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Canziani KE, Ruiz MC, Candia MR, Ilid M, Feregotti E, Curciarello R, Álvarez MC, Guzmán L, Bernedo V, García M, Bohle B, Docena GH, Muglia CI. Food-sensitized pediatric patients show colonic cow's milk protein-specific Th2 cells. J Leukoc Biol 2023; 114:434-442. [PMID: 37478370 DOI: 10.1093/jleuko/qiad083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 06/21/2023] [Accepted: 07/07/2023] [Indexed: 07/23/2023] Open
Abstract
Food allergies have become a health concern worldwide. Around 6% to 10% of children are allergic to cow's milk proteins. We have previously characterized colorectal polyps in patients sensitized to food allergens. These polyps are classified as inflammatory and present a type 2 environment, with elevated interleukin (IL)-13 and IL-4, and are a site of immunoglobulin E synthesis. In this study, we characterized and isolated cow's milk protein-specific T cell lines and T cell clones from the lamina propria of polyps from patients sensitized to these proteins. Isolated T cells responded to cow's milk proteins similarly to peripheral blood T cells, showing antigen-specific cell proliferation and Th2 cytokines release in vitro. T cell clones obtained were all CD4+ T cells and expressed the membrane TCRαβ receptor and secreted higher IL-4, IL-5, and IL-13 amounts than unstimulated cells, whereas interferon γ secretion remained unchanged. Remarkably, the gut homing chemokine receptor CCR9 was augmented in cow's milk-specific peripheral and lamina propria T cells, and CCL25 was found to be expressed in the inflammatory polyp tissue and not in the adjacent mucosa. In conclusion, we isolated and characterized cow's milk-specific lamina propria CD4+ Th2 cells from colonic inflammatory polyps. CCR9 expression on these cells, along with increase secretion of CCL25 in the polyp, favors recruitment and cow's milk-specific allergic response within the inflammatory polyp tissue. Our findings may be critical to understand the underlying mechanism that promotes immunoglobulin E synthesis in the colon of cow's milk proteins allergic patients, contributing to the development of novel T cell-targeted immunotherapies.
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Affiliation(s)
- Karina E Canziani
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - María Carolina Ruiz
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - Martín R Candia
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - Manuela Ilid
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - Emanuel Feregotti
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - Renata Curciarello
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - María Cecilia Álvarez
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - Luciana Guzmán
- Servicio de Gastroenterología, Hospital de Niños Sor María Ludovica, La Plata, Calle 14 N°1631, 1900, La Plata, Argentina
| | - Viviana Bernedo
- Servicio de Gastroenterología, Hospital de Niños Sor María Ludovica, La Plata, Calle 14 N°1631, 1900, La Plata, Argentina
| | - Marcela García
- Sala de Alergia, Hospital de Niños Sor María Ludovica, Calle 14 N°1631, 1900, La Plata, Argentina
| | - Barbara Bohle
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Guillermo Horacio Docena
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
| | - Cecilia Isabel Muglia
- Instituto de Estudios Inmunológicos y Fisiopatológicos, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, asociado Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Boulevard 120 N°1489, 1900, La Plata, Argentina
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Gusakova MS, Ivanov MV, Kashtanova DA, Taraskina AN, Erema VV, Mikova VM, Loshkarev RI, Ignatyeva OA, Akinshina AI, Mitrofanov SI, Snigir EA, Yudin VS, Makarov VV, Keskinov AA, Yudin SM. GWAS reveals genetic basis of a predisposition to severe COVID-19 through in silico modeling of the FYCO1 protein. Front Med (Lausanne) 2023; 10:1178939. [PMID: 37547597 PMCID: PMC10399629 DOI: 10.3389/fmed.2023.1178939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 07/03/2023] [Indexed: 08/08/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of COVID-19, is heavily reliant on its natural ability to "hack" the host's genetic and biological pathways. The genetic susceptibility of the host is a key factor underlying the severity of the disease. Polygenic risk scores are essential for risk assessment, risk stratification, and the prevention of adverse outcomes. In this study, we aimed to assess and analyze the genetic predisposition to severe COVID-19 in a large representative sample of the Russian population as well as to build a reliable but simple polygenic risk score model with a lower margin of error. Another important goal was to learn more about the pathogenesis of severe COVID-19. We examined the tertiary structure of the FYCO1 protein, the only gene with mutations in its coding region and discovered changes in the coiled-coil domain. Our findings suggest that FYCO1 may accelerate viral intracellular replication and excessive exocytosis and may contribute to an increased risk of severe COVID-19. We found significant associations between COVID-19 and LZTFL1, FYCO1, XCR1, CCR9, TMLHE-AS1, and SCYL2 at 3p21.31. Our findings further demonstrate the polymorphic nature of the severe COVID-19 phenotype.
