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Cao TP, Shahine A, Cox LR, Besra GS, Moody DB, Rossjohn J. A structural perspective of how T cell receptors recognise the CD1 family of lipid antigen-presenting molecules. J Biol Chem 2024:107511. [PMID: 38945451 DOI: 10.1016/j.jbc.2024.107511] [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: 03/20/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/02/2024] Open
Abstract
The CD1 family of antigen-presenting molecules adopt a Major Histocompatibility Complex class I (MHC-I) fold. Whereas MHC molecules present peptides, the CD1 family has evolved to bind self- and foreign-lipids. The CD1 family of antigen-presenting molecules comprises four members, CD1a, CD1b, CD1c, CD1d, that differ in their architecture around the lipid-binding cleft, thereby enabling diverse lipids to be accommodated. These CD1-lipid complexes are recognised by T cell receptors (TCRs) expressed on T cells, either through dual recognition of CD1 and lipid or in a new model whereby the TCR directly contacts CD1, thereby triggering an immune response. Chemical syntheses of lipid antigens, and analogues thereof, have been crucial in understanding the underlying specificity of T cell-mediated lipid immunity. This review will focus on our current understanding of how TCRs interact with CD1-lipid complexes, highlighting how it can be fundamentally different from TCR-MHC-peptide co-recognition.
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Affiliation(s)
- Thinh-Phat Cao
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Adam Shahine
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Liam R Cox
- School of Chemistry, University of Birmingham, Birmingham, United Kingdom
| | - Gurdyal S Besra
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - D Branch Moody
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, UK.
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Maerz MD, Cross DL, Seshadri C. Functional and biological implications of clonotypic diversity among human donor-unrestricted T cells. Immunol Cell Biol 2024. [PMID: 38659280 DOI: 10.1111/imcb.12751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/04/2024] [Accepted: 04/04/2024] [Indexed: 04/26/2024]
Abstract
T cells express a T-cell receptor (TCR) heterodimer that is the product of germline rearrangement and junctional editing resulting in immense clonotypic diversity. The generation of diverse TCR repertoires enables the recognition of pathogen-derived peptide antigens presented by polymorphic major histocompatibility complex (MHC) molecules. However, T cells also recognize nonpeptide antigens through nearly monomorphic antigen-presenting systems, such as cluster of differentiation 1 (CD1), MHC-related protein 1 (MR1) and butyrophilins (BTNs). This potential for shared immune responses across genetically diverse populations led to their designation as donor-unrestricted T cells (DURTs). As might be expected, some CD1-, MR1- and BTN-restricted T cells express a TCR that is conserved across unrelated individuals. However, several recent studies have reported unexpected diversity among DURT TCRs, and increasing evidence suggests that this diversity has functional consequences. Recent reports also challenge the dogma that immune cells are either innate or adaptive and suggest that DURT TCRs may act in both capacities. Here, we review this evidence and propose an expanded view of the role for clonotypic diversity among DURTs in humans, including new perspectives on how DURT TCRs may integrate their adaptive and innate immune functions.
