1
|
Hu S, Han P, Wang M, Cao X, Liu H, Zhang S, Zhang S, Liu J, Han Y, Xiao J, Chen Q, Miao K, Qi J, Tan S, Gao GF, Wang H. Structural basis for the immune recognition and selectivity of the immune receptor PVRIG for ligand Nectin-2. Structure 2024; 32:918-929.e4. [PMID: 38626767 DOI: 10.1016/j.str.2024.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 02/27/2024] [Accepted: 03/20/2024] [Indexed: 06/27/2024]
Abstract
Nectin and nectin-like (Necl) co-receptor axis, comprised of receptors DNAM-1, TIGIT, CD96, PVRIG, and nectin/Necl ligands, is gaining prominence in immuno-oncology. Within this axis, the inhibitory receptor PVRIG recognizes Nectin-2 with high affinity, but the underlying molecular basis remains unknown. By determining the crystal structure of PVRIG in complex with Nectin-2, we identified a unique CC' loop in PVRIG, which complements the double-lock-and-key binding mode and contributes to its high affinity for Nectin-2. The association of the corresponding charged residues in the F-strands explains the ligand selectivity of PVRIG toward Nectin-2 but not for Necl-5. Moreover, comprehensive comparisons of the binding capacities between co-receptors and ligands provide innovative insights into the intra-axis immunoregulatory mechanism. Taken together, these findings broaden our understanding of immune recognition and regulation mediated by nectin/Necl co-receptors and provide a rationale for the development of immunotherapeutic strategies targeting the nectin/Necl axis.
Collapse
Affiliation(s)
- Songtao Hu
- Institutes of Physical Science and Information Technology, Anhui University, Anhui 230601, China; Cancer Center, Faculty of Health Sciences, University of Macau, Taipa Macau SAR, China; Beijing Life Science Academy, Beijing 102200, China
| | - Pu Han
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Meiyu Wang
- Institutes of Physical Science and Information Technology, Anhui University, Anhui 230601, China
| | - Xiaoqing Cao
- Department of Thoracic Surgery, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing 101125, China
| | - Hao Liu
- Cancer Center, Faculty of Health Sciences, University of Macau, Taipa Macau SAR, China
| | - Shuailong Zhang
- Institutes of Physical Science and Information Technology, Anhui University, Anhui 230601, China
| | - Shuijun Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jun Liu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing 102206, China
| | - Yi Han
- Department of Thoracic Surgery, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing 101125, China
| | - Jinhe Xiao
- Department of Prevention and Treatment of Breast Disease, Haidian District Maternal and Child Health Care Hospital, Beijing 100080, China
| | - Qiang Chen
- Cancer Center, Faculty of Health Sciences, University of Macau, Taipa Macau SAR, China
| | - Kai Miao
- Cancer Center, Faculty of Health Sciences, University of Macau, Taipa Macau SAR, China
| | - Jianxun Qi
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Shuguang Tan
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - George Fu Gao
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Han Wang
- Beijing Life Science Academy, Beijing 102200, China; Department of Biomedical Engineering, College of Future Technology, Peking University, Beijing 100080, China.
| |
Collapse
|
2
|
Zhang P, Liu X, Gu Z, Jiang Z, Zhao S, Song Y, Yu J. Targeting TIGIT for cancer immunotherapy: recent advances and future directions. Biomark Res 2024; 12:7. [PMID: 38229100 PMCID: PMC10790541 DOI: 10.1186/s40364-023-00543-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/08/2023] [Indexed: 01/18/2024] Open
Abstract
As a newly identified checkpoint, T cell immunoreceptor with immunoglobulin and tyrosine-based inhibitory motif (ITIM) domain (TIGIT) is highly expressed on CD4+ T cells, CD8+ T cells, natural killer (NK) cells, regulatory T cells (Tregs), and tumor-infiltrating lymphocytes (TILs). TIGIT has been associated with NK cell exhaustion in vivo and in individuals with various cancers. It not only modulates NK cell survival but also mediates T cell exhaustion. As the primary ligand of TIGIT in humans, CD155 may be the main target for immunotherapy due to its interaction with TIGIT. It has been found that the anti-programmed cell death protein 1 (PD-1) treatment response in cancer immunotherapy is correlated with CD155 but not TIGIT. Anti-TIGIT alone and in combination with anti-PD-1 agents have been tested for cancer immunotherapy. Although two clinical studies on advanced lung cancer had positive results, the TIGIT-targeted antibody, tiragolumab, recently failed in two new trials. In this review, we highlight the current developments on TIGIT for cancer immunotherapy and discuss the characteristics and functions of TIGIT.
Collapse
Affiliation(s)
- Peng Zhang
- Department of Thoracic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
- Henan Medical Key Laboratory of Thoracic Oncology, Zhengzhou, 450052, Henan, China
| | - Xinyuan Liu
- Institute of Biomedical Informatics, Bioinformatics Center, Henan Provincial Engineering Center for Tumor Molecular Medicine, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, Henan, China
| | - Zhuoyu Gu
- Department of Thoracic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
- Henan Medical Key Laboratory of Thoracic Oncology, Zhengzhou, 450052, Henan, China
| | - Zhongxing Jiang
- Department of Hematology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Song Zhao
- Department of Thoracic Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
| | - Yongping Song
- Department of Hematology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
| | - Jifeng Yu
- Department of Hematology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China.
- Henan International Joint Laboratory of Nuclear Protein Gene Regulation, Henan University College of Medicine, Kaifeng, 475004, Henan, China.
| |
Collapse
|
3
|
Zhao J, Li L, Yin H, Feng X, Lu Q. TIGIT: An emerging immune checkpoint target for immunotherapy in autoimmune disease and cancer. Int Immunopharmacol 2023; 120:110358. [PMID: 37262959 DOI: 10.1016/j.intimp.2023.110358] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/11/2023] [Accepted: 05/15/2023] [Indexed: 06/03/2023]
Abstract
Immune checkpoints (ICs), also referred to as co-inhibitory receptors (IRs), are essential for regulating immune cell function to maintain tolerance and prevent autoimmunity. IRs, such as programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4), have been shown to possess immunoregulatory properties that are relevant to various autoimmune diseases and cancers. Tumors are characterized by suppressive microenvironments with elevated levels of IRs on tumor-infiltrating lymphocytes (TILs). Therefore, IR blockade has shown great potential in cancer therapy and has even been approved for clinical use. However, other IRs, including cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif (ITIM) domain (TIGIT), may also represent promising targets for anti-tumor therapy. The increasing importance of IRs in autoimmune diseases has become apparent. In mouse models, TIGIT pathway blockade or TIGIT deficiency has been linked to T cell overactivation and proliferation, exacerbation of inflammation, and increased susceptibility to autoimmune disorders. On the other hand, TIGIT activation has been shown to alleviate autoimmune disorders in murine models. Given these findings, we examine the effects of TIGIT and its potential as a therapeutic target for both autoimmune diseases and cancers. It is clear that TIGIT represents an emerging and exciting target for immunotherapy in these contexts.
Collapse
Affiliation(s)
- Junpeng Zhao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Peking Union Medical College, Chinese Academy of Medical Sciencs, Beijing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Liming Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Peking Union Medical College, Chinese Academy of Medical Sciencs, Beijing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Huiqi Yin
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Peking Union Medical College, Chinese Academy of Medical Sciencs, Beijing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Xiwei Feng
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Peking Union Medical College, Chinese Academy of Medical Sciencs, Beijing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Qianjin Lu
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Peking Union Medical College, Chinese Academy of Medical Sciencs, Beijing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.
| |
Collapse
|
4
|
Hermans D, van Beers L, Broux B. Nectin Family Ligands Trigger Immune Effector Functions in Health and Autoimmunity. BIOLOGY 2023; 12:452. [PMID: 36979144 PMCID: PMC10045777 DOI: 10.3390/biology12030452] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/06/2023] [Accepted: 03/13/2023] [Indexed: 03/18/2023]
Abstract
The superfamily of immunoglobulin cell-adhesion molecules (IgCAMs) is a well-known family of cell-adhesion molecules used for immune-cell extravasation and cell-cell interaction. Amongst others, this family includes DNAX accessory molecule 1 (DNAM-1/CD226), class-I-restricted T-cell-associated molecule (CRTAM/CD355), T-cell-activated increased late expression (Tactile/CD96), T-cell immunoreceptor with Ig and ITIM domains (TIGIT), Nectins and Nectin-like molecules (Necls). Besides using these molecules to migrate towards inflammatory sites, their interactions within the immune system can support the immunological synapse with antigen-presenting cells or target cells for cytotoxicity, and trigger diverse effector functions. Although their role is generally described in oncoimmunity, this review emphasizes recent advances in the (dys)function of Nectin-family ligands in health, chronic inflammatory conditions and autoimmune diseases. In addition, this review provides a detailed overview on the expression pattern of Nectins and Necls and their ligands on different immune-cell types by focusing on human cell systems.
