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Lee MS, Tuohy PJ, Kim CY, Yost PP, Lichauco K, Parrish HL, Van Doorslaer K, Kuhns MS. The CD4 transmembrane GGXXG and juxtamembrane (C/F)CV+C motifs mediate pMHCII-specific signaling independently of CD4-LCK interactions. eLife 2024; 12:RP88225. [PMID: 38639990 PMCID: PMC11031086 DOI: 10.7554/elife.88225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024] Open
Abstract
CD4+ T cell activation is driven by five-module receptor complexes. The T cell receptor (TCR) is the receptor module that binds composite surfaces of peptide antigens embedded within MHCII molecules (pMHCII). It associates with three signaling modules (CD3γε, CD3δε, and CD3ζζ) to form TCR-CD3 complexes. CD4 is the coreceptor module. It reciprocally associates with TCR-CD3-pMHCII assemblies on the outside of a CD4+ T cells and with the Src kinase, LCK, on the inside. Previously, we reported that the CD4 transmembrane GGXXG and cytoplasmic juxtamembrane (C/F)CV+C motifs found in eutherian (placental mammal) CD4 have constituent residues that evolved under purifying selection (Lee et al., 2022). Expressing mutants of these motifs together in T cell hybridomas increased CD4-LCK association but reduced CD3ζ, ZAP70, and PLCγ1 phosphorylation levels, as well as IL-2 production, in response to agonist pMHCII. Because these mutants preferentially localized CD4-LCK pairs to non-raft membrane fractions, one explanation for our results was that they impaired proximal signaling by sequestering LCK away from TCR-CD3. An alternative hypothesis is that the mutations directly impacted signaling because the motifs normally play an LCK-independent role in signaling. The goal of this study was to discriminate between these possibilities. Using T cell hybridomas, our results indicate that: intracellular CD4-LCK interactions are not necessary for pMHCII-specific signal initiation; the GGXXG and (C/F)CV+C motifs are key determinants of CD4-mediated pMHCII-specific signal amplification; the GGXXG and (C/F)CV+C motifs exert their functions independently of direct CD4-LCK association. These data provide a mechanistic explanation for why residues within these motifs are under purifying selection in jawed vertebrates. The results are also important to consider for biomimetic engineering of synthetic receptors.
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Affiliation(s)
- Mark S Lee
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
| | - Peter J Tuohy
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
| | - Caleb Y Kim
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
| | - Philip P Yost
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
| | - Katrina Lichauco
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
| | - Heather L Parrish
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
| | - Koenraad Van Doorslaer
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
- School of Animal and Comparative Biomedical Sciences, The University of ArizonaTucsonUnited States
- Cancer Biology Graduate Interdisciplinary Program and Genetics Graduate Interdisciplinary Program, The University of ArizonaTucsonUnited States
- The BIO-5 Institute, The University of ArizonaTucsonUnited States
- The University of Arizona Cancer CenterTucsonUnited States
- The Arizona Center on Aging, The University of Arizona College of MedicineTucsonUnited States
| | - Michael S Kuhns
- Department of Immunobiology, The University of Arizona College of MedicineTucsonUnited States
- Cancer Biology Graduate Interdisciplinary Program and Genetics Graduate Interdisciplinary Program, The University of ArizonaTucsonUnited States
- The BIO-5 Institute, The University of ArizonaTucsonUnited States
- The University of Arizona Cancer CenterTucsonUnited States
- The Arizona Center on Aging, The University of Arizona College of MedicineTucsonUnited States
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Lee MS, Tuohy PJ, Kim CY, Yost P, Lichauco K, Parrish HL, Van Doorslaer K, Kuhns MS. The CD4 transmembrane GGXXG and juxtamembrane (C/F)CV+C motifs mediate pMHCII-specific signaling independently of CD4-LCK interactions. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.05.539613. [PMID: 37214965 PMCID: PMC10197521 DOI: 10.1101/2023.05.05.539613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
CD4+ T cell activation is driven by 5-module receptor complexes. The T cell receptor (TCR) is the receptor module that binds composite surfaces of peptide antigens embedded within MHCII molecules (pMHCII). It associates with three signaling modules (CD3γε, CD3δε, and CD3ζζ) to form TCR-CD3 complexes. CD4 is the coreceptor module. It reciprocally associates with TCR-CD3-pMHCII assemblies on the outside of a CD4+ T cells and with the Src kinase, LCK, on the inside. Previously, we reported that the CD4 transmembrane GGXXG and cytoplasmic juxtamembrane (C/F)CV+C motifs found in eutherian (placental mammal) CD4 have constituent residues that evolved under purifying selection (Lee, et al., 2022). Expressing mutants of these motifs together in T cell hybridomas increased CD4-LCK association but reduced CD3ζ, ZAP70, and PLCγ1 phosphorylation levels, as well as IL-2 production, in response to agonist pMHCII. Because these mutants preferentially localized CD4-LCK pairs to non-raft membrane fractions, one explanation for our results was that they impaired proximal signaling by sequestering LCK away from TCR-CD3. An alternative hypothesis is that the mutations directly impacted signaling because the motifs normally play an LCK-independent role in signaling. The goal of this study was to discriminate between these possibilities. Using T cell hybridomas, our results indicate that: intracellular CD4-LCK interactions are not necessary for pMHCII-specific signal initiation; the GGXXG and (C/F)CV+C motifs are key determinants of CD4-mediated pMHCII-specific signal amplification; the GGXXG and (C/F)CV+C motifs exert their functions independently of direct CD4-LCK association. These data provide a mechanistic explanation for why residues within these motifs are under purifying selection in jawed vertebrates. The results are also important to consider for biomimetic engineering of synthetic receptors.
