Bile retinoids imprint intestinal CD103(+) dendritic cells with the ability to generate gut-tropic T cells.

Summary, in English

Small intestinal lamina propria (SI-LP) CD103(+) dendritic cells (DCs) are imprinted with an ability to metabolize vitamin A (retinol), a property underlying their enhanced capacity to induce the gut-homing receptors CC chemokine receptor-9 and α4β7 on responding T cells. In this study, we demonstrate that imprinting of CD103(+) DCs is itself critically dependent on vitamin A and occurs locally within the small intestine (SI). The major vitamin A metabolite retinoic acid (RA) induced retinol-metabolizing activity in DCs both in vitro and in vivo, suggesting a direct role for RA in this process. Consistent with this, SI-LP CD103(+) DCs constitutively received RA signals in vivo at significantly higher levels than did colonic CD103(+) DCs. Remarkably, SI CD103(+) DCs remained imprinted in mice depleted of dietary but not of systemic retinol. We found that bile contained high levels of retinol, induced RA receptor-dependent retinol-metabolizing activity in bone marrow-derived DCs, and imprinted these cells with the ability to generate gut-tropic T cells. Taken together, these results suggest a novel and unexpected role for bile in SI-LP CD103(+) DC imprinting.Mucosal Immunology advance online publication 2 February 2011. doi:10.1038/mi.2010.91.

• Author: Elin Jaensson Gyllenbäck; Knut Kotarsky; Fernando Zapata; E K Persson; T E Gundersen; R Blomhoff; William Agace
• Department/s: Mucosal Immunology
• Publishing year: 2011
• Language: English
• Pages: 438-447
• Publication/Series: Mucosal Immunology
• Volume: 4
• Links: http://www.ncbi.nlm.nih.gov/pubmed/21289617?dopt=Abstract; http://dx.doi.org/10.1038/mi.2010.91
• Document type: Journal article
• Publisher: Nature Publishing Group
• Topic: Immunology in the medical area
• Status: Published
• Research group: Mucosal Immunology
• ISBN/ISSN/Other: ISSN: 1933-0219