Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses

BACKGROUND/AIMS: Although a cross-talk between immune and endocrine systems has been well established, the precise pathways by which these signals co-regulate pro- and antiinflammatory responses on antigen-presenting cells remain poorly understood. In this work we investigated the mechanisms by whic...

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Publicado:	2019
Materias:	Adaptive immunity Dendritic cells Pro-inflammatory signals Th17 Triiodothyronine γδ-T cells Cd274 protein, mouse interferon regulatory factor interferon regulatory factor-4 interleukin 17 liothyronine lymphocyte antigen receptor Pdcd1lg2 protein, mouse programmed death 1 ligand 1 programmed death 1 ligand 2 animal CD4+ T lymphocyte cell proliferation dendritic cell drug effect gene expression regulation genetics immunology inflammation knockout mouse mouse natural killer cell pathology signal transduction Animals B7-H1 Antigen CD4-Positive T-Lymphocytes Cell Proliferation Dendritic Cells Gene Expression Regulation Inflammation Interferon Regulatory Factors Interleukin-17 Killer Cells, Natural Mice Mice, Knockout Programmed Cell Death 1 Ligand 2 Protein Receptors, Antigen, T-Cell, gamma-delta Signal Transduction
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14219778_v52_n2_p354_Alamino http://hdl.handle.net/20.500.12110/paper_14219778_v52_n2_p354_Alamino
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_14219778_v52_n2_p354_Alamino
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spelling	paper:paper_14219778_v52_n2_p354_Alamino2023-06-08T16:13:47Z Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses Adaptive immunity Dendritic cells Pro-inflammatory signals Th17 Triiodothyronine γδ-T cells Cd274 protein, mouse interferon regulatory factor interferon regulatory factor-4 interleukin 17 liothyronine lymphocyte antigen receptor Pdcd1lg2 protein, mouse programmed death 1 ligand 1 programmed death 1 ligand 2 animal CD4+ T lymphocyte cell proliferation dendritic cell drug effect gene expression regulation genetics immunology inflammation knockout mouse mouse natural killer cell pathology signal transduction Animals B7-H1 Antigen CD4-Positive T-Lymphocytes Cell Proliferation Dendritic Cells Gene Expression Regulation Inflammation Interferon Regulatory Factors Interleukin-17 Killer Cells, Natural Mice Mice, Knockout Programmed Cell Death 1 Ligand 2 Protein Receptors, Antigen, T-Cell, gamma-delta Signal Transduction Triiodothyronine BACKGROUND/AIMS: Although a cross-talk between immune and endocrine systems has been well established, the precise pathways by which these signals co-regulate pro- and antiinflammatory responses on antigen-presenting cells remain poorly understood. In this work we investigated the mechanisms by which triiodothyronine (T3) controls T cell activity via dendritic cell (DC) modulation. METHODS: DCs from wild-type (WT) and IL-6-deficient mice were pulsed with T3. Cytokine production and programmed death protein ligands (PD-L) 1 and 2 expression were assayed by flow cytometry and ELISA. Interferon-regulatory factor-4 (IRF4) expression was evaluated by RT-qPCR and flow cytometry. The ability of DCs to stimulate allogenic splenocytes was assessed in a mixed lymphocyte reaction and the different profile markers were analyzed by flow cytometry and ELISA. For in vivo experiments, DCs treated with ovalbumin and T3 were injected into OTII mice. Proliferation, cytokine production, frequency of FoxP3+ regulatory T (Treg) cells and PD-1+ cells were determined by MTT assay, ELISA and flow cytometry, respectively. RESULTS: T3 endows DCs with pro-inflammatory potential capable of generating IL-17-dominant responses and down-modulating expression of PD-L1 and 2. T3-stimulated WT-DCs increased the proportion of IL-17-producing splenocytes, an effect which was eliminated when splenocytes were incubated with T3-treated DCs derived from IL-6-deficient mice. Enhanced IL-17 expression was recorded in both, CD4- and CD4+ populations and involved the IRF-4 pathway. Particularly, γδ-T cells but not natural killer (NK), NKT, B lymphocytes nor CD8+ T cells were the major source of IL-17-production from CD4- cells. Moreover, T3-conditioned DCs promoted a decrease of the FoxP3+ Treg population. Furthermore, T3 down-modulated PD-1 expression on CD4- cells thereby limiting inhibitory signals driven by this co-inhibitory pathway. Thus, T3 acts at the DC level to drive proinflammatory responses in vitro. Accordingly, we found that T3 induces IL-17 and IFNγ-dominant antigen-specific responses in vivo. CONCLUSION: These results emphasize the relevance of T3 as an additional immune-endocrine checkpoint and a novel therapeutic target to modulate IL-17-mediated pro-inflammatory responses. © Copyright by the Author(s). Published by Cell Physiol Biochem Press. 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14219778_v52_n2_p354_Alamino http://hdl.handle.net/20.500.12110/paper_14219778_v52_n2_p354_Alamino
