title: Development of interleukin-17-producing γδ T cells is restricted to a functional embryonic wave.
abstract: γδ T cells are an important innate source of interleukin-17 (IL-17). In contrast to T helper 17 (Th17) cell differentiation, which occurs in the periphery, IL-17-producing γδ T cells (γδT17 cells) are probably committed during thymic development. To study when γδT17 cells arise during ontogeny, we used TcrdH2BeGFP reporter mice to monitor T cell receptor (TCR) rearrangement and IL-17 production in the embryonic thymus. We observed that several populations such as innate lymphoid cells and early T cell precursors were able to produce IL-17 prior to (and thus independent of) TCR recombination. γδT17 cells were absent after transplantation of IL-17-sufficient bone marrow into mice lacking both Il17a and Il17f. Also, γδT17 cells were not generated after genetic restoration of defective Rag1 function in adult mice. Together, these data suggested that these cells developed exclusively before birth and subsequently persisted in adult mice as self-renewing, long-lived cells.
authors: Institute of Immunology, Hannover Medical School, Hannover, Germany.
authors: Jan D
authors: JD
authors: Haas
authors: Sarina
authors: S
authors: Ravens
authors: Sandra
authors: S
authors: Düber
authors: Inga
authors: I
authors: Sandrock
authors: Linda
authors: L
authors: Oberdörfer
authors: Elham
authors: E
authors: Kashani
authors: Vijaykumar
authors: V
authors: Chennupati
authors: Lisa
authors: L
authors: Föhse
authors: Ronald
authors: R
authors: Naumann
authors: Siegfried
authors: S
authors: Weiss
authors: Andreas
authors: A
authors: Krueger
authors: Reinhold
authors: R
authors: Förster
authors: Immo
authors: I
authors: Prinz
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000378:metabolism; D046528:Chimerism; D006706:Homeostasis / Q000276:immunology; D007113:Immunity, Innate; D020381:Interleukin-17 / Q000096:biosynthesis* / Q000172:deficiency / Q000235:genetics; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology / Q000378:metabolism; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000276:immunology* / Q000378:metabolism*; D054399:Receptors, CCR6 / Q000378:metabolism; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism*; D060168:Thymocytes / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D013950:Thymus Gland / Q000196:embryology / Q000378:metabolism; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7 / Q000378:metabolism
chemical_list: D020381:Interleukin-17; D016693:Receptors, Antigen, T-Cell, alpha-beta; D016692:Receptors, Antigen, T-Cell, gamma-delta; D054399:Receptors, CCR6; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7