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Depleting profibrotic macrophages using bioactivated in vivo assembly peptides ameliorates kidney fibrosis 使用生物活化的体内组装肽清除嗜纤维化巨噬细胞可改善肾脏纤维化。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-06-13 DOI: 10.1038/s41423-024-01190-6
Qing Ouyang, Chao Wang, Tian Sang, Yan Tong, Jian Zhang, Yulan Chen, Xue Wang, Lingling Wu, Xu Wang, Ran Liu, Pu Chen, Jiaona Liu, Wanjun Shen, Zhe Feng, Li Zhang, Xuefeng Sun, Guangyan Cai, Li-Li Li, Xiangmei Chen
Managing renal fibrosis is challenging owing to the complex cell signaling redundancy in diseased kidneys. Renal fibrosis involves an immune response dominated by macrophages, which activates myofibroblasts in fibrotic niches. However, macrophages exhibit high heterogeneity, hindering their potential as therapeutic cell targets. Herein, we aimed to eliminate specific macrophage subsets that drive the profibrotic immune response in the kidney both temporally and spatially. We identified the major profibrotic macrophage subset (Fn1+Spp1+Arg1+) in the kidney and then constructed a 12-mer glycopeptide that was designated as bioactivated in vivo assembly PK (BIVA-PK) to deplete these cells. BIVA-PK specifically binds to and is internalized by profibrotic macrophages. By inducing macrophage cell death, BIVA-PK reshaped the renal microenvironment and suppressed profibrotic immune responses. The robust efficacy of BIVA-PK in ameliorating renal fibrosis and preserving kidney function highlights the value of targeting macrophage subsets as a potential therapy for patients with CKD.
由于患病肾脏中存在复杂的细胞信号冗余,治疗肾脏纤维化具有挑战性。肾脏纤维化涉及以巨噬细胞为主的免疫反应,巨噬细胞会激活纤维化龛位中的肌成纤维细胞。然而,巨噬细胞表现出高度异质性,阻碍了其作为治疗细胞靶点的潜力。在此,我们旨在从时间和空间上消除驱动肾脏廓清性免疫反应的特定巨噬细胞亚群。我们确定了肾脏中主要的凋亡性巨噬细胞亚群(Fn1+Spp1+Arg1+),然后构建了一种被命名为生物活化体内组装 PK(BIVA-PK)的 12-mer糖肽来清除这些细胞。BIVA-PK 能特异性地与坏死性巨噬细胞结合并被其内化。通过诱导巨噬细胞死亡,BIVA-PK重塑了肾脏微环境并抑制了廓清性免疫反应。BIVA-PK在改善肾脏纤维化和保护肾功能方面的强大疗效凸显了以巨噬细胞亚群为靶点作为慢性肾脏病患者潜在疗法的价值。
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引用次数: 0
Chaperone- and PTM-mediated activation of IRF1 tames radiation-induced cell death and the inflammatory response 伴侣和 PTM 介导的 IRF1 激活可控制辐射诱导的细胞死亡和炎症反应。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-06-07 DOI: 10.1038/s41423-024-01185-3
Fenghao Geng, Jianhui Chen, Bin Song, Zhicheng Tang, Xiaoqian Li, Shuaijun Zhang, Tingyi Yang, Yulan Liu, Wei Mo, Yining Zhang, Chuntang Sun, Lei Tan, Wenling Tu, Daojiang Yu, Jianping Cao, Shuyu Zhang
The key role of structural cells in immune modulation has been revealed with the advent of single-cell multiomics, but the underlying mechanism remains poorly understood. Here, we revealed that the transcriptional activation of interferon regulatory factor 1 (IRF1) in response to ionizing radiation, cytotoxic chemicals and SARS-CoV-2 viral infection determines the fate of structural cells and regulates communication between structural and immune cells. Radiation-induced leakage of mtDNA initiates the nuclear translocation of IRF1, enabling it to regulate the transcription of inflammation- and cell death-related genes. Novel posttranslational modification (PTM) sites in the nuclear localization sequence (NLS) of IRF1 were identified. Functional analysis revealed that mutation of the acetylation site and the phosphorylation sites in the NLS blocked the transcriptional activation of IRF1 and reduced cell death in response to ionizing radiation. Mechanistically, reciprocal regulation between the single-stranded DNA sensors SSBP1 and IRF1, which restrains radiation-induced and STING/p300-mediated PTMs of IRF1, was revealed. In addition, genetic deletion or pharmacological inhibition of IRF1 tempered radiation-induced inflammatory cell death, and radiation mitigators also suppressed SARS-CoV-2 NSP-10-mediated activation of IRF1. Thus, we revealed a novel cytoplasm-oriented mechanism of IRF1 activation in structural cells that promotes inflammation and highlighted the potential effectiveness of IRF1 inhibitors against immune disorders.
