International immunology最新文献_第2页

The role of the skin in the atopic march. 皮肤在特应性进展中的作用。

IF 4.4 4区医学

International immunology Pub Date : 2024-09-13 DOI: 10.1093/intimm/dxae053

Xin Tang,Mei Li

引用次数: 0

Regnase-1 D141N mutation induces CD4+ T cell-mediated lung granuloma formation via upregulation of Pim2. Regnase-1 D141N突变通过上调Pim2诱导CD4+ T细胞介导的肺肉芽肿形成。

IF 4.8 4区医学

International immunology Pub Date : 2024-09-10 DOI: 10.1093/intimm/dxae026

Thin Sandi Htun, Hiroki Tanaka, Shailendra Kumar Singh, Diego Diez, Shizuo Akira

{"title":"Regnase-1 D141N mutation induces CD4+ T cell-mediated lung granuloma formation via upregulation of Pim2.","authors":"Thin Sandi Htun, Hiroki Tanaka, Shailendra Kumar Singh, Diego Diez, Shizuo Akira","doi":"10.1093/intimm/dxae026","DOIUrl":"10.1093/intimm/dxae026","url":null,"abstract":"Regnase-1 is an RNase that plays a critical role in negatively regulating immune responses by destabilizing inflammatory messenger RNAs (mRNAs). Dysfunction of Regnase-1 can be a major cause of various inflammatory diseases with tissue injury and immune cell infiltration into organs. This study focuses on the role of the RNase activity of Regnase-1 in developing inflammatory diseases. We have constructed mice with a single point mutation at the catalytic center of the Regnase-1 RNase domain, which lacks endonuclease activity. D141N mutant mice demonstrated systemic inflammation, immune cell infiltration into various organs, and progressive development of lung granuloma. CD4+ T cells, mainly affected by this mutation, upregulated the mTORC1 pathway and facilitated the autoimmune trait in the D141N mutation. Moreover, serine/threonine kinase Pim2 contributed to lung inflammation in this mutation. Inhibition of Pim2 kinase activity ameliorated granulomatous inflammation, immune cell infiltration, and proliferation in the lungs. Additionally, Pim2 inhibition reduced the expression of adhesion molecules on CD4+ T cells, suggesting a role for Pim2 in facilitating leukocyte adhesion and migration to inflamed tissues. Our findings provide new insights into the role of Regnase-1 RNase activity in controlling immune functions and underscore the therapeutic relevance of targeting Pim2 to modulate abnormal immune responses.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140862153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Humoral responses are enhanced by facilitating B cell viability by Fcrl5 overexpression in B cells. B 细胞中 Fcrl5 的过表达可促进 B 细胞的活力，从而增强体液反应。

IF 4.8 4区医学

International immunology Pub Date : 2024-09-10 DOI: 10.1093/intimm/dxae028

Chisato Ono, Yuta Kochi, Yoshihiro Baba, Shinya Tanaka

引用次数: 0

Lipid metabolism: a central modulator of RORγt-mediated Th17 cell differentiation. 脂质代谢：RORt 介导的 Th17 细胞分化的核心调节器。

