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Halter S, Rosenzwajg M, Klatzmann D, Sitbon A, Monsel A. Regulatory T Cells in Acute Respiratory Distress Syndrome: Current Status and Potential for Future Immunotherapies. Anesthesiology 2024:141759. [PMID: 39037703 DOI: 10.1097/aln.0000000000005047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Affiliation(s)
- Sébastien Halter
- Multidisciplinary Intensive Care Unit, Department of Anesthesiology and Critical Care, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris Sorbonne University, Paris, France; Sorbonne University-INSERM UMRS_959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France; and Biotherapy (CIC-BTi), Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Michelle Rosenzwajg
- Sorbonne University-INSERM UMRS_959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France; Biotherapy (CIC-BTi), Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - David Klatzmann
- Sorbonne University-INSERM UMRS_959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France; Biotherapy (CIC-BTi), Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Alexandre Sitbon
- Multidisciplinary Intensive Care Unit, Department of Anesthesiology and Critical Care, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris Sorbonne University, Paris, France; Sorbonne University, INSERM, Centre de Recherche de Saint-Antoine, UMRS-938, Paris, France
| | - Antoine Monsel
- Multidisciplinary Intensive Care Unit, Department of Anesthesiology and Critical Care, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris Sorbonne University, Paris, France; Sorbonne University-INSERM UMRS_959, Immunology-Immunopathology-Immunotherapy (I3), 75013 Paris, France; Biotherapy (CIC-BTi), Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
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Liu Y, Yuan Y, Zhou Z, Jiang X, He S, Wei F, Cui Y, Yang L, Zhao G. Mettl14 sustains FOXP3 expression to promote the differentiation and functions of induced-regulatory T cells via the mTOR signaling pathway. Immunol Lett 2023; 258:35-44. [PMID: 37121553 DOI: 10.1016/j.imlet.2023.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/23/2023] [Accepted: 04/26/2023] [Indexed: 05/02/2023]
Abstract
Induced regulatory T cell (iTregs) can be generated in vitro. Thus, iTregs-based therapeutics are receiving increased attention for their potential to treat autoimmune diseases and prevent transplant rejection. However, iTregs fail to maintain FoxP3 expression and suppressive activity, which limits their clinical application. Increasing lines of evidence suggest that methyltransferase-like 14 (METTL14), a critical component of the m6A writer complex, regulates the stability and function of the Treg cells. However, beyond meeting the epigenetic modification of Treg cells, whether Mettl14 plays a role in the fate determination of iTregs is unclear. Here, we systemically investigated the potential function of METTL14 in iTregs differentiation and regulatory activity. In our study, iTregs were generated from CD4+ naïve T cells under iTreg-polarizing conditions, we found that the expression of METTL14 was increased in iTregs compared with CD4+ naïve T cells. Subsequently, the expression of METTL14 was knocked down by siRNA-METTL14 interference in CD4+ naïve T cells and cultured under iTreg-polarizing conditions. According to the results, Mettl14 deficiency resulted in the disruption of iTregs differentiation evidenced by the limited FoxP3 expression. Meanwhile, inflammatory cytokines such as IFN-γ and IL-17a were upregulated in cultured iTregs. We next determined the functional change in METTL14-deficient iTregs. The results of the colitis development in Rag1-/- mice and CFSE assays revealed that loss of METTL14 significantly compromised the suppressive function of iTregs in vivo and in vitro. We further checked the altered signaling pathway in METTL14-deficient iTregs. We found that reduced METTL14 leads to activation of the mTOR pathway with increased p-mTOR and p-p70S6K, which are known to modulate the suppressive function of iTregs. In conclusion, our study revealed that Mettl14 plays a critical role in the development and suppressive function of iTregs in vitro and could thus serve as a regulatory element for stabilizing iTregs in cell-based therapy.
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Affiliation(s)
- Yanzhuo Liu
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China
| | - Yinglin Yuan
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China
| | - Zili Zhou
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China
| | - Xiaomei Jiang
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China
| | - Shu He
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Institute of Neurology, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610072, PR China
| | - Fan Wei
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Institute of Neurology, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610072, PR China
| | - Yuanyuan Cui
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China
| | - Lu Yang
- Institute of Neurology, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610072, PR China.
| | - Gaoping Zhao
- Department of Gastrointestinal Surgery, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China; Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, Sichuan Province, China.
