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Food antigens suppress small intestinal tumorigenesis 食物抗原抑制小肠肿瘤发生
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-18 DOI: 10.3389/fimmu.2024.1373766
Takaharu Sasaki, Yuna Ota, Yui Takikawa, Tommy Terrooatea, Takashi Kanaya, Masumi Takahashi, Naoko Taguchi-Atarashi, Naoko Tachibana, Haruka Yabukami, Charles D. Surh, Aki Minoda, Kwang Soon Kim, Hiroshi Ohno
Food components suppressing small intestinal tumorigenesis are not well-defined partly because of the rarity of this tumor type compared to colorectal tumors. Using Apcmin/+ mice, a mouse model for intestinal tumorigenesis, and antigen-free diet, we report here that food antigens serve this function in the small intestine. By depleting Peyer’s patches (PPs), immune inductive sites in the small intestine, we found that PPs have a role in the suppression of small intestinal tumors and are important for the induction of small intestinal T cells by food antigens. On the follicle-associated epithelium (FAE) of PPs, microfold (M) cells pass food antigens from lumen to the dendritic cells to induce T cells. Single-cell RNA-seq (scRNA-seq) analysis of immune cells in PPs revealed a significant impact of food antigens on the induction of the PP T cells and the antigen presentation capacity of dendritic cells. These data demonstrate the role of food antigens in the suppression of small intestinal tumorigenesis by PP-mediated immune cell induction.
抑制小肠肿瘤发生的食物成分尚未得到很好的界定,部分原因是与结肠直肠肿瘤相比,这种肿瘤类型很少见。我们利用Apcmin/+小鼠(一种肠道肿瘤发生的小鼠模型)和无抗原饮食,在此报告了食物抗原在小肠中的这种功能。通过消耗小肠中的免疫诱导位点佩耶氏斑块(Peyer's patches,PPs),我们发现PPs在抑制小肠肿瘤中发挥作用,并且对食物抗原诱导小肠T细胞很重要。在PPs的滤泡相关上皮(FAE)上,微褶(M)细胞将食物抗原从管腔传递到树突状细胞,从而诱导T细胞。对PP免疫细胞的单细胞RNA-seq(scRNA-seq)分析表明,食物抗原对PP T细胞的诱导和树突状细胞的抗原递呈能力有显著影响。这些数据证明了食物抗原在通过PP介导的免疫细胞诱导抑制小肠肿瘤发生中的作用。
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引用次数: 0
The iNKT cell ligand α-GalCer prevents murine septic shock by inducing IL10-producing iNKT and B cells iNKT 细胞配体 α-GalCer 通过诱导产生 IL10 的 iNKT 和 B 细胞预防小鼠脓毒性休克
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-18 DOI: 10.3389/fimmu.2024.1457690
Yun Hoo Park, Sung Won Lee, Tae-Cheol Kim, Hyun Jung Park, Luc Van Kaer, Seokmann Hong
Introductionα-galactosylceramide (α-GalCer), a prototypical agonist of invariant natural killer T (iNKT) cells, stimulates iNKT cells to produce various cytokines such as IFNγ and IL4. Moreover, repeated α-GalCer treatment can cause protective or pathogenic outcomes in various immune-mediated diseases. However, the precise role of α-GalCer-activated iNKT cells in sepsis development remains unclear. To address this issue, we employed a lipopolysaccharide (LPS)/D-galactosamine (D-GalN)-induced murine sepsis model and two alternative models.MethodsSepsis was induced in wild-type (WT) C57BL/6 (B6) mice by three methods (LPS/D-GalN, α-GalCer/D-GalN, and cecal slurry), and these mice were monitored for survival rates. WT B6 mice were intraperitoneally injected with α-GalCer or OCH (an IL4-biased α-GalCer analog) one week prior to the induction of sepsis. To investigate the effects of α-GalCer-mediated iNKT cell activation on sepsis development, immune responses were analyzed by flow cytometry using splenocytes and liver-infiltrating leukocytes. In addition, a STAT6 inhibitor (AS1517499) and an IL10 inhibitor (AS101) were employed to evaluate the involvement of IL4 or IL10 signaling. Furthermore, we performed B cell adoptive transfers to examine the contribution of α-GalCer-induced regulatory B (Breg) cell populations in sepsis protection.ResultsIn vivo α-GalCer pretreatment polarized iNKT cells towards IL4- and IL10-producing phenotypes, significantly attenuating LPS/D-GalN-induced septic lethality in WT B6 mice. Furthermore, α-GalCer pretreatment reduced the infiltration of immune cells to the liver and attenuated pro-inflammatory cytokine production. Treatment with a STAT6 inhibitor was unable to modulate disease progression, indicating that IL4 signaling did not significantly affect iNKT cell-mediated protection against sepsis. This finding was confirmed by pretreatment with OCH, which did not alter sepsis outcomes. However, interestingly, prophylactic effects of α-GalCer on sepsis were significantly suppressed by treatment with an IL10 antagonist, suggesting induction of IL10-dependent anti-inflammatory responses. In addition to IL10-producing iNKT cells, IL10-producing B cell populations were significantly increased after α-GalCer pretreatment.ConclusionOverall, our results identify α-GalCer-mediated induction of IL10 by iNKT and B cells as a promising option for controlling the pathogenesis of postoperative sepsis.