IF 4.8 4区医学

International immunology Pub Date : 2024-09-10 DOI: 10.1093/intimm/dxae031

Toshio Kanno, Keisuke Miyako, Yusuke Endo

{"title":"Lipid metabolism: a central modulator of RORγt-mediated Th17 cell differentiation.","authors":"Toshio Kanno, Keisuke Miyako, Yusuke Endo","doi":"10.1093/intimm/dxae031","DOIUrl":"10.1093/intimm/dxae031","url":null,"abstract":"Among the T helper cell subsets, Th17 cells contribute to the development of various inflammatory and autoimmune diseases, including psoriasis, rheumatoid arthritis, inflammatory bowel disease, steroid-resistant asthma, and multiple sclerosis. Retinoid-related orphan receptor gamma t (RORγt), a nuclear hormone receptor, serves as a master transcription factor for Th17 cell differentiation. Recent findings have shown that modulating the metabolic pathway is critical for Th17 cell differentiation, particularly through the engagement of de novo lipid biosynthesis. Suppression of lipid biosynthesis, either through the pharmacological inhibition or gene deletion of related enzymes in CD4+ T cells, results in significant impairment of Th17 cell differentiation. Mechanistic studies indicate that metabolic fluxes through both the fatty acid and cholesterol biosynthetic pathways have a pivotal role in the regulation of RORγt activity through the generation of endogenous RORγt lipid ligands. This review discusses recent discoveries highlighting the importance of lipid metabolism in Th17 cell differentiation and function, as well as exploring specific molecular pathways involved in RORγt activation through cellular lipid metabolism. We further elaborate on a pioneering therapeutic approach to improve inflammatory and autoimmune disorders via the inhibition of RORγt.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141186301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Altering the competitive environment of B cell epitopes significantly extends the duration of antibody production. 改变 B 细胞表位的竞争环境可大大延长抗体的产生时间。

IF 4.8 4区医学

International immunology Pub Date : 2024-09-10 DOI: 10.1093/intimm/dxae027

Hongke Xu, Yanfei Chen, Jingzhi Li, Mengyu Li, Miao Sun, Jian Chen, Ling Li, Qinghong Xue, Hongwei Ma

{"title":"Altering the competitive environment of B cell epitopes significantly extends the duration of antibody production.","authors":"Hongke Xu, Yanfei Chen, Jingzhi Li, Mengyu Li, Miao Sun, Jian Chen, Ling Li, Qinghong Xue, Hongwei Ma","doi":"10.1093/intimm/dxae027","DOIUrl":"10.1093/intimm/dxae027","url":null,"abstract":"Persistent immunoglobulin G (IgG) production (PIP) provides long-term vaccine protection. While variations in the duration of protection have been observed with vaccines prepared from different pathogens, little is known about the factors that determine PIP. Here, we investigated the impact of three parameters on the duration of anti-peptide IgG production, namely amino acid sequences, protein carriers, and immunization programs. We show that anti-peptide IgG production can be transformed from transient IgG production (TIP) to PIP, by placing short peptides (Pi) containing linear B cell epitopes in different competitive environments using bovine serum albumin (BSA) conjugates instead of the original viral particles. When goats were immunized with the peste des petits ruminants (PPR) live-attenuated vaccine (containing Pi as the constitutive component) and BSA-Pi conjugate, anti-Pi IgG production exhibited TIP (duration < 60 days) and PIP (duration > 368 days), respectively. Further, this PIP was unaffected by subsequent immunization with the PPR live-attenuated vaccine in the same goat. When goats were coimmunized with PPR live-attenuated vaccine and BSA-Pi, the induced anti-Pi IgG production showed a slightly extended TIP (from ~60 days to ~100 days). This discovery provides new perspectives for studying the fate of plasma cells in humoral immune responses and developing peptide vaccines related to linear neutralizing epitopes from various viruses.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140857033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Blockade of CCR5 and CXCR3 attenuates murine acute graft-versus-host disease through modulating donor-derived T-cell distribution and function. 通过调节供体源性 T 细胞的分布和功能，阻断 CCR5 和 CXCR3 可减轻小鼠急性移植物抗宿主疾病。

IF 4.8 4区医学

International immunology Pub Date : 2024-09-10 DOI: 10.1093/intimm/dxae033

Bo Tang, Chenchen Qin, Huihui Liu, Shengchao Miao, Chao Xue, Zhenhua Wang, Yang Zhang, Yujun Dong, Wei Liu, Hanyun Ren