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Tian L, Zhang Q, Cong Y, Yan W. Preparation, Identification and Application of β-Lactoglobulin Hydrolysates with Oral Immune Tolerance. Foods 2023; 12:foods12020307. [PMID: 36673400 PMCID: PMC9857568 DOI: 10.3390/foods12020307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/16/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
To reveal, for the first time, the mechanism of T cell epitope release from β-lactoglobulin that induces oral immune tolerance, a strategy for the prediction, preparation, identification and application of β-lactoglobulin hydrolysate with oral immune tolerance was established using the bioinformatics method, hydrolysis, mass spectrometry, T cell proliferation assays and animal experiments. Some T cell epitope peptides of β-lactoglobulin were identified for the first time. The hydrolysates of trypsin, protamex and papain showed oral tolerance, among which the hydrolysates of protamex and papain have been reported for the first time. Although the neutral protease hydrolysate contained T cell epitopes, it still had allergenicity. The mechanism behind oral immune tolerance induction by T cell epitopes needs to be further revealed. In addition, the trypsin hydrolysate with abundant T cell epitopes was added to whey protein to prepare the product for oral immune tolerance. Overall, this study provides insights into the development of new anti-allergic milk-based products and their application in the clinical treatment of milk allergies.
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Affiliation(s)
- Linghan Tian
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, College of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Qianqian Zhang
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, College of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Yanjun Cong
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, College of Food and Health, Beijing Technology and Business University, Beijing 100048, China
- Correspondence:
| | - Wenjie Yan
- College of Biochemical Engineering, Beijing Union University, Beijing 100023, China
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Sun J, Wei J, Zhang Y, Li J, Li J, Yan J, Guo M, Han J, Qiao H. Plasma Exosomes Transfer miR-885-3p Targeting the AKT/NFκB Signaling Pathway to Improve the Sensitivity of Intravenous Glucocorticoid Therapy Against Graves Ophthalmopathy. Front Immunol 2022; 13:819680. [PMID: 35265076 PMCID: PMC8900193 DOI: 10.3389/fimmu.2022.819680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 01/20/2022] [Indexed: 12/13/2022] Open
Abstract
Graves ophthalmopathy (GO), a manifestation of Graves' disease, is an organ-specific autoimmune disease. Intravenous glucocorticoid therapy (ivGCs) is the first-line treatment for moderate-to-severe and active GO. However, ivGCs is only effective in 70%-80% of GO patients. Insensitive patients who choose 12-week ivGCs not only were delayed in treatment but also took the risk of adverse reactions of glucocorticoids. At present, there is still a lack of effective indicators to predict the therapeutic effect of ivGCs. Therefore, the purpose of this study is to find biomarkers that can determine the sensitivity of ivGCs before the formulation of treatment, and to clarify the mechanism of its regulation of ivGCs sensitivity. This study first characterized the miRNA profiles of plasma exosomes by miRNA sequencing to identify miRNAs differentially expressed between GO patients with significant improvement (SI) and non-significant improvement (NSI) after ivGCs treatment. Subsequently, we analyzed the function of the predicted target genes of differential miRNAs. According to the function of the target genes, we screened 10 differentially expressed miRNAs. An expanded cohort verification showed that compared with NSI patients, mir-885-3p was upregulated and mir-4474-3p and mir-615-3p were downregulated in the exosomes of SI patients. Based on statistical difference and miRNA function, mir-885-3p was selected for follow-up study. The in vitro functional analysis of exosomes mir-885-3p showed that exosomes from SI patients (SI-exo) could transfer mir-885-3p to orbital fibroblasts (OFs), upregulate the GRE luciferase reporter gene plasmid activity and the level of glucocorticoid receptor (GR), downregulate the level of inflammatory factors, and improve the glucocorticoid sensitivity of OFs. Moreover, these effects can be inhibited by the corresponding miR inhibitor. In addition, we found that high levels of mir-885-3p could inhibit the AKT/NFκB signaling pathway, upregulate the GRE plasmid activity and GR level, and downregulate the level of inflammatory factors of OFs. Moreover, the improvement of glucocorticoid sensitivity by mir-885-3p transmitted by SI-exo can also be inhibited by the AKT/NFκB agonist. Finally, through the in vivo experiment of the GO mouse model, we further determined the relationship between exosomes' mir-885-3p sequence, AKT/NFκB signaling pathway, and glucocorticoid sensitivity. As a conclusion, plasma exosomes deliver mir-885-3p and inhibit the AKT/NFκB signaling pathway to improve the glucocorticoid sensitivity of OFs. Exosome mir-885-3p can be used as a biomarker to determine the sensitivity of ivGCs in GO patients.