Collapse
Affiliation(s)
- Doryssa Hermans
- University MS Center, Campus Diepenbeek, 3590 Diepenbeek, Belgium; (D.H.); (L.v.B.)
- Department of Immunology and Infection, Biomedical Research Institute, University of Hasselt, 3590 Diepenbeek, Belgium
| | - Lisa van Beers
- University MS Center, Campus Diepenbeek, 3590 Diepenbeek, Belgium; (D.H.); (L.v.B.)
- Department of Immunology and Infection, Biomedical Research Institute, University of Hasselt, 3590 Diepenbeek, Belgium
| | - Bieke Broux
- University MS Center, Campus Diepenbeek, 3590 Diepenbeek, Belgium; (D.H.); (L.v.B.)
- Department of Immunology and Infection, Biomedical Research Institute, University of Hasselt, 3590 Diepenbeek, Belgium
| |
Collapse
|
5
|
Li J, Xia Q, Di C, Li C, Si H, Zhou B, Yu S, Li Y, Huang J, Lu Y, Huang M, Liang H, Liu X, Zhao Q. Tumor Cell-Intrinsic CD96 Mediates Chemoresistance and Cancer Stemness by Regulating Mitochondrial Fatty Acid β-Oxidation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2202956. [PMID: 36581470 PMCID: PMC9982582 DOI: 10.1002/advs.202202956] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 11/30/2022] [Indexed: 05/30/2023]
Abstract
Targeting CD96 that originates in immune cells has shown potential for cancer therapy. However, the role of intrinsic CD96 in solid tumor cells remains unknown. Here, it is found that CD96 is frequently expressed in tumor cells from clinical breast cancer samples and is correlated with poor long-term prognosis in these patients. The CD96+ cancer cell subpopulations exhibit features of both breast cancer stem cells and chemoresistance. In vivo inhibition of cancer cell-intrinsic CD96 enhances the chemotherapeutic response in a patient-derived tumor xenograft model. Mechanistically, CD96 enhances mitochondrial fatty acid β-oxidation via the CD155-CD96-Src-Stat3-Opa1 pathway, which subsequently promotes chemoresistance in breast cancer stem cells. A previously unknown role is identified for tumor cell-intrinsic CD96 and an attractive target in improving the chemotherapeutic response.
Collapse
Affiliation(s)
- Jiang Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Qidong Xia
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Can Di
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Chunni Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Hang Si
- Department of Infectious DiseasesThird Affiliated Hospital, Sun Yat‐Sen UniversityGuangzhou510630China
- Guangdong Key Laboratory of Liver Disease ResearchThird Affiliated Hospital, Sun Yat‐Sen UniversityGuangzhou510630China
| | - Boxuan Zhou
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Shubin Yu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Yihong Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Jingying Huang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Yiwen Lu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Min Huang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
| | - Huixin Liang
- Department of Infectious DiseasesThird Affiliated Hospital, Sun Yat‐Sen UniversityGuangzhou510630China
- Guangdong Key Laboratory of Liver Disease ResearchThird Affiliated Hospital, Sun Yat‐Sen UniversityGuangzhou510630China
| | - Xinwei Liu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Breast Tumor CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Department of Breast SurgeryThe First Affiliated Hospital, Zhengzhou UniversityZhengzhou450052China
| | - Qiyi Zhao
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationMedical Research CenterSun Yat‐Sen Memorial Hospital, Sun Yat‐Sen UniversityGuangzhou510120China
- Department of Infectious DiseasesThird Affiliated Hospital, Sun Yat‐Sen UniversityGuangzhou510630China
- Guangdong Key Laboratory of Liver Disease ResearchThird Affiliated Hospital, Sun Yat‐Sen UniversityGuangzhou510630China
| |
Collapse
|
6
|
An Inhibitory Role for Human CD96 Endodomain in T Cell Anti-Tumor Responses. Cells 2023; 12:cells12020309. [PMID: 36672244 PMCID: PMC9856660 DOI: 10.3390/cells12020309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/14/2023] Open
Abstract
Immune checkpoint blockade (ICB) therapy involves the inhibition of immune checkpoint regulators which reverses their limitation of T cell anti-tumor responses and results in long-lasting tumor regression. However, poor clinical response or tumor relapse was observed in some patients receiving such therapy administered via antibodies blocking the cytotoxic T lymphocyte-associated protein 4 (CTLA-4) or the programmed cell death 1 (PD-1) pathway alone or in combination, suggesting the involvement of additional immune checkpoints. CD96, a possible immune checkpoint, was previously shown to suppress natural killer (NK) cell anti-tumor activity but its role in human T cells remains controversial. Here, we demonstrate that CRISPR/Cas9-based deletion of CD96 in human T cells enhanced their killing of leukemia cells in vitro. T cells engineered with a chimeric antigen receptor (CAR) comprising human epidermal growth factor receptor 2 (EGFR2/HER2)-binding extracellular region and intracellular regions of CD96 and CD3ζ (4D5-96z CAR-T cells) were less effective in suppressing the growth of HER2-expressing tumor cells in vitro and in vivo compared with counterparts bearing CAR that lacked CD96 endodomain (4D5-z CAR-T cells). Together, our findings implicate a role for CD96 endodomain in attenuating T cell cytotoxicity and support combination tumor immunotherapy targeting multiple rather than single immune checkpoints.
Collapse
|
7
|
CD96 as a Potential Immune Regulator in Cancers. Int J Mol Sci 2023; 24:ijms24021303. [PMID: 36674817 PMCID: PMC9866520 DOI: 10.3390/ijms24021303] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 01/12/2023] Open
Abstract
The discovery of CTLA-4 and PD-1 checkpoints has prompted scientific researchers and the pharmaceutical industry to develop and conduct extensive research on tumor-specific inhibitors. As a result, the list of potential immune checkpoint molecules is growing over time. Receptors for nectin and nectin-like proteins have recently emerged as promising targets for cancer immunotherapy. Potential immune checkpoints, including CD226, TIGIT, and CD96, belong to this receptor class. Among them, CD96 has received little attention. In this mini-review, we aim to discuss the basic biology of CD96 as well as the most recent relevant research on this as a promising candidate for cancer immunotherapy.
Collapse
|
8
|
Diong SJJ, Jashnani A, Drake AW, Bee C, Findeisen F, Dollinger G, Wang F, Rajpal A, Strop P, Lee PS. Biophysical characterization of PVR family interactions and therapeutic antibody recognition to TIGIT. MAbs 2023; 15:2253788. [PMID: 37675979 PMCID: PMC10486284 DOI: 10.1080/19420862.2023.2253788] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/08/2023] Open
Abstract
The clinical successes of immune checkpoint blockade have invigorated efforts to activate T cell-mediated responses against cancer. Targeting members of the PVR family, consisting of inhibitory receptors TIGIT, CD96, and CD112R, has been an active area of clinical investigation. In this study, the binding interactions and molecular assemblies of the PVR family receptors and ligands have been assessed in vitro. Furthermore, the anti-TIGIT monoclonal antibody BMS-986207 crystal structure in complex with TIGIT was determined and shows that the antibody binds an epitope that is commonly targeted by the CD155 ligand as well as other clinical anti-TIGIT antibodies. In contrast to previously proposed models, where TIGIT outcompetes costimulatory receptor CD226 for binding to CD155 due to much higher affinity (nanomolar range), our data rather suggest that PVR family members all engage in interactions with relatively weak affinity (micromolar range), including TIGIT and CD155 interactions. Thus, TIGIT and other PVR inhibitory receptors likely elicit immune suppression via increased surface expression rather than inherent differences in affinity. This work provides an improved foundational understanding of the PVR family network and mechanistic insight into therapeutic antibody intervention.