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Affiliation(s)
| | | | - Daria A. Kashtanova
- Federal State Budgetary Institution Centre for Strategic Planning and Management of Biomedical Health Risks of the Federal Medical Biological Agency, Moscow, Russia
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Choi SM, Park HJ, Choi EA, Jung KC, Lee JI. Heterogeneity of circulating CD4 +CD8 + double-positive T cells characterized by scRNA-seq analysis and trajectory inference. Sci Rep 2022; 12:14111. [PMID: 35982155 PMCID: PMC9388645 DOI: 10.1038/s41598-022-18340-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022] Open
Abstract
The frequency of CD4+CD8+ double-positive (DP) T cells is highly associated with a variety of diseases. Recently, we used high-throughput single-cell RNA sequencing to show that circulating DP T cells in cynomolgus monkeys comprise nine heterogeneous populations. To better understand the characteristics of DP T cells, we analyzed 7601 cells from a rhesus monkey and detected 14,459 genes. Rhesus monkey DP T cells comprised heterogeneous populations (naïve, Treg-, Tfh-, CCR9+ Th-, Th17-, Th2-, Eomes+ Tr1-, CTL-, PLZF+ innate- and Eomes+ innate-like cells) with multiple potential functions. We also identified two new subsets using aggregated scRNA-seq datasets from the rhesus and the cynomolgus monkey: CCR9+ Th-like cells expressing ICAM2 and ITGA1, and PLZF+ innate-like cells that display innate-associated gene signatures such as ZBTB16, TYROBP, MAP3K8, and KLRB1. Trajectory inference of cell differentiation status showed that most DP T cells in the rhesus monkey were found in the mid-to-late pseudotime, whereas DP T cells from the cynomolgus monkey were found in early pseudotime. This suggests that DP T cells in rhesus monkeys may exhibit more diverse differentiation states than those in cynomolgus monkeys. Thus, scRNA-seq and trajectory inference identified a more diverse subset of the circulating DP T cells than originally thought.
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Affiliation(s)
- Sung Min Choi
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Hi Jung Park
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Eun A Choi
- Graduate Course of Translational Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea
| | - Kyeong Cheon Jung
- Transplantation Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.,Integrated Major in Innovative Medical Science, Seoul National University Graduate School, Seoul, 03080, Republic of Korea
| | - Jae Il Lee
- Transplantation Research Institute, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea. .,Department of Medicine, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea.
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Yoshitomi H. Peripheral Helper T Cell Responses in Human Diseases. Front Immunol 2022; 13:946786. [PMID: 35880181 PMCID: PMC9307902 DOI: 10.3389/fimmu.2022.946786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/15/2022] [Indexed: 11/13/2022] Open
Abstract
A series of rheumatoid arthritis (RA) studies established a PD-1hiCXCR5-CD4+ T-cell subset that was coined peripheral helper T (Tph) cells. CXCL13 production is a key feature of Tph cells and may contribute to the formation of tertiary lymphoid structures (TLS) in inflamed tissues. In addition, Tph cells provide help to B cells in situ as efficiently as follicular helper T (Tfh) cells, and these features would implicate Tph cells in the pathogenesis of RA. Subsequent studies have revealed that Tph cells are involved in various human diseases such as autoimmune diseases, infectious diseases, and cancers. Although the analysis of human immunity has various limitations, accumulating evidence demonstrated the expansion of B cells with low somatic hypermutation and a link between TLS and immune functions in these diseases. We discuss about the emerging roles of the Tph cell and its relevant immune responses in peripheral tissues including B-cell expansion with atypical features.
