Interleukin 15 Skews Monocyte Differentiation into Dendritic Cells with Features of Langerhans Cells
Overview
General Medicine
Authors
Affiliations
Langerhans cells (LCs) represent a subset of immature dendritic cells (DCs) specifically localized in the epidermis and other mucosal epithelia. As surrounding keratinocytes can produce interleukin (IL)-15, a cytokine that utilizes IL-2Rgamma chain, we analyzed whether IL-15 could skew monocyte differentiation into LCs. Monocytes cultured for 6 d with granulocyte/macrophage colony-stimulating factor (GM-CSF) and IL-15 differentiate into CD1a(+)HLA-DR(+)CD14(-)DCs (IL15-DCs). Agents such as lipopolysaccharide (LPS), tumor necrosis factor (TNF)alpha, and CD40L induce maturation of IL15-DCs to CD83(+), DC-LAMP(+) cells. IL15-DCs are potent antigen-presenting cells able to induce the primary (mixed lymphocyte reaction [MLR]) and secondary (recall responses to flu-matrix peptide) immune responses. As opposed to cultures made with GM-CSF/IL-4 (IL4-DCs), a proportion of IL15-DCs expresses LC markers: E-Cadherin, Langerin, and CC chemokine receptor (CCR)6. Accordingly, IL15-DCs, but not IL4-DCs, migrate in response to macrophage inflammatory protein (MIP)-3alpha/CCL20. However, IL15-DCs cannot be qualified as "genuine" Langerhans cells because, despite the presence of the 43-kD Langerin, they do not express bona fide Birbeck granules. Thus, our results demonstrate a novel pathway in monocyte differentiation into dendritic cells.
The immunoreactive signature of monocyte-derived dendritic cells from patients with Down syndrome.
Nakashima K, Imai T, Shiraishi A, Unose R, Goto H, Nagatomo Y Clin Exp Immunol. 2024; 217(3):291-299.
PMID: 38916251 PMC: 11310712. DOI: 10.1093/cei/uxae048.
Skariah N, James O, Swamy M Discov Immunol. 2024; 3(1):kyae002.
PMID: 38405398 PMC: 10883678. DOI: 10.1093/discim/kyae002.
Langerin-expressing dendritic cells in pulmonary immune-related diseases.
Xuan S, Li Y, Wu Y, Adcock I, Zeng X, Yao X Front Med (Lausanne). 2022; 9:909057.
PMID: 36160158 PMC: 9490018. DOI: 10.3389/fmed.2022.909057.
The Roles of Skin Langerhans Cells in Immune Tolerance and Cancer Immunity.
Zhou L, Jiang A, Veenstra J, Ozog D, Mi Q Vaccines (Basel). 2022; 10(9).
PMID: 36146458 PMC: 9503294. DOI: 10.3390/vaccines10091380.
CSF1R defines the mononuclear phagocyte system lineage in human blood in health and COVID-19.
Combes T, Orsenigo F, Stewart A, Mendis A, Dunn-Walters D, Gordon S Immunother Adv. 2022; 1(1):ltab003.
PMID: 35915730 PMC: 7928847. DOI: 10.1093/immadv/ltab003.