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Affiliation(s)
- Mark S Lee
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Peter J Tuohy
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Caleb Y Kim
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Philip Yost
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Katrina Lichauco
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Heather L Parrish
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Koenraad Van Doorslaer
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
- School of Animal and Comparative Biomedical Sciences, The University of Arizona, Tucson, AZ 85724, USA
- Cancer Biology Graduate Interdisciplinary Program and Genetics Graduate Interdisciplinary Program, The University of Arizona, Tucson, AZ 85724, USA
- The BIO-5 Institute, The University of Arizona, Tucson, AZ 85724, USA
- The University of Arizona Cancer Center, Tucson, AZ, USA
- The Arizona Center on Aging, The University of Arizona College of Medicine, Tucson, AZ, USA
| | - Michael S Kuhns
- Department of Immunobiology, The University of Arizona College of Medicine, Tucson, AZ 85724, USA
- Cancer Biology Graduate Interdisciplinary Program and Genetics Graduate Interdisciplinary Program, The University of Arizona, Tucson, AZ 85724, USA
- The BIO-5 Institute, The University of Arizona, Tucson, AZ 85724, USA
- The University of Arizona Cancer Center, Tucson, AZ, USA
- The Arizona Center on Aging, The University of Arizona College of Medicine, Tucson, AZ, USA
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The Impact of the Ca 2+-Independent Phospholipase A 2β (iPLA 2β) on Immune Cells. Biomolecules 2021; 11:biom11040577. [PMID: 33920898 PMCID: PMC8071342 DOI: 10.3390/biom11040577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/06/2021] [Accepted: 04/12/2021] [Indexed: 12/31/2022] Open
Abstract
The Ca2+-independent phospholipase A2β (iPLA2β) is a member of the PLA2 family that has been proposed to have roles in multiple biological processes including membrane remodeling, cell proliferation, bone formation, male fertility, cell death, and signaling. Such involvement has led to the identification of iPLA2β activation in several diseases such as cancer, cardiovascular abnormalities, glaucoma, periodontitis, neurological disorders, diabetes, and other metabolic disorders. More recently, there has been heightened interest in the role that iPLA2β plays in promoting inflammation. Recognizing the potential contribution of iPLA2β in the development of autoimmune diseases, we review this issue in the context of an iPLA2β link with macrophages and T-cells.
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Liu Z, Li JP, Chen M, Wu M, Shi Y, Li W, Teijaro JR, Wu P. Detecting Tumor Antigen-Specific T Cells via Interaction-Dependent Fucosyl-Biotinylation. Cell 2020; 183:1117-1133.e19. [PMID: 33096019 DOI: 10.1016/j.cell.2020.09.048] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 07/27/2020] [Accepted: 09/18/2020] [Indexed: 02/07/2023]
Abstract
Re-activation and clonal expansion of tumor-specific antigen (TSA)-reactive T cells are critical to the success of checkpoint blockade and adoptive transfer of tumor-infiltrating lymphocyte (TIL)-based therapies. There are no reliable markers to specifically identify the repertoire of TSA-reactive T cells due to their heterogeneous composition. We introduce FucoID as a general platform to detect endogenous antigen-specific T cells for studying their biology. Through this interaction-dependent labeling approach, intratumoral TSA-reactive CD4+, CD8+ T cells, and TSA-suppressive CD4+ T cells can be detected and separated from bystander T cells based on their cell-surface enzymatic fucosyl-biotinylation. Compared to bystander TILs, TSA-reactive TILs possess a distinct T cell receptor (TCR) repertoire and unique gene features. Although exhibiting a dysfunctional phenotype, TSA-reactive CD8+ TILs possess substantial capabilities of proliferation and tumor-specific killing. Featuring genetic manipulation-free procedures and a quick turnover cycle, FucoID should have the potential of accelerating the pace of personalized cancer treatment.
