Mengfei Xue, Ruijie Yang, Guihong Li, Zhizhan Ni, Yuqing Chao, Kairui Shen, Hua Ren, Bing Du, Juliang Qin, Zhenliang Sun
Psoriasis is a chronic inflammatory skin disease characterised by inflammatory cell infiltration, keratinocyte hyperproliferation and increased neovascularization. Despite extensive research, the precise mechanisms underlying psoriasis pathology and treatment strategies remain unclear because of a complex aetiology and disease progression. Hence, in this study, we aimed to identify potential therapeutic targets for psoriasis and explore their effects on disease progression. We observed that G protein-coupled receptor LGR4 attenuates psoriasis progression. Bioinformatics analysis of publicly available clinical data revealed lower LGR4 expression in the skin lesions of patients with psoriasis than in their non-lesioned skin. Both in vitro (HaCaT cell) and in vivo (mouse) models confirmed this phenomenon. The Lgr4-knockout mouse model further confirmed that LGR4 plays a positive role in psoriasis progression. Specifically, Lgr4 knockout promoted the secretion of inflammatory factors, accumulation of local immunocyte infiltration in skin lesions, and keratinocyte proliferation. In conclusion, we demonstrated that LGR4 is critical to limiting psoriasis progression, suggesting that it is a viable target for the clinical management of this skin condition.
{"title":"LGR4 Deficiency Aggravates Skin Inflammation and Epidermal Hyperplasia in Imiquimod-Induced Psoriasis.","authors":"Mengfei Xue, Ruijie Yang, Guihong Li, Zhizhan Ni, Yuqing Chao, Kairui Shen, Hua Ren, Bing Du, Juliang Qin, Zhenliang Sun","doi":"10.1111/imm.13873","DOIUrl":"https://doi.org/10.1111/imm.13873","url":null,"abstract":"<p><p>Psoriasis is a chronic inflammatory skin disease characterised by inflammatory cell infiltration, keratinocyte hyperproliferation and increased neovascularization. Despite extensive research, the precise mechanisms underlying psoriasis pathology and treatment strategies remain unclear because of a complex aetiology and disease progression. Hence, in this study, we aimed to identify potential therapeutic targets for psoriasis and explore their effects on disease progression. We observed that G protein-coupled receptor LGR4 attenuates psoriasis progression. Bioinformatics analysis of publicly available clinical data revealed lower LGR4 expression in the skin lesions of patients with psoriasis than in their non-lesioned skin. Both in vitro (HaCaT cell) and in vivo (mouse) models confirmed this phenomenon. The Lgr4-knockout mouse model further confirmed that LGR4 plays a positive role in psoriasis progression. Specifically, Lgr4 knockout promoted the secretion of inflammatory factors, accumulation of local immunocyte infiltration in skin lesions, and keratinocyte proliferation. In conclusion, we demonstrated that LGR4 is critical to limiting psoriasis progression, suggesting that it is a viable target for the clinical management of this skin condition.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sofía Dinamarca, Cristina Croce, Anna Salvioni, Facundo Garrido, Sandra Estrada Fidalgo, Gonzalo Bigliani, Luis S Mayorga, Nicolas Blanchard, Ignacio Cebrian
Antigen cross-presentation is the process whereby small peptides derived from exogenous antigens are attached to MHC-I molecules triggering CD8+ T lymphocyte activation. The endocytic route of dendritic cells (DCs) is highly specialised for cross-presentation to initiate cytotoxic immune responses against numerous intracellular pathogens and tumours. In this study, we identify the endosomal protein sorting nexin (SNX) 17 as a key regulator of antigen internalisation and cross-presentation by DCs. SNX17 expression in DCs guarantees optimal cross-presentation of soluble, particulate, and Toxoplasma gondii-associated antigens. The silencing of SNX17 expression in DCs significantly affected the internalisation of exogenous antigens by fluid-phase endocytosis, phagocytosis, and more strikingly, T. gondii invasion. We show that SNX17 controls proper integrin recycling, actin cytoskeleton organisation, and phagosomal maturation. Altogether, our findings provide compelling evidence that SNX17 plays a central role in the modulation of the DC endocytic network, which is essential for competent antigen cross-presentation.