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Affiliation(s)
- Jingxue Sun
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jiaxing Wei
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yaguang Zhang
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jingjing Li
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jian Li
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jiazhuo Yan
- Department of Gynecological Radiotherapy, Harbin Medical University Cancer Hospital, Harbin, China
| | - Min Guo
- Department of Endocrinology and Metabolism, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jun Han
- Department of Endocrinology and Metabolism, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Hong Qiao
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Wang C, Huang CF, Li M. Sodium houttuynia alleviates airway inflammation in asthmatic mice by regulating FoxP3/RORγT expression and reversing Treg/Th17 cell imbalance. Int Immunopharmacol 2021; 103:108487. [PMID: 34959187 DOI: 10.1016/j.intimp.2021.108487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/03/2021] [Accepted: 12/16/2021] [Indexed: 11/05/2022]
Abstract
Synthetized from a natural oil of Houttuynia cordata, sodium houttuynia was reported to have anti-inflammatory effects. The present study aimed to investigate whether sodium houttuynia could alleviate the characteristic airway inflammation and Treg/Th17 cell imbalance of asthma in vivo. Experimental mice with neutrophilic asthma were injected with sodium houttuynia or dexamethasone (alone or in combination) intraperitoneally. The airway reactivity was measured, and bronchoalveolar lavage fluid was collected for cell count. Hematoxylin/eosin and periodic acid-Schiff staining were performed to assess pulmonary inflammation and mucus hypersecretion. Immunohistochemical analysis was conducted to determine the expression of IL-10, IL-17A, FoxP3, and RORγT in the lung tissue, and the serum levels of IL-10 and IL-17A were analyzed by ELISA. The proportion of CD4+CD25+FoxP3+ Treg and Th17 cells within the CD4+ T cell subset of splenocytes was analyzed by flow cytometry. FoxP3 and RORγT mRNA and protein expressions in the lung were analyzed by real-time PCR and western blot, respectively. Overall, sodium houttuynia was found to ameliorate the Treg/Th17 cell imbalance and reduce the airway inflammation, hyperresponsiveness, and mucus hypersecretion by increasing the frequency of CD4+CD25+FoxP3+ Treg cells and the secretion of IL-10, while decreasing the proportion of Th17 cells and IL-17A production. Although the regulatory effect of sodium houttuynia was not as good as that achieved with dexamethasone, combination of the two compounds showed improved inhibitory effects on airway hyperresponsiveness, inflammation, and mucus hypersecretion. Hence, sodium houttuynia may be beneficial for the treatment of asthma.
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Affiliation(s)
- Chao Wang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Chen-Feng Huang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Miao Li
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China.
