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Yang Q, Xu L, Dong W, Li X, Wang K, Dong S, Zhang X, Yang T, Jiang F, Zhang B, Luo G, Gao X, Wang G. HLAIImaster: a deep learning method with adaptive domain knowledge predicts HLA II neoepitope immunogenic responses. Brief Bioinform 2024; 25:bbae302. [PMID: 38920343 PMCID: PMC11200192 DOI: 10.1093/bib/bbae302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/20/2024] [Accepted: 06/11/2024] [Indexed: 06/27/2024] Open
Abstract
While significant strides have been made in predicting neoepitopes that trigger autologous CD4+ T cell responses, accurately identifying the antigen presentation by human leukocyte antigen (HLA) class II molecules remains a challenge. This identification is critical for developing vaccines and cancer immunotherapies. Current prediction methods are limited, primarily due to a lack of high-quality training epitope datasets and algorithmic constraints. To predict the exogenous HLA class II-restricted peptides across most of the human population, we utilized the mass spectrometry data to profile >223 000 eluted ligands over HLA-DR, -DQ, and -DP alleles. Here, by integrating these data with peptide processing and gene expression, we introduce HLAIImaster, an attention-based deep learning framework with adaptive domain knowledge for predicting neoepitope immunogenicity. Leveraging diverse biological characteristics and our enhanced deep learning framework, HLAIImaster is significantly improved against existing tools in terms of positive predictive value across various neoantigen studies. Robust domain knowledge learning accurately identifies neoepitope immunogenicity, bridging the gap between neoantigen biology and the clinical setting and paving the way for future neoantigen-based therapies to provide greater clinical benefit. In summary, we present a comprehensive exploitation of the immunogenic neoepitope repertoire of cancers, facilitating the effective development of "just-in-time" personalized vaccines.
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Affiliation(s)
- Qiang Yang
- School of Medicine and Health, Harbin Institute of Technology, Yikuang Street, Harbin 150000, China
| | - Long Xu
- School of Computer Science and Technology, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
| | - Weihe Dong
- College of Computer and Control Engineering, Northeast Forestry University, Hexing Road, Harbin 150004, China
| | - Xiaokun Li
- School of Computer Science and Technology, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
- School of Computer Science and Technology, Heilongjiang University, Xuefu Road, Harbin 150080, China
- Postdoctoral Program of Heilongjiang Hengxun Technology Co., Ltd., Xuefu Road, Harbin 150090, China
- Shandong Hengxun Technology Co., Ltd., Miaoling Road, Qingdao 266100, China
| | - Kuanquan Wang
- School of Computer Science and Technology, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
| | - Suyu Dong
- College of Computer and Control Engineering, Northeast Forestry University, Hexing Road, Harbin 150004, China
| | - Xianyu Zhang
- Department of Breast Surgery, Harbin Medical University Cancer Hospital, Haping Road, Harbin 150081, China
| | - Tiansong Yang
- Department of Rehabilitation, The First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, and Traditional Chinese Medicine Informatics Key Laboratory of Heilongjiang Province, Heping Road, Harbin 150040, China
| | - Feng Jiang
- School of Medicine and Health, Harbin Institute of Technology, Yikuang Street, Harbin 150000, China
| | - Bin Zhang
- Computer, Electrical and Mathematical Sciences & Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal 23955, Saudi Arabia
| | - Gongning Luo
- Computer, Electrical and Mathematical Sciences & Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal 23955, Saudi Arabia
| | - Xin Gao
- Computer, Electrical and Mathematical Sciences & Engineering Division, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal 23955, Saudi Arabia
| | - Guohua Wang
- College of Computer and Control Engineering, Northeast Forestry University, Hexing Road, Harbin 150004, China
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2
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Alarcon NO, Jaramillo M, Mansour HM, Sun B. Therapeutic Cancer Vaccines—Antigen Discovery and Adjuvant Delivery Platforms. Pharmaceutics 2022; 14:pharmaceutics14071448. [PMID: 35890342 PMCID: PMC9325128 DOI: 10.3390/pharmaceutics14071448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/28/2022] [Accepted: 06/30/2022] [Indexed: 12/15/2022] Open
Abstract
For decades, vaccines have played a significant role in protecting public and personal health against infectious diseases and proved their great potential in battling cancers as well. This review focused on the current progress of therapeutic subunit vaccines for cancer immunotherapy. Antigens and adjuvants are key components of vaccine formulations. We summarized several classes of tumor antigens and bioinformatic approaches of identification of tumor neoantigens. Pattern recognition receptor (PRR)-targeting adjuvants and their targeted delivery platforms have been extensively discussed. In addition, we emphasized the interplay between multiple adjuvants and their combined delivery for cancer immunotherapy.
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Affiliation(s)
- Neftali Ortega Alarcon
- Skaggs Pharmaceutical Sciences Center, College of Pharmacy, The University of Arizona, Tucson, AZ 85721, USA; (N.O.A.); (M.J.); (H.M.M.)
| | - Maddy Jaramillo
- Skaggs Pharmaceutical Sciences Center, College of Pharmacy, The University of Arizona, Tucson, AZ 85721, USA; (N.O.A.); (M.J.); (H.M.M.)
| | - Heidi M. Mansour
- Skaggs Pharmaceutical Sciences Center, College of Pharmacy, The University of Arizona, Tucson, AZ 85721, USA; (N.O.A.); (M.J.); (H.M.M.)
- The University of Arizona Cancer Center, Tucson, AZ 85721, USA
- Department of Medicine, College of Medicine, The University of Arizona, Tucson, AZ 85724, USA
- BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
| | - Bo Sun
- Skaggs Pharmaceutical Sciences Center, College of Pharmacy, The University of Arizona, Tucson, AZ 85721, USA; (N.O.A.); (M.J.); (H.M.M.)
- The University of Arizona Cancer Center, Tucson, AZ 85721, USA
- BIO5 Institute, The University of Arizona, Tucson, AZ 85721, USA
- Correspondence: ; Tel.: +1-520-621-6420
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3
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High GILT Expression Is Associated with Improved Survival in Metastatic Melanoma Patients Treated with Immune Checkpoint Inhibition. Cancers (Basel) 2022; 14:cancers14092200. [PMID: 35565329 PMCID: PMC9100272 DOI: 10.3390/cancers14092200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/21/2022] [Accepted: 04/26/2022] [Indexed: 02/01/2023] Open
Abstract
Simple Summary Skin cancer is the most common type of cancer, with melanoma being among the deadliest of skin cancers due to its propensity to metastasize. Immune checkpoint inhibitors (ICI) generate anti-tumor immune responses resulting in improved outcomes in patients with metastatic melanoma. However, only a subset of melanoma patients responds to these therapies, which are costly and come with a risk of adverse effects. Therefore, there is a need for biomarkers to predict which patients will respond to ICI. We found that ICI-treated metastatic melanoma patients with high GILT mRNA expression in bulk tumor samples had improved survival. Additionally, high GILT protein expression within metastatic melanoma cells was associated with improved survival in patients treated with ICI. This study suggests that GILT may serve as a biomarker to predict which patients will respond to ICI, which could improve patient care, reduce healthcare costs, and facilitate appropriate selection of therapies for patients with metastatic melanoma. Abstract Gamma-interferon-inducible lysosomal thiol reductase (GILT) is critical for MHC class II restricted presentation of multiple melanoma antigens. There is variable GILT protein expression in malignant melanocytes in melanoma specimens. High GILT mRNA expression in melanoma specimens is associated with improved overall survival, before the advent of immune checkpoint inhibitors (ICI). However, the association of GILT in metastatic melanoma with survival in patients treated with ICI and the cell type expressing GILT associated with survival have not been determined. Using RNA sequencing datasets, high GILT mRNA expression in metastatic melanoma specimens was associated with improved progression-free and overall survival in patients treated with ICI. A clinical dataset of metastatic melanoma specimens was generated and annotated with clinical information. Positive GILT immunohistochemical staining in antigen presenting cells and melanoma cells was observed in 100% and 65% of metastatic melanoma specimens, respectively. In the subset of patients treated with ICI in the clinical dataset, high GILT protein expression within melanoma cells was associated with improved overall survival. The association of GILT mRNA and protein expression with survival was independent of cancer stage. These studies support that high GILT mRNA expression in bulk tumor samples and high GILT protein expression in melanoma cells is associated with improved survival in ICI-treated patients. These findings support further investigation of GILT as a biomarker to predict the response to ICI.
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Lang F, Schrörs B, Löwer M, Türeci Ö, Sahin U. Identification of neoantigens for individualized therapeutic cancer vaccines. Nat Rev Drug Discov 2022; 21:261-282. [PMID: 35105974 PMCID: PMC7612664 DOI: 10.1038/s41573-021-00387-y] [Citation(s) in RCA: 164] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2021] [Indexed: 02/07/2023]
Abstract
Somatic mutations in cancer cells can generate tumour-specific neoepitopes, which are recognized by autologous T cells in the host. As neoepitopes are not subject to central immune tolerance and are not expressed in healthy tissues, they are attractive targets for therapeutic cancer vaccines. Because the vast majority of cancer mutations are unique to the individual patient, harnessing the full potential of this rich source of targets requires individualized treatment approaches. Many computational algorithms and machine-learning tools have been developed to identify mutations in sequence data, to prioritize those that are more likely to be recognized by T cells and to design tailored vaccines for every patient. In this Review, we fill the gaps between the understanding of basic mechanisms of T cell recognition of neoantigens and the computational approaches for discovery of somatic mutations and neoantigen prediction for cancer immunotherapy. We present a new classification of neoantigens, distinguishing between guarding, restrained and ignored neoantigens, based on how they confer proficient antitumour immunity in a given clinical context. Such context-based differentiation will contribute to a framework that connects neoantigen biology to the clinical setting and medical peculiarities of cancer, and will enable future neoantigen-based therapies to provide greater clinical benefit.
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Affiliation(s)
- Franziska Lang
- TRON Translational Oncology, Mainz, Germany
- Faculty of Biology, Johannes Gutenberg University Mainz, Mainz, Germany
| | | | | | | | - Ugur Sahin
- BioNTech, Mainz, Germany.
- University Medical Center, Johannes Gutenberg University, Mainz, Germany.
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5
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Liu X, Xu Y, Xiong W, Yin B, Huang Y, Chu J, Xing C, Qian C, Du Y, Duan T, Wang HY, Zhang N, Yu JS, An Z, Wang R. Development of a TCR-like antibody and chimeric antigen receptor against NY-ESO-1/HLA-A2 for cancer immunotherapy. J Immunother Cancer 2022; 10:jitc-2021-004035. [PMID: 35338087 PMCID: PMC8961179 DOI: 10.1136/jitc-2021-004035] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2022] [Indexed: 01/09/2023] Open
Abstract
Background The current therapeutic antibodies and chimeric antigen receptor (CAR) T cells are capable of recognizing surface antigens, but not of intracellular proteins, thus limiting the target coverage for drug development. To mimic the feature of T-cell receptor (TCR) that recognizes the complex of major histocompatibility class I and peptide on the cell surface derived from the processed intracellular antigen, we used NY-ESO-1, a cancer-testis antigen, to develop a TCR-like fully human IgG1 antibody and its derivative, CAR-T cells, for cancer immunotherapy. Methods Human single-chain variable antibody fragment (scFv) phage library (~10∧11) was screened against HLA-A2/NY-ESO-1 (peptide 157–165) complex to obtain target-specific antibodies. The specificity and affinity of those antibodies were characterized by flow cytometry, ELISA, biolayer interferometry, and confocal imaging. The biological functions of CAR-T cells were evaluated against target tumor cells in vitro. In vivo antitumor activity was investigated in a triple-negative breast cancer (TNBC) model and primary melanoma tumor model in immunocompromised mice. Results Monoclonal antibody 2D2 identified from phage-displayed library specifically bound to NY-ESO-1157-165 in the context of human leukocyte antigen HLA-A*02:01 but not to non-A2 or NY-ESO-1 negative cells. The second-generation CAR-T cells engineered from 2D2 specifically recognized and eliminated A2+/NY-ESO-1+tumor cells in vitro, inhibited tumor growth, and prolonged the overall survival of mice in TNBC and primary melanoma tumor model in vivo. Conclusions This study showed the specificity of the antibody identified from human scFv phage library and demonstrated the potential antitumor activity by TCR-like CAR-T cells both in vitro and in vivo, warranting further preclinical and clinical evaluation of the TCR-like antibody in patients. The generation of TCR-like antibody and its CAR-T cells provides the state-of-the-art platform and proof-of-concept validation to broaden the scope of target antigen recognition and sheds light on the development of novel therapeutics for cancer immunotherapy.