抗原交叉呈递是指来自外源性抗原的小肽附着在 MHC-I 分子上引发 CD8+ T 淋巴细胞活化的过程。树突状细胞(DCs)的内吞途径高度专业化,用于交叉呈递,启动针对多种细胞内病原体和肿瘤的细胞毒性免疫反应。在这项研究中,我们发现内泌体蛋白分选蛋白(SNX)17 是 DCs 抗原内化和交叉呈递的关键调节因子。SNX17在DC中的表达保证了可溶性、颗粒状和弓形虫相关抗原的最佳交叉呈递。抑制 SNX17 在直流细胞中的表达会显著影响外源抗原通过液相内吞、吞噬作用的内化,更显著的是会影响弓形虫的入侵。我们的研究表明,SNX17 控制着整合素的正常循环、肌动蛋白细胞骨架的组织以及吞噬体的成熟。总之,我们的研究结果提供了令人信服的证据,证明 SNX17 在调节 DC 内细胞网络中发挥着核心作用,而 DC 内细胞网络对有效的抗原交叉呈递至关重要。
{"title":"SNX17 Regulates Antigen Internalisation and Phagosomal Maturation by Dendritic Cells.","authors":"Sofía Dinamarca, Cristina Croce, Anna Salvioni, Facundo Garrido, Sandra Estrada Fidalgo, Gonzalo Bigliani, Luis S Mayorga, Nicolas Blanchard, Ignacio Cebrian","doi":"10.1111/imm.13878","DOIUrl":"10.1111/imm.13878","url":null,"abstract":"<p><p>Antigen cross-presentation is the process whereby small peptides derived from exogenous antigens are attached to MHC-I molecules triggering CD8+ T lymphocyte activation. The endocytic route of dendritic cells (DCs) is highly specialised for cross-presentation to initiate cytotoxic immune responses against numerous intracellular pathogens and tumours. In this study, we identify the endosomal protein sorting nexin (SNX) 17 as a key regulator of antigen internalisation and cross-presentation by DCs. SNX17 expression in DCs guarantees optimal cross-presentation of soluble, particulate, and Toxoplasma gondii-associated antigens. The silencing of SNX17 expression in DCs significantly affected the internalisation of exogenous antigens by fluid-phase endocytosis, phagocytosis, and more strikingly, T. gondii invasion. We show that SNX17 controls proper integrin recycling, actin cytoskeleton organisation, and phagosomal maturation. Altogether, our findings provide compelling evidence that SNX17 plays a central role in the modulation of the DC endocytic network, which is essential for competent antigen cross-presentation.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Itaconic acid and its metabolites have demonstrated significant therapeutic potential in various immune diseases. Originating from the tricarboxylic acid cycle in immune cells, itaconic acid can modulate immune responses, diminish inflammation, and combat oxidative stress. Recent research has uncovered multiple mechanisms through which itaconic acid exerts its effects, including the inhibition of inflammatory cytokine production, activation of anti-inflammatory pathways, and modulation of immune cell function by regulating cellular metabolism. Cellular actions are influenced by the modulation of metabolic pathways, such as inhibiting succinate dehydrogenase (SDH) activity or glycolysis, activation of nuclear-factor-E2-related factor 2 (Nrf2), boosting cellular defences against oxidative stress, and suppression of immune cell inflammation through the NF-κB pathway. This comprehensive review discusses the initiation, progression, and mechanisms of action of itaconic acid and its metabolites, highlighting their modulatory effects on various immune cell types. Additionally, it examines their involvement in immune disease like rheumatoid arthritis, multiple sclerosis, type 1 diabetes mellitus, and autoimmune hepatitis, offering greater understanding for creating new therapies for these ailments.
