International immunology最新文献_第5页

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":" ","pages":"471-481"},"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

Identification of potential C1-binding sites in the immunoglobulin CL domains. 鉴定免疫球蛋白 CL 结构域中潜在的 C1 结合位点。

IF 4.8 4区医学

International immunology Pub Date : 2024-07-13 DOI: 10.1093/intimm/dxae017

Saeko Yanaka, Atsuji Kodama, Shigetaka Nishiguchi, Rina Fujita, Jiana Shen, Pornthip Boonsri, Duckyong Sung, Yukiko Isono, Hirokazu Yagi, Yohei Miyanoiri, Takayuki Uchihashi, Koichi Kato

{"title":"Identification of potential C1-binding sites in the immunoglobulin CL domains.","authors":"Saeko Yanaka, Atsuji Kodama, Shigetaka Nishiguchi, Rina Fujita, Jiana Shen, Pornthip Boonsri, Duckyong Sung, Yukiko Isono, Hirokazu Yagi, Yohei Miyanoiri, Takayuki Uchihashi, Koichi Kato","doi":"10.1093/intimm/dxae017","DOIUrl":"10.1093/intimm/dxae017","url":null,"abstract":"Immunoglobulin G (IgG) molecules that bind antigens on the membrane of target cells spontaneously form hexameric rings, thus recruiting C1 to initiate the complement pathway. However, our previous report indicated that a mouse IgG mutant lacking the Cγ1 domain activates the pathway independently of antigen presence through its monomeric interaction with C1q via the CL domain, as well as Fc. In this study, we investigated the potential interaction between C1q and human CL isoforms. Quantitative single-molecule observations using high-speed atomic force microscopy revealed that human Cκ exhibited comparable C1q binding capabilities with its mouse counterpart, surpassing the Cλ types, which have a higher isoelectric point than the Cκ domains. Nuclear magnetic resonance and mutation experiments indicated that the human and mouse Cκ domains share a common primary binding site for C1q, centred on Glu194, a residue conserved in the Cκ domains but absent in the Cλ domains. Additionally, the Cγ1 domain, with its high isoelectric point, can cause electrostatic repulsion to the C1q head and impede the C1q-interaction adjustability of the Cκ domain in Fab. The removal of the Cγ1 domain is considered to eliminate these factors and thus promote Cκ interaction with C1q with the potential risk of uncontrolled activation of the complement pathway in vivo in the absence of antigen. However, this research underscores the presence of potential subsites in Fab for C1q binding, offering promising targets for antibody engineering to refine therapeutic antibody design.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"405-412"},"PeriodicalIF":4.8,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11245854/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140335484","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

Immunogenicity and protective capacity of a CpG ODN adjuvanted alum adsorbed bivalent meningococcal outer membrane vesicle vaccine. CpG ODN 佐剂明矾吸附双价脑膜炎球菌外膜囊泡疫苗的免疫原性和保护能力

IF 4.8 4区医学

International immunology Pub Date : 2024-07-13 DOI: 10.1093/intimm/dxae016

Tugce Canavar Yildirim, Yasemin Ozsurekci, Muzaffer Yildirim, Irem Evcili, Volkan Yazar, Kubra Aykac, Ulku Guler, Bekir Salih, Mayda Gursel, Ihsan Gursel