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Chen W, Yang F, Lin J. Tph Cells Expanded in Primary Sjögren’s Syndrome. Front Med (Lausanne) 2022; 9:900349. [PMID: 35755031 PMCID: PMC9218540 DOI: 10.3389/fmed.2022.900349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 05/06/2022] [Indexed: 11/30/2022] Open
Abstract
Objectives PD-1+CXCR5–CD4+T peripheral helper cells, named Tph cells, contribute to B-cell immune responses and the production of antibodies in systemic lupus erythematosus and rheumatoid arthritis. However, the role of Tph cells was unknown in the pathogenesis of primary Sjögren’s syndrome (pSS). Here, we aim to explore the contribution of Tph cells in the development of pSS. Methods Sixty patients with pSS and 61 age and sex-matched healthy individuals were recruited for this study. The frequency of Tph cells in the blood was measured by flow cytometry. The expression of inducible T-cell costimulator (ICOS), MHC-II, IL-21, CCR2, CCR5, and CCR9 was evaluated in Tph cells. The relationship between Tph cells and indicators of clinical disease was assessed. Co-expression levels of PD-1, CXCR5, CD4, CCR2, and CCR5 in the salivary gland specimens from patients with pSS and patients with dry mouth and eyes but normal pathology were also analyzed. Results We demonstrated increased circulating Tph cells (7.53 ± 6.65% vs. 3.08 ± 1.31%, p < 0.0001) in patients with pSS (n = 60) compared to healthy controls (n = 61). Tph cells were significantly associated with the ESSDAI disease activity scores, IgG, ESR, IL-21, anti-SSA antibody, and CD138+/CD19+ plasma cells. Furthermore, ICOS was highly expressed in Tfh and Tph cells in patients with pSS. IL-21, MHC-II, CCR2, and CCR5 expression was higher in pSS Tph cells, and CCR9 expression was lower in pSS Tph cells than in pSS Tfh cells. Moreover, Tph cells and CCR2+CD4+T and CCR5+CD4+T cells were found in the labial gland of patients with pSS. Conclusion Our data show that Tph cells were enriched in peripheral blood and labial gland of patients with pSS. Circulating Tph cells correlated with disease activity scores, suggesting a crucial role of Tph in the development of pSS.
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Affiliation(s)
- Weiqian Chen
- Division of Rheumatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- *Correspondence: Weiqian Chen,
| | - Fan Yang
- State Key Laboratory of Infectious Diseases Diagnosis and Treatment, School of Medicine First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jin Lin
- Division of Rheumatology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Jin Lin,
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6
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Marks KE, Rao DA. T peripheral helper cells in autoimmune diseases. Immunol Rev 2022; 307:191-202. [PMID: 35103314 PMCID: PMC9009135 DOI: 10.1111/imr.13069] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 01/19/2022] [Indexed: 12/19/2022]
Abstract
Pathologic T cell-B cell interactions underlie many autoimmune diseases. The T cells that help B cells in autoimmune diseases vary in phenotype and include T cells that lack typical features of T follicular helper cells, such as expression of CXCR5 and BCL6. A population of PD-1hi CXCR5- T peripheral helper (Tph) cells has now been recognized in multiple autoantibody-associated diseases. Tph cells display a distinctive set of features, merging the ability to provide B cell help with the capacity to migrate to inflamed peripheral tissues. Here, we review the scope of immune-related conditions in which Tph cells have been implicated and provide a perspective on their potential contributions to pathologic B cell activation in autoimmune diseases. We discuss Tph cells as a promising therapeutic strategy in autoimmunity and consider the utility of tracking Tph cells in blood as a biomarker to quantify aberrant T cell-B cell activation in patients with autoimmune diseases.
