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Yao Z, Zeng Y, Liu C, Jin H, Wang H, Zhang Y, Ding C, Chen G, Wu D. Focusing on CD8 + T-cell phenotypes: improving solid tumor therapy. J Exp Clin Cancer Res 2024; 43:266. [PMID: 39342365 PMCID: PMC11437975 DOI: 10.1186/s13046-024-03195-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2024] [Accepted: 09/17/2024] [Indexed: 10/01/2024] Open
Abstract
Vigorous CD8+ T cells play a crucial role in recognizing tumor cells and combating solid tumors. How T cells efficiently recognize and target tumor antigens, and how they maintain the activity in the "rejection" of solid tumor microenvironment, are major concerns. Recent advances in understanding of the immunological trajectory and lifespan of CD8+ T cells have provided guidance for the design of more optimal anti-tumor immunotherapy regimens. Here, we review the newly discovered methods to enhance the function of CD8+ T cells against solid tumors, focusing on optimizing T cell receptor (TCR) expression, improving antigen recognition by engineered T cells, enhancing signal transduction of the TCR-CD3 complex, inducing the homing of polyclonal functional T cells to tumors, reversing T cell exhaustion under chronic antigen stimulation, and reprogramming the energy and metabolic pathways of T cells. We also discuss how to participate in the epigenetic changes of CD8+ T cells to regulate two key indicators of anti-tumor responses, namely effectiveness and persistence.
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Affiliation(s)
- Zhouchi Yao
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital, Laboratory of Structural Immunology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Yayun Zeng
- Department of Histology and Embryology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Cheng Liu
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital, Laboratory of Structural Immunology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Huimin Jin
- Department of Histology and Embryology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Hong Wang
- Department of Scientific Research, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, 121001, China
| | - Yue Zhang
- Department of Histology and Embryology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Chengming Ding
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital, Laboratory of Structural Immunology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Guodong Chen
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital, Laboratory of Structural Immunology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Daichao Wu
- Department of Hepatopancreatobiliary Surgery, The First Affiliated Hospital, Laboratory of Structural Immunology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
- Department of Histology and Embryology, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
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Hernandez-Lara MA, Richard J, Deshpande DA. Diacylglycerol kinase is a keystone regulator of signaling relevant to the pathophysiology of asthma. Am J Physiol Lung Cell Mol Physiol 2024; 327:L3-L18. [PMID: 38742284 PMCID: PMC11380957 DOI: 10.1152/ajplung.00091.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/05/2024] [Accepted: 04/23/2024] [Indexed: 05/16/2024] Open
Abstract
Signal transduction by G protein-coupled receptors (GPCRs), receptor tyrosine kinases (RTKs) and immunoreceptors converge at the activation of phospholipase C (PLC) for the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2) into inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG). This is a point for second-messenger bifurcation where DAG via protein kinase C (PKC) and IP3 via calcium activate distinct protein targets and regulate cellular functions. IP3 signaling is regulated by multiple calcium influx and efflux proteins involved in calcium homeostasis. A family of lipid kinases belonging to DAG kinases (DGKs) converts DAG to phosphatidic acid (PA), negatively regulating DAG signaling and pathophysiological functions. PA, through a series of biochemical reactions, is recycled to produce new molecules of PIP2. Therefore, DGKs act as a central switch in terminating DAG signaling and resynthesis of membrane phospholipids precursor. Interestingly, calcium and PKC regulate the activation of α and ζ isoforms of DGK that are predominantly expressed in airway and immune cells. Thus, DGK forms a feedback and feedforward control point and plays a crucial role in fine-tuning phospholipid stoichiometry, signaling, and functions. In this review, we discuss the previously underappreciated complex and intriguing DAG/DGK-driven mechanisms in regulating cellular functions associated with asthma, such as contraction and proliferation of airway smooth muscle (ASM) cells and inflammatory activation of immune cells. We highlight the benefits of manipulating DGK activity in mitigating salient features of asthma pathophysiology and shed light on DGK as a molecule of interest for heterogeneous diseases such as asthma.
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Affiliation(s)
- Miguel A Hernandez-Lara
- Department of Medicine, Center for Translational Medicine, Jane & Leonard Korman Respiratory Institute, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
| | - Joshua Richard
- Department of Medicine, Center for Translational Medicine, Jane & Leonard Korman Respiratory Institute, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
| | - Deepak A Deshpande
- Department of Medicine, Center for Translational Medicine, Jane & Leonard Korman Respiratory Institute, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
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3
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Hodapp SJ, Gravel N, Kannan N, Newton AC. Cancer-associated mutations in protein kinase C theta are loss-of-function. Biochem J 2024; 481:759-775. [PMID: 38752473 PMCID: PMC11346454 DOI: 10.1042/bcj20240148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/14/2024] [Accepted: 05/16/2024] [Indexed: 06/11/2024]
Abstract
The Ca2+-independent, but diacylglycerol-regulated, novel protein kinase C (PKC) theta (θ) is highly expressed in hematopoietic cells where it participates in immune signaling and platelet function. Mounting evidence suggests that PKCθ may be involved in cancer, particularly blood cancers, breast cancer, and gastrointestinal stromal tumors, yet how to target this kinase (as an oncogene or as a tumor suppressor) has not been established. Here, we examine the effect of four cancer-associated mutations, R145H/C in the autoinhibitory pseudosubstrate, E161K in the regulatory C1A domain, and R635W in the regulatory C-terminal tail, on the cellular activity and stability of PKCθ. Live-cell imaging studies using the genetically-encoded fluorescence resonance energy transfer-based reporter for PKC activity, C kinase activity reporter 2 (CKAR2), revealed that the pseudosubstrate and C1A domain mutations impaired autoinhibition to increase basal signaling. This impaired autoinhibition resulted in decreased stability of the protein, consistent with the well-characterized behavior of Ca2+-regulated PKC isozymes wherein mutations that impair autoinhibition are paradoxically loss-of-function because the mutant protein is degraded. In marked contrast, the C-terminal tail mutation resulted in enhanced autoinhibition and enhanced stability. Thus, the examined mutations were loss-of-function by different mechanisms: mutations that impaired autoinhibition promoted the degradation of PKC, and those that enhanced autoinhibition stabilized an inactive PKC. Supporting a general loss-of-function of PKCθ in cancer, bioinformatics analysis revealed that protein levels of PKCθ are reduced in diverse cancers, including lung, renal, head and neck, and pancreatic. Our results reveal that PKCθ function is lost in cancer.
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Affiliation(s)
- Stefanie J. Hodapp
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, U.S.A
- Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Nathan Gravel
- Department of Biochemistry and Molecular Biology and Institute of Bioinformatics, University of Georgia, Athens, GA 30602, U.S.A
| | - Natarajan Kannan
- Department of Biochemistry and Molecular Biology and Institute of Bioinformatics, University of Georgia, Athens, GA 30602, U.S.A
| | - Alexandra C. Newton
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, U.S.A
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4
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Mbonye U, Karn J. The cell biology of HIV-1 latency and rebound. Retrovirology 2024; 21:6. [PMID: 38580979 PMCID: PMC10996279 DOI: 10.1186/s12977-024-00639-w] [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: 04/07/2024] Open
Abstract
Transcriptionally latent forms of replication-competent proviruses, present primarily in a small subset of memory CD4+ T cells, pose the primary barrier to a cure for HIV-1 infection because they are the source of the viral rebound that almost inevitably follows the interruption of antiretroviral therapy. Over the last 30 years, many of the factors essential for initiating HIV-1 transcription have been identified in studies performed using transformed cell lines, such as the Jurkat T-cell model. However, as highlighted in this review, several poorly understood mechanisms still need to be elucidated, including the molecular basis for promoter-proximal pausing of the transcribing complex and the detailed mechanism of the delivery of P-TEFb from 7SK snRNP. Furthermore, the central paradox of HIV-1 transcription remains unsolved: how are the initial rounds of transcription achieved in the absence of Tat? A critical limitation of the transformed cell models is that they do not recapitulate the transitions between active effector cells and quiescent memory T cells. Therefore, investigation of the molecular mechanisms of HIV-1 latency reversal and LRA efficacy in a proper physiological context requires the utilization of primary cell models. Recent mechanistic studies of HIV-1 transcription using latently infected cells recovered from donors and ex vivo cellular models of viral latency have demonstrated that the primary blocks to HIV-1 transcription in memory CD4+ T cells are restrictive epigenetic features at the proviral promoter, the cytoplasmic sequestration of key transcription initiation factors such as NFAT and NF-κB, and the vanishingly low expression of the cellular transcription elongation factor P-TEFb. One of the foremost schemes to eliminate the residual reservoir is to deliberately reactivate latent HIV-1 proviruses to enable clearance of persisting latently infected cells-the "Shock and Kill" strategy. For "Shock and Kill" to become efficient, effective, non-toxic latency-reversing agents (LRAs) must be discovered. Since multiple restrictions limit viral reactivation in primary cells, understanding the T-cell signaling mechanisms that are essential for stimulating P-TEFb biogenesis, initiation factor activation, and reversing the proviral epigenetic restrictions have become a prerequisite for the development of more effective LRAs.
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Affiliation(s)
- Uri Mbonye
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA.
| | - Jonathan Karn
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA.
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5
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Guo Q, Jin Y, Chen X, Ye X, Shen X, Lin M, Zeng C, Zhou T, Zhang J. NF-κB in biology and targeted therapy: new insights and translational implications. Signal Transduct Target Ther 2024; 9:53. [PMID: 38433280 PMCID: PMC10910037 DOI: 10.1038/s41392-024-01757-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/16/2024] [Accepted: 01/19/2024] [Indexed: 03/05/2024] Open
Abstract
NF-κB signaling has been discovered for nearly 40 years. Initially, NF-κB signaling was identified as a pivotal pathway in mediating inflammatory responses. However, with extensive and in-depth investigations, researchers have discovered that its role can be expanded to a variety of signaling mechanisms, biological processes, human diseases, and treatment options. In this review, we first scrutinize the research process of NF-κB signaling, and summarize the composition, activation, and regulatory mechanism of NF-κB signaling. We investigate the interaction of NF-κB signaling with other important pathways, including PI3K/AKT, MAPK, JAK-STAT, TGF-β, Wnt, Notch, Hedgehog, and TLR signaling. The physiological and pathological states of NF-κB signaling, as well as its intricate involvement in inflammation, immune regulation, and tumor microenvironment, are also explicated. Additionally, we illustrate how NF-κB signaling is involved in a variety of human diseases, including cancers, inflammatory and autoimmune diseases, cardiovascular diseases, metabolic diseases, neurological diseases, and COVID-19. Further, we discuss the therapeutic approaches targeting NF-κB signaling, including IKK inhibitors, monoclonal antibodies, proteasome inhibitors, nuclear translocation inhibitors, DNA binding inhibitors, TKIs, non-coding RNAs, immunotherapy, and CAR-T. Finally, we provide an outlook for research in the field of NF-κB signaling. We hope to present a stereoscopic, comprehensive NF-κB signaling that will inform future research and clinical practice.
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Affiliation(s)
- Qing Guo
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yizi Jin
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xinyu Chen
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med-X Stem Cell Research Center, Shanghai Cancer Institute & Department of Urology, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200127, PR China
| | - Xiaomin Ye
- Department of Cardiology, the First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, China
| | - Xin Shen
- Department of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Mingxi Lin
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Cheng Zeng
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Teng Zhou
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jian Zhang
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China.
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.
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Crosignani S, Campos S, Bouix-Peter C, Harris C, Talbot E, Hu H, Wang S, Maclean J, Zanelli U, Taylor S, Foote K, Hacini-Rachinel F, Nicodeme E, Julia V. Discovery of a novel series of selective macrocyclic PKCTheta inhibitors. Bioorg Med Chem Lett 2024; 100:129630. [PMID: 38307441 DOI: 10.1016/j.bmcl.2024.129630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 01/20/2024] [Accepted: 01/27/2024] [Indexed: 02/04/2024]
Abstract
A series of macrocyclic PKCθ inhibitors based on a 1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one hinge binder has been studied. Different aromatic and heteroaromatic substituents have been explored in order to optimize potency, isoform selectivity as well as DMPK properties. The importance of the length of the macrocyclic linker has also been analyzed. In particular, it has been found that methyl substitutions on the linker can have a profound influence on both potency and metabolic stability. Several compounds showing very good profiles, suitable for in vivo testing, are disclosed.