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Affiliation(s)
- Xin Liu
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA.,Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, Texas, USA
| | - Yixiang Xu
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Wei Xiong
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Bingnan Yin
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Yuqian Huang
- Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA.,Xiangya School of Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Junjun Chu
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Changsheng Xing
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Chen Qian
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Yang Du
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Tianhao Duan
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Helen Y Wang
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA.,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA
| | - Ningyan Zhang
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - John S Yu
- Neurosurgical Oncology in the Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Zhiqiang An
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Rongfu Wang
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA .,Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, Texas, USA.,Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, Texas, USA
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6
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Therapeutic Vaccines against Hepatocellular Carcinoma in the Immune Checkpoint Inhibitor Era: Time for Neoantigens? Int J Mol Sci 2022; 23:ijms23042022. [PMID: 35216137 PMCID: PMC8875127 DOI: 10.3390/ijms23042022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/07/2022] [Accepted: 02/10/2022] [Indexed: 02/01/2023] Open
Abstract
Immune checkpoint inhibitors (ICI) have been used as immunotherapy for hepatocellular carcinoma (HCC) with promising but still limited results. Identification of immune elements in the tumor microenvironment of individual HCC patients may help to understand the correlations of responses, as well as to design personalized therapies for non-responder patients. Immune-enhancing strategies, such as vaccination, would complement ICI in those individuals with poorly infiltrated tumors. The prominent role of responses against mutated tumor antigens (neoAgs) in ICI-based therapies suggests that boosting responses against these epitopes may specifically target tumor cells. In this review we summarize clinical vaccination trials carried out in HCC, the available information on potentially immunogenic neoAgs in HCC patients, and the most recent results of neoAg-based vaccines in other tumors. Despite the low/intermediate mutational burden observed in HCC, data obtained from neoAg-based vaccines in other tumors indicate that vaccines directed against these tumor-specific antigens would complement ICI in a subset of HCC patients.
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7
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Parras D, Solé P, Delong T, Santamaría P, Serra P. Recognition of Multiple Hybrid Insulin Peptides by a Single Highly Diabetogenic T-Cell Receptor. Front Immunol 2021; 12:737428. [PMID: 34527002 PMCID: PMC8435627 DOI: 10.3389/fimmu.2021.737428] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/03/2021] [Indexed: 12/11/2022] Open
Abstract
The mechanisms underlying the major histocompatibility complex class II (MHCII) type 1 diabetes (T1D) association remain incompletely understood. We have previously shown that thymocytes expressing the highly diabetogenic, I-Ag7-restricted 4.1-T-cell receptor (TCR) are MHCII-promiscuous, and that, in MHCII-heterozygous mice, they sequentially undergo positive and negative selection/Treg deviation by recognizing pro- and anti-diabetogenic MHCII molecules on cortical thymic epithelial cells and medullary hematopoietic antigen-presenting cells (APCs), respectively. Here, we use a novel autoantigen discovery approach to define the antigenic specificity of this TCR in the context of I-Ag7. This was done by screening the ability of random epitope-GS linker-I- A β g 7 chain fusion pools to form agonistic peptide-MHCII complexes on the surface of I- A α d chain-transgenic artificial APCs. Pool deconvolution, I-Ag7-binding register-fixing, TCR contact residue mapping, and alanine scanning mutagenesis resulted in the identification of a 4.1-TCR recognition motif XL(G/A)XEXE(D/E)X that was shared by seven agonistic hybrid insulin peptides (HIPs) resulting from the fusion of several different chromogranin A and/or insulin C fragments, including post-translationally modified variants. These data validate a novel, highly sensitive MHCII-restricted epitope discovery approach for orphan TCRs and suggest thymic selection of autoantigen-promiscuous TCRs as a mechanism for the murine T1D-I-Ag7-association.
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MESH Headings
- Animals
- Autoantigens/genetics
- Autoantigens/immunology
- Autoantigens/metabolism
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- CHO Cells
- Coculture Techniques
- Cricetulus
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Diabetes Mellitus, Type 1/genetics
- Diabetes Mellitus, Type 1/immunology
- Diabetes Mellitus, Type 1/metabolism
- Epitopes
- HEK293 Cells
- Histocompatibility Antigens Class II/genetics
- Histocompatibility Antigens Class II/immunology
- Histocompatibility Antigens Class II/metabolism
- Humans
- Insulin/genetics
- Insulin/immunology
- Insulin/metabolism
- Jurkat Cells
- Mice, Inbred NOD
- Mice, Knockout
- Peptide Fragments/genetics
- Peptide Fragments/immunology
- Peptide Fragments/metabolism
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/metabolism
- Mice
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Affiliation(s)
- Daniel Parras
- Institut D’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Patricia Solé
- Institut D’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Thomas Delong
- Skaggs School of Pharmacy and Pharmaceutical Sciences (SSPPS), Department of Pharmaceutical Sciences, University of Colorado, Aurora, CO, United States
| | - Pere Santamaría
- Institut D’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Pau Serra
- Institut D’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
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Abstract
Next-generation sequencing technologies have revolutionized our ability to catalog the landscape of somatic mutations in tumor genomes. These mutations can sometimes create so-called neoantigens, which allow the immune system to detect and eliminate tumor cells. However, efforts that stimulate the immune system to eliminate tumors based on their molecular differences have had less success than has been hoped for, and there are conflicting reports about the role of neoantigens in the success of this approach. Here we review some of the conflicting evidence in the literature and highlight key aspects of the tumor-immune interface that are emerging as major determinants of whether mutation-derived neoantigens will contribute to an immunotherapy response. Accounting for these factors is expected to improve success rates of future immunotherapy approaches.
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Affiliation(s)
- Andrea Castro
- Biomedical Informatics Program, University of California San Diego, La Jolla, California 92093, USA
- Division of Medical Genetics, Department of Medicine, University of California San Diego, La Jolla, California 92093, USA;
| | - Maurizio Zanetti
- Department of Medicine, University of California San Diego, La Jolla, California 92093, USA
- The Laboratory of Immunology, Moores Cancer Center, University of California San Diego, La Jolla, California 92093, USA
| | - Hannah Carter
- Division of Medical Genetics, Department of Medicine, University of California San Diego, La Jolla, California 92093, USA;
- The Laboratory of Immunology, Moores Cancer Center, University of California San Diego, La Jolla, California 92093, USA
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9
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Esprit A, de Mey W, Bahadur Shahi R, Thielemans K, Franceschini L, Breckpot K. Neo-Antigen mRNA Vaccines. Vaccines (Basel) 2020; 8:E776. [PMID: 33353155 PMCID: PMC7766040 DOI: 10.3390/vaccines8040776] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 12/14/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
The interest in therapeutic cancer vaccines has caught enormous attention in recent years due to several breakthroughs in cancer research, among which the finding that successful checkpoint blockade treatments reinvigorate neo-antigen-specific T cells and that successful adoptive cell therapies are directed towards neo-antigens. Neo-antigens are cancer-specific antigens, which develop from somatic mutations in the cancer cell genome that can be highly immunogenic and are not subjected to central tolerance. As the majority of neo-antigens are unique to each patient's cancer, a vaccine technology that is flexible and potent is required to develop personalized neo-antigen vaccines. In vitro transcribed mRNA is such a technology platform and has been evaluated for delivery of neo-antigens to professional antigen-presenting cells both ex vivo and in vivo. In addition, strategies that support the activity of T cells in the tumor microenvironment have been developed. These represent a unique opportunity to ensure durable T cell activity upon vaccination. Here, we comprehensively review recent progress in mRNA-based neo-antigen vaccines, summarizing critical milestones that made it possible to bring the promise of therapeutic cancer vaccines within reach.
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Affiliation(s)
| | | | | | | | | | - Karine Breckpot
- Laboratory for Molecular and Cellular Therapy (LMCT), Department of Biomedical Sciences, Vrije Universiteit Brussel, B-1090 Brussels, Belgium; (A.E.); (W.d.M.); (R.B.S.); (K.T.); (L.F.)
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10
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Balhorn R, Balhorn MC. Therapeutic applications of the selective high affinity ligand drug SH7139 extend beyond non-Hodgkin's lymphoma to many other types of solid cancers. Oncotarget 2020; 11:3315-3349. [PMID: 32934776 PMCID: PMC7476732 DOI: 10.18632/oncotarget.27709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 07/27/2020] [Indexed: 01/04/2023] Open
Abstract
SH7139, the first of a series of selective high affinity ligand (SHAL) oncology drug candidates designed to target and bind to the HLA-DR proteins overexpressed by B-cell lymphomas, has demonstrated exceptional efficacy in the treatment of Burkitt lymphoma xenografts in mice and a safety profile that may prove to be unprecedented for an oncology drug. The aim of this study was to determine how frequently the HLA-DRs targeted by SH7139 are expressed by different subtypes of non-Hodgkin’s lymphoma and by other solid cancers that have been reported to express HLA-DR. Binding studies conducted with SH7129, a biotinylated analog of SH7139, reveal that more than half of the biopsy sections obtained from patients with different types of non-Hodgkin’s lymphoma express the HLA-DRs targeted by SH7139. Similar analyses of tumor biopsy tissue obtained from patients diagnosed with eighteen other solid cancers show the majority of these tumors also express the HLA-DRs targeted by SH7139. Cervical, ovarian, colorectal and prostate cancers expressed the most HLA-DR. Only a few esophageal and head and neck tumors bound the diagnostic. Within an individual’s tumor, cell to cell differences in HLA-DR target expression varied by only 2 to 3-fold while the expression levels in tumors obtained from different patients varied as much as 10 to 100-fold. The high frequency with which SH7129 was observed to bind to these cancers suggests that many patients diagnosed with B-cell lymphomas, myelomas, and other non-hematological cancers should be considered potential candidates for new therapies such as SH7139 that target HLA-DR-expressing tumors.
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Affiliation(s)
- Rod Balhorn
- SHAL Technologies Inc., Livermore, CA 94550, USA
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11
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Song Y, Song W, Li Z, Song W, Wen Y, Li J, Xia Q, Zhang M. CDC27 Promotes Tumor Progression and Affects PD-L1 Expression in T-Cell Lymphoblastic Lymphoma. Front Oncol 2020; 10:488. [PMID: 32391258 PMCID: PMC7190811 DOI: 10.3389/fonc.2020.00488] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/18/2020] [Indexed: 12/20/2022] Open
Abstract
T-lymphoblastic lymphoma (T-LBL) is a rare hematological malignancy with highly aggressive, unique clinical manifestations, and poor prognosis. Cell division cycle 27 (CDC27) was previously reported to be a significant subunit of the anaphase-promoting complex/cyclosome. However, the specific functions and relevant mechanisms of CDC27 in T-LBL remain unknown. Through immunohistochemistry staining, we identified that CDC27 was overexpressed in T-LBL tissues and related to tumor progression and poor survival. Functional experiments demonstrated that CDC27 promoted proliferation in vivo and in vitro. Further experiment suggested the role of CDC27 in facilitating G1/S transition and promoting the expression of Cyclin D1 and CDK4. Then the effect of CDC27 in inhibiting apoptosis was also identified. Furthermore, we found a positive correlation between the expression of CDC27 and Programmed death ligand-1 (PD-L1) by immunohistochemistry staining. The interaction between CDC27 and PD-L1 was also proved by western blot, luciferase gene reporter assay and immunofluorescence. Taken together, our results showed that CDC27 contributes to T-LBL progression and there is a positive correlation between PD-L1 and CDC27, which offers novel perspectives for future studies on targeting CDC27 in T-LBL.