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Adaptive immunity Dendritic cells Pro-inflammatory signals Th17 Triiodothyronine γδ-T cells Cd274 protein, mouse interferon regulatory factor interferon regulatory factor-4 interleukin 17 liothyronine lymphocyte antigen receptor Pdcd1lg2 protein, mouse programmed death 1 ligand 1 programmed death 1 ligand 2 animal CD4+ T lymphocyte cell proliferation dendritic cell drug effect gene expression regulation genetics immunology inflammation knockout mouse mouse natural killer cell pathology signal transduction Animals B7-H1 Antigen CD4-Positive T-Lymphocytes Cell Proliferation Dendritic Cells Gene Expression Regulation Inflammation Interferon Regulatory Factors Interleukin-17 Killer Cells, Natural Mice Mice, Knockout Programmed Cell Death 1 Ligand 2 Protein Receptors, Antigen, T-Cell, gamma-delta Signal Transduction Triiodothyronine
spellingShingle	Adaptive immunity Dendritic cells Pro-inflammatory signals Th17 Triiodothyronine γδ-T cells Cd274 protein, mouse interferon regulatory factor interferon regulatory factor-4 interleukin 17 liothyronine lymphocyte antigen receptor Pdcd1lg2 protein, mouse programmed death 1 ligand 1 programmed death 1 ligand 2 animal CD4+ T lymphocyte cell proliferation dendritic cell drug effect gene expression regulation genetics immunology inflammation knockout mouse mouse natural killer cell pathology signal transduction Animals B7-H1 Antigen CD4-Positive T-Lymphocytes Cell Proliferation Dendritic Cells Gene Expression Regulation Inflammation Interferon Regulatory Factors Interleukin-17 Killer Cells, Natural Mice Mice, Knockout Programmed Cell Death 1 Ligand 2 Protein Receptors, Antigen, T-Cell, gamma-delta Signal Transduction Triiodothyronine Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses
topic_facet	Adaptive immunity Dendritic cells Pro-inflammatory signals Th17 Triiodothyronine γδ-T cells Cd274 protein, mouse interferon regulatory factor interferon regulatory factor-4 interleukin 17 liothyronine lymphocyte antigen receptor Pdcd1lg2 protein, mouse programmed death 1 ligand 1 programmed death 1 ligand 2 animal CD4+ T lymphocyte cell proliferation dendritic cell drug effect gene expression regulation genetics immunology inflammation knockout mouse mouse natural killer cell pathology signal transduction Animals B7-H1 Antigen CD4-Positive T-Lymphocytes Cell Proliferation Dendritic Cells Gene Expression Regulation Inflammation Interferon Regulatory Factors Interleukin-17 Killer Cells, Natural Mice Mice, Knockout Programmed Cell Death 1 Ligand 2 Protein Receptors, Antigen, T-Cell, gamma-delta Signal Transduction Triiodothyronine
description	BACKGROUND/AIMS: Although a cross-talk between immune and endocrine systems has been well established, the precise pathways by which these signals co-regulate pro- and antiinflammatory responses on antigen-presenting cells remain poorly understood. In this work we investigated the mechanisms by which triiodothyronine (T3) controls T cell activity via dendritic cell (DC) modulation. METHODS: DCs from wild-type (WT) and IL-6-deficient mice were pulsed with T3. Cytokine production and programmed death protein ligands (PD-L) 1 and 2 expression were assayed by flow cytometry and ELISA. Interferon-regulatory factor-4 (IRF4) expression was evaluated by RT-qPCR and flow cytometry. The ability of DCs to stimulate allogenic splenocytes was assessed in a mixed lymphocyte reaction and the different profile markers were analyzed by flow cytometry and ELISA. For in vivo experiments, DCs treated with ovalbumin and T3 were injected into OTII mice. Proliferation, cytokine production, frequency of FoxP3+ regulatory T (Treg) cells and PD-1+ cells were determined by MTT assay, ELISA and flow cytometry, respectively. RESULTS: T3 endows DCs with pro-inflammatory potential capable of generating IL-17-dominant responses and down-modulating expression of PD-L1 and 2. T3-stimulated WT-DCs increased the proportion of IL-17-producing splenocytes, an effect which was eliminated when splenocytes were incubated with T3-treated DCs derived from IL-6-deficient mice. Enhanced IL-17 expression was recorded in both, CD4- and CD4+ populations and involved the IRF-4 pathway. Particularly, γδ-T cells but not natural killer (NK), NKT, B lymphocytes nor CD8+ T cells were the major source of IL-17-production from CD4- cells. Moreover, T3-conditioned DCs promoted a decrease of the FoxP3+ Treg population. Furthermore, T3 down-modulated PD-1 expression on CD4- cells thereby limiting inhibitory signals driven by this co-inhibitory pathway. Thus, T3 acts at the DC level to drive proinflammatory responses in vitro. Accordingly, we found that T3 induces IL-17 and IFNγ-dominant antigen-specific responses in vivo. CONCLUSION: These results emphasize the relevance of T3 as an additional immune-endocrine checkpoint and a novel therapeutic target to modulate IL-17-mediated pro-inflammatory responses. © Copyright by the Author(s). Published by Cell Physiol Biochem Press.
title	Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses
title_short	Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses
title_full	Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses
title_fullStr	Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses
title_full_unstemmed	Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses
title_sort	dendritic cells exposed to triiodothyronine deliver pro-inflammatory signals and amplify il-17-driven immune responses
publishDate	2019
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14219778_v52_n2_p354_Alamino http://hdl.handle.net/20.500.12110/paper_14219778_v52_n2_p354_Alamino
_version_	1768542564884938752

Dendritic Cells Exposed to Triiodothyronine Deliver Pro-Inflammatory Signals and Amplify IL-17-Driven Immune Responses

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