{"title":"Immunogenicity and protective capacity of a CpG ODN adjuvanted alum adsorbed bivalent meningococcal outer membrane vesicle vaccine.","authors":"Tugce Canavar Yildirim, Yasemin Ozsurekci, Muzaffer Yildirim, Irem Evcili, Volkan Yazar, Kubra Aykac, Ulku Guler, Bekir Salih, Mayda Gursel, Ihsan Gursel","doi":"10.1093/intimm/dxae016","DOIUrl":"10.1093/intimm/dxae016","url":null,"abstract":"Invasive meningococcal disease (IMD) is caused by Neisseria meningitidis, with the main serogroups responsible for the disease being A, B, C, W, X, and Y. To date, several vaccines targeting N. meningitidis have been developed albeit with a short-lived protection. Given that MenW and MenB are the most common causes of IMD in Europe, Turkey, and the Middle East, we aimed to develop an outer membrane vesicle (OMV) based bivalent vaccine as the heterologous antigen source. Herein, we compared the immunogenicity, and breadth of serum bactericidal activity (SBA) assay-based protective coverage of OMV vaccine to the X serotype with existing commercial meningococcal conjugate and polysaccharide (PS) vaccines in a murine model. BALB/c mice were immunized with preclinical batches of the W + B OMV vaccine, either adjuvanted with Alum, CpG ODN, or their combinations, and compared with a MenACYW conjugate vaccine (NimenrixTM, Pfizer), and a MenB OMV-based vaccine (Bexsero®, GSK), The immune responses were assessed through enzyme-linked immunosorbent assay (ELISA) and SBA assay. Antibody responses and SBA titers were significantly higher in the W + B OMV vaccine when adjuvanted with Alum or CpG ODN, as compared to the control groups. Moreover, the SBA titers were not only significantly higher than those achieved with available conjugated ACYW vaccines but also on par with the 4CMenB vaccines. In conclusion, the W + B OMV vaccine demonstrated the capacity to elicit robust antibody responses, surpassing or matching the levels induced by licensed meningococcal vaccines. Consequently, the W + B OMV vaccine could potentially serve as a viable alternative or supplement to existing meningococcal vaccines.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"393-404"},"PeriodicalIF":4.8,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140305534","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

Recent advances regarding the potential roles of invariant natural killer T cells in cardiovascular diseases with immunological and inflammatory backgrounds. 关于不变自然杀伤 T 细胞在具有免疫和炎症背景的心血管疾病中的潜在作用的最新进展。

IF 4.8 4区医学

International immunology Pub Date : 2024-07-13 DOI: 10.1093/intimm/dxae019

Kazuya Iwabuchi, Masashi Satoh, Kazuhisa Yoshino, Naoki Ishimori

{"title":"Recent advances regarding the potential roles of invariant natural killer T cells in cardiovascular diseases with immunological and inflammatory backgrounds.","authors":"Kazuya Iwabuchi, Masashi Satoh, Kazuhisa Yoshino, Naoki Ishimori","doi":"10.1093/intimm/dxae019","DOIUrl":"10.1093/intimm/dxae019","url":null,"abstract":"Invariant natural killer T (iNKT) cells, which bear αβ-type T-cell antigen-receptors (TCRs), recognize glycolipid antigens in a cluster of differentiation 1d (CD1d)-restricted manner. Regarding these cells, the unique modes of thymic selection and maturation elucidate innateness, irrespective of them also being members of the adaptive immune system as a T-cell. iNKT cells develop and differentiate into NKT1 [interferon γ (IFN-γ)-producing], NKT2 [interleukin 4 (IL-4)/IL-13-producing], or NKT17 (IL-17-producing) subsets in the thymus. After egress, NKT10 (IL-10-producing), follicular helper NKT (NKTfh; IL-21-producing), and regulatory NKT (NKTreg) subsets emerge following stimulation in the periphery. Moreover, iNKT cells have been shown to possess several physiological or pathological roles. iNKT cells exhibit dual alleviating or aggravating roles in experimentally induced immune and/or inflammatory diseases in mice. These findings indicate that the modulation of iNKT cells can be employed for therapeutic use or prevention of human diseases. In this review, we discuss the potential roles of iNKT cells in the development of immune/inflammatory diseases of the cardiovascular system, with emphasis on atherosclerosis, aortic aneurysms, and cardiac remodeling.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"377-392"},"PeriodicalIF":4.8,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140335485","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

Correction to: Computer model of IL-6-dependent rheumatoid arthritis in F759 mice. 更正：F759 小鼠 IL-6 依赖性类风湿性关节炎的计算机模型。