{"title":"Metabolic Regulation of Inflammation: Exploring the Potential Benefits of Itaconate in Autoimmune Disorders.","authors":"Yin Luo, Li-Yan Jiang, Zhe-Zhen Liao, Yuan-Yuan Wang, Ya-Di Wang, Xin-Hua Xiao","doi":"10.1111/imm.13875","DOIUrl":"https://doi.org/10.1111/imm.13875","url":null,"abstract":"<p><p>Itaconic acid and its metabolites have demonstrated significant therapeutic potential in various immune diseases. Originating from the tricarboxylic acid cycle in immune cells, itaconic acid can modulate immune responses, diminish inflammation, and combat oxidative stress. Recent research has uncovered multiple mechanisms through which itaconic acid exerts its effects, including the inhibition of inflammatory cytokine production, activation of anti-inflammatory pathways, and modulation of immune cell function by regulating cellular metabolism. Cellular actions are influenced by the modulation of metabolic pathways, such as inhibiting succinate dehydrogenase (SDH) activity or glycolysis, activation of nuclear-factor-E2-related factor 2 (Nrf2), boosting cellular defences against oxidative stress, and suppression of immune cell inflammation through the NF-κB pathway. This comprehensive review discusses the initiation, progression, and mechanisms of action of itaconic acid and its metabolites, highlighting their modulatory effects on various immune cell types. Additionally, it examines their involvement in immune disease like rheumatoid arthritis, multiple sclerosis, type 1 diabetes mellitus, and autoimmune hepatitis, offering greater understanding for creating new therapies for these ailments.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142619370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Coexistence of IL12Rβ1 and BTK Mutations in a Family.","authors":"Hulya Kose, Orhan Gorukmez, Sara Sebnem Kilic","doi":"10.1111/imm.13874","DOIUrl":"https://doi.org/10.1111/imm.13874","url":null,"abstract":"","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142545265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Durre Aden, Niti Sureka, Samreen Zaheer, Jai Kumar Chaurasia, Sufian Zaheer
Cancer is a complex and heterogeneous disease characterised by uncontrolled cell growth and proliferation. One hallmark of cancer cells is their ability to undergo metabolic reprogramming, which allows them to sustain their rapid growth and survival. This metabolic reprogramming creates an immunosuppressive microenvironment that facilitates tumour progression and evasion of the immune system. In this article, we review the mechanisms underlying metabolic reprogramming in cancer cells and discuss how these metabolic alterations contribute to the establishment of an immunosuppressive microenvironment. We also explore potential therapeutic strategies targeting metabolic vulnerabilities in cancer cells to enhance immune-mediated anti-tumour responses. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT02044861, NCT03163667, NCT04265534, NCT02071927, NCT02903914, NCT03314935, NCT03361228, NCT03048500, NCT03311308, NCT03800602, NCT04414540, NCT02771626, NCT03994744, NCT03229278, NCT04899921.