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Affiliation(s)
| | - Sebastien Campos
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | | | - Craig Harris
- Galderma SA, Av. d'Ouchy 4, 1006 Lausanne, Switzerland
| | - Eric Talbot
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | - Haiyang Hu
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | - Shun Wang
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | - John Maclean
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | - Ugo Zanelli
- Galderma SA, Av. d'Ouchy 4, 1006 Lausanne, Switzerland
| | - Simon Taylor
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | - Kevin Foote
- Pharmaron Discovery & Early Development, West Hill Innovation Park, Hertford Road, Hoddesdon, Hertfordshire EN11 9FH, UK
| | | | | | - Valerie Julia
- Galderma SA, Av. d'Ouchy 4, 1006 Lausanne, Switzerland
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7
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Kazanietz MG, Cooke M. Protein kinase C signaling "in" and "to" the nucleus: Master kinases in transcriptional regulation. J Biol Chem 2024; 300:105692. [PMID: 38301892 PMCID: PMC10907189 DOI: 10.1016/j.jbc.2024.105692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 02/03/2024] Open
Abstract
PKC is a multifunctional family of Ser-Thr kinases widely implicated in the regulation of fundamental cellular functions, including proliferation, polarity, motility, and differentiation. Notwithstanding their primary cytoplasmic localization and stringent activation by cell surface receptors, PKC isozymes impel prominent nuclear signaling ultimately impacting gene expression. While transcriptional regulation may be wielded by nuclear PKCs, it most often relies on cytoplasmic phosphorylation events that result in nuclear shuttling of PKC downstream effectors, including transcription factors. As expected from the unique coupling of PKC isozymes to signaling effector pathways, glaring disparities in gene activation/repression are observed upon targeting individual PKC family members. Notably, specific PKCs control the expression and activation of transcription factors implicated in cell cycle/mitogenesis, epithelial-to-mesenchymal transition and immune function. Additionally, PKCs isozymes tightly regulate transcription factors involved in stepwise differentiation of pluripotent stem cells toward specific epithelial, mesenchymal, and hematopoietic cell lineages. Aberrant PKC expression and/or activation in pathological conditions, such as in cancer, leads to profound alterations in gene expression, leading to an extensive rewiring of transcriptional networks associated with mitogenesis, invasiveness, stemness, and tumor microenvironment dysregulation. In this review, we outline the current understanding of PKC signaling "in" and "to" the nucleus, with significant focus on established paradigms of PKC-mediated transcriptional control. Dissecting these complexities would allow the identification of relevant molecular targets implicated in a wide spectrum of diseases.
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Affiliation(s)
- Marcelo G Kazanietz
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - Mariana Cooke
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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8
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Rodolfi S, Davidson C, Vecellio M. Regulatory T cells in spondyloarthropathies: genetic evidence, functional role, and therapeutic possibilities. Front Immunol 2024; 14:1303640. [PMID: 38288110 PMCID: PMC10822883 DOI: 10.3389/fimmu.2023.1303640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/28/2023] [Indexed: 01/31/2024] Open
Abstract
Regulatory T cells (Tregs) are a very specialized subset of T lymphocytes: their main function is controlling immune responses during inflammation. T-regs involvement in autoimmune and immune-mediated rheumatic diseases is well-described. Here, we critically review the up-to-date literature findings on the role of Tregs in spondyloarthropathies, particularly in ankylosing spondylitis (AS), a polygenic inflammatory rheumatic disease that preferentially affects the spine and the sacroiliac joints. Genetics discoveries helped in elucidating pathogenic T-regs gene modules and functional involvement. We highlight T-regs tissue specificity as crucial point, as T-regs might have a distinct epigenomic and molecular profiling depending on the different site of tissue inflammation. Furthermore, we speculate about possible therapeutic interventions targeting, or enhancing, Treg cells in spondyloarthropathies.
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Affiliation(s)
- Stefano Rodolfi
- Department of Rheumatology and Clinical Immunology, IRCCS Humanitas Research Hospital, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Milan, Italy
| | - Connor Davidson
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Matteo Vecellio
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
- Centro Ricerche Fondazione Italiana Ricerca Sull’Artrite (FIRA), Fondazione Pisana per la Scienza ONLUS, San Giuliano Terme, Italy
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9
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Khantakova JN, Sennikov SV. T-helper cells flexibility: the possibility of reprogramming T cells fate. Front Immunol 2023; 14:1284178. [PMID: 38022605 PMCID: PMC10646684 DOI: 10.3389/fimmu.2023.1284178] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/12/2023] [Indexed: 12/01/2023] Open
Abstract
Various disciplines cooperate to find novel approaches to cure impaired body functions by repairing, replacing, or regenerating cells, tissues, or organs. The possibility that a stable differentiated cell can reprogram itself opens the door to new therapeutic strategies against a multitude of diseases caused by the loss or dysfunction of essential, irreparable, and specific cells. One approach to cell therapy is to induce reprogramming of adult cells into other functionally active cells. Understanding the factors that cause or contribute to T cell plasticity is not only of clinical importance but also expands the knowledge of the factors that induce cells to differentiate and improves the understanding of normal developmental biology. The present review focuses on the advances in the conversion of peripheral CD4+ T cells, the conditions of their reprogramming, and the methods proposed to control such cell differentiation.
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Affiliation(s)
- Julia N. Khantakova
- Department of Molecular Immunology, Federal State Budgetary Scientific Institution “Research Institute of Fundamental and Clinical Immunology” (RIFCI), Novosibirsk, Russia
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10
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Eldeeb MA, Zhou W, Esmaili M, Elgohary AM, Wei H, Fahlman RP. N-degron-mediated degradation of the proteolytically activated form of PKC-theta kinase attenuates its pro-apoptotic function. Cell Signal 2023; 110:110830. [PMID: 37516395 DOI: 10.1016/j.cellsig.2023.110830] [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: 05/22/2023] [Revised: 07/04/2023] [Accepted: 07/26/2023] [Indexed: 07/31/2023]
Abstract
Cellular signalling cues lead to the initiation of apoptotic pathways and often result in the activation of caspases which in turn cause the generation of proteolytically generated protein fragments with new or altered functions. Mounting number of studies reveal that the activity of these proteolytically activated protein fragments can be counteracted via their selective degradation by the N-degron degradation pathways. Here, we investigate the proteolytically generated fragment of the PKC theta kinase, where we demonstrate the first report on the stability of this pro-apoptotic protein fragment. We have determined that the pro-apoptotic cleaved fragment of PKC-theta is unstable in cells because its N-terminal lysine targets it for proteasomal degradation via the N-degron degradation pathway and this degradation is inhibited by mutating the destabilizing N-termini, knockdown of the UBR1 and UBR2 E3 ligases. Tellingly, we demonstrate that the metabolic stabilization of the cleaved fragment of PKC-theta or inhibition of the N-degron degradation augments the apoptosis-inducing effect of staurosporine in Jurkat cells. Notably, we have unveiled that the cleaved fragment of PKC theta, per se, can induce apoptotic cell death in Jurkat T-cell leukemia. Our results expand the functional scope of mammalian N-degron degradation pathways, and support the notion that targeting N-degron degradation machinery may have promising therapeutic implications in cancer cells.
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Affiliation(s)
- Mohamed A Eldeeb
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada; Department of Neurology, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada.
| | - Wenbin Zhou
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, China
| | - Mansoore Esmaili
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Alaa M Elgohary
- Biophysics department, Faculty of science, Cairo University, Egypt
| | - Hai Wei
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, China
| | - Richard P Fahlman
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada.
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11
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Xiao Q, Wang D, Li D, Huang J, Ma F, Zhang H, Sheng Y, Zhang C, Ha X. Protein kinase C: A potential therapeutic target for endothelial dysfunction in diabetes. J Diabetes Complications 2023; 37:108565. [PMID: 37540984 DOI: 10.1016/j.jdiacomp.2023.108565] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/13/2023] [Accepted: 07/22/2023] [Indexed: 08/06/2023]
Abstract
Protein kinase C (PKC) is a family of serine/threonine protein kinases that play an important role in many organs and systems and whose activation contributes significantly to endothelial dysfunction in diabetes. The increase in diacylglycerol (DAG) under high glucose conditions mediates PKC activation and synthesis, which stimulates oxidative stress and inflammation, resulting in impaired endothelial cell function. This article reviews the contribution of PKC to the development of diabetes-related endothelial dysfunction and summarizes the drugs that inhibit PKC activation, with the aim of exploring therapeutic modalities that may alleviate endothelial dysfunction in diabetic patients.
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Affiliation(s)
- Qian Xiao
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China
| | - Dan Wang
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China
| | - Danyang Li
- School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China
| | - Jing Huang
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China
| | - Feifei Ma
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; College of Veterinary Medicine, Gansu Agriculture University, Lanzhou 730070, Gansu, China
| | - Haocheng Zhang
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; The Second School of Clinical Medicine, Lanzhou University, Lanzhou, 730030, Gansu, China
| | - Yingda Sheng
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China
| | - Caimei Zhang
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China
| | - Xiaoqin Ha
- Department of Laboratory, Ninth Forty Hospital of the Chinese People's Liberation Army Joint Security Force, Lanzhou 730050, Gansu, China; School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, Gansu, China.
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Santos MF, Rappa G, Karbanová J, Diana P, Cirrincione G, Carbone D, Manna D, Aalam F, Wang D, Vanier C, Corbeil D, Lorico A. HIV-1-induced nuclear invaginations mediated by VAP-A, ORP3, and Rab7 complex explain infection of activated T cells. Nat Commun 2023; 14:4588. [PMID: 37563144 PMCID: PMC10415338 DOI: 10.1038/s41467-023-40227-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 07/19/2023] [Indexed: 08/12/2023] Open
Abstract
The mechanism of human immunodeficiency virus 1 (HIV-1) nuclear entry, required for productive infection, is not fully understood. Here, we report that in HeLa cells and activated CD4+ T cells infected with HIV-1 pseudotyped with VSV-G and native Env protein, respectively, Rab7+ late endosomes containing endocytosed HIV-1 promote the formation of nuclear envelope invaginations (NEIs) by a molecular mechanism involving the VOR complex, composed of the outer nuclear membrane protein VAP-A, hyperphosphorylated ORP3 and Rab7. Silencing VAP-A or ORP3 and drug-mediated impairment of Rab7 binding to ORP3-VAP-A inhibited the nuclear transfer of the HIV-1 components and productive infection. In HIV-1-resistant quiescent CD4+ T cells, ORP3 was not hyperphosphorylated and neither VOR complex nor NEIs were formed. This new cellular pathway and its molecular players are potential therapeutic targets, perhaps shared by other viruses that require nuclear entry to complete their life cycle.
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Affiliation(s)
- Mark F Santos
- Touro University Nevada College of Osteopathic Medicine, Henderson, NV, USA
| | - Germana Rappa
- Touro University Nevada College of Osteopathic Medicine, Henderson, NV, USA
| | - Jana Karbanová
- Biotechnology Center (BIOTEC) and Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Patrizia Diana
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Palermo, Italy
| | - Girolamo Cirrincione
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Palermo, Italy
| | - Daniela Carbone
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Palermo, Italy
| | - David Manna
- Touro College of Osteopathic Medicine, Middletown, New York, NY, USA
| | - Feryal Aalam
- Touro University Nevada College of Osteopathic Medicine, Henderson, NV, USA
| | - David Wang
- Touro University Nevada College of Osteopathic Medicine, Henderson, NV, USA
| | - Cheryl Vanier
- Touro University Nevada College of Osteopathic Medicine, Henderson, NV, USA
- Imgen Research, LLC, 5495 South Rainbow #201, Las Vegas, NV, USA
| | - Denis Corbeil
- Biotechnology Center (BIOTEC) and Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany.
| | - Aurelio Lorico
- Touro University Nevada College of Osteopathic Medicine, Henderson, NV, USA.
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13
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Aquino A, Bianchi N, Terrazzan A, Franzese O. Protein Kinase C at the Crossroad of Mutations, Cancer, Targeted Therapy and Immune Response. BIOLOGY 2023; 12:1047. [PMID: 37626933 PMCID: PMC10451643 DOI: 10.3390/biology12081047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/18/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023]
Abstract
The frequent PKC dysregulations observed in many tumors have made these enzymes natural targets for anticancer applications. Nevertheless, this considerable interest in the development of PKC modulators has not led to the expected therapeutic benefits, likely due to the complex biological activities regulated by PKC isoenzymes, often playing ambiguous and protective functions, further driven by the occurrence of mutations. The structure, regulation and functions of PKCs have been extensively covered in other publications. Herein, we focused on PKC alterations mostly associated with complete functional loss. We also addressed the modest yet encouraging results obtained targeting PKC in selected malignancies and the more frequent negative clinical outcomes. The reported observations advocate the need for more selective molecules and a better understanding of the involved pathways. Furthermore, we underlined the most relevant immune mechanisms controlled by PKC isoforms potentially impacting the immune checkpoint inhibitor blockade-mediated immune recovery. We believe that a comprehensive examination of the molecular features of the tumor microenvironment might improve clinical outcomes by tailoring PKC modulation. This approach can be further supported by the identification of potential response biomarkers, which may indicate patients who may benefit from the manipulation of distinctive PKC isoforms.
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Affiliation(s)
- Angelo Aquino
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy;
| | - Nicoletta Bianchi
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (N.B.); (A.T.)
| | - Anna Terrazzan
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy; (N.B.); (A.T.)