Collapse
Affiliation(s)
- SJ J. Diong
- Discovery Biologics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Aarti Jashnani
- Discovery Biologics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Andrew W. Drake
- Discovery Biologics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Christine Bee
- Biochemistry and Biophysics, Merck, South San Francisco, CA, USA
| | - Felix Findeisen
- Discovery Biologics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Gavin Dollinger
- Discovery Biologics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Feng Wang
- Large Molecule Drug Discovery, Genentech Research and Early Development, South San Francisco, CA, USA
| | - Arvind Rajpal
- Large Molecule Drug Discovery, Genentech Research and Early Development, South San Francisco, CA, USA
| | - Pavel Strop
- Research, Tallac Therapeutics, Burlingame, CA, USA
| | - Peter S. Lee
- Antibody Engineering, AbbVie, South San Francisco, CA, USA
| |
Collapse
|
9
|
Farhangnia P, Akbarpour M, Yazdanifar M, Aref AR, Delbandi AA, Rezaei N. Advances in therapeutic targeting of immune checkpoints receptors within the CD96-TIGIT axis: clinical implications and future perspectives. Expert Rev Clin Immunol 2022; 18:1217-1237. [PMID: 36154551 DOI: 10.1080/1744666x.2022.2128107] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION The development of therapeutic antibodies targeting immune checkpoint molecules (ICMs) that induce long-term remissions in cancer patients has revolutionized cancer immunotherapy. However, a major drawback is that relapse after an initial response may be attributed to innate and acquired resistance. Additionally, these treatments are not beneficial to all patients. Therefore, the discovery and targeting of novel ICMs and their combination with other immunotherapeutics are urgently needed. AREAS COVERED There has been increasing evidence of the CD96-TIGIT axis as ICMs in cancer immunotherapy in the last five years. This review will highlight and discuss the current knowledge about the role of CD96 and TIGIT in hematological and solid tumor immunotherapy in the context of empirical studies and clinical trials, and provide a comprehensive list of ongoing cancer clinical trials on the blockade of these ICMs, as well as the rationale behind combinational therapies with anti-PD-1/PD-L1 agents, chemotherapy drugs, and radiotherapy. Moreover, we share our perspectives on anti-CD96/TIGIT-related combination therapies. EXPERT OPINION CD96-TIGIT axis regulates anti-tumor immune responses. Thus, the receptors within this axis are the potential candidates for cancer immunotherapy. Combining the inhibition of CD96-TIGIT with anti-PD-1/PD-L1 mAbs and chemotherapy drugs has shown relatively effective results in the context of preclinical studies and tumor models.
Collapse
Affiliation(s)
- Pooya Farhangnia
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Immunology Board for Transplantation and Cell-Based Therapeutics (ImmunoTACT), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Mahzad Akbarpour
- Immunology Board for Transplantation and Cell-Based Therapeutics (ImmunoTACT), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Advanced Cellular Therapeutics Facility (ACTF), Hematopoietic Cellular Therapy Program, Section of Hematology & Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Mahboubeh Yazdanifar
- Stem Cell Transplantation and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA, USA
| | - Amir Reza Aref
- Belfer Center for Applied Cancer Science, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Ali-Akbar Delbandi
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Immunology Research Center, Institute of Immunology and Infectious Disease, Iran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
10
|
Wang J, Liu X, Jin T, Cao Y, Tian Y, Xu F. NK cell immunometabolism as target for liver cancer therapy. Int Immunopharmacol 2022; 112:109193. [PMID: 36087507 DOI: 10.1016/j.intimp.2022.109193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 08/04/2022] [Accepted: 08/22/2022] [Indexed: 11/29/2022]
Abstract
Natural killer (NK) cells are being used effectively as a potential candidate in tumor immunotherapy. However, the migration and transport of NK cells to solid tumors is inadequate. NK cell dysfunction, tumor invasiveness, and metastasis are associated with altered metabolism of NK cells in the liver cancer microenvironment. However, in liver cancers, metabolic impairment of NK cells is still not understood fully. Evidence from various sources has shown that the interaction of NK cell's immune checkpoints with its metabolic checkpoints is responsible for the regulation of the development and function of these cells. How immune checkpoints contribute to metabolic programming is still not fully understood, and how this can be beneficial needs a better understanding, but they are emerging to be incredibly compelling to rebuilding the function of NK cells in the tumor. It is expected to represent a potential aim that focuses on improving the efficacy of therapies based on NK cells for treating liver cancer. Here, the recent advancements made to understand the NK cell's metabolic reprogramming in liver cancer have been summarized, along with the possible interplay between the immune and the metabolic checkpoints in NK cell function. Finally, an overview of some potential metabolic-related targets that can be used for liver cancer therapy treatment has been presented.
Collapse
Affiliation(s)
- Junqi Wang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Xiaolin Liu
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314000, Zhejiang, China
| | - Tianqiang Jin
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Yuqing Cao
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Yu Tian
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Feng Xu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China.
| |
Collapse
|
11
|
Conner M, Hance KW, Yadavilli S, Smothers J, Waight JD. Emergence of the CD226 Axis in Cancer Immunotherapy. Front Immunol 2022; 13:914406. [PMID: 35812451 PMCID: PMC9263721 DOI: 10.3389/fimmu.2022.914406] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/26/2022] [Indexed: 01/31/2023] Open
Abstract
In recent years, a set of immune receptors that interact with members of the nectin/nectin-like (necl) family has garnered significant attention as possible points of manipulation in cancer. Central to this axis, CD226, TIGIT, and CD96 represent ligand (CD155)-competitive co-stimulatory/inhibitory receptors, analogous to the CTLA-4/B7/CD28 tripartite. The identification of PVRIG (CD112R) and CD112 has introduced complexity and enabled additional nodes of therapeutic intervention. By virtue of the clinical progression of TIGIT antagonists and emergence of novel CD96- and PVRIG-based approaches, our overall understanding of the 'CD226 axis' in cancer immunotherapy is starting to take shape. However, several questions remain regarding the unique characteristics of, and mechanistic interplay between, each receptor-ligand pair. This review provides an overview of the CD226 axis in the context of cancer, with a focus on the status of immunotherapeutic strategies (TIGIT, CD96, and PVRIG) and their underlying biology (i.e., cis/trans interactions). We also integrate our emerging knowledge of the immune populations involved, key considerations for Fc gamma (γ) receptor biology in therapeutic activity, and a snapshot of the rapidly evolving clinical landscape.
Collapse
|
12
|
Wang D, Gu Y, Yan X, Huo C, Wang G, Zhao Y, Teng M, Li Y. Role of CD155/TIGIT in Digestive Cancers: Promising Cancer Target for Immunotherapy. Front Oncol 2022; 12:844260. [PMID: 35433470 PMCID: PMC9005749 DOI: 10.3389/fonc.2022.844260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/04/2022] [Indexed: 12/19/2022] Open
Abstract
The tumor microenvironment restricts the function and survival of various immune cells by up-regulating inhibitory immune checkpoints, and participates in the immune escape of tumors. The development of immunotherapies targeting immune checkpoints, such as programmed cell death receptor 1 antibody and anti-cytotoxic T lymphocyte-associated antigen 4 antibody, has provided many options for cancer treatment. The efficacy of other immune checkpoint inhibitors is also under development and research. Among them, T cell immunoreceptor with Ig and ITIM domains (TIGIT) has shown excellent clinical application prospects. Correspondingly, poliovirus receptor (PVR, CD155), one of the main ligands of TIGIT, is mainly expressed in various human malignant tumors and myeloid cells. CD155 interacts with TIGIT on natural killer cells and T cells, mediating inhibitory immunomodulatory regulation. This study summarized the mechanism of CD155/TIGIT in regulating immune cells and its role in the occurrence and development of digestive system tumors, aiming to provide a new perspective for immunotherapy of digestive cancers.
Collapse
Affiliation(s)
- Daijun Wang
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Yanmei Gu
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Xin Yan
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Chengdong Huo
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Guan Wang
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Yang Zhao
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China.,Key Laboratory of Digestive System Tumors of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
| | - Muzhou Teng
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China.,Key Laboratory of Digestive System Tumors of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
| | - Yumin Li
- The Second Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China.,Key Laboratory of Digestive System Tumors of Gansu Province, Second Hospital of Lanzhou University, Lanzhou, China
| |
Collapse
|
13
|
Expression of Immune Checkpoints in Malignant Tumors: Therapy Targets and Biomarkers for the Gastric Cancer Prognosis. Diagnostics (Basel) 2021; 11:diagnostics11122370. [PMID: 34943606 PMCID: PMC8700640 DOI: 10.3390/diagnostics11122370] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 02/07/2023] Open
Abstract
To increase the effectiveness of anticancer therapy based on immune checkpoint (IC) inhibition, some ICs are being investigated in addition to those used in clinic. We reviewed data on the relationship between PD-L1, B7-H3, B7-H4, IDO1, Galectin-3 and -9, CEACAM1, CD155, Siglec-15 and ADAM17 expression with cancer development in complex with the results of clinical trials on their inhibition. Increased expression of the most studied ICs—PD-L1, B7-H3, and B7-H4—is associated with poor survival; their inhibition is clinically significant. Expression of IDO1, CD155, and ADAM17 is also associated with poor survival, including gastric cancer (GC). The available data indicate that CD155 and ADAM17 are promising targets for immune therapy. However, the clinical trials of anti-IDO1 antibodies have been unsatisfactory. Expression of Galectin-3 and -9, CEACAM1 and Siglec-15 demonstrates a contradictory relationship with patient survival. The lack of satisfactory results of these IC inhibitor clinical trials additionally indicates the complex nature of their functioning. In conclusion, in many cases it is important to analyze the expression of other participants of the immune response besides target IC. The PD-L1, B7-H3, B7-H4, IDO1 and ADAM17 may be considered as candidates for prognosis markers for GC patient survival.