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Siomkajło M, Mizera Ł, Szymczak D, Kolačkov K, Grzegrzółka J, Bolanowski M, Daroszewski J. Effect of systemic steroid therapy in Graves' orbitopathy on regulatory T cells and Th17/Treg ratio. J Endocrinol Invest 2021; 44:2475-2484. [PMID: 33866536 DOI: 10.1007/s40618-021-01565-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 03/29/2021] [Indexed: 12/16/2022]
Abstract
PURPOSE Glucocorticoids are a mainstay treatment for Graves' orbitopathy, yet their exact mechanisms of action remain unclear. We aimed to determine whether the therapeutic effects of systemic steroid therapy in Graves' orbitopathy are mediated by changes in regulatory T lymphocytes (Tregs) and T helper 17 lymphocytes (Th17). METHODS We assessed Treg and Th17 levels in the peripheral blood of 32 patients with active, moderate-to-severe Graves' orbitopathy who received 12 weekly pulses of methylprednisolone, and determined their association with disease severity, disease activity, and treatment outcomes. The acute orbitopathy phase was confirmed based on clinical evaluation and magnetic resonance imaging, and assessed using the clinical activity score (CAS). The severity of the disease was classified according to ETA/EUGOGO guidelines, and quantified based on the total eye score. Treatment response was determined based on specific criteria (e.g., changes in CAS score, diplopia grade, visual acuity, etc.). Treg and Th17 cells were identified using flow cytometry. RESULTS Methylprednisolone treatment improved the activity of the disease and altered the Th17/Treg balance (i.e., the percentage of Tregs decreased while the number of Th17 cells remained unchanged). There was no association between the Treg/Th17 ratio and the activity and severity of the disease or the treatment response. CONCLUSIONS Therapeutic effects of steroid therapy in Graves' orbitopathy are not mediated by Treg and Th17 alterations in the peripheral blood. The decrease in peripheral Treg percentage is likely a consequence of the non-specific effects of steroids and does not impact clinical outcome.
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Affiliation(s)
- M Siomkajło
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, L. Pasteur 4, 50-367, Wroclaw, Poland.
| | - Ł Mizera
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, L. Pasteur 4, 50-367, Wroclaw, Poland
| | - D Szymczak
- Department of Haematology, Blood Neoplasms and Bone Marrow Transplantation, Wroclaw Medical University, L. Pasteur 4, 50-367, Wroclaw, Poland
| | - K Kolačkov
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, L. Pasteur 4, 50-367, Wroclaw, Poland
| | - J Grzegrzółka
- Department of Human Morphology and Embryology, Wroclaw Medical University, T. Chalubinskiego 6a, 50-368, Wroclaw, Poland
| | - M Bolanowski
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, L. Pasteur 4, 50-367, Wroclaw, Poland
| | - J Daroszewski
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, L. Pasteur 4, 50-367, Wroclaw, Poland
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Wagner JC, Leicht S, Hofmann M, Seifert F, Gahn S, Germer CT, Beyersdorf N, Otto C, Klein I. CD28 Superagonist D665-mediated activation of mouse regulatory T cells maintains their phenotype without loss of suppressive quality. Immunobiology 2021; 226:152144. [PMID: 34624625 DOI: 10.1016/j.imbio.2021.152144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 09/14/2021] [Accepted: 09/26/2021] [Indexed: 01/07/2023]
Abstract
Regulatory T cells (Tregs) maintain immune homeostasis by regulating the activation of other immune cells. Preclinical studies show that the infusion of Tregs can promote immunological tolerance to allografts and prevent or cure multiple autoimmune diseases. However, Treg therapy is limited by high numbers of cells required to induce tolerance. In this study, we aimed at improving the in vitro expansion of sort purified mouse Tregs using the CD28 Superagonist (CD28-SA) D665 and comparing it to the conventional expansion using anti-CD3/anti-CD28 Dynabeads®. CD28-SA-stimulated Tregs expanded more than Dynabead®-stimulated Tregs while maintaining their phenotype by expressing the same level of CD4, CD25 and Foxp3. CD28-SA-expanded Tregs produced comparable amounts of IL-10 and TGFβ while showing a slightly superior suppressive capacity compared to Dynabead®-stimulated Tregs. Thus, stimulating murine Tregs with the CD28-SA is a promising alternative since it maintains their suppressive capacity without altering their phenotype and yields a higher fold expansion within 14 days.