- Laboratory for Advanced Therapy Technologies (LTTA), University of Ferrara, 44121 Ferrara, Italy
| | - Ornella Franzese
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy;
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Mohan D, Sherman HL, Mitra A, Lawlor R, Shanthalingam S, Ullom J, Pobezinskaya EL, Zhang G, Osborne BA, Pobezinsky LA, Tew GN, Minter LM. LKB1 isoform expression modulates T cell plasticity downstream of PKCθ and IL-6. Mol Immunol 2023; 157:129-141. [PMID: 37018939 DOI: 10.1016/j.molimm.2023.03.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 03/12/2023] [Accepted: 03/26/2023] [Indexed: 04/05/2023]
Abstract
Following activation, CD4 T cells undergo metabolic and transcriptional changes as they respond to external cues and differentiate into T helper (Th) cells. T cells exhibit plasticity between Th phenotypes in highly inflammatory environments, such as colitis, in which high levels of IL-6 promote plasticity between regulatory T (Treg) cells and Th17 cells. Protein Kinase C theta (PKCθ) is a T cell-specific serine/threonine kinase that promotes Th17 differentiation while negatively regulating Treg differentiation. Liver kinase B1 (LKB1), also a serine/threonine kinase and encoded by Stk11, is necessary for Treg survival and function. Stk11 can be alternatively spliced to produce a short variant (Stk11S) by transcribing a cryptic exon. However, the contribution of Stk11 splice variants to Th cell differentiation has not been previously explored. Here we show that in Th17 cells, the heterogeneous ribonucleoprotein, hnRNPLL, mediates Stk11 splicing into its short splice variant, and that Stk11S expression is diminished when Hnrnpll is depleted using siRNA knock-down approaches. We further show that PKCθ regulates hnRNPLL and, thus, Stk11S expression in Th17 cells. We provide additional evidence that exposing induced (i)Tregs to IL-6 culminates in Stk11 splicing downstream of PKCθAltogether our data reveal a yet undescribed outside-in signaling pathway initiated by IL-6, that acts through PKCθ and hnRNPLL to regulate Stk11 splice variants and facilitate Th17 cell differentiation. Furthermore, we show for the first time, that this pathway can also be initiated in developing iTregs exposed to IL-6, providing mechanistic insight into iTreg phenotypic stability and iTreg to Th17 cell plasticity.
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15
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Ruminski K, Celis-Gutierrez J, Jarmuzynski N, Maturin E, Audebert S, Malissen M, Camoin L, Voisinne G, Malissen B, Roncagalli R. Mapping the SLP76 interactome in T cells lacking each of the GRB2-family adaptors reveals molecular plasticity of the TCR signaling pathway. Front Immunol 2023; 14:1139123. [PMID: 37006259 PMCID: PMC10057548 DOI: 10.3389/fimmu.2023.1139123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/02/2023] [Indexed: 03/17/2023] Open
Abstract
The propagation and diversification of signals downstream of the T cell receptor (TCR) involve several adaptor proteins that control the assembly of multimolecular signaling complexes (signalosomes). The global characterization of changes in protein-protein interactions (PPI) following genetic perturbations is critical to understand the resulting phenotypes. Here, by combining genome editing techniques in T cells and interactomics studies based on affinity purification coupled to mass spectrometry (AP-MS) analysis, we determined and quantified the molecular reorganization of the SLP76 interactome resulting from the ablation of each of the three GRB2-family adaptors. Our data showed that the absence of GADS or GRB2 induces a major remodeling of the PPI network associated with SLP76 following TCR engagement. Unexpectedly, this PPI network rewiring minimally affects proximal molecular events of the TCR signaling pathway. Nevertheless, during prolonged TCR stimulation, GRB2- and GADS-deficient cells displayed a reduced level of activation and cytokine secretion capacity. Using the canonical SLP76 signalosome, this analysis highlights the plasticity of PPI networks and their reorganization following specific genetic perturbations.
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Affiliation(s)
- Kilian Ruminski
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Javier Celis-Gutierrez
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
| | - Nicolas Jarmuzynski
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
| | - Emilie Maturin
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Stephane Audebert
- Institut Paoli-Calmettes, CRCM, Aix Marseille Université, CNRS, INSERM, Marseille Protóomique, Marseille, France
| | - Marie Malissen
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
| | - Luc Camoin
- Institut Paoli-Calmettes, CRCM, Aix Marseille Université, CNRS, INSERM, Marseille Protóomique, Marseille, France
| | - Guillaume Voisinne
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
| | - Bernard Malissen
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- Centre d’Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, Marseille, France
- *Correspondence: Romain Roncagalli, ; Bernard Malissen,
| | - Romain Roncagalli
- Centre d’Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, Marseille, France
- *Correspondence: Romain Roncagalli, ; Bernard Malissen,
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16
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Anto NP, Muraleedharan A, Nath PR, Sun Z, Keasar C, Livneh E, Braiman A, Altman A, Kong KF, Isakov N. The Peptidyl-Prolyl cis-trans isomerase, Pin1, associates with Protein Kinase C θ via a critical Phospho-Thr-Pro motif in the V3 regulatory domain. Front Immunol 2023; 14:1126464. [PMID: 36969236 PMCID: PMC10031136 DOI: 10.3389/fimmu.2023.1126464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/27/2023] [Indexed: 03/11/2023] Open
Abstract
Protein kinase C-θ (PKCθ) is a member of the novel PKC subfamily known for its selective and predominant expression in T lymphocytes where it regulates essential functions required for T cell activation and proliferation. Our previous studies provided a mechanistic explanation for the recruitment of PKCθ to the center of the immunological synapse (IS) by demonstrating that a proline-rich (PR) motif within the V3 region in the regulatory domain of PKCθ is necessary and sufficient for PKCθ IS localization and function. Herein, we highlight the importance of Thr335-Pro residue in the PR motif, the phosphorylation of which is key in the activation of PKCθ and its subsequent IS localization. We demonstrate that the phospho-Thr335-Pro motif serves as a putative binding site for the peptidyl-prolyl cis-trans isomerase (PPIase), Pin1, an enzyme that specifically recognizes peptide bonds at phospho-Ser/Thr-Pro motifs. Binding assays revealed that mutagenesis of PKCθ-Thr335-to-Ala abolished the ability of PKCθ to interact with Pin1, while Thr335 replacement by a Glu phosphomimetic, restored PKCθ binding to Pin1, suggesting that Pin1-PKCθ association is contingent upon the phosphorylation of the PKCθ-Thr335-Pro motif. Similarly, the Pin1 mutant, R17A, failed to associate with PKCθ, suggesting that the integrity of the Pin1 N-terminal WW domain is a requisite for Pin1-PKCθ interaction. In silico docking studies underpinned the role of critical residues in the Pin1-WW domain and the PKCθ phospho-Thr335-Pro motif, to form a stable interaction between Pin1 and PKCθ. Furthermore, TCR crosslinking in human Jurkat T cells and C57BL/6J mouse-derived splenic T cells promoted a rapid and transient formation of Pin1-PKCθ complexes, which followed a T cell activation-dependent temporal kinetic, suggesting a role for Pin1 in PKCθ-dependent early activation events in TCR-triggered T cells. PPIases that belong to other subfamilies, i.e., cyclophilin A or FK506-binding protein, failed to associate with PKCθ, indicating the specificity of the Pin1-PKCθ association. Fluorescent cell staining and imaging analyses demonstrated that TCR/CD3 triggering promotes the colocalization of PKCθ and Pin1 at the cell membrane. Furthermore, interaction of influenza hemagglutinin peptide (HA307-319)-specific T cells with antigen-fed antigen presenting cells (APCs) led to colocalization of PKCθ and Pin1 at the center of the IS. Together, we point to an uncovered function for the Thr335-Pro motif within the PKCθ-V3 regulatory domain to serve as a priming site for its activation upon phosphorylation and highlight its tenability to serve as a regulatory site for the Pin1 cis-trans isomerase.
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Affiliation(s)
- Nikhil Ponnoor Anto
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Amitha Muraleedharan
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Pulak Ranjan Nath
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Zuoming Sun
- Department of Immunology and Theranostics, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute of the City of Hope, Duarte, CA, United States
| | - Chen Keasar
- The Department of Computer Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Etta Livneh
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Alex Braiman
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Amnon Altman
- Division of Cell Biology, La Jolla Institute for Immunology, San Diego, CA, United States
| | - Kok-Fai Kong
- Division of Cell Biology, La Jolla Institute for Immunology, San Diego, CA, United States
| | - Noah Isakov
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
- *Correspondence: Noah Isakov,
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17
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Gao Y, Hu S, Li R, Jin S, Liu F, Liu X, Li Y, Yan Y, Liu W, Gong J, Yang S, Tu P, Shen L, Bai F, Wang Y. Hyperprogression of cutaneous T cell lymphoma after anti-PD-1 treatment. JCI Insight 2023; 8:164793. [PMID: 36649072 PMCID: PMC9977500 DOI: 10.1172/jci.insight.164793] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 01/13/2023] [Indexed: 01/18/2023] Open
Abstract
BACKGROUNDImmune checkpoint blockade is an emerging treatment for T cell non-Hodgkin's lymphoma (T-NHL), but some patients with T-NHL have experienced hyperprogression with undetermined mechanisms upon anti-PD-1 therapy.METHODSSingle-cell RNA-Seq, whole-genome sequencing, whole-exome sequencing, and functional assays were performed on primary malignant T cells from a patient with advanced cutaneous T cell lymphoma who experienced hyperprogression upon anti-PD-1 treatment.RESULTSThe patient was enrolled in a clinical trial of anti-PD-1 therapy and experienced disease hyperprogression. Single-cell RNA-Seq revealed that PD-1 blockade elicited a remarkable activation and proliferation of the CD4+ malignant T cells, which showed functional PD-1 expression and an exhausted status. Further analyses identified somatic amplification of PRKCQ in the malignant T cells. PRKCQ encodes PKCθ; PKCθ is a key player in the T cell activation/NF-κB pathway. PRKCQ amplification led to high expressions of PKCθ and p-PKCθ (T538) on the malignant T cells, resulting in an oncogenic activation of the T cell receptor (TCR) signaling pathway. PD-1 blockade in this patient released this signaling, derepressed the proliferation of malignant T cells, and resulted in disease hyperprogression.CONCLUSIONOur study provides real-world clinical evidence that PD-1 acts as a tumor suppressor for malignant T cells with oncogenic TCR activation.TRIAL REGISTRATIONClinicalTrials.gov (NCT03809767).FUNDINGThe National Natural Science Foundation of China (81922058), the National Science Fund for Distinguished Young Scholars (T2125002), the National Science and Technology Major Project (2019YFC1315702), the National Youth Top-Notch Talent Support Program (283812), and the Peking University Clinical Medicine plus X Youth Project (PKU2019LCXQ012) supported this work.
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Affiliation(s)
- Yumei Gao
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Simeng Hu
- Biomedical Pioneering Innovation Center (BIOPIC), and School of Life Sciences, Peking University, Beijing, China.,Academy for Advanced Interdisciplinary Studies (AAIS), and Peking University-Tsinghua University-National Institute of Biological Sciences Joint Graduate Program (PTN), Peking University, Beijing, China
| | - Ruoyan Li
- Biomedical Pioneering Innovation Center (BIOPIC), and School of Life Sciences, Peking University, Beijing, China.,Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Shanzhao Jin
- Biomedical Pioneering Innovation Center (BIOPIC), and School of Life Sciences, Peking University, Beijing, China.,BioMap Beijing Intelligence Technology Limited, Block C Information Center Haidian District, Beijing, China
| | - Fengjie Liu
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Xiangjun Liu
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Yingyi Li
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Yicen Yan
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Weiping Liu
- Department of Lymphoma, Key Laboratory of Carcinogenesis and Translational Research Ministry of Education, and
| | - Jifang Gong
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Shuxia Yang
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Ping Tu
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Lin Shen
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Fan Bai
- Biomedical Pioneering Innovation Center (BIOPIC), and School of Life Sciences, Peking University, Beijing, China.,Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China.,Center for Translational Cancer Research, Peking University First Hospital, Beijing, China
| | - Yang Wang
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China.,Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China.,National Clinical Research Center for Skin and Immune Diseases, Beijing, China
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18
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Koutník J, Leitges M, Siegmund K. T cell-intrinsic protein kinase D3 is dispensable for the cells' activation. Front Immunol 2022; 13:1049033. [PMID: 36466811 PMCID: PMC9713823 DOI: 10.3389/fimmu.2022.1049033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 10/24/2022] [Indexed: 07/21/2023] Open
Abstract
Protein kinases D (PKDs) are implicated in T cell receptor (TCR) signaling. Of the two T cell-expressed isoforms PKD2 and PKD3, however, only the former one is rather well understood in this immune cell type. Recently, we have observed a putative hyper-phenotype of T cells from conventional PKD3-knockout mice, which we explained as a secondary effect due to a skewed T cell compartment from naïve towards effector/memory T cells already under steady state conditions. Nonetheless, to this end it is not clear whether these aberrations are mediated by a T cell-intrinsic or -extrinsic function of PKD3. To address this question, we have investigated mice lacking PKD3 specifically in the T cell compartment. We could show that T cells from CD4-Cre-driven conditional knockout mice did not phenocopy the ones from conventional PKD3-knockout mice. In brief, no skewing in the T cell compartment of peripheral lymphoid organs, no hyper-activation upon stimulation in vitro or in vivo as well as no aberrations in follicular helper T cells (TFH) upon immunization were observed. Hence, although PKD3 is strongly regulated upon TCR stimulation, in T cells this kinase seems to be dispensable for their activation. The described skewing in the T cell compartment of conventional PKD3-deficient mice seems to be mediated by T cell-extrinsic mechanisms, thus once more emphasizing the importance of cell type-specific mouse models.