{"title":"Metabolic Reprogramming in Cancer: Implications for Immunosuppressive Microenvironment.","authors":"Durre Aden, Niti Sureka, Samreen Zaheer, Jai Kumar Chaurasia, Sufian Zaheer","doi":"10.1111/imm.13871","DOIUrl":"https://doi.org/10.1111/imm.13871","url":null,"abstract":"<p><p>Cancer is a complex and heterogeneous disease characterised by uncontrolled cell growth and proliferation. One hallmark of cancer cells is their ability to undergo metabolic reprogramming, which allows them to sustain their rapid growth and survival. This metabolic reprogramming creates an immunosuppressive microenvironment that facilitates tumour progression and evasion of the immune system. In this article, we review the mechanisms underlying metabolic reprogramming in cancer cells and discuss how these metabolic alterations contribute to the establishment of an immunosuppressive microenvironment. We also explore potential therapeutic strategies targeting metabolic vulnerabilities in cancer cells to enhance immune-mediated anti-tumour responses. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT02044861, NCT03163667, NCT04265534, NCT02071927, NCT02903914, NCT03314935, NCT03361228, NCT03048500, NCT03311308, NCT03800602, NCT04414540, NCT02771626, NCT03994744, NCT03229278, NCT04899921.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rachel Coulombeau, Claudia Selck, Nicolas Giang, Abdulrahman Al-Mohammad, Natalie Ng, Allison K Maher, Rafael Argüello, Antonio Scalfari, James Varley, Richard Nicholas, Margarita Dominguez-Villar
Inflammatory environments induce the generation of dysfunctional IFNγ+T-bet+FOXP3+ Th1-like Tregs, which show defective function and are found in autoimmune conditions including multiple sclerosis (MS). The pathways that control the generation of Th1-like Tregs are not well understood. Sphingosine-1-phosphate (S1P) signalling molecules are upregulated in Th1-like Tregs, and in vivo S1P inhibition with Fingolimod (FTY720) inhibits the expression of genes responsible for Treg plasticity in MS patients. However, the underlying mechanisms are unknown. Here we show that S1P signalling inhibition by FTY720 inhibits the generation of Th1-like Tregs and rescues their suppressive function. These effects are mediated by a decrease in mTORC1 signalling and reversal of the mitochondrial uncoupling that Tregs undergo during their reprogramming into Th1-like Tregs in vitro. Finally, these results are validated in in vivo-generated Th1-like Tregs, as Tregs from MS patients treated with FTY720 display decreased Th1-like Treg frequency, increased suppressive function and mitochondrial metabolism rebalance. These results highlight the involvement of mitochondrial uncoupling in Treg reprogramming and identify S1P signalling inhibition as a target to suppress the generation of dysfunctional Th1-like Tregs.
{"title":"Sphingosine-1-Phosphate Signalling Inhibition Suppresses Th1-Like Treg Generation by Reversing Mitochondrial Uncoupling.","authors":"Rachel Coulombeau, Claudia Selck, Nicolas Giang, Abdulrahman Al-Mohammad, Natalie Ng, Allison K Maher, Rafael Argüello, Antonio Scalfari, James Varley, Richard Nicholas, Margarita Dominguez-Villar","doi":"10.1111/imm.13870","DOIUrl":"https://doi.org/10.1111/imm.13870","url":null,"abstract":"<p><p>Inflammatory environments induce the generation of dysfunctional IFNγ<sup>+</sup>T-bet<sup>+</sup>FOXP3<sup>+</sup> Th1-like Tregs, which show defective function and are found in autoimmune conditions including multiple sclerosis (MS). The pathways that control the generation of Th1-like Tregs are not well understood. Sphingosine-1-phosphate (S1P) signalling molecules are upregulated in Th1-like Tregs, and in vivo S1P inhibition with Fingolimod (FTY720) inhibits the expression of genes responsible for Treg plasticity in MS patients. However, the underlying mechanisms are unknown. Here we show that S1P signalling inhibition by FTY720 inhibits the