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Affiliation(s)
- Kathryne E Marks
- Division of Rheumatology, Inflammation, Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Deepak A Rao
- Division of Rheumatology, Inflammation, Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Nesvaderani M, Dhillon BK, Chew T, Tang B, Baghela A, Hancock RE, Eslick GD, Cox M. Gene Expression Profiling: Identification of Novel Pathways and Potential Biomarkers in Severe Acute Pancreatitis. J Am Coll Surg 2022; 234:803-815. [PMID: 35426393 DOI: 10.1097/xcs.0000000000000115] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Determining the risk of developing severe acute pancreatitis (AP) on presentation to hospital is difficult but vital to enable early management decisions that reduce morbidity and mortality. The objective of this study was to determine global gene expression profiles of patients with different acute pancreatitis severity to identify genes and molecular mechanisms involved in the pathogenesis of severe AP. STUDY DESIGN AP patients (n = 87) were recruited within 24 hours of admission to the Emergency Department and were confirmed to exhibit at least 2 of the following features: (1) abdominal pain characteristic of AP, (2) serum amylase and/or lipase more than 3-fold the upper laboratory limit considered normal, and/or (3) radiographically demonstrated AP on CT scan. Severity was defined according to the Revised Atlanta classification. Thirty-two healthy volunteers were also recruited and peripheral venous blood was collected for performing RNA-Seq. RESULTS In severe AP, 422 genes (185 upregulated, 237 downregulated) were significantly differentially expressed when compared with moderately severe and mild cases. Pathway analysis revealed changes in specific innate and adaptive immune, sepsis-related, and surface modification pathways in severe AP. Data-driven approaches revealed distinct gene expression groups (endotypes), which were not entirely overlapping with the clinical Atlanta classification. Importantly, severe and moderately severe AP patients clustered away from healthy controls, whereas mild AP patients did not exhibit any clear separation, suggesting distinct underlying mechanisms that may influence severity of AP. CONCLUSION There were significant differences in gene expression affecting the severity of AP, revealing a central role of specific immunological pathways. Despite the existence of patient endotypes, a 4-gene transcriptomic signature (S100A8, S100A9, MMP25, and MT-ND4L) was determined that can predict severe AP with an accuracy of 64%.
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Affiliation(s)
- Maryam Nesvaderani
- From the Department of Surgery, The Centre for Evidence Based Surgery (Nesvaderani, Eslick, Cox), University of Sydney Nepean Clinical School, Nepean Hospital, Sydney, Australia
| | - Bhavjinder K Dhillon
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada (Dhillon, Baghela, Hancock)
| | - Tracy Chew
- Intensive Care Medicine (Chew, Tang), University of Sydney Nepean Clinical School, Nepean Hospital, Sydney, Australia
- Sydney Informatics Hub, University of Sydney, Sydney, Australia (Chew)
| | - Benjamin Tang
- Intensive Care Medicine (Chew, Tang), University of Sydney Nepean Clinical School, Nepean Hospital, Sydney, Australia
| | - Arjun Baghela
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada (Dhillon, Baghela, Hancock)
| | - Robert Ew Hancock
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada (Dhillon, Baghela, Hancock)
| | - Guy D Eslick
- From the Department of Surgery, The Centre for Evidence Based Surgery (Nesvaderani, Eslick, Cox), University of Sydney Nepean Clinical School, Nepean Hospital, Sydney, Australia
| | - Michael Cox
- From the Department of Surgery, The Centre for Evidence Based Surgery (Nesvaderani, Eslick, Cox), University of Sydney Nepean Clinical School, Nepean Hospital, Sydney, Australia
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Abstract
Sjögren's syndrome (SjS) is a systemic autoimmune disease marked by xerostomia (dry mouth), keratoconjunctivitis sicca (eye dryness), and other systematic disorders. Its pathogenesis involves an inflammatory process that is characterized by lymphocytic infiltration into exocrine glands and other tissues. Although the development of ectopic lymphoid tissue and overproduction of autoantibodies by hyperactive B cells suggest that they may promote SjS development, treatment directed towards them fails to induce significant laboratory or clinical improvement. T cells are overwhelming infiltrators in most phases of the disease, and the involvement of multiple T cell subsets of suggests the extraordinary complexity of SjS pathogenesis. The factors, including various cellular subtypes and molecules, regulate the activation and suppression of T cells. T cell activation induces inflammatory cell infiltration, B cell activation, tissue damage, and metabolic changes in SjS. Knowledge of the pathways that link these T cell subtypes and regulation of their activities are not completely understood. This review comprehensively summarizes the research progress and our understanding of T cells in SjS, including CD4+ T cells, CD8+ TRM cells, and innate T cells, to provide insights into for clinical treatment.