IF 4.8 4区医学

International immunology Pub Date : 2024-07-13 DOI: 10.1093/intimm/dxae030

引用次数: 0

An inhibitory immunoreceptor Allergin-1 regulates the intestinal dysbiosis and barrier function in mice. 抑制性免疫受体 Allergin-1 调节小鼠肠道菌群失调和屏障功能。

IF 4.4 4区医学

International immunology Pub Date : 2024-06-08 DOI: 10.1093/intimm/dxae010

Yu-Hsien Lin, Satoko Tahara-Hanaoka, Nozomu Obana, Shinji Fukuda, Akira Shibuya

{"title":"An inhibitory immunoreceptor Allergin-1 regulates the intestinal dysbiosis and barrier function in mice.","authors":"Yu-Hsien Lin, Satoko Tahara-Hanaoka, Nozomu Obana, Shinji Fukuda, Akira Shibuya","doi":"10.1093/intimm/dxae010","DOIUrl":"10.1093/intimm/dxae010","url":null,"abstract":"The intestinal barrier consists of mucosal, epithelial, and immunological barriers and serves as a dynamic interface between the host and its environment. Disruption of the intestinal barrier integrity is a leading cause of various gastrointestinal diseases, such as inflammatory bowel disease. The homeostasis of the intestinal barrier is tightly regulated by crosstalk between gut microbes and the immune system; however, the implication of the immune system on the imbalance of gut microbes that disrupts barrier integrity remains to be fully elucidated. An inhibitory immunoglobulin-like receptor, Allergin-1, is expressed on mast cells and dendritic cells and inhibits Toll-like receptor (TLR)-2 and TLR-4 signaling in these cells. Since TLRs are major sensors of microbiota and are involved in local epithelial homeostasis, we investigated the role of Allergin-1 in maintaining intestinal homeostasis. Allergin-1-deficient (Milr1-/-) mice exhibited more severe dextran sulfate sodium (DSS)-induced colitis than did wild-type (WT) mice. Milr1-/- mice showed an enhanced intestinal permeability compared with WT mice even before DSS administration. Treatment of Milr1-/- mice with neomycin, but not ampicillin, restored intestinal barrier integrity. The 16S rRNA gene sequencing analysis demonstrated that Bifidobacterium pseudolongum was the dominant bacterium in Milr1-/- mice after treatment with ampicillin. Although the transfer of B. pseudolongum to germ-free WT mice had no effect on intestinal permeability, its transfer into ampicillin-treated WT mice enhanced intestinal permeability. These results demonstrated that Allergin-1 deficiency enhanced intestinal dysbiosis with expanded B. pseudolongum, which contributes to intestinal barrier dysfunction in collaboration with neomycin-sensitive and ampicillin-resistant microbiota.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"365-371"},"PeriodicalIF":4.4,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140039262","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

Metabolic reprogramming and macrophage polarization in granuloma formation. 肉芽肿形成过程中的代谢重编程和巨噬细胞极化