generation of Th1-like Tregs and rescues their suppressive function. These effects are mediated by a decrease in mTORC1 signalling and reversal of the mitochondrial uncoupling that Tregs undergo during their reprogramming into Th1-like Tregs in vitro. Finally, these results are validated in in vivo-generated Th1-like Tregs, as Tregs from MS patients treated with FTY720 display decreased Th1-like Treg frequency, increased suppressive function and mitochondrial metabolism rebalance. These results highlight the involvement of mitochondrial uncoupling in Treg reprogramming and identify S1P signalling inhibition as a target to suppress the generation of dysfunctional Th1-like Tregs.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142499557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Regulator of G-protein signalling (RGS) 10 plays critical roles in several immune related diseases. However, whether RGS10 is involved in colonic inflammation of ulcerative colitis (UC) is still obscure. This study aimed to investigate the role of RGS10 in UC. In this study, RGS10 expression was examined by quantitative real-time polymerase chain reaction (qRT-PCR), western blotting, immunohistochemistry, and immunofluorescent analysis. Single-cell RNA sequencing of intestinal mucosa was performed to identify key immune cells with differentially expressed RGS10. RGS10 knockout mice were generated and established dextran sulphate sodium (DSS)-induced colitis. Expression of inflammatory cytokines on mRNA and protein levels was detected by qRT-PCR, enzyme-linked immunosorbent assay, and flow cytometry. We found that RGS10 expression was significantly elevated in UC patients, especially in CD4+ T cells, compared with healthy subjects. Intriguingly, RGS10 deficiency markedly alleviated DSS-induced colitis and decreased the proportion of Th1 and Th17 cells in lamina propria mononuclear cells (LPMCs), peripheral blood (PB), spleens, and mesenteric lymph nodes (mLNs). Mechanistically, RGS10 deficiency blocked the differentiation of Th1 and Th17 cells by inhibiting the phosphorylation of signal transducer and activator of transcription (STAT) 1 and STAT3. The co-immunoprecipitation analysis further showed that RGS10 could interact with protein tyrosine phosphatase non-receptor type 2 (PTPN2), and further regulated Th1 and Th17 cells differentiation of CD4+ T cells. In conclusion, RGS10 deficiency alleviated intestinal mucosal inflammation through inhibition of Th1/Th17 cell-mediated immune responses via interaction with PTPN2 in CD4+ T cells. Therefore, targeting RGS10 may represent a novel therapeutic approach for UC treatment.
{"title":"RGS10 Deficiency Alleviated Intestinal Mucosal Inflammation Through Suppression of Th1/Th17 Cell Immune Responses in Ulcerative Colitis.","authors":"Yonghong Yang, Yiming Shao, Xizhuang Gao, Zongjing Hu, Yan Wang, Cuimei Ma, Guiyuan Jin, Fengqin Zhu, Guanjun Dong, Guangxi Zhou","doi":"10.1111/imm.13869","DOIUrl":"https://doi.org/10.1111/imm.13869","url":null,"abstract":"<p><p>Regulator of G-protein signalling (RGS) 10 plays critical roles in several immune related diseases. However, whether RGS10 is involved in colonic inflammation of ulcerative colitis (UC) is still obscure. This study aimed to investigate the role of RGS10 in UC. In this study, RGS10 expression was examined by quantitative real-time polymerase chain reaction (qRT-PCR), western blotting, immunohistochemistry, and immunofluorescent analysis. Single-cell RNA sequencing of intestinal mucosa was performed to identify key immune cells with differentially expressed RGS10. RGS10 knockout mice were generated and established dextran sulphate sodium (DSS)-induced colitis. Expression of inflammatory cytokines on mRNA and protein levels was detected by qRT-PCR, enzyme-linked immunosorbent assay, and flow cytometry. We found that RGS10 expression was significantly elevated in UC patients, especially in