{"title":"Blockade of CCR5 and CXCR3 attenuates murine acute graft-versus-host disease through modulating donor-derived T-cell distribution and function.","authors":"Bo Tang, Chenchen Qin, Huihui Liu, Shengchao Miao, Chao Xue, Zhenhua Wang, Yang Zhang, Yujun Dong, Wei Liu, Hanyun Ren","doi":"10.1093/intimm/dxae033","DOIUrl":"10.1093/intimm/dxae033","url":null,"abstract":"Lymphocyte trafficking via chemokine receptors such as C-C chemokine receptor 5 (CCR5) and CXCR3 plays a critical role in the pathogenesis of acute graft-versus-host disease (aGVHD). Our previous studies showed that the addition of CCR5 or CXCR3 antagonists could only slightly alleviate the development of aGVHD. Given the specificity of T lymphocytes bearing CXCR3 and CCR5, we investigated whether combined CCR5 and CXCR3 blockade could further attenuate murine aGVHD. A mouse model of aGVHD was established to assess the efficacy of CCR5 and/or CXCR3 blockade on the development of aGVHD. The distribution of lymphocytes was calculated by quantification of immunostaining cells. The immunomodulatory effect on T cells was assessed by evaluating T-cell proliferation, viability, and differentiation. Using the murine allogeneic hematopoietic stem cell transplantation model, we demonstrated that blockade of both CCR5 and CXCR3 could efficiently alleviate the development of aGVHD. Further investigation on the immune mechanisms for this prophylactic effect showed that more T cells were detained into secondary lymphoid organs (SLOs), which may lead to reduced infiltration of T cells into GVHD target organs. Our study also showed that T cells detained in SLOs dampened the activation, suppressed the polarization toward T helper type 1 (Th1) and T cytotoxic type 1 (Tc1) cells, and induced the production of Treg cells. These data suggest that concurrent blockade of CCR5 and CXCR3 attenuates murine aGVHD through modulating donor-derived T-cell distribution and function, and this might be applicable for aGVHD prophylaxis in clinical settings.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11385202/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141081220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms and Effects of Activation of Innate Immunity by Mitochondrial Nucleic Acids. 线粒体核酸激活先天性免疫的机制和影响

IF 4.8 4区医学

International immunology Pub Date : 2024-08-30 DOI: 10.1093/intimm/dxae052

Prashant Rai, Michael B Fessler

{"title":"Mechanisms and Effects of Activation of Innate Immunity by Mitochondrial Nucleic Acids.","authors":"Prashant Rai, Michael B Fessler","doi":"10.1093/intimm/dxae052","DOIUrl":"https://doi.org/10.1093/intimm/dxae052","url":null,"abstract":"In recent years, a growing number of roles have been identified for mitochondria in innate immunity. One principal mechanism is that translocation of mitochondrial nucleic acid species from the mitochondrial matrix to the cytosol and endolysosomal lumen in response to an array of microbial and non-microbial environmental stressors has been found to serve as a second messenger event in the cell signaling of the innate immune response. Thus, mitochondrial DNA and RNA have been shown to access the cytosol through several regulated mechanisms involving remodeling of the mitochondrial inner and outer membranes and to access lysosomes via vesicular transport, thereby activating cytosolic (e.g., cyclic GMP-AMP synthase [cGAS]; retinoic acid-inducible gene-I [RIG-I]-like receptors) and endolysosomal (Toll-like Receptor [TLR]7, -9) nucleic acid receptors that induce type I interferons and pro-inflammatory cytokines. In this mini-review, we discuss these molecular mechanisms of mitochondrial nucleic acid mislocalization and their roles in host defense, autoimmunity, and auto-inflammatory disorders. The emergent paradigm is one in which host-derived DNA interestingly serves as a signal amplifier in the innate immune response and also as an alarm signal for disturbances in organellar homeostasis. The apparent vast excess of mitochondria and mitochondrial DNA nucleoids per cell may thus serve to sensitize the cell response to stressors while ensuring an underlying reserve of intact mitochondria to sustain cellular metabolism. An improved understanding of these molecular mechanisms will hopefully afford future opportunities for therapeutic intervention in human disease.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142107087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Spatial diversity of in vivo tissue immunity. 体内组织免疫的空间多样性。

IF 4.8 4区医学

International immunology Pub Date : 2024-08-23 DOI: 10.1093/intimm/dxae051

Yu Miyamoto, Masaru Ishii

引用次数: 0

Identification and characterization of putative enhancer regions that direct Il6 transcription in murine macrophages. 小鼠巨噬细胞中指导 Il6 转录的推定增强子区域的鉴定和特征描述