引言 α-半乳糖甘油酰胺(α-GalCer)是不变自然杀伤 T 细胞(iNKT)的典型激动剂,可刺激 iNKT 细胞产生各种细胞因子,如 IFNγ 和 IL4。此外,在各种免疫介导的疾病中,α-GalCer 的反复治疗可产生保护性或致病性结果。然而,α-GalCer 激活的 iNKT 细胞在败血症发展过程中的确切作用仍不清楚。为了解决这个问题,我们采用了脂多糖(LPS)/D-半乳糖胺(D-GalN)诱导的小鼠败血症模型和两种替代模型。方法通过三种方法(LPS/D-GalN、α-GalCer/D-GalN 和盲肠浆液)诱导野生型(WT)C57BL/6(B6)小鼠败血症,并监测这些小鼠的存活率。WT B6小鼠在败血症诱导前一周腹腔注射α-GalCer或OCH(一种IL4-biased α-GalCer类似物)。为了研究α-GalCer介导的iNKT细胞活化对败血症发展的影响,使用流式细胞术分析了脾脏细胞和肝脏浸润白细胞的免疫反应。此外,我们还使用了 STAT6 抑制剂(AS1517499)和 IL10 抑制剂(AS101)来评估 IL4 或 IL10 信号的参与情况。结果体内α-GalCer预处理将iNKT细胞极化为产生IL4和IL10的表型,显著减轻了LPS/D-GalN诱导的WT B6小鼠败血症致死率。此外,α-GalCer 预处理减少了免疫细胞对肝脏的浸润,并减轻了促炎细胞因子的产生。用STAT6抑制剂治疗也无法改变疾病的进展,这表明IL4信号传导对iNKT细胞介导的败血症保护作用没有显著影响。用 OCH 进行预处理也证实了这一发现,OCH 不会改变脓毒症的结果。然而,有趣的是,α-GalCer 对脓毒症的预防作用在用 IL10 拮抗剂处理后被显著抑制,这表明诱导了依赖 IL10 的抗炎反应。总之,我们的研究结果表明,α-GalCer 介导的 iNKT 和 B 细胞 IL10 诱导是控制术后脓毒症发病机制的一种有前途的选择。
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引用次数: 0
Unraveling the role of ADAMs in clinical heterogeneity and the immune microenvironment of hepatocellular carcinoma: insights from single-cell, spatial transcriptomics, and bulk RNA sequencing 揭示 ADAMs 在肝细胞癌临床异质性和免疫微环境中的作用:单细胞、空间转录组学和大容量 RNA 测序的启示
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1461424
Junhong Chen, Qihang Yuan, Hewen Guan, Yuying Cui, Chang Fu, Tianfu Wei, Kai Liu
BackgroundHepatocellular carcinoma (HCC) is a prevalent and heterogeneous tumor with limited treatment options and unfavorable prognosis. The crucial role of a disintegrin and metalloprotease (ADAM) gene family in the tumor microenvironment of HCC remains unclear.MethodsThis study employed a novel multi-omics integration strategy to investigate the potential roles of ADAM family signals in HCC. A series of single-cell and spatial omics algorithms were utilized to uncover the molecular characteristics of ADAM family genes within HCC. The GSVA package was utilized to compute the scores for ADAM family signals, subsequently stratified into three categories: high, medium, and low ADAM signal levels through unsupervised clustering. Furthermore, we developed and rigorously validated an innovative and robust clinical prognosis assessment model by employing 99 mainstream machine learning algorithms in conjunction with co-expression feature spectra of ADAM family genes. To validate our findings, we conducted PCR and IHC experiments to confirm differential expression patterns within the ADAM family genes.ResultsGene signals from the ADAM family were notably abundant in endothelial cells, liver cells, and monocyte macrophages. Single-cell sequencing and spatial transcriptomics analyses have both revealed the molecular heterogeneity of the ADAM gene family, further emphasizing its significant impact on the development and progression of HCC. In HCC tissues, the expression levels of ADAM9, ADAM10, ADAM15, and ADAM17 were markedly elevated. Elevated ADAM family signal scores were linked to adverse clinical outcomes and disruptions in the immune microenvironment and metabolic reprogramming. An ADAM prognosis signal, developed through the utilization of 99 machine learning algorithms, could accurately forecast the survival duration of HCC, achieving an AUC value of approximately 0.9.ConclusionsThis study represented the inaugural report on the deleterious impact and prognostic significance of ADAM family signals within the tumor microenvironment of HCC.