IF 4.4 4区医学

International immunology Pub Date : 2024-06-08 DOI: 10.1093/intimm/dxae013

Satoshi Nakamizo, Kenji Kabashima

{"title":"Metabolic reprogramming and macrophage polarization in granuloma formation.","authors":"Satoshi Nakamizo, Kenji Kabashima","doi":"10.1093/intimm/dxae013","DOIUrl":"10.1093/intimm/dxae013","url":null,"abstract":"This review article delves into the complexities of granuloma formation, focusing on the metabolic reprogramming within these immune structures, especially in tuberculosis and sarcoidosis. It underscores the role of the monocyte-macrophage lineage in granuloma formation and maintenance, emphasizing the adaptability of these cells to environmental cues and inflammatory stimuli. Key to the discussion is the macrophage polarization influenced by various cytokines, with a detailed exploration of the metabolic shifts towards glycolysis under hypoxic conditions and the utilization of the pentose phosphate pathway (PPP) for crucial biosynthetic processes. Significant attention is given to the metabolism of L-arginine in macrophages and its impact on immune response and granuloma function. The review also highlights the role of mechanistic target of rapamycin (mTOR) signaling in macrophage differentiation and its implications in granulomatous diseases. Discoveries such as elevated PPP activity in granuloma-associated macrophages and the protective role of NADPH against oxidative stress offer novel insights into granuloma biology. The review concludes by suggesting potential therapeutic targets within these metabolic pathways to modulate granuloma formation and function, proposing new treatment avenues for conditions characterized by chronic inflammation and granuloma formation. This work contributes significantly to the understanding of immune regulation and chronic inflammation, presenting avenues for future research and therapy in granulomatous diseases.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"329-338"},"PeriodicalIF":4.4,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140027948","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

High CD62L expression predicts the generation of chimeric antigen receptor T cells with potent effector functions. CD62L 的高表达预示着具有强大效应功能的嵌合抗原受体 T 细胞的产生。

IF 4.4 4区医学

International immunology Pub Date : 2024-06-08 DOI: 10.1093/intimm/dxae015

Hitomi Kasuya, Haosong Zhang, Yusuke Ito, Toshiaki Yoshikawa, Takahiro Nakashima, Yang Li, Tetsuya Matsukawa, Satoshi Inoue, Yuki Kagoya

{"title":"High CD62L expression predicts the generation of chimeric antigen receptor T cells with potent effector functions.","authors":"Hitomi Kasuya, Haosong Zhang, Yusuke Ito, Toshiaki Yoshikawa, Takahiro Nakashima, Yang Li, Tetsuya Matsukawa, Satoshi Inoue, Yuki Kagoya","doi":"10.1093/intimm/dxae015","DOIUrl":"10.1093/intimm/dxae015","url":null,"abstract":"The efficient generation of chimeric antigen receptor (CAR) T cells is highly influenced by the quality of apheresed T cells. Healthy donor-derived T cells usually proliferate better than patients-derived T cells and are precious resources to generate off-the-shelf CAR-T cells. However, relatively little is known about the determinants that affect the efficient generation of CAR-T cells from healthy donor-derived peripheral blood mononuclear cells (PBMCs) compared with those from the patients' own PBMCs. We here examined the efficiency of CAR-T cell generation from multiple healthy donor samples and analyzed its association with the phenotypic features of the starting peripheral blood T cells. We found that CD62L expression levels within CD8+ T cells were significantly correlated with CAR-T cell expansion. Moreover, high CD62L expression within naïve T cells was associated with the efficient expansion of T cells with a stem cell-like memory phenotype, an indicator of high-quality infusion products. Intriguingly, genetic disruption of CD62L significantly impaired CAR-T cell proliferation and cytokine production upon antigen stimulation. Conversely, ectopic expression of a shedding-resistant CD62L mutant augmented CAR-T cell effector functions compared to unmodified CAR-T cells, resulting in improved antitumor activity in vivo. Collectively, we identified the surface expression of CD62L as a concise indicator of potent T-cell proliferation. CD62L expression is also associated with the functional properties of CAR-T cells. These findings are potentially applicable to selecting optimal donors to massively generate CAR-T cell products.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"353-364"},"PeriodicalIF":4.4,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140184369","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

Acute malaria suppresses the B lymphocytic niche in the bone marrow through the alteration of CXCL12-abundant reticular cells. 急性疟疾通过改变CXCL12丰富的网状细胞来抑制骨髓中的B淋巴细胞龛。

IF 4.4 4区医学

International immunology Pub Date : 2024-06-08 DOI: 10.1093/intimm/dxae012

Michelle Sue Jann Lee, Julia Matsuo-Dapaah, Camila Del Rosario Zorrilla, Yoshiki Omatsu, Takashi Nagasawa, Shun Uemura, Atsushi Iwama, Ken J Ishii, Cevayir Coban