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Obesity-induced changes in human islet G protein-coupled receptor expression: Implications for metabolic regulation. Pharmacol Ther 2021; 228:107928. [PMID: 34174278 DOI: 10.1016/j.pharmthera.2021.107928] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/10/2021] [Accepted: 05/18/2021] [Indexed: 12/22/2022]
Abstract
G protein-coupled receptors (GPCRs) are a large family of cell surface receptors that are the targets for many different classes of pharmacotherapy. The islets of Langerhans are central to appropriate glucose homeostasis through their secretion of insulin, and islet function can be modified by ligands acting at the large number of GPCRs that islets express. The human islet GPCRome is not a static entity, but one that is altered under pathophysiological conditions and, in this review, we have compared expression of GPCR mRNAs in human islets obtained from normal weight range donors, and those with a weight range classified as obese. We have also considered the likely outcomes on islet function that the altered GPCR expression status confers and the possible impact that adipokines, secreted from expanded fat depots, could have at those GPCRs showing altered expression in obesity.
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The Involvement of Innate and Adaptive Immunity in the Initiation and Perpetuation of Sjögren's Syndrome. Int J Mol Sci 2021; 22:ijms22020658. [PMID: 33440862 PMCID: PMC7826728 DOI: 10.3390/ijms22020658] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/01/2021] [Accepted: 01/06/2021] [Indexed: 02/07/2023] Open
Abstract
Sjogren’s syndrome (SS) is a chronic autoimmune disease characterized by the infiltration of exocrine glands including salivary and lachrymal glands responsible for the classical dry eyes and mouth symptoms (sicca syndrome). The spectrum of disease manifestations stretches beyond the classical sicca syndrome with systemic manifestations including arthritis, interstitial lung involvement, and neurological involvement. The pathophysiology underlying SS is not well deciphered, but several converging lines of evidence have supported the conjuncture of different factors interplaying together to foster the initiation and perpetuation of the disease. The innate and adaptive immune system play a cardinal role in this process. In this review, we discuss the inherent parts played by both the innate and adaptive immune system in the pathogenesis of SS.
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Atanes P, Lee V, Huang GC, Persaud SJ. The role of the CCL25-CCR9 axis in beta-cell function: potential for therapeutic intervention in type 2 diabetes. Metabolism 2020; 113:154394. [PMID: 33058852 DOI: 10.1016/j.metabol.2020.154394] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/15/2020] [Accepted: 10/05/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND PURPOSE Chemokines are known to play essential roles mediating immunity and inflammation in many physiological and pathophysiological processes, with reports linking their action to the development of obesity, insulin resistance and type 2 diabetes (T2D). Given our findings of highly upregulated mRNA expression of the chemokine receptor CCR9 in islets from obese human donors, we have determined the effects of CCR9 activation by CCL25 on islet function and viability. BASIC PROCEDURES RT-qPCR was used to measure expression of 384 GPCR mRNAs in human islets from organ donors with normal and elevated BMI. mRNA encoding CCR9, a receptor that was highly upregulated in islets from obese donors, was also quantified in islets from lean and high-fat diet (HFD) mice. The effects of CCR9 activation by exogenous CCL25 in human and mouse islets and its inhibition by the CCR9 antagonist vercirnon on insulin secretion, apoptosis and cAMP accumulation were examined using standard techniques. MAIN FINDINGS The qPCR analysis showed altered expression of several GPCRs in islets isolated from lean and obese donors. CCR9 displayed over 90-fold upregulation in islets from obese individuals, and it was also significantly upregulated in islets from obese mice. In isolated human and mouse islets exogenous CCL25 inhibited glucose-induced insulin secretion in a concentration-dependent manner, enhanced cytokine-induced apoptosis and significantly reduced forskolin-induced elevation in cAMP levels. These detrimental effects of CCL25 in islets were blocked by vercirnon, which had no effect on its own. PRINCIPAL CONCLUSIONS We have shown that CCL25 acts via the Gαi-coupled receptor CCR9 to impair beta-cell function by inhibiting insulin secretion and promoting cytokine-induced apoptosis. Upregulation of CCR9 in islets in obesity, possibly secondary to accumulation of passenger immune cells, may predispose to metabolic dysfunction and our data suggest that CCL25 downregulation or CCR9 inhibition could be explored to treat T2D.