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Affiliation(s)
- Yue Song
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,The Academy of Medical Science of Zhengzhou University, Zhengzhou, China.,Lymphoma Diagnosis and Treatment Center of Henan Province, Zhengzhou, China
| | - Wei Song
- Department of Pathology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Zhaoming Li
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Lymphoma Diagnosis and Treatment Center of Henan Province, Zhengzhou, China
| | - Wenting Song
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,The Academy of Medical Science of Zhengzhou University, Zhengzhou, China.,Lymphoma Diagnosis and Treatment Center of Henan Province, Zhengzhou, China
| | - Yibo Wen
- The Academy of Medical Science of Zhengzhou University, Zhengzhou, China
| | - Jiwei Li
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Lymphoma Diagnosis and Treatment Center of Henan Province, Zhengzhou, China
| | - Qingxin Xia
- Department of Pathology, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Mingzhi Zhang
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Lymphoma Diagnosis and Treatment Center of Henan Province, Zhengzhou, China
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12
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Ma M, Liu J, Jin S, Wang L. Development of tumour peptide vaccines: From universalization to personalization. Scand J Immunol 2020; 91:e12875. [PMID: 32090366 DOI: 10.1111/sji.12875] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/08/2020] [Accepted: 02/20/2020] [Indexed: 12/19/2022]
Abstract
In recent years, relying on the human immune system to kill tumour cells has become an effective means of cancer treatment. The development of peptide vaccines, which not only break the immune tolerance of a tumour but also attack malignant cells via specific antitumour immunity, has received increased attention in tumour immunization therapy due to their safety and easy preparation. The use of large-scale sequencing technology enables the continuous discovery of new tumour antigens. With improved accuracy of epitope prediction by computer simulation and the usage of a tetramer assay, cytotoxic lymphocyte epitopes can be screened and identified more easily. Transmembrane peptide and nanoparticle technologies promote more effective intake and delivery of antigens. Consequently, considerable evolution from universal to personalized peptide vaccines has taken place, and such vaccines induce an efficient and specific immune response targeting tumour neoantigens. Recently, genomic analysis and bioinformatics approaches have greatly facilitated the breakthrough of personalized peptide vaccines targeting neoantigens, resulting in a renewed interest in this field. Further, the combination of tumour peptide vaccines with checkpoint blockades may improve patient outcomes. In this review, we discuss the development of tumour peptide vaccines and the new technological progress, from universalization to personalization, to highlight the substantial promise of tumour peptide vaccines in clinical cancer immunotherapy.
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Affiliation(s)
- Minjun Ma
- Department of Gastrology, The First People's Hospital of Fuyang of Hangzhou, Hangzhou, China
| | - Jingwen Liu
- Laboratory of Gastroenterology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Shenghang Jin
- Department of Laboratory Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Lan Wang
- Linhai Center for Disease Control and Prevention, Linhai, China
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13
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Abstract
After more than a century of efforts to establish cancer immunotherapy in clinical practice, the advent of checkpoint inhibition (CPI) therapy was a critical breakthrough toward this direction (Hodi et al. in Cell Rep 13(2):412-424, 2010; Wolchok et al. in N Engl J Med 369(2):122-133, 2013; Herbst et al. in Nature 515(7528):563-567, 2014; Tumeh et al. in Nature 515(7528):568-571, 2014). Further, CPIs shifted the focus from long studied shared tumor-associated antigens to mutated ones. As cancer is caused by mutations in somatic cells, the concept to utilize these correlates of 'foreignness' to enable recognition and lysis of the cancer cell by T cell immunity seems an obvious thing to do.
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14
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Autoimmune disease in CMML-the chicken or the egg? Best Pract Res Clin Haematol 2019; 33:101136. [PMID: 32460986 DOI: 10.1016/j.beha.2019.101136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/09/2019] [Accepted: 12/10/2019] [Indexed: 12/14/2022]
Abstract
Chronic myelomonocytic leukemia (CMML) is a clonal disorder that is associated with a wide range of systemic inflammatory and autoimmune diseases (SIADs). Approximately 20% of patients with CMML will have an associated SIAD and recognizing this association is critical to the evaluation, prognostication and management of patients with CMML. In this paper, we review the evidence supporting a causative link between these two entities as well as the direction of this relationship. We argue that the data favors CMML as the antecedent and causative disease state with a few notable exceptions. Better understanding of this relationship aids clinicians in the education of their patients and in determining the optimal management approach at the bedside. It is important to recognize opportunities to harmonize the treatments of these disease processes, which may enhance the effectiveness of treatment while reducing the burden of adverse effects from redundant therapies.
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15
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Buetow KH, Meador LR, Menon H, Lu YK, Brill J, Cui H, Roe DJ, DiCaudo DJ, Hastings KT. High GILT Expression and an Active and Intact MHC Class II Antigen Presentation Pathway Are Associated with Improved Survival in Melanoma. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2019; 203:2577-2587. [PMID: 31591149 PMCID: PMC6832889 DOI: 10.4049/jimmunol.1900476] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 09/16/2019] [Indexed: 02/07/2023]
Abstract
The MHC class I Ag presentation pathway in melanoma cells has a well-established role in immune-mediated destruction of tumors. However, the clinical significance of the MHC class II Ag presentation pathway in melanoma cells is less clear. In Ag-presenting cells, IFN-γ-inducible lysosomal thiol reductase (GILT) is critical for MHC class II-restricted presentation of multiple melanoma Ags. Although not expressed in benign melanocytes of nevi, GILT and MHC class II expression is induced in malignant melanocytes in a portion of melanoma specimens. Analysis of The Cancer Genome Atlas cutaneous melanoma data set showed that high GILT mRNA expression was associated with improved overall survival. Expression of IFN-γ, TNF-α, and IL-1β was positively associated with GILT expression in melanoma specimens. These cytokines were capable of inducing GILT expression in human melanoma cells in vitro. GILT protein expression in melanocytes was induced in halo nevi, which are nevi undergoing immune-mediated regression, and is consistent with the association of GILT expression with improved survival in melanoma. To explore potential mechanisms of GILT's association with patient outcome, we investigated pathways related to GILT function and expression. In contrast to healthy skin specimens, in which the MHC class II pathway was nearly uniformly expressed and intact, there was substantial variation in the MHC class II pathway in the The Cancer Genome Atlas melanoma specimens. Both an active and intact MHC class II pathway were associated with improved overall survival in melanoma. These studies support a role for GILT and the MHC class II Ag presentation pathway in melanoma outcome.
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Affiliation(s)
- Kenneth H Buetow
- School of Life Sciences, Arizona State University, Tempe, AZ 85281
| | - Lydia R Meador
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ 85004
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724
| | - Hari Menon
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ 85004
| | - Yih-Kuang Lu
- School of Life Sciences, Arizona State University, Tempe, AZ 85281
| | - Jacob Brill
- School of Life Sciences, Arizona State University, Tempe, AZ 85281
| | - Haiyan Cui
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724
| | - Denise J Roe
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724
- Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85724; and
| | | | - K Taraszka Hastings
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ 85004;
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724
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16
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Chen L, Qiao D, Wang J, Tian G, Wang M. Cancer immunotherapy with lymphocytes genetically engineered with T cell receptors for solid cancers. Immunol Lett 2019; 216:51-62. [PMID: 31597088 DOI: 10.1016/j.imlet.2019.10.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 09/18/2019] [Accepted: 10/02/2019] [Indexed: 12/15/2022]
Abstract
Adoptive transfer of T cells genetically engineered with chimeric antigen receptors (CAR-T cells) have proven to be highly effective for treating CD19+ B cell-derived hematologic malignancies. However, due to the lack of ideal tumor surface antigens, CAR-T cell therapy has limited success in treating solid tumors. T cells genetically engineered with T cell receptors (TCR-T cells) recognize intracellular and cell-surface antigens in the context of major histocompatibility complex (MHC) presentation and thus have the potential to access much more target antigens than CAR-T cells, providing great promise in treating solid tumors. There is an increasing interest in the application of TCR-T cell therapy for solid tumors, and fifty-six clinical trials are undergoing worldwide to confirm its validity. In this review, we summarize the recent progress in clinical studies of TCR-T cell therapy, describe strategies in the preparation and characterization of TCR-T cells, focusing on antigen selection, TCR isolation and methods to further enhance the potency of adoptively transferred cells.
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Affiliation(s)
- Lei Chen
- Department of Research and Development, Shenzhen Institute for Innovation and Translational Medicine, Shenzhen International Biological Valley-Life Science Industrial Park, Dapeng New District, Shenzhen, China
| | - Dongjuan Qiao
- Department of Research and Development, Shenzhen Institute for Innovation and Translational Medicine, Shenzhen International Biological Valley-Life Science Industrial Park, Dapeng New District, Shenzhen, China
| | - Juntao Wang
- Department of Research and Development, Shenzhen Institute for Innovation and Translational Medicine, Shenzhen International Biological Valley-Life Science Industrial Park, Dapeng New District, Shenzhen, China
| | - Geng Tian
- Department of Oncology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, 518035, China
| | - Mingjun Wang
- Department of Research and Development, Shenzhen Institute for Innovation and Translational Medicine, Shenzhen International Biological Valley-Life Science Industrial Park, Dapeng New District, Shenzhen, China.
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17
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Xiu Y, Jiang G, Zhou S, Diao J, Liu H, Su B, Li C. Identification of Potential Immune-Related circRNA-miRNA-mRNA Regulatory Network in Intestine of Paralichthys olivaceus During Edwardsiella tarda Infection. Front Genet 2019; 10:731. [PMID: 31475036 PMCID: PMC6702444 DOI: 10.3389/fgene.2019.00731] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 07/11/2019] [Indexed: 12/20/2022] Open
Abstract
Olive flounder (Paralichthys olivaceus) is an important economical flatfish in Japan, Korea, and China, but its production has been greatly threatened by disease outbreaks. In this research, we aimed to explore the immune responsive mechanism of P. olivaceus against Edwardsiella tarda infection by profiling the expression of circRNA, miRNA, and mRNA by RNA-seq and constructing a regulatory circular circRNA–miRNA–mRNA network. Illumina sequencing of samples from normal control (H0), 2 h (H2), 8 h (H8), and 12 h (H12) post-challenge was conducted. Differentially expressed (DE) circRNA (DE–circRNAs), miRNAs (DE–miRNAs), and mRNAs [differential expression genes (DEGs)] between challenge and control groups were identified, resulting in a total of 62 DE–circRNAs, 39 DE–miRNAs, and 3,011 DEGs. Based on the differentially expressed gene results, miRNA target interactions (circRNA–miRNA pairs and miRNA–mRNA pairs) were predicted by MiRanda software. Once these paired were combined, a preliminary circRNA–miRNA–mRNA network was generated with 198 circRNA–miRNA edges and 3,873 miRNA–mRNA edges, including 44 DE–circRNAs, 32 DE–miRNAs, and 1,774 DEGs. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was performed to evaluate the function of the DEGs in this network, and we focused and identified two important intestinal immune pathways (herpes simplex infection and intestinal immune network for IgA production) that showed statistical significance between the challenge and control groups. Furthermore, three critical DEGs (nectin2, MHC II α-chain, and MHC II β-chain) were identified, mapped into the preliminary circRNA–miRNA–mRNA network, and new circRNA–miRNA–mRNA regulatory networks were constructed. In conclusion, we, for the first time, identified circRNA–miRNA–mRNA network from P. olivaceus in the pathogenesis of E. tarda and provided valuable resources for further analyses of the molecular mechanisms and signaling networks.