CD4<sup>+</sup> T cells, compared with healthy subjects. Intriguingly, RGS10 deficiency markedly alleviated DSS-induced colitis and decreased the proportion of Th1 and Th17 cells in lamina propria mononuclear cells (LPMCs), peripheral blood (PB), spleens, and mesenteric lymph nodes (mLNs). Mechanistically, RGS10 deficiency blocked the differentiation of Th1 and Th17 cells by inhibiting the phosphorylation of signal transducer and activator of transcription (STAT) 1 and STAT3. The co-immunoprecipitation analysis further showed that RGS10 could interact with protein tyrosine phosphatase non-receptor type 2 (PTPN2), and further regulated Th1 and Th17 cells differentiation of CD4<sup>+</sup> T cells. In conclusion, RGS10 deficiency alleviated intestinal mucosal inflammation through inhibition of Th1/Th17 cell-mediated immune responses via interaction with PTPN2 in CD4<sup>+</sup> T cells. Therefore, targeting RGS10 may represent a novel therapeutic approach for UC treatment.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142464273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dysfunctional immune regulation contributes to the pathogenesis of food allergy (FA). The mechanism behind regulatory B-cell dysfunction is unclear. CpG has immune regulatory functions. The purpose of this study is to use CpG to recover the immune suppressive functions of B cells in mice with FA. An FA mouse model was created using ovalbumin as the specific antigen. Flow cytometry was used to isolate B cells from the intestinal tissues. The immune regulatory functions of B cells were assessed using immunological approaches. The results showed that the FA response was linked to low IL-10 levels in gut lavage fluids of FA mice. FA mouse intestinal B cells produced lower amounts of IL-10 as compared with B cells isolated from naïve control mice. Impaired immune suppressive functions were observed in B cells isolated from the FA mouse intestine. The inducibility of the Il10 expression in naïve B cells of the intestine of FA mice was defective. The induction of Il10 expression in FA B cells could be restored by CpG through regulating the methylation status of the Cmip promoter. CpG promoted the therapeutic efficacy of allergen specific immunotherapy by restoring the induction of IL-10+ B cells in the intestine. The expression of Il10 in B cells of the FA mouse intestine was impaired. Administration of CpG could restore the expression of Il10 in B cells in the intestine and promote immunotherapy for FA.
免疫调节功能失调是食物过敏(FA)的发病机制之一。调节性 B 细胞功能失调的机制尚不清楚。CpG具有免疫调节功能。本研究的目的是利用 CpG 恢复 FA 小鼠 B 细胞的免疫抑制功能。以卵清蛋白为特异性抗原建立了一个 FA 小鼠模型。使用流式细胞术从肠道组织中分离出 B 细胞。使用免疫学方法评估了 B 细胞的免疫调节功能。结果显示,FA反应与FA小鼠肠道灌洗液中低IL-10水平有关。与分离自天真对照组小鼠的 B 细胞相比,FA 小鼠肠道 B 细胞产生的 IL-10 含量较低。从FA小鼠肠道分离的B细胞的免疫抑制功能受损。在FA小鼠肠道的幼稚B细胞中,Il10表达的诱导性存在缺陷。CpG可以通过调节Cmip启动子的甲基化状态来恢复FA B细胞中Il10的诱导表达。CpG通过恢复肠道中IL-10+ B细胞的诱导,促进了过敏原特异性免疫疗法的疗效。FA小鼠肠道B细胞中Il10的表达受损。服用CpG可恢复肠道B细胞中Il10的表达,促进FA的免疫治疗。
{"title":"The Immune Regulatory Functions in B Cells Are Restored by CpG to Reduce Experimental Food Allergy.","authors":"Qiao Liu, Dong-Hua Bin, Zhuo-Ya Wang, Ke-Ping Peng, Wang Tang, Jing-Weng Huang, Ling-Zhi Xu, Xiang-Yu Wang, Ping-Chang Yang, Gui-Xiang Tian","doi":"10.1111/imm.13868","DOIUrl":"https://doi.org/10.1111/imm.13868","url":null,"abstract":"<p><p>Dysfunctional immune regulation contributes to the pathogenesis of food allergy (FA). The mechanism behind regulatory B-cell dysfunction is unclear. CpG has immune regulatory functions. The purpose of this study is to use CpG to recover the immune suppressive functions of B cells in mice with FA. An FA mouse model was created using ovalbumin as the specific antigen. Flow cytometry was used to isolate B cells from the intestinal tissues. The immune regulatory functions of B cells were assessed using immunological approaches. The results showed that the FA response was linked to low IL-10 levels in gut lavage fluids of FA