背景肝细胞癌(HCC)是一种常见的异质性肿瘤,治疗方案有限,预后不良。本研究采用了一种新型的多组学整合策略来研究 ADAM 家族信号在 HCC 中的潜在作用。研究采用了一系列单细胞和空间组学算法来揭示HCC中ADAM家族基因的分子特征。我们利用 GSVA 软件包计算 ADAM 家族信号的得分,然后通过无监督聚类将 ADAM 信号水平分为高、中、低三类。此外,我们还采用了 99 种主流机器学习算法,结合 ADAM 家族基因的共表达特征谱,开发并严格验证了一种创新且稳健的临床预后评估模型。为了验证我们的研究结果,我们进行了 PCR 和 IHC 实验,以确认 ADAM 家族基因的差异表达模式。单细胞测序和空间转录组学分析都揭示了 ADAM 基因家族的分子异质性,进一步强调了其对 HCC 发病和进展的重要影响。在 HCC 组织中,ADAM9、ADAM10、ADAM15 和 ADAM17 的表达水平明显升高。ADAM家族信号得分的升高与不良临床结果、免疫微环境的破坏和代谢重编程有关。这项研究首次报道了 ADAM 家族信号在 HCC 肿瘤微环境中的有害影响和预后意义。
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引用次数: 0
Exhausted signature and regulatory network of NK cells in myasthenia gravis 重症肌无力患者 NK 细胞的衰竭特征和调控网络
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1397916
Qing Zhang, Xingyu Han, Zhuajin Bi, Mengge Yang, Jing Lin, Zhijun Li, Min Zhang, Bitao Bu
IntroductionNK cells are dysfunctional in myasthenia gravis (MG), but the mechanism is unclear. This study aims to measure associations and underlying mechanisms between the NK cells and the development of MG.MethodsTwenty healthy controls (HCs) and 53 MG patients who did not receive glucocorticoids and immunosuppressants were collected. According to the Myasthenia Gravis Foundation of America (MGFA) classification, MG patients were categorized into MGFA I group (n = 18) and MGFA II-IV group (n = 35). Flow cytometry, cell sorting, ELISA, mRNA-sequencing, RT-qPCR, western blot, and cell culture experiments were performed to evaluate the regulatory mechanism of exhausted NK cells.ResultsPeripheral NK cells in MGFA II-IV patients exhibit exhausted phenotypes than HCs, marked by the dramatic loss of total NK cells, CD56dimCD16− NK cells, elevated PD1 expression, reduced NKG2D expression, impaired cytotoxic activity (perforin, granzyme B, CD107a) and cytokine secretion (IFN-γ). Plasma IL-6 and IL-21 are elevated in MG patients and mainly derived from the aberrant expansion of monocytes and Tfh cells, respectively. IL-6/IL-21 cooperatively induced NK-cell exhausted signature via upregulating SOCS2 and inhibiting the phosphorylation of STAT5. SOCS2 siRNA and IL-2 supplement attenuated the IL-6/IL-21-mediated alteration of NK-cell phenotypes and function.DiscussionInhibition of IL-6/IL-21/SOCS2/STAT5 pathway and recovery of NK-cell ability to inhibit autoimmunity may be a new direction in the treatment of MG.
引言NK细胞在重症肌无力(MG)中功能失调,但其机制尚不清楚。方法收集了20名健康对照组(HCs)和53名未接受糖皮质激素和免疫抑制剂治疗的重症肌无力患者。根据美国肌无力基金会(MGFA)的分类,MG 患者被分为 MGFA I 组(18 人)和 MGFA II-IV 组(35 人)。研究人员通过流式细胞术、细胞分选、ELISA、mRNA测序、RT-qPCR、Western印迹和细胞培养实验来评估衰竭NK细胞的调控机制。结果 MGFA II-IV 患者的外周 NK 细胞比 HCs 表现出衰竭表型,表现为总 NK 细胞、CD56dimCD16- NK 细胞急剧减少,PD1 表达升高,NKG2D 表达降低,细胞毒活性(穿孔素、颗粒酶 B、CD107a)和细胞因子分泌(IFN-γ)受损。MG患者血浆中的IL-6和IL-21升高,主要分别来自单核细胞和Tfh细胞的异常扩增。IL-6/IL-21通过上调SOCS2和抑制STAT5的磷酸化协同诱导NK细胞衰竭特征。讨论抑制IL-6/IL-21/SOCS2/STAT5通路,恢复NK细胞抑制自身免疫的能力可能是治疗MG的一个新方向。
{"title":"Exhausted signature and regulatory network of NK cells in myasthenia gravis","authors":"Qing Zhang, Xingyu Han, Zhuajin Bi, Mengge Yang, Jing Lin, Zhijun Li, Min Zhang, Bitao Bu","doi":"10.3389/fimmu.2024.1397916","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1397916","url":null,"abstract":"IntroductionNK cells are dysfunctional in myasthenia gravis (MG), but the mechanism is unclear. This study aims to measure associations and underlying mechanisms between the NK cells and the development of MG.MethodsTwenty healthy controls (HCs) and 53 MG patients who did not receive glucocorticoids and immunosuppressants were collected. According to the Myasthenia Gravis Foundation of America (MGFA) classification, MG patients were categorized into MGFA I group (n = 18) and MGFA II-IV group (n = 35). Flow cytometry, cell sorting, ELISA, mRNA-sequencing, RT-qPCR, western blot, and cell culture experiments were performed to evaluate the regulatory mechanism of exhausted NK cells.ResultsPeripheral NK cells in MGFA II-IV patients exhibit exhausted phenotypes than HCs, marked by the dramatic loss of total NK cells, CD56<jats:sup>dim</jats:sup>CD16− NK cells, elevated PD1 expression, reduced NKG2D expression, impaired cytotoxic activity (perforin, granzyme B, CD107a) and cytokine secretion (IFN-γ). Plasma IL-6 and IL-21 are elevated in MG patients and mainly derived from the aberrant expansion of monocytes and Tfh cells, respectively. IL-6/IL-21 cooperatively induced NK-cell exhausted signature via upregulating SOCS2 and inhibiting the phosphorylation of STAT5. SOCS2 siRNA and IL-2 supplement attenuated the IL-6/IL-21-mediated alteration of NK-cell phenotypes and function.DiscussionInhibition of IL-6/IL-21/SOCS2/STAT5 pathway and recovery of NK-cell ability to inhibit autoimmunity may be a new direction in the treatment of MG.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Causal relationship, shared genes between rheumatoid arthritis and pulp and periapical disease: evidence from GWAS and transcriptome data 类风湿性关节炎与牙髓和根尖周病之间的因果关系和共享基因:来自 GWAS 和转录组数据的证据