单细胞多组学的出现揭示了结构细胞在免疫调节中的关键作用,但对其潜在机制仍知之甚少。在这里,我们揭示了干扰素调节因子1(IRF1)在电离辐射、细胞毒性化学物质和SARS-CoV-2病毒感染下的转录激活决定了结构细胞的命运,并调节结构细胞和免疫细胞之间的交流。辐射诱导的 mtDNA 泄漏启动了 IRF1 的核转位,使其能够调节炎症和细胞死亡相关基因的转录。研究人员在IRF1的核定位序列(NLS)中发现了新的翻译后修饰(PTM)位点。功能分析显示,NLS中乙酰化位点和磷酸化位点的突变阻断了IRF1的转录激活,并减少了电离辐射下的细胞死亡。从机理上讲,单链DNA传感器SSBP1和IRF1之间存在相互调控,抑制了辐射诱导和STING/p300介导的IRF1的PTMs。此外,基因缺失或药物抑制 IRF1 可抑制辐射诱导的炎症细胞死亡,辐射缓解剂也可抑制 SARS-CoV-2 NSP-10 介导的 IRF1 激活。因此,我们揭示了IRF1在结构细胞中促进炎症的一种新的面向细胞质的活化机制,并强调了IRF1抑制剂对免疫紊乱的潜在功效。
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引用次数: 0
HIF-1α and MIF enhance neutrophil-driven type 3 immunity and chondrogenesis in a murine spondyloarthritis model 在小鼠脊柱关节炎模型中,HIF-1α 和 MIF 可增强中性粒细胞驱动的 3 型免疫和软骨生成作用
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-06-05 DOI: 10.1038/s41423-024-01183-5
Akihiro Nakamura, Sungsin Jo, Sayaka Nakamura, Mansi K. Aparnathi, Shaghayegh Foroozan Boroojeni, Mariia Korshko, Ye-Soo Park, Himanshi Gupta, Sandra Vijayan, Jason S. Rockel, Mohit Kapoor, Igor Jurisica, Tae-Hwan Kim, Nigil Haroon
The hallmarks of spondyloarthritis (SpA) are type 3 immunity-driven inflammation and new bone formation (NBF). Macrophage migration inhibitory factor (MIF) was found to be a key driver of the pathogenesis of SpA by amplifying type 3 immunity, yet MIF-interacting molecules and networks remain elusive. Herein, we identified hypoxia-inducible factor-1 alpha (HIF1A) as an interacting partner molecule of MIF that drives SpA pathologies, including inflammation and NBF. HIF1A expression was increased in the joint tissues and synovial fluid of SpA patients and curdlan-injected SKG (curdlan-SKG) mice compared to the respective controls. Under hypoxic conditions in which HIF1A was stabilized, human and mouse neutrophils exhibited substantially increased expression of MIF and IL-23, an upstream type 3 immunity-related cytokine. Similar to MIF, systemic overexpression of IL-23 induced SpA pathology in SKG mice, while the injection of a HIF1A-selective inhibitor (PX-478) into curdlan-SKG mice prevented or attenuated SpA pathology, as indicated by a marked reduction in the expression of MIF and IL-23. Furthermore, genetic deletion of MIF or HIF1A inhibition with PX-478 in IL-23-overexpressing SKG mice did not induce evident arthritis or NBF, despite the presence of psoriasis-like dermatitis and blepharitis. We also found that MIF- and IL-23-expressing neutrophils infiltrated areas of the NBF in curdlan-SKG mice. These neutrophils potentially increased chondrogenesis and cell proliferation via the upregulation of STAT3 in periosteal cells and ligamental cells during endochondral ossification. Together, these results provide supporting evidence for an MIF/HIF1A regulatory network, and inhibition of HIF1A may be a novel therapeutic approach for SpA by suppressing type 3 immunity-mediated inflammation and NBF.