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Affiliation(s)
- Patricio Atanes
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 1UL, United Kingdom.
| | - Vivian Lee
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 1UL, United Kingdom.
| | - Guo Cai Huang
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 1UL, United Kingdom.
| | - Shanta J Persaud
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, SE1 1UL, United Kingdom.
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Eiger DS, Boldizsar N, Honeycutt CC, Gardner J, Rajagopal S. Biased agonism at chemokine receptors. Cell Signal 2020; 78:109862. [PMID: 33249087 DOI: 10.1016/j.cellsig.2020.109862] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/07/2020] [Accepted: 11/24/2020] [Indexed: 12/11/2022]
Abstract
In the human chemokine system, interactions between the approximately 50 known endogenous chemokine ligands and 20 known chemokine receptors (CKRs) regulate a wide range of cellular functions and biological processes including immune cell activation and homeostasis, development, angiogenesis, and neuromodulation. CKRs are a family of G protein-coupled receptors (GPCR), which represent the most common and versatile class of receptors in the human genome and the targets of approximately one third of all Food and Drug Administration-approved drugs. Chemokines and CKRs bind with significant promiscuity, as most CKRs can be activated by multiple chemokines and most chemokines can activate multiple CKRs. While these ligand-receptor interactions were previously regarded as redundant, it is now appreciated that many chemokine:CKR interactions display biased agonism, the phenomenon in which different ligands binding to the same receptor signal through different pathways with different efficacies, leading to distinct biological effects. Notably, these biased responses can be modulated through changes in ligand, receptor, and or the specific cellular context (system). In this review, we explore the biochemical mechanisms, functional consequences, and therapeutic potential of biased agonism in the chemokine system. An enhanced understanding of biased agonism in the chemokine system may prove transformative in the understanding of the mechanisms and consequences of biased signaling across all GPCR subtypes and aid in the development of biased pharmaceuticals with increased therapeutic efficacy and safer side effect profiles.
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Affiliation(s)
| | - Noelia Boldizsar
- Trinity College of Arts and Sciences, Duke University, Durham, NC 27710, USA.
| | | | - Julia Gardner
- Trinity College of Arts and Sciences, Duke University, Durham, NC 27710, USA.
| | - Sudarshan Rajagopal
- Department of Biochemistry, Duke University, Durham, NC 27710, USA; Department of Medicine, Duke University, Durham, NC 27710, USA.
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Park Y, Zhang Q, Wiegertjes GF, Fernandes JMO, Kiron V. Adherent Intestinal Cells From Atlantic Salmon Show Phagocytic Ability and Express Macrophage-Specific Genes. Front Cell Dev Biol 2020; 8:580848. [PMID: 33178695 PMCID: PMC7593592 DOI: 10.3389/fcell.2020.580848] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 09/22/2020] [Indexed: 12/16/2022] Open
Abstract
Our knowledge of the intestinal immune system of fish is rather limited compared to mammals. Very little is known about the immune cells including the phagocytic cells in fish intestine. Hence, employing imaging flow cytometry and RNA sequencing, we studied adherent cells isolated from healthy Atlantic salmon. Phagocytic activity and selected gene expression of adherent cells from the distal intestine (adherent intestinal cells, or AIC) were compared with those from head kidney (adherent kidney cells, or AKC). Phagocytic activity of the two cell types was assessed based on the uptake of Escherichia coli BioParticlesTM. AIC showed phagocytic ability but the phagocytes were of different morphology compared to AKC. Transcriptomic analysis revealed that AIC expressed genes associated with macrophages, T cells, and endothelial cells. Heatmap analysis of selected genes indicated that the adherent cells from the two organs had apparently higher expression of macrophage-related genes. We believe that the adherent intestinal cells have phagocytic characteristics and high expression of genes commonly associated with macrophages. We envisage the possibilities for future studies on enriched populations of adherent intestinal cells.