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1440753
Huili Wu, Lijuan Wang, Chenjie Qiu
ObjectivePatients with rheumatoid arthritis (RA) have an increased risk of developing pulp and periapical disease (PAP), but the causal relationship and shared genetic factors between these conditions have not been explored. This study aimed to investigate the bidirectional causal relationship between RA and PAP and to analyze shared genes and pathogenic pathways.MethodsWe utilized GWAS data from the IEU Open GWAS Project and employed five Mendelian randomization methods (MR Egger, weighted median, inverse variance weighted, simple mode, and weighted mode) to investigate the bidirectional causal relationship between RA and PAP. Transcriptome data for RA and irreversible pulpitis (IRP) were obtained from the GEO database. Hub genes were identified through differential analysis, CytoHubba, machine learning (ML), and other methods. The immune infiltration of both diseases was analyzed using the ssGSEA method. Finally, we constructed a regulatory network for miRNAs, transcription factors, chemicals, diseases, and RNA-binding proteins based on the identified hub genes.ResultsRA was significantly associated with an increased risk of PAP (OR = 1.1284, 95% CI 1.0674-1.1929, p &lt; 0.001). However, there was insufficient evidence to support the hypothesis that PAP increased the risk of RA. Integrating datasets and differential analysis identified 84 shared genes primarily involved in immune and inflammatory pathways, including the IL-17 signaling pathway, Th17 cell differentiation, and TNF signaling pathway. Using CytoHubba and three ML methods, we identified three hub genes (HLA-DRA, ITGAX, and PTPRC) that are significantly correlated and valuable for diagnosing RA and IRP. We then constructed a comprehensive regulatory network using the miRDB, miRWalk, ChipBase, hTFtarget, CTD, MalaCards, DisGeNET, and ENCORI databases.ConclusionRA may increase the risk of PAP. The three key genes, HLA-DRA, ITGAX, and PTPRC, have significant diagnostic value for both RA and IRP.
目的类风湿性关节炎(RA)患者患牙髓和根尖周病(PAP)的风险增加,但这些疾病之间的因果关系和共有遗传因素尚未得到探讨。本研究旨在研究 RA 和 PAP 之间的双向因果关系,并分析共享基因和致病途径。方法我们利用 IEU 开放 GWAS 项目的 GWAS 数据,并采用五种孟德尔随机方法(MR Egger、加权中位数、逆方差加权、简单模式和加权模式)来研究 RA 和 PAP 之间的双向因果关系。RA 和不可逆牙髓炎(IRP)的转录组数据来自 GEO 数据库。通过差异分析、CytoHubba、机器学习(ML)等方法确定了枢纽基因。使用ssGSEA方法分析了这两种疾病的免疫浸润。最后,我们根据已确定的中心基因构建了一个 miRNA、转录因子、化学物质、疾病和 RNA 结合蛋白的调控网络。RA 与 PAP 风险增加显著相关(OR = 1.1284,95% CI 1.0674-1.1929,pamp &;lt;0.001)。然而,没有足够的证据支持 PAP 会增加 RA 风险的假设。整合数据集和差异分析确定了84个主要参与免疫和炎症通路的共享基因,包括IL-17信号通路、Th17细胞分化和TNF信号通路。利用 CytoHubba 和三种 ML 方法,我们确定了三个枢纽基因(HLA-DRA、ITGAX 和 PTPRC),它们具有显著的相关性,对诊断 RA 和 IRP 很有价值。然后,我们利用 miRDB、miRWalk、ChipBase、hTFtarget、CTD、MalaCards、DisGeNET 和 ENCORI 数据库构建了一个全面的调控网络。HLA-DRA、ITGAX 和 PTPRC 这三个关键基因对 RA 和 IRP 都有重要的诊断价值。
{"title":"Causal relationship, shared genes between rheumatoid arthritis and pulp and periapical disease: evidence from GWAS and transcriptome data","authors":"Huili Wu, Lijuan Wang, Chenjie Qiu","doi":"10.3389/fimmu.2024.1440753","DOIUrl":"https://doi.org/10.3389/fimmu.2024.1440753","url":null,"abstract":"ObjectivePatients with rheumatoid arthritis (RA) have an increased risk of developing pulp and periapical disease (PAP), but the causal relationship and shared genetic factors between these conditions have not been explored. This study aimed to investigate the bidirectional causal relationship between RA and PAP and to analyze shared genes and pathogenic pathways.MethodsWe utilized GWAS data from the IEU Open GWAS Project and employed five Mendelian randomization methods (MR Egger, weighted median, inverse variance weighted, simple mode, and