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Burtis AEC, DeNicola DMC, Ferguson ME, Santos RG, Pinilla C, Kriss MS, Orlicky DJ, Tamburini BAJ, Gillen AE, Burchill MA. Ag-driven CD8+ T cell clonal expansion is a prominent feature of MASH in humans and mice. Hepatology 2024:01515467-990000000-00978. [PMID: 39047085 DOI: 10.1097/hep.0000000000000971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 05/31/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND AND AIMS Chronic liver disease due to metabolic dysfunction-associated steatohepatitis (MASH) is a rapidly increasing global epidemic. MASH progression is a consequence of the complex interplay between inflammatory insults and dysregulated hepatic immune responses. T lymphocytes have been shown to accumulate in the liver during MASH, but the cause and consequence of T cell accumulation in the liver remain unclear. Our study aimed to define the phenotype and T cell receptor diversity of T cells from human cirrhotic livers and an animal model of MASH to begin resolving their function in disease. APPROACH AND RESULTS In these studies, we evaluated differences in T cell phenotype in the context of liver disease. Accordingly, we isolated liver resident T cell populations from humans with cirrhosis and from mice with diet-induced MASH. Using both 5' single-cell sequencing and flow cytometry, we defined the phenotype and T cell receptor repertoire of liver resident T cells during health and disease. CONCLUSIONS MASH-induced human cirrhosis and diet-induced MASH in mice resulted in the accumulation of activated and clonally expanded T cells in the liver. The clonally expanded T cells in the liver expressed markers of chronic antigenic stimulation, including PD1, TIGIT, and TOX. Overall, this study establishes for the first time that T cells undergo Ag-dependent clonal expansion and functional differentiation during the progression of MASH. These studies could lead to the identification of antigenic targets that drive T cell activation, clonal expansion, and recruitment to the liver during MASH.
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Affiliation(s)
- Abbigayl E C Burtis
- Division of Gastroenterology and Hepatology, Department of Medicine, Aurora, Colorado, USA
- Molecular Biology Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Destiny M C DeNicola
- Division of Gastroenterology and Hepatology, Department of Medicine, Aurora, Colorado, USA
- Molecular Biology Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Megan E Ferguson
- Division of Gastroenterology and Hepatology, Department of Medicine, Aurora, Colorado, USA
| | - Radleigh G Santos
- Department of Mathematics, Nova Southeastern University, Fort Lauderdale, Florida, USA
| | - Clemencia Pinilla
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Michael S Kriss
- Division of Gastroenterology and Hepatology, Department of Medicine, Aurora, Colorado, USA
| | - David J Orlicky
- Department of Pathology, University of Colorado Anschutz Medical Campus. Aurora, Colorado, USA
| | - Beth A Jirón Tamburini
- Division of Gastroenterology and Hepatology, Department of Medicine, Aurora, Colorado, USA
- Molecular Biology Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Austin E Gillen
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus. Aurora, Colorado, USA
| | - Matthew A Burchill
- Division of Gastroenterology and Hepatology, Department of Medicine, Aurora, Colorado, USA
- Molecular Biology Graduate Program, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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Burtis AEC, DeNicola DMC, Ferguson ME, Santos RG, Pinilla C, Kriss MS, Orlicky DJ, Tamburini BAJ, Gillen AE, Burchill MA. Antigen-driven CD8 + T cell clonal expansion is a prominent feature of MASH in humans and mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.20.583964. [PMID: 38562766 PMCID: PMC10983976 DOI: 10.1101/2024.03.20.583964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Background and Aims Chronic liver disease due to metabolic dysfunction-associated steatohepatitis (MASH) is a rapidly increasing global epidemic. MASH progression is a consequence of the complex interplay between inflammatory insults and dysregulated hepatic immune responses. T lymphocytes have been shown to accumulate in the liver during MASH, but the cause and consequence of T cell accumulation in the liver remain unclear. Our study aimed to define the phenotype and T cell receptor diversity of T cells from human cirrhotic livers and an animal model of MASH to begin resolving their function in disease. Approach and Results In these studies, we evaluated differences in T cell phenotype in the context of liver disease we isolated liver resident T cell populations from individuals with cirrhosis and a murine model of MASH. Using both 5' single cell sequencing and flow cytometry we defined the phenotype and T cell receptor repertoire of liver resident T cells during health and disease. Conclusions MASH-induced cirrhosis and diet-induced MASH in mice resulted in the accumulation of activated and clonally expanded T cells in the liver. The clonally expanded T cells in the liver expressed markers of chronic antigenic stimulation, including PD1 , TIGIT and TOX . Overall, this study establishes for the first time that T cells undergo antigen-dependent clonal expansion and functional differentiation during the progression of MASH. These studies could lead to the identification of potential antigenic targets that drive T cell activation, clonal expansion, and recruitment to the liver during MASH.