Collapse
|
14
|
Lee PS, Chau B, Barman I, Bee C, Jashnani A, Hogan JM, Aguilar B, Dollinger G, Rajpal A, Strop P. Antibody blockade of CD96 by distinct molecular mechanisms. MAbs 2021; 13:1979800. [PMID: 34595996 PMCID: PMC8489928 DOI: 10.1080/19420862.2021.1979800] [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] [Indexed: 10/24/2022] Open
Abstract
The molecular interactions of mouse CD96 to CD155 ligand and to two surrogate antibodies have been investigated. Biophysical and structural studies demonstrate that CD96 forms a homodimer but assembles as 1:1 heterodimeric complexes with CD155 or with one of the surrogate antibodies, which compete for the same binding interface. In comparison, the other surrogate antibody binds across the mouse CD96 dimer and recognizes a quaternary epitope spanning both protomers to block exposure of the ligand-binding site. This study reveals different blocking mechanisms and modalities of these two antibodies and may provide insight into the functional effects of antibodies against CD96.
Collapse
Affiliation(s)
- Peter S Lee
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Bryant Chau
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Ishita Barman
- Therapeutic Discovery, 3T Biosciences, South San Francisco, Ca, USA
| | - Christine Bee
- Discovery Biology, Frontier Medicines, South San Francisco, CA, USA
| | - Aarti Jashnani
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Jason M Hogan
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Barbara Aguilar
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Gavin Dollinger
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| | - Arvind Rajpal
- Large Molecule Drug Discovery, Genentech Research and Early Development, South San Francisco, Ca, USA
| | - Pavel Strop
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA
| |
Collapse
|
15
|
Wu B, Zhong C, Lang Q, Liang Z, Zhang Y, Zhao X, Yu Y, Zhang H, Xu F, Tian Y. Poliovirus receptor (PVR)-like protein cosignaling network: new opportunities for cancer immunotherapy. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2021; 40:267. [PMID: 34433460 PMCID: PMC8390200 DOI: 10.1186/s13046-021-02068-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 08/10/2021] [Indexed: 12/14/2022]
Abstract
Immune checkpoint molecules, also known as cosignaling molecules, are pivotal cell-surface molecules that control immune cell responses by either promoting (costimulatory molecules) or inhibiting (coinhibitory molecules) a signal. These molecules have been studied for many years. The application of immune checkpoint drugs in the clinic provides hope for cancer patients. Recently, the poliovirus receptor (PVR)-like protein cosignaling network, which involves several immune checkpoint receptors, i.e., DNAM-1 (DNAX accessory molecule-1, CD226), TIGIT (T-cell immunoglobulin (Ig) and immunoreceptor tyrosine-based inhibitory motif (ITIM)), CD96 (T cell activation, increased late expression (TACLILE)), and CD112R (PVRIG), which interact with their ligands CD155 (PVR/Necl-5), CD112 (PVRL2/nectin-2), CD111 (PVRL1/nectin-1), CD113 (PVRL3/nectin-3), and Nectin4, was discovered. As important components of the immune system, natural killer (NK) and T cells play a vital role in eliminating and killing foreign pathogens and abnormal cells in the body. Recently, increasing evidence has suggested that this novel cosignaling network axis costimulates and coinhibits NK and T cell activation to eliminate cancer cells after engaging with ligands, and this activity may be effectively targeted for cancer immunotherapy. In this article, we review recent advances in research on this novel cosignaling network. We also briefly outline the structure of this cosignaling network, the signaling cascades and mechanisms involved after receptors engage with ligands, and how this novel cosignaling network costimulates and coinhibits NK cell and T cell activation for cancer immunotherapy. Additionally, this review comprehensively summarizes the application of this new network in preclinical trials and clinical trials. This review provides a new immunotherapeutic strategy for cancer treatment.
Collapse
Affiliation(s)
- Baokang Wu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Chongli Zhong
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Qi Lang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Zhiyun Liang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Yizhou Zhang
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Xin Zhao
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Yang Yu
- Department of Surgery, Jinzhou Medical University, Jinzhou, 121001, Liaoning Province, China
| | - Heming Zhang
- Department of College of Medical and Biological Information Engineering, Northeastern University, Shenyang, 110819, Liaoning Province, China
| | - Feng Xu
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China
| | - Yu Tian
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, Liaoning Province, China.
| |
Collapse
|
16
|
BCL9 regulates CD226 and CD96 checkpoints in CD8 + T cells to improve PD-1 response in cancer. Signal Transduct Target Ther 2021; 6:313. [PMID: 34417435 PMCID: PMC8379253 DOI: 10.1038/s41392-021-00730-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 07/18/2021] [Accepted: 07/23/2021] [Indexed: 02/07/2023] Open
Abstract
To date, the overall response rate of PD-1 blockade remains unsatisfactory, partially due to limited understanding of tumor immune microenvironment (TIME). B-cell lymphoma 9 (BCL9), a key transcription co-activator of the Wnt pathway, is highly expressed in cancers. By genetic depletion and pharmacological inhibition of BCL9 in tumors, we found that BCL9 suppression reduced tumor growth, promoted CD8+ T cell tumor infiltration, and enhanced response to anti-PD-1 treatment in mouse colon cancer models. To determine the underlying mechanism of BCL9's role in TIME regulation, single-cell RNA-seq was applied to reveal cellular landscape and transcription differences in the tumor immune microenvironment upon BCL9 inhibition. CD155-CD226 and CD155-CD96 checkpoints play key roles in cancer cell/CD8+ T cell interaction. BCL9 suppression induces phosphorylation of VAV1 in CD8+ T cells and increases GLI1 and PATCH expression to promote CD155 expression in cancer cells. In The Cancer Genome Atlas database analysis, we found that BCL9 expression is positively associated with CD155 and negatively associated with CD226 expression. BCL9 is also linked to adenomatous polyposis coli (APC) mutation involved in patient survival following anti-PD-1 treatment. This study points to cellular diversity within the tumor immune microenvironment affected by BCL9 inhibition and provides new insights into the role of BCL9 in regulating CD226 and CD96 checkpoints.
Collapse
|
17
|
Luo C, Ye W, Hu J, Othmane B, Li H, Chen J, Zu X. A Poliovirus Receptor (CD155)-Related Risk Signature Predicts the Prognosis of Bladder Cancer. Front Oncol 2021; 11:660273. [PMID: 34150627 PMCID: PMC8210672 DOI: 10.3389/fonc.2021.660273] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/10/2021] [Indexed: 12/15/2022] Open
Abstract
Background Bladder cancer is an aggressive and heterogeneous disease associated with high morbidity and mortality. And poliovirus receptor (PVR or CD155) played crucial roles in tumor immune microenvironment and cancer development. However, their association remains obscure. Methods A total of 797 patients from TCGA and GEO databases were employed in our study, in which 285 cases were set as the training cohort and 512 were defined as the validation cohort. Our own Xiangya cohort with 57 samples was also used for the validation. Survival differences were evaluated by Kaplan-Meier analysis between groups. The immune infiltration was evaluated by ESTIMATE, TIMER, and CIBERSORT algorithms. The risk signature was constructed by LASSO Cox regression analysis. And a nomogram model was generated subsequent to the multivariate Cox proportional hazards analysis to predict 3- and 5-year survival of patients with bladder cancer. Results PVR was overexpressed across various cancers including bladder cancer and related to poorer overall survival in bladder urothelial carcinoma (BLCA). Samples with higher World Health Organization (WHO) grade or higher tumor stage tended to express higher level of PVR. And PVR-related genes were involved in several immune processes and oncological pathways. When the patients were divided into low- and high-risk groups based on their risk scores, we found that patients in the high-risk group had shorter overall survival time. Besides, samples with high risk were consistently correlated with tumor hallmarks and higher abundance of immune infiltration. Additionally, chemotherapy showed potent efficacy in high-risk group. Moreover, a nomogram including clinicopathologic features and the established risk signature could predict 3- and 5-year survival in patients with bladder cancer. Conclusion Our study revealed that PVR was overexpressed and related to poor prognosis in bladder cancer. A risk signature and nomogram model based on PVR-related genes could predict the prognosis and therapeutic efficacy and were also associated with the immune infiltration in bladder cancer.