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Affiliation(s)
- Jiří Koutník
- Institute of Cell Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Michael Leitges
- Division of BioMedical Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Kerstin Siegmund
- Institute of Cell Genetics, Medical University of Innsbruck, Innsbruck, Austria
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19
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Functional implications of the CpG island methylation in the pathogenesis of celiac disease. Mol Biol Rep 2022; 49:10051-10064. [PMID: 35633417 DOI: 10.1007/s11033-022-07585-w] [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: 01/29/2022] [Accepted: 05/09/2022] [Indexed: 10/18/2022]
Abstract
Investigation of gene-environment cross talk through epigenetic modifications led to better understanding of the number of complex diseases. Clinical heterogeneity and differential treatment response often contributed by the epigenetic signatures which could be personal. DNA methylation at CpG islands presents a critical nuclear process as a result of gene-environment interactions. These CpG islands are frequently present near the promoter sequence of genes and get differentially methylated under specific environmental conditions. Technical advancements facilitate in high throughput screening of differentially methylated CpG islands. Recent epigenetic studies unraveled several CD susceptibility genes expressed in peripheral blood lymphocytes (PBLs), duodenal mucosa, lamina and epithelial cells that are influenced by differentially methylated CpG islands. Here we highlighted these susceptibility genes; classify these genes based on cellular functions and tissue of expression. We further discussed how these genes interacts with each other to influence critical pathways like NF-κB signaling pathway, IL-17 signaling cascade, RIG-I like receptor signaling pathway, NOD-like receptor pathways among several others. This review also shed light on how gut microbiota may lead to the differential methylation of CpG islands of CD susceptibility genes. Large scale epigenetic studies followed by estimation of heritability of these CpG methylation and polygenic risk score estimation of these genes would prioritize potentially druggable targets for better therapeutics. In vivo studies are warranted to unravel further cellular responses to CpG methylation.
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20
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A MLR-Based Approach to Analyze Regulators of T Lymphocyte Activation In Vivo. Int J Mol Sci 2022; 23:ijms23105337. [PMID: 35628145 PMCID: PMC9140849 DOI: 10.3390/ijms23105337] [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: 02/21/2022] [Revised: 04/29/2022] [Accepted: 05/06/2022] [Indexed: 02/04/2023] Open
Abstract
Depending on the context, robust and durable T lymphocyte activation is either desirable, as in the case of anti-tumor responses, or unwanted, in cases of autoimmunity when chronic stimulation leads to self-tissue damage. Therefore, reliable in vivo models are of great importance to identify and validate regulatory pathways of T lymphocyte activation. Here, we describe an in vivo mixed-lymphocyte-reaction (MLR) approach, which is based on the so-called parent-into-F1 (P → F1) mouse model in combination with the congenic marker CD45.1/2 and cell proliferation dye-labeling. This setup allows us to track adoptively transferred allogenic CD4+ and CD8+ T lymphocytes and analyze their phenotype as well as the proliferation by flow cytometry in the blood and spleen. We could show hypo-reactive responses of T lymphocytes isolated from knockout mice with a known defect in T lymphocyte activation. Thus, this MLR-based in vivo model provides the opportunity to analyze positive regulators of T cell responses under physiological conditions of polyclonal T lymphocyte activation in vivo.
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21
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Molecular Signature of Neuroinflammation Induced in Cytokine-Stimulated Human Cortical Spheroids. Biomedicines 2022; 10:biomedicines10051025. [PMID: 35625761 PMCID: PMC9138619 DOI: 10.3390/biomedicines10051025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 12/04/2022] Open
Abstract
Crucial in the pathogenesis of neurodegenerative diseases is the process of neuroinflammation that is often linked to the pro-inflammatory cytokines Tumor necrosis factor alpha (TNFα) and Interleukin-1beta (IL-1β). Human cortical spheroids (hCSs) constitute a valuable tool to study the molecular mechanisms underlying neurological diseases in a complex three-dimensional context. We recently designed a protocol to generate hCSs comprising all major brain cell types. Here we stimulate these hCSs for three time periods with TNFα and with IL-1β. Transcriptomic analysis reveals that the main process induced in the TNFα- as well as in the IL-1β-stimulated hCSs is neuroinflammation. Central in the neuroinflammatory response are endothelial cells, microglia and astrocytes, and dysregulated genes encoding cytokines, chemokines and their receptors, and downstream NFκB- and STAT-pathway components. Furthermore, we observe sets of neuroinflammation-related genes that are specifically modulated in the TNFα-stimulated and in the IL-1β-stimulated hCSs. Together, our results help to molecularly understand human neuroinflammation and thus a key mechanism of neurodegeneration.
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22
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Koutník J, Neururer V, Gruber T, Peer S, Hermann-Kleiter N, Olson WJ, Labi V, Leitges M, Baier G, Siegmund K. Addressing the role of PKD3 in the T cell compartment with knockout mice. Cell Commun Signal 2022; 20:54. [PMID: 35440091 PMCID: PMC9020081 DOI: 10.1186/s12964-022-00864-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/02/2022] [Indexed: 11/10/2022] Open
Abstract
Background The Protein kinase D3 (PKD3) has been implicated in signal transduction downstream of the T cell receptor (TCR). However, its role for the activation of primary T lymphocytes has not been elucidated so far. Methods Expression of PKD isoforms in primary murine T cells was determined by RT-PCR and SDS-Page. A germline PKD3-knockout mouse line was analyzed for its immune response to OVA/alum intraperitoneal immunization. Phenotyping of the T cell compartment ex vivo as well as upon stimulation in vitro was performed by flow cytometry. Additionally, cytokine expression was assessed by flow cytometry, RT-PCR and Luminex technology. Results PKD expression in T cells is modulated by TCR stimulation, leading to a rapid down-regulation on mRNA and on protein level. PKD3-deficient mice respond to immunization with enhanced T follicular helper cell generation. Furthermore, peripheral PKD3-deficient CD4+ T cells express more interleukin-2 than wild type CD4+ T cells upon TCR stimulation ex vivo. However, purified naïve CD4+ T cells do not differ in their phenotype upon differentiation in vitro from wild type T cells. Moreover, we observed a shift towards an effector/memory phenotype of splenic T cells at steady state, which might explain the contradictory results obtained with pan-T cells ex vivo and naïve-sorted T cells. Conclusion While PKD3-deficiency in vivo in mice leads to a skewing of the T cell compartment towards a more activated phenotype, this kinase seems to be dispensable for naïve CD4+ T cell differentiation in vitro. Video Abstract
Supplementary Information The online version contains supplementary material available at 10.1186/s12964-022-00864-w.
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Affiliation(s)
- Jiří Koutník
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria
| | - Verena Neururer
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria.,Apoptosis, Cancer, and Development Laboratory, Equipe labellisée 'La Ligue', LabEx DEVweCAN, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Université de Lyon, Université Claude Bernard Lyon1, 69008, Lyon, France
| | - Thomas Gruber
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria
| | - Sebastian Peer
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria
| | | | - William J Olson
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria.,Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Verena Labi
- Institute of Developmental Immunology, Medical University Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Michael Leitges
- Division of BioMedical Sciences, Faculty of Medicine, Craig L Dobbin Genetics Research Centre, Memorial University of Newfoundland Health Science Centre, 300 Prince Philip Drive, St. John's, NF, A1B 3V6, Canada
| | - Gottfried Baier
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria
| | - Kerstin Siegmund
- Institute of Cell Genetics, Medical University Innsbruck, Innsbruck, Austria.
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23
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Jiang L, Chi C, Yuan F, Lu M, Hu D, Wang L, Liu X. Anti-inflammatory effects of anemonin on acute ulcerative colitis via targeted regulation of protein kinase C-θ. Chin Med 2022; 17:39. [PMID: 35346284 PMCID: PMC8962473 DOI: 10.1186/s13020-022-00599-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/18/2022] [Indexed: 11/10/2022] Open
Abstract
Background Ulcerative colitis (UC) is an inflammatory bowel disease that causes continuous mucosal inflammation. Anemonin is a natural molecule from the Ranunculaceae and Gramineae plants that exerts anti-inflammatory properties. This study aimed to explore the effects and mechanisms of anemonin on UC. Methods C57BL/6 mice were administered dextran sulphate sodium (DSS; 3% [w/v]) to establish an animal model of UC. Mice were treated with an intraperitoneal injection of anemonin. Body weight and the disease activity index (DAI) were recorded. Haematoxylin and eosin staining, RT-qPCR, ELISA, and western blotting were performed to evaluate the histopathological changes and tissue inflammation. HT-29 cells were treated with lipopolysaccharide (LPS) and anemonin. Cell inflammation was evaluated using RT-qPCR and western blotting. The target proteins of anemonin were predicted using bioinformatics analysis and confirmed in vitro and in vivo. Results Anemonin improved DSS-induced body weight loss, shortened colon length, increased DAI, and induced pathological changes in the colon tissue of mice. Anemonin inhibited DSS-induced colon tissue inflammation as the release of IL-1β, TNF-α, and IL-6 was significantly suppressed. Additionally, anemonin attenuated LPS-induced cytokine production in HT-29 cells. PKC-θ was predicted as a target protein of anemonin. Anemonin did not affect PRKCQ gene transcription, but inhibited its translation. PRKCQ overexpression partially reversed the protective effects of anemonin on HT-29 cells. Adeno-associated virus delivery of the PRKCQ vector significantly reversed the protective effects of anemonin on the mouse colon. Conclusions Anemonin has the potential to treat UC. The anti-inflammatory effects of anemonin may be mediated through targeting PKC-θ.
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Affiliation(s)
- Lu Jiang
- Department of Gastroenterology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, No.42 Wenhua west road, Jinan, 250011, Shandong, China.
| | - Chunhua Chi
- Department of Anorectal Surgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Fang Yuan
- Department of Gastrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Meiqi Lu
- Department of Gastroenterology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, No.42 Wenhua west road, Jinan, 250011, Shandong, China
| | - Dongqing Hu
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Lin Wang
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250011, Shandong, China
| | - Xiaoming Liu
- Department of Geriatrics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, No.42 Wenhua west road, Jinan, 250011, Shandong, China.
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24
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Selective Targeting of Protein Kinase C (PKC)-θ Nuclear Translocation Reduces Mesenchymal Gene Signatures and Reinvigorates Dysfunctional CD8 + T Cells in Immunotherapy-Resistant and Metastatic Cancers. Cancers (Basel) 2022; 14:cancers14061596. [PMID: 35326747 PMCID: PMC8946217 DOI: 10.3390/cancers14061596] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/07/2022] [Accepted: 03/14/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary Some important signaling proteins that control how cells grow and behave not only act in the cytoplasm but also in the nucleus, where they tether to chromatin. This is especially true for protein kinase C (PKC)-θ, which acts in the nucleus to mediate cancer hallmarks that drive metastasis and in normal T cells. However, current PKC-θ inhibitors are either non-specific or target only its cytoplasmic function. In a bid to develop a novel class of PKC-θ inhibitor that maintains cytoplasmic signaling but inhibits its nuclear function, here we present a novel PKC-θ inhibitor (nPKC-θi2) that specifically inhibits nuclear translocation of PKC-θ without interrupting normal signaling in healthy T cells. We show for the first time that nPKC-θ mediates immunotherapy resistance via its activity in circulating tumor cells and dysfunctional CD8+ T cells. Our novel inhibitor provides a means to target this process by simultaneously overcoming T-cell exhaustion and cancer stem cell burden. As part of a sequential approach with other therapies, this work paves the way for improving outcomes in cancer patients with immunotherapy-resistant relapse and metastasis. Abstract Protein kinase C (PKC)-θ is a serine/threonine kinase with both cytoplasmic and nuclear functions. Nuclear chromatin-associated PKC-θ (nPKC-θ) is increasingly recognized to be pathogenic in cancer, whereas its cytoplasmic signaling is restricted to normal T-cell function. Here we show that nPKC-θ is enriched in circulating tumor cells (CTCs) in patients with triple-negative breast cancer (TNBC) brain metastases and immunotherapy-resistant metastatic melanoma and is associated with poor survival in immunotherapy-resistant disease. To target nPKC-θ, we designed a novel PKC-θ peptide inhibitor (nPKC-θi2) that selectively inhibits nPKC-θ nuclear translocation but not PKC-θ signaling in healthy T cells. Targeting nPKC-θ reduced mesenchymal cancer stem cell signatures in immunotherapy-resistant CTCs and TNBC xenografts. PKC-θ was also enriched in the nuclei of CD8+ T cells isolated from stage IV immunotherapy-resistant metastatic cancer patients. We show for the first time that nPKC-θ complexes with ZEB1, a key repressive transcription factor in epithelial-to-mesenchymal transition (EMT), in immunotherapy-resistant dysfunctional PD1+/CD8+ T cells. nPKC-θi2 inhibited the ZEB1/PKC-θ repressive complex to induce cytokine production in CD8+ T cells isolated from patients with immunotherapy-resistant disease. These data establish for the first time that nPKC-θ mediates immunotherapy resistance via its activity in CTCs and dysfunctional CD8+ T cells. Disrupting nPKC-θ but retaining its cytoplasmic function may offer a means to target metastases in combination with chemotherapy or immunotherapy.
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25
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Ben-Shmuel A, Sabag B, Puthenveetil A, Biber G, Levy M, Jubany T, Awwad F, Roy RK, Joseph N, Matalon O, Kivelevitz J, Barda-Saad M. Inhibition of SHP-1 activity by PKC-θ regulates NK cell activation threshold and cytotoxicity. eLife 2022; 11:73282. [PMID: 35258455 PMCID: PMC8903836 DOI: 10.7554/elife.73282] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 02/23/2022] [Indexed: 12/26/2022] Open
Abstract
Natural killer (NK) cells play a crucial role in immunity, killing virally infected and cancerous cells. The balance of signals initiated upon engagement of activating and inhibitory NK receptors with cognate ligands determines killing or tolerance. Nevertheless, the molecular mechanisms regulating rapid NK cell discrimination between healthy and malignant cells in a heterogeneous tissue environment are incompletely understood. The SHP-1 tyrosine phosphatase is the central negative NK cell regulator that dephosphorylates key activating signaling proteins. Though the mechanism by which SHP-1 mediates NK cell inhibition has been partially elucidated, the pathways by which SHP-1 is itself regulated remain unclear. Here, we show that phosphorylation of SHP-1 in NK cells on the S591 residue by PKC-θ promotes the inhibited SHP-1 ‘folded’ state. Silencing PKC-θ maintains SHP-1 in the active conformation, reduces NK cell activation and cytotoxicity, and promotes tumor progression in vivo. This study reveals a molecular pathway that sustains the NK cell activation threshold through suppression of SHP-1 activity.