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Affiliation(s)
- Yunji Xiu
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China.,Shandong Key Laboratory of Disease Control in Mariculture, Marine Biology Institute of Shandong Province, Qingdao, China
| | - Guangpeng Jiang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Shun Zhou
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Jing Diao
- Shandong Key Laboratory of Disease Control in Mariculture, Marine Biology Institute of Shandong Province, Qingdao, China
| | - Hongjun Liu
- Shandong Key Laboratory of Disease Control in Mariculture, Marine Biology Institute of Shandong Province, Qingdao, China
| | - Baofeng Su
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, United Statess
| | - Chao Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
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18
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Chow IT, Gates TJ, Papadopoulos GK, Moustakas AK, Kolawole EM, Notturno RJ, McGinty JW, Torres-Chinn N, James EA, Greenbaum C, Nepom GT, Evavold BD, Kwok WW. Discriminative T cell recognition of cross-reactive islet-antigens is associated with HLA-DQ8 transdimer-mediated autoimmune diabetes. SCIENCE ADVANCES 2019; 5:eaaw9336. [PMID: 31457096 PMCID: PMC6703875 DOI: 10.1126/sciadv.aaw9336] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 07/11/2019] [Indexed: 05/04/2023]
Abstract
Human leukocyte antigen (HLA)-DQ8 transdimer (HLA-DQA1*0501/DQB1*0302) confers exceptionally high risk in autoimmune diabetes. However, little is known about HLA-DQ8 transdimer-restricted CD4 T cell recognition, an event crucial for triggering HLA-DQ8 transdimer-specific anti-islet immunity. Here, we report a high degree of epitope overlap and T cell promiscuity between susceptible HLA-DQ8 and HLA-DQ8 transdimer. Despite preservation of putative residues for T cell receptor (TCR) contact, stronger disease-associated responses to cross-reactive, immunodominant islet epitopes are elicited by HLA-DQ8 transdimer. Mutagenesis at the α chain of HLA-DQ8 transdimer in complex with the disease-relevant GAD65250-266 peptide and in silico analysis reveal the DQ α52 residue located within the N-terminal edge of the peptide-binding cleft for the enhanced T cell reactivity, altering avidity and biophysical affinity between TCR and HLA-peptide complexes. Accordingly, a structurally promiscuous but nondegenerate TCR-HLA-peptide interface is pivotal for HLA-DQ8 transdimer-mediated autoimmune diabetes.
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Affiliation(s)
- I-Ting Chow
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - Theresa J. Gates
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - George K. Papadopoulos
- Laboratory of Biophysics, Biochemistry, Bioprocessing and Bioproducts, Faculty of Agricultural Technology, Technological Educational Institute of Epirus, GR47100 Arta, Greece
| | - Antonis K. Moustakas
- Department of Food Technology, Ionian University, GR28100 Argostoli, Cephallonia, Greece
| | - Elizabeth M. Kolawole
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
| | - Richard J. Notturno
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - John W. McGinty
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - Nadia Torres-Chinn
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - Eddie A. James
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - Carla Greenbaum
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
| | - Gerald T. Nepom
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
- Department of Immunology, University of Washington, Seattle, WA 98195, USA
| | - Brian D. Evavold
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
| | - William W. Kwok
- Benaroya Research Institute at Virginia Mason, 1201 9th Ave., Seattle, WA 98101, USA
- Department of Medicine, University of Washington, Seattle, WA 98195, USA
- Corresponding author.
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19
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Wen F, Smith MR, Zhao H. Construction and Screening of an Antigen-Derived Peptide Library Displayed on Yeast Cell Surface for CD4+ T Cell Epitope Identification. Methods Mol Biol 2019; 2024:213-234. [PMID: 31364052 DOI: 10.1007/978-1-4939-9597-4_13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Antigenic peptides (termed T cell epitopes) are assembled with major histocompatibility complex (MHC) molecules and presented on the surface of antigen-presenting cells (APCs) for T cell recognition. T cells engage these peptide-MHCs using T cell receptors (TCRs). Because T cell epitopes determine the specificity of a T cell immune response, their prediction and identification are important steps in developing peptide-based vaccines and immunotherapies. In recent years, a number of computational methods have been developed to predict T cell epitopes by evaluating peptide-MHC binding; however, the success of these methods has been limited for MHC class II (MHCII) due to the structural complexity of MHCII antigen presentation. Moreover, while peptide-MHC binding is a prerequisite for a T cell epitope, it alone is not sufficient. Therefore, T cell epitope identification requires further functional verification of the MHC-binding peptide using professional APCs, which are difficult to isolate, expand, and maintain. To address these issues, we have developed a facile, accurate, and high-throughput method for T cell epitope mapping by screening antigen-derived peptide libraries in complex with MHC protein displayed on yeast cell surface. Here, we use hemagglutinin and influenza A virus X31/A/Aichi/68 as examples to describe the key steps in identification of CD4+ T cell epitopes from a single antigenic protein and the entire genome of a pathogen, respectively. Methods for single-chain peptide MHC vector design, yeast surface display, peptide library generation in Escherichia coli, and functional screening in Saccharomyces cerevisiae are discussed.
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Affiliation(s)
- Fei Wen
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Mason R Smith
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Huimin Zhao
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Department of Chemistry, Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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20
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Abstract
This review discusses the rapidly evolving field of immunotherapy research, focusing on the types of cancer antigens that can be recognised by the immune system and potential methods by which neoantigens can be exploited clinically to successfully target and clear tumour cells. Recent studies suggest that the likelihood of successful immunotherapeutic targeting of cancer will be reliant on immune response to neoantigens. This type of cancer-specific antigen arises from somatic variants that result in alteration of the expressed protein sequence. Massively parallel sequencing techniques now allow the rapid identification of these genomic mutations, and algorithms can be used to predict those that will be processed by the proteasome, bind to the transporter complex and encode peptides that bind strongly to individual MHC molecules. The emerging data from assessment of the immunogenicity of neoantigens suggests that only a minority of mutations will form targetable epitopes and therefore the potential for immunotherapeutic targeting will be greater in cancers with a higher frequency of protein-altering somatic variants. It is evident that neoantigens contribute to the success of some immunotherapeutic interventions and that there is significant scope for specific targeting of these antigens to develop new treatment approaches.
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Affiliation(s)
- Antonia L Pritchard
- Genetics and Immunology Research Group, An Lòchran, 10 Inverness Campus, Inverness, IV2 5NA, Scotland, UK.
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21
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Hutchison S, Pritchard AL. Identifying neoantigens for use in immunotherapy. Mamm Genome 2018; 29:714-730. [PMID: 30167844 PMCID: PMC6267674 DOI: 10.1007/s00335-018-9771-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 08/08/2018] [Indexed: 12/14/2022]
Abstract
This review focuses on the types of cancer antigens that can be recognised by the immune system and form due to alterations in the cancer genome, including cancer testis, overexpressed and neoantigens. Specifically, neoantigens can form when cancer cell-specific mutations occur that result in alterations of the protein from ‘self’. This type of antigen can result in an immune response sufficient to clear tumour cells when activated. Furthermore, studies have reported that the likelihood of successful immunotherapeutic targeting of cancer by many different methods was reliant on immune response to neoantigens. The recent resurgence of interest in the immune response to tumour cells, in conjunction with technological advances, has resulted in a large increase in the predicted, identified and functionally confirmed neoantigens. This growth in identified neoantigen sequences has increased the contents of training sets for algorithms, which in turn improves the prediction of which genetic mutations may form neoantigens. Additionally, algorithms predicting how proteins will be processed into peptide epitopes by the proteasome and which peptides bind to the transporter complex are also improving with this research. Now that large screens of all the tumour-specific protein altering mutations are possible, the emerging data from assessment of the immunogenicity of neoantigens suggest that only a minority of variants will form targetable epitopes. The potential for immunotherapeutic targeting of neoantigens will therefore be greater in cancers with a higher frequency of protein altering somatic variants. There is considerable potential in the use of neoantigens to treat patients, either alone or in combination with other immunotherapies and with continued advancements, these potentials will be realised.
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Affiliation(s)
- Sharon Hutchison
- Genetics and Immunology Research Group, University of the Highlands and Islands, An Lòchran, 10 Inverness Campus, Inverness, IV2 5NA, Scotland, UK
| | - Antonia L Pritchard
- Genetics and Immunology Research Group, University of the Highlands and Islands, An Lòchran, 10 Inverness Campus, Inverness, IV2 5NA, Scotland, UK.
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22
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Abstract
The question of whether human tumors express antigens that can be recognized by the immune system has been answered with a resounding YES. Most were identified through spontaneous antitumor humoral and cellular immune responses found in cancer patients and include peptides, glycopeptides, phosphopeptides, viral peptides, and peptides resulting from common mutations in oncogenes and tumor-suppressor genes, or common gene fusion events. Many have been extensively tested as candidates for anticancer vaccines. More recently, attention has been focused on the potentially large number of unique tumor antigens, mutated neoantigens, that are the predicted products of the numerous mutations revealed by exome sequencing of primary tumors. Only a few have been confirmed as targets of spontaneous immunity and immunosurveillance, and even fewer have been tested in preclinical and clinical settings. The field has been divided for a long time on the relative importance of shared versus mutated antigens in tumor surveillance and as candidates for vaccines. This question will eventually need to be answered in a head to head comparison in well-designed clinical trials. One advantage that shared antigens have over mutated antigens is their potential to be used in vaccines for primary cancer prevention. Cancer Immunol Res; 5(5); 347-54. ©2017 AACR.
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Affiliation(s)
- Olivera J Finn
- Department of Immunology, University of Pittsburgh School of Medicine and the University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania.
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23
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Durgeau A, Virk Y, Corgnac S, Mami-Chouaib F. Recent Advances in Targeting CD8 T-Cell Immunity for More Effective Cancer Immunotherapy. Front Immunol 2018; 9:14. [PMID: 29403496 PMCID: PMC5786548 DOI: 10.3389/fimmu.2018.00014] [Citation(s) in RCA: 310] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/04/2018] [Indexed: 12/18/2022] Open
Abstract
Recent advances in cancer treatment have emerged from new immunotherapies targeting T-cell inhibitory receptors, including cytotoxic T-lymphocyte associated antigen (CTLA)-4 and programmed cell death (PD)-1. In this context, anti-CTLA-4 and anti-PD-1 monoclonal antibodies have demonstrated survival benefits in numerous cancers, including melanoma and non-small-cell lung carcinoma. PD-1-expressing CD8+ T lymphocytes appear to play a major role in the response to these immune checkpoint inhibitors (ICI). Cytotoxic T lymphocytes (CTL) eliminate malignant cells through recognition by the T-cell receptor (TCR) of specific antigenic peptides presented on the surface of cancer cells by major histocompatibility complex class I/beta-2-microglobulin complexes, and through killing of target cells, mainly by releasing the content of secretory lysosomes containing perforin and granzyme B. T-cell adhesion molecules and, in particular, lymphocyte-function-associated antigen-1 and CD103 integrins, and their cognate ligands, respectively, intercellular adhesion molecule 1 and E-cadherin, on target cells, are involved in strengthening the interaction between CTL and tumor cells. Tumor-specific CTL have been isolated from tumor-infiltrating lymphocytes and peripheral blood lymphocytes (PBL) of patients with varied cancers. TCRβ-chain gene usage indicated that CTL identified in vitro selectively expanded in vivo at the tumor site compared to autologous PBL. Moreover, functional studies indicated that these CTL mediate human leukocyte antigen class I-restricted cytotoxic activity toward autologous tumor cells. Several of them recognize truly tumor-specific antigens encoded by mutated genes, also known as neoantigens, which likely play a key role in antitumor CD8 T-cell immunity. Accordingly, it has been shown that the presence of T lymphocytes directed toward tumor neoantigens is associated with patient response to immunotherapies, including ICI, adoptive cell transfer, and dendritic cell-based vaccines. These tumor-specific mutation-derived antigens open up new perspectives for development of effective second-generation therapeutic cancer vaccines.