Collapse
Affiliation(s)
- Cong Luo
- Department of Urology, Xiangya Hospital, Central South University (CSU), Changsha, China.,Clinical Medicine Eight-year Program, Xiangya Medical School of Central South University, Changsha, China
| | - Wenrui Ye
- Clinical Medicine Eight-year Program, Xiangya Medical School of Central South University, Changsha, China.,Department of Neurosurgery, Xiangya Hospital, Central South University (CSU), Changsha, China
| | - Jiao Hu
- Department of Urology, Xiangya Hospital, Central South University (CSU), Changsha, China
| | - Belaydi Othmane
- Department of Urology, Xiangya Hospital, Central South University (CSU), Changsha, China
| | - Huihuang Li
- Department of Urology, Xiangya Hospital, Central South University (CSU), Changsha, China
| | - Jinbo Chen
- Department of Urology, Xiangya Hospital, Central South University (CSU), Changsha, China
| | - Xiongbing Zu
- Department of Urology, Xiangya Hospital, Central South University (CSU), Changsha, China
| |
Collapse
|
18
|
Repositioning Azelnidipine as a Dual Inhibitor Targeting CD47/SIRPα and TIGIT/PVR Pathways for Cancer Immuno-Therapy. Biomolecules 2021; 11:biom11050706. [PMID: 34068552 PMCID: PMC8150775 DOI: 10.3390/biom11050706] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 05/03/2021] [Accepted: 05/07/2021] [Indexed: 12/12/2022] Open
Abstract
Strategies boosting both innate and adaptive immunity have great application prospects in cancer immunotherapy. Antibodies dual blocking the innate checkpoint CD47 and adaptive checkpoint PD-L1 or TIGIT could achieve durable anti-tumor effects. However, a small molecule dual blockade of CD47/SIRPα and TIGIT/PVR pathways has not been investigated. Here, an elevated expression of CD47 and PVR was observed in tumor tissues and cell lines analyzed with the GEO datasets and by flow cytometry, respectively. Compounds approved by the FDA were screened with the software MOE by docking to the potential binding pockets of SIRPα and PVR identified with the corresponding structural analysis. The candidate compounds were screened by blocking and MST binding assays. Azelnidipine was found to dual block CD47/SIRPα and TIGIT/PVR pathways by co-targeting SIRPα and PVR. In vitro, azelnidipine could enhance the macrophage phagocytosis when co-cultured with tumor cells. In vivo, azelnidipine alone or combined with irradiation could significantly inhibit the growth of MC38 tumors. Azelnidipine also significantly inhibits the growth of CT26 tumors, by enhancing the infiltration and function of CD8+ T cell in tumor and systematic immune response in the tumor-draining lymph node and spleen in a CD8+ T cell dependent manner. Our research suggests that the anti-hypertensive drug azelnidipine could be repositioned for cancer immunotherapy.
Collapse
|
19
|
Johnston RJ, Lee PS, Strop P, Smyth MJ. Cancer Immunotherapy and the Nectin Family. ANNUAL REVIEW OF CANCER BIOLOGY-SERIES 2021. [DOI: 10.1146/annurev-cancerbio-060920-084910] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
It is increasingly clear that the nectin family and its immunoreceptors shape the immune response to cancer through several pathways. Yet, even as antibodies against TIGIT, CD96, and CD112R advance into clinical development, biological and therapeutic questions remain unanswered. Here, we review recent progress, prospects, and challenges to understanding and tapping this family in cancer immunotherapy.
Collapse
Affiliation(s)
- Robert J. Johnston
- Oncology Discovery, Bristol Myers Squibb, Redwood City, California 94063, USA
| | - Peter S. Lee
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, California 94063, USA;,
| | - Pavel Strop
- Discovery Biotherapeutics, Bristol Myers Squibb, Redwood City, California 94063, USA;,
| | - Mark J. Smyth
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
| |
Collapse
|
20
|
TIGIT/CD226 Axis Regulates Anti-Tumor Immunity. Pharmaceuticals (Basel) 2021; 14:ph14030200. [PMID: 33670993 PMCID: PMC7997242 DOI: 10.3390/ph14030200] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 02/07/2023] Open
Abstract
Tumors escape immune surveillance by inducing various immunosuppressive pathways, including the activation of inhibitory receptors on tumor-infiltrating T cells. While monoclonal antibodies (mAbs) blocking programmed cell death 1 (PD-1), programmed death-ligand 1 (PD-L1), and cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) have been approved for multiple cancer indications, only a subset of patients benefit from immune checkpoint blockade therapies, highlighting the need for additional approaches. Therefore, the identification of new target molecules acting in distinct or complementary pathways in monotherapy or combination therapy with PD-1/PD-L1 blockade is gaining immense interest. T cell immunoreceptor with Ig and immunoreceptor tyrosine-based inhibitory motif (ITIM) domains (TIGIT) has received considerable attention in cancer immunotherapy. Recently, anti-TIGIT mAb (tiragolumab) has demonstrated promising clinical efficacy in non-small cell lung cancer treatment when combined with an anti-PD-L1 drug (Tecentriq), leading to phase III trial initiation. TIGIT is expressed mainly on T and natural killer cells; it functions as an inhibitory checkpoint receptor, thereby limiting adaptive and innate immunity. CD226 competes for binding with the same ligands with TIGIT but delivers a positive stimulatory signal to the immune cells. This review discusses the recent discoveries regarding the roles of TIGIT and CD226 in immune cell function and their potential application in cancer immunotherapy.
Collapse
|
21
|
Computer-aided design of PVR mutants with enhanced binding affinity to TIGIT. Cell Commun Signal 2021; 19:12. [PMID: 33557880 PMCID: PMC7869511 DOI: 10.1186/s12964-020-00701-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 12/26/2020] [Indexed: 12/13/2022] Open
Abstract
Background TIGIT, as a novel immune checkpoint molecule involved in T cell and NK cell anergy, could induce the immune tolerance and escape through binding with its ligand PVR. Blockade of TIGIT/PVR is considered as a promising strategy in cancer immunotherapy. However, to facilitate the design of inhibitors targeting TIGIT/PVR, the structural characteristics and binding mechanism still need to be further studied. Methods In this study, molecular dynamics (MD) simulations and in silico mutagenesis were used to analyze the interaction between TIGIT and its ligand PVR. Then, PVR mutants were designed and their activities were determined by using TIGIT overexpressed Jurkat cells. Results The results suggested that the loops of PVR (CC′ loop, C′C″ loop, and FG loop) underwent a large intra-molecular rearrangement, and more hydrogen bond crosslinking between PVR and TIGIT were formed during MD simulations. The potential residues for PVR to interact with TIGIT were identified and utilized to predict high affinity PVR mutants. Through the biological activity evaluation, four PVR mutants (PVRS72W, PVRS72R, PVRG131V and PVRS132Q) with enhanced affinity to TIGIT were discovered, which could elicit more potent inhibitory effects compared with the wild type PVR. Conclusions The MD simulations analysis provided new insights into the TIGIT/PVR interaction model, and the identified PVR mutants (PVRS72W, PVRS72R, PVRG131V and PVRS132Q) could serve as new candidates for immunotherapy to block TIGIT/PVR. Video Abstract
Collapse
|
22
|
Abstract
Antibody-based therapeutics targeting the inhibitory receptors PD-1, PD-L1, or CTLA-4 have shown remarkable clinical progress on several cancers. However, most patients do not benefit from these therapies. Thus, many efforts are being made to identify new immune checkpoint receptor-ligand pathways that are alternative targets for cancer immunotherapies. Nectin and nectin-like molecules are widely expressed on several types of tumor cells and play regulatory roles in T- and NK-cell functions. TIGIT, CD226, CD96 and CD112R on lymphoid cells are a group of immunoglobulin superfamily receptors that interact with Nectin and nectin-like molecules with different affinities. These receptors transmit activating or inhibitory signals upon binding their cognate ligands to the immune cells. The integrated signals formed by their complex interactions contribute to regu-lating immune-cell functions. Several clinical trials are currently evaluating the efficacy of anti-TIGIT and anti-CD112R blockades for treating patients with solid tumors. However, many questions still need to be answered in order to fully understand the dynamics and functions of these receptor networks. This review addresses the rationale behind targeting TIGIT, CD226, CD96, and CD112R to regulate T- and NK-cell functions and discusses their potential application in cancer immunotherapy.