mice. FA mouse intestinal B cells produced lower amounts of IL-10 as compared with B cells isolated from naïve control mice. Impaired immune suppressive functions were observed in B cells isolated from the FA mouse intestine. The inducibility of the Il10 expression in naïve B cells of the intestine of FA mice was defective. The induction of Il10 expression in FA B cells could be restored by CpG through regulating the methylation status of the Cmip promoter. CpG promoted the therapeutic efficacy of allergen specific immunotherapy by restoring the induction of IL-10<sup>+</sup> B cells in the intestine. The expression of Il10 in B cells of the FA mouse intestine was impaired. Administration of CpG could restore the expression of Il10 in B cells in the intestine and promote immunotherapy for FA.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142390322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Iivo Hetemäki, T Petteri Arstila, Eliisa Kekäläinen
Transcription factor Helios, encoded by the IKZF2 gene, has an important role in regulatory T cells by stabilizing their suppressive phenotype. While Helios is prominently expressed in regulatory T cells, its expression extends beyond to include effector T cells, follicular regulatory T cells, B cells, and innate-like lymphocyte populations. Recent characterizations of patients with inborn error of immunity due to damaging IKZF2 variants coupled with translational research on lymphocytes from healthy individuals, have increased our understanding on Helios' multifaceted role in controlling the human adaptive immune system. A less studied role for Helios beyond the stabilizing of regulatory T cells has emerged in directing effector T cell maturation. In the absence of functional Helios, effector T cells acquire more inflammatory phenotype and are prone to senescence. Loss of Helios expression disrupts the regulation of the germinal centre reaction, often resulting in either hypogammaglobulinemia or B cell autoimmunity. This review summarizes findings from studies in both mice and men offering a comprehensive understanding of the impact of the transcription factor Helios on the adaptive immune system.
由 IKZF2 基因编码的转录因子 Helios 在调节性 T 细胞中发挥着重要作用,它能稳定 T 细胞的抑制表型。Helios 主要在调节性 T 细胞中表达,其表达范围还包括效应 T 细胞、滤泡调节性 T 细胞、B 细胞和先天类淋巴细胞群。最近,我们对因IKZF2变体损伤而导致先天性免疫错误的患者进行了特征描述,并对健康人的淋巴细胞进行了转化研究,从而加深了我们对Helios在控制人类适应性免疫系统中的多方面作用的了解。除了稳定调节性T细胞外,Helios在引导效应T细胞成熟方面的作用研究较少。在缺乏功能性 Helios 的情况下,效应 T 细胞会获得更多的炎症表型,并容易衰老。Helios 的表达缺失会破坏生殖中心反应的调控,通常会导致低丙种球蛋白血症或 B 细胞自身免疫。本综述总结了对小鼠和人类的研究结果,以全面了解转录因子Helios对适应性免疫系统的影响。
{"title":"Helios-Illuminating the way for lymphocyte self-control.","authors":"Iivo Hetemäki, T Petteri Arstila, Eliisa Kekäläinen","doi":"10.1111/imm.13866","DOIUrl":"https://doi.org/10.1111/imm.13866","url":null,"abstract":"<p><p>Transcription factor Helios, encoded by the IKZF2 gene, has an important role in regulatory T cells by stabilizing their suppressive phenotype. While Helios is prominently expressed in regulatory T cells, its expression extends beyond to include effector T cells, follicular regulatory T cells, B cells, and innate-like lymphocyte populations. Recent characterizations of patients with inborn error of immunity due to damaging IKZF2 variants coupled with translational research on lymphocytes from healthy individuals, have increased our understanding on Helios' multifaceted role in controlling the human adaptive immune system. A less studied role for Helios beyond the stabilizing of regulatory T cells has emerged in directing effector T cell maturation. In the absence of functional Helios, effector T cells acquire more inflammatory phenotype and are prone to senescence. Loss of Helios expression disrupts the regulation of the germinal centre reaction, often resulting in either hypogammaglobulinemia or B cell autoimmunity. This review summarizes findings from studies in both mice and men offering a comprehensive understanding of the impact of the transcription factor Helios on the adaptive immune system.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142361363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Medeea Badii, Valentin Nica, Ancuța R Straton, Brenda Kischkel, Orsolya Gaal, Georgiana Cabău, Viola Klück, Ioana Hotea, Boris Novakovic, Cristina Pamfil, Simona Rednic, Mihai G Netea, Radu A Popp, Leo A B Joosten, Tania O Crișan