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Affiliation(s)
- Aviad Ben-Shmuel
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Batel Sabag
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Abhishek Puthenveetil
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Guy Biber
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Moria Levy
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Tammir Jubany
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Fatima Awwad
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Roshan Kumar Roy
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Noah Joseph
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Omri Matalon
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Jessica Kivelevitz
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Mira Barda-Saad
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
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26
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Ramirez NGP, Lee J, Zheng Y, Li L, Dennis B, Chen D, Challa A, Planelles V, Westover KD, Alto NM, D'Orso I. ADAP1 promotes latent HIV-1 reactivation by selectively tuning KRAS-ERK-AP-1 T cell signaling-transcriptional axis. Nat Commun 2022; 13:1109. [PMID: 35232997 PMCID: PMC8888757 DOI: 10.1038/s41467-022-28772-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 02/11/2022] [Indexed: 12/29/2022] Open
Abstract
Immune stimulation fuels cell signaling-transcriptional programs inducing biological responses to eliminate virus-infected cells. Yet, retroviruses that integrate into host cell chromatin, such as HIV-1, co-opt these programs to switch between latent and reactivated states; however, the regulatory mechanisms are still unfolding. Here, we implemented a functional screen leveraging HIV-1's dependence on CD4+ T cell signaling-transcriptional programs and discovered ADAP1 is an undescribed modulator of HIV-1 proviral fate. Specifically, we report ADAP1 (ArfGAP with dual PH domain-containing protein 1), a previously thought neuronal-restricted factor, is an amplifier of select T cell signaling programs. Using complementary biochemical and cellular assays, we demonstrate ADAP1 inducibly interacts with the immune signalosome to directly stimulate KRAS GTPase activity thereby augmenting T cell signaling through targeted activation of the ERK-AP-1 axis. Single cell transcriptomics analysis revealed loss of ADAP1 function blunts gene programs upon T cell stimulation consequently dampening latent HIV-1 reactivation. Our combined experimental approach defines ADAP1 as an unexpected tuner of T cell programs facilitating HIV-1 latency escape.
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Affiliation(s)
- Nora-Guadalupe P Ramirez
- Department of Microbiology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Jeon Lee
- Lyda Hill Department of Bioinformatics, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Yue Zheng
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Lianbo Li
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Radiation Oncology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Bryce Dennis
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Radiation Oncology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Didi Chen
- Department of Microbiology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Ashwini Challa
- Department of Microbiology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Vicente Planelles
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Kenneth D Westover
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
- Department of Radiation Oncology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Neal M Alto
- Department of Microbiology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Iván D'Orso
- Department of Microbiology, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.
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27
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Li Y, Xu M, Zhang Z, Halimu G, Li Y, Li Y, Gu W, Zhang B, Wang X. In vitro study on the toxicity of nanoplastics with different charges to murine splenic lymphocytes. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127508. [PMID: 34688005 DOI: 10.1016/j.jhazmat.2021.127508] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
Nanoplastics can be ingested by organisms and penetrate biological barriers to affect multiple physiological functions. However, few studies have focused on the effects of nanoplastics on the mammalian immune system. We evaluated the effects and underlying mechanism of nanoplastics of varying particle sizes and surface charges on murine splenic lymphocytes. We found that nanoplastics penetrated into splenic lymphocytes and that nanoplastics of a diameter of 50 nm were absorbed more efficiently by the cells. The nanoplastics decreased cell viability, induce cell apoptosis, up-regulated apoptosis-related protein expression, elicited the production of reactive oxygen species, altered mitochondrial membrane potential, and impaired mitochondrial function. Positively charged nanoplastics exerted the strongest toxicity. Negatively charged and uncharged nanoplastics caused oxidative stress and mitochondrial structural damage in lymphocytes, while positively charged nanoplastics induced endogenous apoptosis directly. Moreover, nanoplastics inhibited the expression of activated T cell markers on the T cell surface, while inhibiting the differentiation of CD8+ T cells and the expression of helper T cell cytokines. In terms of the mechanism, a series of key signaling molecules in the pathways of T cell activation and function were markedly down-regulated after exposure to nanoplastics.
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Affiliation(s)
- Yuqi Li
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Mingkai Xu
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; Key Laboratory of Pollution Ecology and Environment Engineering, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China.
| | - Zhichun Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Gulinare Halimu
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Yongqiang Li
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Yansheng Li
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Wu Gu
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Bowen Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; University of Chinese Academy of Sciences, 19 YuQuan Road, Beijing 100049, PR China
| | - Xiujuan Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China; Key Laboratory of Pollution Ecology and Environment Engineering, Chinese Academy of Sciences, 72 WenHua Road, Shenyang 110016, PR China
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28
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CCCH-zinc finger antiviral protein relieves immunosuppression of T cell induced by avian leukosis virus subgroup J via NLP-PKC-δ-NFAT pathway. J Virol 2021; 96:e0134421. [PMID: 34705559 DOI: 10.1128/jvi.01344-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
CCCH-zinc finger antiviral protein (ZAP) can recognize and induce the degradation of mRNAs and proteins of certain viruses, as well as exert its antiviral activity by activating T cell. However, the mechanism of ZAP mediating T cell activation during virus infection remains unclear. Here, we found a potential function of ZAP that relieves immunosuppression of T cell induced by avian leukosis virus subgroup J (ALV-J) via a novel signaling pathway that involves norbin like protein (NLP), protein kinase C delta (PKC-δ) and nuclear factor of activated T cell (NFAT). Specifically, ZAP expression activated T cells by promoting the dephosphorylation and nuclear translocation of NFAT. Furthermore, knockdown of ZAP weakened the reactivity and antiviral response of T cells. Mechanistically, ZAP reduced PKC-δ activity by up-regulating and reactivating NLP through competitively binding with viral protein. Knockdown of NLP decreased the dephosphorylation of PKC-δ by ZAP expression. Moreover, we showed that knockdown of PKC-δ reduced the phosphorylation levels of NFAT and enhanced its nuclear translocation. Taken together, these data revealed that ZAP relieves immunosuppression caused by ALV-J and mediates T cell activation through NLP-PKC-δ-NFAT pathway. Importance The evolution of host defense system is driven synchronously in the process of resisting virus invasion. Accordingly, host innate defense factors exert effectively work in suppressing virus replication. However, it remains unclear that whether the host innate defense factors are involved in antiviral immune response against the invasion of immunosuppressive viruses. Here, we found that CCCH-type zinc finger antiviral protein (ZAP) effectively worked in resistance on immunosuppression caused by avian leukosis virus subgroup J (ALV-J), a classic immunosuppressive virus. Evidence showed that ZAP released the phosphatase activity of NLP inhibited by ALV-J and further activated NFAT by inactivating PKC-δ. This novel molecular mechanism that ZAP regulates antiviral immune response by mediating NLP-PKC-δ-NFAT pathway has greatly enriched the understanding of the functions of host innate defense factors and provided important scientific ideas and theoretical basis for the research of immunosuppressive virus and antiviral immunity.
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29
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Lu C, Klement JD, Smith AD, Yang D, Waller JL, Browning DD, Munn DH, Liu K. p50 suppresses cytotoxic T lymphocyte effector function to regulate tumor immune escape and response to immunotherapy. J Immunother Cancer 2021; 8:jitc-2020-001365. [PMID: 33051343 PMCID: PMC7555101 DOI: 10.1136/jitc-2020-001365] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
Background NF-κB is a key link between inflammation and cancer. Previous studies of NF-κB have largely focused on tumor cells, and the intrinsic function of NF-κB in T cells in tumor development and response to immunotherapy is largely unknown. We aimed at testing the hypothesis that NF-κB1 (p50) activation in T cells underlies human colon cancer immune escape and human cancer non-response to anti-PD-1 immunotherapy. Methods We screened NF-κB activation in human colon carcinoma and used mouse models to determine p50 function in tumor cells and immune cells. RNA-Seq was used to identify p50 target genes. p50 binding to target gene promoters were determined by electrophoresis mobility shift assay and chromatin immunoprecipitation. A p50 activation score was generated from gene expression profiling and used to link p50 activation to T-cell activation and function pre-nivolumab and post-nivolumab immunotherapy in human patients with cancer. Results p50 is the dominant form of NF-κB that is highly activated in immune cells in the human colorectal carcinoma microenvironment and neighboring non-neoplastic colon epithelial cells. Tumor cell intrinsic p50 signaling and T-cell intrinsic p50 signaling exert opposing functions in tumor growth control in vivo. Deleting Nfkb1 in tumor cells increased whereas in T cells decreased tumor growth in preclinical mouse models. Gene expression profiling identified Gzmb as a p50 target in T cells. p50 binds directly to a previously uncharacterized κB sequence at the Gzmb promoter in T cells, resulting in repression of Gzmb expression in tumor-infiltrating cytotoxic T lymphocytes (CTLs) to induce a dysfunctional CTL phenotype to promote tumor immune escape. p50 activation is inversely correlated with both GZMB expression and T-cell tumor infiltration in human colorectal carcinoma. Furthermore, nivolumab immunotherapy decreased p50 activation and increased GZMB expression in human patients with melanoma. Conclusions Inflammation activates p50 that binds to the Gzmb promoter to repress granzyme B expression in T cells, resulting in CTL dysfunction to confer tumor immune escape and decreased response to anti-PD-1 immunotherapy.
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Affiliation(s)
- Chunwan Lu
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, Georgia, United States .,Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,Charlie Norwood VA Medical Center, Augusta, Georgia, United States
| | - John D Klement
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, Georgia, United States.,Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,Charlie Norwood VA Medical Center, Augusta, Georgia, United States
| | - Alyssa D Smith
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, Georgia, United States.,Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,Charlie Norwood VA Medical Center, Augusta, Georgia, United States
| | - Dafeng Yang
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, Georgia, United States.,Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,Charlie Norwood VA Medical Center, Augusta, Georgia, United States
| | - Jennifer L Waller
- Department of Population Health Sciences, Augusta University, Augusta, Georgia, United States
| | - Darren D Browning
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, Georgia, United States.,Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - David H Munn
- Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Kebin Liu
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, Georgia, United States .,Georgia Cancer Center, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,Charlie Norwood VA Medical Center, Augusta, Georgia, United States
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30
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Mbonye U, Leskov K, Shukla M, Valadkhan S, Karn J. Biogenesis of P-TEFb in CD4+ T cells to reverse HIV latency is mediated by protein kinase C (PKC)-independent signaling pathways. PLoS Pathog 2021; 17:e1009581. [PMID: 34529720 PMCID: PMC8478230 DOI: 10.1371/journal.ppat.1009581] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 09/28/2021] [Accepted: 09/04/2021] [Indexed: 01/09/2023] Open
Abstract
The switch between HIV latency and productive transcription is regulated by an auto-feedback mechanism initiated by the viral trans-activator Tat, which functions to recruit the host transcription elongation factor P-TEFb to proviral HIV. A heterodimeric complex of CDK9 and one of three cyclin T subunits, P-TEFb is expressed at vanishingly low levels in resting memory CD4+ T cells and cellular mechanisms controlling its availability are central to regulation of the emergence of HIV from latency. Using a well-characterized primary T-cell model of HIV latency alongside healthy donor memory CD4+ T cells, we characterized specific T-cell receptor (TCR) signaling pathways that regulate the generation of transcriptionally active P-TEFb, defined as the coordinate expression of cyclin T1 and phospho-Ser175 CDK9. Protein kinase C (PKC) agonists, such as ingenol and prostratin, stimulated active P-TEFb expression and reactivated latent HIV with minimal cytotoxicity, even in the absence of intracellular calcium mobilization with an ionophore. Unexpectedly, inhibition-based experiments demonstrated that PKC agonists and TCR-mobilized diacylglycerol signal through MAP kinases ERK1/2 rather than through PKC to effect the reactivation of both P-TEFb and latent HIV. Single-cell and bulk RNA-seq analyses revealed that of the four known isoforms of the Ras guanine nucleotide exchange factor RasGRP, RasGRP1 is by far the predominantly expressed diacylglycerol-dependent isoform in CD4+ T cells. RasGRP1 should therefore mediate the activation of ERK1/2 via Ras-Raf signaling upon TCR co-stimulation or PKC agonist challenge. Combined inhibition of the PI3K-mTORC2-AKT-mTORC1 pathway and the ERK1/2 activator MEK prior to TCR co-stimulation abrogated active P-TEFb expression and substantially suppressed latent HIV reactivation. Therefore, contrary to prevailing models, the coordinate reactivation of P-TEFb and latent HIV in primary T cells following either TCR co-stimulation or PKC agonist challenge is independent of PKC but rather involves two complementary signaling arms of the TCR cascade, namely, RasGRP1-Ras-Raf-MEK-ERK1/2 and PI3K-mTORC2-AKT-mTORC1.