Collapse
Affiliation(s)
- Hyung-seung Jin
- Department of Convergence Medicine, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Yoon Park
- Theragnosis Research Center, Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02456, Korea
| |
Collapse
|
23
|
Ding QQ, Chauvin JM, Zarour HM. Targeting novel inhibitory receptors in cancer immunotherapy. Semin Immunol 2020; 49:101436. [PMID: 33288379 DOI: 10.1016/j.smim.2020.101436] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 12/24/2022]
Abstract
T cells play a critical role in promoting tumor regression in both experimental models and humans. Yet, T cells that are chronically exposed to tumor antigen during cancer progression can become dysfunctional/exhausted and fail to induce tumor destruction. Such tumor-induced T cell dysfunction may occur via multiple mechanisms. In particular, immune checkpoint inhibitory receptors that are upregulated by tumor-infiltrating lymphocytes in many cancers limit T cell survival and function. Overcoming this inhibitory receptor-mediated T cell dysfunction has been a central focus of recent developments in cancer immunotherapy. Immunotherapies targeting inhibitory receptor pathways such as programmed cell death 1 (PD-1)/programmed death ligand 1 and cytotoxic T lymphocyte-associated antigen 4 (CTLA-4), alone or in combination, confer significant clinical benefits in multiple tumor types. However, many patients with cancer do not respond to immune checkpoint blockade, and dual PD-1/CTLA-4 blockade may cause serious adverse events, which limits its indications. Targeting novel non-redundant inhibitory receptor pathways contributing to tumor-induced T cell dysfunction in the tumor microenvironment may prove efficacious and non-toxic. This review presents preclinical and clinical findings supporting the roles of two key pathways-T-cell immunoglobulin and mucin-domain containing-3 (TIM-3) and T cell immunoreceptor with Ig and ITIM domain (TIGIT)/CD226/CD96/CD112R-in cancer immunotherapy.
Collapse
Affiliation(s)
- Quan-Quan Ding
- Department of Medicine and Division of Hematology/Oncology, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA
| | - Joe-Marc Chauvin
- Department of Medicine and Division of Hematology/Oncology, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA
| | - Hassane M Zarour
- Department of Medicine and Division of Hematology/Oncology, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA; Department of Immunology, University of Pittsburgh, School of Medicine, Pittsburgh, PA 15213, USA.
| |
Collapse
|
24
|
Sasikumar PG, Ramachandra M. Peptide and peptide-inspired checkpoint inhibitors: Protein fragments to cancer immunotherapy. MEDICINE IN DRUG DISCOVERY 2020. [DOI: 10.1016/j.medidd.2020.100073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
|
25
|
Cao Y, Wang X, Jin T, Tian Y, Dai C, Widarma C, Song R, Xu F. Immune checkpoint molecules in natural killer cells as potential targets for cancer immunotherapy. Signal Transduct Target Ther 2020; 5:250. [PMID: 33122640 PMCID: PMC7596531 DOI: 10.1038/s41392-020-00348-8] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 09/13/2020] [Accepted: 09/21/2020] [Indexed: 12/12/2022] Open
Abstract
Recent studies have demonstrated the potential of natural killer (NK) cells in immunotherapy to treat multiple types of cancer. NK cells are innate lymphoid cells that play essential roles in tumor surveillance and control that efficiently kill the tumor and do not require the major histocompatibility complex. The discovery of the NK's potential as a promising therapeutic target for cancer is a relief to oncologists as they face the challenge of increased chemo-resistant cancers. NK cells show great potential against solid and hematologic tumors and have progressively shown promise as a therapeutic target for cancer immunotherapy. The effector role of these cells is reliant on the balance of inhibitory and activating signals. Understanding the role of various immune checkpoint molecules in the exhaustion and impairment of NK cells when their inhibitory receptors are excessively expressed is particularly important in cancer immunotherapy studies and clinical implementation. Emerging immune checkpoint receptors and molecules have been found to mediate NK cell dysfunction in the tumor microenvironment; this has brought up the need to explore further additional NK cell-related immune checkpoints that may be exploited to enhance the immune response to refractory cancers. Accordingly, this review will focus on the recent findings concerning the roles of immune checkpoint molecules and receptors in the regulation of NK cell function, as well as their potential application in tumor immunotherapy.
Collapse
Affiliation(s)
- Yuqing Cao
- Department of General Surgery, Shengjing Hospital of China Medical University, 110004, Shenyang, China
| | - Xiaoyu Wang
- College of Life and Health Science, Northeastern University, 110819, Shenyang, China
| | - Tianqiang Jin
- Department of General Surgery, Shengjing Hospital of China Medical University, 110004, Shenyang, China
| | - Yu Tian
- Department of General Surgery, Shengjing Hospital of China Medical University, 110004, Shenyang, China
| | - Chaoliu Dai
- Department of General Surgery, Shengjing Hospital of China Medical University, 110004, Shenyang, China
| | - Crystal Widarma
- Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA
| | - Rui Song
- Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, 92350, USA.
| | - Feng Xu
- Department of General Surgery, Shengjing Hospital of China Medical University, 110004, Shenyang, China.
| |
Collapse
|
26
|
Chauhan SKS, Koehl U, Kloess S. Harnessing NK Cell Checkpoint-Modulating Immunotherapies. Cancers (Basel) 2020; 12:E1807. [PMID: 32640575 PMCID: PMC7408278 DOI: 10.3390/cancers12071807] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/30/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022] Open
Abstract
During the host immune response, the precise balance of the immune system, regulated by immune checkpoint, is required to avoid infection and cancer. These immune checkpoints are the mainstream regulator of the immune response and are crucial for self-tolerance. During the last decade, various new immune checkpoint molecules have been studied, providing an attractive path to evaluate their potential role as targets for effective therapeutic interventions. Checkpoint inhibitors have mainly been explored in T cells until now, but natural killer (NK) cells are a newly emerging target for the determination of checkpoint molecules. Simultaneously, an increasing number of therapeutic dimensions have been explored, including modulatory and inhibitory checkpoint molecules, either causing dysfunction or promoting effector functions. Furthermore, the combination of the immune checkpoint with other NK cell-based therapeutic strategies could also strengthen its efficacy as an antitumor therapy. In this review, we have undertaken a comprehensive review of the literature to date regarding underlying mechanisms of modulatory and inhibitory checkpoint molecules.
Collapse
Affiliation(s)
| | - Ulrike Koehl
- Institute of cellular therapeutics, Hannover Medical School, 30625 Hannover, Germany; (U.K.); (S.K.)
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany
- Institute of Clinical Immunology, University of Leipzig, 04103 Leipzig, Germany
| | - Stephan Kloess
- Institute of cellular therapeutics, Hannover Medical School, 30625 Hannover, Germany; (U.K.); (S.K.)
| |
Collapse
|
27
|
CD96, a new immune checkpoint, correlates with immune profile and clinical outcome of glioma. Sci Rep 2020; 10:10768. [PMID: 32612110 PMCID: PMC7330044 DOI: 10.1038/s41598-020-66806-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 05/13/2020] [Indexed: 12/14/2022] Open
Abstract
CD96 is a promising candidate for immunotherapy. However, its role and importance in glioma remains unknown. We thus aimed to genetically and clinically characterize CD96 expression in gliomas. For this, we extracted RNA-seq data of 699 glioma samples from the TCGA dataset and validated these findings using the CGGA dataset comprising 325 glioma samples. Clinical and isocitrate dehydrogenase (IDH) mutation status were also analyzed. Various packages in R language were mainly used for statistical analysis. CD96 expression was significantly up-regulated in high-grade, IDH-wildtype, and mesenchymal-molecular subtype gliomas based on TCGA data, which was validated using the CGGA dataset. Subsequent gene ontology analysis of both datasets suggested that genes relevant to CD96 are mainly involved in immune functions in glioma as such genes were positively correlated with CD96 expression. To further explore the relationship between CD96 and immune responses, we selected seven immune-related metagenes and found that CD96 expression was positively correlated with HCK, LCK, and MHC II in the CGGA and TCGA cohorts but negatively associated with IgG. Further, Pearson correlation analysis showed that CD96 is associated with TIGIT, CD226, CRTAM, TIM-3, PD-L1, CTLA-4, and STAT3, indicating the additive antitumoral effects of these checkpoint proteins. CD96 was also suggested to play an important role in immune responses and positively collaborate with other checkpoint members. These findings show that CD96 is promising candidate for immunotherapy, and that such agents could complement current immunotherapy strategies for glioma.