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Affiliation(s)
- Johanna C Wagner
- Department of General, Visceral, Transplantation, Vascular and Pediatric Surgery, University of Würzburg Medical Center, Oberdürrbacherstr. 6, 97080 Würzburg, Germany; Department of Surgery, Division of Transplant Surgery, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, USA.
| | - Svenja Leicht
- Department of General, Visceral, Transplantation, Vascular and Pediatric Surgery, University of Würzburg Medical Center, Oberdürrbacherstr. 6, 97080 Würzburg, Germany; Experimental Visceral Surgery, Department of General, Visceral, Transplantation, Vascular, and Pediatric Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, D-97080 Würzburg, Germany
| | - Manuela Hofmann
- Experimental Visceral Surgery, Department of General, Visceral, Transplantation, Vascular, and Pediatric Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, D-97080 Würzburg, Germany
| | - Franziska Seifert
- Institute for Virology and Immunobiology, University of Würzburg, Versbacher Str. 7, 97078 Würzburg, Germany
| | - Sabine Gahn
- Experimental Visceral Surgery, Department of General, Visceral, Transplantation, Vascular, and Pediatric Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, D-97080 Würzburg, Germany
| | - Christoph-Thomas Germer
- Department of General, Visceral, Transplantation, Vascular and Pediatric Surgery, University of Würzburg Medical Center, Oberdürrbacherstr. 6, 97080 Würzburg, Germany; Comprehensive Cancer Center Mainfranken, Core Unit Bioinformatics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Niklas Beyersdorf
- Institute for Virology and Immunobiology, University of Würzburg, Versbacher Str. 7, 97078 Würzburg, Germany
| | - Christoph Otto
- Experimental Visceral Surgery, Department of General, Visceral, Transplantation, Vascular, and Pediatric Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, D-97080 Würzburg, Germany
| | - Ingo Klein
- Department of General, Visceral, Transplantation, Vascular and Pediatric Surgery, University of Würzburg Medical Center, Oberdürrbacherstr. 6, 97080 Würzburg, Germany; Comprehensive Cancer Center Mainfranken, Core Unit Bioinformatics, Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany; Experimental Visceral Surgery, Department of General, Visceral, Transplantation, Vascular, and Pediatric Surgery, University Hospital Würzburg, Oberdürrbacher Str. 6, D-97080 Würzburg, Germany
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Prenek L, Litvai T, Balázs N, Kugyelka R, Boldizsár F, Najbauer J, Németh P, Berki T. Regulatory T cells are less sensitive to glucocorticoid hormone induced apoptosis than CD4 + T cells. Apoptosis 2021; 25:715-729. [PMID: 32737651 PMCID: PMC7527366 DOI: 10.1007/s10495-020-01629-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Earlier we have reported that thymic regulatory T cells (Treg) are resistant to in vivo glucocorticoid hormone (GC)-induced apoptosis, while the most GC-sensitive DP thymocytes died through the activation of mitochondrial apoptotic pathway. Here we analyzed the apoptosis-inducing effect of high dose (10-6 M) in vitro dexamethasone (DX) treatment in mouse thymic- and splenic Tregs and CD4+ T cells. Activation of both extrinsic and intrinsic apoptotic pathways started after 2 h of DX treatment in CD4 SP thymocytes and was 3 × higher than in CD4+ splenocytes, while in Treg cells, weak activation of the extrinsic apoptotic pathway started only after 3 h. We also investigated the expression of 21 apoptosis-related molecules using a protein array and found higher level of both pro-and anti-apoptotic molecules in Tregs compared to CD4+ T cells. 4 h in vitro DX treatment induced upregulation of most apoptosis-related molecules both in Tregs and CD4+ T cells, except for the decrease of Bcl-2 expression in CD4+ T cells. We found high basal cytosolic Ca2+ levels in untreated Treg cells, which further increased after DX treatment, while the specific TCR-induced Ca2+ signal was lower in Tregs than in CD4+ T cells. Our results suggest that in the background of the relative apoptosis resistance of Treg cells to GCs might be their high basal cytosolic Ca2+ level and upregulated Bcl-2 expression. In contrast, downregulation of Bcl-2 expression in CD4+ T cells can explain their higher, DX-induced apoptosis sensitivity.
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Affiliation(s)
- Lilla Prenek
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Tímea Litvai
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Noémi Balázs
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Réka Kugyelka
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Ferenc Boldizsár
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - József Najbauer
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Péter Németh
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Timea Berki
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.
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