weighted mode) to investigate the bidirectional causal relationship between RA and PAP. Transcriptome data for RA and irreversible pulpitis (IRP) were obtained from the GEO database. Hub genes were identified through differential analysis, CytoHubba, machine learning (ML), and other methods. The immune infiltration of both diseases was analyzed using the ssGSEA method. Finally, we constructed a regulatory network for miRNAs, transcription factors, chemicals, diseases, and RNA-binding proteins based on the identified hub genes.ResultsRA was significantly associated with an increased risk of PAP (OR = 1.1284, 95% CI 1.0674-1.1929, p &amp;lt; 0.001). However, there was insufficient evidence to support the hypothesis that PAP increased the risk of RA. Integrating datasets and differential analysis identified 84 shared genes primarily involved in immune and inflammatory pathways, including the IL-17 signaling pathway, Th17 cell differentiation, and TNF signaling pathway. Using CytoHubba and three ML methods, we identified three hub genes (HLA-DRA, ITGAX, and PTPRC) that are significantly correlated and valuable for diagnosing RA and IRP. We then constructed a comprehensive regulatory network using the miRDB, miRWalk, ChipBase, hTFtarget, CTD, MalaCards, DisGeNET, and ENCORI databases.ConclusionRA may increase the risk of PAP. The three key genes, HLA-DRA, ITGAX, and PTPRC, have significant diagnostic value for both RA and IRP.","PeriodicalId":12622,"journal":{"name":"Frontiers in Immunology","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neutrophil-fibroblast crosstalk drives immunofibrosis in Crohn’s disease through IFNα pathway 中性粒细胞-成纤维细胞串联通过 IFNα 通路驱动克罗恩病的免疫纤维化
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1447608
Efstratios Gavriilidis, Georgios Divolis, Anastasia-Maria Natsi, Nikolaos Kafalis, Dionysios Kogias, Christina Antoniadou, Evgenia Synolaki, Evgenios Pavlos, Marianna A. Koutsi, Stylianos Didaskalou, Evangelos Papadimitriou, Victoria Tsironidou, Ariana Gavriil, Vasileios Papadopoulos, Marios Agelopoulos, Dimitrios Tsilingiris, Maria Koffa, Alexandra Giatromanolaki, Georgios Kouklakis, Konstantinos Ritis, Panagiotis Skendros
IntroductionCrohn’s disease (CD) is characterized by chronic inflammation and intestinal fibrosis leading to lifelong complications. However, the disease pathogenesis remains elusive, and the therapeutic options are limited. Here, we investigated the interaction between neutrophils and intestinal fibroblasts in the development of CD immunofibrosis, a disease mechanism predisposing to inflammatory and fibrotic complications.MethodsPeripheral neutrophils, enriched neutrophil extracellular traps (eNETs), serum, primary intestinal fibroblasts (PIFs) and intestinal biopsies from CD, ulcerative colitis (UC) patients, and healthy individuals (HI), were studied. Transcriptome analysis of neutrophils, multi-cytokine profiling and cell-based functional assays at mRNA/protein level were performed.ResultsCompared to UC, PIFs from CD patients, independently to the presence of strictures, displayed a distinct pro-fibrotic phenotype characterized by negative Krüppellike Factor-2 (KLF2) and increased cellular communication network factor-2 (CCN2) expression leading to collagen production. In both UC and CD, PIFs-derived IL-8 acted as a culprit chemoattractant for neutrophils in the intestine, where CD neutrophils were accumulated close to fibrotic lesions. Functionally, only CD neutrophils via eNETs induced a CD-like phenotype in HI PIFs, suggesting their fibrotic plasticity. High IFNa in serum and IFΝ-responsive signature in peripheral neutrophils were observed in CD, distinguishing it from UC. Moreover, CD serum stimulated the release of fibrogenic eNETs from neutrophils in an IFNa-dependent manner, suggesting the priming role of IFNa in circulating neutrophils. Inhibition of eNETs or JAK signaling in neutrophils or PIFs prevented the neutrophil-mediated fibrotic effect on PIFs. Furthermore, both serum IFNa levels and mRNA levels of key IFN signaling components in neutrophils were wellcorrelated with CD severity.ConclusionsThis study reveals the important role of the IFNa/neutrophil/fibroblast axis in CD immunofibrosis, suggesting candidate biomarkers and putative therapeutic targets.