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Affiliation(s)
- Aurélie Durgeau
- INSERM UMR 1186, Integrative Tumor Immunology and Genetic Oncology, Gustave Roussy, EPHE, Fac. de Médecine - Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France.,ElyssaMed, Paris Biotech Santé, Paris, France
| | - Yasemin Virk
- INSERM UMR 1186, Integrative Tumor Immunology and Genetic Oncology, Gustave Roussy, EPHE, Fac. de Médecine - Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
| | - Stéphanie Corgnac
- INSERM UMR 1186, Integrative Tumor Immunology and Genetic Oncology, Gustave Roussy, EPHE, Fac. de Médecine - Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
| | - Fathia Mami-Chouaib
- INSERM UMR 1186, Integrative Tumor Immunology and Genetic Oncology, Gustave Roussy, EPHE, Fac. de Médecine - Univ. Paris-Sud, Université Paris-Saclay, Villejuif, France
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24
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Rao M, Zhenjiang L, Meng Q, Sinclair G, Dodoo E, Maeurer M. Mutant Epitopes in Cancer. Oncoimmunology 2017. [DOI: 10.1007/978-3-319-62431-0_4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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25
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Bräunlein E, Krackhardt AM. Identification and Characterization of Neoantigens As Well As Respective Immune Responses in Cancer Patients. Front Immunol 2017; 8:1702. [PMID: 29250075 PMCID: PMC5714868 DOI: 10.3389/fimmu.2017.01702] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 11/17/2017] [Indexed: 12/16/2022] Open
Abstract
Cancer immunotherapy has recently emerged as a powerful tool for the treatment of diverse advanced malignancies. In particular, therapeutic application of immune checkpoint modulators, such as anti-CTLA4 or anti-PD-1/PD-L1 antibodies, have shown efficacy in a broad range of malignant diseases. Although pharmacodynamics of these immune modulators are complex, recent studies strongly support the notion that altered peptide ligands presented on tumor cells representing neoantigens may play an essential role in tumor rejection by T cells activated by anti-CTLA4 and anti-PD-1 antibodies. Neoantigens may have diverse sources as viral and mutated proteins. Moreover, posttranslational modifications and altered antigen processing may also contribute to the neoantigenic peptide ligand landscape. Different approaches of target identification are currently applied in combination with subsequent characterization of autologous and non-self T-cell responses against such neoantigens. Additional efforts are required to elucidate key characteristics and interdependences of neoantigens, immunodominance, respective T-cell responses, and the tumor microenvironment in order to define decisive determinants involved in effective T-cell-mediated tumor rejection. This review focuses on our current knowledge of identification and characterization of such neoantigens as well as respective T-cell responses. It closes with challenges to be addressed in future relevant for further improvement of immunotherapeutic strategies in malignant diseases.
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Affiliation(s)
- Eva Bräunlein
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Angela M Krackhardt
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,German Cancer Consortium of Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
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Bräunlein E, Krackhardt AM. Tools to define the melanoma-associated immunopeptidome. Immunology 2017; 152:536-544. [PMID: 28755382 DOI: 10.1111/imm.12803] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 07/25/2017] [Accepted: 07/25/2017] [Indexed: 12/26/2022] Open
Abstract
Immunotherapies have been traditionally applied in malignant melanoma, which represent one of the most immunogenic tumours. Recently, immune checkpoint modulation has shown high therapeutic efficacy and may provide long-term survival in a significant proportion of affected patients. T cells are the major players in tumour rejection and recognize tumour cells predominantly in an MHC-dependent way. The immunopeptidome comprises the peptide repertoire presented by MHC class I and II molecules on the surface of the body's cells including tumour cells. To understand characteristics of suitable rejection antigens as well as respective effective T-cell responses, determination of the immunopeptidome is of utmost importance. Suitable rejection antigens need to be further characterized and validated not only to systematically improve current therapeutic approaches, but also to develop individualized treatment options. In this review, we report on current tools to explore the immunopeptidome in human melanoma and discuss current understanding and future developments to specifically detect and select those antigens that may be most relevant and promising for effective tumour rejection.
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Affiliation(s)
- Eva Bräunlein
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Angela M Krackhardt
- Medizinische Klinik III, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,German Cancer Consortium of Translational Cancer Research (DKTK) and German Cancer Research Centre (DKFZ), Heidelberg, Germany
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27
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Jia H, Truica CI, Wang B, Wang Y, Ren X, Harvey HA, Song J, Yang JM. Immunotherapy for triple-negative breast cancer: Existing challenges and exciting prospects. Drug Resist Updat 2017; 32:1-15. [PMID: 29145974 DOI: 10.1016/j.drup.2017.07.002] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 07/17/2017] [Accepted: 07/20/2017] [Indexed: 12/21/2022]
Abstract
Patients with breast tumors that do not express the estrogen receptor, the progesterone receptor, nor Her-2/neu are hence termed "triple negatives", and generally have a poor prognosis, with high rates of systemic recurrence and refractoriness to conventional therapy regardless of the choice of adjuvant treatment. Thus, more effective therapeutic options are sorely needed for triple-negative breast cancer (TNBC), which occurs in approximately 20% of diagnosed breast cancers. In recent years, exploiting intrinsic mechanisms of the host immune system to eradicate cancer cells has achieved impressive success, and the advances in immunotherapy have yielded potential new therapeutic strategies for the treatment of this devastating subtype of breast cancer. It is anticipated that the responses initiated by immunotherapeutic interventions will explicitly target and annihilate tumor cells, while at the same time spare normal cells. Various immunotherapeutic approaches have been already developed and tested, which include the blockade of immune checkpoints using neutralizing or blocking antibodies, induction of cytotoxic T lymphocytes (CTLs), adoptive cell transfer-based therapy, and modulation of the tumor microenvironment to enhance the activity of CTLs. One of the most important areas of breast cancer research today is understanding the immune features and profiles of TNBC and devising novel immune-modulatory strategies to tackling TNBC, a subtype of breast cancer notorious for its poor prognosis and its imperviousness to conventional treatments. On the optimal side, one can anticipate that novel, effective, and personalized immunotherapy for TNBC will soon achieve more success and impact clinical treatment of this disease which afflicts approximately 20% of patients with breast cancer. In the present review, we highlight the current progress and encouraging developments in cancer immunotherapy, with a goal to discuss the challenges and to provide future perspectives on how to exploit a variety of new immunotherapeutic approaches including checkpoint inhibitors and neoadjuvant immunotherapy for the treatment of patients with TNBC.
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Affiliation(s)
- Hongyan Jia
- Department of General Surgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, 03001, China.
| | - Cristina I Truica
- Department of Medicine, The Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Bin Wang
- Department of General Surgery, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, 03001, China
| | - Yanhong Wang
- Department of Microbiology and Immunology, Shanxi Medical University, Taiyuan, Shanxi, 03001, China
| | - Xingcong Ren
- Department of Pharmacology, The Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Harold A Harvey
- Department of Medicine, The Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Jianxun Song
- Department of Microbiology and Immunology, The Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Jin-Ming Yang
- Department of Pharmacology, The Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
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Capietto AH, Jhunjhunwala S, Delamarre L. Characterizing neoantigens for personalized cancer immunotherapy. Curr Opin Immunol 2017; 46:58-65. [PMID: 28478383 DOI: 10.1016/j.coi.2017.04.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/17/2017] [Indexed: 12/18/2022]
Abstract
Somatic mutations can generate neoantigens that are presented on MHC molecules and drive effective T cells responses against cancer. Mutation load in cancer patients predicts response to immune checkpoint blockade therapy. Additionally, vaccination targeting neoantigens controls established tumor growth in preclinical models. These recent findings led to a renewed interest in the field of cancer vaccines and the development of antigen-targeted cancer immunotherapies. However, targeting neoantigens is challenging, as most mutations are unique to each cancer patient. In addition, only a small fraction of the mutations are immunogenic and therefore their accurate prediction is critical. In this review, we discuss the properties of neoantigens that influence their immunogenicity, along with questions that remain to be addressed in order to improve prediction algorithms.
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Cui Y, Hill AW. Atopy and Specific Cancer Sites: a Review of Epidemiological Studies. Clin Rev Allergy Immunol 2017; 51:338-352. [PMID: 27277132 DOI: 10.1007/s12016-016-8559-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mounting evidence appears to link asthma and atopy to cancer susceptibility. This review presents and discusses published epidemiological studies on the association between site-specific cancers and atopy. PubMed was searched electronically for publications between 1995 and 2015, and cited references were researched manually. Quantitative studies relating to atopy, allergy, or asthma and cancer were identified and tabulated. Despite many exposure-related limitations, patterns in the studies were observed. Asthma, specifically, has been observed to be a risk factor for lung cancer. A protective effect of atopic diseases against pancreatic cancer has been shown consistently in case-control studies but not in cohort studies. Allergy of any type appears to be protective against glioma and adult acute lymphoblastic leukemia. Most studies on atopic diseases and non-Hodgkin lymphoma or colorectal cancer reported an inverse association. The other sites identified had varying and non-significant outcomes. Further research should be dedicated to carefully defined exposure assessments of "atopy" as well as the biological plausibility in the association between atopic diseases and cancer.
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Affiliation(s)
- Yubao Cui
- Department of Clinical Laboratory, The Third People's Hospital of Yancheng, Affiliated Yancheng Hospital, School of Medicine, Southeast University, No. 299 at Jiefangnan Road, Yancheng, 224000, Jiangsu Province, China.
| | - Andrew W Hill
- Department of Epidemiology and Biostatistics, School of Public Health and Health Services, The George Washington University, Washington, DC, 20052, USA
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Abstract
Harnessing the immune system to eradicate malignant cells is becoming a most powerful new approach to cancer therapy. FDA approval of the immunotherapy-based drugs, sipuleucel-T (Provenge), ipilimumab (Yervoy, anti-CTLA-4), and more recently, the programmed cell death (PD)-1 antibody (pembrolizumab, Keytruda), for the treatment of multiple types of cancer has greatly advanced research and clinical studies in the field of cancer immunotherapy. Furthermore, recent clinical trials, using NY-ESO-1-specific T cell receptor (TCR) or CD19-chimeric antigen receptor (CAR), have shown promising clinical results for patients with metastatic cancer. Current success of cancer immunotherapy is built upon the work of cancer antigens and co-inhibitory signaling molecules identified 20 years ago. Among the large numbers of target antigens, CD19 is the best target for CAR T cell therapy for blood cancer, but CAR-engineered T cell immunotherapy does not yet work in solid cancer. NY-ESO-1 is one of the best targets for TCR-based immunotherapy in solid cancer. Despite the great success of checkpoint blockade therapy, more than 50% of cancer patients fail to respond to blockade therapy. The advent of new technologies such as next-generation sequencing has enhanced our ability to search for new immune targets in onco-immunology and accelerated the development of immunotherapy with potentially broader coverage of cancer patients. In this review, we will discuss the recent progresses of cancer immunotherapy and novel strategies in the identification of new immune targets and mutation-derived antigens (neoantigens) for cancer immunotherapy and immunoprecision medicine.
