PMID- 25245013 OWN - NLM STAT- MEDLINE DCOM- 20150805 LR - 20141216 IS - 1878-3279 (Electronic) IS - 0171-2985 (Linking) VI - 220 IP - 2 DP - 2015 Feb TI - Mode of dendritic cell activation: the decisive hand in Th2/Th17 cell differentiation. Implications in asthma severity? PG - 254-61 LID - S0171-2985(14)00177-6 [pii] LID - 10.1016/j.imbio.2014.09.016 [doi] AB - Asthma is a heterogeneous chronic inflammatory disease of the airways, with reversible airflow limitations and airway remodeling. The classification of asthma phenotypes was initially based on different combinations of clinical symptoms, but they are now unfolding to link biology to phenotype. As such, patients can suffer from a predominant eosinophilic, neutrophilic or even mixed eosinophilic/neutrophilic inflammatory response. In adult asthma patients, eosinophilic inflammation is usually seen in mild-to-moderate disease and neutrophilic inflammation in more severe disease. The underlying T cell response is predominated by T helper (Th) 2, Th17, or a mixed Th2/Th17 cell immune response. Dendritic cells (DCs) are "professional" antigen presenting cells (APCs), since their principal function is to present antigens and induce a primary immune response in resting naive T cells. DCs also drive the differentiation into distinctive Th subsets. The expression of co-stimulatory molecules and cytokines by DCs and surrounding cells determines the outcome of Th cell differentiation. The nature of DC activation will determine the expression of specific co-stimulatory molecules and cytokines, specifically needed for induction of the different Th cell programs. Thus DC activation is crucial for the subsequent effector Th immune responses. In this review, we will discuss underlying mechanisms that initiate DC activation in favor of Th2 differentiation versus Th1/Th17 and Th17 differentiation in the development of mild versus moderate to severe asthma. CI - Copyright (c) 2014 Elsevier GmbH. All rights reserved. FAU - Vroman, Heleen AU - Vroman H AD - Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands. FAU - van den Blink, Bernt AU - van den Blink B AD - Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands. FAU - Kool, Mirjam AU - Kool M AD - Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands. Electronic address: m.kool@erasmusmc.nl. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20140916 PL - Netherlands TA - Immunobiology JT - Immunobiology JID - 8002742 RN - 0 (Antigens) SB - IM MH - Animals MH - Antigen Presentation/immunology MH - Antigens/immunology MH - Asthma/immunology/metabolism MH - Cell Communication/immunology MH - Cell Differentiation MH - Dendritic Cells/*immunology/*metabolism MH - Humans MH - Lung/immunology/metabolism MH - Lymphocyte Activation/immunology MH - Phenotype MH - Pyroglyphidae/immunology MH - Signal Transduction MH - Th17 Cells/cytology/immunology/metabolism MH - Th2 Cells/cytology/immunology/metabolism OTO - NOTNLM OT - Asthma OT - Dendritic cells OT - Eosinophils OT - Neutrophils OT - T helper 17 cells OT - T helper 2 cells EDAT- 2014/09/24 06:00 MHDA- 2015/08/06 06:00 CRDT- 2014/09/24 06:00 PHST- 2014/05/16 00:00 [received] PHST- 2014/08/12 00:00 [revised] PHST- 2014/09/05 00:00 [accepted] PHST- 2014/09/24 06:00 [entrez] PHST- 2014/09/24 06:00 [pubmed] PHST- 2015/08/06 06:00 [medline] AID - S0171-2985(14)00177-6 [pii] AID - 10.1016/j.imbio.2014.09.016 [doi] PST - ppublish SO - Immunobiology. 2015 Feb;220(2):254-61. doi: 10.1016/j.imbio.2014.09.016. Epub 2014 Sep 16.