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Affiliation(s)
- Youngjin Park
- Faculty of Biosciences and Aquaculture, Nord University, Bodø, Norway
| | - Qirui Zhang
- Division of Clinical Genetics, Lund University, Lund, Sweden
| | - Geert F Wiegertjes
- Aquaculture and Fisheries Group, Wageningen University & Research, Wageningen, Netherlands
| | | | - Viswanath Kiron
- Faculty of Biosciences and Aquaculture, Nord University, Bodø, Norway
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Butyrate induced Tregs are capable of migration from the GALT to the pancreas to restore immunological tolerance during type-1 diabetes. Sci Rep 2020; 10:19120. [PMID: 33154424 PMCID: PMC7644709 DOI: 10.1038/s41598-020-76109-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/21/2020] [Indexed: 12/12/2022] Open
Abstract
Type-1 diabetes (T1D) is an autoimmune disease caused by progressive loss of insulin-producing beta cells in the pancreas. Butyrate is a commensal microbial-derived metabolite, implicated in intestinal homeostasis and immune regulation. Here, we investigated the mechanism of diabetes remission in non-obese diabetic (NOD) mice following butyrate administration. Sodium butyrate (150 mM) was administered to female NOD mice in drinking water after the onset of hyperglycemia (15-25 weeks age) and at 4 weeks of age (early-intervention group). Butyrate administration reduced the progression of hyperglycemia in diabetic mice and delayed onset of diabetes in the early-intervention group with a reduction in insulitis. Butyrate administration increased regulatory T cells (Tregs) in the colon, mesenteric lymph nodes, Peyer's patches, and its protective effects diminished upon depletion of Tregs. Further, an increase in α4β7, CCR9, and GPR15 expressing Tregs in the pancreatic lymph nodes (PLN) and pancreas in butyrate-treated mice suggested migration of gut-primed Tregs towards the pancreas. Finally, the adoptive transfer experiments demonstrated that induced Tregs from gut-associated lymphoid tissue can migrate towards the pancreas and PLN and delay the onset of diabetes. Our results thus suggest that early administration of butyrate can restore immunological tolerance during T1D via induction of Tregs with migratory capabilities.
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15
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Dai Z, Zhang J, Wu Q, Fang H, Shi C, Li Z, Lin C, Tang D, Wang D. Intestinal microbiota: a new force in cancer immunotherapy. Cell Commun Signal 2020; 18:90. [PMID: 32522267 PMCID: PMC7288675 DOI: 10.1186/s12964-020-00599-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/18/2020] [Indexed: 02/07/2023] Open
Abstract
Cancer displays high levels of heterogeneity and mutation potential, and curing cancer remains a challenge that clinicians and researchers are eager to overcome. In recent years, the emergence of cancer immunotherapy has brought hope to many patients with cancer. Cancer immunotherapy reactivates the immune function of immune cells by blocking immune checkpoints, thereby restoring the anti-tumor activity of immune cells. However, immune-related adverse events are a common complication of checkpoint blockade, which might be caused by the physiological role of checkpoint pathways in regulating adaptive immunity and preventing autoimmunity. In this context, the intestinal microbiota has shown great potential in the immunotherapy of cancer. The intestinal microbiota not only regulates the immune function of the body, but also optimizes the therapeutic effect of immune checkpoint inhibitors, thus reducing the occurrence of complications. Therefore, manipulating the intestinal microbiota is expected to enhance the effectiveness of immune checkpoint inhibitors and reduce adverse reactions, which will lead to new breakthroughs in immunotherapy and cancer management. Video abstract.
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Affiliation(s)
- Zhujiang Dai
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Jingqiu Zhang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| | - Qi Wu
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Huiwen Fang
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Chunfeng Shi
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Zhen Li
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Chaobiao Lin
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Dong Tang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| | - Daorong Wang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
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