{"title":"Acute malaria suppresses the B lymphocytic niche in the bone marrow through the alteration of CXCL12-abundant reticular cells.","authors":"Michelle Sue Jann Lee, Julia Matsuo-Dapaah, Camila Del Rosario Zorrilla, Yoshiki Omatsu, Takashi Nagasawa, Shun Uemura, Atsushi Iwama, Ken J Ishii, Cevayir Coban","doi":"10.1093/intimm/dxae012","DOIUrl":"10.1093/intimm/dxae012","url":null,"abstract":"Bone marrow is a dynamic organ composed of stem cells that constantly receive signals from stromal cells and other hematopoietic cells in the niches of the bone marrow to maintain hematopoiesis and generate immune cells. Perturbation of the bone marrow microenvironment by infection and inflammation affects hematopoiesis and may affect immune cell development. Little is known about the effect of malaria on the bone marrow stromal cells that govern the hematopoietic stem cell (HSC) niche. In this study, we demonstrate that the mesenchymal stromal CXCL12-abundant reticular (CAR) cell population is reduced during acute malaria infection. The reduction of CXCL12 and interleukin-7 signals in the bone marrow impairs the lymphopoietic niche, leading to the depletion of common lymphoid progenitors, B cell progenitors, and mature B cells, including plasma cells in the bone marrow. We found that interferon-γ (IFNγ) is responsible for the upregulation of Sca1 on CAR cells, yet the decline in CAR cell and B cell populations in the bone marrow is IFNγ-independent. In contrast to the decline in B cell populations, HSCs and multipotent progenitors increased with the expansion of myelopoiesis and erythropoiesis, indicating a bias in the differentiation of multipotent progenitors during malaria infection. These findings suggest that malaria may affect host immunity by modulating the bone marrow niche.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"339-352"},"PeriodicalIF":4.4,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11161414/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140021661","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

Essential role of CD155 glycosylation in functional binding to DNAM-1 on natural killer cells. CD155 糖基化在与自然杀伤细胞上的 DNAM-1 功能性结合中的重要作用。

IF 4.4 4区医学

International immunology Pub Date : 2024-04-27 DOI: 10.1093/intimm/dxae005

Saeko Tahara, Genki Okumura, Tomohei Matsuo, Akira Shibuya, Kazuko Shibuya

{"title":"Essential role of CD155 glycosylation in functional binding to DNAM-1 on natural killer cells.","authors":"Saeko Tahara, Genki Okumura, Tomohei Matsuo, Akira Shibuya, Kazuko Shibuya","doi":"10.1093/intimm/dxae005","DOIUrl":"10.1093/intimm/dxae005","url":null,"abstract":"The cluster of differentiation 155 (CD155) is highly expressed on tumor cells and augments or inhibits the cytotoxic activities of natural killer (NK) cells and T cells through its receptor ligands DNAX accessory molecule 1 (DNAM-1) and T-cell immunoglobulin (Ig) and immunoreceptor tyrosine-based inhibitory motif domain (TIGIT), respectively. Although CD155 is heavily glycosylated, the role of glycosylation of CD155 in the cytotoxic activity of effector lymphocytes remains unknown. Here, we show that the N-linked glycosylation at residue 105 (N105 glycosylation) in the first Ig-like domain of CD155 is involved in the binding of CD155 to both DNAM-1 and TIGIT. The N105 glycosylation also plays an essential role to induce signaling in both DNAM-1 and TIGIT reporter cells. Moreover, we show that the N105 glycosylation of CD155 contributes preferentially to the DNAM-1-mediated activating signal over the TIGIT-mediated inhibitory signal in NK cells. Our results demonstrated the important role of the N105 glycosylation of CD155 in DNAM-1 and TIGIT functions and shed new light on the understanding of tumor immune responses.","PeriodicalId":13743,"journal":{"name":"International immunology","volume":" ","pages":"317-325"},"PeriodicalIF":4.4,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139642082","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