Type I interferons (IFN1s) mediate innate responses to microbial stimuli and regulate interleukin (IL)-1 and IL-1 receptor antagonist (Ra) production in human cells. This study explores interferon-stimulated gene (ISG) alterations in the transcriptome of patients with gout and stimulated human primary cells in vitro in relation to serum urate concentrations. Peripheral blood mononuclear cells (PBMCs) and monocytes of patients with gout were primed in vitro with soluble urate, followed by lipopolysaccharide (LPS) stimulation. Separately, PBMCs were stimulated with various toll-like receptor (TLR) ligands. RNA sequencing and IL-1Ra cytokine measurement were performed. STAT1 phosphorylation was assessed in urate-treated monocytes. Cytokine responses to IFN-β were evaluated in PBMCs cultured with or without urate and restimulated with LPS and monosodium urate (MSU) crystals. Transcriptomics revealed suppressed IFN-related signalling pathways in urate-exposed PBMCs or monocytes which was supported by diminishment of phosphorylated STAT1. The stimulation of PBMCs with IFN-β did not modify the urate-induced inflammation. Interestingly, in vivo, serum urate concentrations were inversely correlated to in vitro ISG expression upon stimulations with TLR ligands. These findings support a deficient IFN1 signalling in the presence of elevated serum urate concentrations, which could translate to increased susceptibility to infections.
{"title":"Downregulation of type I interferon signalling pathway by urate in primary human PBMCs.","authors":"Medeea Badii, Valentin Nica, Ancuța R Straton, Brenda Kischkel, Orsolya Gaal, Georgiana Cabău, Viola Klück, Ioana Hotea, Boris Novakovic, Cristina Pamfil, Simona Rednic, Mihai G Netea, Radu A Popp, Leo A B Joosten, Tania O Crișan","doi":"10.1111/imm.13858","DOIUrl":"https://doi.org/10.1111/imm.13858","url":null,"abstract":"<p><p>Type I interferons (IFN1s) mediate innate responses to microbial stimuli and regulate interleukin (IL)-1 and IL-1 receptor antagonist (Ra) production in human cells. This study explores interferon-stimulated gene (ISG) alterations in the transcriptome of patients with gout and stimulated human primary cells in vitro in relation to serum urate concentrations. Peripheral blood mononuclear cells (PBMCs) and monocytes of patients with gout were primed in vitro with soluble urate, followed by lipopolysaccharide (LPS) stimulation. Separately, PBMCs were stimulated with various toll-like receptor (TLR) ligands. RNA sequencing and IL-1Ra cytokine measurement were performed. STAT1 phosphorylation was assessed in urate-treated monocytes. Cytokine responses to IFN-β were evaluated in PBMCs cultured with or without urate and restimulated with LPS and monosodium urate (MSU) crystals. Transcriptomics revealed suppressed IFN-related signalling pathways in urate-exposed PBMCs or monocytes which was supported by diminishment of phosphorylated STAT1. The stimulation of PBMCs with IFN-β did not modify the urate-induced inflammation. Interestingly, in vivo, serum urate concentrations were inversely correlated to in vitro ISG expression upon stimulations with TLR ligands. These findings support a deficient IFN1 signalling in the presence of elevated serum urate concentrations, which could translate to increased susceptibility to infections.</p>","PeriodicalId":13508,"journal":{"name":"Immunology","volume":" ","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142361362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}