PMID- 28972093 OWN - NLM STAT- MEDLINE DCOM- 20171026 LR - 20180129 IS - 1550-6606 (Electronic) IS - 0022-1767 (Linking) VI - 199 IP - 9 DP - 2017 Nov 1 TI - The Cooperative Role of CD326(+) and CD11b(+) Dendritic Cell Subsets for a Hapten-Induced Th2 Differentiation. PG - 3137-3146 LID - 10.4049/jimmunol.1601262 [doi] AB - Dendritic cells (DCs) play a critical role in directing immune responses. Previous studies have identified a variety of DC subsets and elucidated their context-dependent functions that parallel those of effector Th cell subsets. However, little is known about the DC subsets responsible for differentiation of Th2 cells governing allergic contact dermatitis. In this study, we sought to determine the DC subset(s) that mediate Th2 priming in hapten-sensitized mice. We induced hapten-specific Th2 differentiation by sensitizing the mice with a single application of FITC dissolved in acetone:dibutyl phthalate, and traced the immune cells responsible for inducing the Th2 differentiation process at the primary stimulation, enabling us to track Th2 priming in vivo and to delete basophils and specific DC subsets. Our analysis revealed that IL-4 was produced in vivo as early as day 3 from CD4(+) T cells with a single application of FITC. Basophils, despite producing IL-4 1 d earlier than T cells, were found to be dispensable for Th2 differentiation. Instead, we demonstrated that CD326(+) dermal DCs and Langerhans cells were redundantly required for FITC-induced Th2 differentiation in vivo. Moreover, the cooperation of CD326(+) Langerhans cells and CD11b(+) DCs differentiated naive T cells into Th2 cells in vitro. Collectively, our findings highlight at least two DC subsets that play a critical role in polarizing naive CD4(+) T cells to Th2 cells and support a two-hit model for Th2 differentiation. CI - Copyright (c) 2017 by The American Association of Immunologists, Inc. FAU - Cho, Yuri AU - Cho Y AD - Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea. FAU - Kwon, Dohyeong AU - Kwon D AD - Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea. FAU - Kang, Suk-Jo AU - Kang SJ AD - Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea suk-jo.kang@kaist.ac.kr. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20171002 PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (CD11b Antigen) RN - 0 (Epithelial Cell Adhesion Molecule) RN - 0 (Haptens) RN - 207137-56-2 (Interleukin-4) SB - IM MH - Animals MH - CD11b Antigen/genetics/*immunology MH - Cell Differentiation/*drug effects/genetics/immunology MH - Epithelial Cell Adhesion Molecule/genetics/*immunology MH - Haptens/*pharmacology MH - Interleukin-4/genetics/immunology MH - Langerhans Cells/*immunology MH - Mice MH - Mice, Knockout MH - Th2 Cells/*immunology EDAT- 2017/10/04 06:00 MHDA- 2017/10/27 06:00 CRDT- 2017/10/04 06:00 PHST- 2016/07/21 00:00 [received] PHST- 2017/09/06 00:00 [accepted] PHST- 2017/10/04 06:00 [pubmed] PHST- 2017/10/27 06:00 [medline] PHST- 2017/10/04 06:00 [entrez] AID - jimmunol.1601262 [pii] AID - 10.4049/jimmunol.1601262 [doi] PST - ppublish SO - J Immunol. 2017 Nov 1;199(9):3137-3146. doi: 10.4049/jimmunol.1601262. Epub 2017 Oct 2.