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Affiliation(s)
- Uri Mbonye
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
- * E-mail: (UM); (JK)
| | - Konstantin Leskov
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Meenakshi Shukla
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Saba Valadkhan
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
| | - Jonathan Karn
- Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, Ohio, United States of America
- * E-mail: (UM); (JK)
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Papa P, Whitefield B, Mortensen DS, Cashion D, Huang D, Torres E, Parnes J, Sapienza J, Hansen J, Correa M, Delgado M, Harris R, Hegde S, Norris S, Bahmanyar S, Plantevin-Krenitsky V, Liu Z, Leftheris K, Kulkarni A, Bennett B, Hur EM, Ringheim G, Khambatta G, Chan H, Muir J, Blease K, Burnett K, LeBrun L, Morrison L, Celeridad M, Khattri R, Cathers BE. Discovery of the Selective Protein Kinase C-θ Kinase Inhibitor, CC-90005. J Med Chem 2021; 64:11886-11903. [PMID: 34355886 DOI: 10.1021/acs.jmedchem.1c00388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The PKC-θ isoform of protein kinase C is selectively expressed in T lymphocytes and plays an important role in the T cell antigen receptor (TCR)-triggered activation of mature T cells, T cell proliferation, and the subsequent release of cytokines such as interleukin-2 (IL-2). Herein, we report the synthesis and structure-activity relationship (SAR) of a novel series of PKC-θ inhibitors. Through a combination of structure-guided design and exploratory SAR, suitable replacements for the basic C4 amine of the original lead (3) were identified. Property-guided design enabled the identification of appropriately substituted C2 groups to afford potent analogs with metabolic stability and permeability to support in vivo testing. With exquisite general kinase selectivity, cellular inhibition of T cell activation as assessed by IL-2 expression, a favorable safety profile, and demonstrated in vivo efficacy in models of acute and chronic T cell activation with oral dosing, CC-90005 (57) was selected for clinical development.
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Affiliation(s)
- Patrick Papa
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Brandon Whitefield
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Deborah S Mortensen
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Dan Cashion
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Dehua Huang
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Eduardo Torres
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Jason Parnes
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - John Sapienza
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Joshua Hansen
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Matthew Correa
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Mercedes Delgado
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Roy Harris
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Sayee Hegde
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Stephen Norris
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Sogole Bahmanyar
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | | | - Zheng Liu
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Katerina Leftheris
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Ashutosh Kulkarni
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Brydon Bennett
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Eun Mi Hur
- Bristol Myers Squibb, 86 Morris Avenue, Summit, New Jersey 07901, United States
| | - Garth Ringheim
- Bristol Myers Squibb, 86 Morris Avenue, Summit, New Jersey 07901, United States
| | - Godrej Khambatta
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Henry Chan
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Jeffrey Muir
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Kate Blease
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Kelven Burnett
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Laurie LeBrun
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Lisa Morrison
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Maria Celeridad
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Roli Khattri
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Brian E Cathers
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
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32
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Wu B, Woo JS, Vila P, Jew M, Leung J, Sun Z, Srikanth S, Gwack Y. NKD2 mediates stimulation-dependent ORAI1 trafficking to augment Ca 2+ entry in T cells. Cell Rep 2021; 36:109603. [PMID: 34433025 PMCID: PMC8435239 DOI: 10.1016/j.celrep.2021.109603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 06/21/2021] [Accepted: 08/03/2021] [Indexed: 01/19/2023] Open
Abstract
Sustained activation of the Ca2+-release-activated Ca2+ (CRAC) channel is pivotal for effector T cell responses. The mechanisms underlying this sustainability remain poorly understood. We find that plasma membrane localization of ORAI1, the pore subunit of CRAC channels, is limited in effector T cells, with a significant fraction trapped in intracellular vesicles. From a targeted screen, we identify an essential component of ORAI1+ vesicles, naked cuticle homolog 2 (NKD2). Mechanistically, NKD2, an adaptor molecule activated by signaling pathways downstream of T cell receptors, orchestrates trafficking and insertion of ORAI1+ vesicles to the plasma membrane. Together, our findings suggest that T cell receptor (TCR)-stimulation-dependent insertion of ORAI1 into the plasma membrane is essential for sustained Ca2+ signaling and cytokine production in T cells.
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Affiliation(s)
- Beibei Wu
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA
| | - Jin Seok Woo
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA
| | - Pamela Vila
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA,Present address: Olive View-UCLA Medical Center, 14445 Olive View Drive, Sylmar, CA 91342, USA
| | - Marcus Jew
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA,Present address: Ronald Reagan UCLA Medical Center, 757 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Jennifer Leung
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA,Present address: Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Zuoming Sun
- Department of Molecular Imaging & Therapy, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA
| | - Sonal Srikanth
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA.
| | - Yousang Gwack
- Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA.
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Wang Y, Gao N, Feng Y, Cai M, Li Y, Xu X, Zhang H, Yao D. Protein kinase C theta (Prkcq) affects nerve degeneration and regeneration through the c-fos and c-jun pathways in injured rat sciatic nerves. Exp Neurol 2021; 346:113843. [PMID: 34418453 DOI: 10.1016/j.expneurol.2021.113843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 07/23/2021] [Accepted: 08/15/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND Previous finding using DNA microarray and bioinformatics analysis, we have reported some key factors which regulated gene expression and signaling pathways in injured sciatic nerve during Wallerian Degeneration (WD). This research is focused on protein kinase C theta (Prkcq) participates in the regulation of the WD process. METHODS In this study, we explored the molecular mechanism by which Prkcq in Schwann cells (SCs) affects nerve degeneration and regeneration in vivo and in vitro after rat sciatic nerve injury. RESULTS Study of the cross-sectional model showed that Prkcq expression decreased significantly during sciatic nerve repair. Functional analysis showed that upregulation and downregulation of Prkcq could affect the proliferation, migration and apoptosis of Schwann cells and lead to the expression of related factors through the activation of the β-catenin, c-fos, and p-c-jun/c-jun pathways. CONCLUSION The study provides insights into the role of Prkcq in early WD during peripheral nerve degeneration and/or regeneration.
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Affiliation(s)
- Yi Wang
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226019, PR China
| | - Nannan Gao
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226019, PR China
| | - Yumei Feng
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226019, PR China
| | - Min Cai
- Medical School of Nantong University, Nantong, Jiangsu 226001, PR China.
| | - Yuting Li
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226019, PR China
| | - Xi Xu
- Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, PR China
| | - Huanhuan Zhang
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226019, PR China
| | - Dengbing Yao
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu 226019, PR China.
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34
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Dhar P, Basher F, Ji Z, Huang L, Qin S, Wainwright DA, Robinson J, Hagler S, Zhou J, MacKay S, Wu JD. Tumor-derived NKG2D ligand sMIC reprograms NK cells to an inflammatory phenotype through CBM signalosome activation. Commun Biol 2021; 4:905. [PMID: 34294876 PMCID: PMC8298432 DOI: 10.1038/s42003-021-02440-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 07/05/2021] [Indexed: 12/31/2022] Open
Abstract
Natural Killer (NK) cell dysfunction is associated with poorer clinical outcome in cancer patients. What regulates NK cell dysfunction in tumor microenvironment is not well understood. Here, we demonstrate that the human tumor-derived NKG2D ligand soluble MIC (sMIC) reprograms NK cell to secrete pro-tumorigenic cytokines with diminished cytotoxicity and polyfunctional potential. Antibody clearing sMIC restores NK cell to a normal cytotoxic effector functional state. We discovered that sMIC selectively activates the CBM-signalosome inflammatory pathways in NK cells. Conversely, tumor cell membrane-bound MIC (mMIC) stimulates NK cell cytotoxicity through activating PLC2γ2/SLP-76/Vav1 pathway. Ultimately, antibody targeting sMIC effectuated the in vivo anti-tumor effect of adoptively transferred NK cells. Our findings uncover an unrecognized mechanism that could instruct NK cell to a dysfunctional state in response to cues in the tumor microenvironment. Our findings provide a rationale for co-targeting sMIC to enhance the efficacy of the ongoing NK cell-based cancer immunotherapy.
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Affiliation(s)
- Payal Dhar
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Fahmin Basher
- Division of General Internal Medicine, Department of Medicine, University of Miami, Miami, FL, USA
| | - Zhe Ji
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Lei Huang
- Center for Research Informatics, The University of Chicago, Chicago, IL, USA
| | - Si Qin
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Derek A Wainwright
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | | | | | - Jing Zhou
- Isoplexis Corporation, Branford, CT, USA
| | | | - Jennifer D Wu
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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35
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He Y, Yang Z, Zhao CS, Xiao Z, Gong Y, Li YY, Chen Y, Du Y, Feng D, Altman A, Li Y. T-cell receptor (TCR) signaling promotes the assembly of RanBP2/RanGAP1-SUMO1/Ubc9 nuclear pore subcomplex via PKC-θ-mediated phosphorylation of RanGAP1. eLife 2021; 10:67123. [PMID: 34110283 PMCID: PMC8225385 DOI: 10.7554/elife.67123] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/03/2021] [Indexed: 01/15/2023] Open
Abstract
The nuclear pore complex (NPC) is the sole and selective gateway for nuclear transport, and its dysfunction has been associated with many diseases. The metazoan NPC subcomplex RanBP2, which consists of RanBP2 (Nup358), RanGAP1-SUMO1, and Ubc9, regulates the assembly and function of the NPC. The roles of immune signaling in regulation of NPC remain poorly understood. Here, we show that in human and murine T cells, following T-cell receptor (TCR) stimulation, protein kinase C-θ (PKC-θ) directly phosphorylates RanGAP1 to facilitate RanBP2 subcomplex assembly and nuclear import and, thus, the nuclear translocation of AP-1 transcription factor. Mechanistically, TCR stimulation induces the translocation of activated PKC-θ to the NPC, where it interacts with and phosphorylates RanGAP1 on Ser504 and Ser506. RanGAP1 phosphorylation increases its binding affinity for Ubc9, thereby promoting sumoylation of RanGAP1 and, finally, assembly of the RanBP2 subcomplex. Our findings reveal an unexpected role of PKC-θ as a direct regulator of nuclear import and uncover a phosphorylation-dependent sumoylation of RanGAP1, delineating a novel link between TCR signaling and assembly of the RanBP2 NPC subcomplex.
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Affiliation(s)
- Yujiao He
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhiguo Yang
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Chen-Si Zhao
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Zhihui Xiao
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yu Gong
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yun-Yi Li
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yiqi Chen
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yunting Du
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Dianying Feng
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Amnon Altman
- Center for Cancer Immunotherapy, La Jolla Institute for Immunology, La Jolla, United States
| | - Yingqiu Li
- MOE Key Laboratory of Gene Function and Regulation, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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36
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Ngoenkam J, Paensuwan P, Wipa P, Schamel WWA, Pongcharoen S. Wiskott-Aldrich Syndrome Protein: Roles in Signal Transduction in T Cells. Front Cell Dev Biol 2021; 9:674572. [PMID: 34169073 PMCID: PMC8217661 DOI: 10.3389/fcell.2021.674572] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/17/2021] [Indexed: 11/23/2022] Open
Abstract
Signal transduction regulates the proper function of T cells in an immune response. Upon binding to its specific ligand associated with major histocompatibility complex (MHC) molecules on an antigen presenting cell, the T cell receptor (TCR) initiates intracellular signaling that leads to extensive actin polymerization. Wiskott-Aldrich syndrome protein (WASp) is one of the actin nucleation factors that is recruited to TCR microclusters, where it is activated and regulates actin network formation. Here we highlight the research that has focused on WASp-deficient T cells from both human and mice in TCR-mediated signal transduction. We discuss the role of WASp in proximal TCR signaling as well as in the Ras/Rac-MAPK (mitogen-activated protein kinase), PKC (protein kinase C) and Ca2+-mediated signaling pathways.
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Affiliation(s)
- Jatuporn Ngoenkam
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Pussadee Paensuwan
- Department of Optometry, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, Thailand
| | - Piyamaporn Wipa
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Wolfgang W. A. Schamel
- Signalling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
- Department of Immunology, Faculty of Biology, University of Freiburg, Freiburg, Germany
- Centre for Chronic Immunodeficiency (CCI), Freiburg University Clinics, University of Freiburg, Freiburg, Germany
| | - Sutatip Pongcharoen
- Department of Medicine, Faculty of Medicine, Naresuan University, Phitsanulok, Thailand
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37
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Oh H, Zhao J, Grinberg-Bleyer Y, Postler TS, Wang P, Park SG, Rabadan R, Hayden MS, Ghosh S. PDK1 Is Required for Maintenance of CD4 + Foxp3 + Regulatory T Cell Function. THE JOURNAL OF IMMUNOLOGY 2021; 206:1776-1783. [PMID: 33789982 DOI: 10.4049/jimmunol.2000051] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 02/10/2021] [Indexed: 01/22/2023]
Abstract
Regulatory T (Treg) cells have an essential role in maintaining immune homeostasis, in part by suppressing effector T cell functions. Phosphoinositide-dependent kinase 1 (PDK1) is a pleiotropic kinase that acts as a key effector downstream of PI3K in many cell types. In T cells, PDK1 has been shown to be critical for activation of NF-κB and AKT signaling upon TCR ligation and is therefore essential for effector T cell activation, proliferation, and cytokine production. Using Treg cell-specific conditional deletion, we now demonstrate that PDK1 is also essential for Treg cell suppressive activity in vivo. Ablation of Pdk1 specifically in Treg cells led to systemic, lethal, scurfy-like inflammation in mice. Genome-wide analysis confirmed that PDK1 is essential for the regulation of key Treg cell signature gene expression and, further, suggested that PDK1 acts primarily to control Treg cell gene expression through regulation of the canonical NF-κB pathway. Consistent with these results, the scurfy-like phenotype of mice lacking PDK1 in Treg cells was rescued by enforced activation of NF-κB downstream of PDK1. Therefore, PDK1-mediated activation of the NF-κB signaling pathway is essential for regulation of Treg cell signature gene expression and suppressor function.
