785975
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