Collapse
|
28
|
Zhang Q, Zhong H, Fan Y, Liu Q, Song J, Yao S, Cao F. Immune and Clinical Features of CD96 Expression in Glioma by in silico Analysis. Front Bioeng Biotechnol 2020; 8:592. [PMID: 32695752 PMCID: PMC7338376 DOI: 10.3389/fbioe.2020.00592] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/14/2020] [Indexed: 12/13/2022] Open
Abstract
Background Immune checkpoints target regulatory pathways in T cells that enhance antitumor immune responses and elicit durable clinical responses. As a novel immune checkpoint, CD96 is an attractive key target for cancer immunotherapy. However, there has been no integrative investigation of CD96 in glioma. Our study explored the relationship between CD96 expression and clinical prognosis in glioma. Methods RNA and clinical data for a total of 1,001 samples were included in this study, including 325 samples from the Chinese Glioma Genome Atlas (CGGA) database and 676 samples from The Cancer Genome Atlas (TCGA) dataset. The R programming language was employed to perform statistical analysis and draw figures. Results CD96 had a consistently positive relationship with glioblastoma and was highly enriched in IDH-wildtype and mesenchymal subtype glioma. Gene ontology enrichment and gene set variation analysis analyses suggested that CD96 was mostly involved in immune functions and was especially related to T cell-mediated immune response in glioma. Subsequent immune infiltration analysis showed that CD96 was positively correlated with infiltrating levels of CD4 + T and CD8 + T cells, macrophages, neutrophils, and DCs in glioblastoma multiforme and low-grade glioma. Additionally, CD96 was tightly associated with other immune checkpoints, including PD-1, CTLA-4, TIGIT, and TIM-3. Univariate and multivariate Cox analysis demonstrated that CD96 acts as an independent indicator of poor prognosis in glioma. Conclusion CD96 expression was increased in malignant phenotype and negatively associated with overall survival in glioma. CD96 also showed a positive correlation with other immune checkpoints, immune response, and inflammatory activity. Our findings indicate that CD96 is a promising clinical target for further immunotherapeutic use in glioma patients.
Collapse
Affiliation(s)
- Qiang Zhang
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Hua Zhong
- College of Life Sciences, Wuhan University, Wuhan, China
| | - Yinchun Fan
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Qian Liu
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Jiancheng Song
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Shengtao Yao
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Fang Cao
- Department of Cerebrovascular Disease, Affiliated Hospital of Zunyi Medical University, Guizhou, China
| |
Collapse
|
29
|
Lu J, Van Laethem F, Saba I, Chu J, Tikhonova AN, Bhattacharya A, Singer A, Sun PD. Structure of MHC-Independent TCRs and Their Recognition of Native Antigen CD155. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2020; 204:3351-3359. [PMID: 32321756 PMCID: PMC7390066 DOI: 10.4049/jimmunol.1901084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 04/02/2020] [Indexed: 01/07/2023]
Abstract
During normal T cell development in the thymus, αβ TCRs signal immature thymocytes to differentiate into mature T cells by binding to peptide-MHC ligands together with CD4/CD8 coreceptors. Conversely, in MHC and CD4/CD8 coreceptor-deficient mice, the thymus generates mature T cells expressing MHC-independent TCRs that recognize native conformational epitopes rather than linear antigenic-peptides presented by MHC. To date, no structural information of MHC-independent TCRs is available, and their structural recognition of non-MHC ligand remains unknown. To our knowledge in this study, we determined the first structures of two murine MHC-independent TCRs (A11 and B12A) that bind with high nanomolar affinities to mouse adhesion receptor CD155. Solution binding demonstrated the Vαβ-domain is responsible for MHC-independent B12A recognition of its ligand. Analysis of A11 and B12A sequences against various MHC-restricted and -independent TCR sequence repertoires showed that individual V-genes of A11 and B12A did not exhibit preference against MHC-restriction. Likewise, CDR3 alone did not discriminate against MHC binding, suggesting VDJ recombination together with Vα/Vβ pairing determine their MHC-independent specificity for CD155. The structures of A11 and B12A TCR are nearly identical to those of MHC-restricted TCR, including the conformations of CDR1 and 2. Mutational analysis, together with negative-staining electron microscopy images, showed that the CDR regions of A11 and B12A recognized epitopes on D1 domain of CD155, a region also involved in CD155 binding to poliovirus and Tactile in human. Taken together, MHC-independent TCRs adopt canonical TCR structures to recognize native Ags, highlighting the importance of thymic selection in determining TCR ligand specificity.
Collapse
Affiliation(s)
- Jinghua Lu
- Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, Rockville, Maryland 20852
| | - François Van Laethem
- Experimental Immunology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Ingrid Saba
- Experimental Immunology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Jonathan Chu
- Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, Rockville, Maryland 20852
| | | | - Abhisek Bhattacharya
- Experimental Immunology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Alfred Singer
- Experimental Immunology Branch, National Cancer Institute, Bethesda, Maryland 20892
| | - Peter D. Sun
- Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, Rockville, Maryland 20852
| |
Collapse
|
30
|
Khan M, Arooj S, Wang H. NK Cell-Based Immune Checkpoint Inhibition. Front Immunol 2020; 11:167. [PMID: 32117298 PMCID: PMC7031489 DOI: 10.3389/fimmu.2020.00167] [Citation(s) in RCA: 212] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 01/21/2020] [Indexed: 12/12/2022] Open
Abstract
Immunotherapy, with an increasing number of therapeutic dimensions, is becoming an important mode of treatment for cancer patients. The inhibition of immune checkpoints, which are the source of immune escape for various cancers, is one such immunotherapeutic dimension. It has mainly been aimed at T cells in the past, but NK cells are a newly emerging target. Simultaneously, the number of checkpoints identified has been increasing in recent times. In addition to the classical NK cell receptors KIRs, LIRs, and NKG2A, several other immune checkpoints have also been shown to cause dysfunction of NK cells in various cancers and chronic infections. These checkpoints include the revolutionized CTLA-4, PD-1, and recently identified B7-H3, as well as LAG-3, TIGIT & CD96, TIM-3, and the most recently acknowledged checkpoint-members of the Siglecs family (Siglec-7/9), CD200 and CD47. An interesting dimension of immune checkpoints is their candidacy for dual-checkpoint inhibition, resulting in therapeutic synergism. Furthermore, the combination of immune checkpoint inhibition with other NK cell cytotoxicity restoration strategies could also strengthen its efficacy as an antitumor therapy. Here, we have undertaken a comprehensive review of the literature to date regarding NK cell-based immune checkpoints.
Collapse
Affiliation(s)
- Muhammad Khan
- Department of Oncology, The First Affiliated Hospital, Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Sumbal Arooj
- Department of Biochemistry, University of Sialkot, Sialkot, Pakistan
| | - Hua Wang
- Department of Oncology, The First Affiliated Hospital, Institute for Liver Diseases of Anhui Medical University, Hefei, China
| |
Collapse
|
31
|
O'Donnell JS, Madore J, Li XY, Smyth MJ. Tumor intrinsic and extrinsic immune functions of CD155. Semin Cancer Biol 2019; 65:189-196. [PMID: 31883911 DOI: 10.1016/j.semcancer.2019.11.013] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/06/2019] [Accepted: 11/19/2019] [Indexed: 12/11/2022]
Abstract
CD155 (PVR/necl5/Tage4), a member of the nectin-like family of adhesion molecules, is highly upregulated on tumor cells across multiple cancer types and has been associated with worse patient outcomes. In addition to well described cell-intrinsic roles promoting tumor progression and metastasis, CD155 has now been implicated in immune regulation. The role of CD155 as a potent immune ligand with diverse cell-extrinsic functions is now being defined. CD155 signaling to immune cells is mediated through interactions with the co-stimulatory immune receptor CD226 (DNAM-1) and the inhibitory checkpoint receptors TIGIT and CD96, which are differentially regulated at the cell surface on T cells and NK cells. The integration of signals from CD155 cognate receptors modifies the activity of tumor-infiltrating lymphocytes in a context-dependent manner, making CD155 an attractive target for immune-oncology. Preclinical studies suggest that targeting this axis can improve immune-mediated tumor control, particularly when combined with existing anti-PD-1 checkpoint therapies. In this review, we discuss the roles of CD155 on host and tumor cells in controlling tumor progression and discuss the possibility of targeting CD155 for cancer therapy.
Collapse
Affiliation(s)
- Jake S O'Donnell
- Cancer Immunoregulation and Immunotherapy Laboratory, QIMR Berghofer Medical Research Institute, QLD, Australia
| | - Jason Madore
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia
| | - Xian-Yang Li
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia
| | - Mark J Smyth
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia.
| |
Collapse
|
32
|
Kundapura SV, Ramagopal UA. The CC' loop of IgV domains of the immune checkpoint receptors, plays a key role in receptor:ligand affinity modulation. Sci Rep 2019; 9:19191. [PMID: 31844079 PMCID: PMC6914781 DOI: 10.1038/s41598-019-54623-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 10/31/2019] [Indexed: 12/31/2022] Open
Abstract
Antibodies targeting negative regulators of immune checkpoints have shown unprecedented and durable response against variety of malignancies. While the concept of blocking the negative regulators of the immune checkpoints using mAbs appears to be an outstanding approach, their limited effect and several drawbacks, calls for the rational design of next generation of therapeutics. Soluble isoforms of the negative regulators of immune checkpoint pathways are expressed naturally and regulate immune responses. This suggests, affinity-modified versions of these self-molecules could be effective lead molecules for immunotherapy. To obtain better insights on the hotspot regions for modification, we have analysed structures of 18 immune receptor:ligand complexes containing the IgV domain. Interestingly, this analysis reveals that the CC' loop of IgV domain, a loop which is distinct from CDRs of antibodies, plays a pivotal role in affinity modulation, which was previously not highlighted. It is noteworthy that a ~5-residue long CC' loop in a ~120 residue protein makes significant number of hydrophobic and polar interactions with its cognate ligand. The post-interaction movement of CC' loop to accommodate the incoming ligands, seems to provide additional affinity to the interactions. In silico replacement of the CC' loop of TIGIT with that of Nectin-2 and PVR followed by protein docking trials suggests a key role of the CC' loop in affinity modulation in the TIGIT/Nectin pathway. The CC' loop appears to be a hotspot for the affinity modification without affecting the specificity to their cognate receptors.