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Affiliation(s)
- Zilei Liu
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Jie P Li
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA; State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Mingkuan Chen
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Mengyao Wu
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA; Department of Oncology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Yujie Shi
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Wei Li
- Department of Oncology, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - John R Teijaro
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Peng Wu
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Yvan-Charvet L, Bonacina F, Guinamard RR, Norata GD. Immunometabolic function of cholesterol in cardiovascular disease and beyond. Cardiovasc Res 2020; 115:1393-1407. [PMID: 31095280 DOI: 10.1093/cvr/cvz127] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 03/20/2019] [Accepted: 05/07/2019] [Indexed: 12/16/2022] Open
Abstract
Inflammation represents the driving feature of many diseases, including atherosclerosis, cancer, autoimmunity and infections. It is now established that metabolic processes shape a proper immune response and within this context the alteration in cellular cholesterol homeostasis has emerged as a culprit of many metabolic abnormalities observed in chronic inflammatory diseases. Cholesterol accumulation supports the inflammatory response of myeloid cells (i.e. augmentation of toll-like receptor signalling, inflammasome activation, and production of monocytes and neutrophils) which is beneficial in the response to infections, but worsens diseases associated with chronic metabolic inflammation including atherosclerosis. In addition to the innate immune system, cells of adaptive immunity, upon activation, have also been shown to undergo a reprogramming of cellular cholesterol metabolism, which results in the amplification of inflammatory responses. Aim of this review is to discuss (i) the molecular mechanisms linking cellular cholesterol metabolism to specific immune functions; (ii) how cellular cholesterol accumulation sustains chronic inflammatory diseases such as atherosclerosis; (iii) the immunometabolic profile of patients with defects of genes affecting cholesterol metabolism including familial hypercholesterolaemia, cholesteryl ester storage disease, Niemann-Pick type C, and immunoglobulin D syndrome/mevalonate kinase deficiency. Available data indicate that cholesterol immunometabolism plays a key role in directing immune cells function and set the stage for investigating the repurposing of existing 'metabolic' drugs to modulate the immune response.
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Affiliation(s)
- Laurent Yvan-Charvet
- Institut National de la Santé et de la Recherche Médicale (Inserm) U1065, Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Fédération Hospitalo-Universitaire (FHU) Oncoage, Nice, France
| | - Fabrizia Bonacina
- Department of Excellence of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Rodolphe Renè Guinamard
- Institut National de la Santé et de la Recherche Médicale (Inserm) U1065, Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Fédération Hospitalo-Universitaire (FHU) Oncoage, Nice, France
| | - Giuseppe Danilo Norata
- Institut National de la Santé et de la Recherche Médicale (Inserm) U1065, Université Côte d'Azur, Centre Méditerranéen de Médecine Moléculaire (C3M), Fédération Hospitalo-Universitaire (FHU) Oncoage, Nice, France.,Center for the Study of Atherosclerosis, E. Bassini Hospital, Cinisello Balsamo, Milan, Italy
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Zhang H, Dong S, Li Z, Feng X, Xu W, Tulinao CMS, Jiang Y, Ding J. Biointerface engineering nanoplatforms for cancer-targeted drug delivery. Asian J Pharm Sci 2019; 15:397-415. [PMID: 32952666 PMCID: PMC7486517 DOI: 10.1016/j.ajps.2019.11.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/22/2019] [Accepted: 11/18/2019] [Indexed: 12/30/2022] Open
Abstract
Over the past decade, nanoparticle-based therapeutic modalities have become promising strategies in cancer therapy. Selective delivery of anticancer drugs to the lesion sites is critical for elimination of the tumor and an improved prognosis. Innovative design and advanced biointerface engineering have promoted the development of various nanocarriers for optimized drug delivery. Keeping in mind the biological framework of the tumor microenvironment, biomembrane-camouflaged nanoplatforms have been a research focus, reflecting their superiority in cancer targeting. In this review, we summarize the development of various biomimetic cell membrane-camouflaged nanoplatforms for cancer-targeted drug delivery, which are classified according to the membranes from different cells. The challenges and opportunities of the advanced biointerface engineering drug delivery nanosystems in cancer therapy are discussed.
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Affiliation(s)
- Huaiyu Zhang
- Department of Gastrointestinal Colorectal and Anal Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China.,Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Shujun Dong
- VIP Integrated Department, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Zhongmin Li
- Department of Gastrointestinal Colorectal and Anal Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China.,Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Xiangru Feng
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Weiguo Xu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Catrina Mae S Tulinao
- Far Eastern University-Nicanor Reyes Medical Foundation, Quezon City 1118, Philippines
| | - Yang Jiang
- Department of Gastrointestinal Colorectal and Anal Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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