导言克罗恩病(CD)的特点是慢性炎症和肠纤维化,会导致终身并发症。然而,该病的发病机制仍然难以捉摸,治疗方案也很有限。方法研究了CD、溃疡性结肠炎(UC)患者和健康人(HI)的外周中性粒细胞、富集的中性粒细胞胞外捕获物(eNETs)、血清、原发性肠成纤维细胞(PIFs)和肠活检组织。结果与 UC 相比,CD 患者的 PIFs 因存在狭窄而表现出明显的促纤维化表型,其特征是 Krüppellike Factor-2 (KLF2) 阴性和细胞通讯网络因子-2 (CCN2) 表达增加,导致胶原蛋白生成。在 UC 和 CD 中,PIFs 衍生的 IL-8 是肠道中性粒细胞的主要趋化吸引因子,其中 CD 中性粒细胞在纤维化病灶附近聚集。从功能上看,只有CD中性粒细胞通过eNETs诱导HI PIFs出现CD样表型,这表明它们具有纤维化可塑性。在 CD 中观察到血清中的高 IFNa 和外周中性粒细胞中的 IFΝ 反应特征,从而将其与 UC 区分开来。此外,CD血清以IFNa依赖性方式刺激中性粒细胞释放纤维化eNETs,这表明IFNa在循环中性粒细胞中起着引物作用。抑制中性粒细胞或 PIF 中的 eNETs 或 JAK 信号转导可阻止中性粒细胞介导的对 PIF 的纤维化作用。结论这项研究揭示了 IFNa/中性粒细胞/成纤维细胞轴在 CD 免疫性纤维化中的重要作用,提出了候选生物标记物和治疗靶点。
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引用次数: 0
Dissecting the causal links between gut microbiome, immune traits and polyp using genetic evidence 利用遗传证据剖析肠道微生物组、免疫特征和息肉之间的因果联系
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1431990
Cheng Zhou, Xiaofeng Ye, Zhinuo Liu, Tong Liu, Shanzheng Li, Jinqiu Yang, Jingjing Wei, Peng Yu, Ran Jia, Wenxia Zhao
BackgroundPrevious research has demonstrated an association between gut microbiota and immune status with the development of several diseases. However, whether these factors contribute to polyps remains unclear. This study aims to use Mendelian randomization (MR) to investigate the causal relationship between gut microbiota and 4 types of polyps (nasal, gallbladder, colon, and gastric polyps), as well as to analyze the mediating role of immune traits.MethodsThis study utilized large-scale GWAS meta-analyses of gut microbiota (MiBioGen Consortium), 731 immune traits, and 4 types of polyps (one from the FinnGen Consortium and three from the NBDC Human Database). Univariate MR with the inverse variance weighted (IVW) estimation method was employed as the primary analytical approach. A two-step MR analysis was performed to identify potential mediating immune traits. Additionally, multivariable MR approach based on Bayesian model averaging (MR-BMA) was employed to further prioritize gut microbiota and immune traits associated with polyp development.ResultsBased on IVW method in univariate MR analysis, we identified 39 gut microbial taxa and 135 immune traits significantly causally associated with at least one type of polyp. For nasal polyps, 13 microbial taxa and 61 immune traits were causally associated. After false discovery rate (FDR) correction, CD3 on Central Memory CD8+ T cells and CD3 on CD4 regulatory T cells remained significant. MR-BMA identified 4 gut microbial taxa and 4 immune traits as high priority. For gallbladder polyps, 9 microbial taxa and 30 immune traits were causally associated. MR-BMA identified 8 microbial taxa and 6 immune traits as higher importance. For colon polyps, 6 microbial taxa and 21 immune traits were causally associated. MR-BMA identified 4 microbial taxa and 3 immune traits as higher importance. For gastric polyps, 12 microbial taxa and 33 immune traits were causally associated. Actinobacteria remained significant after FDR correction, and MR-BMA identified 7 gut microbial taxa and 6 immune traits as high priority. We identified 16 causal pathways with mediator directions consistent with the direction of gut microbiome-polyp association. Of these, 6 pathways were associated with the mechanism of nasal polyps, 1 with gallbladder polyps, 2 with colon polyps, and 7 with gastric polyps.ConclusionsOur findings shed light on the causal relationships between gut microbiota, immune traits, and polyp development, underscoring the crucial roles of gut microbiota and immune status in polypogenesis. Furthermore, these findings suggest potential applications in polyp prevention, early screening, and the development of effective strategies to reduce polyp risk.