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Affiliation(s)
- Hyunju Oh
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
| | - Jingyao Zhao
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
| | - Yenkel Grinberg-Bleyer
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
| | - Thomas S Postler
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
| | - Pingzhang Wang
- Department of Systems Biology and Department of Biomedical Informatics, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032; and
| | - Sung-Gyoo Park
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
| | - Raul Rabadan
- Department of Systems Biology and Department of Biomedical Informatics, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032; and
| | - Matthew S Hayden
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032.,Section of Dermatology, Department of Surgery, Dartmouth-Hitchcock Medical Center and Geisel School of Medicine, Lebanon, NH 03756
| | - Sankar Ghosh
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032;
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38
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Wei X, Li C, Zhang Y, Li K, Li J, Ai K, Li K, Zhang J, Yang J. Fish NF‐κB couples TCR and IL‐17 signals to regulate ancestral T‐cell immune response against bacterial infection. FASEB J 2021; 35:e21457. [DOI: 10.1096/fj.202002393rr] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/02/2021] [Accepted: 02/02/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Xiumei Wei
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Cheng Li
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Yu Zhang
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Kang Li
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Jiaqi Li
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Kete Ai
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Kunming Li
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Jiansong Zhang
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
| | - Jialong Yang
- State Key Laboratory of Estuarine and Coastal Research School of Life Sciences East China Normal University Shanghai China
- Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology Qingdao China
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39
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Nishizawa D, Iseki M, Arita H, Hanaoka K, Yajima C, Kato J, Ogawa S, Hiranuma A, Kasai S, Hasegawa J, Hayashida M, Ikeda K. Genome-wide association study identifies candidate loci associated with chronic pain and postherpetic neuralgia. Mol Pain 2021; 17:1744806921999924. [PMID: 33685280 PMCID: PMC8822450 DOI: 10.1177/1744806921999924] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Human twin studies and other studies have indicated that chronic pain has heritability that ranges from 30% to 70%. We aimed to identify potential genetic variants that contribute to the susceptibility to chronic pain and efficacy of administered drugs. We conducted genome-wide association studies (GWASs) using whole-genome genotyping arrays with more than 700,000 markers in 191 chronic pain patients and a subgroup of 89 patients with postherpetic neuralgia (PHN) in addition to 282 healthy control subjects in several genetic models, followed by additional gene-based and gene-set analyses of the same phenotypes. We also performed a GWAS for the efficacy of drugs for the treatment of pain. RESULTS Although none of the single-nucleotide polymorphisms (SNPs) were found to be genome-wide significantly associated with chronic pain (p ≥ 1.858 × 10-7), the GWAS of PHN patients revealed that the rs4773840 SNP within the ABCC4 gene region was significantly associated with PHN in the trend model (nominal p = 1.638 × 10-7). In the additional gene-based analysis, one gene, PRKCQ, was significantly associated with chronic pain in the trend model (adjusted p = 0.03722). In the gene-set analysis, several gene sets were significantly associated with chronic pain and PHN. No SNPs were significantly associated with the efficacy of any of types of drugs in any of the genetic models. CONCLUSIONS These results suggest that the PRKCQ gene and rs4773840 SNP within the ABCC4 gene region may be related to the susceptibility to chronic pain conditions and PHN, respectively.
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Affiliation(s)
- Daisuke Nishizawa
- Addictive Substance Project, Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Masako Iseki
- Department of Anesthesiology & Pain Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Hideko Arita
- Department of Anesthesiology and Pain Relief Center, JR Tokyo General Hospital, Tokyo, Japan
| | - Kazuo Hanaoka
- Department of Anesthesiology and Pain Relief Center, JR Tokyo General Hospital, Tokyo, Japan
| | - Choku Yajima
- Department of Anesthesiology and Pain Relief Center, JR Tokyo General Hospital, Tokyo, Japan
| | - Jitsu Kato
- Department of Anesthesiology, Nihon University School of Medicine, Tokyo, Japan
| | - Setsuro Ogawa
- Nihon University, University Research Center, Tokyo, Japan
| | - Ayako Hiranuma
- Addictive Substance Project, Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Department of Surgery, Toho University Sakura Medical Center, Sakura, Japan
| | - Shinya Kasai
- Addictive Substance Project, Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Junko Hasegawa
- Addictive Substance Project, Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Masakazu Hayashida
- Addictive Substance Project, Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Department of Anesthesiology & Pain Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazutaka Ikeda
- Addictive Substance Project, Department of Psychiatry and Behavioral Sciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
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Nicolle A, Zhang Y, Belguise K. The Emerging Function of PKCtheta in Cancer. Biomolecules 2021; 11:biom11020221. [PMID: 33562506 PMCID: PMC7915540 DOI: 10.3390/biom11020221] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/22/2021] [Accepted: 02/02/2021] [Indexed: 12/30/2022] Open
Abstract
Protein Kinase C theta (PKCθ) is a serine/threonine kinase that belongs to the novel PKC subfamily. In normal tissue, its expression is restricted to skeletal muscle cells, platelets and T lymphocytes in which PKCθ controls several essential cellular processes such as survival, proliferation and differentiation. Particularly, PKCθ has been extensively studied for its role in the immune system where its translocation to the immunological synapse plays a critical role in T cell activation. Beyond its physiological role in immune responses, increasing evidence implicates PKCθ in the pathology of various diseases, especially autoimmune disorders and cancers. In this review, we discuss the implication of PKCθ in various types of cancers and the PKCθ-mediated signaling events controlling cancer initiation and progression. In these types of cancers, the high PKCθ expression leads to aberrant cell proliferation, migration and invasion resulting in malignant phenotype. The recent development and application of PKCθ inhibitors in the context of autoimmune diseases could benefit the emergence of treatment for cancers in which PKCθ has been implicated.
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Role of Protein Kinase C in Immune Cell Activation and Its Implication Chemical-Induced Immunotoxicity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1275:151-163. [PMID: 33539015 DOI: 10.1007/978-3-030-49844-3_6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Protein kinase C (PKCs) isoforms play a key regulatory role in a variety of cellular functions, including cell growth and differentiation, gene expression, hormone secretion, etc. Patterns of expression for each PKC isoform differ among tissues, and it is also clear that different PKCs are often not functionally redundant, for example specific PKCs mediate specific cellular signals required for activation, proliferation, differentiation and survival of immune cells. In the last 20 years, we have been studying the role of PKCs, mainly PKCβ and its anchoring protein RACK1 (Receptor for Activated C Kinase 1), in immune cell activation, and their implication in immunosenescence and immunotoxicity. We could demonstrate that PKCβ and RACK1 are central in dendritic cell maturation and activation by chemical allergens, and their expressions can be targeted by EDCs and anti-inflammatory drugs. In this chapter, current knowledge on the role of PKC in immune cell activation and possible implication in immunotoxicity will be described.
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Hu Z, Li L, Zhu B, Huang Y, Wang X, Lin X, Li M, Xu P, Zhang X, Zhang J, Hua Z. Annexin A5 is essential for PKCθ translocation during T-cell activation. J Biol Chem 2020; 295:14214-14221. [PMID: 32796034 DOI: 10.1074/jbc.ra120.015143] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/09/2020] [Indexed: 12/12/2022] Open
Abstract
T-cell activation is a critical part of the adaptive immune system, enabling responses to foreign cells and external stimulus. In this process, T-cell antigen receptor (TCR) activation stimulates translocation of the downstream kinase PKCθ to the membrane, leading to NF-κB activation and thus transcription of relevant genes. However, the details of how PKCθ is recruited to the membrane remain enigmatic. It is known that annexin A5 (ANXA5), a calcium-dependent membrane-binding protein, has been reported to mediate PKCδ activation by interaction with PKCδ, a homologue of PKCθ, which implicates a potential role of ANXA5 involved in PKCθ signaling. Here we demonstrate that ANXA5 does play a critical role in the recruitment of PKCθ to the membrane during T-cell activation. ANXA5 knockout in Jurkat T cells substantially inhibited the membrane translocation of PKCθ upon TCR engagement and blocked the recruitment of CARMA1-BCL10-MALT1 signalosome, which provides a platform for the catalytic activation of IKKs and subsequent activation of canonical NF-κB signaling in activated T cells. As a result, NF-κB activation was impaired in ANXA5-KO T cells. T-cell activation was also suppressed by ANAX5 knockdown in primary T cells. These results demonstrated a novel role of ANXA5 in PKC translocation and PKC signaling during T-cell activation.
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Affiliation(s)
- Zhaoqing Hu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Lin Li
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Banghui Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Yi Huang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Xinran Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Xiaolei Lin
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Maoxia Li
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Peipei Xu
- Department of Hematology, Drum Tower Hospital, School of Medicine, Nanjing University, Nanjing, China
| | - Xuerui Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China .,Changzhou High-Tech Research Institute of Nanjing University and Jiangsu Target Pharma Laboratories Inc., Changzhou, China
| | - Jing Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Zichun Hua
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China .,Changzhou High-Tech Research Institute of Nanjing University and Jiangsu Target Pharma Laboratories Inc., Changzhou, China.,Shenzhen Research Institute of Nanjing University, Shenzhen, China
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Yu H, Lin L, Zhang Z, Zhang H, Hu H. Targeting NF-κB pathway for the therapy of diseases: mechanism and clinical study. Signal Transduct Target Ther 2020; 5:209. [PMID: 32958760 PMCID: PMC7506548 DOI: 10.1038/s41392-020-00312-6] [Citation(s) in RCA: 824] [Impact Index Per Article: 206.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 08/25/2020] [Accepted: 08/31/2020] [Indexed: 02/05/2023] Open
Abstract
NF-κB pathway consists of canonical and non-canonical pathways. The canonical NF-κB is activated by various stimuli, transducing a quick but transient transcriptional activity, to regulate the expression of various proinflammatory genes and also serve as the critical mediator for inflammatory response. Meanwhile, the activation of the non-canonical NF-κB pathway occurs through a handful of TNF receptor superfamily members. Since the activation of this pathway involves protein synthesis, the kinetics of non-canonical NF-κB activation is slow but persistent, in concordance with its biological functions in the development of immune cell and lymphoid organ, immune homeostasis and immune response. The activation of the canonical and non-canonical NF-κB pathway is tightly controlled, highlighting the vital roles of ubiquitination in these pathways. Emerging studies indicate that dysregulated NF-κB activity causes inflammation-related diseases as well as cancers, and NF-κB has been long proposed as the potential target for therapy of diseases. This review attempts to summarize our current knowledge and updates on the mechanisms of NF-κB pathway regulation and the potential therapeutic application of inhibition of NF-κB signaling in cancer and inflammatory diseases.
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Affiliation(s)
- Hui Yu
- Department of Rheumatology and Immunology, National Clinical Research Center for Geriatrics, State Key Laboratory of Biotherapy, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Liangbin Lin
- Department of Rheumatology and Immunology, National Clinical Research Center for Geriatrics, State Key Laboratory of Biotherapy, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Zhiqiang Zhang
- Immunobiology and Transplant Science Center, Houston Methodist Hospital, Houston, TX, 77030, USA
| | - Huiyuan Zhang
- Department of Rheumatology and Immunology, National Clinical Research Center for Geriatrics, State Key Laboratory of Biotherapy, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China.
| | - Hongbo Hu
- Department of Rheumatology and Immunology, National Clinical Research Center for Geriatrics, State Key Laboratory of Biotherapy, West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, China.
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Xie D, Zhang S, Chen P, Deng W, Pan Y, Xie J, Wang J, Liao B, Sleasman JW, Zhong XP. Negative control of diacylglycerol kinase ζ-mediated inhibition of T cell receptor signaling by nuclear sequestration in mice. Eur J Immunol 2020; 50:1729-1745. [PMID: 32525220 DOI: 10.1002/eji.201948442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 04/17/2020] [Accepted: 06/09/2020] [Indexed: 12/16/2022]
Abstract
Diacylglycerol kinases (DGKs) play important roles in restraining diacylglycerol (DAG)-mediated signaling. Within the DGK family, the ζ isoform appears to be the most important isoform in T cells for controlling their development and function. DGKζ has been demonstrated to regulate T cell maturation, activation, anergy, effector/memory differentiation, defense against microbial infection, and antitumor immunity. Given its critical functions, DGKζ function should be tightly regulated to ensure proper signal transduction; however, mechanisms that control DGKζ function are still poorly understood. We report here that DGKζ dynamically translocates from the cytosol into the nuclei in T cells after TCR stimulation. In mice, DGKζ mutant defective in nuclear localization displayed enhanced ability to inhibit TCR-induced DAG-mediated signaling in primary T cells, maturation of conventional αβT and iNKT cells, and activation of peripheral T cells compared with WT DGKζ. Our study reveals for the first time nuclear sequestration of DGKζ as a negative control mechanism to spatially restrain it from terminating DAG mediated signaling in T cells. Our data suggest that manipulation of DGKζ nucleus-cytosol shuttling as a novel strategy to modulate DGKζ activity and immune responses for treatment of autoimmune diseases and cancer.