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Martínez-Cortés F, Domínguez-Romero AN, Pérez-Hernández EG, Orozco-Delgado DL, Avila S, Odales J, Guzman Valle J, Gevorkian G, Manoutcharian K. Tumor antigen-unbiased variable epitope library contains mimotopes with antitumor effect in a mouse model of breast cancer. Mol Immunol 2023; 157:91-100. [PMID: 37002957 DOI: 10.1016/j.molimm.2023.03.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 03/23/2023] [Accepted: 03/26/2023] [Indexed: 04/03/2023]
Abstract
Breast cancer is one of the leading causes of death that affects the female population worldwide. Despite advances in treatments and a greater understanding of the disease, there are still difficulties in successfully treating patients. Currently, the main challenge in the field of cancer vaccines is antigenic variability which can reduce antigen-specific T- cell response efficacy. The search for and validation of immunogenic antigen targets increased dramatically over the past few decades and, with the advent of modern sequencing techniques, permitting the fast and accurate identification of the neoantigen landscape of tumor cells, will undoubtedly continue to grow exponentially for years to come. We have previously implemented Variable Epitope Libraries (VEL) as an unconventional vaccine strategy in preclinical models and for identifying and selecting mutant epitope variants. Here, we used an alanine-based sequence to generate a 9-mer VEL-like combinatorial mimotope library G3d as a new class of vaccine immunogen. An in silico analysis of the 16,000 G3d-derived sequences revealed potential MHC-I binders and immunogenic mimotopes. We demonstrated the antitumor effect of treatment with G3d in the 4T1 murine model of breast cancer. Moreover, two different T cell proliferation screening assays against a panel of randomly selected G3d-derived mimotopes allowed the isolation of both stimulatory and inhibitory mimotopes showing differential therapeutic vaccine efficacy. Thus, the mimotope library is a promising vaccine immunogen and a reliable source for isolating molecular cancer vaccine components.
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Affiliation(s)
- Fernando Martínez-Cortés
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Allan Noé Domínguez-Romero
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Eréndira G Pérez-Hernández
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Diana L Orozco-Delgado
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Sandra Avila
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Josué Odales
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Jesus Guzman Valle
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Goar Gevorkian
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico
| | - Karen Manoutcharian
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, AP 70228, México City 04510, Mexico.
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Zhou W, Craft J, Ojemann A, Bergen L, Graner A, Gonzales A, He Q, Kopper T, Smith M, Graner MW, Yu X. Glioblastoma Extracellular Vesicle-Specific Peptides Inhibit EV-Induced Neuronal Cytotoxicity. Int J Mol Sci 2022; 23:ijms23137200. [PMID: 35806205 PMCID: PMC9266738 DOI: 10.3390/ijms23137200] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/20/2022] [Accepted: 06/24/2022] [Indexed: 02/04/2023] Open
Abstract
WHO Grade 4 IDH-wild type astrocytoma (GBM) is the deadliest brain tumor with a poor prognosis. Meningioma (MMA) is a more common “benign” central nervous system tumor but with significant recurrence rates. There is an urgent need for brain tumor biomarkers for early diagnosis and effective treatment options. Extracellular vesicles (EVs) are tiny membrane-enclosed vesicles that play essential functions in cell-to-cell communications among tumor cells. We aimed to identify epitopes of brain tumor EVs by phage peptide libraries. EVs from GBM plasma, MMA plasma, or brain tumor cell lines were used to screen phage-displayed random peptide libraries to identify high-affinity peptides. We purified EVs from three GBM plasma pools (23 patients), one MMA pool (10 patients), and four brain tumor cell lines. We identified a total of 21 high-affinity phage peptides (12 unique) specific to brain tumor EVs. The peptides shared high sequence homologies among those selected by the same EVs. Dose–response ELISA demonstrated that phage peptides were specific to brain tumor EVs compared to controls. Peptide affinity purification identified unique brain tumor EV subpopulations. Significantly, GBM EV peptides inhibit brain tumor EV-induced complement-dependent cytotoxicity (necrosis) in neurons. We conclude that phage display technology could identify specific peptides to isolate and characterize tumor EVs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Xiaoli Yu
- Correspondence: ; Tel.: +1-303-724-9182
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