背景以前的研究表明,肠道微生物群和免疫状态与多种疾病的发生有关。然而,这些因素是否会导致息肉仍不清楚。本研究旨在利用孟德尔随机化方法(MR)研究肠道微生物群与 4 种息肉(鼻息肉、胆囊息肉、结肠息肉和胃息肉)之间的因果关系,并分析免疫特征的中介作用。方法本研究利用大规模 GWAS 元分析对肠道微生物群(MiBioGen Consortium)、731 个免疫特征和 4 种息肉(一种来自 FinnGen Consortium,三种来自 NBDC 人类数据库)进行了分析。主要分析方法是采用反方差加权(IVW)估计法进行单变量磁共振分析。进行了两步磁共振分析,以确定潜在的介导免疫特征。结果根据单变量 MR 分析中的 IVW 方法,我们确定了 39 个肠道微生物类群和 135 个免疫特征与至少一种类型的息肉有显著的因果关系。就鼻息肉而言,13 个微生物类群和 61 个免疫特征与鼻息肉有因果关系。经误诊率(FDR)校正后,中央记忆 CD8+ T 细胞上的 CD3 和 CD4 调节性 T 细胞上的 CD3 仍具有显著性。MR-BMA确定了4个肠道微生物类群和4个免疫特征为高优先级。就胆囊息肉而言,9 个微生物类群和 30 个免疫特质存在因果关系。MR-BMA 确定了 8 个微生物类群和 6 个免疫特征具有较高的重要性。就结肠息肉而言,6 个微生物类群和 21 个免疫特征存在因果关系。MR-BMA 确定了 4 个微生物类群和 3 个免疫性状的重要性更高。在胃息肉中,12 个微生物类群和 33 个免疫特征存在因果关系。放线菌在经过 FDR 校正后仍具有显著性,MR-BMA 确定了 7 个肠道微生物类群和 6 个免疫特征具有较高的重要性。我们确定了 16 条因果关系通路,其中介方向与肠道微生物群-多聚物的关联方向一致。结论我们的发现揭示了肠道微生物群、免疫特征和息肉发生之间的因果关系,强调了肠道微生物群和免疫状态在息肉发生中的关键作用。此外,这些研究结果表明了在息肉预防、早期筛查和制定降低息肉风险的有效策略方面的潜在应用。
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引用次数: 0
African swine fever virus MGF360-4L protein attenuates type I interferon response by suppressing the phosphorylation of IRF3 非洲猪瘟病毒 MGF360-4L 蛋白通过抑制 IRF3 的磷酸化来减弱 I 型干扰素反应
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1382675
Zhen Wang, Yuheng He, Ying Huang, Wenzhu Zhai, Chunhao Tao, Yuanyuan Chu, Zhongbao Pang, Hongfei Zhu, Peng Zhao, Hong Jia
African swine fever (ASF) is a highly contagious and lethal disease of swine caused by African swine fever virus (ASFV), and the mortality rate caused by virulent stains can approach 100%. Many ASFV viral proteins suppress the interferon production to evade the host’s innate immune responses. However, whether ASFV MGF360-4L could inhibit type I interferon (IFN-I) signaling pathway and the underlying molecular mechanisms remain unknown. Our study, indicated that ASFV MGF360-4L could negatively regulates the cGAS-STING mediated IFN-I signaling pathway. Overexpressing ASFV MGF360-4L could inhibit the cGAS/STING signaling pathway by inhibiting the interferon-β promoter activity, which was induced by cGAS/STING, TBK1, and IRF3-5D, and further reduced the transcriptional levels of ISG15, ISG54, ISG56, STAT1, STAT2, and TYK2. Confocal microscopy and immunoprecipitation revealed that MGF360-4L co-localized and interacted with IRF3, and WB revealed that ASFV MGF360-4L suppressed the phosphorylation of IRF3. 4L-F2 (75-162 aa) and 4L-F3 (146-387 aa) were the crucial immunosuppressive domains and sites. Altogether, our study reveals ASFV MGF360-4L inhibited cGAS‐STING mediated IFN-I signaling pathways, which provides insights into an evasion strategy of ASFV involving in host’s innate immune responses.
非洲猪瘟(ASF)是由非洲猪瘟病毒(ASFV)引起的猪的一种高度传染性和致死性疾病,毒性染色引起的死亡率可接近 100%。许多 ASFV 病毒蛋白会抑制干扰素的产生,以逃避宿主的先天性免疫反应。然而,ASFV MGF360-4L 是否能抑制 I 型干扰素(IFN-I)信号通路及其分子机制尚不清楚。我们的研究表明,ASFV MGF360-4L 可负向调节 cGAS-STING 介导的 IFN-I 信号通路。过表达 ASFV MGF360-4L 可通过抑制 cGAS/STING、TBK1 和 IRF3-5D 诱导的干扰素-β 启动子活性来抑制 cGAS/STING 信号通路,并进一步降低 ISG15、ISG54、ISG56、STAT1、STAT2 和 TYK2 的转录水平。共聚焦显微镜和免疫沉淀显示 MGF360-4L 与 IRF3 共定位并相互作用,WB 显示 ASFV MGF360-4L 抑制了 IRF3 的磷酸化。4L-F2(75-162 aa)和4L-F3(146-387 aa)是关键的免疫抑制结构域和位点。总之,我们的研究揭示了 ASFV MGF360-4L 对 cGAS-STING 介导的 IFN-I 信号通路的抑制作用,从而揭示了 ASFV 参与宿主先天免疫应答的一种规避策略。
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引用次数: 0
Cutting edge of immune response and immunosuppressants in allogeneic and xenogeneic islet transplantation 异体和异种胰岛移植中免疫反应和免疫抑制剂的前沿技术
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1455691
Liting Yue, Jisong Li, Mingjun Yao, Siyuan Song, Xiaoqin Zhang, Yi Wang
As an effective treatment for diabetes, islet transplantation has garnered significant attention and research in recent years. However, immune rejection and the toxicity of immunosuppressive drugs remain critical factors influencing the success of islet transplantation. While immunosuppressants are essential in reducing immune rejection reactions and can significantly improve the survival rate of islet transplants, improper use of these drugs can markedly increase mortality rates following transplantation. Additionally, the current availability of islet organ donations fails to meet the demand for organ transplants, making xenotransplantation a crucial method for addressing organ shortages. This review will cover the following three aspects: 1) the immune responses occurring during allogeneic islet transplantation, including three stages: inflammation and IBMIR, allogeneic immune response, and autoimmune recurrence; 2) commonly used immunosuppressants in allogeneic islet transplantation, including calcineurin inhibitors (Cyclosporine A, Tacrolimus), mycophenolate mofetil, glucocorticoids, and Bortezomib; and 3) early and late immune responses in xenogeneic islet transplantation and the immune effects of triple therapy (ECDI-fixed donor spleen cells (ECDI-SP) + anti-CD20 + Sirolimus) on xenotransplantation.
