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Marschall P, Wei R, Segaud J, Yao W, Hener P, German BF, Meyer P, Hugel C, Ada Da Silva G, Braun R, Kaplan DH, Li M. Dual function of Langerhans cells in skin TSLP-promoted T FH differentiation in mouse atopic dermatitis. J Allergy Clin Immunol 2021; 147:1778-1794. [PMID: 33068561 DOI: 10.1016/j.jaci.2020.10.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 09/29/2020] [Accepted: 10/05/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Atopic dermatitis (AD) is among the most common chronic inflammatory skin diseases, usually occurring early in life, and often preceding other atopic diseases such as asthma. TH2 has been believed to play a crucial role in cellular and humoral response in AD, but accumulating evidence has shown that follicular helper T cell (TFH), a critical player in humoral immunity, is associated with disease severity and plays an important role in AD pathogenesis. OBJECTIVES This study aimed at investigating how TFHs are generated during the pathogenesis of AD, particularly what is the role of keratinocyte-derived cytokine TSLP and Langerhans cells (LCs). METHODS Two experimental AD mouse models were employed: (1) triggered by the overproduction of TSLP through topical application of MC903, and (2) induced by epicutaneous allergen ovalbumin (OVA) sensitization. RESULTS This study demonstrated that the development of TFHs and germinal center (GC) response were crucially dependent on TSLP in both the MC903 model and the OVA sensitization model. Moreover, we found that LCs promoted TFH differentiation and GC response in the MC903 model, and the depletion of Langerin+ dendritic cells (DCs) or selective depletion of LCs diminished the TFH/GC response. By contrast, in the model with OVA sensitization, LCs inhibited TFH/GC response and suppressed TH2 skin inflammation and the subsequent asthma. Transcriptomic analysis of Langerin+ and Langerin- migratory DCs revealed that Langerin+ DCs became activated in the MC903 model, whereas these cells remained inactivated in OVA sensitization model. CONCLUSIONS Together, these studies revealed a dual functionality of LCs in TSLP-promoted TFH and TH2 differentiation in AD pathogenesis.
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Affiliation(s)
- Pierre Marschall
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Ruicheng Wei
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Justine Segaud
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Wenjin Yao
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Pierre Hener
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Beatriz Falcon German
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Pierre Meyer
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Cecile Hugel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | - Grace Ada Da Silva
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France
| | | | - Daniel H Kaplan
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, Pa; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pa
| | - Mei Li
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique Unite Mixte de Recherche 7104, Institut National de la Santé et de la Recherch Médicale U1258, Université de Strasbourg, Illkirch, France.
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