脊柱关节炎(Spondyloarthritis,SpA)的特征是3型免疫驱动的炎症和新骨形成(NBF)。研究发现,巨噬细胞迁移抑制因子(MIF)可通过放大3型免疫力而成为SpA发病机制的关键驱动因素,但与MIF相互作用的分子和网络仍然难以捉摸。在本文中,我们发现缺氧诱导因子-1α(HIF1A)是 MIF 的相互作用伙伴分子,它能驱动 SpA 的病理变化,包括炎症和 NBF。与对照组相比,SpA 患者和注射 curdlan 的 SKG(curdlan-SKG)小鼠的关节组织和滑液中 HIF1A 的表达均有所增加。在 HIF1A 被稳定的缺氧条件下,人和小鼠中性粒细胞的 MIF 和 IL-23(一种上游的 3 型免疫相关细胞因子)表达大幅增加。与 MIF 类似,IL-23 的系统性过表达也会诱发 SKG 小鼠的 SpA 病变,而向 curdlan-SKG 小鼠注射 HIF1A 选择性抑制剂(PX-478)则可防止或减轻 SpA 病变,这表现在 MIF 和 IL-23 的表达明显减少。此外,在 IL-23 高表达的 SKG 小鼠中遗传性缺失 MIF 或用 PX-478 抑制 HIF1A 不会诱发明显的关节炎或 NBF,尽管存在牛皮癣样皮炎和睑缘炎。我们还发现,表达 MIF- 和 IL-23 的中性粒细胞浸润了 curdlan-SKG 小鼠的 NBF 区域。在软骨内骨化过程中,这些中性粒细胞可能会通过上调骨膜细胞和韧带细胞中的 STAT3 增加软骨生成和细胞增殖。总之,这些结果为 MIF/HIF1A 调节网络提供了支持性证据,抑制 HIF1A 可抑制 3 型免疫介导的炎症和 NBF,从而成为治疗 SpA 的一种新方法。
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引用次数: 0
TL1A and IL-18 synergy promotes GM-CSF-dependent thymic granulopoiesis in mice TL1A 和 IL-18 协同作用可促进小鼠胸腺粒细胞的 GM-CSF 依赖性生成
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-06-05 DOI: 10.1038/s41423-024-01180-8
Mario Ruiz Pérez, Christian Maueröder, Wolf Steels, Bruno Verstraeten, Sahine Lameire, Wei Xie, Laura Wyckaert, Jelle Huysentruyt, Tatyana Divert, Ria Roelandt, Amanda Gonçalves, Riet De Rycke, Kodi Ravichandran, Bart N. Lambrecht, Tom Taghon, Georges Leclercq, Peter Vandenabeele, Peter Tougaard
Acute systemic inflammation critically alters the function of the immune system, often promoting myelopoiesis at the expense of lymphopoiesis. In the thymus, systemic inflammation results in acute thymic atrophy and, consequently, impaired T-lymphopoiesis. The mechanism by which systemic inflammation impacts the thymus beyond suppressing T-cell development is still unclear. Here, we describe how the synergism between TL1A and IL-18 suppresses T-lymphopoiesis to promote thymic myelopoiesis. The protein levels of these two cytokines were elevated in the thymus during viral-induced thymus atrophy infection with murine cytomegalovirus (MCMV) or pneumonia virus of mice (PVM). In vivo administration of TL1A and IL-18 induced acute thymic atrophy, while thymic neutrophils expanded. Fate mapping with Ms4a3-Cre mice demonstrated that thymic neutrophils emerge from thymic granulocyte-monocyte progenitors (GMPs), while Rag1-Cre fate mapping revealed a common developmental path with lymphocytes. These effects could be modeled ex vivo using neonatal thymic organ cultures (NTOCs), where TL1A and IL-18 synergistically enhanced neutrophil production and egress. NOTCH blockade by the LY411575 inhibitor increased the number of neutrophils in the culture, indicating that NOTCH restricted steady-state thymic granulopoiesis. To promote myelopoiesis, TL1A, and IL-18 synergistically increased GM-CSF levels in the NTOC, which was mainly produced by thymic ILC1s. In support, TL1A- and IL-18-induced granulopoiesis was completely prevented in NTOCs derived from Csf2rb-/- mice and by GM-CSFR antibody blockade, revealing that GM-CSF is the essential factor driving thymic granulopoiesis. Taken together, our findings reveal that TL1A and IL-18 synergism induce acute thymus atrophy while  promoting extramedullary thymic granulopoiesis in a NOTCH and GM-CSF-controlled manner.