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Affiliation(s)
- Rong-Fu Wang
- Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, TX 77030, USA
- Department of Microbiology and Immunology, Weill Cornell Medicine, Cornell University, New York, NY 10065, USA
- Institute of Biosciences and Technology, College of Medicine, Texas A & M University, Houston, Texas 77030, USA
| | - Helen Y Wang
- Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, TX 77030, USA
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Affiliation(s)
- Rong-Fu Wang
- Center for Inflammation and Epigenetics, Houston Methodist Research Institute, Houston, TX 77030, USA
- Department of Microbiology and Immunology, Weill Cornell Medical College, Cornell University, New York, NY 10065, USA
- Institute of Biosciences and Technology, College of Medicine, Texas A & M University, Houston, Texas 77030, USA
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Bobisse S, Foukas PG, Coukos G, Harari A. Neoantigen-based cancer immunotherapy. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:262. [PMID: 27563649 DOI: 10.21037/atm.2016.06.17] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Emerging clinical evidence on the role of the antitumor activity of the immune system has generated great interest in immunotherapy in all cancer types. Recent clinical data clearly demonstrated that human tumor cells express antigenic peptides (epitopes) that can be recognized by autologous tumor-specific T cells and that enhancement of such immune reactivity can potentially lead to cancer control and cancer regression in patients with advanced disease. However, in most cases, it is unclear which tumor antigens (Ags) mediated cancer regression. Mounting evidence indicates that numerous endogenous mutated cancer proteins, a hallmark of tumor cells, can be processed into peptides and presented on the surface of tumor cells, leading to their immune recognition in vivo as "non-self" or foreign. Massively parallel sequencing has now overcome the challenge of rapidly identifying the comprehensive mutational spectrum of individual tumors (i.e., the "mutanome") and current technologies, as well as computational tools, have emerged that allow the identification of private epitopes derived from their mutanome and called neoantigens (neoAgs). On this basis, both CD4(+) and CD8(+) neoantigen-specific T cells have been identified in multiple human cancers and shown to be associated with a favorable clinical outcome. Notably, emerging data also indicate that neoantigen recognition represents a major factor in the activity of clinical immunotherapies. In the post-genome era, the mutanome holds promise as a long-awaited 'gold mine' for the discovery of unique cancer cell targets, which are exclusively tumor-specific and unlikely to drive immune tolerance, hence offering the chance for highly promising clinical programs of cancer immunotherapy.
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Affiliation(s)
- Sara Bobisse
- Ludwig Cancer Center and Department of Oncology, University of Lausanne, Lausanne, Switzerland;; Center of Experimental Therapeutics, University of Lausanne, Lausanne, Switzerland
| | - Periklis G Foukas
- Ludwig Cancer Center and Department of Oncology, University of Lausanne, Lausanne, Switzerland;; Center of Experimental Therapeutics, University of Lausanne, Lausanne, Switzerland;; 2nd Department of Pathology, National and Kapodistrian University of Athens, School of Medicine, Attikon University Hospital, Athens, Greece
| | - George Coukos
- Ludwig Cancer Center and Department of Oncology, University of Lausanne, Lausanne, Switzerland;; Center of Experimental Therapeutics, University of Lausanne, Lausanne, Switzerland
| | - Alexandre Harari
- Ludwig Cancer Center and Department of Oncology, University of Lausanne, Lausanne, Switzerland;; Center of Experimental Therapeutics, University of Lausanne, Lausanne, Switzerland
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Tsukahara T, Hirohashi Y, Kanaseki T, Nakatsugawa M, Kubo T, Sato N, Torigoe T. Peptide vaccination therapy: Towards the next generation. Pathol Int 2016; 66:547-553. [PMID: 27435148 DOI: 10.1111/pin.12438] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 06/14/2016] [Accepted: 06/24/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Tomohide Tsukahara
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
| | - Yoshihiko Hirohashi
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
| | - Takayuki Kanaseki
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
| | - Munehide Nakatsugawa
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
| | - Terufumi Kubo
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
| | - Noriyuki Sato
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
| | - Toshihiko Torigoe
- Department of PathologySapporo Medical University School of Medicine South‐1 West‐17, Chuo‐ku Sapporo Japan
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Tsukahara T, Emori M, Murata K, Mizushima E, Shibayama Y, Kubo T, Kanaseki T, Hirohashi Y, Yamashita T, Sato N, Torigoe T. The future of immunotherapy for sarcoma. Expert Opin Biol Ther 2016; 16:1049-57. [PMID: 27158940 DOI: 10.1080/14712598.2016.1188075] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION The use of immunotherapeutic challenges for sarcoma has a long history. Despite the existence of objective responses, immunotherapy has been overshadowed by the results of chemotherapy, especially for osteosarcoma. However, the prognosis for non-responders to chemotherapy is still poor and immunotherapy is now focused on again. AREAS COVERED We reviewed the following types of clinical trials of immunotherapy for sarcoma: (i) vaccination with autologous tumor cells, (ii) vaccination with peptides derived from tumor-associated antigens, (iii) adoptive cell transfer using engineered T cells expressing T cell receptor directed at NY-ESO-1 and (iv) immune checkpoint inhibitors targeting CTLA-4 and PD1/PDL1. EXPERT OPINION The immunogenicity of sarcoma might be lower than that of melanoma. Patients with small lesions who have not received any chemotherapy are good candidates for peptide-based immunotherapy. Combining peptide vaccination and immune checkpoint inhibitors is an attractive option, and long-lived memory T cells are attracting attention. Memory T stem cells defined by CD95+ are long-lived and have the capacity for self-renewal and multidifferentiation. We also identified a novel memory T cell population, young memory T cells defined by CD73+CXCR3+. Regulation of such memory T stem cells will be useful for peptide vaccination and adoptive cell transfer.
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Affiliation(s)
- Tomohide Tsukahara
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Makoto Emori
- b Department of Orthopaedic Surgery , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Kenji Murata
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan.,b Department of Orthopaedic Surgery , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Emi Mizushima
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan.,b Department of Orthopaedic Surgery , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Yuji Shibayama
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan.,b Department of Orthopaedic Surgery , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Terufumi Kubo
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Takayuki Kanaseki
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Yoshihiko Hirohashi
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Toshihiko Yamashita
- b Department of Orthopaedic Surgery , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Noriyuki Sato
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan
| | - Toshihiko Torigoe
- a Department of Pathology , Sapporo Medical University School of Medicine , Sapporo , Japan
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Türeci Ö, Vormehr M, Diken M, Kreiter S, Huber C, Sahin U. Targeting the Heterogeneity of Cancer with Individualized Neoepitope Vaccines. Clin Cancer Res 2016; 22:1885-96. [PMID: 27084742 DOI: 10.1158/1078-0432.ccr-15-1509] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/23/2016] [Indexed: 11/16/2022]
Abstract
Somatic mutations binding to the patient's MHC and recognized by autologous T cells (neoepitopes) are ideal cancer vaccine targets. They combine a favorable safety profile due to a lack of expression in healthy tissues with a high likelihood of immunogenicity, as T cells recognizing neoepitopes are not shaped by central immune tolerance. Proteins mutated in cancer (neoantigens) shared by patients have been explored as vaccine targets for many years. Shared ("public") mutations, however, are rare, as the vast majority of cancer mutations in a given tumor are unique for the individual patient. Recently, the novel concept of truly individualized cancer vaccination emerged, which exploits the vast source of patient-specific "private" mutations. Concurrence of scientific advances and technological breakthroughs enables the rapid, cost-efficient, and comprehensive mapping of the "mutanome," which is the entirety of somatic mutations in an individual tumor, and the rational selection of neoepitopes. How to transform tumor mutanome data to actionable knowledge for tailoring individualized vaccines "on demand" has become a novel research field with paradigm-shifting potential. This review gives an overview with particular focus on the clinical development of such vaccines.
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Affiliation(s)
- Özlem Türeci
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Mainz, Germany
| | | | - Mustafa Diken
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Mainz, Germany
| | - Sebastian Kreiter
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Mainz, Germany
| | - Christoph Huber
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Mainz, Germany
| | - Ugur Sahin
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Mainz, Germany. Research Center for Immunotherapy (FZI), Mainz, Germany. Biopharmaceutical New Technologies (BioNTech) Corporation, Mainz, Germany.
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Vormehr M, Diken M, Boegel S, Kreiter S, Türeci Ÿ, Sahin U. Mutanome directed cancer immunotherapy. Curr Opin Immunol 2016; 39:14-22. [DOI: 10.1016/j.coi.2015.12.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/01/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
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Mommen GPM, Marino F, Meiring HD, Poelen MCM, van Gaans-van den Brink JAM, Mohammed S, Heck AJR, van Els CACM. Sampling From the Proteome to the Human Leukocyte Antigen-DR (HLA-DR) Ligandome Proceeds Via High Specificity. Mol Cell Proteomics 2016; 15:1412-23. [PMID: 26764012 PMCID: PMC4824864 DOI: 10.1074/mcp.m115.055780] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Indexed: 12/12/2022] Open
Abstract
Comprehensive analysis of the complex nature of the Human Leukocyte Antigen (HLA) class II ligandome is of utmost importance to understand the basis for CD4+ T cell mediated immunity and tolerance. Here, we implemented important improvements in the analysis of the repertoire of HLA-DR-presented peptides, using hybrid mass spectrometry-based peptide fragmentation techniques on a ligandome sample isolated from matured human monocyte-derived dendritic cells (DC). The reported data set constitutes nearly 14 thousand unique high-confident peptides, i.e. the largest single inventory of human DC derived HLA-DR ligands to date. From a technical viewpoint the most prominent finding is that no single peptide fragmentation technique could elucidate the majority of HLA-DR ligands, because of the wide range of physical chemical properties displayed by the HLA-DR ligandome. Our in-depth profiling allowed us to reveal a strikingly poor correlation between the source proteins identified in the HLA class II ligandome and the DC cellular proteome. Important selective sieving from the sampled proteome to the ligandome was evidenced by specificity in the sequences of the core regions both at their N- and C- termini, hence not only reflecting binding motifs but also dominant protease activity associated to the endolysosomal compartments. Moreover, we demonstrate that the HLA-DR ligandome reflects a surface representation of cell-compartments specific for biological events linked to the maturation of monocytes into antigen presenting cells. Our results present new perspectives into the complex nature of the HLA class II system and will aid future immunological studies in characterizing the full breadth of potential CD4+ T cell epitopes relevant in health and disease.
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Affiliation(s)
- Geert P M Mommen
- From the ‡Institute for Translational Vaccinology, P.O. Box 450, 3720 AL Bilthoven, the Netherlands; §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Fabio Marino
- §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; ¶Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Hugo D Meiring
- From the ‡Institute for Translational Vaccinology, P.O. Box 450, 3720 AL Bilthoven, the Netherlands
| | - Martien C M Poelen
- ‖Centre for Infectious Disease Control, National Institute for Public Health and the Environment, P.O. Box 1, 3720 AL Bilthoven, the Netherlands
| | | | - Shabaz Mohammed
- §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; ¶Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, the Netherlands; **Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, OX13TA, Oxford, United Kingdom; ‡‡Department of Biochemistry, University of Oxford, South Parks Road, OX1 3QU, Oxford, United Kingdom
| | - Albert J R Heck
- §Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science Faculty, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; ¶Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Cécile A C M van Els
- ‖Centre for Infectious Disease Control, National Institute for Public Health and the Environment, P.O. Box 1, 3720 AL Bilthoven, the Netherlands;
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Lu YC, Robbins PF. Cancer immunotherapy targeting neoantigens. Semin Immunol 2015; 28:22-7. [PMID: 26653770 DOI: 10.1016/j.smim.2015.11.002] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Revised: 10/30/2015] [Accepted: 11/04/2015] [Indexed: 01/05/2023]
Abstract
Neoantigens are antigens encoded by tumor-specific mutated genes. Studies in the past few years have suggested a key role for neoantigens in cancer immunotherapy. Here we review the discoveries of neoantigens in the past two decades and the current advances in neoantigen identification. We also discuss the potential benefits and obstacles to the development of effective cancer immunotherapies targeting neoantigens.
