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李斯特菌病和结核病中 IL-4Rα 信号对 Foxp3 T 调节细胞的不同结果。

The divergent outcome of IL-4Rα signalling on Foxp3 T regulatory cells in listeriosis and tuberculosis.

机构信息

International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, Cape Town, South Africa.

Division of Immunology, Institute of Infectious Diseases and Molecular Medicine (IDM), Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.

出版信息

Front Immunol. 2024 Oct 17;15:1427055. doi: 10.3389/fimmu.2024.1427055. eCollection 2024.

DOI:10.3389/fimmu.2024.1427055
PMID:39483462
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11524857/
Abstract

INTRODUCTION

Forkhead box P3 (Foxp3) T regulatory cells are critical for maintaining self-tolerance, immune homeostasis, and regulating the immune system.

METHODS

We investigated interleukin-4 receptor alpha (IL-4Rα) signalling on T regulatory cells (Tregs) during () infection using a mouse model on a BALB/c background, specifically with IL-4Rα knockdown in Tregs (Foxp3IL-4Rα).

RESULTS

We showed an impairment of Treg responses, along with a decreased bacterial burden and diminished tissue pathology in the liver and spleen, which translated into better survival. Mechanistically, we observed an enhancement of the Th1 signature, characterised by increased expression of the T-bet transcription factor and a greater number of effector T cells producing IFN-γ, IL-2 following stimulation with heat-killed in Foxp3IL-4Rα mice. Furthermore, CD8 T cells from Foxp3IL-4Rα mice displayed increased cytotoxicity (Granzyme-B) with higher proliferation capacity (Ki-67), better survival (Bcl-2) with concomitant reduced apoptosis (activated caspase 3). In contrast to , Foxp3IL-4Rα mice displayed similar bacterial burdens, lung pathology and survival during () infection, despite increased T cell numbers and IFN-γ, TNF and IL-17 production.

CONCLUSION

Our results demonstrated that the diminished IL-4Rα signalling on Foxp3+ T regulatory cells resulted in a loss of their functionality, leading to survival benefits in listeriosis but not in tuberculosis.

摘要

简介

叉头框蛋白 P3(Foxp3)调节性 T 细胞对于维持自身耐受、免疫稳态和调节免疫系统至关重要。

方法

我们使用 BALB/c 背景下的小鼠模型研究了白细胞介素 4 受体 alpha(IL-4Rα)信号在()感染期间对调节性 T 细胞(Tregs)的作用,特别是在 Tregs(Foxp3IL-4Rα)中敲低 IL-4Rα。

结果

我们发现 Treg 反应受损,细菌负荷降低,肝脏和脾脏组织病理学减轻,这转化为更好的存活率。从机制上讲,我们观察到 Th1 特征的增强,表现为 T 细胞特异性转录因子 T-bet 的表达增加,以及更多产生 IFN-γ、IL-2 的效应 T 细胞,这些细胞在 Foxp3IL-4Rα 小鼠中用热灭活()刺激后产生。此外,Foxp3IL-4Rα 小鼠的 CD8 T 细胞显示出更高的细胞毒性(Granzyme-B)和更高的增殖能力(Ki-67),更好的存活(Bcl-2)和伴随的凋亡减少(激活的 caspase 3)。与()感染不同,尽管 Foxp3IL-4Rα 小鼠的 T 细胞数量和 IFN-γ、TNF 和 IL-17 产生增加,但它们在()感染期间表现出相似的细菌负荷、肺部病理学和存活率。

结论

我们的结果表明,Foxp3+调节性 T 细胞中 IL-4Rα 信号的减弱导致其功能丧失,从而在李斯特菌病中带来生存获益,但在结核病中则不然。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/59db40885c14/fimmu-15-1427055-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/43130f8de640/fimmu-15-1427055-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/ff81947a8b9e/fimmu-15-1427055-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/108021a2b46c/fimmu-15-1427055-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/2171c9c7c646/fimmu-15-1427055-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/59db40885c14/fimmu-15-1427055-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/43130f8de640/fimmu-15-1427055-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/d7533be869f5/fimmu-15-1427055-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/98fef2c2313d/fimmu-15-1427055-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/1cff3b9d3129/fimmu-15-1427055-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/ff81947a8b9e/fimmu-15-1427055-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/108021a2b46c/fimmu-15-1427055-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/2171c9c7c646/fimmu-15-1427055-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6a65/11524857/59db40885c14/fimmu-15-1427055-g009.jpg

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本文引用的文献

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IL-4 inhibits regulatory T cells differentiation by HDAC9-mediated epigenetic regulation.IL-4 通过 HDAC9 介导的表观遗传调控抑制调节性 T 细胞分化。
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IL-4Rα signaling in CD4+CD25+FoxP3+ T regulatory cells restrains airway inflammation via limiting local tissue IL-33.
白细胞介素-4 受体α信号在 CD4+CD25+FoxP3+调节性 T 细胞中通过限制局部组织白细胞介素-33 来抑制气道炎症。
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Control of Listeria monocytogenes infection requires classical IL-6 signaling in myeloid cells.控制李斯特菌感染需要髓样细胞中的经典 IL-6 信号转导。
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GM-CSF targeted immunomodulation affects host response to M. tuberculosis infection.GM-CSF 靶向免疫调节影响宿主对结核分枝杆菌感染的反应。
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