急性全身性炎症会严重改变免疫系统的功能,通常会促进骨髓造血,而牺牲淋巴造血。在胸腺中,全身性炎症会导致急性胸腺萎缩,从而损害 T 淋巴细胞的生成。除了抑制 T 细胞发育外,全身性炎症影响胸腺的机制仍不清楚。在这里,我们描述了TL1A和IL-18如何协同抑制T淋巴细胞生成以促进胸腺骨髓细胞生成。在病毒诱导的胸腺萎缩感染小鼠巨细胞病毒(MCMV)或小鼠肺炎病毒(PVM)期间,胸腺中这两种细胞因子的蛋白水平升高。体内注射TL1A和IL-18会诱发急性胸腺萎缩,同时胸腺中性粒细胞会增大。用Ms4a3-Cre小鼠绘制的命运图谱显示,胸腺中性粒细胞是从胸腺粒细胞-单核细胞祖细胞(GMPs)中产生的,而Rag1-Cre命运图谱则显示了与淋巴细胞共同的发育路径。这些效应可通过新生儿胸腺器官培养物(NTOCs)进行体内外模拟,其中TL1A和IL-18协同增强了中性粒细胞的产生和排出。LY411575抑制剂阻断NOTCH可增加培养物中中性粒细胞的数量,这表明NOTCH限制了稳态胸腺粒细胞生成。为促进骨髓造血,TL1A 和 IL-18 协同提高了 NTOC 中 GM-CSF 的水平,而 GM-CSF 主要由胸腺 ILC1s 产生。此外,TL1A和IL-18诱导的粒细胞生成在Csf2rb-/-小鼠的NTOC中和GM-CSFR抗体阻断后完全被阻止,这表明GM-CSF是驱动胸腺粒细胞生成的重要因子。综上所述,我们的研究结果表明,TL1A和IL-18协同诱导急性胸腺萎缩,同时以NOTCH和GM-CSF控制的方式促进髓外胸腺造粒。
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引用次数: 0
PARP7 and nucleic acid-driven oncosuppression PARP7 和核酸驱动的抑制作用。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-06-04 DOI: 10.1038/s41423-024-01182-6
Flavie Naulin, Emma Guilbaud, Lorenzo Galluzzi
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引用次数: 0
8th Sino-German symposium on immunology: fostering mutual trust and collaborative endeavors for advancing immunological science 第八届中德免疫学研讨会:促进互信,携手推动免疫学科学发展。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-05-31 DOI: 10.1038/s41423-024-01173-7
Bo Huang, Tobias Bopp, Guideng Li
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引用次数: 0
UDPG: Maintaining the true nature of sugar UDPG: 保持糖的本色。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-05-31 DOI: 10.1038/s41423-024-01169-3
Ronghui Yang, Binghui Li
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引用次数: 0
Legacy of the discovery of the T-cell receptor: 40 years of shaping basic immunology and translational work to develop novel therapies 发现 T 细胞受体的遗产:40 年来为开发新型疗法而开展的基础免疫学和转化工作。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-05-31 DOI: 10.1038/s41423-024-01168-4
Yufang Shi, Andreas Strasser, Douglas R. Green, Eicke Latz, Alberto Mantovani, Gerry Melino
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引用次数: 0
TRIM33 plays a critical role in regulating dendritic cell differentiation and homeostasis by modulating Irf8 and Bcl2l11 transcription TRIM33 通过调节 Irf8 和 Bcl2l11 的转录,在树突状细胞分化和稳态中发挥着关键作用。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-05-31 DOI: 10.1038/s41423-024-01179-1
Xiangyi Shen, Xiaoguang Li, Tao Wu, Tingting Guo, Jiaoyan Lv, Zhimin He, Maocai Luo, Xinyi Zhu, Yujie Tian, Wenlong Lai, Chen Dong, Xiaoyu Hu, Li Wu