Collapse
Affiliation(s)
- Shankar V Kundapura
- Division of Biological Sciences, Poornaprajna Institute of Scientific Research, #4, 16th Cross, Sadashivnagar, Bangalore, 560080, India.,Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Udupi A Ramagopal
- Division of Biological Sciences, Poornaprajna Institute of Scientific Research, #4, 16th Cross, Sadashivnagar, Bangalore, 560080, India.
| |
Collapse
|
33
|
Berry R, Watson GM, Jonjic S, Degli-Esposti MA, Rossjohn J. Modulation of innate and adaptive immunity by cytomegaloviruses. Nat Rev Immunol 2019; 20:113-127. [PMID: 31666730 DOI: 10.1038/s41577-019-0225-5] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2019] [Indexed: 02/07/2023]
Abstract
The coordinated activities of innate and adaptive immunity are critical for effective protection against viruses. To counter this, some viruses have evolved sophisticated strategies to circumvent immune cell recognition. In particular, cytomegaloviruses encode large arsenals of molecules that seek to subvert T cell and natural killer cell function via a remarkable array of mechanisms. Consequently, these 'immunoevasins' play a fundamental role in shaping the nature of the immune system by driving the evolution of new immune receptors and recognition mechanisms. Here, we review the diverse strategies adopted by cytomegaloviruses to target immune pathways and outline the host's response.
Collapse
Affiliation(s)
- Richard Berry
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia. .,Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia. .,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.
| | - Gabrielle M Watson
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Stipan Jonjic
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, Rijeka, Croatia
| | - Mariapia A Degli-Esposti
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Centre for Experimental Immunology, Lions Eye Institute, Perth, Western Australia, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.,Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK
| |
Collapse
|
34
|
Karade SS, Mariuzza RA. How Natural Killer Cell Receptors Stick to Cell-Cell Adhesion Proteins. Structure 2019; 27:209-210. [PMID: 30726753 DOI: 10.1016/j.str.2019.01.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The cytolytic activity of NK cells is regulated by activating and inhibitory receptors, including ones that recognize cell-cell adhesion molecules. In this issue of Structure, Deuss et al. (2019) report the structure of nectin-like protein-5 bound to the NK inhibitory receptor CD96, a promising new target for cancer immunotherapy.
Collapse
Affiliation(s)
- Sharanbasappa S Karade
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
| | - Roy A Mariuzza
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA.
| |
Collapse
|
35
|
Sun H, Sun C. The Rise of NK Cell Checkpoints as Promising Therapeutic Targets in Cancer Immunotherapy. Front Immunol 2019; 10:2354. [PMID: 31681269 PMCID: PMC6812684 DOI: 10.3389/fimmu.2019.02354] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 09/18/2019] [Indexed: 12/12/2022] Open
Affiliation(s)
- Haoyu Sun
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Institute of Immunology, University of Science and Technology of China, Hefei, China
- *Correspondence: Haoyu Sun
| | - Cheng Sun
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China
- Institute of Immunology, University of Science and Technology of China, Hefei, China
- Cheng Sun
| |
Collapse
|
36
|
Niehrs A, Garcia-Beltran WF, Norman PJ, Watson GM, Hölzemer A, Chapel A, Richert L, Pommerening-Röser A, Körner C, Ozawa M, Martrus G, Rossjohn J, Lee JH, Berry R, Carrington M, Altfeld M. A subset of HLA-DP molecules serve as ligands for the natural cytotoxicity receptor NKp44. Nat Immunol 2019; 20:1129-1137. [PMID: 31358998 PMCID: PMC8370669 DOI: 10.1038/s41590-019-0448-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 06/06/2019] [Indexed: 01/25/2023]
Abstract
Natural killer (NK) cells can recognize virus-infected and stressed cells1 using activating and inhibitory receptors, many of which interact with HLA class I. Although early studies also suggested a functional impact of HLA class II on NK cell activity2,3, the NK cell receptors that specifically recognize HLA class II molecules have never been identified. We investigated whether two major families of NK cell receptors, killer-cell immunoglobulin-like receptors (KIRs) and natural cytotoxicity receptors (NCRs), contained receptors that bound to HLA class II, and identified a direct interaction between the NK cell receptor NKp44 and a subset of HLA-DP molecules, including HLA-DP401, one of the most frequent class II allotypes in white populations4. Using NKp44ζ+ reporter cells and primary human NKp44+ NK cells, we demonstrated that interactions between NKp44 and HLA-DP401 trigger functional NK cell responses. This interaction between a subset of HLA-DP molecules and NKp44 implicates HLA class II as a component of the innate immune response, much like HLA class I. It also provides a potential mechanism for the described associations between HLA-DP subtypes and several disease outcomes, including hepatitis B virus infection5-7, graft-versus-host disease8 and inflammatory bowel disease9,10.
Collapse
Affiliation(s)
- Annika Niehrs
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
- German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Hamburg, Germany
| | - Wilfredo F Garcia-Beltran
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - Paul J Norman
- Division of Biomedical Informatics and Personalized Medicine, University of Colorado School of Medicine, Aurora, CO, USA
- Department of Microbiology and Immunology, University of Colorado School of Medicine, Aurora, CO, USA
| | - Gabrielle M Watson
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Angelique Hölzemer
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
- German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Hamburg, Germany
- First Department of Internal Medicine, University Medical Center Eppendorf, Hamburg, Germany
| | - Anaïs Chapel
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
- Unité HIV Inflammation et Persistance, Institut Pasteur, Paris, France
| | - Laura Richert
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
- Inserm Inria SISTM Bordeaux Population Health Research Center UMR 1219, Univ. Bordeaux, Bordeaux, France
| | | | - Christian Körner
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | | | - Glòria Martrus
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Jamie Rossjohn
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
- Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK
| | | | - Richard Berry
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Mary Carrington
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
- Basic Science Program, HLA Immunogenetics Section, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Marcus Altfeld
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.
- German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Hamburg, Germany.
| |
Collapse
|
37
|
Deuss FA, Watson GM, Goodall KJ, Leece I, Chatterjee S, Fu Z, Thaysen-Andersen M, Andrews DM, Rossjohn J, Berry R. Structural basis for the recognition of nectin-like protein-5 by the human-activating immune receptor, DNAM-1. J Biol Chem 2019; 294:12534-12546. [PMID: 31253644 DOI: 10.1074/jbc.ra119.009261] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/27/2019] [Indexed: 11/06/2022] Open
Abstract
Nectin and nectin-like (Necl) adhesion molecules are broadly overexpressed in a wide range of cancers. By binding to these adhesion molecules, the immunoreceptors DNAX accessory molecule-1 (DNAM-1), CD96 molecule (CD96), and T-cell immunoreceptor with Ig and ITIM domains (TIGIT) play a crucial role in regulating the anticancer activities of immune effector cells. However, within this axis, it remains unclear how DNAM-1 recognizes its cognate ligands. Here, we determined the structure of human DNAM-1 in complex with nectin-like protein-5 (Necl-5) at 2.8 Å resolution. Unexpectedly, we found that the two extracellular domains (D1-D2) of DNAM-1 adopt an unconventional "collapsed" arrangement that is markedly distinct from those in other immunoglobulin-based immunoreceptors. The DNAM-1/Necl-5 interaction was underpinned by conserved lock-and-key motifs located within their respective D1 domains, but also included a distinct interface derived from DNAM-1 D2. Mutation of the signature DNAM-1 "key" motif within the D1 domain attenuated Necl-5 binding and natural killer cell-mediated cytotoxicity. Altogether, our results have implications for understanding the binding mode of an immune receptor family that is emerging as a viable candidate for cancer immunotherapy.
Collapse
Affiliation(s)
- Felix A Deuss
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Gabrielle M Watson
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Katharine J Goodall
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, Victoria 3800, Australia
| | - Isobel Leece
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, Victoria 3800, Australia
| | - Sayantani Chatterjee
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, New South Wales 2109, Australia
| | - Zhihui Fu
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Morten Thaysen-Andersen
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, New South Wales 2109, Australia
| | - Daniel M Andrews
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, Victoria 3800, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom.
| | - Richard Berry
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.
| |
Collapse
|