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Affiliation(s)
- Yong-Chen Lu
- Surgery Branch, National Cancer Institute, National Institutes of Health, Building 10-CRC, Rm 3W-3864, 10 Center Dr, MSC 1201, Bethesda, MD 20892, United States.
| | - Paul F Robbins
- Surgery Branch, National Cancer Institute, National Institutes of Health, Building 10-CRC, Rm 3W-3864, 10 Center Dr, MSC 1201, Bethesda, MD 20892, United States.
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Van Allen EM, Miao D, Schilling B, Shukla SA, Blank C, Zimmer L, Sucker A, Hillen U, Foppen MHG, Goldinger SM, Utikal J, Hassel JC, Weide B, Kaehler KC, Loquai C, Mohr P, Gutzmer R, Dummer R, Gabriel S, Wu CJ, Schadendorf D, Garraway LA. Genomic correlates of response to CTLA-4 blockade in metastatic melanoma. Science 2015; 350:207-211. [PMID: 26359337 PMCID: PMC5054517 DOI: 10.1126/science.aad0095] [Citation(s) in RCA: 1976] [Impact Index Per Article: 219.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 08/27/2015] [Indexed: 12/12/2022]
Abstract
Monoclonal antibodies directed against cytotoxic T lymphocyte-associated antigen-4 (CTLA-4), such as ipilimumab, yield considerable clinical benefit for patients with metastatic melanoma by inhibiting immune checkpoint activity, but clinical predictors of response to these therapies remain incompletely characterized. To investigate the roles of tumor-specific neoantigens and alterations in the tumor microenvironment in the response to ipilimumab, we analyzed whole exomes from pretreatment melanoma tumor biopsies and matching germline tissue samples from 110 patients. For 40 of these patients, we also obtained and analyzed transcriptome data from the pretreatment tumor samples. Overall mutational load, neoantigen load, and expression of cytolytic markers in the immune microenvironment were significantly associated with clinical benefit. However, no recurrent neoantigen peptide sequences predicted responder patient populations. Thus, detailed integrated molecular characterization of large patient cohorts may be needed to identify robust determinants of response and resistance to immune checkpoint inhibitors.
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Affiliation(s)
- Eliezer M. Van Allen
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Diana Miao
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Bastian Schilling
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Sachet A. Shukla
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Christian Blank
- Department of Medical Oncology, Netherlands Cancer Institute, 1066 CX Amsterdam, Netherlands
| | - Lisa Zimmer
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Antje Sucker
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Uwe Hillen
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Marnix H. Geukes Foppen
- Department of Medical Oncology, Netherlands Cancer Institute, 1066 CX Amsterdam, Netherlands
| | - Simone M. Goldinger
- Department of Dermatology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Jochen Utikal
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
- Skin Cancer Unit, German Cancer Research Center(DKTK), 69121 Heidelberg, Germany
- Department of Dermatology, Venerology, and Allergology, University Medical Center, Ruprecht-Karls University of Heidelberg, 68167 Mannheim, Germany
| | - Jessica C. Hassel
- Department of Dermatology, University Hospital, Ruprecht-Karls University of Heidelberg, 69120 Heidelberg, Germany
| | - Benjamin Weide
- Department of Dermatology, University Hospital Tübingen, 72076 Tübingen, Germany
| | | | - Carmen Loquai
- Department of Dermatology, University Medical Center, 55131 Mainz, Germany
| | - Peter Mohr
- Department of Dermatology, Elbe-Kliniken, 21614 Buxtehude, Germany
| | - Ralf Gutzmer
- Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, 30625 Hannover, Germany
| | - Reinhard Dummer
- Department of Dermatology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Stacey Gabriel
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Catherine J. Wu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Dirk Schadendorf
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Levi A. Garraway
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02215, USA
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40
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Van Allen EM, Miao D, Schilling B, Shukla SA, Blank C, Zimmer L, Sucker A, Hillen U, Foppen MHG, Goldinger SM, Utikal J, Hassel JC, Weide B, Kaehler KC, Loquai C, Mohr P, Gutzmer R, Dummer R, Gabriel S, Wu CJ, Schadendorf D, Garraway LA. Genomic correlates of response to CTLA-4 blockade in metastatic melanoma. Science 2015; 350:207-211. [PMID: 26359337 PMCID: PMC5054517 DOI: 10.1126/science.aad0095 10.1126/science.aaf8264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 08/27/2015] [Indexed: 07/10/2023]
Abstract
Monoclonal antibodies directed against cytotoxic T lymphocyte-associated antigen-4 (CTLA-4), such as ipilimumab, yield considerable clinical benefit for patients with metastatic melanoma by inhibiting immune checkpoint activity, but clinical predictors of response to these therapies remain incompletely characterized. To investigate the roles of tumor-specific neoantigens and alterations in the tumor microenvironment in the response to ipilimumab, we analyzed whole exomes from pretreatment melanoma tumor biopsies and matching germline tissue samples from 110 patients. For 40 of these patients, we also obtained and analyzed transcriptome data from the pretreatment tumor samples. Overall mutational load, neoantigen load, and expression of cytolytic markers in the immune microenvironment were significantly associated with clinical benefit. However, no recurrent neoantigen peptide sequences predicted responder patient populations. Thus, detailed integrated molecular characterization of large patient cohorts may be needed to identify robust determinants of response and resistance to immune checkpoint inhibitors.
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Affiliation(s)
- Eliezer M. Van Allen
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Diana Miao
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Bastian Schilling
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Sachet A. Shukla
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Christian Blank
- Department of Medical Oncology, Netherlands Cancer Institute, 1066 CX Amsterdam, Netherlands
| | - Lisa Zimmer
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Antje Sucker
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Uwe Hillen
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Marnix H. Geukes Foppen
- Department of Medical Oncology, Netherlands Cancer Institute, 1066 CX Amsterdam, Netherlands
| | - Simone M. Goldinger
- Department of Dermatology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Jochen Utikal
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
- Skin Cancer Unit, German Cancer Research Center(DKTK), 69121 Heidelberg, Germany
- Department of Dermatology, Venerology, and Allergology, University Medical Center, Ruprecht-Karls University of Heidelberg, 68167 Mannheim, Germany
| | - Jessica C. Hassel
- Department of Dermatology, University Hospital, Ruprecht-Karls University of Heidelberg, 69120 Heidelberg, Germany
| | - Benjamin Weide
- Department of Dermatology, University Hospital Tübingen, 72076 Tübingen, Germany
| | | | - Carmen Loquai
- Department of Dermatology, University Medical Center, 55131 Mainz, Germany
| | - Peter Mohr
- Department of Dermatology, Elbe-Kliniken, 21614 Buxtehude, Germany
| | - Ralf Gutzmer
- Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, 30625 Hannover, Germany
| | - Reinhard Dummer
- Department of Dermatology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Stacey Gabriel
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Catherine J. Wu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Dirk Schadendorf
- Department of Dermatology, University Hospital, University Duisburg—Essen, 45147 Essen, Germany
- German Cancer Consortium (DKTK), 69121 Heidelberg, Germany
| | - Levi A. Garraway
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02215, USA
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Abstract
The search for specificity in cancers has been a holy grail in cancer immunology. Cancer geneticists have long known that cancers harbor transforming and other mutations. Immunologists have long known that inbred mice can be immunized against syngeneic cancers, indicating the existence of cancer-specific antigens. With the technological advances in high-throughput DNA sequencing and bioinformatics, the genetic and immunologic lines of inquiry are now converging to provide definitive evidence that human cancers are vastly different from normal tissues at the genetic level, and that some of these differences are recognized by the immune system. The very vastness of genetic changes in cancers now raises different question. Which of the many cancer-specific genetic (genomic) changes are actually recognized by the immune system, and why? New observations are now beginning to probe these vital issues with unprecedented resolution and are informing a new generation of studies in human cancer immunotherapy.
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Affiliation(s)
- Pramod K Srivastava
- Carole and Ray Neag Comprehensive Cancer Center and the Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut.
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42
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Wang M, Yin B, Wang HY, Wang RF. Current advances in T-cell-based cancer immunotherapy. Immunotherapy 2015; 6:1265-78. [PMID: 25524383 DOI: 10.2217/imt.14.86] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cancer is a leading cause of death worldwide; due to the lack of ideal cancer biomarkers for early detection or diagnosis, most patients present with late-stage disease at the time of diagnosis, thus limiting the potential for successful treatment. Traditional cancer treatments, including surgery, chemotherapy and radiation therapy, have demonstrated very limited efficacy for patients with late-stage disease. Therefore, innovative and effective cancer treatments are urgently needed for cancer patients with late-stage and refractory disease. Cancer immunotherapy, particularly adoptive cell transfer, has shown great promise in the treatment of patients with late-stage disease, including those who are refractory to standard therapies. In this review, we will highlight recent advances and discuss future directions in adoptive cell transfer based cancer immunotherapy.
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Affiliation(s)
- Mingjun Wang
- Center for Inflammation & Epigenetics, Houston Methodist Research Institute, Houston, TX 77030, USA
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43
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Identification of DRG-1 As a Melanoma-Associated Antigen Recognized by CD4+ Th1 Cells. PLoS One 2015; 10:e0124094. [PMID: 25993655 PMCID: PMC4439028 DOI: 10.1371/journal.pone.0124094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 03/02/2015] [Indexed: 01/08/2023] Open
Abstract
Immunotherapy has emerged as a promising strategy for the treatment of metastatic melanoma. Clinical studies have demonstrated the feasibility of cancer immunotherapy using tumor antigens recognized by CD8+ T cells. However, the overall immune responses induced by these antigens are too weak and transient to induce tumor regression in the majority of patients who received immunization. A growing body of evidence suggests that CD4+ T helper (Th) cells play an important role in antitumor immunity. Therefore, the identification of MHC class II-restricted tumor antigens capable of stimulating CD4+ T cells may provide opportunities for developing effective cancer vaccines. To this end, we describe the identification of developmentally regulated GTP-binding protein 1 (DRG-1) as a melanoma-associated antigen recognized by HLA-DR11-restricted CD4+ Th1 cells. Epitope mapping analysis showed that the DRG1248-268 epitope of DRG-1 was required for T cell recognition. Reverse transcription-polymerase chain reaction revealed that DRG-1 was highly expressed in melanoma cell lines but not in normal tissues. DRG-1 knockdown by lentiviral-based shRNA suppressed melanoma cell proliferation and soft agar colony formation. Taken together, these data suggest that DRG-1 plays an important role in melanoma cell growth and transformation, indicating that DRG1 may represent a novel target for CD4+ T cell-mediated immunotherapy in melanoma.
