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CD1b-autoreactive t cells contribute to hyperlipidemia-induced skin inflammation in mice
- Source :
- Journal of Clinical Investigation. June, 2017, Vol. 127 Issue 6, p2339, 14 p.
- Publication Year :
- 2017
-
Abstract
- A large proportion of human T cells are autoreactlve to group 1 CD1 proteins, which Include CD1a, CD1b, and CD1c. However, the physiological role of the CD1 proteins remains poorly defined. Here, we have generated a double-transgenic mouse model that expresses human CD1b and CD1c molecules (hCD1Tg) as well as a CD1b -autoreactive TCR (HJ1Tg) in the ApoE-deficient background (hCD1Tg HJ1Tg [Apoe.sup.-/-] mice) to determine the role of CD1 -autoreactive T cells in hyperlipidemia-associated inflammatory diseases. We found that hCD1Tg HJ1Tg [Apoe.sup.-/-] mice spontaneously developed psoriasiform skin inflammation characterized by T cell and neutrophil infiltration and a Th17-biased cytokine response. Anti-IL-17A treatment ameliorated skin inflammation in vivo. Additionally, phospholipids and cholesterol preferentially accumulated in diseased skin and these autoantigens directly activated CD1b-autoreactive HJ1 T cells. Furthermore, hyperlipidemic serum enhanced IL-6 secretion by CD1b * DCs and increased IL-17A production by HJ1 T cells. In psoriatic patients, the frequency of CD1b-autoreactive T cells was increased compared with that in healthy controls. Thus, this study has demonstrated the pathogenic role of CD1b-autoreactive T cells under hyperlipidemic conditions in a mouse model of spontaneous skin inflammation. As a large proportion of psoriatic patients are dyslipidemic, this finding is of clinical significance and indicates that self-lipid-reactive T cells might serve as a possible link between hyperlipidemia and psoriasis.<br />Introduction Hyperlipidemia is a condition characterized by elevated plasma lipid levels. LDL and triglycerides contribute to human disease in many organs. Approximately one-third of Americans show signs of hyperlipidemia or [...]
Details
- Language :
- English
- ISSN :
- 00219738
- Volume :
- 127
- Issue :
- 6
- Database :
- Gale General OneFile
- Journal :
- Journal of Clinical Investigation
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.498199752
- Full Text :
- https://doi.org/10.1172/JCI92217