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Affiliation(s)
- Megan D Maerz
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Molecular Medicine and Mechanisms of Disease Program, Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Deborah L Cross
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Chetan Seshadri
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
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Li D, Qin J, Zhou T, Li Y, Cheng X, Chen Z, Chen J, Zheng WV. Bispecific GPC3/PD‑1 CAR‑T cells for the treatment of HCC. Int J Oncol 2023; 62:53. [PMID: 36896779 PMCID: PMC10019756 DOI: 10.3892/ijo.2023.5501] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 09/06/2022] [Indexed: 03/11/2023] Open
Abstract
Constantly stimulated by the tumor microenvironment (TME), programmed death 1 (PD‑1) is elevated, and it interacts with PD ligand 1 (PD‑L1), rendering chimeric antigen receptor (CAR)‑T cells dysfunctional. Hence, CAR‑T cells immune to PD‑1‑induced immunosuppression were constructed to improve the function of CAR‑T cells in hepatocellular carcinoma (HCC). Double‑target CAR‑T cells, targeting glypican‑3 (GPC3) [a tumour-associated antigen (TAA)] and hindering PD‑1‑PD‑L1 binding, were established. The expression of GPC3, PD‑L1, and inhibitory receptors was measured using flow cytometry. The cytotoxicity, cytokine release, and differentiation level of CAR‑T cells were determined using lactate dehydrogenase release assay, enzyme‑linked immunosorbent assay, and flow cytometry, respectively. HCC cells were targeted and eliminated by double‑target CAR‑T cells. These double‑target CAR‑T cells limit PD‑1‑PD‑L1 binding and sustain cytotoxicity to PD‑L1+ HCC cells. The relatively low IR expression and differentiation level in double‑target CAR‑T cells in tumour tissues induced tumour‑suppression and extended survival in PD‑L1+ HCC TX models, as opposed to their single‑target counterparts. The results of the present study suggested that the newly constructed double‑target CAR‑T cells exhibit stronger tumour‑suppressing effects in HCC than their single‑target counterparts, which are common, suggesting the potential of strengthening CAR‑T cell activity in HCC treatment.
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Affiliation(s)
- Dezhi Li
- Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
| | - Jie Qin
- Department of Scientific and Research, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
| | - Tao Zhou
- Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
| | - Yaqin Li
- Department of Infectious Disease, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
| | - Xianyi Cheng
- Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
| | - Zaizhong Chen
- Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
| | - Junhui Chen
- Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
- Correspondence to: Dr Junhui Chen or Dr Wei V. Zheng, Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, Guangdong 518036, P.R. China, E-mail: , E-mail:
| | - Wei V. Zheng
- Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
- Correspondence to: Dr Junhui Chen or Dr Wei V. Zheng, Intervention and Cell Therapy Center, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, Guangdong 518036, P.R. China, E-mail: , E-mail:
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CD1 and MR1: An update after a long-awaited reunion. Immunity 2022; 55:2211-2216. [PMID: 36516812 DOI: 10.1016/j.immuni.2022.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/10/2022] [Accepted: 11/17/2022] [Indexed: 12/14/2022]
Abstract
CD1 molecules and the MHC-related protein 1 (MR1) present lipid and small molecule antigens, respectively, for T cell surveillance. The biology of these molecules, the antigens they present, and the T cells that respond to them were recently discussed during the 12th International CD1-MR1 Meeting held in Gothenburg, Sweden.
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Molvi Z, O'Reilly RJ. Allogeneic Tumor Antigen-Specific T Cells for Broadly Applicable Adoptive Cell Therapy of Cancer. Cancer Treat Res 2022; 183:131-159. [PMID: 35551658 DOI: 10.1007/978-3-030-96376-7_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
T cells specific for major histocompatibility complex (MHC)-presented tumor antigens are capable of inducing durable remissions when adoptively transferred to patients with refractory cancers presenting such antigens. When such T cells are derived from healthy donors, they can be banked for off-the-shelf administration in appropriately tissue matched patients. Therefore, tumor antigen-specific, donor-derived T cells are expected to be a mainstay in the cancer immunotherapy armamentarium. In this chapter, we analyze clinical evidence that tumor antigen-specific donor-derived T cells can induce tumor regressions when administered to appropriately matched patients whose tumors are refractory to standard therapy. We also delineate the landscape of MHC-presented and unconventional tumor antigens recognized by T cells in healthy individuals that have been targeted for adoptive T cell therapy, as well as emerging antigens for which mounting evidence suggests their utility as targets for adoptive T cell therapy. We discuss the growing technological advancements that have facilitated sequence identification of such antigens and their cognate T cells, and applicability of such technologies in the pre-clinical and clinical settings.
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Affiliation(s)
- Zaki Molvi
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
| | - Richard J O'Reilly
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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