作为治疗糖尿病的一种有效方法,胰岛移植近年来引起了广泛关注和研究。然而,免疫排斥反应和免疫抑制剂的毒性仍然是影响胰岛移植成功与否的关键因素。虽然免疫抑制剂对减少免疫排斥反应至关重要,并能显著提高胰岛移植的存活率,但这些药物的不当使用会明显增加移植后的死亡率。此外,目前的胰岛器官捐献无法满足器官移植的需求,因此异种移植成为解决器官短缺的重要方法。本综述将涵盖以下三个方面:1) 同种异体胰岛移植过程中发生的免疫反应,包括三个阶段:炎症和 IBMIR、同种异体胰岛移植过程中发生的免疫反应:炎症和 IBMIR、异体免疫反应和自身免疫复发;2)异体胰岛移植中常用的免疫抑制剂,包括钙神经蛋白抑制剂(环孢素 A、他克莫司)、霉酚酸酯、糖皮质激素和硼替佐米;3)异种胰岛移植的早期和晚期免疫反应,以及三联疗法(ECDI-固定供体脾细胞(ECDI-SP)+抗CD20+西罗莫司)对异种移植的免疫效应。
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引用次数: 0
(Nano)biotechnological approaches in the treatment of cervical cancer: integration of engineering and biology (治疗宫颈癌的(纳米)生物技术方法:工程学与生物学的结合
IF 7.3 2区 医学 Q1 IMMUNOLOGY Pub Date : 2024-09-13 DOI: 10.3389/fimmu.2024.1461894
Weimin Xie, Zhengmei Xu
Cervical cancer is one of the most malignant gynaecological tumors characterised with the aggressive behaviour of the tumor cells. In spite of the development of different strategies for the treatment of cervical cancer, the tumor cells have developed resistance to conventional therapeutics. On the other hand, nanoparticles have been recently applied for the treatment of human cancers through delivery of drugs and facilitate tumor suppression. The stimuli-sensitive nanostructures can improve the release of therapeutics at the tumor site. In the present review, the nanostructures for the treatment of cervical cancer are discussed. Nanostructures can deliver both chemotherapy drugs and natural compounds to increase anti-cancer activity and prevent drug resistance in cervical tumor. Moreover, the genetic tools such as siRNA can be delivered by nanoparticles to enhance their accumulation at tumor site. In order to enhance selectivity, the stimuli-responsive nanoparticles such as pH- and redox-responsive nanocarriers have been developed to suppress cervical tumor. Moreover, nanoparticles can induce photo-thermal and photodynamic therapy to accelerate cell death in cervical tumor. In addition, nanobiotechnology demonstrates tremendous potential in the treatment of cervical cancer, especially in the context of tumor immunotherapy. Overall, metal-, carbon-, lipid- and polymer-based nanostructures have been utilized in cervical cancer therapy. Finally, hydrogels have been developed as novel kinds of carriers to encapsulate therapeutics and improve anti-cancer activity.
宫颈癌是最恶性的妇科肿瘤之一,其特点是肿瘤细胞具有侵袭性。尽管开发了不同的宫颈癌治疗策略,但肿瘤细胞对传统疗法产生了抗药性。另一方面,纳米粒子最近被应用于人类癌症的治疗,通过输送药物,促进肿瘤抑制。对刺激敏感的纳米结构可改善治疗药物在肿瘤部位的释放。本综述讨论了用于治疗宫颈癌的纳米结构。纳米结构既能递送化疗药物,也能递送天然化合物,从而提高抗癌活性,防止宫颈肿瘤产生耐药性。此外,纳米颗粒还可以递送 siRNA 等基因工具,以增强其在肿瘤部位的积累。为了提高选择性,人们开发了刺激响应型纳米粒子,如 pH 和氧化还原响应型纳米载体,以抑制宫颈肿瘤。此外,纳米粒子还能诱导光热和光动力疗法,加速宫颈肿瘤细胞的死亡。此外,纳米生物技术在治疗宫颈癌,尤其是在肿瘤免疫疗法方面具有巨大潜力。总体而言,以金属、碳、脂质和聚合物为基础的纳米结构已被用于宫颈癌治疗。最后,水凝胶已被开发为新型载体,可封装治疗药物并提高抗癌活性。
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引用次数: 0
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