IF 4.8 4区医学

International immunology Pub Date : 2024-08-13 DOI: 10.1093/intimm/dxae024

Norisuke Kano, Takeo Miki, Yurina Uehara, Daisuke Ori, Taro Kawai

{"title":"Identification and characterization of putative enhancer regions that direct Il6 transcription in murine macrophages.","authors":"Norisuke Kano, Takeo Miki, Yurina Uehara, Daisuke Ori, Taro Kawai","doi":"10.1093/intimm/dxae024","DOIUrl":"10.1093/intimm/dxae024","url":null,"abstract":"Interleukin-6 (IL-6) plays a crucial role in various cellular functions, including innate and adaptive immune responses. Dysregulated expression of IL-6 is associated with hyperinflammation and chronic inflammatory diseases. In this study, we aimed to identify the enhancer regions responsible for robust Il6 mRNA expression in murine macrophages. Through comprehensive genome-wide ChIP- and ATAC-seq analyses, we identified two distinct clusters, termed E1 and E2 regions, located at -144 to -163 kb relative to the Il6 transcription start site in lipopolysaccharide (LPS)-activated murine macrophages. These clusters exhibited an accumulation of histone modification marks (H3K27ac and H3K4me1), as well as open chromatin, and were found to contain binding sites for the transcription factors PU.1, NF-κB, C/EBPβ, and JunB. Upregulation of non-coding RNA (ncRNA) transcripts from the E1 and E2 regions was observed upon LPS stimulation, and repression of these ncRNAs resulted in abrogation of Il6 expression. Additionally, deletion of either E1 or E2 region significantly impaired Il6 expression, while CRISPR/dCas9 activation-mediated recruitment of the co-activator p300 to the E1 and E2 regions facilitated Il6 expression. Collectively, our findings suggest that the E1 and E2 regions serve as putative enhancers for Il6 expression.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140851224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

"A Splice of Life: The Discovery, Function, and Clinical Implications of FOXP3 Isoforms in Autoimmune Disease". "生命的剪接：FOXP3 同工酶在自身免疫性疾病中的发现、功能和临床意义"。

IF 4.8 4区医学

International immunology Pub Date : 2024-08-13 DOI: 10.1093/intimm/dxae049

Kristin N Weinstein, Phillip P Domeier, Steven F Ziegler

{"title":"\"A Splice of Life: The Discovery, Function, and Clinical Implications of FOXP3 Isoforms in Autoimmune Disease\".","authors":"Kristin N Weinstein, Phillip P Domeier, Steven F Ziegler","doi":"10.1093/intimm/dxae049","DOIUrl":"https://doi.org/10.1093/intimm/dxae049","url":null,"abstract":"Regulatory T cells (Tregs) are a specialized subset of CD4+ T cells essential for the maintenance of immune homeostasis and prevention of autoimmunity. Treg lineage and functions are programmed by the X-chromosome encoded transcription factor Forkhead box P3 (FOXP3). In humans, multiple FOXP3 isoforms are generated through alternative splicing. A full-length isoform containing all coding exons (FOXP3-FL) and a version lacking the second exon (FOXP3-ΔE2) are the predominant FOXP3 isoforms. Additionally, there are two minor isoforms lacking either exon 7 (FOXP3-ΔE7) and both exons 2 and 7 (FOXP3-ΔE2ΔE7). Although healthy humans express approximately equal levels of the FOXP3-FL and FOXP3-ΔE2 isoforms, sole expression of FOXP3-ΔE2 results in development of a systemic autoimmune disease that resembles immune dysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome. These clinical observations strongly suggest functional defects in suppression by Tregs programmed by the FOXP3-ΔE2 isoform. Work from the past two decades has provided phenotypic and functional evidence of differences between Tregs programmed by the FOXP3-FL, FOXP3-ΔE2, and FOXP3-ΔE7 isoforms. In this review, we discuss the discovery of the FOXP3 isoforms, differences in the phenotype and function of Tregs programmed by different FOXP3 isoforms, and the role that these isoforms are known to play in autoimmunity.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141971053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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