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Affiliation(s)
- Danli Xie
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Shimeng Zhang
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Pengcheng Chen
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Wenhai Deng
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Yun Pan
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Jinhai Xie
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Jinli Wang
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Bryce Liao
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - John W Sleasman
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina
| | - Xiao-Ping Zhong
- Division of Allergy and Immunology, Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, North Carolina.,Department of Immunology, Duke University Medical Center, Durham, North Carolina.,Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
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Byerly JH, Port ER, Irie HY. PRKCQ inhibition enhances chemosensitivity of triple-negative breast cancer by regulating Bim. Breast Cancer Res 2020; 22:72. [PMID: 32600444 PMCID: PMC7322866 DOI: 10.1186/s13058-020-01302-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 05/26/2020] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Protein kinase C theta, (PRKCQ/PKCθ) is a serine/threonine kinase that is highly expressed in a subset of triple-negative breast cancers (TNBC) and promotes their growth, anoikis resistance, epithelial-mesenchymal transition (EMT), and invasion. Here, we show that PRKCQ regulates the sensitivity of TNBC cells to apoptosis triggered by standard-of-care chemotherapy by regulating levels of pro-apoptotic Bim. METHODS To determine the effects of PRKCQ expression on chemotherapy-induced apoptosis, shRNA and cDNA vectors were used to modulate the PRKCQ expression in MCF-10A breast epithelial cells or triple-negative breast cancer cells (MDA-MB231Luc, HCC1806). A novel PRKCQ small-molecule inhibitor, 17k, was used to inhibit kinase activity. Viability and apoptosis of cells treated with PRKCQ cDNA/shRNA/inhibitor +/-chemotherapy were measured. Expression levels of Bcl2 family members were assessed. RESULTS Enhanced expression of PRKCQ is sufficient to suppress apoptosis triggered by paclitaxel or doxorubicin treatment. Downregulation of PRKCQ also enhanced the apoptosis of chemotherapy-treated TNBC cells. Regulation of chemotherapy sensitivity by PRKCQ mechanistically occurs via regulation of levels of Bim, a pro-apoptotic Bcl2 family member; suppression of Bim prevents the enhanced apoptosis observed with combined PRKCQ downregulation and chemotherapy treatment. Regulation of Bim and chemotherapy sensitivity is significantly dependent on PRKCQ kinase activity; overexpression of a catalytically inactive PRKCQ does not suppress Bim or chemotherapy-associated apoptosis. Furthermore, PRKCQ kinase inhibitor treatment suppressed growth, increased anoikis and Bim expression, and enhanced apoptosis of chemotherapy-treated TNBC cells, phenocopying the effects of PRKCQ downregulation. CONCLUSIONS These studies support PRKCQ inhibition as an attractive therapeutic strategy and complement to chemotherapy to inhibit the growth and survival of TNBC cells.
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Affiliation(s)
- Jessica H Byerly
- Division of Hematology and Medical Oncology, Department of Medicine, New York, USA
| | - Elisa R Port
- Department of Surgery, Mount Sinai Hospital, New York, NY, 10029, USA
| | - Hanna Y Irie
- Division of Hematology and Medical Oncology, Department of Medicine, New York, USA. .,Department of Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, 1468 Madison Avenue, New York, NY, 10029, USA.
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Ho CL, Li LH, Weng YC, Hua KF, Ju TC. Eucalyptus essential oils inhibit the lipopolysaccharide-induced inflammatory response in RAW264.7 macrophages through reducing MAPK and NF-κB pathways. BMC Complement Med Ther 2020; 20:200. [PMID: 32600338 PMCID: PMC7325248 DOI: 10.1186/s12906-020-02999-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/22/2020] [Indexed: 12/12/2022] Open
Abstract
Background Eucalyptus essential oils have been used in traditional medicine for centuries. It was reported that Eucalyptus leaves possess antioxidant and antimicrobial effects. Here, we investigated the anti-inflammatory activity of the essential oils extracted from the leaves of four different Eucalyptus species in RAW264.7 macrophages. Methods Lipopolysaccharide (LPS)-activated RAW264.7 macrophages were used to evaluate the anti-inflammatory activity of the leaf essential oils of Eucalyptus. The cell survival was quantified by an Alamar Blue assay. Nitric oxide (NO) production was assessed by Griess reaction. TNF-α and IL-6 production were measured by enzyme-linked immunosorbent assay (ELISA). Nuclear factor-κB (NF-κB) transcriptional activity was measured by NF-κB reporter assay. Intracellular protein expression levels were determined by Western blot. The expression levels of inducible NO synthase (iNOS), cyclooxygenase-2 (COX-2), mitogen-activated protein kinase (MAPK), protein kinase C (PKC) and NF-κB pathway were measured by western blot in LPS-activated RAW 264.7 macrophage. Results The essential oils extracted from Eucalyptus citriodora leaf exert the best NO inhibitory activity in LPS-activated RAW264.7 macrophages. The essential oils were fractionated into fractions A-H, and fraction F has been demonstrated to inhibit the expression levels of TNF-α, IL-6, NO, iNOS and COX-2 in LPS-activated RAW264.7 macrophages. Mechanistic analysis revealed that fraction F reduced the phosphorylation levels of ERK1/2, p38, PKC-α, PKC-ε and PKC-δ, and inhibited the NF-κB transcriptional activity. The chemical composition of Fraction F was determined by GC-MS. Conclusions The discoveries made herein could help develop innovative nonsteroidal anti-inflammatory drugs with minimal side effects and strong efficacy. Clinical trials on these Eucalyptus leaf essential oils will help customize and optimize their therapeutic administration.
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Affiliation(s)
- Chen-Lung Ho
- Division of Wood Cellulose, Taiwan Forestry Research Institute, Taipei, Taiwan
| | - Lan-Hui Li
- Department of Laboratory Medicine, Linsen, Chinese Medicine and Kunming Branch, Taipei City Hospital, Taipei, Taiwan.,Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yueh-Chun Weng
- EMA program in College of Bioresources, National Ilan University, Ilan, Taiwan
| | - Kuo-Feng Hua
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.,Department of Biotechnology and Animal Science, National Ilan University, Ilan, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Tz-Chuen Ju
- Department of Animal Science and Biotechnology, Tunghai University, No. 1727, Sec. 4, Taiwan Blvd., Xitun Dist, Taichung City, 40704, Taiwan.
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Ozay EI, Shanthalingam S, Sherman HL, Torres JA, Osborne BA, Tew GN, Minter LM. Cell-Penetrating Anti-Protein Kinase C Theta Antibodies Act Intracellularly to Generate Stable, Highly Suppressive Regulatory T Cells. Mol Ther 2020; 28:1987-2006. [PMID: 32492367 PMCID: PMC7474270 DOI: 10.1016/j.ymthe.2020.05.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/21/2020] [Accepted: 05/19/2020] [Indexed: 01/27/2023] Open
Abstract
Regulatory T cells maintain immunological tolerance and dampen inflammatory responses. Administering regulatory T cells can prevent the immune-mediated tissue destruction of graft-versus-host disease, which frequently accompanies hematopoietic stem cell transfer. Neutralizing the T cell-specific kinase, protein kinase C theta, which promotes T cell effector functions and represses regulatory T cell differentiation, augments regulatory T cell immunosuppression and stability. We used a synthetic, cell-penetrating peptide mimic to deliver antibodies recognizing protein kinase C theta into primary human CD4 T cells. When differentiated ex vivo into induced regulatory T cells, treated cells expressed elevated levels of the regulatory T cell transcriptional regulator forkhead box P3, the surface-bound immune checkpoint receptor programmed death receptor-1, and pro-inflammatory interferon gamma, previously ascribed to a specific population of stable, highly suppressive human induced regulatory T cells. The in vitro suppressive capacity of these induced regulatory T cells was 10-fold greater than that of T cells differentiated without antibody delivery. When administered at the time of graft-versus-host disease induction, using a humanized mouse model, antibody-treated regulatory T cells were superior to non-treated T cells in attenuating lethal outcomes. This antibody delivery approach may overcome obstacles currently encountered using patient-derived regulatory T cells as a cell-based therapy for immune modulation.
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Affiliation(s)
- E Ilker Ozay
- Graduate Program in Molecular and Cellular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Sudarvili Shanthalingam
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Heather L Sherman
- Graduate Program in Molecular and Cellular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Joe A Torres
- Graduate Program in Molecular and Cellular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Barbara A Osborne
- Graduate Program in Molecular and Cellular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA; Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Gregory N Tew
- Graduate Program in Molecular and Cellular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA; Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, MA 01003, USA; Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Lisa M Minter
- Graduate Program in Molecular and Cellular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA; Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, MA 01003, USA.
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Recent insights of T cell receptor-mediated signaling pathways for T cell activation and development. Exp Mol Med 2020; 52:750-761. [PMID: 32439954 PMCID: PMC7272404 DOI: 10.1038/s12276-020-0435-8] [Citation(s) in RCA: 209] [Impact Index Per Article: 52.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 03/26/2020] [Accepted: 04/08/2020] [Indexed: 12/18/2022] Open
Abstract
T cell activation requires extracellular stimulatory signals that are mainly mediated by T cell receptor (TCR) complexes. The TCR recognizes antigens on major histocompatibility complex molecules with the cooperation of CD4 or CD8 coreceptors. After recognition, TCR-induced signaling cascades that propagate signals via various molecules and second messengers are induced. Consequently, many features of T cell-mediated immune responses are determined by these intracellular signaling cascades. Furthermore, differences in the magnitude of TCR signaling direct T cells toward distinct effector linages. Therefore, stringent regulation of T cell activation is crucial for T cell homeostasis and proper immune responses. Dysregulation of TCR signaling can result in anergy or autoimmunity. In this review, we summarize current knowledge on the pathways that govern how the TCR complex transmits signals into cells and the roles of effector molecules that are involved in these pathways.
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Benedetti A, Fiore PF, Madaro L, Lozanoska-Ochser B, Bouché M. Targeting PKCθ Promotes Satellite Cell Self-Renewal. Int J Mol Sci 2020; 21:ijms21072419. [PMID: 32244482 PMCID: PMC7177808 DOI: 10.3390/ijms21072419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/23/2020] [Accepted: 03/30/2020] [Indexed: 11/16/2022] Open
Abstract
Skeletal muscle regeneration following injury depends on the ability of satellite cells (SCs) to proliferate, self-renew, and eventually differentiate. The factors that regulate the process of self-renewal are poorly understood. In this study we examined the role of PKCθ in SC self-renewal and differentiation. We show that PKCθ is expressed in SCs, and its active form is localized to the chromosomes, centrosomes, and midbody during mitosis. Lack of PKCθ promotes SC symmetric self-renewal division by regulating Pard3 polarity protein localization, without affecting the overall proliferation rate. Genetic ablation of PKCθ or its pharmacological inhibition in vivo did not affect SC number in healthy muscle. By contrast, after induction of muscle injury, lack or inhibition of PKCθ resulted in a significant expansion of the quiescent SC pool. Finally, we show that lack of PKCθ does not alter the inflammatory milieu after acute injury in muscle, suggesting that the enhanced self-renewal ability of SCs in PKCθ-/- mice is not due to an alteration in the inflammatory milieu. Together, these results suggest that PKCθ plays an important role in SC self-renewal by stimulating their expansion through symmetric division, and it may represent a promising target to manipulate satellite cell self-renewal in pathological conditions.
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50
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Philipson BI, O'Connor RS, May MJ, June CH, Albelda SM, Milone MC. 4-1BB costimulation promotes CAR T cell survival through noncanonical NF-κB signaling. Sci Signal 2020; 13:13/625/eaay8248. [PMID: 32234960 DOI: 10.1126/scisignal.aay8248] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Clinical response to chimeric antigen receptor (CAR) T cell therapy is correlated with CAR T cell persistence, especially for CAR T cells that target CD19+ hematologic malignancies. 4-1BB-costimulated CAR (BBζ) T cells exhibit longer persistence after adoptive transfer than do CD28-costimulated CAR (28ζ) T cells. 4-1BB signaling improves T cell persistence even in the context of 28ζ CAR activation, which indicates distinct prosurvival signals mediated by the 4-1BB cytoplasmic domain. To specifically study signal transduction by CARs, we developed a cell-free, ligand-based activation and ex vivo culture system for CD19-specific CAR T cells. We observed greater ex vivo survival and subsequent expansion of BBζ CAR T cells when compared to 28ζ CAR T cells. We showed that only BBζ CARs activated noncanonical nuclear factor κB (ncNF-κB) signaling in T cells basally and that the anti-CD19 BBζ CAR further enhanced ncNF-κB signaling after ligand engagement. Reducing ncNF-κB signaling reduced the expansion and survival of anti-CD19 BBζ T cells and was associated with a substantial increase in the abundance of the most pro-apoptotic isoforms of Bim. Although our findings do not exclude the importance of other signaling differences between BBζ and 28ζ CARs, they demonstrate the necessary and nonredundant role of ncNF-κB signaling in promoting the survival of BBζ CAR T cells, which likely underlies the engraftment persistence observed with this CAR design.
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Affiliation(s)
- Benjamin I Philipson
- Medical Scientist Training Program, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA.,Department of Pathology and Laboratory Medicine, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA.,Department of Medicine, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Roddy S O'Connor
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Michael J May
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA 19104, USA
| | - Carl H June
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Steven M Albelda
- Department of Medicine, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Michael C Milone
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA.
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