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44
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Kreiter S, Vormehr M, van de Roemer N, Diken M, Löwer M, Diekmann J, Boegel S, Schrörs B, Vascotto F, Castle JC, Tadmor AD, Schoenberger SP, Huber C, Türeci Ö, Sahin U. Mutant MHC class II epitopes drive therapeutic immune responses to cancer. Nature 2015; 520:692-6. [PMID: 25901682 DOI: 10.1038/nature14426] [Citation(s) in RCA: 879] [Impact Index Per Article: 97.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 03/30/2015] [Indexed: 12/23/2022]
Abstract
Tumour-specific mutations are ideal targets for cancer immunotherapy as they lack expression in healthy tissues and can potentially be recognized as neo-antigens by the mature T-cell repertoire. Their systematic targeting by vaccine approaches, however, has been hampered by the fact that every patient's tumour possesses a unique set of mutations ('the mutanome') that must first be identified. Recently, we proposed a personalized immunotherapy approach to target the full spectrum of a patient's individual tumour-specific mutations. Here we show in three independent murine tumour models that a considerable fraction of non-synonymous cancer mutations is immunogenic and that, unexpectedly, the majority of the immunogenic mutanome is recognized by CD4(+) T cells. Vaccination with such CD4(+) immunogenic mutations confers strong antitumour activity. Encouraged by these findings, we established a process by which mutations identified by exome sequencing could be selected as vaccine targets solely through bioinformatic prioritization on the basis of their expression levels and major histocompatibility complex (MHC) class II-binding capacity for rapid production as synthetic poly-neo-epitope messenger RNA vaccines. We show that vaccination with such polytope mRNA vaccines induces potent tumour control and complete rejection of established aggressively growing tumours in mice. Moreover, we demonstrate that CD4(+) T cell neo-epitope vaccination reshapes the tumour microenvironment and induces cytotoxic T lymphocyte responses against an independent immunodominant antigen in mice, indicating orchestration of antigen spread. Finally, we demonstrate an abundance of mutations predicted to bind to MHC class II in human cancers as well by employing the same predictive algorithm on corresponding human cancer types. Thus, the tailored immunotherapy approach introduced here may be regarded as a universally applicable blueprint for comprehensive exploitation of the substantial neo-epitope target repertoire of cancers, enabling the effective targeting of every patient's tumour with vaccines produced 'just in time'.
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Affiliation(s)
- Sebastian Kreiter
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Mathias Vormehr
- Research Center for Immunotherapy (FZI), Langenbeckstrasse 1, Building 708, 55131 Mainz, Germany
| | - Niels van de Roemer
- Research Center for Immunotherapy (FZI), Langenbeckstrasse 1, Building 708, 55131 Mainz, Germany
| | - Mustafa Diken
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Martin Löwer
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Jan Diekmann
- 1] TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany [2] Biopharmaceutical New Technologies (BioNTech) Corporation, An der Goldgrube 12, 55131 Mainz, Germany
| | - Sebastian Boegel
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Barbara Schrörs
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Fulvia Vascotto
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - John C Castle
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Arbel D Tadmor
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Stephen P Schoenberger
- La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, California 92037, USA
| | - Christoph Huber
- Research Center for Immunotherapy (FZI), Langenbeckstrasse 1, Building 708, 55131 Mainz, Germany
| | - Özlem Türeci
- TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany
| | - Ugur Sahin
- 1] TRON - Translational Oncology at the University Medical Center of Johannes Gutenberg University, Freiligrathstrasse 12, 55131 Mainz, Germany [2] Research Center for Immunotherapy (FZI), Langenbeckstrasse 1, Building 708, 55131 Mainz, Germany [3] Biopharmaceutical New Technologies (BioNTech) Corporation, An der Goldgrube 12, 55131 Mainz, Germany
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45
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Zanetti M. Tapping CD4 T Cells for Cancer Immunotherapy: The Choice of Personalized Genomics. THE JOURNAL OF IMMUNOLOGY 2015; 194:2049-56. [DOI: 10.4049/jimmunol.1402669] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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46
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Linnemann C, van Buuren MM, Bies L, Verdegaal EME, Schotte R, Calis JJA, Behjati S, Velds A, Hilkmann H, Atmioui DE, Visser M, Stratton MR, Haanen JBAG, Spits H, van der Burg SH, Schumacher TNM. High-throughput epitope discovery reveals frequent recognition of neo-antigens by CD4+ T cells in human melanoma. Nat Med 2014; 21:81-5. [PMID: 25531942 DOI: 10.1038/nm.3773] [Citation(s) in RCA: 524] [Impact Index Per Article: 52.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 11/18/2014] [Indexed: 01/15/2023]
Abstract
Tumor-specific neo-antigens that arise as a consequence of mutations are thought to be important for the therapeutic efficacy of cancer immunotherapies. Accumulating evidence suggests that neo-antigens may be commonly recognized by intratumoral CD8+ T cells, but it is unclear whether neo-antigen-specific CD4+ T cells also frequently reside within human tumors. In view of the accepted role of tumor-specific CD4+ T-cell responses in tumor control, we addressed whether neo-antigen-specific CD4+ T-cell reactivity is a common property in human melanoma.
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Affiliation(s)
- Carsten Linnemann
- Division of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Marit M van Buuren
- Division of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Laura Bies
- Division of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Els M E Verdegaal
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Jorg J A Calis
- Division of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Sam Behjati
- Cancer Genome Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, United Kingdom
| | - Arno Velds
- Central Genomics Facility, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Henk Hilkmann
- Peptide Synthesis Facility, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Dris El Atmioui
- Peptide Synthesis Facility, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Marten Visser
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, the Netherlands
| | - Michael R Stratton
- Cancer Genome Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, United Kingdom
| | - John B A G Haanen
- 1] Division of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands. [2] Division of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Hergen Spits
- AIMM Therapeutics B.V., Amsterdam, the Netherlands
| | - Sjoerd H van der Burg
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, the Netherlands
| | - Ton N M Schumacher
- Division of Immunology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
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47
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Yang J, Zhang Q, Li K, Yin H, Zheng JN. Composite peptide-based vaccines for cancer immunotherapy (Review). Int J Mol Med 2014; 35:17-23. [PMID: 25395173 DOI: 10.3892/ijmm.2014.2000] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 11/03/2014] [Indexed: 11/06/2022] Open
Abstract
The use of peptide-based vaccines as therapeutics aims to elicit immune responses through antigenic epitopes derived from tumor antigens. Peptide-based vaccines are easily synthesized and chemically stable entities, and of note, they are absent of oncogenic potential. However, their application is more complicated as the success of an effective peptide-based vaccine is determined by numerous parameters. The success thus far has been limited by the choice of tumor antigenic peptides, poor immunogenicity and incorporation of strategies to reverse cancer-mediated immune suppression. In the present review, an overview of the mechanisms of peptide-based vaccines is provided and antigenic peptides are categorized with respect to their tissue distribution in order to determine their usefulness as targets. Furthermore, certain approaches are proposed that induce and maintain T cells for immunotherapy. The recent progress indicates that peptide-based vaccines are preferential for targeted therapy in cancer patients.
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Affiliation(s)
- Jie Yang
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221000, P.R. China
| | - Qing Zhang
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221000, P.R. China
| | - Ke Li
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221000, P.R. China
| | - Hong Yin
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221000, P.R. China
| | - Jun-Nian Zheng
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical College, Xuzhou, Jiangsu 221000, P.R. China
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48
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Protti MP, De Monte L, Monte LD, Di Lullo G, Lullo GD. Tumor antigen-specific CD4+ T cells in cancer immunity: from antigen identification to tumor prognosis and development of therapeutic strategies. ACTA ACUST UNITED AC 2014; 83:237-46. [PMID: 24641502 DOI: 10.1111/tan.12329] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Indexed: 12/22/2022]
Abstract
CD4(+) T cells comprise a large fraction of tumor infiltrating lymphocytes and it is now established that they may exert an important role in tumor immune-surveillance. Several CD4(+) T cell subsets [i.e. T helper (Th)1, Th2, T regulatory (Treg), Th17, Th22 and follicular T helper (Tfh)] have been described and differentiation of each subset depends on both the antigen presenting cells responsible for its activation and the cytokine environment present at the site of priming. Tumor antigen-specific CD4(+) T cells with different functional activity have been found in the blood of cancer patients and different CD4(+) T cell subsets have been identified at the tumor site by the expression of specific transcription factors and the profile of secreted cytokines. Importantly, depending on the subset, CD4(+) T cells may exert antitumor versus pro-tumor functions. Here we review the studies that first identified the presence of tumor-specific CD4(+) T cells in cancer patients, the techniques used to identify the tumor antigens recognized, the role of the different CD4(+) T cell subsets in tumor immunity and in cancer prognosis and the development of therapeutic strategies aimed at activating efficient antitumor CD4(+) T cell effectors.
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Affiliation(s)
- M P Protti
- Tumor Immunology Unit, San Raffaele Scientific Institute, Milan, Italy; Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Milan, Italy
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49
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Corthay A. Does the immune system naturally protect against cancer? Front Immunol 2014; 5:197. [PMID: 24860567 PMCID: PMC4026755 DOI: 10.3389/fimmu.2014.00197] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 04/22/2014] [Indexed: 12/20/2022] Open
Abstract
The importance of the immune system in conferring protection against pathogens like viruses, bacteria, and parasitic worms is well established. In contrast, there is a long-lasting debate on whether cancer prevention is a primary function of the immune system. The concept of immunological surveillance of cancer was developed by Lewis Thomas and Frank Macfarlane Burnet more than 50 years ago. We are still lacking convincing data illustrating immunological eradication of precancerous lesions in vivo. Here, I present eight types of evidence in support of the cancer immunosurveillance hypothesis. First, primary immunodeficiency in mice and humans is associated with increased cancer risk. Second, organ transplant recipients, who are treated with immunosuppressive drugs, are more prone to cancer development. Third, acquired immunodeficiency due to infection by human immunodeficiency virus (HIV-1) leads to elevated risk of cancer. Fourth, the quantity and quality of the immune cell infiltrate found in human primary tumors represent an independent prognostic factor for patient survival. Fifth, cancer cells harbor mutations in protein-coding genes that are specifically recognized by the adaptive immune system. Sixth, cancer cells selectively accumulate mutations to evade immune destruction (“immunoediting”). Seventh, lymphocytes bearing the NKG2D receptor are able to recognize and eliminate stressed premalignant cells. Eighth, a promising strategy to treat cancer consists in potentiating the naturally occurring immune response of the patient, through blockade of the immune checkpoint molecules CTLA-4, PD-1, or PD-L1. Thus, there are compelling pieces of evidence that a primary function of the immune system is to confer protection against cancer.
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Affiliation(s)
- Alexandre Corthay
- Tumor Immunology Group, Department of Pathology, Oslo University Hospital Rikshospitalet , Oslo , Norway ; Department of Biosciences, University of Oslo , Oslo , Norway ; Centre for Immune Regulation, University of Oslo , Oslo , Norway
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50
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Wank R, Song X, Gu S, Laumbacher B. Benefits of a continuous therapy for cancer patients with a novel adoptive cell therapy by cascade priming (CAPRI). Immunotherapy 2014; 6:269-82. [DOI: 10.2217/imt.14.6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
A growing body of evidence shows that immune cells are pivotal in the fight against cancer. First, association studies have identified immune-protective immune response genes against cancer. Second, the presence of immune cells in the respective malignant tumor correlated with a better prognosis for the patients. Third, adoptive cell therapy (ACT) showed, in recent reports, an efficient reduction or even cure for malignant tumors. The focus of this review is a novel in vitro ACT technique, using the patient’s cascade-primed immune cells. The cascade-priming procedure stimulates APCs from the peripheral blood. Stimulated APCs digest and present tumor material better and differentiate naive cytotoxic T-lymphocyte effector cells against the patient’s cancer. The principle and the impressive results of the cascade-primed immune cell treatment in patient case series is compared with the ACT concepts of lymphokine-activated killer, macrophage-activated killer, macrophage-activated killer-dendritic cell, cytokine-induced killer and tumor-infiltrating lymphocyte methods.
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Affiliation(s)
- Rudolf Wank
- Immunotherapy Research Center Munich, Pettenkoferstr. 8, 80336 Munich, Germany
| | - Xin Song
- Third Affiliated Hospital, Kunming Medical University, No 519 Kunzhou Road, Kunming, 650118 Yunnan, China
| | - Songhai Gu
- Immunotherapy Research Center Munich, Pettenkoferstr. 8, 80336 Munich, Germany
| | - Barbara Laumbacher
- Immunotherapy Research Center Munich, Pettenkoferstr. 8, 80336 Munich, Germany
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