The development of distinct dendritic cell (DC) subsets, namely, plasmacytoid DCs (pDCs) and conventional DC subsets (cDC1s and cDC2s), is controlled by specific transcription factors. IRF8 is essential for the fate specification of cDC1s. However, how the expression of Irf8 is regulated is not fully understood. In this study, we identified TRIM33 as a critical regulator of DC differentiation and maintenance. TRIM33 deletion in Trim33fl/fl Cre-ERT2 mice significantly impaired DC differentiation from hematopoietic progenitors at different developmental stages. TRIM33 deficiency downregulated the expression of multiple genes associated with DC differentiation in these progenitors. TRIM33 promoted the transcription of Irf8 to facilitate the differentiation of cDC1s by maintaining adequate CDK9 and Ser2 phosphorylated RNA polymerase II (S2 Pol II) levels at Irf8 gene sites. Moreover, TRIM33 prevented the apoptosis of DCs and progenitors by directly suppressing the PU.1-mediated transcription of Bcl2l11, thereby maintaining DC homeostasis. Taken together, our findings identified TRIM33 as a novel and crucial regulator of DC differentiation and maintenance through the modulation of Irf8 and Bcl2l11 expression. The finding that TRIM33 functions as a critical regulator of both DC differentiation and survival provides potential benefits for devising DC-based immune interventions and therapies.
不同树突状细胞(DC)亚群,即质体 DC(pDCs)和传统 DC 亚群(cDC1s 和 cDC2s)的发育受特定转录因子的控制。IRF8对cDC1s的命运分化至关重要。然而,Irf8 的表达是如何被调控的还不完全清楚。在这项研究中,我们发现 TRIM33 是 DC 分化和维持的关键调控因子。在Trim33fl/fl Cre-ERT2小鼠中缺失TRIM33会显著影响造血祖细胞在不同发育阶段的DC分化。TRIM33的缺失下调了这些祖细胞中与DC分化相关的多个基因的表达。TRIM33 通过在 Irf8 基因位点维持足够的 CDK9 和 Ser2 磷酸化 RNA 聚合酶 II(S2 Pol II)水平,促进 Irf8 的转录,从而促进 cDC1s 的分化。此外,TRIM33 通过直接抑制 PU.1 介导的 Bcl2l11 转录,防止了 DCs 和祖细胞的凋亡,从而维持了 DC 的稳态。综上所述,我们的研究结果表明,TRIM33 是通过调节 Irf8 和 Bcl2l11 的表达来调节直流分化和维持的一种新的关键调控因子。TRIM33是直流分化和存活的关键调节因子,这一发现为设计基于直流的免疫干预和疗法提供了潜在的益处。
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引用次数: 0
Vitamin D-dependent microbiota-enhancing tumor immunotherapy 依赖维生素 D 的微生物增强肿瘤免疫疗法。
IF 21.8 1区 医学 Q1 IMMUNOLOGY Pub Date : 2024-05-31 DOI: 10.1038/s41423-024-01184-4
José M. Izquierdo
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引用次数: 0
期刊
Cellular &Molecular Immunology
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